Board device

Abstract

To suppress the inclination of press-fit parts inside through-holes on circuit boards.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 first press-fit part 32 and a second press-fit part 33 which are press-fitted, in an elastically deformed manner, into through-holes 11, 21 on the pair of circuit boards 10, 20. The press-fit terminal 30 is provided with inclination regulating parts 36, 37 which come into contact with the circuit boards 10, 20 when the press-fit parts 32, 33 are press-fitted into the through-holes 11, 21, thereby regulating the inclination of the press-fit parts 32, 33 inside the through-holes 11, 21.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Patent Document 1 discloses a structure in which a general board and an end board that face each other in parallel are connected via a plurality of press-fit type inter-board terminals. A pair of press-fit portions that can be elastically deformed to narrow their width are formed on both ends of the inter-board terminal. The pair of press-fit portions are press-fitted into through holes in a pair of boards in an elastically deformed state. The press-fit portions and the boards are held in a connected state by frictional force caused by the elastic deformation of the press-fit portions. [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] When the general board and end board are displaced relative to each other in a direction parallel to their board surfaces, the position of the inter-board terminal tilts, and the press-fit portion also changes position inside the through-hole. When the position of the press-fit portion changes inside the through-hole, the amount of elastic deformation of the press-fit portion changes, which can lead to problems such as a decrease in the holding force of the press-fit portion, a change in contact resistance between the press-fit portion and the inner surface of the through-hole, and damage to the opening edge of the through-hole.

[0005] The board device of the present disclosure was completed based on the above circumstances, and aims to suppress tilting of a press-fit portion within a through-hole of a circuit board. [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; The press-fit terminal is formed with a tilt restriction portion that abuts against the circuit board when the press-fit portion is press-fitted into the through-hole to restrict tilt of the press-fit portion within the through-hole. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to suppress tilting of the press-fit portion in the through-hole of the circuit board. [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 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 connector includes a pair of circuit boards arranged to face 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 to be press-fitted into through-holes of the pair of circuit boards in a state where the press-fit portions are elastically deformed, and the press-fit terminals are formed with tilt-restricting portions that abut against the circuit boards when the press-fit portions are press-fitted into the through-holes to suppress tilt of the press-fit portions within the through-holes. According to the configuration of the present disclosure, when the pair of circuit boards are displaced relative to each other in a direction intersecting the opposing direction while the pair of press-fit portions are press-fitted into the through-holes of the pair of circuit boards, the tilt-restricting portions abut against the circuit boards to suppress tilt of the press-fit portions within the through-holes.

[0010] (2) Preferably, the press-fit portion has a pair of elastically deformable portions that are capable of elastically deforming in a direction toward each other and that elastically press against the inner peripheral surface of the through-hole, and the tilt restriction portion protrudes in a direction parallel to the elastic deformation direction of the pair of elastically deformable portions. With this configuration, it is possible to reliably prevent the press-fit portion from tilting in a way that would change the amount of elastic deformation of the pair of elastically deformable portions.

[0011] (3) In (1) or (2), it is preferable that the press-fit terminal is made of a metal plate, and the tilt restricting portion has a first restricting portion extending in the plate surface direction of the press-fit terminal and a second restricting portion extending in the plate thickness direction of the press-fit terminal. With this configuration, tilt of the press-fit portion in the through-hole can be restricted regardless of the direction in which the pair of circuit boards are displaced relative to each other.

[0012] (4) In (3), it is preferable that the pair of tilt restriction portions have point-symmetric shapes when the press-fit terminal is viewed parallel to the thickness direction of the circuit board. With this configuration, tilt of the press-fit portion in the through hole can be stably restricted regardless of the direction in which the pair of circuit boards are displaced relative to each other.

[0013] [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 3. 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 front-to-back direction is defined as the F direction in FIGS. 2 and 3. The up-down direction is defined as the H direction in FIGS. 1 to 3. The left-to-right direction is defined as the R direction in FIGS. 1 and 3.

[0014] 1, the board device of the 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.

[0015] 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.

[0016] 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 configured so that the first through holes 11 and the second through holes 21 are arranged in the same position when both circuit boards 10, 20 are viewed from above in a plan view.

[0017] 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 main body 31, a first press-fit portion 32, a second press-fit portion 33, a pair of first tilt restriction portions 36, and a pair of second tilt restriction portions 37. The press-fit terminal 30 is attached to the first circuit board 10 and the second circuit board 20 so as to be conductive, with the plate thickness direction facing the front-to-rear direction.

[0018] 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. Like the first press-fit portion 32, 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 deflection allowance 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.

[0019] The pair of first tilt restricting portions 36 are portions of the lower end of the terminal body 31 that are arranged at a position higher than the upper end of the first press-fit portion 32. Each first tilt restricting portion 36 has a first restricting portion 38 and a second restricting portion 39. The first restricting portions 38 are portions that protrude outward in the width direction from the left and right edges of the terminal body 31. The first restricting portions 38 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 restricting portions 38 in a front view is rectangular.

[0020] The second restricting portion 39 of one of the first tilt restricting portions 36 is a portion that extends forward at a right angle from the extending end edge of the first restricting portion 38. The second restricting portion 39 of the other first tilt restricting portion 36 is a portion that extends rearward at a right angle from the extending end edge of the first restricting portion 38. The second restricting portion 39 is parallel to the plate thickness direction of the terminal body 31. In a plan view, each of the first tilt restricting portions 36 has an L-shaped bent shape. The pair of first tilt restricting portions 36 have point-symmetric shapes in a plan view. In a side view of the press-fit terminal 30, the second restricting portion 39 has an L-shaped bent shape. The height of the lower end edge of the first tilt restricting portion 36 (the first restricting portion 38 and the second restricting portion 39) is set to the same height as the upper end of the first press-fit portion 32 (the elastically flexible portion 34).

[0021] The pair of second tilt restriction portions 37 are located at the upper end of the terminal body 31, below the lower end of the second press-fit portion 33. The pair of second tilt restriction portions 37 have a shape that is vertically symmetrical to the pair of first tilt restriction portions 36. Like the first tilt restriction portions 36, each second tilt restriction portion 37 has a first restriction portion 38 and a second restriction portion 39. The second tilt restriction portion 37 has an L-shaped bent shape in plan view, similar to the first tilt restriction portion 36. The pair of second tilt restriction portions 37 have a point-symmetric shape in plan view, similar to the first tilt restriction portion 36. The height of the upper edge of the second tilt restriction portion 37 (first restriction portion 38 and second restriction portion 39) is set to the same height as the lower end of the second press-fit portion 33 (elastic bending portion 34).

[0022] 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 first tilt restriction portions 36 (first restriction portion 38 and second restriction portion 39) 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.

[0023] Thereafter, the press-fit terminal 30 is attached to the second circuit board 20. In this step, the second press-fit portion 33 is press-fitted into the second through-hole 21 while the second circuit board 20 is being lowered. When the press-fitting of the second press-fit portion 33 progresses and the upper edges of the pair of second tilt restriction portions 37 (first restriction portion 38 and second restriction portion 39) come into contact with the lower surface 20S of the second circuit board 20, the attachment of the press-fit terminal 30 to the second circuit board 20 (press-fitting of the second press-fit portion 33 into the second through-hole 21) is completed.

[0024] During the process of press-fitting the second press-fit portion 33 into the second through-hole 21, the elastically flexible portion 34 of the second press-fit portion 33 elastically deforms while sliding against the edge of the opening of the second through-hole 21, and therefore 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 first tilt restriction portion 36, so the press-fit terminal 30 is not displaced 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 be displaced downward so as to penetrate through the first through-hole 11.

[0025] When the first press-fit portion 32 is press-fitted into the first through-hole 11 and the second press-fit portion 33 is press-fitted into the second through-hole 21, the press-fit terminal 30 is not soldered to the first circuit board 10 or the second circuit board 20. Therefore, if the first circuit board 10 and the second circuit board 20 are misaligned in the horizontal direction (a direction intersecting the opposing direction of the circuit boards 10 and 20), there is a concern that the first press-fit portion 32 will tilt within the first through-hole 11 and the second press-fit portion 33 will tilt within the second through-hole 21. If the press-fit portions 32 and 33 tilt within the through-holes 11 and 21, the amount of elastic deformation of the press-fit portions 32 and 33 will change, which may result in problems such as a decrease in the holding force of the press-fit portions 32 and 33, a change in contact resistance between the press-fit portions 32 and 33 and the inner surfaces of the through-holes 11 and 21, or damage to the opening edges of the through-holes 11 and 21.

[0026] To address this issue, in the first embodiment, a pair of first tilt restriction portions 36 are formed on the press-fit terminal 30 adjacent to the first press-fit portion 32, and the lower edges of the first tilt restriction portions 36 are abutted against the upper surface 10S of the first circuit board 10. The pair of first tilt restriction portions 36 abut against the first circuit board 10 in a spaced-apart positional relationship so as to sandwich the first press-fit portion 32 from both the left and right sides and the front and rear sides in plan view. Furthermore, a pair of second tilt restriction portions 37 are formed on the press-fit terminal 30 adjacent to the second press-fit portion 33, and the upper edges of the second tilt restriction portions 37 abut against the lower surface 20S of the second circuit board 20. The pair of second tilt restriction portions 37 abut against the second circuit board 20 in a spaced-apart positional relationship so as to sandwich the second press-fit portion 33 from both the left and right sides and the front and rear sides in plan view.

[0027] Therefore, even if the first circuit board 10 and the second circuit board 20 are displaced relative to each other in the front-rear or left-right directions, the first tilt restriction portion 36 abuts against the first circuit board 10, thereby preventing the first press-fit portion 32 from tilting relative to the first circuit board 10 (first through-hole 11). Furthermore, the second tilt restriction portion 37 abuts against the second circuit board 20, thereby preventing the second press-fit portion 33 from tilting relative to the second circuit board 20 (second through-hole 21). When the two circuit boards 10, 20 are displaced relative to each other, the press-fit terminal 30 deforms in a portion of the terminal body 31 that is continuous with the upper end of the first tilt restriction portion 36 and a portion that faces the lower end of the second tilt restriction portion 37.

[0028] 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.

[0029] A first tilt restricting portion 36 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 first tilt restricting portion 36 abuts against the first circuit board 10, thereby restricting misalignment of the first press-fit portion 32 with respect to the first through-hole 11.

[0030] The press-fit terminal 30 is made of a metal plate. The first tilt restriction portion 36 and the second restriction portion 39 of the second tilt restriction portion 37 have 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 body portion 31 will be displaced so that the plate surface (front surface 31F and rear surface 31R) will be tilted in the front-rear direction. Therefore, it is possible to prevent the first press-fit portion 32 from tilting in the front-rear direction within the first through-hole 11, and it is possible to prevent the second press-fit portion 33 from tilting in the front-rear direction within the second through-hole 21.

[0031] When press-fit terminal 30 is viewed parallel to the thickness direction of first circuit board 10 and second circuit board 20 (in a plan view), first tilt restricting portion 36 and second tilt restricting portion 37 are both bent into an L shape by first restricting portion 38 and second restricting portion 39. With this configuration, first tilt restricting portion 36 and second tilt restricting portion 37 are bent into an L shape, thereby increasing the rigidity thereof, and therefore, when press-fit terminal 30 receives a reaction force during press-fitting, first tilt restricting portion 36 and second tilt restricting portion 37 can be prevented from deforming.

[0032] 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 first tilt restriction portions 36 have a point-symmetric shape and arrangement, and the pair of second tilt restriction portions 37 also have a point-symmetric shape and arrangement. With this configuration, when the press-fit terminal 30 receives a reaction force during press-fitting, the postures of both the upper and lower ends of the press-fit terminal 30 are stable, making it possible to more reliably prevent the press-fit terminal 30 from tilting.

[0033] The press-fit terminal 30 is formed with a first tilt restriction portion 36 and a second tilt restriction portion 37. When the first press-fit portion 32 is press-fitted into the first through-hole 11, the first tilt restriction portion 36 abuts against the first circuit board 10, thereby restricting tilt of the first press-fit portion 32 within the first through-hole 11. When the second press-fit portion 33 is press-fitted into the second through-hole 21, the second tilt restriction portion 37 abuts against the second circuit board 20, thereby restricting tilt of the second press-fit portion 33 within the second through-hole 21.

[0034] The first press-fit portion 32 has a pair of elastically deformable portions 34 that are capable of elastically deforming in a direction toward each other and elastically press against the inner peripheral surface of the first through-hole 11. The first tilt restriction portion 36 protrudes in the left-right direction parallel to the elastic displacement direction of the pair of elastically deformable portions 34. This configuration reliably prevents the first press-fit portion 32 from tilting in a manner that would change the amount of elastic deformation of the pair of elastically deformable portions 34.

[0035] The second press-fit portion 33 has a pair of elastically deformable portions 34 that are capable of elastically deforming in a direction toward each other and elastically press against the inner peripheral surface of the second through-hole 21. The second tilt restriction portion 37 protrudes in the left-right direction parallel to the elastic displacement direction of the pair of elastically deformable portions 34. This configuration reliably prevents the second press-fit portion 33 from tilting in a manner that would change the amount of elastic deformation of the pair of elastically deformable portions 34.

[0036] The press-fit terminal 30 is made of a metal plate. The first tilt restriction portion 36 and the second tilt restriction portion 37 each have a first restriction portion 38 and a second restriction portion 39. The first restriction portion 38 extends in the plate surface direction of the press-fit terminal 30 (parallel to the front surface 31F and the rear surface 31R). The second restriction portion 39 extends in the plate thickness direction of the press-fit terminal 30 (a direction perpendicular to the front surface 31F and the rear surface 31R). With this configuration, regardless of the direction in which the first circuit board 10 and the second circuit board 20 are displaced relative to each other within a quadratic plane parallel to both the plate surface direction and the plate thickness direction of the press-fit terminal 30, tilt of the first press-fit portion 32 in the first through-hole 11 and tilt of the second press-fit portion 33 in the second through-hole 21 can be suppressed.

[0037] 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 opposing direction of the first circuit board 10 and the second circuit board 20), the pair of first tilt restriction portions 36 have a point-symmetric shape, and the pair of second tilt restriction portions 37 also have a point-symmetric shape. With this configuration, regardless of the direction in which the first circuit board 10 and the second circuit board 20 are relatively displaced within a two-dimensional plane orthogonal to the opposing direction of the first circuit board 10 and the second circuit board 20, the tilt of the first press-fit portion 32 within the first through-hole 11 and the tilt of the second press-fit portion 33 within the second through-hole 21 can be stably suppressed.

[0038] [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 second restricting portion may extend in the thickness direction of the press-fit terminal from the terminal body, and the first restricting portion may extend in the surface direction of the press-fit portion at a right angle from the extending end of the second restricting portion. The pair of first tilt restriction portions may have a point-asymmetric shape. The pair of second tilt restriction portions may have a point-asymmetric shape. The first tilt restriction portion may be formed by cutting out and raising a part of the terminal body. The second tilt restriction portion may be formed by cutting out and raising a part of the terminal body. The first tilt restriction portion formed at one end (lower end) of the press-fit portion and the second tilt restriction portion formed at the other end (upper end) of the press-fit portion may have different shapes. 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]

[0039] 10...First circuit board (circuit board) 10S...Top surface of the first circuit board 11...First through hole (through hole) 20...Second circuit board (circuit board) 20S...Bottom surface of second circuit board 21...Second through hole (through hole) 30...Press-fit terminal 31...Terminal body 31F...Front of terminal body (plate surface of press-fit terminal) 31R...Rear surface of terminal body (plate surface of press-fit terminal) 32...First press-fit part (press-fit part) 33...Second press-fit section (press-fit section) 34...Elastic flexible portion 35... Deflection allowance space 36...First tilt regulation portion (tilt regulation portion) 37...Second tilt regulation unit (tilt regulation unit) 38...First Regulatory Section 39...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; The press-fit terminal is formed with a tilt control portion that abuts against the circuit board when the press-fit portion is pressed into the through-hole, thereby suppressing tilt of the press-fit portion within the through-hole.

2. the press-fit portion has a pair of elastically deformable portions that are elastically deformable in a direction toward each other and that elastically press against the inner peripheral surface of the through-hole; The substrate device according to claim 1 , wherein the tilt regulating portion protrudes in a direction parallel to the elastic displacement direction of the pair of elastically flexible portions.

3. The press-fit terminal is made of a metal plate material, The tilt regulation portion is a first restricting portion extending in a plate surface direction of the press-fit terminal; 3. The substrate device according to claim 1, further comprising a second restricting portion extending in a thickness direction of the press-fit terminal.

4. 4. The substrate device according to claim 3, wherein the pair of tilt restricting portions are shaped to be point-symmetric when the press-fit terminal is viewed parallel to the thickness direction of the circuit board.

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