JP2013218848A - Connector terminal for press fit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector terminal for press fit having excellent contact reliability, and capable of reducing the amount of raw material used.SOLUTION: A connector terminal for press fit 100 comprises: a connection part 101 formed by processing a substantially strip metal plate having elasticity and being inserted into the through hole of a printed circuit board; a pin 102 provided on the opposite side of the connection part 101; and a shoulder 103 provided between the connection part 101 and the pin 102. Substantially hemispherical swollen parts 11, 12 are formed by press drawing two parts of a metal plate closer to the tip side than the pin 102 and shoulder 103, and the metal plate is folded at a folding part 13 located between the swollen parts 11, 12 so that the concave surfaces thereof face each other, thus forming the connection part 101. The swollen parts 11, 12 are provided, respectively, with apertures 11b, 12b penetrating the metal plate.

Description

  The present invention relates to a press-fit connector terminal used by being inserted into a conductive through hole of a printed circuit board.

  Conventionally, there are various types of press-fit connector terminals such as a needle eye, C-type, N-type, and Σ-type in cross-section of the terminal contact portion. “Press-fit terminals” are available.

  The “press-fit terminal” described in Patent Document 1 is composed of a press-fit portion, a terminal base portion, and a male terminal portion. The press-fit portion is a contact portion formed in a shape that can be easily contacted with a through hole, and an elastic body. It is comprised from the formed press part. A pressing portion is fitted into the opening of the contact portion, and the pressing portion applies an elastic force to the contact portion so as to press the contact portion against the through hole.

  In the “press-fit terminal” described in Patent Document 1, a metal plate on which a contact portion and a contact portion are formed with a bent portion interposed therebetween is bent at the bent portion, and the metal plate on the right side of the bent portion is changed to the left metal plate. It is formed by processing so as to overlap.

JP 2007-157469 A

  In the “press-fit terminal” described in Patent Document 1, a region in which a press-fit portion (contact portion and pressing portion), a terminal base portion, a male terminal portion, and the like are formed on the metal plate in a stage before the bending process in the bending portion. However, the area where the press-fit part (contact part and pressing part) is formed needs to secure a wider width of the metal plate than the area where the terminal base part is formed. The amount increases.

  In addition, when the press-fit part of this “press-fit terminal” is inserted into the through hole of the printed circuit board, the pressing force to the through hole is obtained only by the elastic behavior of the pressing part with respect to the contact part. There is a case where a part lacking is generated and the contact reliability is inferior.

  In addition, since the “press-fit terminal” has a contact portion and a pressing portion formed in parallel with the through-hole (contacts at the straight portion), the press-fit terminal is pushed into the through-hole when it is squeezed. Pressure may change and contact may become unstable.

  The problem to be solved by the present invention is to provide a press-fit connector terminal that has excellent contact reliability and can reduce the amount of raw materials used.

  The connector terminal for press-fit according to the present invention is formed by processing one substantially strip-shaped metal plate having elasticity, and the contact portion inserted into the conductive through hole of the printed circuit board, and the contact A press-fit connector terminal having a pin portion provided on the opposite side of the portion, and forming a substantially hemispherical bulged portion by drawing at two locations near the tip of the metal plate And the said contact part was formed by bending the said metal plate in the position between the said bulging parts, and making the concave curved surfaces of the said bulging part oppose.

  With such a configuration, the contact portion formed by making the concave curved surfaces of the two bulging portions face each other is in a state in which the convex curved surface side of the two bulging portions faces the outer periphery, respectively. When the contact portion is inserted into the through hole, the convex curved surface sides of the two bulge portions positioned at an interval of 180 degrees contact the inner peripheral surface of the through hole, respectively, and elastically deform in the direction in which the bulge portion is dented to the through hole. Therefore, excellent contact reliability can be obtained.

  In addition, since the two bulging portions are formed by drawing each, it is not necessary to secure the width of the region where the two bulging portions are formed wider than the width of the other region in the raw metal plate. The amount of raw materials used can be reduced. Furthermore, when a substantially strip-shaped metal plate as a raw material for one press-fit connector terminal is formed by punching from a wide metal plate material, the substantially strip-shaped metal plate having a uniform lateral width is formed on the metal plate material. Since punching can be performed in a state of being arranged at a narrow pitch, the number of punches per metal material can be increased, which is effective in reducing the amount of raw materials used.

  Here, it is desirable to provide an opening through the metal plate in the bulging portion. With such a configuration, when the contact portion is inserted into the through hole of the printed circuit board, the bulged portion is easily elastically deformed, which is effective in improving contact reliability.

  Further, an auxiliary opening is formed in the facing region by providing a bay-shaped notch in each of the side edges located in the facing region between the side edges of the metal plate forming the bulging portion. You can also.

  With such a configuration, when the contact portion is inserted into the through hole of the printed circuit board, the auxiliary opening functions as a clearance when the bulging portion elastically deforms, so that the elastic deformability increases, Effective for improving contact reliability.

  On the other hand, a shoulder portion in which the size of the metal plate in the plate width direction or the plate thickness direction is larger than the bulge portion may be provided between the contact portion and the pin portion. With such a configuration, when the contact portion is inserted into the through hole of the printed circuit board, the shoulder portion can be inserted with a pressing force, so that the insertion workability is improved.

  The present invention provides a press-fit connector terminal that is excellent in contact reliability and can reduce the amount of raw materials used.

It is a perspective view which shows the connector terminal for press fits which is 1st Embodiment of this invention. It is the perspective view which looked at the connector terminal for press fits shown in FIG. 1 from the different angle. It is the partially expanded view seen from the arrow A direction in FIG. It is the partially expanded view seen from the arrow B direction in FIG. It is the enlarged view seen from the arrow C direction in FIG. It is sectional drawing in the DD line in FIG. FIG. 6 is a partially omitted cross-sectional view taken along line EE in FIG. 5. It is sectional drawing before inserting the connector terminal for press fits shown in FIG. 1 in the through hole of a printed circuit board. It is sectional drawing after inserting the connector terminal for press fits shown in FIG. 1 in the through hole of a printed circuit board. (A) is a perspective view of the vicinity of the contact portion before inserting the press-fit connector terminal shown in FIG. 1 into the through hole of the printed circuit board, and (b) is a perspective view of the vicinity of the contact portion after insertion. . It is a figure which shows the state after giving a press drawing process to the metal plate which is the raw material of the connector terminal for press fits shown in FIG. 1, and before performing a bending process. It is the figure seen from the arrow F direction in FIG. It is a perspective view which shows the connector terminal for press fits which is 2nd Embodiment of this invention. It is the perspective view which looked at the connector terminal for press fits shown in FIG. 13 from the different angle. It is the partially expanded view seen from the arrow G direction in FIG. It is the partially expanded view seen from the arrow H direction in FIG. It is the partially expanded view seen from the arrow I direction in FIG. It is sectional drawing in the JJ line | wire in FIG. FIG. 18 is a partially omitted cross-sectional view taken along the line KK in FIG. 17.

  A press-fit connector terminal 100 according to the first embodiment of the present invention will be described with reference to FIGS. One press-fit connector terminal 100 shown in FIG. 1 and FIG. 2 is formed by processing one substantially strip-shaped metal plate 10 (see FIG. 11 and FIG. 12) having elasticity. 9, the contact portion 101 inserted into the conductive through hole 91 of the printed circuit board 90, the pin portion 102 provided on the opposite side of the contact portion 101, the contact portion 101 and the pin portion 102. And a shoulder portion 103 provided between the two.

  The size of the metal plate 10 of the shoulder portion 103 in the plate width direction 10w is larger than the size of the bulging portions 11 and 12 in the plate width direction 10w. A plurality of press-fit locking portions 14 having a wedge shape project from both side edges of a portion of the pin portion 102 near the shoulder portion 103. When an electrical connector (not shown) is formed by press-fitting the pin portions 102 of the plurality of press-fit connector terminals 100 into press-fitting holes of a housing (not shown) made of an insulating resin, a plurality of press-fit locking portions 14 digs into the inner peripheral surface of the press-fitting hole (not shown) and exhibits a locking action.

  The metal plate 10 is subjected to press drawing at two locations on the tip side from the pin portion 102 and the shoulder portion 103 to form substantially hemispherical bulging portions 11 and 12 (see FIGS. 11 and 12). The contact portion 101 is formed by bending 10 at a folded portion 13 located between the bulging portions 11 and 12 so that the concave curved surfaces 11a and 12a of the bulging portions 11 and 12 face each other. The bulging portions 11 and 12 are provided with openings 11b and 12b penetrating the metal plate 10, respectively.

  By providing bay-shaped notches 11c and 12c at the side edges located in the opposing areas of the side edges of the metal plate 10 forming the bulging parts 11 and 12, respectively, the auxiliary openings 15 are formed in the opposing areas. Is formed.

  In the press-fit connector terminal 100, the contact portion 101 formed by making the concave curved surfaces 11a and 12a of the two bulging portions 11 and 12 face each other has the convex curved surfaces 11d and 12d side of the two bulging portions on the outer periphery, respectively. As a whole, it has a generally football shape. Therefore, as shown in FIGS. 8 and 9, when the contact portion 101 is inserted into the through hole 91 (through hole plating 92 is provided on the inner peripheral surface) of the printed circuit board 90, the printed circuit board 90 is positioned at an interval of 180 degrees. When the convex curved surfaces 11d and 12d side of the two bulging portions 11 and 12 contact the inner peripheral surface of the through hole 91, the bulging portions 11 and 12 are elastically deformed in the direction in which they dent, respectively, and Because it generates a pressing force, it exhibits excellent contact reliability.

  Here, the deformation state of the bulging portions 11 and 12 when the contact portion 101 is inserted into the through hole 91 will be described with reference to FIG. In addition, since the bulging parts 11 and 12 are arrange | positioned symmetrically and the deformation | transformation state is also the same, only one bulging part 12 is demonstrated and description of the other bulging part 11 is abbreviate | omitted.

  The bulging portion 12 before the contact portion 101 is inserted into the through hole 91 remains in the state when drawn as shown in FIG. 10A, but the contact portion 101 goes to the through hole 91. When inserted, as shown in FIG. 10 (b), the vicinity of the top of the convex curved surface 12d is elastically deformed in the concave direction by contacting the inner peripheral surface of the through hole 91, and is corrected to its inner diameter size. Become. At this time, the contact portion 101 slightly extends toward the distal end side (folded portion 13 side). As a result, an elastic restoring force is generated in the bulging portion 12 so as to return to the original state. By this elastic restoring force, the vicinity of the top of the convex curved surface 12d presses the inner peripheral surface of the through-hole 91, so Since the pressure is exerted, excellent contact reliability can be obtained.

  Moreover, since the opening part 12b which penetrates the metal plate 10 is opened in the bulging part 12, when the contact part 101 is inserted in the through hole 91, the bulging part 12 is easily elastically deformed, and the contact reliability. It is effective in improving Further, when the contact portion 101 is inserted into the through hole 91, the auxiliary opening portion 15 functions as a clearance when the bulging portion 12 is elastically deformed, so that the elastic deformability is increased and effective in improving the contact reliability. It is.

  Further, since the two bulging portions 11 and 12 are formed by drawing, respectively, as shown in FIGS. 11 and 12, the two bulging portions 11 and 12 are formed in the metal plate 10 as a raw material. It is not necessary to secure the width of the area to be wider than the width of other areas, and the amount of raw materials used can be reduced. Furthermore, when the substantially strip-shaped metal plate 10 that is a raw material of one press-fit connector terminal 100 is formed by punching from a wide metal plate material, the substantially strip-shaped metal plate 10 having a uniform lateral width is Since punching can be performed in a state in which the metal plates are arranged at a narrow pitch, the number of punches per one metal material can be increased, which is effective in reducing the amount of raw materials used.

  The pin portion 102 needs to have a predetermined plate thickness in order to maintain strength. However, the bulge portion forming region of the metal plate 10 is reduced after the plate thickness is reduced (thinned) by pressing. The bulging portions 11 and 12 can be formed by processing. In the present embodiment, since the bulging portion forming region of the metal plate 10 is pressed twice to reduce the thickness, the first step portion 17 and the second step portion 18 are formed as shown in FIG. Although it is formed, the present invention is not limited to this, and it is possible to reduce the thickness by performing press processing once or three times or more.

  On the other hand, in the press-fit connector terminal 100, a shoulder portion 103 having a size in the plate width direction 10 w of the metal plate 10 larger than the bulging portions 11 and 12 is provided between the contact portion 101 and the pin portion 102. For this reason, when the contact portion 101 is inserted into the through hole 91 of the printed circuit board 90, the shoulder portion 103 can be inserted with a pressing force, so that the insertion workability is improved.

  Next, based on FIGS. 13-19, the connector terminal 200 for press fits which is 2nd Embodiment of this invention is demonstrated. In the press-fit connector terminal 200, portions common to the components of the press-fit connector terminal 100 described above are denoted by the same reference numerals as in FIGS.

  In the press-fit connector terminal 100 shown in FIGS. 1, 2, etc., the auxiliary opening 15 is provided in the contact portion 101, but the auxiliary opening portion is provided in the contact portion 201 of the press-fit connector terminal 200. They are different in that there is no point. That is, in the contact portion 201 of the connector terminal 200 for press-fit, there is no auxiliary opening in the opposing region between the side edges of the bulging portions 11 and 12, and the bulging portions 11 and 12 are formed by drawing. There is only a gap 20 (see FIGS. 16 and 19) resulting from the slight deformation of the both side edges of the metal plate when formed. Other structures and functions are the same as those of the press-fit connector terminal 100.

  With such a configuration, in the press-fit connector terminal 200, the contact pressure to the through hole 91 by the contact portion 201 can be increased. Moreover, the press work process can be reduced.

  The press-fit connector terminals 100 and 200 described above exemplify the press-fit connector terminals of the present invention, and the present invention is not limited to the press-fit connector terminals 100 and 200.

  The press-fit connector terminal according to the present invention can be widely used in fields such as the electrical / electronic equipment industry and the automobile industry as a member for electrical connection by being inserted into a through hole of a printed circuit board. .

DESCRIPTION OF SYMBOLS 10 Metal plate 10w Plate width direction 11,12 Swelling part 11a, 12a Concave surface 11b, 12b Opening part 11c, 12c Notch part 11d, 12d Convex surface 13 Folding part 14 Press-fit locking part 15 Auxiliary opening part 17 1st level | step difference Part 18 Second step part 20 Clearance 90 Printed circuit board 91 Through hole 92 Through hole plating 100, 200 Connector terminal for press-fit 101, 201 Contact part 102 Pin part 103 Shoulder part

The connector terminal for press-fit according to the present invention is formed by processing one substantially strip-shaped metal plate having elasticity, and the contact portion inserted into the conductive through hole of the printed circuit board, and the contact A press-fit connector terminal having a pin portion provided on the opposite side of the metal plate, and press-drawing at two locations near the tip of the metal plate to form a substantially hemispherical bulge portion. Forming the contact portion by bending the metal plate at a position between the bulging portions and causing the concave curved surfaces of the bulging portions to face each other, and an opening penetrating the metal plate in the bulging portion A feature is provided .

Here, since the bulging portion is provided with an opening that penetrates the metal plate, the bulging portion is easily elastically deformed when the contact portion is inserted into the through hole of the printed circuit board. It is effective in improving

Claims (4)

  A contact portion that is formed by processing one elastic band-shaped metal plate having elasticity, and is inserted into a conductive through hole of a printed circuit board, and a pin portion provided on the opposite side of the contact portion A press-fit connector terminal provided with press-drawing at two locations near the tip of the metal plate to form a substantially hemispherical bulge, A connector terminal for press-fit, wherein the contact portion is formed by bending at a position between the portions and causing the concave curved surfaces of the bulging portions to face each other.   The press-fit connector terminal according to claim 1, wherein an opening that penetrates the metal plate is provided in the bulging portion.   The auxiliary opening part was formed in the said opposing area | region by providing a bay-like notch in each of the said side edge part located in the opposing area | region of the side edges of the metal plate which forms the said bulging part. Or the connector terminal for press-fit of 2.   The press fit according to any one of claims 1 to 3, wherein a shoulder portion having a size in a plate width direction or a plate thickness direction of the metal plate larger than the bulging portion is provided between the contact portion and the pin portion. Connector terminal.

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