JP2013069518A - Press-fit terminal and insertion method of press-fit terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press-fit terminal which prevents generation of an extraneous material due to metal exfoliation, and to provide an insertion method of the press-fit terminal.SOLUTION: A method of connecting a press-fit terminal to a through hole provided in a substrate includes the steps of: elastically deforming a press-fit terminal in a direction of narrowing the external diameter at a part being inserted into the through hole by applying an external force previously to the press-fit terminal; inserting the press-fit terminal into the through hole so as not to touch the through hole while maintaining elastic deformation of the press-fit terminal; and connecting the press-fit terminal and the through hole of the substrate with the elastic force of the press-fit terminal by removing the external force applied to the press-fit terminal.

Description

  The present invention relates to a press-fit terminal and a method for inserting a press-fit terminal into an insertion hole of a substrate.

  Conventionally, a connector having a press-fit terminal is known as a connector used by being attached to a substrate or the like. The press-fit terminal has a press-fit part that is formed slightly wider than the through-hole diameter, press-fit the terminal into the through-hole provided on the board, and bring the press-fit part into contact with the through-hole. Connected. As such a press-fit terminal, for example, in Patent Document 1, when a terminal is press-fitted into a through-hole, the press-fit portion in which the through-hole is formed is narrowed by the through-hole and press-fitting proceeds. A terminal is disclosed. FIG. 12 shows a perspective view of a press-fit terminal 900 disclosed in the patent document. Patent Document 2 discloses a press-fit terminal having a shape in which two terminals are branched from a base.

JP 2010-123415 A JP 2005-174654 A

  In the conventional press-fit terminal, when the press-fit terminal is press-fitted into the through hole of the substrate, press-fitting proceeds while the press-fit terminal and the inner wall of the through hole are in contact with each other. At this time, the metal of the press-fit terminal and the inner wall of the through hole was scraped, and the peeled metal adhered to the surroundings, which could adversely affect the quality of the product as a foreign matter.

  It is an object of the present invention to provide a press-fit terminal and a press-fit terminal insertion method that prevent the generation of foreign matters due to metal peeling.

  One aspect of the present invention is a method of connecting a press-fit terminal to a through-hole provided in a substrate, wherein an external force is applied to the press-fit terminal in advance, and the outer portion of the press-fit terminal is inserted into the through-hole. The step of elastically deforming in the direction of narrowing the diameter, the step of inserting the press-fit terminal into the through-hole so as not to contact the through-hole while maintaining the elastic deformation of the press-fit terminal, Removing the external force, and connecting the press-fit terminal and the through-hole of the substrate by the elastic force of the press-fit terminal.

  Another aspect of the present invention is a press-fit terminal, wherein a first terminal portion whose one end is inserted into a through hole of the substrate, and a second terminal portion whose one end is inserted into a through hole of the substrate, And a base portion connected at each other end of the first terminal portion and the second terminal portion, and the first terminal portion and the second terminal portion have a U-shaped shape as a whole. A curved portion is included in the vicinity.

  ADVANTAGE OF THE INVENTION According to this invention, a press fit terminal can be inserted without contacting the through-hole of a board | substrate, and the insertion method of the press fit terminal and press fit terminal which prevents generation | occurrence | production of the foreign material by metal peeling can be provided. .

Top view and front view of press-fit terminals according to first and second embodiments of the present invention The figure which shows the connection process of the press fit terminal and through hole which concern on the 1st Embodiment of this invention. The figure which shows the connection process of the press fit terminal and through hole which concern on the 1st Embodiment of this invention. The figure which shows the connection process of the press fit terminal and through hole which concern on the 1st Embodiment of this invention. The figure which shows the connection process of the press fit terminal and through hole which concern on the 1st Embodiment of this invention. The figure which shows the connection state of the press fit terminal and through hole which concern on the 1st Embodiment of this invention. The figure which shows the connection process of the press fit terminal and through-hole which concern on the 2nd Embodiment of this invention. The figure which shows the connection process of the press fit terminal and through-hole which concern on the 2nd Embodiment of this invention. The figure which shows the connection process of the press fit terminal and through-hole which concern on the 2nd Embodiment of this invention. The figure which shows the connection process of the press fit terminal and through-hole which concern on the 2nd Embodiment of this invention. The figure which shows the connection state of the press fit terminal and through-hole which concern on the 2nd Embodiment of this invention. Perspective view of a conventional press-fit terminal

(First embodiment)
A first embodiment of the present invention will be described. The press-fit terminal 100 according to the present embodiment will be described. FIG. 1A is a top view of the press-fit terminal 100. FIG. 1B is a front view of the press-fit terminal 100. In the press-fit terminal 100, the first terminal portion 101 and the second terminal portion 102 are connected to the base portion 103. The first terminal portion 101 is formed at a position opposite to the second terminal portion 102 on the base portion 103 side from the first insertion portion 104 and the first insertion portion 104 inserted into the through hole of the substrate. The stopper 105 is included. In addition, the second terminal portion 102 has a second insertion portion 106 to be inserted into the through-hole of the substrate, and a position on the base 103 side from the second insertion portion 106, on the opposite side to the first terminal portion 101. And the formed stopper 107.

  Hereinafter, a method of connecting the press-fit terminal 100 to the through hole will be described with reference to FIG.

  First, while preparing the board | substrate 200 in which the through hole 201 was formed, as shown to (a) of FIG. 2, the 1st terminal part 101 and the 2nd terminal part 102 of the press-fit terminal 100 are externally shown. It is sandwiched by the jig 300. The jig 300 has first and second terminal holding portions, and the first terminal holding portion contacts the vicinity of the base 103 side of the first terminal portion 101 and the end surface of the stopper 105. Further, the second terminal holding portion of the jig 300 contacts the vicinity of the base 103 side of the second terminal portion 102 from the stopper 107 and the end face of the stopper 107. FIG. 2B is a cross-sectional view showing how the jig 300 sandwiches the first terminal portion 101 and the second terminal portion 102.

  Next, as shown in FIG. 3A, the jig 300 is pressed in a direction to reduce the distance between the first terminal portion 101 and the second terminal portion 102, and the first terminal portion 101 and the first terminal portion The second terminal portion 102 is elastically deformed, and the distance between the outer end portions between the first insertion portion 104 and the second insertion portion 106 is made smaller than the inner diameter of the through hole 201. FIG. 3B is a cross-sectional view showing how the jig 300 is elastically deformed with the first terminal portion 101 and the second terminal portion 102 interposed therebetween.

  Next, as shown in FIG. 4, the first insertion portion 104 and the second insertion portion 106 are inserted into the through hole 201 of the substrate 200 while maintaining the pressing by the jig 300. At this time, by appropriately positioning, it is possible to prevent the first insertion portion 104 and the second insertion portion 106 from contacting the inner wall of the through hole 201.

  Next, as shown in FIG. 5, when the pressing by the jig 300 is stopped, the first terminal portion 101 and the second terminal portion 102 that have been elastically deformed are restored. As a result, the first insertion portion 104 and the second insertion portion 106 come into contact with the inner wall of the through hole 201 by elastic force while maintaining a constant contact pressure, and the press-fit terminal 100 and the through hole 201 are in contact with each other. Connection is complete. FIG. 6 shows an enlarged cross-sectional view in the vicinity of the through hole 201 when the connection is completed. From the first insertion portion 104 and the second insertion portion 106, an elastic force acts on the inner wall of the through hole 201 in the direction indicated by the arrow.

  In addition, in order for the 1st insertion part 104 and the 2nd insertion part 106 to maintain and maintain a fixed contact pressure with respect to the through-hole 201 with an elastic force, the 1st insertion when not pressing The distance between the outer end portions of the portion 104 and the second insertion portion 106 only needs to be larger than the inner diameter of the through hole 201.

  Further, the first terminal portion 101 and the second terminal portion 102 each have a portion having a curved shape in the vicinity of the connection portion with the base portion 103, and have a shape that forms a U-shape as a whole. preferable. Thereby, compared with the case where it is U-shaped, the stress is widely dispersed during pressing, so that a large elastic force can be obtained.

  In the present embodiment, the press-fit terminal 100 is elastically deformed in advance, so that when the first insertion portion 104 and the second insertion portion 106 are inserted into the through hole 201, the first insertion portion 104 and the first insertion portion 104 are inserted. The insertion proceeds without the contact between the second insertion portion 106 and the inner wall of the through hole 201. Even if the first insertion portion 104 or the second insertion portion 106 comes into contact with the inner wall of the through hole 201, the contact pressure is reduced compared to the conventional case. Therefore, it is possible to prevent the metal on the inner wall of the first insertion portion 104, the second insertion portion 106, or the through-hole 201 from being scraped, and the peeled metal adheres to the surroundings, thereby adversely affecting the quality of the product as a foreign matter.

(Second Embodiment)
A second embodiment of the present invention will be described. The present embodiment is different from the first embodiment in that the structure of the through hole connecting the press-fit terminal 100 is different, but the other points are the same as in the first embodiment.

  Hereinafter, a method of connecting the press-fit terminal 100 to the through hole will be described with reference to FIGS. About the structure similar to 1st Embodiment, the same referential mark as 1st Embodiment is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 7A, in the present embodiment, the substrate 400 has two through holes connected to the press-fit terminals 100.

  First, while preparing the board | substrate 400 in which the 1st through-hole 401 and the 2nd through-hole 402 were formed, as shown to (a) of FIG. 7, similarly to 1st Embodiment, the press-fit terminal 100 of FIG. The first terminal portion 101 and the second terminal portion 102 are sandwiched by the jig 300 from the outside. FIG. 7B also shows a cross-sectional view showing how the jig 300 sandwiches the first terminal portion 101 and the second terminal portion 102.

  Next, as shown in FIG. 8A, the jig 300 is pressed in a direction to reduce the distance between the first terminal portion 101 and the second terminal portion 102, and the first terminal portion 101 and the second terminal portion 102 are pressed. The two terminal portions 102 are elastically deformed. At this time, the distance between the outer ends of the first insertion portion 104 and the second insertion portion 106 is made smaller than the maximum distance between the inner walls of the first through hole 401 and the second through hole 402. In addition, the distance between the inner end portions of the first insertion portion 104 and the second insertion portion 106 is made larger than the minimum distance between the inner walls of the first through hole 401 and the second through hole 402. . FIG. 8B also shows a cross-sectional view showing how the jig 300 is elastically deformed with the first terminal portion 101 and the second terminal portion 102 interposed therebetween.

  Next, as shown in FIG. 9, the first insertion portion 104 is inserted into the first through hole 401 of the substrate 400 while the pressing by the jig 300 is maintained, and the second through hole 402 is inserted into the second through hole 402. The insertion part 106 is inserted. At this time, by appropriately positioning, the first insertion portion 104 does not contact the inner wall of the first through hole 401 and the second insertion portion 106 contacts the inner wall of the second through hole 402. You can avoid it.

  Next, as shown in FIG. 10, when the pressing by the jig 300 is stopped, the first terminal portion 101 and the second terminal portion 102 that have been elastically deformed try to recover. As a result, the first insertion portion 104 and the second insertion portion 106 are brought into contact with the inner walls of the first through hole 401 and the second through hole 402 by elastic force while maintaining a constant contact pressure, respectively. Then, the connection between the press-fit terminal 100 and the first through hole 401 and the second through hole 402 is completed. FIG. 11E shows an enlarged cross-sectional view of the vicinity of the first through hole 401 and the second through hole 402 when the connection is completed. From the first insertion portion 104 and the second insertion portion 106, an elastic force acts on the inner walls of the first through hole 401 and the second through hole 402 in the direction indicated by the arrows.

  In order for the first insertion portion 104 and the second insertion portion 106 to contact with the first through hole 401 and the second through hole 402 by elastic force while maintaining a constant contact pressure, respectively. The distance between the outer ends of the first insertion portion 104 and the second insertion portion 106 when not pressed is the maximum distance between the inner walls of the first through hole 401 and the second through hole 402. It needs to be larger.

  In this embodiment, the first insertion portion 104 and the second insertion portion 106 are changed to the first through-hole 401 and the second through-hole 402 by elastically deforming the press-fit terminal 100 in advance. When inserting, the insertion proceeds without the first insertion portion 104 and the second insertion portion 106 contacting the inner walls of the first through hole 401 and the second through hole 402, respectively. Or even if the 1st insertion part 104 or the 2nd insertion part 106 contacts the inner wall of the 1st through-hole 401 or the 2nd through-hole 402, a contact pressure is reduced compared with the past. Therefore, the metal on the inner wall of the first insertion portion 104, the second insertion portion 106, the first through-hole 401 or the second through-hole 402 is scraped off, and the peeled metal adheres to the surroundings, resulting in foreign matter on the product. It can prevent the quality from being adversely affected.

  The present invention is useful for a connector terminal used by being attached to a substrate or the like.

DESCRIPTION OF SYMBOLS 100 Press fit terminal 101 1st terminal part 102 2nd terminal part 103 Base part 104 1st insertion part 105,107 Stopper 106 2nd insertion part 200,400 Board | substrate 201,401,402 Through hole 300 Jig 900 Press Fit terminal

Claims (2)

A method of connecting a press-fit terminal to a through hole provided in a substrate,
Applying an external force to the press-fit terminal in advance and elastically deforming in a direction to narrow the outer diameter of the portion inserted into the through-hole of the press-fit terminal;
Inserting the press-fit terminal into the through-hole so as not to contact the through-hole while maintaining the elastic deformation of the press-fit terminal;
Removing the external force to the press-fit terminal, and connecting the press-fit terminal and the through hole of the substrate by the elastic force of the press-fit terminal. A press-fit terminal,
A first terminal portion, one end of which is inserted into a through hole of the substrate;
A second terminal portion, one end of which is inserted into the through hole of the substrate;
A base portion connected at each other end of the first terminal portion and the second terminal portion,
The press-fit terminal, wherein the first terminal portion and the second terminal portion include a curved portion in the vicinity of the base portion so as to have a U-shaped shape as a whole.

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