JP2012104307A - Connection terminal and manufacturing method for connection terminal rod-like insertion portion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection terminal enabling secure and smooth insertion into an opposite-side hole portion.SOLUTION: In the connection terminal including a four-layer-structured rod-like insertion portion 10 with a substantially rectangular cross section, having a slender band body, formed of a conductive metal plate, folded inside from both sides along a folding line in a longitudinal direction N, notch recess portions 20, 20, 20, 20 formed of notch recess groove portions notched at the tip edge portion of the slender band body before folding are formed at four corners 12, 12, 12, 12 of a tip portion 11 of the rod-like insertion portion 10.

Description

  The present invention relates to a connection terminal and a method for manufacturing a connection terminal bar-shaped insertion portion.

There is a connection terminal that is inserted into a hole portion of a receiving terminal welded to a copper foil circuit of an electronic substrate or a hole portion (through hole) penetrating the copper foil circuit to constitute an electric circuit.
In such a connection terminal (sometimes referred to as a through pin), a rod-shaped insertion portion is formed in a four-layer structure by bending a conductive thin plate material inward, and four points (four Some are configured to contact at the corners. The tip of the rod-shaped insertion part is conical so that the rod-shaped insertion part can be smoothly inserted into the hole on the other side even if there is a misalignment between the rod-shaped insertion part of the connection terminal and the hole on the other side. (See, for example, Patent Document 1 and Patent Document 2).

International Publication WO2005 / 096683 JP 2010-27957 A

The conventional conical shape of the rod-shaped tip portion is a method in which a thin plate material is first bent to form a four-layer rod-shaped insertion portion, and then the tip portion is struck and molded. Processing equipment is required, and it is difficult to stably form the tip portion into a desired cone shape. On the other hand, in the case of a small connection terminal, since the plate thickness of the material is thin, it is difficult to form the tip portion in a cone shape having a sufficient inclination (guide surface).
Therefore, in actual mass production, as shown in FIG. 19, one end edge portion of the conductive thin plate material K ′ is chamfered (chamfered), and thereafter, as shown in FIGS. 21 (a) to (g). The edge portion Kb ′ is bent inward to form a four-layer structure, and as shown in FIG. 20, a rod-shaped insertion portion 10 ′ is formed, and the outer peripheral edge portion of the distal end portion 11 ′ of the rod-shaped insertion portion 10 ′ A chamfered portion 21 'for guide is formed on each side of the above.
However, since chamfering can only be chamfered about half of the plate thickness, the chamfered portion 21 ′ formed on each side of the outer peripheral portion of the tip edge has a small size in the width direction and in the longitudinal direction (about half the plate thickness) However, there is a problem that the tip 11 'cannot be made small enough to be smoothly inserted into the hole on the other side. In other words, conventionally, the tip portion 11 'is formed in a conical shape within a range of dimensions smaller than the plate thickness.

Thus, it was difficult to make the tip of the rod-shaped insertion portion of the connection terminal small enough to be smoothly inserted into the hole on the mating side (because the tip was not of an appropriate shape), so the mating side Insertion (induction) into the hole portion becomes inappropriate, causing buckling of the rod-shaped insertion portion and deformation of the mating terminal.
Therefore, an object of the present invention is to provide a connection terminal that can be reliably and smoothly inserted into a hole on the other side.
Another object of the present invention is to provide a method of manufacturing a connecting terminal bar-shaped insertion part that can be reliably and smoothly inserted into the hole on the other side.

In order to achieve the above object, the connection terminal of the present invention is formed into a substantially quadrangular cross section having a four-layer structure by folding an elongated strip made of a conductive metal plate inward from both sides along a fold line along the longitudinal direction. In the connection terminal provided with the rod-shaped insertion portion, the four corners of the distal end portion of the rod-shaped insertion portion are formed by notched concave grooves cut out at the distal end edge of the elongated strip body before the folding. It has a formed notch recess.
Further, a chamfered portion is formed on each side of the outer peripheral edge of the tip.

  Further, the manufacturing method of the connection terminal rod-shaped insertion portion of the present invention is a method of manufacturing a connection terminal rod-shaped insertion portion that forms a rod-shaped insertion portion having a substantially square cross section by bending an elongated strip made of a conductive metal plate. At the distal end edge of the elongated strip, notched groove portions are formed in the corner formation planned portions corresponding to the four corners of the distal end of the rod-shaped insertion portion, and the elongated strip is extended along the longitudinal direction. In this method, the rod-shaped insertion portion is folded inward from both sides with a folded line to form the rod-shaped insertion portion having a substantially quadrangular cross-section with a four-layer structure, and cutout recesses are formed at the four corners of the tip of the rod-shaped insertion portion. .

Further, the connection terminal of the present invention has a rod-like insertion portion formed in a substantially quadrangular cross section of a four-layer structure by folding an elongated strip made of a conductive metal plate inward from both sides along a fold line along the longitudinal direction. In the connecting terminal provided, the front end of the rod-shaped insertion portion has a stepped portion formed by a wide recess formed at the front end edge of the elongated strip before the folding, and before the folding, It has a small protrusion part formed by the protruding piece part formed in the both sides of the front-end | tip edge part of an elongate strip.
Further, chamfered portions are formed on the outer peripheral edge portion of the stepped portion and the outer peripheral edge portion of the tip surface of the small protrusion portion.

  Further, the manufacturing method of the connection terminal rod-shaped insertion portion of the present invention is a method of manufacturing a connection terminal rod-shaped insertion portion that forms a rod-shaped insertion portion having a substantially square cross section by bending an elongated strip made of a conductive metal plate. A wide concave portion is formed along the width direction at the distal end edge of the elongated strip, and the distal edge of the elongated strip is formed in a concave shape in plan view having projecting pieces on both sides. The elongated strip is folded inward from both sides with a fold line along the longitudinal direction to form a four-layered rod-shaped insertion portion having a substantially rectangular cross section, and a step portion is provided at the tip of the rod-shaped insertion portion. This is a method of forming a small protrusion having a substantially rectangular cross section composed of a protruding piece.

According to the connection terminal of the present invention, the tip end portion of the rod-like insertion portion is small (thin) and can be easily and smoothly inserted into the hole on the other side. It is possible to prevent buckling of the rod-shaped insertion part and deformation of the mating member (mating terminal or substrate). Insertability is improved and insertion can be performed reliably and smoothly.
In addition, according to the method for manufacturing the connecting terminal rod-shaped insertion portion of the present invention, there is no need for a large facility for forming by hitting the tip portion, and the tip portion of the rod-shaped insertion portion is easily formed in an appropriate size and shape. it can. The tip end of the rod-like insertion portion can be made small (thin), and a connection terminal that can be easily and smoothly inserted into the hole on the other side is obtained. It is possible to form a rod-like insertion portion having a tip portion that can prevent buckling of the rod-like insertion portion and deformation of the counterpart member (mating terminal or substrate). It is possible to obtain a connection terminal that is excellent in insertability and can be inserted reliably and smoothly.

It is a top view which shows one Embodiment of this invention. It is a side view which shows one Embodiment. It is AA sectional drawing of FIG. It is an operation explanatory view. It is a principal part expansion perspective view. It is a principal part enlarged front view. It is a principal part enlarged plan view which shows an example of an elongate strip. It is BB sectional drawing of FIG. It is a principal part expansion perspective view which shows an example of an elongate strip. It is process explanatory drawing explaining the manufacturing process of one Embodiment. It is a principal part expansion perspective view which shows other embodiment of this invention. It is a principal part enlarged plan view which shows the other example of an elongate strip. It is process explanatory drawing explaining the manufacturing process of other embodiment. It is a principal part enlarged plan view which shows another example of an elongate strip. It is a principal part enlarged plan view which shows another example of an elongate strip. It is a principal part expansion perspective view which shows the modification of other embodiment of this invention. It is a top view which shows the modification of an elongate strip. It is a perspective view which shows the modification of an elongate strip. It is a principal part expansion perspective view which shows the conventional elongate strip. It is a principal part expansion perspective view of the conventional connection terminal. It is process explanatory drawing explaining the conventional manufacturing process. It is a principal part expansion perspective view which shows another embodiment.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
The connection terminal of the present invention is inserted into a hole of a receiving terminal welded to a copper foil circuit of an electronic board (printed circuit board), a hole (through hole) provided through the copper foil circuit, etc. Is a connection terminal (sometimes referred to as a through pin).
As shown in FIGS. 1 to 3, one embodiment of the present invention has a rod-like insertion portion 10 having a rectangular cross section inserted into a hole on the other end on one end (tip) side.

  The rod-shaped insertion portion 10 is formed by folding a rectangular strip K made of a conductive metal plate from both sides along a folding line along the longitudinal direction N of the strip K, and extending in the width direction W of the strip K. The layer structure has a substantially rectangular cross section. Also, as shown in FIG. 4, it is inserted into a circular hole d on the other side (receiving terminal, printed circuit board, etc.), and is formed in a substantially square cross section so as to contact at four points to ensure conduction. .

5 and 6, the distal end portion 11 of the rod-like insertion portion 10 has a notch recess 20, 20, 20, 20 at a position corresponding to the four corner portions 12, 12, 12, 12 indicated by a two-dot chain line. Is formed. The notch recess 20 is formed in a concavely curved recess shape (a bowl shape).
Further, as indicated by a two-dot chain line, each side 13, 13, 13, 13 of the outer peripheral edge of the tip 11 has a chamfered portion 21 set at an inclination of 30 to 60 degrees. Note that the chamfered portion 21 is desirably set at an inclination of approximately 45 degrees.
Diagonal dimensions L and L of the tip end portion 11 of the rod-like insertion portion 10 by the cut-out recess portion 20 and diagonal dimensions of the portion where the notch recess portion 20 of the rod-like insertion portion 10 is not formed (intermediate portion 9 of the rod-like insertion portion 10). E, smaller than E. That is, the rod-like insertion part 10 is formed in a tapered shape (pointed shape).
As shown in FIGS. 7 to 9, the notch recess 20 is formed by notch recess grooves 31, 31, 31, 31 formed in the elongated belt body K before being folded (in an unfolded state).

A method for manufacturing the connection terminal bar-shaped insertion portion of the embodiment described above will be described.
The elongated strip K made of a thin plate (for example, 0.2 mm) conductive metal plate is rolled so that the elongated strip K has a predetermined thickness (for example, 0.16 mm).

Next, as shown in FIGS. 7 to 9, four round mountain-shaped notch groove portions 31, 31, 31, 31 are provided in the distal end edge portion Ka of the elongated band body K.
The four cut-out recessed groove portions 31 respectively correspond to the four corner portions 12, 12, 12, 12 (see FIG. 5) of the distal end portion 11 of the rod-like insertion portion 10 (see FIG. 5). , 30 are formed by stamping. The corner portion formation scheduled portion 30 is a portion where the corner portion 12 as shown by a two-dot chain line in FIG. 5 is formed when the notched groove portion 31 is not formed. The notch groove 31 is not shown in the figure, but may be a rectangular shape, a semicircular shape, a U shape, a V shape, or the like.

  Further, the front end face Kc of the elongated strip K and the one end edge 32 in contact with one surface (lower surface) Kd of the elongated strip K are chamfered (chamfered) by press working. The one surface Kd is a surface that becomes the outer peripheral surface 10a (see FIG. 5) when the rod-shaped insertion portion 10 is formed. The one end edge 32 is a part for forming each side 13 of the outer peripheral edge of the tip as shown by a two-dot chain line in FIG. .

  Then, as shown in FIG. 10 (a), the side edge portions Kb, Kb on both sides of the elongated belt body K formed with the notch groove portion 31 and chamfered at the one end edge portion 32 are arranged in the longitudinal direction. As shown in FIG. 10 (b), a fold line (folding line) along N is raised from both sides to form a U-shaped cross section, and then folded inward as shown in FIG. 10 (c). The edge portion Kb is laid sideways and bent to form a laminate. Then, along the folding line along the longitudinal direction N, as shown in FIG. 10 (d), it is further folded inward and folded in the width direction W into a four-layer structure. Thereafter, compression is performed from four directions (one side is approximately 0.64 mm) to form a rod-shaped insertion portion 10 having a substantially square cross section.

  By folding into a four-layer structure, as shown in FIGS. 5 and 6, at the tip end portion 11 of the rod-like insertion portion 10, at the locations corresponding to the four corner portions 12, 12, 12, 12 indicated by the two-dot chain line. Notch recesses 20, 20, 20, 20 are formed, and chamfered portions 21 are formed at locations corresponding to the sides 13, 13, 13, 13 of the outer peripheral edge of the tip 11 as shown by the two-dot chain line. . In other words, the tip of the plus driver is formed in the shape of a cruciform protrusion with four corners 12 cut out, and the side of the cruciform projecting portion that contacts the outer peripheral surface 10a of the rod-shaped insertion portion 10 is chamfered. It is formed in a tapered shape (pointed shape).

  Although the connection terminal manufactured in this way is formed of a thin plate material, a strong rod-like insertion portion 10 is obtained by the four-layer structure, and the diagonal dimension L of the tip end portion 11 is small, such as a receiving terminal. A tip shape that can be easily inserted along the mating hole is obtained. The chamfered (relief) dimension of the corner portion 12 (the width direction dimension and the longitudinal dimension of the notch recess 20) can be equal to or larger than the plate thickness dimension of the raw material, and the rod-like insertion portion 10 having better insertability is obtained. Further, by including the chamfering process of each side 13 of the tip part 11 and the chamfering process of each corner part 12 (also referred to as relief or dropping) in the molding process of the rod-shaped insertion part 10, it is easy and Rapid and efficient production is possible.

Next, another embodiment of the connection terminal of the present invention will be described.
As shown in FIG. 11, a small protrusion 70 having a substantially square cross section formed with a stepped portion 60 is provided at the distal end portion 11 of the rod-like insertion portion 10. The diagonal dimension L of the distal end portion 11 (the small projection portion 70 thereof) is made smaller than the diagonal dimension E of the portion where the stepped portion 60 is not formed (the intermediate portion 9 of the rod-like insertion portion 10).

As shown in FIG. 12, the stepped portion 60 is formed by a wide concave portion 51 formed in the distal end edge portion Ka of the elongated strip K before being folded (in an expanded state).
The small protrusion 70 is formed by two rectangular protrusions 52 and 52 disposed on both sides of the tip edge portion Ka.

The manufacturing method of the connection terminal rod-shaped insertion part of other embodiment is demonstrated.
As shown in FIG. 12, a U-shaped wide recess 51 along the width direction W of the elongated band K is formed at the distal end edge portion Ka of the elongated band K.
By forming the wide concave portion 51, the projecting and rectangular projecting piece portions 52, 52 are formed on both sides of the distal end edge portion Ka, and the distal end edge portion Ka of the elongated band K is formed in a concave shape in plan view. Form.

Then, the rod-like insertion portion 10 having a substantially square cross section is formed using the elongated strip K having the tip edge portion Ka in a concave shape in plan view, similarly to the embodiment shown in FIGS.
That is, as shown in FIG. 13 (a), the side edge portions Kb, Kb on both sides of the elongated band K in which the wide concave portion 51 is formed are bent along the longitudinal direction N (folded lines). As shown in (b), after rising from both sides to form a U-shaped cross section, it is folded inward as shown in FIG. And Then, at the fold line along the longitudinal direction N, as shown in FIG. 13 (d), it is further folded inward and folded in the width direction W into a four-layer structure. Then, compress from all sides. As shown in FIG. 11, a stepped portion 60 is formed at the distal end portion 11 by the wide recessed portion 51, and a small protruding portion 70 having a substantially square cross section is formed by combining the two protruding piece portions 52 and 52.

  As shown in FIG. 14, the tip of the rectangular projecting piece 52 may be sharpened in a triangular shape. Further, as shown in FIG. 15, the projecting piece 52 may be formed in a triangular shape in plan view.

  Next, a modification of another embodiment is shown in FIG. Chamfered portions 81 and 91 are formed on the outer peripheral edge portion 62 of the stepped portion 60 and the outer peripheral edge portion 72 of the distal end surface 71 of the small protrusion portion 70 indicated by a two-dot chain line. The chamfered portion 81 of the stepped portion 60 and the chamfered portion 91 of the small protrusion 70 disposed on the same side in a plan view or a side view are formed with the same inclination angle, and are collinear in a plan view or a side view It is formed to become.

The manufacturing method of the connection terminal rod-shaped insertion part of the modification of other embodiment is demonstrated.
As shown in FIG. 12, a wide concave portion 51 is formed at the distal end edge portion Ka of the elongated band body K, and the distal edge portion Ka of the elongated strip body K has a concave shape in plan view having projecting pieces 52, 52 on both sides. 17 or 18, after forming, a step outer peripheral portion planned portion 80 indicated by a two-dot chain line corresponding to the outer peripheral portion 62 of the step portion 60, and a small projection 70 The projected outer peripheral edge portion 90 indicated by a two-dot chain line corresponding to the outer peripheral edge 72 of the distal end surface 71 is chamfered. Thereafter, similarly to the other embodiments shown in FIGS. 11 to 13, the rod-like insertion portion 10 having a substantially rectangular cross section is formed. By folding into a four-layer structure, as shown in FIG. 16, a chamfered portion 81 is formed on the outer peripheral edge 62 of the stepped portion 60 and a chamfered portion 91 is formed on the outer peripheral edge 72 of the distal end surface 71 of the small protrusion 70. To do.

  In another embodiment, the rod-shaped insertion portion 10 having a strong strength is obtained by the four-layer structure while being formed of a thin plate material, and the diagonal dimension L of the tip portion 11 (the small protrusion portion 70) is small, and the receiving terminal A tip shape that can be easily inserted into a counterpart hole such as the above is obtained. The step size can be made equal to the thickness of the material plate, and the small projection 70 is more excellent in insertability. In addition, the modified example includes a step of chamfering the stepped portion 60 and a step of chamfering the tip end surface 71 of the small protrusion portion 70 in the forming step of the rod-shaped insertion portion 10, so that it is easy, quick, and efficient. Can be manufactured with good quality.

Note that the distal end portion 11 of the rod-like insertion portion 10 may be formed as in another embodiment shown in FIG. That is, in FIG. 1 to FIG. 10, the end edge portion 32 of the elongated strip K as already described is folded without performing the surface punching process. Further, after forming as shown in FIG. 22, each side 13, 13, 13, 13 of the outer peripheral edge of the tip 11 may be chamfered to form a chamfer 21 as shown in FIG.
The present invention can be changed in design, and in the manufacturing method of the modified example shown in FIGS. 16 to 18, the elongated insertion body K is folded without forming the chamfering process to form the rod-shaped insertion portion 10, Thereafter, chamfered portions 81 and 91 may be formed on the outer peripheral edge 62 of the stepped portion 60 and the outer peripheral edge 72 of the tip surface 71 of the small protrusion 70. Further, the tip may be further sharpened by press working (plastic working) after the tip 11 is formed.

  The connection terminal shown in FIGS. 1 and 2 has a crimp portion that holds the insulating coating portion of the conductor at the base end portion and a crimp portion that holds the conductor portion of the conductor at the intermediate portion. In the present invention, the shapes of the proximal end portion and the intermediate portion may be shapes other than those illustrated. For example, the base end side is formed in the same manner as the rod-shaped insertion portion 10 described above, the plate portion is a single-letter shape (flat blade shape), or is bent so that the side end edge portion Kb of the elongated band K is abutted. Any one having a double plate shape, one having a T-shape in a plan view having an outer flange portion, one having a side protrusion-like over-insertion preventing protruding piece in the middle portion, etc. is free.

  As described above, the connection terminal of the present invention is formed in a substantially quadrangular cross section having a four-layer structure by folding the elongated strip K made of a conductive metal plate inward from both sides along the folding line along the longitudinal direction N. In the connection terminal provided with the rod-shaped insertion portion 10, the four corner portions 12, 12, 12, 12 of the distal end portion 11 of the rod-shaped insertion portion 10 are connected to the distal end edge portion Ka of the elongated band K before folding. Since it has the notch recessed part 20, 20, 20, 20 formed by the notch recessed groove part 31, 31, 31, 31 which was notched, the front-end | tip part 11 of the rod-shaped insertion part 10 is small (thin), and the other side hole part Can be inserted easily and smoothly. It is possible to prevent buckling of the rod-shaped insertion portion 10 and deformation of the mating member (mating terminal or substrate). Insertability is improved and insertion can be performed reliably and smoothly.

  Further, since the chamfered portion 21 is formed on each side 13 of the outer peripheral edge portion of the distal end portion 11, the chamfered portion 21 can be more smoothly and reliably inserted into the hole on the other side, and the insertion operation can be performed quickly and easily.

  The method for manufacturing a connecting terminal bar-shaped insertion part according to the present invention is a method for manufacturing a connecting terminal bar-shaped insertion part in which a strip-shaped insertion part 10 having a substantially square cross section is formed by bending an elongated strip K made of a conductive metal plate. In addition, at the distal end edge portion Ka of the elongated band K, the corner portion formation scheduled portions 30, 30, 30, 30 corresponding to the four corner portions 12, 12, 12, 12 of the distal end portion 11 of the rod-like insertion portion 10 respectively. In addition, a notch groove 31, 31, 31, 31 is formed, and the elongated strip K is folded inward from both sides by a fold line along the longitudinal direction N to form a four-layered rod-shaped insertion portion 10 having a substantially rectangular cross section. The notch recesses 20, 20, 20, 20 are formed in the four corners 12, 12, 12, 12 of the distal end portion 11 of the rod-like insertion portion 10, so that the distal end portion 11 is hit and molded. A large facility is not required, and the tip portion 11 of the rod-like insertion portion 10 can be easily formed in an appropriate size and shape. The distal end portion 11 of the rod-like insertion portion 10 can be made small (thin), and a connection terminal that can be easily and smoothly inserted into the hole on the other side is obtained. It is possible to form the rod-like insertion portion 10 having the tip portion 11 capable of preventing the buckling of the rod-like insertion portion 10 and the deformation of the counterpart member (the counterpart terminal or the substrate). It is possible to obtain a connection terminal that is excellent in insertability and can be inserted reliably and smoothly.

  Further, the connecting terminal of the present invention is a rod-like insertion formed into a substantially quadrangular cross section of a four-layer structure by folding an elongated strip K made of a conductive metal plate inward from both sides along a folding line along the longitudinal direction N. In the connection terminal provided with the portion 10, the tip portion 11 of the rod-like insertion portion 10 has a stepped portion 60 formed by a wide recess 51 formed on the tip edge portion Ka of the elongated strip K before folding. Since it has the small projections 70 formed by the projecting piece portions 52, 52 formed on both sides of the distal end edge portion Ka of the elongated band K before folding, the distal end portion 11 of the rod-shaped insertion portion 10 is small (thin). It can be easily and smoothly inserted into the hole on the other side. It is possible to prevent buckling of the rod-shaped insertion portion 10 and deformation of the mating member (mating terminal or substrate). Insertability is improved and insertion can be performed reliably and smoothly.

  In addition, since the chamfered portions 81 and 91 are formed on the outer peripheral edge 62 of the stepped portion 60 and the outer peripheral edge 72 of the tip surface 71 of the small protrusion 70, it can be more smoothly and reliably inserted into the hole on the other side. The insertion operation can be performed quickly and easily.

  The method for manufacturing a connecting terminal bar-shaped insertion part according to the present invention is a method for manufacturing a connecting terminal bar-shaped insertion part in which a strip-shaped insertion part 10 having a substantially square cross section is formed by bending an elongated strip K made of a conductive metal plate. Thus, a wide concave portion 51 along the width direction W is formed at the distal end edge portion Ka of the elongated band body K, and the distal end edge portion Ka of the elongated strip body K is concave in plan view having projecting piece portions 52, 52 on both sides. Next, the elongated strip K is folded inward from both sides by a fold line along the longitudinal direction N to form a rod-shaped insertion portion 10 having a four-layer structure and a substantially square cross section, Since the small protrusion 70 having a substantially square cross section composed of the protrusions 52 and 52 is formed at the distal end portion 11 of the rod-like insertion portion 10 with the stepped portion 60, a large facility for hitting and forming the distal end portion 11 is required. The tip portion 11 of the rod-like insertion portion 10 can be easily formed in an appropriate size and shape. The distal end portion 11 of the rod-like insertion portion 10 can be made small (thin), and a connection terminal that can be easily and smoothly inserted into the hole on the other side is obtained. It is possible to form the rod-shaped insertion portion 10 having the distal end portion 11 that can prevent buckling of the rod-shaped insertion portion and deformation of the mating member (mating terminal or substrate). It is possible to obtain a connection terminal that is excellent in insertability and can be inserted reliably and smoothly.

10 Rod insert
11 Tip
12 corners
13 sides
20 Notch recess
21 Chamfer
30 Corner formation planned part
31 Notch groove
51 Wide recess
52 Projection
60 steps
62 Outer periphery
70 Small protrusion
71 Tip surface
72 Outer periphery
81 Chamfer
91 Chamfer
K elongated strip Ka tip edge N longitudinal direction W width direction

Claims (6)

A long and narrow strip (K) made of a conductive metal plate is folded inward from both sides by a fold line along the longitudinal direction (N) to form a rod-shaped insertion portion (10) formed in a substantially quadrangular cross section having a four-layer structure. In the connection terminal provided,
The four edge portions (12), (12), (12), and (12) of the distal end portion (11) of the rod-shaped insertion portion (10) are connected to the distal end edge portion (Ka) of the elongated strip (K) before the folding. A connection terminal having a notch recess (20) (20) (20) (20) formed by a notch recess groove (31) (31) (31) (31).   The connection terminal according to claim 1, wherein a chamfered portion (21) is formed on each side (13) of the outer peripheral edge portion of the distal end portion (11). In a method for manufacturing a connecting terminal bar-shaped insertion part, which is formed by bending a long strip (K) made of a conductive metal plate to form a bar-shaped insertion part (10) having a substantially rectangular cross section,
Corresponds to the four corners (12) (12) (12) (12) of the tip (11) of the rod-like insertion part (10) at the tip edge (Ka) of the elongated strip (K). Cut-out recessed groove portions (31), (31), (31), and (31) are formed in the corner portion formation scheduled portions (30), (30), (30), and (30), and the elongated strip (K) is moved in the longitudinal direction ( N) is folded inward from both sides along a fold line along the line N) to form the rod-shaped insertion portion (10) having a substantially quadrangular cross-section with a four-layer structure, and 4 at the tip (11) of the rod-shaped insertion portion (10). A method of manufacturing a connecting terminal rod-like insertion portion, wherein notched recesses (20), (20), (20), and (20) are formed in the corner portions (12), (12), (12), and (12). A long and narrow strip (K) made of a conductive metal plate is folded inward from both sides by a fold line along the longitudinal direction (N) to form a rod-shaped insertion portion (10) formed in a substantially quadrangular cross section having a four-layer structure. In the connection terminal provided,
A stepped portion (60) formed at the distal end (11) of the rod-shaped insertion portion (10) by a wide recessed portion (51) formed at the distal end edge (Ka) of the elongated strip (K) before the folding. ) And a small protrusion (70) formed by projecting pieces (52) (52) formed on both sides of the front edge (Ka) of the elongated strip (K) before the folding. A connection terminal characterized by that.   A chamfered portion (81) (91) is formed on the outer peripheral edge portion (62) of the stepped portion (60) and the outer peripheral edge portion (72) of the tip end surface (71) of the small protrusion portion (70). Item 5. The connection terminal according to Item 4. In a method for manufacturing a connecting terminal bar-shaped insertion part, which is formed by bending a long strip (K) made of a conductive metal plate to form a bar-shaped insertion part (10) having a substantially rectangular cross section,
A wide concave portion (51) along the width direction (W) is formed at the distal end edge (Ka) of the elongated strip (K), and the distal end edge (Ka) of the elongated strip (K) is disposed on both sides. Are formed in the shape of a concave shape in plan view, and then the elongated strip (K) is folded inward from both sides by a fold line along the longitudinal direction (N). A rod-shaped insertion portion (10) having a substantially quadrangular cross section with a four-layer structure is formed, and the protruding portion (52) (52) has a stepped portion (60) at the tip (11) of the rod-shaped insertion portion (10). And a small protrusion (70) having a substantially square cross section.

Images