JP4735173B2 - Press-fit terminal and manufacturing method thereof - Google Patents

Description

  The present invention relates to a press-fit terminal that is press-fitted into a through-hole of a substrate, is electrically connected to the through-hole, and is mechanically fixed, and a manufacturing method thereof.

As shown in FIG. 8, a press-fit terminal is generally formed by forming terminal portions 11 and 12 at both ends of a rod-shaped member, one of which is a press-fit, and a retaining portion 13 formed in the middle. For example, in an anti-lock brake system (ABS) actuator unit for an automobile, a power connector and a control connector 2 are provided on the outer surface of the casing 1 as shown in FIG. It is provided and used as a connection terminal from the connector 2 to the control board 3 (see Patent Document 2).
JP 2004-22169 A Japanese Patent Laid-Open No. 10-208798

As shown in FIGS. 9 and 10, the press-fit terminal 10 is embedded in the casing 1 during resin molding (insert resin molding) or press-fitted into a hole in the casing 1. . At this time, integration with the casing 1 is achieved by biting the retaining portion 13 into the molding resin.
When the control board 3 is loaded into the casing 1 provided with the press-fit terminal 10 as shown by arrows in FIGS. 9 and 10, the press-fit terminal portion 11 is press-fitted into the through hole 4 of the board 3 while being compressed. The terminal 10 (press-fit terminal portion 11) is fixed to the substrate 3 by a repulsive force due to compression, and is electrically connected to a circuit on the substrate 3 via a connection conductor 4a on the inner surface of the through hole 4 (Patent Document). 2). In the figure, 5 is an electronic component incorporated in the circuit.

  As a manufacturing method of the press fit terminal 10, as shown in FIG. 11, the rod-like member 7 is punched from the flat plate 6, and at the time of punching, the terminal portion 12 and the retaining portion 13 are formed, and the press fit terminal portion 11 is pressed. There is something to form by.

  In the press-fit terminal 10 manufactured by this manufacturing method, the concavo-convex portion of the retaining portion 13 protrudes or sinks from the outer surface of the rod-shaped member 7. For this reason, the connection of the rod-shaped member 7 in the flat plate 6 becomes an aspect shown by the chain line in FIG. In this connection, there is a lot of material waste (debris member) a, and the number of press-fit terminals 10 taken from one flat plate 6 is small. This material waste a needs to be improved today as cost reduction is required.

  This invention makes it a subject to reduce the waste meat a.

In order to achieve the above object, according to the present invention, a press-fit terminal portion and a retaining portion are formed by pressing a rod-shaped member.
In the rod-shaped member, the cut line of the flat plate is almost linear, and the waste a is reduced as much as possible (see FIG. 1). Further, the rod-like member can be obtained at low cost by pulling out.
On the other hand, according to press working, it is easy to form irregularities, and the formation can be performed by a single working. Further, the degree of formation of the unevenness (the degree of protrusion of the convex part) can also be adjusted by the degree of squeezing (depth degree) of the concave part during pressing.

  As described above, since the press-fit terminal portion and the retaining portion are formed by pressing the rod-shaped member as described above, an inexpensive press-fit terminal can be obtained and the manufacturing cost is also increased. It will be cheap.

  As an embodiment of the present invention, in a press-fit terminal in which both ends of a rod-shaped member are used as terminal portions and one of them is a press-fit, and a retaining portion is formed in the middle thereof, the press-fit terminal portion is a pair with a bending space interposed therebetween. The retaining portion is formed of a concavo-convex portion, and the press-fit terminal portion and the retaining portion are a pair of elastic abutting portions and concavo-convex sandwiching the bending space by pressing a rod-shaped member. The structure formed by forming the portion can be employed.

If the said uneven | corrugated | grooved part is an aspect which exhibits a bite-in function, the aspect is arbitrary, For example, it can be assumed that it is wavy in the axial direction of the said rod-shaped member. As the wavy shape, not only a curved shape but also a saw blade shape (V groove shape) can be considered.
Further, if the convex part of the concave and convex part protrudes from the outer surface of the rod-shaped member, when the press fit terminal is inserted during resin molding of the casing (when insert resin molding is performed), the concave and convex part has a biting function. In addition, when the press-fit terminal is attached to the casing by press-fitting the concave and convex portion (retaining portion) into the hole of the casing, the retaining portion bites into the inner surface of the hole of the casing, The bite is good and the press-fit terminal can be securely attached to the casing.

  The press-fit terminals having this configuration can be manufactured by various conventional well-known manufacturing methods. For example, a pair of gold contacts having a pressing surface corresponding to the pair of elastic contact portions and the concavo-convex portions sandwiching the bending space. A pair of elastic abutting portions and concavo-convex portions sandwiching the bending space are formed by pressing a pair of molds between the molds and aligning the pair of molds with the rod-shaped member interposed therebetween. Can do.

At this time, terminal portions other than the press-fit terminal portion can be formed by pressing, but if the rod-shaped member is punched from a flat plate, a terminal portion other than the press-fit terminal portion is formed by punching. You can also
Further, if the rod-shaped member is punched from a flat plate, it is preferable to form the uneven portion of the retaining portion on the punched surface by pressing. In general, since the punched surface is rough, the uneven surface of the surface has a high retaining action.

If the bar-shaped member is a drawn bar, not only a pair of elastic contact portions and uneven portions sandwiching the bending space but also terminal portions other than the press-fit terminal portions are formed by pressing. .
It is preferable that the number of times of press work is small, and as much as possible, the pair of elastic contact portions and uneven portions sandwiching the bending space, or the pair of elastic contact portions and uneven portions sandwiching the bending space as much as possible. And terminal parts other than the press-fit terminal part are formed.

  One embodiment is shown in FIGS. 1 and 2, and in this embodiment, as shown by a chain line in FIG. 1, first, a rod-like member having the same thickness except for the terminal portion 12 other than the press-fit terminal portion 11 from the flat plate 6. 17 is obtained by punching. At the time of punching, the terminal portion 12 other than the press-fit terminal portion 11 is tapered to generate a scrap member a indicated by a chain line. However, the scrap member a is small, much more than the conventional one in FIG. Small and there is little waste of materials.

  Next, as shown in FIG. 2, the rod-like member 17 is placed between a pair of molds 18, 18 having a press surface corresponding to the pair of elastic contact portions 11b and the concavo-convex portion 13a with the bending space 11a interposed therebetween. By interposing the pair of molds 18 and 18 as shown by arrows, the pair of elastic contact portions 11b and 11b and the concavo-convex portion 13a sandwiching the bending space 11a are pressed to form the bending space 11a. The press-fit terminal 10 shown in FIG. 1 is obtained in which the press-fit terminal portion 11 is formed by the sandwiched pair of elastic contact portions 11b and 11b and the retaining portion 13 is formed by the uneven portion 13a.

  In this press-fit terminal 10, the bending space 11 a and the uneven portion 13 a are recessed in the same direction toward the axis of the rod-shaped member 17, the bending space 11 a is parallel to the axis, and the uneven portion 13 a is not parallel to the axis. For example, the ABS actuator unit shown in FIG. 9 is used as inserted in the resin molding of the casing 1 shown in FIG. In this embodiment, when the press-fit terminal portion 11 enters the through hole 4 of the substrate 3, the pair of elastic contact portions 11b are press-fitted while being compressed into the bending space 11a, and the repulsive force due to the compression causes the terminal 10 to be inserted. In addition to being fixed to the substrate 3, it is electrically connected to the circuit on the substrate 3 via the connection conductor 4a on the inner surface of the through hole 4.

  As shown in FIG. 4, if the tip of the press-fit terminal portion 11 has a tapered shape such as a circular arc surface, the press-fit terminal portion 11 can be easily fitted into the through hole 4 of the substrate 3. Moreover, as shown in FIG. 5, the rod-shaped member 17 can be obtained by drawing. In this case, the cross-sectional shape of the rod-shaped member 17 is not limited to the circular shape shown in the figure, and may be any shape such as an elliptical shape, a square shape, a square shape such as a hexagon, and the like.

  As for the other terminal part 12, as shown in FIG. 1, FIG. 4, it is preferable that the four sides are tapered. In this case, at the time of punching the rod-shaped member 17 from the flat plate 6, the two surfaces (left and right surfaces in FIG. 1) may be tapered by the punching press, and before and after the pressing shown in FIG. The taper of the two surfaces may be obtained by pressing the upper and lower surfaces of the figure.

  As shown in FIG. 6, in the ABS actuator unit in which the power connector and the control connector 2 are provided on the outer surface of the casing 1, the press-fit terminal 10 can be bent in an L shape.

In the press-fit terminal 10 of each of the above-described embodiments, as shown in FIGS. 7A to 7C, when the retaining portion 13 is formed by press working, the convex portion of the concave-convex portion 13a is the bar member 17 after pressing. It can be made to protrude from the outer surface (outer surface of the main body of the press-fit terminal 10), that is, the width w of the convex portion can be made larger than the width t of the rod-shaped member 17 (press-fit terminal 10). At this time, as shown in FIG. 5C, the convex portions project on both sides of the rod-shaped member 17, but only one side may be projected, or even if all the convex portions are projected, a part of the convex portions is projected. You may overhang.
The overhanging degree is appropriately set in consideration of the following biting degree, and the overhanging degree (projection degree) of the convex part is appropriately adjusted according to the degree of constriction of the concave part during pressing.

  If the convex portion protrudes in this way, when the press-fit terminal 10 is inserted during resin molding of the casing 1, the biting function of the concave and convex portion 13 a (prevention portion 13) is improved, and the hole of the casing 1 is improved. When the uneven portion 13a is press-fitted and the press-fit terminal 10 is attached to the casing 1, the retaining portion 13 bites into the hole inner surface of the casing 1, and both the bites 1 and 13 are well bitten. The terminal 10 can be firmly attached to the casing 1.

Production explanatory diagram of one embodiment Production explanation drawing One usage diagram of the embodiment Production explanatory diagram of another embodiment Production explanatory diagram of another embodiment Other usage patterns of the embodiment Other embodiments are shown, (a) is a modification of the embodiment shown in FIG. 1, (b) is a modification of the embodiment shown in FIG. 5, and (c) is an enlarged plan view of a main part of each embodiment. Front view of conventional example Outline exploded perspective view of actuator unit for ABS Installation diagram of the actuator unit board Conventional production explanatory drawing

Explanation of symbols

1 ABS actuator unit casing 2 Connector in same casing 3 Control board 4 Through hole 5 Electronic component 10 Press-fit terminal 11 Press-fit terminal portion 11a Deflection space 11b of press-fit terminal portion Elastic contact portion 12 of press-fit terminal portion, etc. Terminal portion 13 retaining portion 13a uneven portion of retaining portion

Claims (8)

In the press-fit terminal (10) in which both ends of the rod-shaped member (17) are the terminal portions (11, 12) and one of them (11) is the press-fit, and the retaining portion (13) is formed in the middle.
The press-fit terminal portion (11) is composed of a pair of elastic contact portions (11b, 11b) sandwiching the bending space (11a), and the retaining portion (13) is composed of a concavo-convex portion (13a). The terminal portion (11) and the retaining portion (13) are a pair of elastic contact portions (11b, 11b) and an uneven portion (13a) sandwiching the bending space (11a) by pressing the rod-shaped member (17). to form a are formed, and the rod-shaped member (17) is not more things punched from a flat plate (6), the said retaining portion to blanked surface uneven portion (13) (13a) the shape formed A press-fit terminal characterized by being made.   The press-fit terminal according to claim 1, wherein the uneven portion (13a) is wavy in the axial direction of the rod-shaped member (17). The press-fit terminal according to claim 1 or 2 , wherein the convex portion of the concave-convex portion (13a) protrudes from the outer surface of the rod-like member (17). While the two ends of the bar-like member (17) terminal portion as (11, 12) and (11) as a press fit, to form a stop portion (13) missing in the middle, before Symbol press-fit terminal portions (11) elastic deflection abutment pairs across the space (11a) (11b, 11b) consists, before Symbol retaining portion (13) is made concavo-convex portion (13a), stopping the press-fit terminal portions (11) and exit The part (13) is formed by pressing the bar-like member (17) to form a pair of elastic contact parts (11b, 11b) and an uneven part (13a) sandwiching the bending space (11a). A method for manufacturing a press-fit terminal (10), comprising:
A rod-like member (17) between a pair of molds (18, 18) having a press surface corresponding to the pair of elastic contact portions (11b, 11b) and the concavo-convex portion (13a) sandwiching the bending space (11a). The pair of molds (18, 18) are joined together via the rod-like member (17), so that the pair of elastic contact portions (11b) and the concavo-convex portion sandwiching the bending space (11a) (13a) A press-fit terminal manufacturing method, which is formed by pressing. It is a manufacturing method of the press fit terminal (10) in any one of Claims 1 thru | or 3 , Comprising: A pair of elastic contact part (11b, 11b) and uneven | corrugated | grooved part (13a) which pinched | interposed the said bending space (11a) A bar-shaped member (17) is interposed between a pair of molds (18, 18) having a press surface corresponding to the above, and the pair of molds (18, 18) are aligned with the bar-shaped member (17) interposed therebetween. Thus, a method for producing a press-fit terminal, comprising: forming a pair of elastic contact portions (11b) and uneven portions (13a) sandwiching the bending space (11a) by pressing. When punching from flat plate (6) of said rod member (17), by its punching, the production of press-fit terminal according to claim 5, characterized in that in order to form the other terminal portion (12) Method. 5. The method of manufacturing a press-fit terminal (10) according to claim 4 , wherein when the bar-shaped member (17) is a drawn bar, the pair of molds (18, 18) is interposed with the bar-shaped member (17). Thus, not only the pair of elastic contact portions (11b, 11b) and the concavo-convex portion (13a) sandwiching the bending space (11a) but also the other terminal portion (12) is pressed. A method for manufacturing a press-fit terminal, characterized by comprising: The press-fit terminal manufacturing method according to any one of claims 4 to 7 , wherein the press work is performed once.

Images