JP4076509B2 - Female terminal - Google Patents

Description

  The present invention relates to a female terminal, for example, a female terminal that conducts electricity by sandwiching a band-shaped male tab.

Conventionally, a female terminal as shown in FIGS. 15A and 15B is known (see, for example, Patent Document 1).
As shown in FIG. 15A, the female terminal 100 has a receptacle box 101. The receptacle box 101 includes a top portion 102, a bottom portion 103, and side portions (not shown). The top portion 102 has a recessed portion 102a having a rectangular shape at the center portion, and a rib 102b is provided along the insertion direction on the lower surface of the recessed portion 102a. Further, the end portion on the entrance side of the recessed portion 102a is folded back, and the upper flap 102c is provided in the entrance side opening 104 (left side opening in FIG. 15). The upper flap 102c is bent downward into the opening 104 to form an acute angle. The corresponding lower flap 103a of the bottom portion 103 is bent back inside the receptacle box 101 so as to form an acute angle.

  A movable beam member 105 is mounted in a cantilever manner on the rear upper surface of the bottom 103, and the movable beam member 105 extends toward the entrance-side opening 104. The rear portion 105a of the movable beam member 105 is bent upward, bent once from the front end of the rear portion 105a to form a rear raised portion 105b, and bent again to form a central portion 105c. Further, the front end of the central portion 105c is once bent up and then bent down to form a front raised portion 105d, and bent down to form a front portion 105e.

Therefore, as shown in FIG. 15B, when the male tab 106 is inserted from the entrance side opening 104, the male tab 106 is guided into the receptacle box 101 by the cooperation of the flaps 102c and 103a. The male tab 106 abuts against the front raised portion 105 d and the rear raised portion 105 b of the movable beam member 105 to push down the movable beam member 105 and press the front end portion 105 f against the bottom portion 103. Due to the reaction force, the male tab 106 is pressed against and contacts the rib 102b of the top portion 102 to conduct.
JP-A-1-202328 (FIG. 5)

By the way, since the male tab 106 is pressed against the rib 102b of the top portion 102 by the front raised portion 105d, when the male tab 106 vibrates due to the play of the connector or the like, the male tab 106 and the front raised portion 105d rub against each other. 105d wears out.
This has the disadvantage that the electrical resistance increases.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to prevent an increase in electrical resistance by suppressing the occurrence of wear at the contact point due to the vibration of the inserted male tab. It is to provide a female terminal.

1) In order to achieve the above-described object, a female terminal according to the present invention includes a pair of sandwiching plates extending along the insertion direction of the male tabs, A female terminal including a box portion that accommodates a holding plate, wherein the box portion is formed by bending a single plate material, and the holding plate is formed by cutting and raising a part of the plate material, Further, the plate member forming the tongue is formed by cutting and raising a tongue piece serving as a fulcrum of the lever of the holding plate, and each holding plate is on the front side in the insertion direction of the male tab, and between the holding plates. The front end where the gap dimension exceeds the thickness dimension of the male tab and the back end where the gap dimension between the clamping plates is less than the thickness dimension of the male tab, on the back side in the insertion direction of the male tab and parts, there between said proximal end the inner end, between the holding plates are each other It has a curved portion which is curved and away in a supporting portion for connecting the back end portion to said box portion, and is pressed into the tip portion of the male tab between the respective back end portions The top of the curved portion is inscribed in the tongue of the box, and the front side ends approach each other by lever action with the tongue as a fulcrum. It is characterized by pinching.

  In the female terminal configured as described above, the pair of holding plates housed in the box portion conducts by holding the band-shaped male tab. That is, the pair of clamping plates has a gap between the front sides of the front side of the male tab in the insertion direction that exceeds the thickness of the male tab, so that the male tab is clamped to the front side of the clamping plate when inserted. It is easily inserted without being done. On the other hand, since the back clearance between the back ends of the male tab in the insertion direction is less than the thickness of the male tab, when the male tab is pushed between the back ends, the distance between the back ends Press to expand. Here, since the pair of sandwiching plates have curved portions that are curved in the thickness direction so that the respective substantially central portions in the longitudinal direction are separated from each other, when the distance between the back end portions is expanded by a male tab, The curved portion contacts the inner surface of the box portion. With this contact point as a fulcrum, the front end is pressed against and held by the male tab by lever action, so that the male tab can be connected with a low insertion force.

In addition , when the male tab pushes and expands the back side terminal of the clamping plate, the clamping plate rotates around the fulcrum provided in the box, and the front end of the clamping plate clamps the male tab by lever action. The male tab can be connected with low insertion force.
In addition, since the sandwiching plate is integrally formed with the box part, the number of parts can be reduced and it can be easily formed.

2 ) Further, the female terminal according to the present invention is characterized in that the respective front side end portions are arranged in the vicinity of the insertion opening of the box portion.

  In the female terminal configured as described above, the front side end portion of the holding plate that holds the male tab is provided in the vicinity of the insertion opening in the box portion, so that the male tab vibrates and collides with the box portion. Can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, the problem of the electrical resistance increase by the fine sliding abrasion like the past can be eliminated, and even if it uses it in a place with much vibration, the female terminal which is hard to be influenced by vibration can be provided.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. 1 is a cross-sectional view showing a first embodiment of the female terminal of the present invention, FIG. 2 is a cross-sectional view as seen from the II direction in FIG. 1, FIG. 3 is an end view as seen from the III direction in FIG. The perspective view which shows the state cut | disconnected by the IV-IV position in FIG. 3, FIG. 5 (A)-(C) is explanatory drawing which shows the manufacturing process of a female terminal, FIG. 6 (A) is the state which has inserted the male tab. FIG. 6B is a cross-sectional view showing a state where the male tab is clamped.

  As shown in FIGS. 1 to 4, the female terminal 10 </ b> A according to the first embodiment of the present invention has a rectangular tube-shaped box portion 11 having a rectangular cross section on the outside, and a front surface (left end surface in FIG. 1). Has an opening 12 as an insertion opening. In the internal space 11a of the box part 11, a pair of upper and lower clamping plates 20U and 20D extending along the insertion direction of the band-shaped male tab 30 (see FIG. 6) are provided. Further, a U-shaped notch is provided in the central portion of the top plate 11U of the box portion 11, and the tongue piece 13 as a fulcrum is curved so that the back side (right side in FIG. 1) hangs down to the internal space 11a. Is provided.

As shown in FIG. 1, each clamping plate 20U, 20D is composed of terminal portions 21U, 21D whose front ends extend to the vicinity of the opening 12, and support portions 22U, 22D on the back side of the terminal portions 21U, 21D. The terminal portions 21U and 21D are supported in a cantilevered state by the support portions 22U and 22D. The terminal portions 21U and 21D have a strip shape that is long in the insertion direction (rightward in FIG. 1), and are integrated with the box portion 11 by the support portions 22U and 22D provided on the back side of the sandwiching plates 20U and 20D. It is supported by.
The support portion 22U of the upper holding plate 20U is supported by the left side wall 11L (upper wall in FIG. 2) of the box portion 11, and the support portion 22D of the lower holding plate 20D is set to the right side wall 11R of the box portion 11 ( It is supported by the lower wall in FIG. For this reason, the sandwiching plates 20U and 20D have a structure that easily follows the vibration in the vertical direction.

  The terminal portions 21U and 21D of the sandwiching plates 20U and 20D are provided with curved portions 23U and 23D that are curved in the thickness direction (vertical direction in FIG. 1) so as to be separated from each other at a substantially central portion in the longitudinal direction. . The back side gap dimension D1, which is the distance between the back side end parts of the terminal portions 21U, 21D of each clamping plate 20U, 20D, is less than the thickness dimension D0 (see FIG. 6) of the male tab 30, and the front side end part distance. The front side gap dimension D2 is set to be equal to or greater than the thickness dimension D0 of the male tab 30. That is, D2> D0> D1.

As shown in FIG. 5, the female terminal 10 </ b> A can be made from a single plate material 14 </ b> A.
That is, as shown in FIG. 5A, U-shaped cutouts 15a and 15b for the tongue piece 13 are provided at portions corresponding to the top plate 11U and the bottom plate 11B. Further, an overall L-shaped notch 15c for the upper clamping plate 20U is provided in a portion corresponding to the left side wall 11L, and an overall L-shaped notch 15d for the lower clamping plate 20D is provided in a portion corresponding to the right side wall 11R. Provide.

  Subsequently, as shown in FIG. 5B, the notch 15a (and the notch 15c) are curved upward to form a tongue piece 13U (13D) as a fulcrum. Further, the upper clamping plate 20U (20D) is formed by bending the cutout 15b (and 15d) from the root to the upper side at a right angle. Further, as shown in FIG. 5C, the terminal portion 21U (21D) of the sandwiching plate 20U (20D) is curved, and finally, the plate member 14A is formed in a rectangular cylindrical shape so that the sandwiching plates 20U and 20D are horizontal. Are joined together.

  As shown in FIG. 6A, when the male tab 30 is inserted into the female terminal 10A thus created, the near side clearance dimension D2 of the sandwiching plates 20U, 20D is larger than the thickness D0 of the male tab 30. The male tab 30 is easily inserted. When the distal end of the male tab 30 reaches the rear end of the sandwiching plates 20U, 20D, the rear gap dimension D1 is smaller than the thickness D0 of the male tab 30, so the male tab 30 is located at the rear of both sandwiching plates 20U, 20D. The side end 24a is pushed and expanded (arrow a in FIG. 6B). For this reason, both sandwiching plates 20U and 20D move outward (up and down), and the vicinity of the tops of the curved portions 23U and 23D abut against the tongue piece 13. As shown in FIG. 6B, with the contact point with the tongue piece 13 as a fulcrum 24c, the front end 24b of both hands approaches as shown by the arrow b in the figure by lever action, and the base end side of the male tab 30 is moved. Hold it.

As described above, according to the female terminal 10A described above, when the male tab 30 is inserted and sandwiched between the rear side end 24a and the front side end 24b of the clamping plates 20U and 20D, the respective clamping plates 20U and 20D are on the front side. Since the end portion 24b is supported in a cantilever shape which is a free end, the front end portion 24b follows when the male tab 30 vibrates.
In particular, it can easily follow when it vibrates in the vertical direction. For this reason, the conventional problem that the sandwiching plates 20U and 20D are worn by the vertical vibration of the male tab 30 and the electrical resistance increases can be solved.
Moreover, in each clamping plate 20U, 20D, since the near side gap dimension D2 which is the distance between the near side ends is set to be equal to or larger than the thickness dimension D0 of the male tab 30, the male tab 30 can be easily inserted. The male tab 30 and the female terminal 10A can be connected with a low insertion force.

Next, the female terminal 10B which is 2nd Embodiment of this invention is demonstrated.
7 is a cross-sectional view showing a second embodiment of the female terminal of the present invention, FIG. 8 is a cross-sectional view seen from the VIII direction in FIG. 7, FIG. 9 is an end view seen from the IX direction in FIG. (A)-(D) is explanatory drawing which shows the manufacturing process of a female terminal.
In addition, the same code | symbol is attached | subjected to the site | part which is common in 10 A of female terminals which concern on 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

As shown in FIGS. 7 to 9, in this female terminal 10B, each clamping plate 20U, 20D has a terminal portion 21U, 21D extending to the vicinity of the opening 12 whose front end is an insertion port, and a terminal portion 21U, 21D. The terminal portions 21U and 21D are supported in a cantilever manner by the support portions 25U and 25D. The terminal portions 21U and 21D have a strip shape that is long in the insertion direction (rightward in FIG. 7), and are integrated with the box portion 11 by the support portions 25U and 25D provided on the back side of the sandwiching plates 20U and 20D. It is supported by.
The support portion 25U of the upper holding plate 20U is supported by the top plate 11U of the box portion 11, and the support portion 25D of the lower holding plate 20D is supported by the bottom plate 11B of the box portion 11. For this reason, the sandwiching plates 20U and 20D have a structure that easily follows the vibration in the front-rear direction.

As shown in FIG. 10, the female terminal 10B can be made from a single plate material 14B.
That is, as shown in FIG. 10 (A), a U-shaped notch 15a for the tongue 13 is provided in a portion corresponding to the top plate 11U, and the entire upper clamping plate 20U is provided on the back side of the notch 15a. An L-shaped notch 15c is provided. Similarly, a U-shaped notch 15b for the tongue piece 13 is provided in a portion corresponding to the bottom plate 11B, and an overall L-shaped notch 15d for the lower holding plate 20D is provided on the back side of the notch 15b.

  Subsequently, as shown in FIG. 10B, the notch 15a (and the notch 15c) are curved upward to form the tongue piece 13U (13D). Further, the sandwiching plates 20U and 20D are formed by bending the cutouts 15b (and 15d) from the base to a right angle upward, and as shown in FIG. 10C, the terminal portions 21U (20D) of the sandwiching plates 20U (20D) 21D) is curved to form curved portions 23U and 23D. Next, as shown in FIG. 10D, the clamping plates 20U and 20D are folded back to form the support portions 25U and 25D, and the terminal portions 21U and 21D are positioned so as to cover the tongue pieces 13. To do. Finally, the plate material 14B is bent into a rectangular cylindrical shape and joined together so that the terminal portions 21U and 21D of both sandwiching plates 20U and 20D are horizontal.

As described above, according to the female terminal 10B described above, when the male tab 30 is inserted and sandwiched between the rear end 24a and the front end 24b of the sandwiching plates 20U and 20D, the sandwiching plates 20U and 20D are on the front side. Since the end portion 24b is supported in a cantilever shape which is a free end, the front end portion 24b follows when the male tab 30 vibrates. In particular, it can easily follow when it vibrates in the front-rear direction (insertion direction). For this reason, the conventional problem that the sandwiching plates 20U and 20D are worn by the longitudinal vibration of the male tab 30 and the electrical resistance increases can be solved.
Moreover, in each clamping plate 20U, 20D, since the near side gap dimension D2 which is the distance between the near side ends is set to be equal to or larger than the thickness dimension D0 of the male tab 30, the male tab 30 can be easily inserted. The male tab 30 and the female terminal 10B can be connected with a low insertion force.

Next, a female terminal 10C according to a third embodiment of the present invention will be described.
11 is a sectional view showing a third embodiment of the female terminal of the present invention, FIG. 12 is a sectional view seen from the XII direction in FIG. 11, FIG. 13 is an end view seen from the XIII direction in FIG. (A)-(D) is explanatory drawing which shows the manufacturing process of a female terminal.
In addition, suppose that the same code | symbol is attached | subjected to the site | part which is common in 10 A of female terminals which concern on 1st Embodiment mentioned above, and the female terminal 10B which concerns on 2nd Embodiment, and the overlapping description is abbreviate | omitted.

As shown in FIGS. 11 to 13, in this female terminal 10C, each clamping plate 20U, 20D has a terminal portion 21U, 21D extending to the vicinity of the opening 12 whose front end is an insertion port, and a terminal portion 21U, 21D. The terminal portions 21U and 21D are supported in a cantilever manner by the support portions 26U and 26D. The terminal portions 21U and 21D have a strip shape that is long in the insertion direction (rightward in FIG. 11), and are integrated with the box portion 11 by the support portions 26U and 26D provided on the back side of the sandwiching plates 20U and 20D. It is supported by.
The support portion 26U of the upper holding plate 20U is supported by the top plate 11U of the box portion 11, and the support portion 25D of the lower holding plate 20D is supported by the bottom plate 11B of the box portion 11. For this reason, the sandwiching plates 20U and 20D have a structure that easily follows the vibration in the left-right direction.

As shown in FIG. 14, the female terminal 10 </ b> B can be made from a single plate material 14 </ b> C.
That is, as shown in FIG. 14A, a U-shaped notch 15a for the tongue 13 is provided in a portion corresponding to the top plate 11U, and the top plate 11U and the left side wall are provided at the back of the notch 15a. An overall L-shaped notch 15c for the upper clamping plate 20U is provided across 11L. Similarly, a U-shaped notch 15b for the tongue piece 13 is provided in a portion corresponding to the bottom plate 11B, and the bottom sandwiching plate 20D is disposed on the back side of the notch 15a across the bottom plate 11B and the right side wall 11R. An overall L-shaped cutout 15d is provided.

  Subsequently, as shown in FIG. 14B, the notch 15a (and the notch 15c) are curved upward to form the tongue piece 13U (13D). Further, the notch 15b (and 15d) is bent upward at a right angle from the base, and as shown in FIG. 14C, the terminal portion 21U (21D) of the holding plate 20U (20D) is bent to bend the curved portion 23U. , 23D. Next, as shown in FIG. 14D, the terminal portions 21U and 21D are folded back horizontally so as to form the support portions 26U and 26D so that the terminal portions 21U and 21D cover the tongue pieces 13U and 13D. Position. Finally, the plate member 14C is bent into a rectangular tube shape and integrally joined so that the terminal portions 21U and 21D of the both sandwiching plates 20U and 20D are horizontal.

As described above, according to the above-described female terminal 10C, when the male tab 30 is inserted and sandwiched between the back end 24a and the front end 24b of the sandwich plates 20U and 20D, the respective clamp plates 20U and 20D are on the near side. Since the end portion 24b is supported in a cantilever shape which is a free end, the front end portion 24b follows when the male tab 30 vibrates. In particular, it can easily follow when it vibrates in the left-right direction.
For this reason, the problem that the sandwiching plates 20U and 20D are worn by the horizontal vibration of the male tab 30 and the electrical resistance increases as in the conventional case can be solved.
Moreover, in each clamping plate 20U, 20D, since the near side gap dimension D2 which is the distance between the near side ends is set to be equal to or larger than the thickness dimension D0 of the male tab 30, the male tab 30 can be easily inserted. The male tab 30 and the female terminal 10C can be connected with a low insertion force.

The female terminals 10A, 10B, and 10C of the present invention are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
For example, in each of the above-described embodiments, the box portion 11 and the sandwiching plates 20U, 20D and the tongue piece 13 are integrally formed by cutting and bending from a single plate material 14A, 14B, 14C, It is also possible to combine a plurality of parts so as to be integrated.

It is sectional drawing which shows 1st Embodiment which concerns on the female terminal of this invention. It is sectional drawing seen from the II direction in FIG. It is the end elevation seen from the III direction in FIG. It is a perspective view which shows the state cut | disconnected in the IV-IV position in FIG. (A)-(C) are explanatory drawings which show the manufacturing process of a female terminal. (A) is sectional drawing which shows the state which has inserted the male tab, (B) is sectional drawing which shows the state by which the male tab was clamped. It is sectional drawing which shows 2nd Embodiment which concerns on the female terminal of this invention. It is sectional drawing seen from the VIII direction in FIG. It is the end elevation seen from IX direction in FIG. (A)-(D) are explanatory drawings which show the manufacturing process of a female terminal. It is sectional drawing which shows 3rd Embodiment which concerns on the female terminal of this invention. It is sectional drawing seen from the XII direction in FIG. It is the end elevation seen from the XIII direction in FIG. (A)-(D) are explanatory drawings which show the manufacturing process of a female terminal. (A) is sectional drawing which shows the conventional female terminal, (B) is sectional drawing which shows the state which clamped the male tab.

Explanation of symbols

10A, 10B, 10C Female terminal 11 Box 13 Tongue piece (fulcrum)
20U, 20D Clamping plate 23U, 23D Curved portion 24a Back side end 24b Front side end 30 Male tab D0 Thickness D1 Back side gap dimension D2 Between front side ends

Claims (2)

A female terminal comprising a pair of clamping plates extending along the insertion direction of the male tabs and a box portion for accommodating the clamping plates in order to clamp the belt-shaped male tabs in the thickness direction,
The box portion is formed by bending a single plate material, the clamping plate is formed by cutting and raising a part of the plate material, and the plate material forming the box portion is further provided with an insulator of the clamping plate. The tongue that becomes the fulcrum is cut and raised,
Each clamping plate is
On the front side in the insertion direction of the male tab, the front side end where the gap dimension between the sandwiching plates exceeds the thickness dimension of the male tab,
On the back side in the insertion direction of the male tab, a gap end between each clamping plate is less than the thickness dimension of the male tab,
There between the back end portion and said proximal end, and a curved portion between the sandwiching plates are curved away from each other,
A support part connecting the back side end part to the box part;
And when the front end of the male tab is press-fitted between the back end portions, the vicinity of the top of the curved portion is inscribed in the tongue piece of the box portion, and the tongue piece is used as a fulcrum. A female terminal, wherein the front side end portions approach each other and clamp the proximal end side of the male tab by lever action. 2. The female terminal according to claim 1, wherein each of the front side end portions is disposed in the vicinity of an insertion port of the box portion.

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