JP2018097963A - Press-fit terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press-fit terminal capable of enhancing a contact load with a conductor without changing a size and a material.SOLUTION: Disclosed is a press-fit terminal 11 including a press-fit part 21 which is brought into conductive contact with a conductive layer 33 on an inner surface of a through-hole 32 by being inserted into the through-hole 32. The press-fit terminal includes: a pair of contact parts 22 which is expanded in a direction in which being separated from each other; a reinforcement part 25 which is formed integrally with the contact parts 22, provided in a space 23 between contact parts 22, and suppresses displacement of the contact parts 22 displaced to an inside by reaction force received from the inner surface of the through hoe 32.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a press-fit terminal that comes into electrical contact with a conductor on the inner surface of a through hole by being inserted into a through hole or the like of a substrate.

  By being inserted into the through hole of the board, etc., as a press fit terminal that makes electrical contact with the conductor on the inner surface of the through hole, it is bent so that the tip is folded back, or a vertically long hole along the axial direction is formed One having a press-fit portion bulged outward is known (for example, see Patent Documents 1 and 2).

JP 2014-44913 A JP 2015-46238 A

  In recent years, press-fit terminals are expected to be used in increasingly severe environments. Therefore, a press-fit terminal having a press-fit portion that can sufficiently ensure a contact load with a conductor even in such a severe use environment is desired. On the other hand, press-fit terminals are required to be further reduced in size and cost. For this reason, it is desired to increase the contact load with the conductor in the press-fit portion without changing the size or material.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the press fit terminal which can raise the contact load with a conductor, without changing a size or material.

In order to achieve the above-described object, the press-fit terminal according to the present invention is characterized by the following (1) to (3).
(1) A press-fit terminal provided with a press-fit portion that is electrically connected to a conductor on the inner surface of the hole portion by being inserted into the hole portion,
The press fit portion is
A pair of contact portions bulged in a direction away from each other;
A reinforcing portion that is provided in a space formed between the pair of contact portions and suppresses displacement of the contact portion that is displaced inward by a reaction force received from an inner surface of the hole portion. Press-fit terminal.
(2) The reinforcing portion is formed of a reinforcing piece that is formed at each of the contact portions and abuts against each other when the inward displacement of the contact portion becomes a predetermined displacement. Press-fit terminal.
(3) The reinforcing portion is formed in a cross shape having four reinforcing pieces, the two reinforcing pieces are connected to one of the contact portions, and the other two reinforcing pieces are connected to the other contact portion. The press-fit terminal according to (1), wherein the press-fit terminal is provided.

According to the press-fit terminal having the configuration of (1) above, when the press-fit portion is inserted into the hole portion and disposed in the hole portion, the contact portion of the press-fit portion is brought inward by the reaction force from the inner surface of the hole portion. Pressed and displaced. Then, in a press fit part, the displacement to the inner side of a contact part is suppressed by the reinforcement part integrally formed in the contact part. Thereby, the firm contact state of a conductor and a contact part can be obtained. Therefore, the contact load with the conductor can be increased without changing the size or material, and good connection reliability can be obtained.
According to the press-fit terminal configured as described in (2) above, when the contact portion of the press-fit portion is pressed and displaced inward by the reaction force from the inner surface of the hole portion, the press-fit portion is integrally formed with the contact portion. Reinforcing pieces constituting the reinforcing portion are brought into contact with each other, and displacement to the inside of the contact portion due to a reaction force from the inner surface of the hole portion is suppressed. Thereby, the firm contact state of a conductor and a contact part can be obtained.
According to the press-fit terminal having the configuration of the above (3), when the contact portion of the press-fit portion is pressed and displaced inward by the reaction force from the inner surface of the hole portion, the hole portion is formed by the reinforcing portion made of a cross-shaped reinforcing piece. The inward displacement of the contact portion due to the reaction force from the inner surface of the is suppressed. Thereby, the firm contact state of a conductor and a contact part can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the press fit terminal which can raise the contact load with a conductor, without changing a size or material can be provided.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a side view of a press-fit terminal according to the present embodiment. FIG. 2 is a side view of the press-fit terminal showing a state in which the press-fit terminal according to the present embodiment is inserted into the through hole. FIG. 3 is a side view of a press-fit terminal according to the first modification. FIG. 4 is a side view of a press-fit terminal according to the second modification. FIG. 5 is a side view of a press-fit terminal according to the third modification. FIG. 6 is a side view for explaining a procedure for inserting a press-fit terminal according to the third modification. FIG. 7 is a side view of a press-fit terminal showing a state in which the press-fit terminal according to Modification 3 is inserted into the through hole. 8A and 8B are press-fit terminals according to the modified example 4, wherein FIG. 8A is a cross-sectional view in a direction perpendicular to the longitudinal direction in a state inserted in a through hole, FIG. 8B is a perspective view, and FIG. It is sectional drawing of a direction.

Specific embodiments relating to the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a press-fit terminal according to the present embodiment.

  As shown in FIG. 1, the press-fit terminal 11 according to the present embodiment has a substrate connection portion 12 on one end side and an electrical connection portion 13 on the other end side. The press-fit terminal 11 is made of, for example, a conductive metal material whose main component is copper. The press fit terminal 11 is formed by, for example, press working.

  The electrical connection portion 13 is formed in a tab shape. For example, a female terminal is electrically connected to the electrical connection portion 13 via a relay terminal, or a female terminal accommodated in a terminal accommodating chamber of the connector. The mold terminals are electrically connected.

  The board connecting part 12 has a press-fit part 21. The press fit portion 21 has a pair of contact portions 22. These contact portions 22 are bulged so as to be gently curved outward. Thereby, a long hole-shaped space 23 along the axial direction is formed between the contact portions 22 in the press fit portion 21.

  Further, the press fit portion 21 has a reinforcing portion 25 in the space portion 23. The reinforcing portion 25 has a pair of reinforcing pieces 26 formed in a plate shape. Each reinforcing piece 26 is integrally formed on the space portion 23 side in the contact portion 22. Each of the reinforcing pieces 26 is bulged so as to be gently curved in a direction close to each other. These reinforcing pieces 26 are arranged with a gap G therebetween. The reinforcing piece 26 is integrally formed with the press fit portion 21 by pressing.

  The board connection part 12 of the press-fit terminal 11 is inserted into a through hole (hole part) 32 of the board 31. The substrate 31 is formed of, for example, an epoxy resin and has through holes 32 penetrating the front and back. A conductor layer (conductor) 33 is formed on the inner surface of the through hole 32, and the conductor layer 33 is electrically connected to a conductor pattern (not shown) formed on the front and back surfaces of the substrate 31.

  As for the press fit terminal 11, the board | substrate connection part 12 is inserted in the through hole 32 of the board | substrate 31. FIG. The press fit portion 21 of the board connection portion 12 has a width dimension W slightly larger than the inner diameter D of the through hole 32.

Next, a case where the press-fit terminal 11 is connected to the substrate 31 will be described.
FIG. 2 is a side view of the press-fit terminal showing a state in which the press-fit terminal according to the present embodiment is inserted into the through hole.

  The board connecting part 12 of the press-fit terminal 11 is brought close to the through hole 32 of the board 31 and the tip of the board connecting part 12 is inserted into the through hole 32 of the board 31 (see arrow A in FIG. 1). Then, the contact part 22 of the press-fit part 21 contacts the edge part of the through hole 32 of the substrate 31.

  As shown in FIG. 2, the board connecting portion 12 is further inserted into the through hole 32, and the press fit portion 21 is disposed in the through hole 32. At this time, since the width dimension W of the press fit portion 21 is slightly larger than the inner diameter D of the through hole 32, the contact portion 22 constituting the press fit portion 21 slides on the surface of the conductor layer 33 of the through hole 32. To do. Thereby, the contact part 22 of the press fit part 21 is pressed inward by the reaction force from the inner surface of the through hole 32 and displaced inward. Then, in the press fit part 21, the width dimension of the space part 23 becomes small, and the reinforcement pieces 26 which comprise the reinforcement part 25 in the space part 23 contact | abut. Thereby, the displacement to the inner side of the contact part 22 by the reaction force from the inner surface of the through hole 32 is suppressed, and a firm contact state between the conductor layer 33 and the contact part 22 is obtained.

  As described above, according to the press-fit terminal 11 according to the present embodiment, when the contact portion 22 of the press-fit portion 21 is pressed and displaced inward by the reaction force from the inner surface of the through hole 32, the contact portion 22 is integrated with the contact portion 22. The reinforcing pieces 36 constituting the formed reinforcing portion 35 come into contact with each other, and the inward displacement of the contact portion 22 due to the reaction force from the inner surface of the through hole 32 is suppressed. Thereby, the firm contact state of the conductor layer 33 and the contact part 22 can be obtained. Therefore, the contact load with the conductor layer 33 can be increased without changing the size or material, and good connection reliability can be obtained.

  Next, various modifications of the press-fit terminal 11 will be described.

(Modification 1)
FIG. 3 is a side view of a press-fit terminal according to the first modification.

  As shown in FIG. 3, the press-fit terminal 11 </ b> A according to the first modification includes a reinforcing portion 25 </ b> A in the space 23 of the press-fit portion 21. The reinforcing portion 25A is formed in a cross shape having four rod-like reinforcing pieces 27A, the two reinforcing pieces 27A are connected to one contact portion 22, and the other two reinforcing pieces 27A are connected to the other contact portion 22. It is connected to. The reinforcing portion 25A is also integrally formed with the press-fit terminal 11A by pressing.

  In the press fit terminal 11A, when the board connecting portion 12 is inserted into the through hole 32 of the substrate 31 and the press fit portion 21 is disposed in the through hole 32, the contact portion 22 constituting the press fit portion 21 is a through hole. It is pushed inward by the reaction force from the inner surface of 32 and is displaced. Then, the contact portion 22 is supported by the reinforcing portion 25 </ b> A in the space portion 23, the inward displacement due to the reaction force from the inner surface of the through hole 32 is suppressed, and the conductor layer 33 and the contact portion 22 are in a strong contact state. Is obtained.

  As described above, according to the press-fit terminal 11A according to the modified example 1, the reinforcing portion 25A including the rod-shaped reinforcing piece 27A formed in a cross shape is brought into the contact portion 22 by the reaction force from the inner surface of the through hole 32. Therefore, a firm contact state between the conductor layer 33 and the contact portion 22 can be obtained.

(Modification 2)
FIG. 4 is a side view of a press-fit terminal according to the second modification.

  As shown in FIG. 4, the press-fit terminal 11 </ b> B according to Modification 2 includes a reinforcing portion 25 </ b> B formed in a plate shape in the space 23 of the press-fit portion 21. The reinforcing portion 25B is formed in a cross shape having four reinforcing plate portions 27B, the two reinforcing plate portions 27B are connected to one contact portion 22, and the other two reinforcing plate portions 27B are the other contact portions. 22 is connected. Moreover, the hole part 28 is formed in the reinforcement part 25B in the center position. The reinforcing portion 25B is also integrally formed with the press-fit terminal 11B by pressing.

  In the press-fit terminal 11B, when the board connecting part 12 is inserted into the through hole 32 of the board 31 and the press fit part 21 is disposed in the through hole 32, the contact part 22 constituting the press fit part 21 is a through hole. It is pushed inward by the reaction force from the inner surface of 32 and is displaced. Then, the contact portion 22 is supported by the reinforcing portion 25 </ b> B in the space portion 23, the inward displacement due to the reaction force from the inner surface of the through hole 32 is suppressed, and the conductor layer 33 and the contact portion 22 are in a strong contact state. Is obtained.

  As described above, according to the press-fit terminal 11B according to the modified example 2, the contact portion 22 of the contact portion 22 due to the reaction force from the inner surface of the through hole 32 is formed by the reinforcing portion 25B including the plate-shaped reinforcing plate portion 27B formed in a cross shape. The inward displacement can be suppressed, whereby a strong contact state between the conductor layer 33 and the contact portion 22 can be obtained.

(Modification 3)
FIG. 5 is a side view of a press-fit terminal according to the third modification. FIG. 6 is a side view for explaining a procedure for inserting a press-fit terminal according to the third modification. FIG. 7 is a side view of a press-fit terminal showing a state in which the press-fit terminal according to Modification 3 is inserted into the through hole.

  As illustrated in FIG. 5, the press-fit terminal 11 </ b> D according to the third modification includes a grip portion 45 in the substrate connection portion 12. The grip portion 45 is provided on the electrical connection portion 13 side (see FIG. 1) in the press fit portion 21. The grip portion 45 is a portion that is sandwiched and gripped by the jig T. The grip portion 45 has a gap portion 47 connected to the space portion 23.

  In the above press-fit terminal 11D, when the board connecting portion 12 is inserted into the through hole 32 of the board 31, the gripping portion 45 is held and held by the jig T as shown in FIG. Then, the grip part 45 having the gap part 47 is compressed in the width direction (arrow D direction in FIG. 6). Then, the gripping portion 45 is compressed, so that the contact portions 22 of the press-fit portion 21 are displaced in directions close to each other (arrow E direction in FIG. 6), and the width dimension W is reduced.

  In this state, as shown in FIG. 7, the press-fit portion 21 of the press-fit terminal 11 </ b> D is inserted and disposed in the through hole 32, and the gripping of the gripping portion 45 by the jig T is released. Then, the contact portions 22 that have been displaced in the directions approaching each other are restored and displaced outward (in the direction of arrow F in FIG. 7). Thereby, the firm contact state of the conductor layer 33 and the contact part 22 is obtained.

  As described above, according to the press-fit terminal 11D according to the modification example 3, the width dimension W of the press-fit portion 21 is reduced when inserted into the through hole 32. The contact load between 22 and the inner surface of the through hole 32 can be made as small as possible, and the insertion force can be suppressed.

  Accordingly, it is possible to suppress damage such as plating peeling of the contact portion 22 and whitening of the substrate 31 when the press-fit portion 21 is inserted into the through hole 32. Moreover, after insertion, the conductor layer 33 and the contact portion 22 are firmly connected. A contact state can be obtained. In particular, when the width dimension W of the press-fit portion 21 is set to be equal to or smaller than the inner diameter D of the through hole 32 when gripped by the jig T, the contact load between the inner surface of the through hole 32 and the contact portion 22 can be eliminated.

8A and 8B are press-fit terminals according to the modified example 4, wherein FIG. 8A is a cross-sectional view in a direction perpendicular to the longitudinal direction in a state inserted in a through hole, FIG. 8B is a perspective view, and FIG. It is sectional drawing of a direction.
As shown in FIG. 8, the press-fit portion 21 of the press-fit terminal 11 </ b> D has a recessed portion 47 and has a V-shaped cross section with respect to the terminal insertion direction. The both end portions of the press-fit portion 21 and the outer surface portion corresponding to the deepest point of the recess portion 47 constitute the contact portion 22 with respect to the through hole 32. Thereby, the conductor layer 33 and the three contact parts 22 will be in a contact state, and favorable connection reliability can be acquired.

  Further, since the depression 47 is formed in the press-fit portion 21, when the press-fit portion 21 is inserted into the through hole 32, the both ends of the press-fit portion 21 are bent in the approaching direction. Therefore, at the time of insertion, the contact load between the contact portion 22 constituted by both end portions of the press-fit portion 21 and the conductor layer 33 can be minimized, and the insertion force can be suppressed.

  When the press-fit portion 21 of the press-fit terminal 11D is inserted into the through hole 32, a strong contact state between the conductor layer 33 and the contact portion 22 is obtained by the restoring force of the bent recess portion 47. .

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

Here, the features of the above-described embodiment of the press-fit terminal according to the present invention will be summarized and listed in the following [1] to [3], respectively.
[1] A press-fit terminal provided with a press-fit portion (21) that is inserted into the hole (through hole 32) and is in electrical contact with the conductor (conductor layer 33) on the inner surface of the hole (through hole 32). (11, 11A, 11B),
The press fit portion is
A pair of contact portions (22) bulged in a direction away from each other;
Displacement of the contact portion (22) provided in a space portion (23) formed between the pair of contact portions (22) and displaced inward by a reaction force received from the inner surface of the hole portion (through hole 32). A press-fit terminal comprising: a reinforcing portion (25, 25A, 25B) that suppresses the pressure.
[2] The reinforcing portion (25) is formed on each of the contact portions (22), and the reinforcing pieces (26) are in contact with each other when the inward displacement of the contact portion (22) becomes a predetermined displacement. The press-fit terminal as set forth in [1].
[3] The reinforcing portion (25A, 25B) is formed in a cross shape having four reinforcing pieces (27A, 27B), and the two reinforcing pieces (27A, 27B) are connected to one contact portion (22). The press-fit terminal according to [1], wherein the other two reinforcing pieces (27A, 27B) are connected to the other contact portion (22).

11, 11A, 11B: Press-fit terminal 21: Press-fit part 22: Contact part 23: Space part 25, 25A, 25B: Reinforcement part 26: Reinforcement piece 27A, 27B: Reinforcement piece 32: Through hole (hole part)
33: Conductor layer (conductor)

Claims (3)

A press-fit terminal provided with a press-fit portion that is in conductive contact with the conductor on the inner surface of the hole by being inserted into the hole,
The press fit portion is
A pair of contact portions bulged in a direction away from each other;
A reinforcing portion that is provided in a space formed between the pair of contact portions and suppresses displacement of the contact portion that is displaced inward by a reaction force received from an inner surface of the hole portion. Press-fit terminal. 2. The press-fit terminal according to claim 1, wherein the reinforcing portion includes reinforcing pieces that are formed at each of the contact portions and abut against each other when the inward displacement of the contact portion becomes a predetermined displacement. . The reinforcing portion is formed in a cross shape having four reinforcing pieces, and the two reinforcing pieces are connected to one of the contact portions, and the other two reinforcing pieces are connected to the other contact portion. The press-fit terminal according to claim 1.

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