JP6117264B2 - Manufacturing method of connection terminal - Google Patents

Description

  The present invention relates to a method of manufacturing a connection terminal in which a connection portion between an electric wire connection portion and an electric wire is covered with a resin coating portion.

  Conventionally, various connection terminals have been proposed in which a connection portion between an electric wire connection portion and an electric wire is covered with a resin coating portion (see, for example, Patent Document 1 and Patent Document 2). One conventional example of such connection terminals is shown in FIGS.

  As shown in FIGS. 11 and 12, the connection terminal 100 includes a terminal connection portion 101 to which a mating terminal is connected, a wire connection portion 110 to which an electric wire (not shown) is connected, and the terminal connection portion 101 and the electric wire connection. The neck part 120 which connects between the parts 110 is provided. The terminal connection part 101, the wire connection part 110, and the neck part 120 are formed by bending one conductive metal plate.

  The terminal connection part 101 has a rectangular cylindrical shape. The mating terminal is inserted into this cylindrical shape. The electric wire connection part 110 has a U-shaped surrounding wall 111. A pair of first electric wire crimping portions 113 and a second electric wire crimping portion 114 project from upper end surfaces on both side ends of the surrounding wall 111. The core wire 150 of the electric wire W is crimped by caulking at the pair of first electric wire crimping portions 113, and the portion covered with the outer sheath 151 of the electric wire W is crimped by caulking at the second electric wire crimping portion 114.

  The neck 120 has a bottom wall 121 and a pair of side walls 122 that are erected from both ends of the bottom wall 121. The bottom wall 121 and the pair of side walls 122 are formed continuously from the walls of the terminal connection portion 101 and the wire connection portion 110. A pair of side wall 122 inclines so that a mutual space | interval may be narrowed gradually toward the electric wire connection part 110 from the terminal connection part 101. FIG. The width of the terminal connecting portion 101 is reduced to the width of the wire connecting portion 110 by the neck 120.

  The connection portion between the electric wire connecting portion 110 and the electric wire W is covered with a resin coating portion 130. The resin coating part 130 is produced by resin injection molding.

  That is, as shown in FIG. 13, the connection terminal 100 to which the electric wire W is connected is set in a mold 140 for resin molding. The mold 140 includes a lower mold 141 and an upper mold (not shown). FIG. 13 shows a state in which the connection terminal 100 is set in the lower mold 141. Next, resin is poured into the cavity 141a (not shown) in the lower mold 141 and the upper mold (not shown), and the poured resin is solidified to produce the resin coating portion 130.

  Here, at the time of resin molding, the resin damming piece 142 (shown by phantom lines in FIG. 12) of the mold 140 enters the neck 120. Both side surfaces of the resin damming piece 142 are formed as inclined surfaces corresponding to the pair of side walls 122. Resin damming piece 142 dams the molten resin so that the molten resin does not flow from the wire connecting part 110 side toward the terminal connecting part 102 side.

  According to the above conventional example, for example, when the connecting terminal 100 and the core wire w1 of the electric wire W are different metal materials (for example, the connecting terminal 1 made of copper and the electric wire W made of aluminum), water or the like is present at both connection points. When entering, a current flows due to the potential difference between the two and corrosion occurs, so that the resin coating portion 130 prevents such corrosion.

JP 2010-97704 A JP 2010-135121 A

  However, in the connection terminal 100 of the conventional example, since the pair of side walls 122 of the neck 120 are inclined, as shown in FIG. 14A, the neck 120 is shifted from the predetermined position to the terminal connection 101 side. When the resin damming piece 142 is set at the position, a gap d is formed between the resin damming piece 142 and each side wall 122, and the molten resin cannot be reliably dammed. As shown in FIG. 14B, when the resin damming piece 142 is set at a position shifted from the predetermined position of the neck 104 to the wire connecting portion 103 side, the resin damming piece 142 is moved to each side wall. It hits the upper end surface of 122, and the resin damming piece 142 cannot be set. At that time, the resin damming piece 122 and the side wall 104b may be damaged. Therefore, it is necessary to position and manage the resin damming piece 142 with high accuracy, and there is a problem that the positioning management of the resin damming portion 142 is troublesome.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method of manufacturing a connection terminal that facilitates positioning management of a resin damming piece.

  The present invention includes a terminal connection portion to which a mating terminal is connected, a wire connection portion to which an electric wire is connected, and a neck portion that connects between the terminal connection portion and the wire connection portion, and the wire connection portion and the The connection part of the electric wire is covered with a resin coating part, the neck part has a bottom wall and a pair of side walls erected from both sides of the bottom wall, and the pair of side walls have the same distance from each other In the method of manufacturing a connection terminal having a parallel wall portion, when molding the resin coating portion, the connection terminal to which the wire is connected is set in a mold for resin molding, and a pair of neck portions In the position of the parallel wall portion, a resin damming piece portion for blocking the resin flow into the terminal connection portion side is disposed, and the electric wire and the connection terminal are respectively held at appropriate positions by holding portions. It is a manufacturing method of a connection terminal characterized by holding

  When manufacturing the connection terminal, it is preferable to correct the pair of parallel wall portions of the neck at an appropriate position by the neck correction portion when connecting the electric wire to the electric wire connection portion. The neck correction part preferably has a pair of slits, and the pair of slits are preferably inserted into the pair of parallel wall parts of the neck. It is preferable that the resin damming piece part also serves as a holding part that holds the connection terminal in an appropriate position.

  According to the present invention, since the neck portion has a pair of parallel wall portions having the same interval, the resin damming piece portion is disposed within the range of the pair of parallel wall portions. The piece is set properly. Therefore, the positioning management of the resin damming piece is easy.

1 is a perspective view of a connection terminal according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, in which (a) is a perspective view of a connection terminal body before wire connection, and (b) is a plan view of the connection terminal body before wire connection. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a side view illustrating a state in which a connection terminal is set in a wire crimping apparatus, and FIG. It is a top view which shows one Embodiment of this invention and shows the state set to the connection terminal in the lower metal mold | die for resin molding. It is a side view which shows one Embodiment of this invention and shows the state which set the connection terminal to the metal mold | die for resin molding. FIG. 6 shows an embodiment of the present invention and is a cross-sectional view taken along the line BB of FIG. 5. FIG. 7 shows an embodiment of the present invention and is an enlarged view of part C in FIG. 6. FIG. 7 shows an embodiment of the present invention and is an enlarged view of a D part in FIG. 6. FIG. 9 is a cross-sectional view taken along the line EE of FIG. 8, showing an embodiment of the present invention. FIG. 10 shows an embodiment of the present invention and is a cross-sectional view taken along line FF in FIG. 9. It is a perspective view of a connection terminal which shows a conventional example. It is a top view of the connection terminal main body which shows a prior art example and is not connected to an electric wire. It is a top view which shows the prior art example and shows the state set to the connection terminal in the lower metal mold | die for resin molding. A conventional example is shown, (a) is a plan view showing the case where the resin damming piece is displaced to the terminal connection part side, (b) is the case where the resin damming piece is displaced to the wire connection part side FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 to 10 show an embodiment of the present invention. As shown in FIGS. 1 and 2, the connection terminal 1 includes a terminal connection portion 2 to which a mating terminal (not shown) is connected, a wire connection portion 10 to which an electric wire W is connected, a terminal connection portion 2 and an electric wire. And a neck portion 20 that connects between the connection portions 10. The terminal connection portion 2, the wire connection portion 10, and the neck portion 20 are formed by bending a copper alloy plate that is a single conductive metal plate.

  The terminal connection portion 2 includes a rectangular tube portion 3 and an elastic contact piece portion 4 (shown in FIG. 3A) disposed in the tube portion 3. When the mating terminal is inserted into the cylindrical portion 3, the mating terminal is brought into close contact with the bending return force of the elastic contact piece 4 and is electrically connected.

  The electric wire connection part 10 has a U-shaped surrounding wall 11. A pair of first electric wire crimping portions 13 and a pair of second electric wire crimping portions 14 project from upper end surfaces at both ends of the surrounding wall 11. The core wire 40 where the electric wire W is exposed is crimped by caulking by the pair of first electric wire caulking portions 13. A portion of the electric wire W covered with the insulating sheath 41 is crimped by caulking by the pair of second electric wire caulking portions 14. The core wire 40 of the electric wire W is an aluminum material.

  The neck portion 20 includes a bottom wall 21 and a pair of side walls 22 erected from both side ends of the bottom wall 21. The bottom wall 21 and the pair of side walls 22 are formed continuously from the walls of the terminal connection portion 2 and the wire connection portion 10.

  A pair of side wall 22 is comprised from the parallel wall part 22a whose mutual space | interval is the same, and the inclination wall part 22b from which a mutual space | interval changes. As shown in FIGS. 2B and 10, each parallel wall portion 22 a is set such that its length L is larger than the width W of the resin damming piece 63 of the resin molding die 60 described below. ing. The pair of inclined wall portions 22b are inclined in a direction of gradually narrowing the distance from the terminal connection portion 2 toward the wire connection portion 10. The width dimension of the terminal connection part 101 is reduced to the width dimension of the wire connection part 110 by the pair of inclined wall parts 22b.

  The connection portion between the electric wire connecting portion 10 and the electric wire W is covered with the resin coating portion 30. The resin coating portion 30 completely covers the outer periphery of the wire connection portion 10 and the terminal portion of the wire W. The resin coating portion 30 prevents corrosion caused by water or the like entering the connection portion between the wire connection portion 10 and the wire W. The resin coating portion 30 is produced by resin injection molding using a mold 60 as described below.

  Next, a manufacturing procedure of the connection terminal 1 will be described. First, the connection terminal 1 shown in FIGS. 2A and 2B is manufactured by press molding of a metal plate or the like. Next, the electric wire connection process which connects the connection terminal 1 and the terminal part of the electric wire W is performed. That is, in the electric wire connecting step, as shown in FIG. 3A, the connection terminal 1 and the terminal portion of the electric wire W in FIGS. 2A and 2B are set in the electric wire crimping device 50. The electric wire crimping device 50 includes a neck correction unit 51. As shown in FIG. 3B, the neck correction unit 51 has a pair of slits 52 extending in the vertical direction. The pair of parallel wall portions 22 a of the neck portion 20 are inserted into the pair of slits 52. And the electric wire W is crimped | bonded by the 1st crimping part 53 and the 2nd crimping part 54 of the electric wire crimping apparatus 50 crimping the 1st electric wire crimping part 13 and the 2nd electric wire crimping part 14 to a predetermined form. The The pair of parallel wall portions 22 of the neck portion 20 is not deformed by receiving a bending force at the time of caulking, and is kept vertical by the neck portion correcting portion 51.

  Next, a resin molding process using the mold 60 is performed. First, the configuration of the mold 60 will be described. The mold 60 includes a lower mold 61 and an upper mold 62. The upper mold 62 is provided with a resin damming piece 63 at a position corresponding to the pair of parallel wall portions 22 a of the neck 20. The resin damming piece 63 is set to have a size that enters the pair of parallel wall portions 22a without any gap. Unlike the conventional example, both side surfaces of the resin damming piece 63 are set parallel to each other in correspondence with the pair of parallel wall portions 22a. As shown in FIG. 10, the corner portion at the insertion tip of the resin damming piece portion 63 corresponds to the corner shape of the inner surface of the neck portion 20, and is set to a right-angle shape instead of a round shape. As a result, there is no gap at the corners.

  The resin damming piece 63 also serves as a terminal holding part that presses the bottom wall 21 of the neck 20 and holds the connection terminal 1 in an appropriate position. The mold 60 includes an electric wire holding portion 64 that holds the electric wire W from the vertical direction and holds the electric wire W at an appropriate position. That is, the mold 60 holds the electric wire W in an appropriate position by the electric wire holding part 64 as shown in FIG. 7, and the connecting terminal 1 is put in an appropriate position by the resin damming piece part 63 as shown in FIG. Hold. Resin molding is performed using the mold 60 having such a configuration.

  In the resin molding step, as shown in FIG. 4, the connection terminal 1 to which the electric wire W is connected is set in a resin molding die 60 (FIG. 4 shows a state where it is set in the lower die 61). Next, a resin is poured into the cavities 61a and 62a in the mold 60, and the poured resin is solidified to produce the resin coating portion 30.

  In resin molding, as shown in FIGS. 9 and 10, the resin damming piece 63 of the mold 60 enters the neck 20. Since the neck portion 20 has a pair of parallel wall portions 22a having the same distance from each other, if the resin damming piece portion 63 is disposed within the range of the pair of parallel wall portions 22a, the resin damming piece portion 63 is set properly. That is, unlike the conventional example, a gap is not generated between the resin damming piece 63 and the inner surfaces of the pair of side walls 22, and the resin damming piece 63 does not hit each side wall 22. The resin damming piece 63 is properly set without a gap in the pair of parallel wall portions 22a. Therefore, the positioning management of the resin damming piece 63 is easy.

  The length L of the parallel wall portion 22a is set to be larger than the width W of the resin damming piece 63 of the resin molding die 60. Therefore, the resin damming piece 63 can be easily and reliably set in the range of the pair of parallel wall portions 22a.

  As shown in FIG. 6, when the resin coating portion 30 is molded, the electric wire W and the connection terminal 1 are held at appropriate positions by the electric wire holding portion 64 and the resin damming piece portion 63 as the terminal holding portion. 1 bending deformation (bend-up) can be suppressed as much as possible. Since the resin damming piece 63 also serves as a terminal holding portion, the configuration can be simplified.

  When the electric wire W is connected to the electric wire connecting portion 10 by crimping, as shown in FIGS. 3A and 3B, the pair of parallel wall portions 22a of the neck portion 20 are corrected to the proper positions by the neck correcting portion 51. In the subsequent resin molding step, as shown in FIG. 9, the resin damming piece 63 can be reliably disposed in the pair of parallel wall portions 22 a without a gap.

DESCRIPTION OF SYMBOLS 1 Connection terminal 2 Terminal connection part 10 Wire connection part 20 Neck part 21 Bottom face part 22 Side part 22a Parallel wall part 51 Neck part correction part 60 Mold 63 Resin damming piece part (holding part)
64 Electric wire holding part (holding part)
W electric wire

Claims (4)

A terminal connection portion to which a mating terminal is connected; a wire connection portion to which an electric wire is connected; and a neck portion that connects between the terminal connection portion and the wire connection portion. Is covered with a resin coating, and the neck has a bottom wall and a pair of side walls erected from both sides of the bottom wall, and the pair of side walls are parallel walls having the same distance from each other A method of manufacturing a connection terminal having a portion,
At the time of molding the resin coating portion, the connection terminal to which the electric wire is connected is set in a mold for resin molding, and the resin to the terminal connection portion side is placed at the position of the pair of parallel wall portions of the neck portion. A method of manufacturing a connection terminal, wherein a resin damming piece portion for preventing the inflow of the mold is disposed, and the electric wire and the connection terminal are respectively held by holding portions at appropriate positions. It is a manufacturing method of the connecting terminal according to claim 1,
A method of manufacturing a connection terminal, comprising: correcting a pair of parallel wall portions of the neck portion at an appropriate position by a neck portion correcting portion when connecting the wire to the wire connecting portion. It is a manufacturing method of the connecting terminal according to claim 2,
The neck correction part has a pair of slits, and the pair of slits are inserted into the pair of parallel wall parts of the neck part. It is a manufacturing method of the connecting terminal in any one of Claims 1-3,
The resin damming piece portion also serves as a holding portion for holding the connection terminal in an appropriate position.

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