JP2015041540A - Terminal and connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate manufacture by forming a pair of grooves, extending in the longitudinal direction while facing each other, in the side face of a terminal to be inserted into a through hole formed in a terminal holding plate, thereby preventing the terminal holding plate from being cracked or deformed, and to reduce the cost by simplifying the configuration.SOLUTION: A terminal 61 to be inserted into a through hole formed in a terminal holding plate of a connector 10 is provided, in the side face including at least a range where the through hole penetrates, with a pair of grooves extending in the longitudinal direction while facing each other. When it is assumed that the grooves are not formed, a cross sectional shape of the terminal 61 is similar to that of the through hole and larger than the cross section of the through hole.

Description

  The present invention relates to a terminal and a connector.

  Conventionally, a connector for a board is used to connect a cable or the like to a circuit board such as a printed circuit board (for example, see Patent Document 1). Such a connector is fitted on a mating connector, one attached to a circuit board and the other connected to an end of a cable or the like.

  FIG. 9 is a perspective view of a main part of a conventional connector.

  In the figure, reference numeral 816 denotes a bottom plate of the connector housing, which is a plate-like member made of an insulating material such as a resin, and has a plurality of terminal insertion holes extending in the plate thickness direction. Yes. Reference numerals 861 denote metal terminals of the connector, which are press-fitted into the corresponding terminal insertion holes. The portions other than the bottom plate of the housing are not shown.

  Here, the terminal 861 is a pin-shaped member having a rectangular cross section, an intermediate portion is held by the bottom plate 816, and both ends protrude from the upper and lower sides of the bottom plate 816. The upper end of each terminal 861 is inserted into a corresponding through hole of a circuit board (not shown) disposed in parallel with the bottom plate 816. Further, the lower end of each terminal 861 is connected to a corresponding counterpart terminal of a counterpart connector (not shown) fitted to the connector.

Japanese Patent No. 2732570

  However, in the conventional connector, since the terminal 861 is press-fitted into a terminal insertion hole formed slightly smaller than the outer shape of the terminal 861, the terminal 861 is press-fitted into the terminal insertion hole. In other words, the peripheral portion of the terminal insertion hole in the bottom plate 816 is pushed away, which may cause the bottom plate 816 to crack or the bottom plate 816 to be greatly deformed.

  The present invention solves the above-mentioned conventional problems, and forms a pair of grooves extending in the longitudinal direction on the side surface of the terminal inserted through the through hole formed in the terminal holding plate so as to face each other. Thus, it is possible to prevent a terminal holding plate from being cracked, deformed, and the like, and to provide a terminal that is easy to manufacture, has a simple configuration, and is low in cost, and a connector having the terminal.

  Therefore, in the terminal of the present invention, the terminal is inserted into a through hole formed in the terminal holding plate of the connector, and is formed so as to face each other at least on the side including the range inserted through the through hole. A cross-section of the terminal when it is assumed that the groove is not formed, and the shape is similar to that of the cross-section of the through-hole, and the through-hole is provided. It is larger than the cross section of the hole.

  In another terminal of the present invention, the cross-sectional shape of the pair of grooves is the same, and the cross-sectional shape of the terminal is axisymmetric.

  In still another terminal of the present invention, the area of the cross-section of the pair of grooves is such that the cross-section of the terminal when the groove is not formed, and the outside of the cross-section of the through hole in the terminal holding plate. It is more than the area of the part which overlaps with this part.

  In still another terminal of the present invention, the terminal holding plate is made of a composite material in which a reinforcing material is mixed with a resin, and the terminal is made of a copper-based alloy.

  In still another terminal of the present invention, a groove missing portion where the groove does not exist is further provided at least at one end in the longitudinal direction.

  In still another terminal of the present invention, when the groove is not formed, the terminal has a square or circular cross section, and the groove has a rectangular, triangular or arcuate cross section. It is.

  In the connector of the present invention, the connector has a terminal holding plate in which a through hole is formed and a terminal inserted through the through hole, and the terminal includes at least a range inserted through the through hole. Provided with a pair of grooves extending in the longitudinal direction so as to face each other, and assuming that the grooves are not formed, the cross section of the terminal is similar to the cross section of the through hole. And is larger than the cross section of the through hole.

  According to the present invention, the terminal inserted through the through hole formed in the terminal holding plate is formed on the side surface so that the pair of grooves extending in the longitudinal direction face each other. As a result, the terminal holding plate can be prevented from being cracked, deformed, etc., easy to manufacture, simple in configuration, and low in cost.

It is a perspective view of the connector in a 1st embodiment of the present invention. It is a partially broken view which shows the principal part of the connector in the 1st Embodiment of this invention. It is a top view of the connector in the 1st Embodiment of this invention, Comprising: (a) is a general view, (b) is a principal part enlarged view. It is a perspective view of the terminal in the 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the magnitude relationship between the cross section of the terminal in the 1st Embodiment of this invention, and the cross section of the through-hole for terminals, (a) is a figure which shows the case where the groove | channel of a terminal is a normal magnitude | size. (B) is a figure which shows the case where the groove | channel of a terminal is the minimum magnitude | size. It is a schematic diagram which shows the manufacturing method of the terminal in the 1st Embodiment of this invention. It is a perspective view which shows the edge part vicinity of the terminal in the 2nd Embodiment of this invention. It is a figure which shows the cross-sectional shape of the terminal in the 3rd-7th embodiment of this invention, Comprising: (a) is a figure which shows 3rd Embodiment, (b) shows 4th Embodiment. (C) is a figure which shows 5th Embodiment, (d) is a figure which shows 6th Embodiment, (e) is a figure which shows 7th Embodiment. It is a principal part perspective view of the conventional connector.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a connector according to the first embodiment of the present invention, FIG. 2 is a partially cutaway view showing a main part of the connector according to the first embodiment of the present invention, and FIG. FIG. 4 is a perspective view of a terminal according to the first embodiment of the present invention. In FIG. 3, (a) is an overall view, and (b) is an enlarged view of a main part.

  In FIG. 1, reference numeral 10 denotes a connector according to the present embodiment, which is mounted on a circuit board (not shown), fitted with a mating connector (not shown), and electrically connected to the cable or circuit board connected to the mating connector. Connect to.

  In the present embodiment, expressions indicating directions such as upper, lower, left, right, front, rear, etc. used for explaining the configuration and operation of the connector 10 and other members are absolute. Relative and suitable when the connector 10 and other members are in the posture shown in the figure, but when the posture of the connector 10 and other members is changed, change according to the change in posture. Should be interpreted.

  The connector 10 is made of an insulating material such as a synthetic resin, preferably polyamide (PA) resin, polybutylene terephthalate (PBT), liquid crystal polymer (LCP), polyphenylene sulfide (PPS), polyether ether ketone (PEEK). A housing 11 as a connector body integrally formed of a composite material in which a reinforcing material such as glass fiber, carbon fiber, or mica is mixed with a resin such as engineering plastics, and the like, and the housing And a plurality of metal terminals 61 inserted into and attached to the terminal through holes 17 as through holes formed in the bottom plate 16 as the 11 terminal holding plates. In the example shown in the figure, a total of nine terminals 61 are arranged in one row with a pitch of about 2.0 [mm], but the number of terminals 61, the pitch, and the number of rows are arbitrarily changed. For example, they may be arranged in two or more rows. Note that the terminals 61 do not necessarily have to be fitted into all the terminal through holes 17, and the terminals 61 can be omitted as appropriate in accordance with the arrangement of the terminals of the mating connector. FIG. 3 shows a state in which the terminal 61 is fitted only into the terminal through-hole 17 at the right end for convenience of explanation.

  The housing 11 has a substantially rectangular parallelepiped box shape, a pair of first side walls 12a extending in the arrangement direction of the terminals 61, and a pair of second side walls extending in a direction orthogonal to the first side wall 12a. 12b. In addition, when demonstrating the said 1st side wall 12a and the 2nd side wall 12b integrally, it demonstrates as the side wall 12. FIG. Further, the side to be mated with the mating connector, that is, the end surface on the mating side is opened, and functions as the mating opening 13 for mating with the mating connector.

  The connector 10 is a so-called straight-type connector, and is erected with respect to a circuit board (not shown), that is, in a state where the fitting opening 13 is opened upward, the terminal 61 is connected to the circuit board. It is mounted by soldering the lower end.

  In the present embodiment, the terminal 61 is rolled onto a wire 60 described later made of a conductive metal, preferably a non-ferrous metal, more preferably a copper alloy such as brass, bronze, white copper, corson copper, beryllium copper, or the like. It is a rod-shaped member formed into a cross-sectional shape as shown in FIG. 4 by performing a rolling process such as a forming process. The terminal 61 can also be manufactured by an extrusion process in which a molten metal is extruded from an opening of a predetermined shape of a die, or a drawing process of extracting the molten metal from an opening of a predetermined shape of a die. FIG. 4 shows only a part of the long terminal 61 for the sake of illustration.

  In the example shown in the figure, the terminal 61 includes a pair of grooves 65 extending in the longitudinal direction formed so as to face each other on at least a side surface 62 including a range inserted through the terminal through-hole 17. The cross-sectional shape of the wire 60 was substantially square, but the groove 65 was formed on each of the pair of first side surfaces 62a facing each other, and the groove 65 was not formed on the other pair of second side surfaces 62b. Accordingly, the cross section of the terminal 61 has a substantially H-shape including the grooves 65 formed on the upper and lower first side surfaces 62a and the side wall portions 64 extending in the vertical direction on the left and right sides of each groove 65, respectively. ing. If the groove 65 is not formed, the first side surface 62a and the second side surface 62b have the same length in the cross section of the terminal 61. When the first side surface 62a and the second side surface 62b are described in an integrated manner, the first side surface 62a and the second side surface 62b are described as the side surface 62.

  Moreover, although the cross-sectional shape of the groove 65 is substantially rectangular, an inevitable curved surface portion may be included in a corner portion connecting both ends of the bottom wall and the side walls on both sides. That is, in the cross section of the groove 65, the corner portion connecting the both ends of the bottom wall and the side walls on both sides may not be a corner portion with a sharp apex, but may be a corner portion with a round apex.

  In the example shown in FIGS. 1 and 2, a tapered portion 63 is formed on the side surface 62 following the upper end and the lower end of the terminal 61 and the vicinity of the upper end and the vicinity of the lower end is sharpened. It can be omitted as appropriate.

  On the other hand, as shown in FIG. 3, the terminal through hole 17 has a substantially square cross-sectional shape. That is, the cross-section of the terminal through hole 17 is similar to the cross-sectional shape of the terminal 61 assuming that the groove 65 is not formed. In addition, a taper portion 18 is formed at the upper surface side end portion and / or the lower surface side end portion of the bottom plate 16 in the terminal through-hole 17 in order to facilitate the insertion of the terminal 61. It can be omitted as appropriate.

  In the cross section of the terminal through hole 17, the length of each side is slightly shorter than the length of the side surface 62 in the cross section of the terminal 61. In other words, the cross-section of the terminal through-hole 17 is slightly smaller in area than the cross-section of the terminal 61 that is assumed that the groove 65 is not formed. Therefore, when the terminal 61 is press-fitted into the terminal through-hole 17, that is, the terminal 61 is moved relative to the housing 11 from above or below the bottom plate 16 and fitted into the terminal through-hole 17, and the bottom plate When attached to the terminal 16, the terminal through-hole 17 is expanded, and as a reaction, the side surface 62 of the terminal 61 is tightened by the terminal through-hole 17. As a result, the terminal 61 is firmly held by the bottom plate 16 and is prevented from being detached from the terminal through hole 17. 1 and 2, when the mounting is completed, the intermediate portion of the terminal 61 passes through the terminal through-hole 17, the upper end of the terminal 61 protrudes into the housing 11, and the lower end of the terminal 61 is the housing 11 Protrudes downward.

  Next, the magnitude relationship between the cross section of the terminal 61 and the cross section of the terminal through hole 17 will be described in detail.

  FIG. 5 is a schematic diagram showing the magnitude relationship between the cross section of the terminal and the cross section of the terminal through hole in the first embodiment of the present invention. In the figure, (a) is a diagram showing a case where the terminal groove is a normal size, and (b) is a diagram showing a case where the terminal groove is a minimum size.

  As shown in FIG. 5A, the cross section of the terminal 61 in the present embodiment has a vertically symmetric shape, that is, a line-symmetric shape with respect to a symmetry axis C that is a center line extending in the lateral direction. In other words, the terminal 61 is a member obtained by forming grooves 65 having the same cross-sectional shape extending in the longitudinal direction on a pair of opposite side surfaces of the wire 60 that is a base material of the terminal 61. In a cross-sectional view, it has a line-symmetric shape with respect to the symmetry axis C passing through the center between the pair of side surfaces.

  As described above, the cross-section of the terminal through-hole 17 is similar to the cross-sectional shape of the terminal 61 assuming that the groove 65 is not formed, and the groove 65 is not formed. The area is slightly smaller than the cross section of the terminal 61, specifically, as shown in FIG. FIG. 5A shows a state in which the cross section of the terminal through-hole 17 and the cross section of the terminal 61 are overlapped on the same plane so that the centers of both coincide with each other. Accordingly, it can be seen that the side surface 62 of the terminal 61 is positioned slightly outside the side surface of the terminal through hole 17.

  In the drawing, reference numeral 17 a denotes an insulating material constituting the bottom plate 16 positioned outside the terminal through-hole 17, that is, an overlap portion between the bottom plate 16 and the terminal 61. It can also be said that the overlap portion 17a indicates the amount of meat of the bottom plate 16 positioned outside the terminal through-hole 17 pushed away by the terminal 61 press-fitted into the terminal through-hole 17. If the amount of meat of the bottom plate 16 pushed out in this way is large, as explained in the section “Problems to be solved by the invention”, the bottom plate 16 is cracked or the bottom plate 16 is greatly deformed. Sometimes.

  However, in the present embodiment, the grooves 65 are formed in the pair of opposing side surfaces 62 of the terminal 61, that is, the first side surface 62 a, and the grooves 65 are located on the inner side of the side surface of the terminal through-hole 17. An anchor recess 65a, which is an existing portion, is included. As a result, the pushed-out meat of the bottom plate 16 enters the anchor recess 65a of the groove 65 and bulges to form a bulged portion, so that the bottom plate 16 is cracked or the bottom plate 16 is greatly deformed. There is no end to it. When the material of the terminal 61 is a relatively soft copper-based alloy and the material of the bottom plate 16 is a relatively hard composite material, a total of four side wall portions that are positioned on the left and right of the groove 65 and extend up and down. Each of 64 is pressed by the side surface of the terminal through-hole 17 to bend (bend) so as to be inclined toward the center in the width direction of the groove 65, so that the force of pushing the meat of the bottom plate 16 is relaxed, The bottom plate 16 is not cracked, and the bottom plate 16 is not greatly deformed. Further, since the bulging portion is engaged with the groove 65, the terminal 61 is more firmly held by the bottom plate 16.

  By the way, since the deformation of the bottom plate 16 being pushed away or entering the anchor recess 65a of the groove 65 and bulging is plastic deformation of the bottom plate 16, the deformation amount has an upper limit. Therefore, assuming that there is only one groove 65, the portion of the bottom plate 16 where the meat is displaced in the portion located on the opposite side of the groove 65 in a cross-sectional view enters the anchor recess 65a of the groove 65. This means that the amount of deformation of the bottom plate 16 on the entire side surface of the terminal through-hole 17 exceeds the upper limit and is virtually impossible, and the bottom plate 16 may be unexpectedly cracked or deformed. Further, since there are only two side wall portions 64 positioned on the left and right sides of the groove 65, even if the side wall portion 64 is bent, the force for pushing the meat of the bottom plate 16 is not alleviated so much. May occur.

  Further, if the number of the grooves 65 is three or more, it can be seen that the length of the side surface 62 of the terminal 61 located outside the side surface of the terminal through-hole 17 in a sectional view is shortened. That is, the terminal through hole 17 is expanded, and as a reaction thereof, the length of the side surface 62 of the terminal 61 tightened by the terminal through hole 17 is shortened. Furthermore, since many side wall parts 64 bend, the force which pushes the meat of the baseplate 16 will be eased too much. For this reason, the holding force of the terminal 61 by the bottom plate 16 becomes weak. However, the outer shape of the terminal 61 is made larger so that the side surface 62 is positioned more outward than the side surface of the terminal through-hole 17, so that the entire area of the overlap portion 17a is maintained, and the overlap portion 17a is pushed. It is also conceivable to maintain the holding force of the terminal 61 by the bottom plate 16, which is a reaction caused by being rejected. However, in this case, the area of the overlap portion 17a per unit length of the side surface 62 of the terminal 61, that is, the amount of local deformation of the meat of the bottom plate 16, increases. The amount of local deformation of the bottom plate 16 exceeds the upper limit and is virtually impossible, and the bottom plate 16 may be unexpectedly cracked or deformed.

  Further, even if the groove 65 is formed in each of the pair of first side surfaces 62a opposed to the terminal 61, if the width of the groove 65 is too narrow, the meat of the bottom plate 16 is pushed away at the center portion in the width direction of the second side surface 62b. It is practically impossible for the obtained portion to enter the anchor recess 65a of the groove 65, and the bottom plate 16 may be unexpectedly cracked or deformed. Further, since the side wall portion 64 is thick and difficult to bend, the force for pushing away the meat of the bottom plate 16 is not relieved, and the bottom plate 16 may be unexpectedly cracked or deformed. On the contrary, if the width of the groove 65 is too wide, the length of the side surface 62 of the terminal 61 located outside the side surface of the terminal through-hole 17 in a sectional view is shortened. Moreover, the side wall part 64 becomes narrow and becomes excessively bent. Therefore, the width of the groove 65 is preferably 20 to 80% of the width of the first side surface 62a, more preferably 30 to 70%, and 40 to 60%. Most desirable.

  The inventor of the present invention actually manufactured the housing 11 and the terminal 61 as shown in FIGS. 1 to 4 and press-fit the terminal 61 into the terminal through hole 17 of the bottom plate 16, and then observed the state of the bottom plate 16. . As a result, it was confirmed that the bottom plate 16 was not cracked or the bottom plate 16 was not greatly deformed. Further, it was confirmed that a part of the meat of the bottom plate 16 entered the anchor recess 65a of the groove 65 and bulged to form a bulged portion.

  In addition, the shape and dimension of the cross section of the terminal through-hole 17 and the terminal 61 of the bottom plate 16 of the housing 11 actually manufactured are as shown in FIG.

That is, the terminal through-hole 17 has a square cross section with a side of 0.49 [mm] and a cross-sectional area of 0.2401 [mm ² ]. The terminal 61 has a square cross section with a side of 0.50 [mm] when it is assumed that the groove 65 is not formed. Each of the grooves 65 is centered in the width direction of the first side surface 62a. It is a rectangular cross section that coincides with the center of the direction, has a width of 0.20 [mm], and a depth of 0.125 [mm]. And the area of the whole overlap part 17a is 0.0079 [mm < ² >].

  By the way, since the area of the anchor recess 65a of the groove 65 in the cross-sectional view only needs to be able to accommodate the meat of the bottom plate 16 that has been pushed away, it is considered that it may be equal to or greater than the entire area of the overlap portion 17a. Therefore, the inventor of the present invention further manufactures the terminal 61 in which the area of the groove 65 is equal to the entire area of the overlap portion 17a, press-fits the terminal 61 into the terminal through hole 17 of the bottom plate 16, and The condition was observed. As a result, it was confirmed that the bottom plate 16 was not cracked or the bottom plate 16 was not greatly deformed. Further, it was confirmed that a part of the meat of the bottom plate 16 entered the anchor recess 65a of the groove 65 and bulged to form a bulged portion.

  In this case, the cross-sectional shapes and dimensions of the terminal through-hole 17 and the terminal 61 of the bottom plate 16 of the manufactured housing 11 are as shown in FIG.

That is, the terminal through-hole 17 is the same as the example shown in FIG. The terminal 61 has a square cross section with a side of 0.50 [mm] when it is assumed that the groove 65 is not formed. Each of the grooves 65 is centered in the width direction of the first side surface 62a. It is a rectangular cross section that coincides with the center of the direction, has a width of 0.20 [mm], and a depth of 0.040 [mm]. And the area of the whole overlap part 17a is 0.0079 [mm < ² >].

  In the example shown in FIG. 5B, in the portion other than the anchor recess 65a in the groove 65, the corresponding range of the groove 65 on the first side surface 62a of the terminal 61 is assumed to be the bottom plate. It is the part which overlaps with 16 meat. 5B, the area of the groove 65 in the example shown in FIG. 5B is such that the terminal 61 that is assumed not to have the groove 65 and the meat of the bottom plate 16 positioned outside the terminal through-hole 17 overlap. It turns out that it is equal to the area of the part to do. Therefore, the area of the groove 65 in a cross-sectional view is that the portion of the bottom plate 16 located outside the cross section of the terminal through hole 17 and the terminal through hole 17 in the bottom plate 16, that is, the terminal through hole. It can be said that the area of the overlapping portion with the meat of the bottom plate 16 located outside the 17 cross section may be sufficient.

  However, if the amount of the meat of the bottom plate 16 pushed away by the terminal 61 press-fitted into the terminal through-hole 17 is not so large, all the meat of the pushed-down bottom plate 16 is inside the anchor recess 65a of the groove 65. Even if it is not accommodated, it is considered that the bottom plate 16 is not cracked or the bottom plate 16 is not greatly deformed. Therefore, the area of the groove 65 in a cross-sectional view is that of the portion where the cross section of the terminal 61 assumed that the groove 65 is not formed and the portion of the bottom plate 16 located outside the cross section of the terminal through hole 17 overlap. Although the area is preferably equal to or larger than the area, the area of the portion where the cross section of the terminal 61 assuming that the groove 65 is not formed and the portion of the bottom plate 16 located outside the cross section of the terminal through hole 17 overlaps. If not so large, the area of the groove 65 in a cross-sectional view is that the cross section of the terminal 61 assuming that the groove 65 is not formed and the portion located outside the cross section of the terminal through hole 17 in the bottom plate 16. It may be less than the area of the overlapping part.

  Next, a method for manufacturing the terminal 61 will be described in detail. Here, a case where the manufacturing method is roll forming will be described.

  FIG. 6 is a schematic diagram showing a method of manufacturing a terminal in the first embodiment of the present invention.

  As described above, the terminal 61 is a rod-like member having a substantially H-shaped modified cross-sectional shape formed by subjecting the wire 60 to roll forming. And in this Embodiment, the terminal 61 provided with a substantially H-shaped unusual cross-sectional shape is plastic-processed by roll forming as shown in the figure, and is manufactured.

  First, a material 60a as a solid wire 60 having a substantially square cross-sectional shape is prepared. Then, the material 60a is put into a roll forming machine (not shown). The roll forming machine includes a plurality of forming stands disposed along a pass line through which the material 60a is conveyed, and each forming stand includes a plurality of rotatable forming rolls.

  The material 60a thrown into the roll forming machine is conveyed along the pass line, and first passes through a fin pass forming stand including four fin pass rolls 81a, 81b, 81c and 81d as shown in the figure. Each of the upper fin pass roll 81a and the lower fin pass roll 81c is a forming roll having a belt-like forming surface with a flat (simple) peripheral surface, and facing each other, and They are arranged above and below the pass line so that the rotation axes are parallel to each other. Further, the right fin pass roll 81b and the left fin pass roll 81d are both forming rolls having a belt-like forming surface with a flat peripheral surface, and are opposed to each other and have their respective rotational axes. Are arranged on the left and right sides of the pass line so as to be parallel to each other. By passing between the four fin pass rolls 81a, 81b, 81c and 81d, the material 60a becomes a processed material 60b having a square cross-sectional shape.

  Subsequently, the processed material 60b is transported along a pass line and passes through a finishing processing stand having four finishing processing rolls 82a, 82b, 82c and 82d as shown in the figure. The upper finishing roll 82a and the lower finishing roll 82c are arranged above and below the pass line so as to face each other and so that their rotation axes are parallel to each other. Further, the right finishing roll 82b and the left finishing roll 82d are respectively arranged on the left and right sides of the pass line so as to face each other and to have parallel rotation axes. By passing between the finishing rolls 82a, 82b, 82c and 82d, the processed material 60b becomes the final processed material 60c having the same cross-sectional shape as the terminal 61 shown in FIG.

  Here, the right finishing roll 82b and the left finishing roll 82d are, as with the right fin pass roll 81b and the left fin pass roll 81d, a forming roll having a belt-like forming surface with a flat peripheral surface. It is. Thereby, a pair of flat second side surfaces 62b are formed.

  Each of the upper finishing roll 82a and the lower finishing roll 82c includes a single flange-like continuous protrusion 82f and a protrusion 82g formed at the center of a flat belt-shaped molding surface. . The cross-sectional shape of the protrusion 82f and the cross-sectional shape of the protrusion 82g are the same. Thereby, the groove 65 is formed in each of the pair of flat first side surfaces 62a.

  The upper finishing roll 82a and the lower finishing roll 82c can each be adjusted in the vertical position, that is, the distance between the top of the opposing projection 82f and the top of the projection 82g. It is desirable that it can be adjusted. Thereby, the depth of the groove 65 can be adjusted.

  Subsequently, the straight and long final processed material 60c is further conveyed, passes through a cutting machine (not shown), and is cut into a predetermined length by the cutting machine. Thereby, the terminal 61 can be obtained. If necessary, the taper portion 63 as shown in FIG. 2 can be formed by performing cutting, polishing, or the like in the vicinity of both ends of the terminal 61.

  In the present embodiment, only the example in which the second side surface 62b in which the groove 65 is not formed is flat over the entire length of the terminal 61 has been described. A convex part can also be formed in a part. For example, a thin fin-shaped protrusion extending in the longitudinal direction of the terminal 61 may be formed at a portion of the second side surface 62b facing the side surface of the terminal through-hole 17. Thus, when the terminal 61 is press-fitted into the terminal through-hole 17, the protrusion bites into the side surface of the terminal through-hole 17, so that the effect of firmly attaching the terminal 61 to the terminal through-hole 17, that is, the anchor effect Is demonstrated.

  Further, in the present embodiment, the connector 10 is a straight type as shown in FIGS. 1 and 2, and the circuit board is in a state where the fitting opening 13 for fitting with the mating connector opens upward. Although only an example in which the lower end of the terminal 61 is soldered to the connector 10 has been described, the connector 10 is inserted into the bottom plate 16 in which the terminal through hole 17 is formed and the terminal through hole 17. As long as it has the terminal 61 made, it may be of any kind and may be used for any purpose.

  Thus, in the present embodiment, the terminal 61 is inserted through the terminal through hole 17 formed in the bottom plate 16 of the connector 10. Then, it is assumed that the side surface 62 including at least the range inserted through the terminal through-hole 17 includes a pair of grooves 65 extending in the longitudinal direction so as to face each other, and the groove 65 is not formed. The cross section of the terminal 61 in this case is similar in shape to the cross section of the terminal through hole 17 and larger than the cross section of the terminal through hole 17.

  In the present embodiment, the connector 10 includes a bottom plate 16 in which the terminal through-hole 17 is formed and a terminal 61 inserted through the terminal through-hole 17. The terminal 61 includes a pair of grooves 65 extending in the longitudinal direction formed so as to face each other on the side surface 62 including at least a range inserted through the terminal through hole 17, and the groove 65 is formed. In the case where it is assumed that the cross section of the terminal 61 is not, the cross section of the terminal 61 is similar to the cross section of the terminal through hole 17 and is larger than the cross section of the terminal through hole 17.

  Thereby, it can prevent effectively that a crack arises in bottom plate 16 or bottom plate 16 changes greatly. Further, since the cross-sectional area of the terminal 61 is reduced by the cross-sectional area of the groove 65 as compared with the cross-sectional area of the terminal 61 when it is assumed that the groove 65 is not formed, the terminal 61 per unit length is manufactured. The material used to do so can be reduced. Furthermore, the manufacture of the terminal 61 and the connector 10 is easy, the configuration is simple, and the cost of the terminal 61 and the connector 10 can be reduced.

  The cross-sectional shape of the pair of grooves 65 is the same, and the cross-sectional shape of the terminal 61 is line symmetric. Therefore, when the terminal 61 is inserted into the terminal through hole 17, the force received by the terminal 61 as a reaction from the meat of the bottom plate 16 positioned outside the terminal through hole 17 pushed away by the terminal 61 is generated. The terminal 61 is not curved or tilted. Further, the meat of the bottom plate 16 positioned outside the terminal through-hole 17 pushed away by the terminal 61 can enter the groove 65, so that the bottom plate 16 is not unexpectedly cracked or deformed.

  Furthermore, the area of the cross section of the pair of grooves 65 is a portion where the cross section of the terminal 61 and the outer portion of the cross section of the terminal through hole 17 in the bottom plate 16 overlap when it is assumed that the groove 65 is not formed. It is more than the area. Therefore, the meat of the bottom plate 16 positioned outside the terminal through hole 17 pushed away by the terminal 61 can surely enter the groove 65.

  Further, the bottom plate 16 is made of a composite material in which a reinforcing material is mixed with resin, and the terminal 61 is made of a copper-based alloy. As a result, the portion of the terminal 61 that is located on the left and right of the groove 65 and extends vertically is pushed by the side surface of the terminal through-hole 17, so that it bends toward the center in the width direction of the groove 65. The force for pushing away the meat of the bottom plate 16 is alleviated, so that the bottom plate 16 is not cracked or the bottom plate 16 is not greatly deformed.

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol. The description of the same operation and the same effect as those of the first embodiment is also omitted.

  FIG. 7 is a perspective view showing the vicinity of the end portion of the terminal in the second embodiment of the present invention.

  As shown in the figure, the terminal 61 in the present embodiment includes a groove missing portion 66 in which the groove 65 does not exist at least at one end in the longitudinal direction. The groove missing portion 66 extends from the end face 67 at one end or both ends of the terminal 61 over a predetermined length range. The length of the range is shorter than the total length of the terminal 61. As shown in FIGS. 1 and 2, the bottom plate extends from the upper end and the lower end of the terminal 61 whose intermediate portion is held by the bottom plate 16. 16 is set shorter than the distance to the upper and lower surfaces. Further, a tapered portion 63 as shown in FIG. 2 can be formed in the groove missing portion 66.

  The groove missing portion 66 can be formed by, for example, intermittently raising and lowering the upper finishing roll 82a and the lower finishing roll 82c in a finish forming stand for roll forming. . Specifically, each time the processed material 60b is conveyed by a length corresponding to the entire length of the terminal 61, the upper finishing roll 82a is raised and the lower finishing roll 82c is lowered. At this time, the distance by which the upper finishing roll 82a is raised is such that the top of the protrusion 82f is separated from the upper surface of the processed material 60b, and the distance by which the lower finishing roll 82c is lowered is the protrusion 82g. Is the extent that the top portion is spaced from the lower surface of the processed material 60b. When the processed material 60b is conveyed by a distance corresponding to the groove missing portion 66 having a desired length, the upper finishing roll 82a is lowered and the lower finishing roll 82c is raised, Resume formation.

  Further, for example, the groove missing portion 66 is formed by forming intermittent missing portions in the protruding portions 82f and 82g continuous in the circumferential direction of the upper finishing roll 82a and the lower finishing roll 82c. It can also be formed. Specifically, in the circumferential direction of the upper finishing roll 82a and the lower finishing roll 82c, for each circumferential length corresponding to the entire length of the terminal 61, a portion where the protruding portion 82f and the protruding portion 82g do not exist, that is, A defective portion of the protrusion 82f and the protrusion 82g is formed. The length of the missing portion is a length corresponding to the groove missing portion 66.

  And the terminal 61 as shown by FIG. 7 can be obtained by cut | disconnecting the desired site | part of the groove missing part 66 with a cutting machine. In this case, the cut surface is the end surface 67.

  Since the configuration of other points is the same as that of the first embodiment, description thereof is omitted.

  Thus, in the present embodiment, the terminal 61 includes the groove missing portion 66 where the groove 65 does not exist at least at one end in the longitudinal direction. Thus, when the mating connector is fitted to the connector 10 and the protruding portion of the mating terminal is engaged with the groove 65, the connection state between the mating terminal and the terminal 61 is reliably maintained, and the mating connector and the connector 10 There is no fear that the mating state of this will be unnecessarily released.

  Since the effects of other points are the same as those of the first embodiment, description thereof is omitted.

  Next, third to seventh embodiments of the present invention will be described. In addition, about the thing which has the same structure as 1st and 2nd embodiment, the description is abbreviate | omitted by providing the same code | symbol. Also, the description of the same operations and effects as those of the first and second embodiments is omitted.

  FIG. 8 is a diagram showing the cross-sectional shape of the terminals in the third to seventh embodiments of the present invention. In the figure, (a) is a diagram showing a third embodiment, (b) is a diagram showing a fourth embodiment, (c) is a diagram showing a fifth embodiment, (d). Is a diagram showing a sixth embodiment, and (e) is a diagram showing a seventh embodiment.

  In the third embodiment, as shown in FIG. 8A, the terminal 61 includes a groove 65 having the same cross-sectional shape formed on a pair of side surfaces 62 facing each other, and the cross-sectional shape of the groove is , It is almost a triangle. If the groove 65 is not formed, the cross-sectional shape of the terminal 61 is substantially square, and the lengths of the first side surface 62a and the second side surface 62b are equal.

  Since the configuration of other points is the same as that of the first embodiment, description thereof is omitted. Also, the effect is the same as in the first embodiment, and the description thereof is omitted.

  In the fourth embodiment, as shown in FIG. 8B, the terminal 61 includes a groove 65 having the same cross-sectional shape formed on a pair of side surfaces 62 facing each other, and the cross-sectional shape of the groove is It is almost bow-shaped. If the groove 65 is not formed, the cross-sectional shape of the terminal 61 is substantially square, and the lengths of the first side surface 62a and the second side surface 62b are equal.

  Since the configuration of other points is the same as that of the first embodiment, description thereof is omitted. Also, the effect is the same as in the first embodiment, and the description thereof is omitted.

  In the fifth embodiment, as shown in FIG. 8C, the terminal 61 includes a groove 65 having the same cross-sectional shape formed on a pair of side surfaces 62 facing each other, and the cross-sectional shape of the groove is , It is almost a triangle. If the groove 65 is not formed, the cross-sectional shape of the terminal 61 is substantially circular. Similarly, since the cross-sectional shape of the terminal through-hole 17 is similar to the cross-sectional shape of the terminal 61 when it is assumed that the groove 65 is not formed, it is also substantially circular.

  Since the configuration of other points is the same as that of the first embodiment, description thereof is omitted. Also, the effect is the same as in the first embodiment, and the description thereof is omitted.

  In the sixth embodiment, as shown in FIG. 8D, the terminal 61 includes a groove 65 having the same cross-sectional shape formed on a pair of side surfaces 62 facing each other, and the cross-sectional shape of the groove is It is almost bow-shaped. If the groove 65 is not formed, the cross-sectional shape of the terminal 61 is substantially circular. Similarly, since the cross-sectional shape of the terminal through-hole 17 is similar to the cross-sectional shape of the terminal 61 when it is assumed that the groove 65 is not formed, it is also substantially circular.

  Since the configuration of other points is the same as that of the first embodiment, description thereof is omitted. Also, the effect is the same as in the first embodiment, and the description thereof is omitted.

  In the seventh embodiment, as shown in FIG. 8E, the terminal 61 includes a groove 65 having the same cross-sectional shape formed on a pair of side surfaces 62 facing each other, and the cross-sectional shape of the groove is The shape is substantially rectangular. If the groove 65 is not formed, the cross-sectional shape of the terminal 61 is substantially circular. Similarly, since the cross-sectional shape of the terminal through-hole 17 is similar to the cross-sectional shape of the terminal 61 when it is assumed that the groove 65 is not formed, it is also substantially circular.

  Since the configuration of other points is the same as that of the first embodiment, description thereof is omitted. Also, the effect is the same as in the first embodiment, and the description thereof is omitted.

  Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention.

  The present invention can be applied to terminals and connectors.

DESCRIPTION OF SYMBOLS 10 Connector 11 Housing 12a 1st side wall 12b 2nd side wall 13 Fitting opening 16,816 Bottom plate 17 Terminal through-hole 17a Overlapping part 18,63 Tapered part 60 Wire 60a Material 60b Processed material 60c Final processed material 61,861 Terminal 62 Side surface 62a First side surface 62b Second side surface 64 Side wall portion 65 Groove 65a Anchor recess 66 Groove missing portion 67 End surfaces 81a, 81b, 81c, 81d Fin pass rolls 82a, 82b, 82c, 82d Finishing rolls 82f, 82g Protrusion

Claims (7)

(A) a terminal inserted through a through hole formed in the terminal holding plate of the connector,
(B) A side surface including at least a range inserted through the through-hole includes a pair of grooves extending in the longitudinal direction so as to face each other,
(C) The cross section of the terminal assuming that the groove is not formed is similar in shape to the cross section of the through hole and larger than the cross section of the through hole. Terminal. The terminal according to claim 1, wherein the cross-sectional shape of the pair of grooves is the same, and the cross-sectional shape of the terminal is axisymmetric. The area of the cross section of the pair of grooves is equal to or greater than the area of the portion where the cross section of the terminal assuming that the groove is not formed and the outer portion of the cross section of the through hole in the terminal holding plate overlap. The terminal according to claim 1 or 2. The terminal according to claim 1, wherein the terminal holding plate is made of a composite material in which a reinforcing material is mixed with a resin, and the terminal is made of a copper-based alloy. The terminal according to any one of claims 1 to 4, further comprising a groove missing portion at which at least one end in the longitudinal direction does not have the groove. The cross section of the terminal when it is assumed that the groove is not formed is a square or a circle, and the cross section of the groove is a rectangle, a triangle, or an arc. Terminal described in. (A) a terminal holding plate in which a through hole is formed;
(B) a connector having a terminal inserted through the through-hole,
(C) The terminal includes a pair of grooves extending in the longitudinal direction formed so as to face each other on a side surface including a range inserted through the through hole.
(D) The cross section of the terminal when it is assumed that the groove is not formed is similar in shape to the cross section of the through hole and is larger than the cross section of the through hole. connector.

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