Board device

Abstract

To prevent the positional deviation of a press-fit terminal when being fitted to circuit boards, without increasing the number of components.SOLUTION: A board device comprises: a pair of circuit boards 10, 20 which are disposed to face each other; and a press-fit terminal 30 which is connected to the pair of circuit boards 10, 20. At both ends in a length direction of the press-fit terminal 30, there are formed a pair of press-fit parts 32, 33 which are press-fitted, in an elastically deformed manner, into through-holes 11, 21 on the pair of circuit boards 10, 20. At one end (a lower end) of the press-fit terminal 30, there is formed a positional deviation regulating part 40 which abuts against the first circuit board 10 when the first press-fit part 32 formed on the lower end is press-fitted into the first through-hole 11, thereby regulating the positional deviation of the first press-fit part 32 with respect to the first through-hole 11.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a substrate device. [Background technology]

[0002] Patent Document 1 discloses a structure for connecting a general board and an end board facing each other in parallel via multiple press-fit type board-to-board terminals. Both ends of the board-to-board terminals are formed with press-fit portions that can elastically deform to narrow their width. When attaching the board-to-board terminals to two boards, one press-fit portion is first press-fitted into a through-hole of one board, and then the other press-fit portion is press-fitted into a through-hole of the other board. When press-fitting the other press-fit portion into the through-hole, frictional resistance caused by elastic deformation of the other press-fit portion can cause one press-fit portion to shift out of position and penetrate through the through-hole to the back side. As a countermeasure, a pressure-receiving support fixed to the board-to-board terminal is abutted against the board to prevent the press-fit portion from moving out of the through-hole and penetrating to the back side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-042467 Summary of the Invention [Problem to be solved by the invention]

[0004] As a means for preventing the press-fit portion from moving through the through-hole to the rear side, a pressure support, which is a separate member from the board-to-board terminal, is used, which results in the problem of a large number of parts.

[0005] The substrate device disclosed herein was completed based on the above circumstances, and its purpose is to prevent misalignment of press-fit terminals when attached to a circuit board without increasing the number of parts. [Means for solving the problem]

[0006] The substrate device of the present disclosure includes: a pair of circuit boards arranged to face each other; press-fit terminals connected to the pair of circuit boards; a pair of press-fit portions are formed at both longitudinal ends of the press-fit terminal, the press-fit portions being press-fitted into the through-holes of the pair of circuit boards in an elastically deformed state; At one end of the press-fit terminal, a positional deviation prevention portion is formed which abuts against the circuit board when one of the press-fit portions formed at the one end is pressed into the through-hole, thereby preventing the one press-fit portion from misaligning with the through-hole. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to prevent the press-fit terminal from being misaligned when attached to a circuit board without increasing the number of parts. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view showing a cross section of a first circuit board and a second circuit board in a board device according to a first embodiment. [Figure 2] FIG. 2 is a side view showing a cross section of the first circuit board and the second circuit board in the board device. [Figure 3] FIG. 3 is a front view showing the process of connecting the press-fit terminal and the second circuit board, with the first circuit board and the second circuit board in cross section. [Figure 4] FIG. 4 is a perspective view of the press-fit terminal. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. Any combination of the following multiple embodiments within a range that does not cause contradictions is also included in the description of the present invention. The substrate device of the present disclosure includes: (1) A device comprising a pair of circuit boards arranged opposite each other and press-fit terminals connected to the pair of circuit boards, wherein a pair of press-fit portions is formed at both longitudinal ends of the press-fit terminal and is pressed into the through-holes of the pair of circuit boards in an elastically deformed state, and one end of the press-fit terminal is formed with a positional deviation prevention portion that abuts against the circuit board when one of the press-fit portions formed at the one end is pressed into the through-hole.

[0010] According to the configuration of the present disclosure, when one press-fit portion is press-fitted into a through-hole of one circuit board and the other press-fit portion is press-fitted into a through-hole of the other circuit board, a reaction force acting on the press-fit terminal from the other circuit board causes the one press-fit portion to move relative to the one circuit board in a direction passing through the through-hole. However, the misalignment prevention portion abuts against the one circuit board, preventing the one press-fit portion from moving relative to the one circuit board and maintaining it pressed into the through-hole. Because the misalignment prevention portion is formed integrally with the press-fit terminal, misalignment of the press-fit terminal during attachment to the circuit board can be prevented without increasing the number of parts.

[0011] (2) Preferably, the press-fit terminal is made of a metal plate, and the misalignment prevention portion extends in the thickness direction of the press-fit terminal. With this configuration, when the press-fit terminal receives a reaction force during press-fitting, the press-fit portion can be prevented from tilting in the through-hole.

[0012] (3) In (2), it is preferable that the misalignment prevention portion has a bent shape when the press-fit terminal is viewed parallel to the thickness direction of the circuit board, so that deformation of the misalignment prevention portion can be prevented when the press-fit terminal receives a reaction force during press-fitting.

[0013] (4) In (2) or (3), it is preferable that the pair of misalignment prevention portions have point-symmetric shapes when the press-fit terminal is viewed parallel to the thickness direction of the circuit board, which more reliably prevents the press-fit terminal from tilting when subjected to a reaction force during press-fitting.

[0014] [Details of the embodiments of the present disclosure] [Example 1] A substrate device according to a first embodiment of the present disclosure will be described with reference to FIGS. 1 to 4. The present invention is not limited to these examples, but is defined by the claims, and includes all modifications within the meaning and scope of the claims. In this first embodiment, the F direction in FIGS. 2 and 4 is defined as the front. The H direction in FIGS. 1 to 4 is defined as the up. The R direction in FIGS. 1, 3, and 4 is defined as the right.

[0015] The board device of the present first embodiment is configured to include one first circuit board 10, one second circuit board 20, and a plurality of press-fit terminals 30. The circuit (not shown) of the first circuit board 10 and the circuit (not shown) of the second circuit board 20 are connected via the plurality of press-fit terminals 30. For convenience, only one press-fit terminal 30 is shown in Figs. 1 to 3.

[0016] The first circuit board 10 and the second circuit board 20 are arranged so as to face each other in the vertical direction in a horizontal orientation (with the board thickness direction facing the vertical direction). The second circuit board 20 is arranged above the first circuit board 10. An upper surface 10S of the first circuit board 10 (the surface of the first circuit board 10 facing the second circuit board 20) and a lower surface 20S of the second circuit board 20 (the surface of the second circuit board 20 facing the first circuit board 10) are parallel to each other.

[0017] The first circuit board 10 has a plurality of circular first through holes 11 formed therein that penetrate the first circuit board 10 in the vertical direction. The second circuit board 20 has a plurality of circular second through holes 21 formed therein that penetrate the second circuit board 20 in the vertical direction. The first circuit board 10 and the second circuit board 20 are arranged so that the first through holes 11 and the second through holes 21 are positioned at the same position when both circuit boards 10, 20 are viewed from above in a plan view.

[0018] The press-fit terminal 30 is a member formed by bending a metal plate that has been punched into a predetermined shape. The press-fit terminal 30 is a single component having a terminal body 31, a first press-fit portion 32, a second press-fit portion 33, a pair of positioning portions 36, and a pair of misalignment prevention portions 40. The press-fit terminal 30 is attached to the first circuit board 10 and the second circuit board 20 so as to be electrically conductive, with the plate thickness direction facing the front-to-rear direction.

[0019] The terminal body 31 has a constant width in the left-right direction and is elongated in the up-down direction. The first press-fit portion 32 protrudes downward from the lower end of the terminal body 31. The second press-fit portion 33 protrudes upward from the upper end of the terminal body 31. The first press-fit portion 32 has a pair of resilient flexible portions 34 that are symmetrical on the left and right. The second press-fit portion 33 also has a pair of resilient flexible portions 34 that are symmetrical on the left and right. In a front view of the press-fit terminal 30, the pair of resilient flexible portions 34 have a symmetrical arch shape. A flexible space 35 is provided between the pair of resilient flexible portions 34, allowing the resilient flexible portions 34 to elastically deform so as to approach each other.

[0020] The pair of positioning portions 36 are portions that protrude in the left-right direction from the upper end of the terminal body portion 31. The positioning portions 36 are connected flush with the terminal body portion 31. The height of the upper edges of the pair of positioning portions 36 is set to the same height as the lower end of the second press-fit portion 33 (elastic bending portion 34).

[0021] The pair of misalignment prevention portions 40 are portions located at the lower end of the terminal body 31, above the upper end of the first press-fit portion 32. Each misalignment prevention portion 40 has a first prevention portion 41 and a second prevention portion 42. The first prevention portions 41 are portions that protrude outward in the width direction from the left and right edges of the terminal body 31. The first prevention portions 41 are parallel to the plate surfaces (front surface 31F and rear surface 31R) of the terminal body 31, and are continuous and flush with the plate surfaces of the terminal body 31. The shape of the first prevention portions 41 in a front view is rectangular.

[0022] The second restriction portion 42 of one of the misalignment restriction portions 40 is a portion that extends forward at a right angle from the extended end edge of the first restriction portion 41. The second restriction portion 42 of the other of the misalignment restriction portions 40 is a portion that extends rearward at a right angle from the extended end edge of the first restriction portion 41. The second restriction portion 42 is parallel to the plate thickness direction of the terminal main body 31. In a plan view, each of the misalignment restriction portions 40 has an L-shaped bent shape. The height of the lower end edge of the misalignment restriction portion 40 (the first restriction portion 41 and the second restriction portion 42) is set to the same height as the upper end of the first press-fit portion 32.

[0023] When attaching the press-fit terminal 30 to the first circuit board 10 and the second circuit board 20, first, the first press-fit portion 32 of the press-fit terminal 30 is press-fitted from above into the first through-hole 11 of the first circuit board 10. During the press-fitting process, the pair of elastic bending portions 34 elastically deform so as to approach each other. As the press-fitting of the first press-fit portion 32 progresses, the lower edges of the pair of misalignment prevention portions 40 come into contact with the upper surface 10S of the first circuit board 10, and attachment of the press-fit terminal 30 to the first circuit board 10 (press-fitting of the first press-fit portion 32 into the first through-hole 11) is completed.

[0024] After this, the press-fit terminal 30 is attached to the second circuit board 20. In this process, the second press-fit portion 33 is press-fit into the second through-hole 21 while the second circuit board 20 is lowered. At this time, the elastically flexible portion 34 of the second press-fit portion 33 elastically deforms while sliding against the opening edge of the second through-hole 21, and the elastic restoring force of the second press-fit portion 33 causes a downward reaction force (pressure) to act from the second circuit board 20 on the press-fit terminal 30. The pressure acting on the press-fit terminal 30 is received by the first opposing surface (upper surface 10S) of the first circuit board 10 via the misalignment prevention portion 40, so the press-fit terminal 30 does not displace downward relative to the first circuit board 10. Therefore, there is no risk that the first press-fit portion 32 press-fitted into the first through-hole 11 will displace downward so as to penetrate through the first through-hole 11.

[0025] The board device of the first embodiment includes a pair of circuit boards (a first circuit board 10 and a second circuit board 20) and a plurality of press-fit terminals 30. The first circuit board 10 and the second circuit board 20 are arranged parallel to each other and facing each other in the vertical direction. The press-fit terminal 30 is connected to the first circuit board 10 and the second circuit board 20. At both upper and lower ends in the longitudinal direction of the press-fit terminal 30, a pair of press-fit portions (a first press-fit portion 32 and a second press-fit portion 33) are formed that are press-fit into the through holes (a first through-hole 11 and a second through-hole 21) of the pair of circuit boards (the first circuit board 10 and the second circuit board 20) in an elastically deformed state.

[0026] A misalignment prevention portion 40 is formed at the lower end (one end) of the press-fit terminal 30. When the first press-fit portion 32 formed at the lower end of the press-fit terminal 30 is press-fitted into the first through-hole 11, the misalignment prevention portion 40 abuts against the first circuit board 10, thereby preventing misalignment of the first press-fit portion 32 with respect to the first through-hole 11.

[0027] According to the first embodiment, when the first press-fit portion 32 is press-fitted into the first through-hole 11 of the first circuit board 10 and the second press-fit portion 33 is press-fitted into the second through-hole 21 of the second circuit board 20, a reaction force acting from the second circuit board 20 on the press-fit terminal 30 causes the first press-fit portion 32 to move relative to the first circuit board 10 in the direction of passing through the first through-hole 11. However, the misalignment prevention portion 40 abuts against the first opposing surface of the first circuit board 10, thereby preventing the first press-fit portion 32 from moving relative to the first circuit board 10 and maintaining the first press-fit portion 32 pressed into the first through-hole 11. Because the misalignment prevention portion 40 is formed integrally with the press-fit terminal 30, misalignment of the press-fit terminal 30 during attachment to the second circuit board 20 can be prevented without increasing the number of components.

[0028] The press-fit terminal 30 is made of a metal plate. The second restriction portion 42 of the misalignment restriction portion 40 has a shape that extends in the plate thickness direction of the press-fit terminal 30. With this configuration, when the press-fit terminal 30 receives a reaction force from the second circuit board 20 during press-fitting, there is no risk that the terminal main body 31 will be displaced so that the plate surfaces (front surface 31F and rear surface 31R) will be tilted in the front-to-rear direction. Therefore, it is possible to prevent the first press-fit portion 32 from tilting in the front-to-rear direction within the first through-hole 11.

[0029] When the press-fit terminal 30 is viewed parallel to the thickness direction of the first circuit board 10 and the second circuit board 20 (in a plan view), the misalignment prevention portion 40 has an L-shaped bent shape. With this configuration, the rigidity of the misalignment prevention portion 40 is increased by the L-shaped bent shape, and therefore, deformation of the misalignment prevention portion 40 can be prevented when the press-fit terminal 30 receives a reaction force during press-fitting.

[0030] When the press-fit terminal 30 is viewed parallel to the thickness direction of the first circuit board 10 and the second circuit board 20, the pair of misalignment prevention portions 40 have a point-symmetric shape and are arranged. With this configuration, when the press-fit terminal 30 receives a reaction force during press-fitting, the posture of the lower end portion of the press-fit terminal 30 is stabilized, so that tilting of the press-fit terminal 30 can be more reliably prevented.

[0031] [Other Examples] The present invention is not limited to the examples described above and illustrated in the drawings, but is defined by the claims. The present invention includes the meaning equivalent to the claims and all modifications within the scope of the claims, including the following embodiments. The pair of positional deviation regulating portions may have a shape that is asymmetrical with respect to a point. The number of the positional deviation regulating unit may be only one. The misalignment prevention portion may be formed on both the upper and lower ends of the press-fit terminal. In this case, the misalignment prevention portion formed on one end of the press-fit portion and the misalignment prevention portion formed on the other end of the press-fit portion may have different shapes. The misalignment prevention portion may be formed by cutting out and raising a part of the terminal body. The pair of elastic flexible portions constituting the first press-fit portion may have an asymmetrical shape. The pair of elastic flexible portions constituting the second press-fit portion may have an asymmetrical shape. The first circuit board and the second circuit board may have opposing surfaces that face each other at an angle. [Explanation of symbols]

[0032] 10...First circuit board (circuit board, one circuit board) 10S...Top surface of the first circuit board 11...First through hole 20...Second circuit board (circuit board) 20S...Bottom surface of second circuit board 21...Second through hole 30...Press-fit terminal 31...Terminal body 31F...Front surface of terminal body (plate surface) 31R...Rear surface of terminal body (plate surface) 32...First press-fit portion (press-fit portion, one press-fit portion) 33...Second press-fit section (press-fit section) 34...Elastic flexible portion 35... Deflection allowance space 36... Positioning part 40... Misalignment prevention unit 41...First Regulatory Section 42...Second Regulatory Section

Claims

1. a pair of circuit boards arranged to face each other; press-fit terminals connected to the pair of circuit boards; a pair of press-fit portions are formed at both longitudinal ends of the press-fit terminal, the press-fit portions being press-fitted into the through-holes of the pair of circuit boards in an elastically deformed state; A substrate device in which one end of the press-fit terminal is formed with a positional deviation prevention portion that abuts against the circuit board when one of the press-fit portions formed at the one end is pressed into the through-hole, thereby preventing the one press-fit portion from misaligning with the through-hole.

2. The press-fit terminal is made of a metal plate material, The substrate device according to claim 1 , wherein the misalignment prevention portion extends in a thickness direction of the press-fit terminal.

3. 3. The substrate device according to claim 2, wherein the misalignment prevention portion has a curved shape when the press-fit terminal is viewed parallel to the thickness direction of the circuit board.

4. 4. The substrate device according to claim 2, wherein the pair of misalignment prevention portions are shaped to be point-symmetric when the press-fit terminal is viewed parallel to the thickness direction of the circuit board.

Images