JP2015216110A - Contact connection structure - Google Patents

Abstract

Provided is a contact connection structure capable of reducing contact resistance without increasing the size of a terminal or making it as complex as possible.
An indented portion (4) is provided with an elastic bent portion (3) projecting and a tab portion (11), and the indented portion (4) of the elastic bent portion (3) slides on the contact surface of the tab portion (11) to complete terminal insertion. In the position, the indented portion 4 has a contact connection structure in which the tab portion 11 comes into contact with the contact portion side of the elastic deflecting portion 3, and the tab portion 11 slides before the indented portion 4 in the oxide film. A removal unit 5 was provided.
[Selection] Figure 1

Description

  The present invention relates to a contact connection structure for electrical connection of terminals.

  9 to 11 show a conventional female terminal and a male terminal (see Patent Document 1 as a similar technique).

  As shown in FIGS. 9 to 11, the female terminal 51 includes a rectangular box portion 52 and an elastic deflecting portion 53 provided integrally with the box portion 52 and disposed in the box portion 52.

  The elastic bending portion 53 is provided with an indent portion 54 that protrudes toward the bottom surface side.

  The indented portion 54 has a substantially spherical outer peripheral surface, and the center vertex is located at the lowest position.

  The female terminal 51 is tin-plated from the viewpoints of improving connection reliability in a high temperature environment and improving corrosion resistance in a corrosive environment.

  The male terminal 60 has a flat tab portion 61. The male terminal 60 is tin-plated from the viewpoint of improving connection reliability in a high temperature environment and improving corrosion resistance in a corrosive environment.

  As shown in FIG. 9, when the tab portion 61 of the male terminal 60 is inserted into the box portion 52 of the female terminal 51, the elastic bending portion 53 is deformed and the insertion of the tab portion 61 is allowed.

  In the insertion process of the tab part 61, the tab part 61 slides on the indent part 54 of the elastic bending part 53, and in the terminal insertion completion position, as shown in FIGS. 10 and 11, the indent part 54 of the elastic bending part 53 is shown. And the surface of the tab part 61 contact.

  In this conventional example, the indented portion 54 of the female terminal 51 and the contact surface of the tab portion 61 of the male terminal 60 are in electrical contact with each other using the bending return force of the elastic bending portion 53 as a contact load. A current flows through the contact surface to energize the female terminal 51 and the male terminal 60.

  By the way, the outer surfaces of the box portion 52 and the tab portion 61 are tin-plated over the entire area. When tin plating is performed and then reflow treatment is performed, the following structure is obtained.

  As shown in FIG. 12, copper / tin alloy layers 52b and 61b and tin plating layers 52c and 61c are formed on the outer surfaces of the copper alloy base material layers 52a and 61a, and on the outer surfaces of the tin plating layers 52c and 61c. Oxide films 52d and 61d are formed.

  The oxide films 52d and 61d have a very high electrical resistivity as compared with tin and copper. Therefore, in order to reduce the contact resistance, it is necessary to destroy the oxide films 52d and 61d and to make many contact surfaces (ohmic points) between the tin plating layers 52c and 62c.

JP 2007-280825 A

  However, in the structure of the conventional example, in order to promote the destruction of the oxide films 52d and 61d, it is conceivable to increase the contact pressure between the contact portions. However, the terminals 51 and 60 are enlarged or complicated. There was a problem to do.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a contact connection structure capable of reducing contact resistance without increasing the size of a terminal or making it as complex as possible.

  In order to solve the above-mentioned problem, in the invention according to claim 1, the first contact portion having an indent portion projecting therefrom and a second contact portion are provided, and the indent portion of the first contact portion is the It slides on the contact surface of the second contact part, and at the terminal insertion completion position, the indent part is a contact connection structure in contact with the second contact part, and on the contact surface side of the first contact part, An oxide film removing portion is provided at a position where the second contact portion slides before the indent portion.

  According to a second aspect of the present invention, in the contact connection structure according to the first aspect, the oxide film removing portion is a protrusion.

  The invention according to claim 3 is the contact connection structure according to claim 1 or 2, wherein the indent portion has a top portion extending in a direction orthogonal to the terminal insertion direction, and the oxide film removal portion is in the terminal insertion direction. And a plurality of portions provided at intervals in the orthogonal direction.

  Invention of Claim 4 is the contact connection structure of any one of Claim 1 thru | or 3, Comprising: The said oxide film removal part is the both ends of the said 1st contact part of the orthogonal direction of a terminal insertion direction It has the part provided continuously over, It is characterized by the above-mentioned.

  A fifth aspect of the present invention is the contact connection structure according to any one of the first to fourth aspects, wherein the oxide film removing portion is recessed on the side opposite to the contact surface of the first contact portion. It has the corner | angular part of a recessed part, It is characterized by the above-mentioned.

  A sixth aspect of the present invention is the contact connection structure according to any one of the first to fifth aspects, wherein the oxide film removal portion is bent toward the contact surface side of the first contact portion. It has an end portion of a bent portion.

  According to the first aspect of the present invention, in the terminal sliding process, the oxide film removing portion on the contact surface side of the first contact portion removes the oxide film generated on the contact surface side of the second contact portion. Breakage of the film is promoted and contact with the plated surface is obtained. Further, the contact surface is divided by the removal of the oxide film, and a plurality of contact surfaces are formed. As described above, the contact resistance can be reduced without increasing the size of the terminal or making it as complex as possible.

  According to the second aspect of the present invention, in the terminal sliding process, the protrusion as the oxide film removing portion on the contact surface side of the first contact portion scrapes the oxide film generated on the contact surface side of the second contact portion. Therefore, the destruction of the oxide film is promoted and contact with the plated surface is obtained. Further, the contact surface is divided by the removal of the oxide film, and a plurality of contact surfaces are formed. As described above, the contact resistance can be reduced without increasing the size of the terminal or making it as complex as possible.

  According to the invention of claim 3, the same effect as that of claim 1 or 2 can be obtained.

  According to invention of Claim 4, it was produced | generated by the 2nd contact part in the whole contact surface of the 1st contact part by the part provided continuously over the both ends of the 1st contact part of an oxide film removal part. The oxide film can be removed, and the contact resistance between the indent portion and the second contact portion can be further reduced.

  According to the fifth aspect of the present invention, since the corner portion of the concave portion recessed on the opposite side to the contact surface of the first contact portion is used as the oxide film removing portion, the oxide film removing portion can be easily provided and complicated. Can be suppressed.

  According to the sixth aspect of the present invention, since the end of the bent portion that is bent toward the contact surface of the first contact portion is used as the oxide film removing portion, the oxide film removing portion can be easily provided and complicated. Can be suppressed.

It is sectional drawing of the female terminal and male terminal which show 1st Embodiment of this invention and does not connect a terminal. It is sectional drawing of the female terminal and male terminal of a terminal connection state which show 1st Embodiment of this invention. It is a perspective view of an elastic bending part which shows 1st Embodiment of this invention. 1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a side view of an elastic deflection portion and a tab portion before terminal connection, FIG. 2B is a side view of an elastic deflection portion and a tab portion in a terminal sliding process, and FIG. FIG. 4 is a side view of an elastic bending portion and a tab portion in a terminal connection state. The 1st Embodiment of this invention is shown, (a) is a principal part top view of a tab part, (b) is sectional drawing which follows the AA line of (a). The 2nd Embodiment of this invention is shown, (a) is a top view of an elastic bending part, (b) is sectional drawing in alignment with the BB line of (a), (c) is a perspective view of an elastic bending part. . 3A and 3B show a third embodiment of the present invention, in which FIG. 5A is a perspective view of an elastic deflection portion, and FIG. 5B is a cross-sectional view of an oxide film removal portion. 4A and 4B show a fourth embodiment of the present invention, in which FIG. 4A is a cross-sectional view of a female terminal, and FIG. 4B is a cross-sectional view of an oxide film removing unit. It is a sectional view of a female terminal and a male terminal before showing a conventional example and connecting a terminal. It is a sectional view of a female terminal and a male terminal in a terminal connected state, showing a conventional example. It is a principal part side view of a contact part which shows a prior art example. It is a block diagram which shows a prior art example and is a plating layer of a box part or a tab part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

[First Embodiment]
The contact connection structure of this embodiment is demonstrated using FIGS.

  As shown in FIG.1 and FIG.2, the female terminal 1 is arrange | positioned in the terminal accommodating chamber in the female side connector housing (not shown).

  The female terminal 1 is formed by bending a conductive metal (for example, copper alloy) punched into a predetermined shape, and has a box portion 2 that is a first contact portion.

  The box part 2 has a rectangular shape with an opening at the front. In the box part 2, an elastic bending part 3 bent from the upper surface part of the box part 2 is arranged.

  The elastic bending portion 3 is provided with an indent portion 4 protruding toward the bottom surface side.

  The indent portion 4 has a top portion 4a extending in a direction orthogonal to the terminal insertion direction, and is formed in a semi-cylindrical shape. The indent portion 4 can be shifted upward by the bending deformation of the elastic bending portion 3.

  The elastic deflecting portion 3 and the bottom surface portion 2a of the box portion 2 which is a fixed surface portion are arranged with an interval therebetween. A male terminal 10 is inserted between the elastic bending portion 3 and the bottom surface portion 2 a of the box portion 2.

  On the contact surface side of the elastic bending portion 3, a quadrangular pyramid-shaped protrusion 5 is provided at a position where a tab portion 11 described later slides before the indent portion 4. A plurality of, for example, three protrusions 5 are provided at intervals in a direction orthogonal to the terminal insertion direction.

  The protrusion 5 slides with the tab portion 11 before the tab portion 11 slides with the indent portion 4, and removes the oxide film 13 generated on the contact surface of the tab portion 11 described later. It has become. Hereinafter, the oxide film removing portion will be described as the protrusion 5.

  A conductive metal plating layer 6 is formed on the outer surface of the female terminal 1. An oxide film 7 is formed on the outer surface of the plating layer 6.

  The male terminal 10 is disposed in a terminal accommodating chamber in a male connector housing (not shown). The male terminal 10 is formed by bending a conductive metal (for example, copper alloy) punched into a predetermined shape, and has a tab portion 11 as a second contact portion.

  The tab portion 11 has a flat plate shape. A conductive metal plating layer 12 is formed on the outer surface of the male terminal 10. An oxide film 13 is formed on the outer surface of the plating layer 12.

  Next, the plating layer 12 of the tab portion 11 will be described. As shown in FIG. 5B, the plating layer 12 is formed on a copper alloy base material layer 12a.

  A copper / tin alloy layer 12b and a tin plating layer 12c are formed on the outer surface side of the base layer 12a of the copper alloy material, and an oxide film 13 is formed on the outer surface of the tin plating layer 12c. Moreover, the plating layer 6 of the elastic bending part 3 is also comprised similarly.

  In the above configuration, when the female connector housing (not shown) and the male connector housing (not shown) are fitted, the tab portion 11 of the male terminal 10 is connected to the box portion 2 of the female terminal 1 in the fitting process. Inserted.

  Then, first, as shown in FIG. 4A, the tip of the tab portion 11 approaches the elastic bending portion 3. Thereafter, as shown in FIG. 4B, the tip of the tab portion 11 abuts on the elastic bending portion 3, and the protrusion 5 on the contact surface side of the elastic bending portion 3 slides on the contact surface of the tab portion 11. As a result, the oxide film 13 generated on the contact surface side of the tab portion 11 is scraped to form a V-shaped groove 14 along the insertion direction of the male terminal 10, and the tin plating layer 12c of the plating surface 12 is exposed. To do.

  Next, when the insertion of the tab portion 11 further proceeds from this contact portion, the top portion 4a of the indent portion 4 slides on the contact surface of the tab portion 11 as shown in FIG. Is deformed and insertion of the tab portion 11 is allowed.

  In the insertion process of the tab part 11, the indent part 4 contacts the contact part 11a of the tab part 11, and reaches a terminal insertion completion position (refer FIG. 2, FIG. 3).

  As described above, in the contact connection structure of the present embodiment, the protrusion 5 functions as the oxide film removing portion, so that the protrusion 5 on the contact surface side of the elastic bending portion 3 is the tab portion in the terminal sliding process. As shown in FIGS. 5A and 5B, destruction of the oxide film 13 is promoted and contact between the plating layer 12 and the tin plating layer 12c is obtained. It is done.

  Further, the contact surface is divided by the removal of the oxide film 13 to form a plurality of contact surfaces. As described above, the contact resistance can be reduced without increasing the size of the female terminal 1 or the male terminal 10 or making it as complex as possible.

  In the present embodiment, the contact surface is divided at a plurality of locations by scraping the oxide film 13 on the surface of the tab portion 11 with a plurality of protrusions 5 provided at intervals in the direction orthogonal to the terminal insertion direction. Many contact surfaces can be obtained reliably.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, description is abbreviate | omitted about the structure similar to 1st Embodiment. In the present embodiment, a protrusion 9 described later functions as an oxide film removing unit.

  As shown in FIGS. 6A, 6 </ b> B, and 6 </ b> C, in the contact connection structure of the present embodiment, an indent portion 8 is formed on the contact surface side of the elastic deflecting portion 3, and a tab portion 11. Is different from the first embodiment in that the protrusion 9 is provided at a position where the protrusion 9 slides before the indent 8.

  The indented portion 8 has a substantially spherical outer peripheral surface, and the center vertex is located at the lowest position.

  The protrusion 9 is formed in a semi-cylindrical shape, and the apex is located at the lowest position. In addition, the outer diameter of the protrusion 9 is set smaller than the outer diameter of the indent 8.

  Also in the second embodiment, as in the first embodiment described above, the protrusion 9 on the contact surface side of the elastic deflecting portion 3 functions as an oxide film removing portion in the terminal sliding process, whereby the tab portion 11. Since the oxide film 13 formed on the surface of the film is cut away, the destruction of the oxide film 13 is promoted, and the contact of the plating layer 12 with the tin plating layer 12c is obtained.

  Further, the contact surface is divided by the removal of the oxide film 13 to form a plurality of contact surfaces. As described above, the contact resistance can be reduced without increasing the size of the female terminal 1 or the male terminal 10 or making it as complex as possible.

[Third Embodiment]
A third embodiment of the present invention will be described with reference to FIG. In addition, description is abbreviate | omitted about the structure similar to other embodiment. In the present embodiment, a protrusion 15 described later functions as an oxide film removing unit.

  In the contact connection structure according to the present embodiment, the protrusion 15 is continuously provided across both ends of the elastic bending portion 3 of the box portion 2 which is the first contact portion in the direction orthogonal to the terminal insertion direction.

  Further, the protrusion 15 has a corner 19 of a recess 17 that is recessed on the side opposite to the contact surface of the elastic bending portion 3.

  As shown in FIG. 7, the protrusion 15 is provided continuously across both end portions in the width direction of the elastic deflection portion 3 orthogonal to the insertion direction of the tab portion 11.

  The protrusion 15 is a corner 19 of a recess 17 that is recessed toward the side opposite to the contact surface of the elastic bending portion 3, that is, the side opposite to the protruding direction of the top 4 a of the indent portion 4.

  In such a protrusion 15, when the tab portion 11 is inserted into the box portion 2, the corner portion 19 of the recess 17 slides on the contact surface of the tab portion 11 and is generated on the contact surface side of the tab portion 11. The oxidized film 13 is removed, and the tin plating layer 12c on the plating surface 12 is exposed.

  At this time, since the protrusion 15 (the corner 19 of the recess 17) is provided across the width direction of the elastic deflection portion 3, the entire area in the width direction of the elastic deflection portion 3 is generated on the contact surface of the tab portion 11. The oxidized film 13 is shaved.

  For this reason, whatever shape the indent portion is (for example, the indent portion 4 shown in the first embodiment or the indent portion 8 shown in the second embodiment), the indent portion is the tin plating layer of the plating surface 12. 12c can contact the exposed contact surface of the tab portion 11.

  In the third embodiment as well, in the terminal sliding process, the protrusion 15 on the contact surface side of the elastic deflecting portion 3 functions as an oxide film removing portion in the terminal sliding process. Since the oxide film 13 generated on the surface is cut, the destruction of the oxide film 13 is promoted, and the contact of the plating layer 12 with the tin plating layer 12c is obtained.

  Further, since the protrusion 15 is provided continuously across both ends of the elastic bending portion 3 in the direction orthogonal to the terminal insertion direction, the oxide film generated on the tab portion 11 over the entire contact surface of the elastic bending portion 3. 13, the contact resistance between the indented portion 4 and the tab portion 11 can be further reduced.

  Furthermore, since the protrusion 15 is the corner portion 19 of the recess 17 that is recessed on the opposite side to the contact surface of the tab portion 11, the protrusion 15 can be easily provided, and complication can be suppressed. As described above, the contact resistance can be reduced without increasing the size of the female terminal 1 or the male terminal 10 or making it as complex as possible.

[Fourth Embodiment]
A fourth embodiment of the present invention will be described with reference to FIG. In addition, description is abbreviate | omitted about the structure similar to other embodiment. In the present embodiment, a protrusion 21 described later functions as an oxide film removing unit.

  In the contact connection structure according to the present embodiment, the protrusion 21 has an end portion 27 of a bent portion 25 that is bent toward the contact surface side of the elastic deflecting portion 23 of the box portion 2 that is the first contact portion. .

  Here, as shown in FIG. 8, in the contact connection structure according to the present embodiment, the elastic bending portion 23 is formed by cutting and raising the bottom wall of the box portion 2 toward the upper wall side.

  An indent portion 29 that protrudes toward the upper surface side is provided on the upper surface side that is a contact surface of the elastic bending portion 23. The indented portion 29 may have any shape such as a semi-cylindrical shape or a hemispherical shape.

  When the tab portion 11 is inserted between the upper wall of the box portion 2 and the contact surface of the elastic deflecting portion 23, the indent portion 29 changes downward due to the deformation of the elastic deflecting portion 23.

  The elastic deflecting portion 23 provided with such an indented portion 29 is provided with a protruding portion 21 at a position where the tab portion 11 slides before the indented portion 29.

  As shown in FIG. 8, the protruding portion 21 becomes an end portion 27 of the bent portion 25 in which the free end of the elastic deflecting portion 23 is bent toward the contact surface side, that is, in the same direction as the protruding direction of the indented portion 29. ing.

  In addition, the protrusion 21 is provided continuously across both ends in the width direction of the elastic deflection portion 23 orthogonal to the insertion direction of the tab portion 11.

  In the protrusion 21, when the tab portion 11 is inserted into the box portion 2, the end portion 27 of the bent portion 25 slides on the contact surface of the tab portion 11 and is generated on the contact surface side of the tab portion 11. The oxidized film 13 is removed, and the tin plating layer 12c on the plating surface 12 is exposed.

  In the fourth embodiment as well, in the terminal sliding process, the protrusion 21 on the contact surface side of the elastic bending portion 3 functions as an oxide film removing portion in the terminal sliding process. Since the oxide film 13 generated on the surface is cut, the destruction of the oxide film 13 is promoted, and the contact of the plating layer 12 with the tin plating layer 12c is obtained.

  Further, since the protrusion 21 is the end portion 27 of the bent portion 25 that is bent with the free end side of the elastic deflecting portion 23 facing the contact surface side, the protrusion 21 can be easily provided and complicated. Can be suppressed. As described above, the contact resistance can be reduced without increasing the size of the female terminal 1 or the male terminal 10 or making it as complex as possible.

  In the first embodiment, the quadrangular pyramidal protrusion 5 is provided, and in the second embodiment, the semi-cylindrical protrusion 9 is provided. However, the present invention is not limited to this, and the protrusion is indented. Any shape may be used as long as the outer diameter is set smaller than the portion.

  Further, it is possible to improve the friction coefficient by providing a fine uneven portion on the surface of the protrusion. Thus, the oxide film of the plating layer can be rubbed strongly with the protrusion, so that the oxide film can be more reliably destroyed.

  Furthermore, in 3rd, 4th embodiment, although the protrusion is continuously provided over the both ends of the 1st contact part of the orthogonal direction with respect to a terminal insertion direction, this invention is not limited to this, The corner of a recessed part A plurality of ends and bent portions may be provided at intervals in the direction orthogonal to the terminal insertion direction.

  Further, in the first and second embodiments, a plurality of protrusions as oxide film removing portions are provided at intervals in the direction orthogonal to the terminal insertion direction. In the third and fourth embodiments, the protrusion is orthogonal to the terminal insertion direction. Although it was only provided continuously over the both ends of the 1st contact part of a direction, this invention is not limited to this.

  For example, at a position where the second contact portion on the contact surface side of the first contact portion slides ahead of the indent portion, first, a plurality of oxide film removal portions provided at intervals in the direction orthogonal to the terminal insertion direction are provided. Oxide film removal along the direction orthogonal to the terminal insertion direction, such as providing one row, and then providing one row of oxide film removal portions provided continuously across both ends of the first contact portion in the direction orthogonal to the terminal insertion direction The portions may be arranged in a plurality of rows in the terminal insertion direction to form an oxide film removal portion as a whole.

  Further, the protrusion functioning as the oxide film removing portion may not be constituted by only a quadrangular pyramidal protrusion, only a semi-cylindrical protrusion, only a corner of a recess, or only an end of a bent portion. If the second contact portion is in a position where the second contact portion slides before the indent portion on the contact surface side of the one contact portion, for example, a protrusion is constituted by a quadrangular pyramid-like protrusion and an end of the bent portion. For example, the protrusion may be configured by a plurality of combinations.

  In addition, the oxide film removal portion is a protrusion, but is not limited thereto. For example, the same kind of metal as the metal mixed in the plating layer of the second contact portion is included in the plating layer of the first contact portion. The portion may be mixed and the oxide film may be removed by the bonding force of the metal-to-metal bond, and any structure may be used as long as the oxide film can be removed.

1 Female terminal (1st terminal)
2 Box part (first contact part)
3, 23 Elastic deflection part (first contact part)
4, 8, 29 Indent 4a Top 5, 9, 15, 21 Protrusion (oxide removal part)
10 Male terminal (second terminal)
11 Tab part (second contact part)
12 Plating layer 13 Oxide film 17 Concave part 19 Corner part 25 Bending part 27 End part

Claims (6)

A first contact portion with a projecting indent, and a second contact portion;
The indented portion of the first contact portion slides on the contact surface of the second contact portion;
In the terminal insertion completion position, the indent portion is a contact connection structure in contact with the second contact portion,
A contact connection structure, characterized in that an oxide film removing portion is provided on the contact surface side of the first contact portion at a position where the second contact portion slides before the indent portion. The contact connection structure according to claim 1,
The contact connection structure, wherein the oxide film removing portion is a protrusion. The contact connection structure according to claim 1 or 2,
The indent portion has a top portion extending in a direction orthogonal to the terminal insertion direction,
2. The contact connection structure according to claim 1, wherein the oxide film removing section includes a plurality of portions provided at intervals in a direction orthogonal to the terminal insertion direction. The contact connection structure according to any one of claims 1 to 3,
The said oxide film removal part has a part provided continuously over the both ends of the said 1st contact part of the orthogonal direction of a terminal insertion direction, The contact connection structure characterized by the above-mentioned. The contact connection structure according to any one of claims 1 to 4,
The contact connection structure according to claim 1, wherein the oxide film removing portion has a concave corner that is recessed on the opposite side of the contact surface of the first contact portion. The contact connection structure according to any one of claims 1 to 5,
The contact connection structure according to claim 1, wherein the oxide film removing portion has an end portion of a bent portion that is bent toward a contact surface side of the first contact portion.

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