阅读说明：本技术 压配合端子以及带端子基板 (Press-fit terminal and substrate with terminal ) 是由 吉田大晟 于 2019-12-26 设计创作，主要内容包括：本发明提供能够抑制对基板施加过大的力的压配合端子。压配合端子(1)具备：一对压入部(60a、60b),两者夹持沿着向基板(20)的通孔(23)插入的插入方向(X)的轴心(Xt)而在与该插入方向正交的正交方向(第1正交方向(Y))位于对置位置并且沿着所述插入方向被压入到通孔中,以及可塑性部(5),其位于该一对压入部之间并且具有允许该一对压入部向该正交方向的内侧变形的贯通孔(8)。可塑性部具备刚体部(52),其位于贯通孔的插入方向(X)的与前端侧相反侧的基端并且一对压入部在可塑性部相交。刚体部在正交方向的外表面具备朝向轴心(Xt)凹状地弯曲而形成的弯曲凹部(521a、521b)。(The invention provides a press-fit terminal capable of restraining excessive force applied to a substrate. A press-fit terminal (1) is provided with: a pair of press-fitting sections (60a, 60b) that are positioned at opposing positions in an orthogonal direction (1 st orthogonal direction (Y)) orthogonal to an insertion direction (X) along an axis (Xt) of the insertion direction (X) into the through hole (23) of the substrate (20) and that are pressed into the through hole along the insertion direction, and a plastic section (5) that is positioned between the pair of press-fitting sections and that has a through hole (8) that allows the pair of press-fitting sections to deform inward in the orthogonal direction. The plastic part is provided with a rigid body part (52) which is positioned at the base end opposite to the front end side in the insertion direction (X) of the through hole and a pair of press-in parts are crossed at the plastic part. The rigid body portion has curved recesses (521a, 521b) formed by concavely curving toward the axis (Xt) on the outer surface in the orthogonal direction.)

1. A press-fit terminal is provided with:

a pair of press-fitting portions that are pressed into the through hole along an insertion direction of the through hole of the substrate while sandwiching an axis along the insertion direction and are located at opposing positions in an orthogonal direction orthogonal to the insertion direction; and

a plastic part located between the pair of press-fitting parts and having a through hole for allowing the pair of press-fitting parts to deform inward in the orthogonal direction,

the plastic portion includes a rigid body portion located at a base end of the through hole on an opposite side to a tip end side in the insertion direction, and the pair of press-fitting portions intersect at the rigid body portion,

the rigid body portion has a curved concave portion formed by concavely curving toward the axis on an outer surface in the orthogonal direction.

2. The press-fit terminal according to claim 1,

the pair of press-fitting portions each have inner wall surfaces located on the through hole side in the orthogonal direction and facing each other,

the inner wall surface has a curved convex portion formed by convexly curving toward the axis center at an end portion of the rigid body portion in the insertion direction.

3. A substrate with a terminal is provided with:

a substrate having a through hole; and

a press-fit terminal pressed into the through-hole,

the press-fit terminal includes: a pair of press-fitting portions that are pressed into the through hole along the insertion direction, the pair of press-fitting portions being located at opposing positions in an orthogonal direction orthogonal to the insertion direction along an axial center of the through hole with respect to the insertion direction; and a plastic part which is located between the pair of press-fitting parts and has a through hole for allowing the pair of press-fitting parts to deform inward in the orthogonal direction,

the plastic portion includes a rigid body portion located at a base end of the through hole on an opposite side to a tip end side in the insertion direction, and the pair of press-fitting portions intersect at the rigid body portion,

the rigid body portion has a curved concave portion formed by concavely curving toward the axis on an outer surface in the orthogonal direction,

a space created by the curved recess is formed between an inner peripheral surface of the through hole of the substrate and an outer surface of the rigid body portion.

Technical Field

The invention relates to a press-fit terminal and a substrate with a terminal.

Background

As a conventional press-fit terminal, for example, patent document 1 discloses a press-fit terminal having the following structure. The press-fit terminal includes: a terminal base portion fixed by being press-fitted into a press-fitting hole provided in the connector housing; and an elastic deformation portion extending from the terminal base portion to the circuit substrate. The elastic deformation part is provided with an elastic deformation foot, and a slit and an auxiliary slit are formed around the elastic deformation foot. The auxiliary slit further moves the flexibly deformed fixed end downward by expanding a deformation space downward from the lower end of the slit. The elastically deformable leg includes a tapered portion including a straight line at a part of an outer edge, and the tapered portion contacts an opening edge of the press-in hole at the start of insertion.

Disclosure of Invention

Technical problem to be solved by the invention

However, the press-fit terminal described above has room for improvement in terms of suppressing application of excessive force to the substrate.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a press-fit terminal and a terminal-equipped substrate capable of suppressing application of an excessive force to the substrate.

Means for solving the problems

In order to solve the above problem, a press-fit terminal according to the present invention includes: a pair of press-fitting portions that are pressed into the through hole along an insertion direction of the through hole of the substrate while sandwiching an axis along the insertion direction and are located at opposing positions in an orthogonal direction orthogonal to the insertion direction; and a plastic portion that is located between the pair of press-fitting portions and has a through hole that allows the pair of press-fitting portions to deform inward in the orthogonal direction, the plastic portion including a rigid body portion that is located at a base end of the through hole on the opposite side to the tip end side in the insertion direction, the pair of press-fitting portions intersecting with each other at the rigid body portion, and an outer surface of the rigid body portion in the orthogonal direction having a curved concave portion that is formed by concavely curving toward the axis center.

In the press-fit terminal, it is preferable that the pair of press-fitting portions have inner wall surfaces located on the through hole side in the orthogonal direction and facing each other, and the inner wall surfaces have curved convex portions formed by convexly curving toward the axis center at an end portion of the rigid body portion in the insertion direction.

In order to solve the above problem, a substrate with a terminal according to the present invention includes: a substrate having a through hole; and a press-fit terminal pressed into the through-hole, the press-fit terminal including: a pair of press-fitting portions that are pressed into the through hole along the insertion direction, the pair of press-fitting portions being located at opposing positions in an orthogonal direction orthogonal to the insertion direction along an axial center of the through hole with respect to the insertion direction; and a plastic portion that is located between the pair of press-fitting portions and has a through hole that allows the pair of press-fitting portions to deform inward in the orthogonal direction, the plastic portion including a rigid body portion that is located at a base end of the through hole on the opposite side to the tip end side in the insertion direction, the pair of press-fitting portions intersecting with each other at the rigid body portion, an outer surface of the rigid body portion in the orthogonal direction having a curved concave portion that is concavely curved toward the axis, and a space created by the curved concave portion being formed between an inner peripheral surface of the through hole of the substrate and an outer surface of the rigid body portion.

Effects of the invention

The press-fit terminal and the substrate with a terminal according to the present invention have the following configurations. The rigid body portion has a curved concave portion formed by concavely curving toward the axis at an outer surface in the orthogonal direction. The press-fit terminal can form a space between the outer surface of the rigid body portion and the inner peripheral surface of the through hole by the curved recessed portion, and therefore contact between the outer surface of the rigid body portion and the inner peripheral surface of the through hole can be prevented. Thus, the press-fit terminal can suppress application of an excessive force to the substrate due to contact between the outer surface of the rigid body portion and the inner peripheral surface of the through hole.

Drawings

Fig. 1 is a front view of a press-fit terminal according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG. 1.

Fig. 3 is a partially enlarged view of the moldable portion of the press-fit terminal.

Fig. 4 is a front view showing a state where the moldable part of the press-fit terminal is pressed into the through hole of the substrate.

Fig. 5 is a sectional view looking in the direction IV-IV of fig. 4.

Description of the symbols

1: press-fit terminal

2: substrate with terminal

20: substrate

23: through hole

5: plastic part

52: rigid body part

521 a: curved recess

521 b: curved recess

52 e: outer surface

52 f: outer surface

524 a: curved convex part

524 b: curved convex part

60 a: pressing-in part

60 b: pressing-in part

61 a: inner wall surface

61 b: inner wall surface

8: through hole

S1: space(s)

S2: space(s)

X: direction of insertion

Xt: axial center

Y: 1 st orthogonal direction (orthogonal direction)

Detailed Description

Embodiments of a press-fit terminal and a terminal-equipped board according to the present invention will be described below with reference to the drawings. The invention is not limited to the embodiment.

Fig. 1 is a front view of a press-fit terminal according to the present invention. FIG. 2 is a sectional view taken along line II-II of FIG. 1. Fig. 3 is a partially enlarged view of the press-fit terminal. Fig. 4 is a front view showing a state in which a moldable portion (japanese: コンプライアント portion) of the press-fit terminal is pressed into a through-hole of the substrate. Fig. 5 is a sectional view looking in the direction IV-IV of fig. 4.

As shown in fig. 1, the X direction is an insertion direction in which the press-fit terminal 1 is inserted into the through hole 23 of the substrate 20 in the present embodiment. As shown in fig. 1, the Y direction is the 1 st orthogonal direction (orthogonal direction) of the press-fit terminal 1 orthogonal to the insertion direction X. As shown in fig. 2, the Z direction is a 2 nd orthogonal direction of the press-fit terminal 1 orthogonal to the insertion direction X and the 1 st orthogonal direction Y, respectively. In the present specification, the press-fit terminal 1 has a front end along the insertion direction X and a base end on the opposite side to the front end in the insertion direction X.

The press-fit terminal 1 according to the present embodiment is used for a substrate 20 such as a printed circuit board, for example. As shown in fig. 1, the substrate 20 has an electrically insulating substrate body 21. The substrate main body 21 has an electrically conductive circuit portion 22 and a through hole 23 electrically connected to the circuit portion 22. The circuit portion 22 is disposed on one surface (mounting surface) of the substrate 20 in the insertion direction X, for example. The through hole 23 is formed in a cylindrical shape having a penetration axis Xs, for example, so as to penetrate the substrate body 21 in the insertion direction X. The through hole 23 is formed so that the diameter R1 is constant in the insertion direction X. The inner peripheral surface of the through hole 23 is covered with a conductive portion 28 which is an electrically conductive material. The press-fit terminal 1 and the substrate 20 constitute a terminal-equipped substrate 2 (see fig. 4). In other words, the terminal-equipped board 2 is configured to include the press-fit terminal 1 and the board 20.

For example, as shown in fig. 1, the press-fit terminal 1 has an axial center Xt along the insertion direction X of the substrate 20, which is formed of an electrically conductive material such as a copper alloy, and includes a distal end portion 3, a plastic portion 5, and a proximal end portion 7. The press-fit terminal 1 is formed to extend along the insertion direction X, and is connected to a substrate 20 via a plastic part 5 or the like at a tip end portion, which is an end portion on one side (tip end side), and is connected to a connection target (a target electrically connected to the substrate 20) at a base end portion, which is an end portion on the other side (base end side), in the insertion direction X. On the surface of the press-fit terminal 1, a plating layer formed by tin plating, silver plating, gold plating, or the like may be formed. The press-fit terminal 1 is formed to be substantially line-symmetrical with respect to the axial center Xt.

The leading end portion 3 is a portion located on the most leading end side of the press-fit terminal 1, and has a 1 st portion 31 and a 2 nd portion 32. The 1 st portion 31 is a portion extending in the opposite direction opposite to the insertion direction X so that the width W1 gradually increases from the distal end side toward the proximal end side. The 2 nd portion 32 is located on the base end side of the 1 st portion 31, extends in the insertion direction X, and is a portion extending in the insertion direction X with the width dimension W2 in the 1 st orthogonal direction Y unchanged. A width dimension W1 of the 1 st portion 31 in the 1 st orthogonal direction Y and a width dimension W2 of the 2 nd portion 32 in the 1 st orthogonal direction Y are smaller than the diameter R1 of the through-hole 23. Thereby, the tip end portion 3 can be inserted into the through hole 23.

The base end portion 7 is located on the most base end side of the press-fit terminal 1, and is formed to extend in the insertion direction X so that the width dimension W3 in the 1 st orthogonal direction Y is constant.

The moldable portion 5 is disposed adjacent to the base end side of the distal end portion 3 and adjacent to the distal end side of the base end portion 7 in the insertion direction X. The width dimension of the plastic part 5 in the 1 st orthogonal direction Y is larger than the width dimensions W1, W2 of the distal end part 3 in the 1 st orthogonal direction Y, and is larger than the width dimension W3 of the proximal end part 7 in the 1 st orthogonal direction Y. The plastic part is a part pressed into the through hole 23.

The plastic portion 5 has an introduction portion 51 located on the distal end side, a rigid body portion 52 located on the proximal end side, and a central portion 53 located between the introduction portion 51 and the rigid body portion 52 in the insertion direction X, and has a through hole 8 located at the center in the 1 st orthogonal direction Y and extending along the insertion direction X. The plastic part 5 is bifurcated by having the through-hole 8. Therefore, in the plastic part 5, the through hole 8 is located at the center in the insertion direction X, and the pair of press-fitting parts 60a and 60b are disposed on one side and the other side of the through hole 8 in the 1 st orthogonal direction Y. The pair of press-fitting portions 60a and 60b are each a portion extending in a columnar shape along the insertion direction X, and are formed so as to be curved so as to protrude in the 1 st orthogonal direction Y toward the opposite side (i.e., outward in the 1 st orthogonal direction Y) from the through hole 8. The pair of press-fitting portions 60a and 60b are located at opposing positions in the 1 st orthogonal direction Y. In other words, in the pair of press-fitting portions 60a and 60b, one press-fitting portion 60a and the other press-fitting portion 60b face each other in the 1 st orthogonal direction Y. The pair of press-fitting portions 60a and 60b are press-fitted into the through hole 23 along the insertion direction X.

The introduction portion 51 is a portion which is disposed adjacent to the leading end portion 3 and in which a width W4 in the 1 st orthogonal direction Y gradually increases from the leading end side toward the base end side.

The rigid body portion 52 is a portion which is disposed adjacent to the base end portion 7 and in which the width W5 in the 1 st orthogonal direction Y gradually increases from the tip end side toward the base end side.

In the press-fit terminal 1, the central portion 53 includes a wide portion 53a, which is a portion where the width W6 is largest in the 1 st orthogonal direction Y, and the width in the 1 st orthogonal direction Y gradually decreases from the wide portion 53a in the insertion direction X and the opposite direction opposite to the insertion direction X. The width dimension of the central portion 53 in the 1 st orthogonal direction Y is slightly larger than the diameter R1 of the through-hole 23.

The through hole 8 is formed in a substantially elliptical shape elongated in the insertion direction X when viewed from the front, and is formed to penetrate the moldable portion 5 in the 2 nd orthogonal direction Z as shown in fig. 2. The through hole 8 is located between the pair of press-fitting portions 60a and 60b in the 1 st orthogonal direction Y, and allows the pair of press-fitting portions 60a and 60b to be deformed inward in the 1 st orthogonal direction Y.

As shown in fig. 1, the through-hole 8 has, in the insertion direction X: a base end portion 81 located at the base end in the insertion direction X; a front end portion 82 located at the front end in the insertion direction X; and a central portion 83 located between the base portion 81 and the front portion 82. The base end portion 81 is formed in a semicircular shape in which the width dimension in the 1 st orthogonal direction Y gradually increases along the insertion direction X. The distal end portion 82 is formed in a semicircular shape in which the width dimension in the 1 st orthogonal direction Y gradually increases in the opposite direction opposite to the insertion direction X. The central portion 83 is formed such that the width dimension of the base end side is gradually narrowed in the opposite direction opposite to the insertion direction X as compared with the width dimension of the tip end side. The central portion 83 is included in the 1 st central position 80a of the through hole 8 in the insertion direction X. The diameter of the base end portion 81 is smaller than the diameter of the front end portion 82.

As shown in fig. 2, the through-hole 8 has a 2 nd central position 80b in the 2 nd orthogonal direction Z, and is formed to be substantially line-symmetrical with respect to the 2 nd central position 80b on a plane including the 1 st orthogonal direction Y and the 2 nd orthogonal direction Z.

As shown in fig. 3, the pair of press-fitting portions 60a and 60b have inner wall surfaces 61a and 61b located on the through hole 8 side in the 1 st orthogonal direction Y and facing each other. In other words, the press-fitting portions 60a and 60b have inner wall surfaces 61a and 61b on the inner side in the 1 st orthogonal direction Y. The press-fitting portions 60a and 60b have outer wall surfaces 62a and 62b located on the opposite side of the through hole 8 in the 1 st orthogonal direction Y. In other words, the press-fitting portions 60a and 60b have outer wall surfaces 62a and 62b on the outer sides in the 1 st orthogonal direction Y. The inner side in the 1 st orthogonal direction Y is a side adjacent to the through hole 8 in the 1 st orthogonal direction Y and is a side close to the axial center Xt. The outer side in the 1 st orthogonal direction Y is the opposite side to the through hole 8 in the 1 st orthogonal direction Y and is the side away from the axis Xt.

The introduction portion 51, the rigid body portion 52, and the central portion 53 of the plastic portion 5 configured as described above will be described in further detail below.

The introduction portion 51 has a branch portion 51a, a pair of base end side portions 51b, 51c, and a leading end side portion 51 d. The branch portion 51a is located at the front end of the through hole 8 in the insertion direction X, and branches off the pair of press-fitting portions 60a and 60 b. The pair of base end side portions 51b, 51c are portions where the leading end portion 82 of the through hole 8 is formed, and are located on the base end side of the branch portion 51 a. The front end side portion 51d is located on the front end side of the branch portion 51a and the through hole 8 is not located there. In other words, the introduction portion 51 is positioned at the distal end of the through hole 8 in the insertion direction X, and is a portion into which the pair of press-fitting portions 60a and 60b are branched. The introduction portion 51 has outer surfaces 51e and 51f on the outer side in the 1 st orthogonal direction.

The rigid body portion 52 has an intersecting portion 52a, a pair of leading end side portions 52b, 52c, and a base end side portion 52 d. The intersecting portion 52a is located at the base end of the through hole 8 in the insertion direction X, and the pair of press-fitting portions 60a, 60b intersect. The pair of front end side portions 52b, 52c are portions where the base end portion 81 of the through hole 8 is formed, and are located on the front end side of the intersecting portion 52 a. The base end side portion 52d is located on the base end side of the intersecting portion 52a and the through hole 8 is not located there. In other words, the rigid body portion 52 is located at the base end of the through hole 8 on the opposite side to the tip end side in the insertion direction X, and is a portion where the pair of press-fitting portions 60a, 60b intersect. The rigid body portion 52 has outer surfaces 52e and 52f on the outer sides in the 1 st orthogonal direction.

The central portion 53 is a portion in which the through hole 8 is formed over the entire range in the insertion direction X, and the introduction portion 51 includes a distal end portion 51d in which the through hole 8 is not present, and the rigidity of the introduction portion 51 is higher than that of the central portion 53 in the 1 st orthogonal direction Y. Similarly, the central portion 53 is a portion in which the through-hole 8 is formed over the entire range in the insertion direction X, and the rigid body portion 52 includes the base end side portion 52d in which the through-hole 8 is not present, and therefore the rigidity of the rigid body portion 52 is higher than that of the central portion 53 in the 1 st orthogonal direction Y.

In the rigid body portion 52 of the present embodiment, the outer surfaces 52e and 52f in the 1 st orthogonal direction Y have curved concave portions 521a and 521b formed by concavely curving toward the axial center Xt. The curved concave portion 521a of the one press-fitting portion 60a has one end 522a and the other end 522b, and is located closer to the axial center Xt side than an imaginary line segment 522 passing through the one end 522a and the other end 522 b. The one end 522a is located on the front end side in the insertion direction X. The other end 522b is located on the base end side opposite to the tip end side in the insertion direction X. The curved concave portion 521b of the other press-fitting portion 60b has one end 523a and the other end 523b, and is located closer to the axial center Xt side than an imaginary line segment 523 passing through the one end 523a and the other end 523 b. The one end 523a is located on the front end side in the insertion direction X. The other end 523b is located on the base end side opposite to the tip end side in the insertion direction X. Such curved recesses 521a and 521b are formed only in the rigid body portion 52 and are not formed in the introduction portion 51. The curved recesses 521a and 521b are located outside the base end portion 81 of the through hole 8 in the 1 st orthogonal direction Y. In other words, the base end portion 81 of the through hole 8 is located inside the 1 st orthogonal direction Y of the curved concave portions 521a and 521 b.

One ends 522a, 523a of the curved recesses 521a, 521b are located between the tip of the base end portion 81 of the through-hole 8 and the 1 st central position 80a in the insertion direction X. The other ends 522b and 523b are located at the tip in the insertion direction X of the base end portion 7 having the same width dimension W3 (see fig. 1) in the 1 st orthogonal direction Y. In other words, the curved recesses 521a and 521b are located on the outer surfaces 52e and 52f of the rigid body portion 52 in the 1 st orthogonal direction Y, and include: one ends 522a, 523a located between the base end portion 81 and the 1 st central position 80a in the insertion direction X; and the other ends 522b, 523b located at the front end of the proximal end portion 7 in the insertion direction X. The curved concave portions 521a and 521b are concavely curved from the one ends 522a and 523a and the other ends 522b and 523b toward the axial center Xt.

The inner wall surfaces 61a, 61b have curved convex portions 524a, 524b formed by convexly curving toward the axial center Xt at the end portions of the rigid body portion 52 in the insertion direction X. In other words, the inner wall surfaces 61a and 61b have curved convex portions 524a and 524b formed by convexly curving toward the through hole 8 at the end portions of the rigid body portion 52 in the insertion direction X. The curved convex portion 524a of the one press-fitting portion 60a has one end 525a and the other end 525b, and is located closer to the axial center Xt side than the 2 nd imaginary line segment 525 passing through the one end 525a and the other end 525 b. The one end 525a is located on the front end side in the insertion direction X. The other end 525b is located on the base end side opposite to the tip end side in the insertion direction X. The curved convex portion 524b of the other press-fitting portion 60b has one end 526a and the other end 526b, and is located closer to the axial center Xt side than the 2 nd imaginary line segment 526 passing through the one end 526a and the other end 526 b. The one end 526a is located on the front end side in the insertion direction X. The other end 526b is located on the base end side opposite to the tip end side in the insertion direction X.

One ends 525a, 526a of the curved convex portions 524a, 524b are located between one ends 522a, 523a of the curved concave portions 521a, 521b and the 1 st central position 80a in the insertion direction X. The other ends 525b, 526b are located at the front ends in the insertion direction X of the base end portion 81 of the through hole 8. In other words, the curved convex portions 524a and 524b are located at the end portions of the rigid body portion 52 in the insertion direction X, and have: one ends 525a, 526a between one ends 522a, 523a of the curved recesses 521a, 521b and the 1 st central position 80 a; and the other ends 525b, 526b located at the distal ends in the insertion direction X of the base end portion 81 of the through hole 8. The curved convex portions 524a and 524b are curved convexly from the one ends 525a and 526a and the other ends 525b and 526b toward the axial center Xt.

The press-fit terminal 1 can make the width dimensions W7, W8 in the 1 st orthogonal direction Y of the front end side portions 52b, 52c of the rigid body portion 52 large by the bent convex portions 524a, 524 b. The curved convex portions 524a and 524b are located inside the curved concave portions 521a and 521b in the 1 st orthogonal direction Y. Such curved convex portions 524a and 524b are formed only in the rigid body portion 52 and are not formed in the introduction portion 51.

In the plastic part 5 configured as described above, the introduction part 51 and the rigid body part 52 are formed to be substantially line-symmetrical with respect to the 1 st central position 80a on a plane including the insertion direction X and the 1 st orthogonal direction Y. In the plastic part 5, if the distal end side and the proximal end side in the insertion direction X are compared with respect to the 1 st central position 80a, the curved recesses 521a and 521b are formed in the rigid body part 52, and the curved recesses 521a and 521b are not formed in the introduction part 51. Therefore, the outer surfaces 51e and 51f of the introduction portion 51 are positioned outside the curved recesses 521a and 521b of the rigid body portion 52 in the 1 st orthogonal direction Y. In other words, the curved recesses 521a and 521b of the rigid body portion 52 are located inside the outer surfaces 51e and 51f of the introduction portion 51 in the 1 st orthogonal direction Y. In the 1 st orthogonal direction Y, the inner wall surfaces 61a, 61b of the introduction portion 51 are located outside the curved convex portions 524a, 524b of the rigid body portion 52. In other words, in the 1 st orthogonal direction Y, the curved convex portions 524a, 524b of the rigid body portion 52 are located inside the inner wall surfaces 61a, 61b of the introduction portion 51.

When mounting the press-fit terminal 1 on the substrate 20, first, the operator aligns the through axis Xs of the through hole 23 with the axial center Xt of the press-fit terminal 1 as shown in fig. 1. Next, the operator inserts the distal end portion 3 into the through hole 23.

In the press-fit terminal 1, the width dimension of the central portion 53 in the 1 st orthogonal direction Y is slightly larger than the diameter R1 of the through-hole 23 in the 1 st orthogonal direction Y. Therefore, if the worker inserts the press-fit terminal 1 into the through-hole 23 along the insertion direction X, the outer wall surfaces 62a, 62b of the press-fitting portions 60a, 60b in the central portion 53 contact the inner peripheral surface of the through-hole 23.

Then, if the operator further inserts the plastic part 5 into the through hole 23 along the insertion direction X, the press-fitting parts 60a and 60b of the plastic part 5 are deformed, and the plastic part 5 is press-fitted into the through hole 23. More specifically, as shown in fig. 4 and 5, the inner wall surfaces 61a and 61b of the pair of press-fitting portions 60a and 60b are deformed so as to approach each other in the 1 st orthogonal direction Y, and the width of the through-hole 8 in the 1 st orthogonal direction Y is reduced. As shown in fig. 4, the worker presses the moldable part 5 into the through hole 23 to a position where the 1 st center position 80a of the through hole 8 coincides with the center position 24 of the through hole 23 in the insertion direction X, thereby completing the mounting of the press-fit terminal 1 to the board 20.

The substrate 2 with terminal is pressed into the through hole 23, and is positioned between the inner peripheral surface of the through hole 23 of the substrate 20 and the outer surfaces 52e and 52f of the rigid body portion 52, and has spaces S1 and S2 formed by the curved concave portions 521a and 521 b.

The press-fit terminal 1 and the terminal-equipped board 2 according to the present embodiment have the following rigid body portion 52. As shown in fig. 3, the rigid body portion 52 has curved concave portions 521a and 521b formed by concavely curving toward the axial center Xt on the outer surfaces 52e and 52f in the 1 st orthogonal direction Y. In the press-fit terminal 1, in a state where the rigid body portion 52 is press-fitted into the through-hole 23, spaces S1, S2 can be formed between the outer surfaces 52e, 52f of the rigid body portion 52 and the inner peripheral surface of the through-hole 23 by the curved concave portions 521a, 521 b. Therefore, the outer surfaces 52e, 52f of the rigid body portion 52 can be prevented from contacting the inner peripheral surface of the through hole 23, and thus the press-fit terminal 1 can suppress application of an excessive force to the substrate 20 due to the contact of the outer surfaces 52e, 52f of the rigid body portion 52 with the inner peripheral surface of the through hole 23.

Even if the rigid body portion 52 is positioned inside the through hole 23 in the state where the press-fit terminal 1 is press-fitted into the through hole 23, the outer surfaces 52e and 52f of the rigid body portion 52 do not contact the inner peripheral surface of the through hole 23 due to the curved concave portions 521a and 521b, and thus an excessive force is not applied to the substrate 20. In the press-fit terminal 1, even if the rigid body portion 52 is located outside the through-hole 23 in the state of being press-fitted into the through-hole 23, the outer surfaces 52e and 52f of the rigid body portion 52 do not contact the inner peripheral surface of the through-hole 23, and thus an excessive force is not applied to the substrate 20. Therefore, the press-fit terminal 1 does not exert an excessive force on the substrate 20 regardless of whether the rigid body portion 52 is located inside or outside the through-hole 23, and therefore, the tolerance that allows the position of the rigid body portion 52 with respect to the substrate 20 to deviate in the insertion direction X can be increased. As a result, the press-fit terminal 1 can be easily manufactured.

Since the press-fit terminal 1 does not have the curved recessed portions 521a and 521b formed on the outer surfaces 51e and 51f of the introduction portion 51, the outer surfaces 51e and 51f of the introduction portion 51 can be brought into contact with the inner circumferential surface of the through-hole 23. Therefore, in the press-fit terminal 1, the range of the tip end side in which the contact to be electrically connected to the substrate 20 can be formed can be made longer than the base end side in the insertion direction X. As a result, the press-fit terminal 1 can increase the size in the insertion direction X in which the contact that makes electrical connection with the substrate 20 can be formed, and thus can make electrical connection with the substrate 20 reliably.

The inner wall surfaces 61a and 61b of the press-fit terminal 1 have curved convex portions 524a and 524b formed by bending convexly toward the axial center Xt at the end portions of the rigid body portion 52 in the insertion direction X. The press-fit terminal 1 can make the width dimensions W7, W8 in the 1 st orthogonal direction Y of the front end side portions 52b, 52c of the rigid body portion 52 large by the bent convex portions 524a, 524 b. Therefore, even if the curved recessed portions 521a and 521b are not formed in the rigid body portion 52, the rigidity of the distal end side portions 52b and 52c of the rigid body portion 52 in the 1 st orthogonal direction Y can be maintained relatively high, and the strength of the distal end side portions 52b and 52c of the rigid body portion 52 can be ensured.

The curved convex portions 524a, 524b of the press-fit terminal 1 extend in the insertion direction X beyond the one ends 522a, 523a of the curved concave portions 521a, 521b in the insertion direction X. Therefore, even if the bent concave portions 521a and 521b are not formed in the rigid body portion 52, the rigidity of the distal end side portions 52b and 52c of the rigid body portion 52 in the 1 st orthogonal direction Y can be improved by the bent convex portions 524a and 524b in the press-fit terminal 1. Thereby, the press-fit terminal 1 can reliably ensure the strength of the front end side portions 52b, 52c of the rigid body portion 52.

In the through hole 8 of the press-fit terminal 1, the diameter of the base end portion 81 located at the base end in the insertion direction X is smaller than the diameter of the leading end portion 82 located at the leading end in the insertion direction X, and the base end portion 81 of the through hole 8 is located inside the curved concave portions 521a, 521b in the 1 st orthogonal direction Y. Therefore, the press-fit terminal 1 can increase the width dimension of the distal end side portions 52b, 52c of the rigid body portion 52 in the 1 st orthogonal direction Y by the base end portion 81 of the through hole 8. As a result, even if the curved recesses 521a, 521b are not formed in the rigid body portion 52, the press-fit terminal 1 can further improve the rigidity of the front end side portions 52b, 52c of the rigid body portion 52 in the 1 st orthogonal direction Y. Thereby, the press-fit terminal 1 can further reliably ensure the strength of the front end side portions 52b, 52c of the rigid body portion 52.

The press-fit terminal 1 described in the above embodiment has been described as having the through hole 8 in a vertically long, substantially elliptical shape extending along the insertion direction X in front view. However, the present invention is not limited thereto, and the through-hole 8 may have another shape.

The press-fit terminal 1 described in the above embodiment has been described in a manner that the rigid body portion 52 is formed with the pair of curved concave portions 521a and 521b substantially in line symmetry with respect to the axial center Xt. However, the present invention is not limited to this, and the press-fit terminal 1 may be configured such that only one of the pair of curved recesses 521a and 521b is formed in the rigid body portion 52.

Further, the press-fit terminal 1 described in the above embodiment has been described in a manner that the pair of curved convex portions 524a and 524b are formed on the inner wall surfaces 61a and 61b of the rigid body portion 52 substantially in line symmetry with the axial center Xt as a reference. However, the present invention is not limited to this, and the press-fit terminal 1 may be configured such that only one of the pair of curved convex portions 524a and 524b is formed on the inner wall surfaces 61a and 61b of the rigid body portion 52.