JP2004319338A - Press fit terminal and connector for base board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press fit terminal and a connector for a base board capable of securing good operability when press fitting a terminal. <P>SOLUTION: The connector for a base board C is composed of a housing 10 to be fixed on a circuit board P to which a plurality of press fit terminals 20 are mounted in a row in a lateral width direction. An electric connection part 23 and a jig contact part 27 are arranged at one end part of the terminal 20. The electric connection part 23 comes in contact and is electrically connected with a conductive part 41 formed on the inner periphery of a through-hole 40 when the electric connection part 23 is inserted into the through-hole 40 with pressure while making a press fitting jig 50 contact the jig contact part 27. Since a wall removed part 31 is formed at a curved part 30 of the terminal 20 by removing both edge parts at an inner peripheral side, outward swelling, caused by run-off of the inner peripheral side of the wall when the terminal 20 is bent, is prevented. By the above, interference between the press fitting jig and the run-off part of the wall does not cause any trouble, and the good operability is secured. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a press-fit terminal and a board connector provided with the press-fit terminal.
[0002]
[Prior art]
In recent years, a press-fit type terminal has been widely used as a terminal that is inserted into a through hole of a circuit board and is used to establish an electrical connection with a conductive portion formed on the inner periphery thereof (for example, see Patent Document 1). 1). One example is shown in FIG. 9 and FIG. This has a configuration in which a plurality of press-fit terminals 2 are assembled in parallel in a width direction on a synthetic resin housing 1 fixed to a circuit board P. Each of the press-fit terminals 2 has an L-shaped bent portion extending out of the housing 1, and a pair of electric connection portions 3 formed outwardly in a substantially arcuate shape at the ends thereof. A pair of jig abutments 4 are formed on the base end side of the electrical connection 3 so as to protrude in the width direction. When assembling this connector to the circuit board P, the comb-shaped pressing portion 5A of the press-fitting jig 5 is inserted from above into the space between the terminals 2 and its tip is attached to the upper edge of the jig abutting portion 4 of each terminal 2. The electric connection part 3 is pushed into the through hole 6 of the circuit board P while being abutted. Then, the two electric connection portions 3 are elastically deformed so as to close inward, and are pressed against the conductive portion 7 on the inner periphery of the through hole 6 by the elastic force in the opening direction to make an electric connection.
[0003]
[Patent Document 1]
DE-A-196 08 168 A1
[Problems to be solved by the invention]
By the way, when the above-mentioned terminal 2 is bent in an L-shape, the flesh on the inner peripheral side of the bent portion 8 may escape to the outside in the width direction and the overhang portion 9 may be formed on the side surface of the bent portion 8. (W _T1 <W _T2 ). To avoid interference between the protruding portion 9 and the press-fitting jig 5 is a width dimension W _G between the pressing portion 5A is required to be set sufficiently large, whereupon the pressing portion 5A and the jig abutting portion 4, the pressing margin 5A is likely to be disengaged from the jig abutment 4, and the workability of press-fitting the terminal 2 is deteriorated.
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a press-fit terminal and a board connector capable of ensuring workability in press-fitting a terminal.
[0005]
[Means for Solving the Problems]
The press-fit terminal according to the first aspect of the present invention for solving the above-mentioned problem is inserted into a through hole of a circuit board, and establishes electrical connection with a conductive portion formed on the inner periphery of the through hole. A terminal which is bent at one end from a bent portion, and provided at its tip with a jig contact portion protruding in the width direction and an elastically or plastically deformable electric connection portion, wherein the jig is provided. When the electric connection portion is press-fitted into the through-hole while the press-fitting jig is in contact with the contact portion, the electric connection portion comes into contact with the conductive portion so that an electric connection is established. Is characterized in that a thinned portion formed by cutting both side edges on the inner peripheral side thereof is formed.
[0006]
A second aspect of the present invention is characterized in that, in the first aspect, the cut surface of the thinned portion is an inclined surface that is directed inward in the width direction as it goes to the inner peripheral side. .
[0007]
A board connector according to a third aspect of the present invention is a connector in which a plurality of terminals are provided in parallel in a housing fixed to a circuit board. A jig contact portion that protrudes in the width direction and an elastic or plastically deformable electric connection portion are provided, and the electric connection portion is connected to the through-hole while a press-fit jig is brought into contact with the jig contact portion. When the press-fitting is performed, the electric connection portion is brought into contact with a conductive portion formed on the inner periphery of the through hole so that an electric connection is established. The feature is that a thinned portion formed by cutting off a portion is formed.
[0008]
Function and Effect of the Invention
According to the first and third aspects of the present invention, since the thinned portions formed by cutting off both side edges on the inner peripheral side are formed in the bent portion, when the terminal is bent, the inner peripheral side of the bent portion is formed. It is possible to prevent the meat from escaping and protruding outward. As a result, when the terminal is press-fitted, the interference between the press-fitting jig and the protruding portion on the side surface of the bent portion does not become a problem as in the related art, so that the width dimension of the press-fitting jig can be made sufficiently large. The overlap margin between the tool and the jig contact portion is secured, and workability can be secured.
[0009]
According to the second aspect of the present invention, in the bent portion, the amount of meat that escapes increases toward the inner peripheral side. Therefore, in the related art, the protrusion amount of the overhang tends to increase toward the inner peripheral side. However, in this configuration, in accordance with this configuration, since the cut surface of the thinned portion has an inclined surface that is directed inward in the width direction as it goes to the inner peripheral side, the amount of cut meat is reduced. It can be reduced, and a decrease in strength at the bent portion can be suppressed.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
<First embodiment>
Next, a first embodiment of the present invention will be described with reference to FIGS.
The board connector C of this embodiment includes a housing 10 made of a synthetic resin and a plurality of press-fit terminals 20 (hereinafter, referred to as terminals). The housing 10 has a box shape with an open front surface (the right side in FIG. 1), and is fixed on the circuit board P. A plurality of terminal press-in holes 11 through which the terminals 20 are inserted are formed in the rear wall of the housing 10 in a lateral direction (a direction perpendicular to the paper surface of FIG. 1).
[0011]
As shown in FIG. 2, the terminal 20 is formed in an elongated rectangular bar shape as a whole by pressing a metal plate having excellent conductivity. The terminal 20 is formed by pressing a tab portion 21 formed at one end thereof into the terminal press-fitting hole 11 of the housing 10 from the rear, and then bent into an L-shape, and the electric connection portion 23 provided at the other end is provided. It is inserted into the through hole 40 of the circuit board P.
As shown in FIG. 4, the circuit board P has various conductive paths 41 formed on the surface, and has a large number of through holes 40. A conductive portion 42 is formed on the inner periphery of the through hole 40 by plating or the like, and is connected to the conductive path 41.
[0012]
On the base end side of the tab portion 21, a pair of retaining portions 24 and a pair of positioning portions 25 are formed to protrude in the width direction. The edge of the retaining portion 24 is tapered so that the terminal 20 can be pressed into the terminal press-in hole 11 from the tab portion 21 side, and the edge on the opposite side is steeply prevented from coming off. The edge of the positioning portion 25 near the front end is steep, and when the press-fitting is performed, the terminal 20 is positioned by engaging with the edge of the terminal press-in hole 11.
[0013]
The electric connection portions 23 are provided in a pair at the end opposite to the tab portion 21, and each of the electric connection portions 23 is formed in a thick band shape, and is sandwiched between thin portions 26 that can be elastically or plastically deformed. The bulge is formed in a substantially circular arc shape, and the tip is tapered. The maximum diameter of both electrical connection portions 23 is larger than the inner diameter of conductive portion 42 of through hole 40 by a predetermined amount. The electrical connection portion 23 is inserted into the through hole 40 and electrically connected to the conductive portion 42 by compressing the thin portion 26 in the radial direction while compressively deforming the thin portion 26. On the base end side of the electric connection portion 23, a pair of jig contact portions 27 for applying a press-fitting jig 50 described later is formed so as to protrude in the lateral width direction.
[0014]
The terminal 20 is bent at approximately 90 degrees at a predetermined portion of an elongated intermediate portion 28 formed between the positioning portion 25 and the jig contact portion 27, and the bent portion is a bent portion 30. In the intermediate portion 28, a thinned portion 31 is formed by cutting off both side edges on the surface side that becomes the inner periphery of the bent portion 30 in a tapered shape over the entire region in the length direction. More specifically, as shown in FIG. 3, in the thinned portion 31 of the bent portion 30 (intermediate portion 28), as the cut surface goes toward the inner peripheral side (the lower side in FIG. 3), the inner side in the width direction is increased. , In other words, the width of the bent portion 30 (the intermediate portion 28) gradually decreases toward the inner peripheral side.
[0015]
Next, the operation of the present embodiment will be described.
The terminal 20 is punched out by a press in the form shown in FIG. 2, and at this time, the thinned portion 31 is also formed at the same time. Then, the tab portion 21 of the terminal 20 is pressed into the terminal press-fitting hole 11 of the housing 10 from behind. After all the terminals 20 are mounted on the housing 10, a portion of each terminal 20 from the bent portion 30 to the electrical connection portion 23 is bent downward at substantially a right angle. Here, when the terminal 20 is bent, the flesh on the inner peripheral side of the bent portion 30 may escape to the outside in the width direction. The bent portion 30 is prevented from projecting outside the original width dimension.
[0016]
The electric connection part 23 is inserted into the through hole 40 using the press-fitting jig 50. The press-fitting jig 50 is provided with a plurality of flat pressing portions 51 in parallel with the terminals 20 at the same pitch to form a comb-like shape. The width between the pressing portions 51 is slightly larger than the width of the intermediate portion 28 of the terminal 20 and smaller than the width of the jig contact portion 27 of the terminal 20.
The board connector C is held above the circuit board P such that each electrical connection portion 23 of the terminal 20 is located directly above the corresponding through hole 40 of the circuit board P. Subsequently, as shown in FIG. 4, each pressing portion 51 of the press-fitting jig 50 is inserted between the terminals 20 from above. At this time, since the side surface of each bent portion 30 of the terminal 20 has no projecting portion as in the related art, the pressing portion 51 is smoothly inserted between the terminals 20. Then, the tip of each pressing portion 51 is abutted against the upper edge of the jig abutting portion 27, and the board connector C is lowered together with the press-fitting jig 50 as it is.
[0017]
As the electrical connection portions 23 are inserted into the through holes 40, the electrical connection portions 23 abut against the periphery of the through hole 40 and undergo elastic or plastic deformation so as to close inward. The insertion operation is stopped when it is pushed to a predetermined depth (see FIG. 5). Accordingly, the electric connection portions 23 are pressed against the inner periphery of the through hole 40 by receiving the elastic force in the extending direction of the thin portion 26 and the elastic force in the opening direction of the electric connection portion 23 itself. As a result, the terminal 20 is electrically connected to the conductive portion 42 formed on the inner periphery of the through hole 40 while being held in such a manner that the terminal 20 does not come off from the through hole 40.
[0018]
As described above, according to the present embodiment, the bent portions 30 are formed with the thinned portions 31 in which both side edges on the inner circumferential side are cut off, so that when the terminal 20 is bent, the inner circumferential portions of the bent portions 30 are bent. The flesh on the side can be prevented from escaping and protruding outward. Thus, when the terminal 20 is press-fitted, the interference between the press-fitting jig and the projecting portion on the side surface of the bent portion does not become a problem as in the related art, and the width of the pressing portion 51 of the press-fitting jig 50 should be sufficiently large. Therefore, the overlap margin between the press-fitting jig 50 and the jig abutting portion 27 is secured, and workability can be secured.
[0019]
Also, in the bent portion 30, the amount of meat that escapes increases toward the inner peripheral side, so that in the conventional one, the protrusion amount of the overhang portion 9 tends to increase toward the inner peripheral side. Accordingly, in the present embodiment, since the cut surface of the thinned portion 31 is an inclined surface that is directed inward in the width direction as it goes to the inner peripheral side, the amount of cut meat can be reduced, A decrease in strength at the bent portion 30 is suppressed.
[0020]
<Other embodiments>
The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. Can be implemented with various modifications. In the following description, portions having the same functions as those in the first embodiment will be denoted by the same reference numerals, and redundant description will be omitted.
(1) In the above-described embodiment, the thinned portion 31 is provided over the entire area of the intermediate portion 28. However, for example, as in the terminal 60 shown in FIGS. May be provided.
(2) In the first embodiment, the cut surface of the thinned portion 31 is flat. However, for example, as shown in FIG. 8A, the cut surface of the thinned portion 62 may be a curved inclined surface. good. Also in this case, since the cut surface of the thinned portion 62 is an inclined surface that is directed inward in the width direction as it goes to the inner peripheral side, the strength of the bent portion 30 decreases as in the first embodiment. Is suppressed. Further, as shown in FIG. 8 (B), a case in which both side edges on the inner peripheral side of the bent portion 30 are cut in steps to form the thinned portion 63 is also included in the technical scope of the present invention. .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a board connector according to a first embodiment of the present invention. FIG. 2 is a bottom view of a press-fit terminal before bending. FIG. 3 is a cross-sectional view of a press-fit terminal. FIG. 5 is a partial cross-sectional view showing a state before press-fitting a terminal into a through-hole. FIG. 5 is a partial cross-sectional view showing a state after press-fitting a press-fit terminal into a through-hole. FIG. 6 shows a press-fit terminal according to another embodiment. FIG. 7 is a side view of a press-fit terminal according to another embodiment. FIGS. 8A and 8B are cross-sectional views of a press-fit terminal according to another embodiment. FIG. FIG. 10 is a cross-sectional view of a board connector in an example. FIG. 10 is a partial cross-sectional view showing a state before press-fitting a press-fit terminal in a conventional example into a through-hole.
C: Board connector P: Circuit board 10: Housing 20, 60 ... Press-fit terminal 23 ... Electric connection part 27 ... Jig contact part 30 ... Bending part 31, 61, 62, 63 ... Filling part 40 ... Through hole 42 ... Conductive part 50 ... Press-fitting jig

Claims (3)

A terminal that is inserted into a through hole of a circuit board and is used for establishing electrical connection with a conductive portion formed on the inner periphery of the through hole,
One end is bent from the bent portion, and a jig contact portion that protrudes in the width direction and an electric connection portion that can be elastically or plastically deformed are provided at the tip portion, and a press-fit jig is applied to the jig contact portion. When the electrical connection portion is press-fitted into the through hole while being in contact with the electrical connection portion, the electrical connection portion comes into contact with the conductive portion so that an electrical connection is obtained.
A press-fit terminal, wherein a thinned portion formed by cutting off both side edge portions on the inner peripheral side of the bent portion is formed. 2. The press-fit terminal according to claim 1, wherein the cut surface of the thinned portion is an inclined surface that goes inward in the width direction as it goes to the inner peripheral side. 3. A connector in which a plurality of terminals are provided in parallel in a housing fixed to a circuit board,
One end of the terminal is bent from the bent portion, and a jig contact portion that protrudes in the width direction and an electric connection portion that is elastically or plastically deformable are provided at a tip portion thereof, and is press-fitted into the jig contact portion. When the electric connection portion is press-fitted into the through-hole while the jig is in contact with the jig, the electric connection portion comes into contact with a conductive portion formed on the inner periphery of the through-hole so that an electric connection is established. At
The board connector according to claim 1, wherein the bent portion is formed with a thinned portion formed by cutting both side edges on the inner peripheral side.

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