JP2017157365A - Contact connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact connection structure in a low cost, which has high electrical reliability.SOLUTION: A contact connection structure comprises: a male terminal 1 having a male tab part 2; and a female terminal 11 having an elastic bending part 13 and a holding contact part 14, and is contacted at a terminal fitting position with a bending deformation return force of the elastic bending part 13 as a contact load. The elastic bending part 13 is provided in the cantilevered manner that the elastic bending part is warped toward a tip for a movement locus to the terminal fitting position from a terminal fitting start position. The elastic bending part 13 is contacted with an indent part 3 in a state where a warping state is bent and deformed to a direction to be returned by a pressing force of the indent part 3 of the male tab part 2 at the terminal fitting position.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a contact connection structure that performs electrical connection between a first terminal and a second terminal.

  FIG. 8 shows a female terminal and a male terminal to which a conventional contact connection structure is applied (see Patent Document 1). As shown in FIG. 8, the female terminal 61 has a rectangular box portion 62. In the box portion 62, an elastic deflecting portion 63 provided integrally with the box portion 62 is disposed. The elastic deflecting portion 63 is provided with an indent portion 64 that protrudes toward the upper surface side. The indented portion 64 has a substantially spherical outer peripheral surface, and the center vertex is located above. The castle wall of the box portion 62 is provided with a bead portion (clamping contact portion) 66 that is disposed to face the elastic deflecting portion 13.

  A tin plating layer 65 is formed on the outer surface of the female terminal 61 from the viewpoint of improving connection reliability in a high temperature environment and improving corrosion resistance in a corrosive environment.

  The male terminal 71 has a flat male tab portion 72. A tin plating layer (not shown) is also formed on the outer surface of the male terminal 71.

  In the above configuration, when the male tab portion 72 of the male terminal 71 is inserted into the box portion 62 of the female terminal 61, the elastic bending portion 63 is deformed and the insertion of the male tab portion 72 is allowed. In the insertion process of the male tab portion 72, the male tab portion 72 slides on the indent portion 64 of the elastic bending portion 63, and at the terminal fitting position, as shown in FIG. 8, the indent portion 64 of the elastic bending portion 63 and the male tab portion 72 contact surfaces come into contact. At the terminal fitting position, the contact surface of the indented portion 64 of the female terminal 61 and the male tab portion 72 of the male terminal 71 is in electrical contact with the bending deformation restoring force of the elastic deflecting portion 63 as a contact load.

  Here, since the tin-plated oxide film is more easily broken than the aluminum oxide film, the tin-plated oxide film is broken by a contact load, and electrical reliability can be improved.

JP 2014-40649 A

  However, since the tin plating treatment requires a pretreatment such as a zincate treatment (zinc cleaning) for the purpose of removing the oxide film, there is a problem that the cost is increased.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide a contact connection structure with low cost and high electrical reliability.

  The present invention includes a first terminal having a male tab portion with a protruding indent portion, an elastic deflection portion, and a second terminal having a clamping contact portion disposed opposite to the elastic deflection portion, and a terminal fitting position Then, in the contact connection structure in which the male tab portion is fitted between the elastic bent portion deformed and deformed and the holding contact portion, and the elastic deformation portion is brought into contact with the bending deformation return force as a contact load. The elastic bending portion is provided in a cantilever shape that warps toward the tip with respect to a movement trajectory from the terminal fitting start position of the male tab portion to the terminal fitting position, and the elastic bending portion is a terminal fitting. In the mating position, the contact connection structure is characterized in that the indented portion is brought into contact with the indented portion in a state of being bent and deformed in a direction in which the warped shape is returned by the pressing force of the indented portion of the male tab portion.

  According to the present invention, in the terminal insertion process, the indent portion of the male tab portion slides on the contact surface of the elastic deflection portion, and the elastic deflection portion is returned to the warped form by the pressing force of the indent portion of the male tab portion. It is bent and deformed in the direction. Due to the elongation deformation of the elastic bending portion, the oxide film at the elongation deformation portion is broken, and the indent portion comes into contact with the broken portion of the oxide film. Since the oxide film is destroyed by the elongation deformation in this way, even an oxide film that is not destroyed by a large contact load is also destroyed. Therefore, it is not necessary to apply metal plating that generates an oxide film that is easily broken. As described above, it is possible to provide a contact connection structure with low cost and high electrical reliability.

1 shows an embodiment of the present invention, in which (a) is a perspective view of a male terminal before terminal connection, (b) is a perspective view of a female terminal before terminal connection, and (c) is a perspective view of an essential part of an elastic bending portion. is there. 1 shows an embodiment of the present invention, (a) is a cross-sectional view of a female terminal and a male terminal at the start of terminal fitting, (b) is a cross-sectional view of a main part of a contact connection point at the start of terminal fitting, (c). Is a cross-sectional view of a female terminal and a male terminal at the time of terminal fitting, and FIG. A 1st reference example is shown, (a) is a principal part perspective view of the male terminal before terminal connection, (b) is principal part sectional drawing of the male terminal before terminal connection. 1st reference example is shown, (a) is a sectional view of a female terminal and a male terminal at the time of terminal fitting, (b) is a principal part sectional view of a male tab part at the time of terminal fitting, and an elastic bending part, (c) is It is principal part sectional drawing of the male tab part at the time of terminal fitting. A 2nd reference example is shown, (a) is a top view of the male terminal before terminal connection, (b) is sectional drawing which follows the AA line of (a). A 2nd reference example is shown, (a) is a principal part side view of the elastic bending part before terminal connection, (b) is a principal part bottom view of the elastic bending part before terminal connection. A 2nd reference example is shown, (a) is principal part sectional drawing of the elastic bending part and male tab part at the time of terminal fitting start, (b) is principal part sectional drawing of the elastic bending part and male tab part in a terminal fitting process (C) is a principal part sectional view of the elastic bending part and male tab part at the time of terminal fitting, (d) is a principal part top view corresponding to (a), (e) is a principal part plane corresponding to (b). FIG. 4F is a plan view of a main part corresponding to FIG. It is sectional drawing of the female terminal and male terminal at the time of terminal fitting which shows a prior art example.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(Embodiment)
1 and 2 show an embodiment of the present invention. The contact connection structure according to the present invention is applied between the male terminal as the first terminal and the female terminal as the second terminal. This will be described below.

  The male terminal 1 is disposed in a terminal accommodating chamber in a male connector housing (not shown). The male terminal 1 is formed by bending a conductive metal (aluminum material) punched into a predetermined shape.

  The male terminal 1 has a male tab portion 2 as shown in FIG. The male tab portion 2 has a flat plate shape. In the vicinity of the distal end of the male tab portion 2 in the terminal insertion direction, an indent portion 3 protruding downward from the bottom surface is provided. The indented portion 3 has a substantially spherical outer peripheral surface, and the center vertex is located at the lowest position.

  The female terminal 11 is disposed in a terminal accommodating chamber in a female connector housing (not shown). The female terminal 11 is formed by bending a conductive metal (aluminum material) punched into a predetermined shape.

  The female terminal 11 has a box portion 12 as shown in FIG. The box part 12 has a rectangular shape with an opening at the front. In the box part 12, an elastic bending part 13 bent from the bottom part of the box part 12 and a clamping contact part 14 arranged to face the elastic bending part 13 are arranged.

  The elastic bending portion 13 is moved from the terminal fitting start position of the male tab portion 2 (position shown in FIGS. 2A and 2B) to the terminal fitting position (position shown in FIGS. 2C and 2D). It is provided in a cantilever form that warps toward the tip with respect to the movement locus. As shown in FIGS. 2B and 2D, the elastic deflecting portion 13 has an oxide film 13b formed on the outer surface of a base material 13a such as an aluminum material.

  The holding contact portion 14 is formed by bending the top wall of the box portion 12. The elastic bending part 13 and the clamping contact part 14 of the box part 12 are arranged at intervals. An oxide film on the outer surface of the holding contact portion 14 is also generated.

  In the above configuration, when a female connector housing (not shown) and a male connector housing (not shown) are fitted together, the male tab portion 2 of the male terminal 1 becomes the box portion 12 of the female terminal 11 in the fitting process. Inserted into. Then, as shown in FIGS. 2A and 2B, first, the indent portion 3 of the male tab portion 2 comes into contact with the elastic bending portion 13, and when the insertion proceeds further from this contact portion, the elastic bending portion 13 is bent. It deform | transforms and insertion of the male tab part 2 is accept | permitted. In the insertion process of the male tab portion 2, the indent portion 3 slides on the contact surface of the elastic bending portion 13, and the elastic bending portion 13 is returned in the direction in which the warping configuration is returned by the pressing force of the indent portion 3 of the male tab portion 2 (downward). To be deformed. The oxide film 13b at the stretch-deformed portion is broken by the stretch deformation of the elastic deflecting portion 13, and at the terminal fitting position, the indent portion 3 contacts at the place where the oxide film 13b is broken. Since the oxide film 3b is destroyed by the elongation deformation in this way, the oxide film 3b that is not destroyed even by a large contact load is also destroyed. As shown in FIGS. 2C and 2D, the indent portion 3 comes into contact with the base material 13 a of the elastic bending portion 13 at the terminal fitting position.

  In this contact connection structure, since the destruction of the oxide film 13b formed on the outer surface of the base material 13a of the elastic bending portion 13 is promoted in the insertion process of the male tab portion 2, the contact resistance between the male terminal 1 and the female terminal 11 is promoted. Is reduced. For the reasons described above, the aluminum oxide film 13b which is not easily destroyed is also destroyed, so that it is not necessary to perform metal plating (for example, tin plating) on which an easily damaged oxide film is formed unlike the conventional example. As described above, it is possible to provide a contact connection structure with low cost and high electrical reliability.

(First Reference Example)
3 and 4 show a first reference example. In the first reference example, the male terminal 21 and the female terminal 31 are both made of an aluminum material as in the above embodiment. In the first reference example, the cross-sectional shape of the male tab portion 22 of the male terminal 21 and the cross-sectional shapes of the elastic bending portion 33 and the clamping contact portion 34 of the female terminal 31 are different from those of the above embodiment. Details will be described below.

  As shown in FIGS. 3 and 4, the male terminal 21 has a male tab portion 22 formed in a corrugated shape with respect to a direction orthogonal to the terminal insertion direction. The male tab portion 22 has a lower concave portion 22 a and upper concave portions 22 b and 22 c that extend in the insertion direction of the male tab portion 22. The lower concave portion 22 a is formed at the center of the male tab portion 22 in the width direction. The upper concave portions 22b and 22c are formed on both sides in the width direction of the lower concave portion 22a.

  The female terminal 31 has a box portion 32 as shown in FIG. The box part 32 has a rectangular shape with an opening at the front. In the box portion 32, an elastic bending portion 33 bent from the bottom surface portion of the box portion 32 and a sandwiching contact portion 34 disposed to face the elastic bending portion 33 are arranged. The elastic bending portion 33 and the clamping contact portion 34 of the box portion 32 are arranged with an interval therebetween. The male tab portion 22 of the male terminal 21 is inserted between the elastic bending portion 33 and the clamping contact portion 34 of the box portion 32.

  The elastic bending portion 33 has an indent portion 33 a that fits into the concave portion 22 a on the lower side of the male tab portion 22. The indent portion 33a contacts at two left and right points P1 and P2 with the center of the lower concave portion 22a as a boundary (see FIGS. 4B and 4C).

  The clamping contact portion 34 has protrusions 34 a and 34 b that fit into the recesses 22 b and 22 c on the upper side of the male tab portion 22. One protrusion 34a is in contact with two left and right points P3 and P4 with the center of the upper recess 22b as a boundary, and the other protrusion 34b is in contact with two left and right points P5 and P6 with the center of the upper recess 22c as a boundary. (See FIG. 4C).

  In the above configuration, when the male tab portion 22 of the male terminal 21 is inserted into the box portion 32 of the female terminal 31, the indent portion 33a of the elastic bending portion 33 is a concave portion on the lower side of the male tab portion 22, as shown in FIG. The male tab portion 22 and the indent portion 33a come into contact at two left and right points P1 and P2. Then, the wave-shaped part of the male tab part 22 receives the external force F shown in FIG.4 (b). Due to the vertical component force fv and the horizontal component force fh of the external force F, as shown by an arrow B in FIG. 4C, the wave-shaped portion of the male tab portion 22 is stretched in a flat surface. Further, the protrusions 34 a and 34 b of the holding contact portion 34 enter the recesses 22 b and 22 c on the upper side of the male tab portion 22. The male tab portion 22 and the protruding portion 34a are in contact at two left and right points P3 and P4, and the male tab portion 22 and the other protruding portion 34b are in contact at other left and right two points P5 and P6. Then, the corrugated portion of the male tab portion 22 receives an external force, and the external force causes the corrugated portion of the male tab portion 22 to stretch and deform in a direction that becomes a flat surface, as indicated by arrows C and D in FIG. To do.

  In the first reference example, the corrugated portion of the male tab portion 22 extends and deforms in the direction of becoming a flat surface during the insertion process of the male tab portion 22, so that the aluminum oxide film formed on the outer surface of the male tab portion 22 is destroyed. The contact resistance between the male terminal 21 and the female terminal 31 is reduced.

  Since the aluminum oxide film (not shown) that is not easily broken is also broken, it is not necessary to apply metal plating (for example, tin plating) on which an easily broken oxide film is formed unlike the conventional example. As described above, it is possible to provide a contact connection structure with low cost and high electrical reliability.

(Second reference example)
5 and 6 show a second reference example. In the second reference example, the male terminal 41 and the female terminal 51 are both formed of an aluminum material as in the above embodiment. In the second reference example, the shape of the male tab portion 42 of the male terminal 41 and the shape of the elastic bending portion 52 of the female terminal 51 are different from those of the above embodiment. Details will be described below.

  As shown in FIG. 5, the male terminal 41 has a male tab portion 42. The male tab portion 42 includes a protrusion 43 provided in the center in the width direction, wall portions 44 provided upright at both ends in the width direction, and a pair of left and right inclined portions 45 that are folded back toward each other from the top of each wall portion 44. And have. The projecting portion 43 projects upward from the bottom surface of the male tab portion 42. The protrusion 43 is arranged at a position behind the inclined portion 45. The pair of left and right inclined portions 45 are arranged with an interval G therebetween. Each inclined portion 45 is gradually inclined upward from the front end of the male tab portion 42 toward the rear.

  The female terminal 51 has a box part (not shown). The box part has a rectangular shape with an opening at the front. In the box part, as shown in FIG. 6, the elastic bending part 52 bent from the box part and the clamping contact part (not shown) opposed to the elastic bending part 52 are arrange | positioned. The elastic bending part 52 and the clamping contact part of the box part are arranged at intervals. The male tab portion 42 of the male terminal 41 is inserted between the elastic bending portion 52 and the clamping contact portion of the box portion.

  A pair of left and right flange portions 53 that slide on the pair of inclined portions 45 when the male tab portion 42 is inserted are integrally provided at the distal end of the elastic bending portion 52. An indent portion 54 that protrudes downward is provided at the center of the elastic deflecting portion 52 provided with the left and right flange portions 53. The width dimension W <b> 1 of the elastic bending portion 52 is smaller than the gap G <b> 1 between the pair of inclined portions 45. The width dimension W2 between the end surfaces of the pair of flange portions 53 is set to be larger than the gap G1 between the pair of inclined portions 45 and smaller than the dimension G2 between the inner surfaces of the left and right wall portions 44.

  In the above configuration, when the male tab portion 42 of the male terminal 41 is inserted into the box portion of the female terminal 51, first, the pair of left and right inclined portions 45 of the male tab portion 42 are elastically bent as shown in FIGS. The left and right flange portions 53 of the portion 52 are in contact with each other. When the insertion further proceeds from the contact portion, as shown in FIGS. 7B and 7E, the elastic bending portion 52 is bent and deformed, and the insertion of the male tab portion 42 is allowed. In the insertion process of the male tab portion 42, the pair of flange portions 53 slide on the pair of inclined portions 45 of the male tab portion 42, and the flange portion 53 is gradually pushed upward along the upper surface of the inclined portion 45. Thereby, the bending deformation restoring force is stored in the elastic bending portion 52. Next, at the end of insertion, as shown in FIGS. 7C and 7F, since the flange portion 53 moves rearward from the inclined portion 45, the elastic bending portion 52 is rapidly lowered by the bending deformation restoring force, At the terminal fitting position, the indent portion 54 of the elastic deflecting portion 52 lands (collises) on the protrusion 43 of the male tab portion 42, and the oxide film on the contact surface between the indent portion 54 and the protrusion 43 of the male tab portion 42 by this impact load. The destruction of is promoted.

  In the second reference example, at the end of insertion, an impact load acting on the contact surface of the indented portion 54 of the elastic deflecting portion 52 and the protruding portion 43 of the male tab portion 42 is formed on the contact surface of the protruding portion 43 of the indented portion 54. The destruction of the aluminum oxide film is promoted, and the contact resistance between the male terminal 41 and the female terminal 51 is reduced.

  Since the aluminum oxide film (not shown) that is not easily broken is also broken, it is not necessary to apply metal plating (for example, tin plating) on which an easily broken oxide film is formed unlike the conventional example. As described above, it is possible to provide a contact connection structure with low cost and high electrical reliability.

1 Male terminal (first terminal)
2 Male tab 3 Indent 11 Female terminal (second terminal)
13 Elastic deflection part 14 Contact part for clamping

Claims (1)

A first terminal having a male tab portion with a protruding indent portion;
An elastic flexure and a second terminal having a clamping contact portion disposed opposite to the elastic flexure;
In the terminal fitting position, the contact is fitted between the elastic bent portion and the holding contact portion where the male tab portion is bent and deformed, and is contacted with the bending deformation return force of the elastic bent portion as a contact load. In the connection structure,
The elastic bending portion is provided in a cantilever shape that warps toward the tip with respect to a movement trajectory from the terminal fitting start position of the male tab portion to the terminal fitting position,
In the terminal fitting position, the elastic bending portion is in contact with the indent portion in a state where the elastic bending portion is bent and deformed in a direction in which a warped shape is returned by a pressing force of the indent portion of the male tab portion. Construction.

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