CN114824854A - Terminal and method for connecting terminal and cable - Google Patents

Terminal and method for connecting terminal and cable Download PDF

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Publication number
CN114824854A
CN114824854A CN202210101360.5A CN202210101360A CN114824854A CN 114824854 A CN114824854 A CN 114824854A CN 202210101360 A CN202210101360 A CN 202210101360A CN 114824854 A CN114824854 A CN 114824854A
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CN
China
Prior art keywords
core wire
terminal
cable
pressure
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210101360.5A
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Chinese (zh)
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CN114824854B (en
Inventor
和田真人
高桥谦介
山中和之
国眼幸治
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JST Mfg Co Ltd
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JST Mfg Co Ltd
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Publication date
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Publication of CN114824854A publication Critical patent/CN114824854A/en
Application granted granted Critical
Publication of CN114824854B publication Critical patent/CN114824854B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
    • H01R12/585—Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/56—Means for preventing chafing or fracture of flexible leads at outlet from coupling part
    • H01R13/562—Bending-relieving
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/058—Crimping mandrels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Abstract

The invention provides a terminal and a method for connecting the terminal and a cable, which can reduce the load of the core wire when the cable bends to restrain the damage of the core wire, restrain the increase of the number of components and man-hours for connecting the terminal and the cable, and restrain the influence of the heat added to the terminal on the resin component on the cable side when the cable is connected with a connection object through the terminal. A terminal (2) is provided with: a connecting part (15) connected to an object (100) to be connected; and a pressure-bonding section (16) that is integrally connected to the connection section (15) and is pressure-bonded to the core wire (4) of the cable (3). The pressure-bonding section (16) has a core wire surrounding section (20) that surrounds the outer periphery of the core wire (4) in the circumferential direction, and a curved surface section (22) that extends in an arc shape from the inside to the outside of the core wire surrounding section (20) is provided along the edge section of the core wire surrounding section (20) at a core wire leading end section (21) where the core wire (4) in a pressure-bonded state is led out and extends at the pressure-bonding section (20).

Description

Terminal and method for connecting terminal and cable
Technical Field
The present invention relates to a terminal connected to a core wire at a terminal portion of a cable and a method of connecting the terminal to the cable.
Background
Conventionally, a terminal connected to a core wire at a terminal portion of a cable is used. As such a terminal, for example, a terminal disclosed in patent document 1 is known. Patent document 1 discloses a connection structure between a terminal and a substrate, in which the terminal is connected to a cable, the terminal connected to the cable is connected to the substrate, and the cable is bent from the terminal side. Patent document 1 discloses the following: a flexible tube made of resin for reinforcement is attached to a bent portion from a terminal to a cable, thereby reducing a load on a core wire when the cable is bent and suppressing damage to the core wire.
Further, the terminal disclosed in patent document 1 is configured to be crimped to a core wire, and also to be crimped to a flexible tube made of resin, or to be crimped to a coating portion made of resin that covers the periphery of the core wire in a cable.
Documents of the prior art
Patent document 1: japanese laid-open patent publication No. 2009-021167
Disclosure of Invention
Problems to be solved by the invention
According to the terminal disclosed in patent document 1, the reinforcing tube is attached to the cable, so that the load on the core wire when the cable is bent can be reduced, and the damage to the core wire can be suppressed. However, when the terminal disclosed in patent document 1 is connected to a cable, a flexible tube made of resin for reinforcement needs to be attached to the cable. Therefore, the number of components in the connection structure between the terminal and the cable increases, and the number of steps for connecting the terminal and the cable increases. Therefore, it is desired to reduce the load on the core wire when the cable is bent, to suppress the occurrence of damage to the core wire, and to suppress the increase in the number of components and man-hours for connecting the terminal and the cable.
In addition, when the terminal disclosed in patent document 1 is connected to a cable, the terminal is crimped to a core wire, and is also crimped to a flexible tube made of resin, or a coating portion made of resin that covers the periphery of the core wire in the cable. Therefore, when the terminal is connected to a connection object such as a board to which the cable is connected through the terminal by a method involving heating at a high temperature such as soldering, a resin-made member on the cable side such as a resin-made covering portion or a resin-made tube is likely to be melted by heat conduction from the terminal. In particular, when the terminal is connected to the object to be connected by soldering, in a situation where connection by lead-free solder is prohibited using lead alloy solder, the temperature of soldering is increased, and it is desired that heat conduction to a resin member on the cable side such as a resin cover or a tube can be further suppressed. Therefore, it is desirable to reduce the load on the core wire when the cable is bent, to suppress the occurrence of damage to the core wire, and to suppress the influence of heat added to the terminal on the resin member on the cable side when the cable is connected to the connection object via the terminal.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a terminal and a method of connecting a terminal and a cable, which can reduce a load of a core wire when the cable is bent to suppress damage to the core wire, can suppress an increase in the number of components and man-hours for connecting the terminal and the cable, and can suppress an influence of heat applied to a resin-made component on a cable side when the cable is connected to a connection object via the terminal.
Means for solving the problems
(1) In order to solve the above problem, one aspect of the present invention is a terminal connected to a core wire of a terminal portion of a cable, the terminal including: a connection unit that is connected to an object to be connected to which the cable is connected via the terminal; and a pressure-bonding section integrally coupled to the connection section and pressure-bonded to the core wire, the pressure-bonding section having a core wire surrounding section provided so as to surround an outer periphery of the core wire along a circumferential direction, a curved surface section extending in an arc shape from an inner side to an outer side of the core wire surrounding section being provided at a core wire leading end section along an edge of the core wire surrounding section, the core wire leading end section being an end section on a side opposite to a side of the pressure-bonding section integrally coupled to the connection section, the end section being an end section on a side where the core wire in a state of pressure-bonded to the pressure-bonding section is led out and extends.
According to this configuration, the terminal is connected to the cable by crimping the core wire of the terminal portion of the cable to the crimping portion, and the cable and the object to be connected are connected via the terminal by connecting the connection portion of the terminal to which the cable is connected to the object to be connected. The core wire of the cable is pressed against the pressure-bonding section of the terminal in a state where the outer periphery is surrounded by the core wire surrounding section, and is drawn out from the pressure-bonding section in a state where the core wire extends along a curved portion which is provided along an edge of a core wire drawing end section drawn out from the pressure-bonding section and extends in an arc shape from the inside to the outside of the core wire surrounding section. Therefore, the load can be suppressed from being locally concentrated on the core wire of the cable at the edge portion of the pressure-bonding section, and the core wire can be supported in a state where the load is dispersed in the curved portion of the core wire leading end portion. This reduces the load on the core wire when the cable is bent, and thus prevents damage to the core wire.
Further, according to the above configuration, the load of the core wire when the cable is bent is reduced to suppress damage of the core wire, and the terminal portion of the cable can be connected to the terminal only by crimping the core wire to the crimping portion of the terminal. Therefore, it is not necessary to separately provide a reinforcing member as disclosed in patent document 1. That is, it is not necessary to separately provide a reinforcing member for reducing the load of the core wire at the time of bending the cable and suppressing damage to the core wire. Therefore, according to the above configuration, the load of the core wire at the time of bending the cable can be reduced to suppress damage of the core wire, and the number of components and the number of man-hours for connecting the terminal and the cable can be suppressed from increasing.
Further, according to the above configuration, the terminal portion of the cable is connected to the terminal only by crimping the core wire to the crimping portion of the terminal. That is, the terminal is crimped only to the core wire of the cable, and is not crimped to the resin-made covering portion of the cable. Further, according to the above configuration, since a resin member for reinforcement is not separately provided, the resin member for reinforcement is not pressure-bonded thereto. Therefore, even when the terminal connected to the cable is connected to the connection object by a method involving heating at a high temperature such as soldering, the heat from the terminal is not directly transmitted to the resin member on the cable side such as the covering portion of the cable. This can suppress the influence of heat applied to the terminal on the resin member on the cable side when the cable is connected to the connection object via the terminal.
Therefore, according to this configuration, it is possible to provide a terminal capable of reducing the load of the core wire when the cable is bent, suppressing damage to the core wire, suppressing an increase in the number of components and man-hours for connecting the terminal and the cable, and suppressing the influence of heat added to the terminal on a resin-made component on the cable side when the cable and the connection object are connected via the terminal.
In addition, when the connection object is a substrate, that is, when the cable is connected to the substrate via the terminal, the terminal to which the cable is connected may be connected in a substantially perpendicular posture to the substrate and mounted on the substrate. In this case, when the length of the terminal is increased, the height of the terminal vertically protruding from the substrate increases, and the mounting height of the terminal with respect to the substrate increases. When the mounting height of the terminal with respect to the substrate becomes high, the installation space of the substrate increases. However, according to the above configuration, the terminal is crimped only to the core wire of the cable, and is not crimped to the resin coating portion of the cable. Thus, the length of the pressure-bonding section of the terminal can be shortened as compared with a terminal that is pressure-bonded to both the core wire and the covering section of the cable. Therefore, according to the above configuration, the height of the terminal projecting perpendicularly from the substrate can be reduced, and the mounting height of the terminal to the substrate can be reduced.
(2) The curved surface portion may be provided as a surface of a folded-back portion formed by providing a plate-like portion constituting the core wire surrounding portion in a state where the plate-like portion is folded back and overlapped at the core wire lead-out end portion, and may be provided to extend in a semicircular shape from an inner side to an outer side of the core wire surrounding portion.
According to this configuration, by providing the portion in a state where the core wire lead-out end portion is folded back and overlapped, the curved surface portion extending in a semicircular shape from the inside to the outside of the core wire surrounding portion can be easily formed. Further, since the curved portion which is provided along the edge portion of the core wire leading end portion and extends in an arc shape from the inside to the outside of the core wire surrounding portion is provided in a semicircular shape, even when the bending angle of the cable is large, the load of the core wire at the time of bending the cable can be reduced and the damage of the core wire can be suppressed.
(3) The curved surface portion may be provided as a surface of a folded-back portion formed by folding back and overlapping the plate-like portion from an inner side toward an outer side of the core wire surrounding portion at the core wire lead-out end portion.
According to this structure, the plate-like portion is provided at the core wire leading end portion in a state of being folded back and overlapped from the inside toward the outside of the core wire surrounding portion. Therefore, the core wire drawn and extended from the inside to the outside of the core wire surrounding portion is arranged and extended so as to extend more smoothly along the curved surface portion. Therefore, the load is further suppressed from being locally concentrated on the core wire of the cable at the edge portion of the pressure-bonding section, and the core wire is supported in a state where the load is further dispersed in the curved portion of the core wire lead-out end portion. This can further reduce the load on the core wire when the cable is bent, and further suppress damage to the core wire.
(4) The connection object may be a substrate, and the connection part may be provided in a cylindrical shape covering the core wire from the outside and configured to be soldered to the substrate in a state of being inserted through a through hole provided in the substrate.
According to this configuration, in the terminal for connecting the substrate and the cable, the load of the core wire at the time of bending the cable can be reduced to suppress damage of the core wire, the number of components for connecting the terminal and the cable and the increase of man-hours can be suppressed, and the influence of heat added to the terminal when the cable is connected to the substrate via the terminal on the resin-made component on the cable side can be suppressed.
In the above configuration, the connection portion connected to the substrate is provided in a tubular shape covering the core wire, and the tubular connection portion is configured to be soldered in a state of being inserted through the through hole of the substrate. Therefore, by making the inner diameter of the through hole slightly larger than the outer diameter of the tubular connection portion, the gap between the connection portion and the through hole can be reduced in a state where the terminal is inserted through the through hole of the substrate. Alternatively, according to this configuration, when the tubular connection portion is configured to be elastically deformable and to be reduced in diameter when an external force is applied from the outer periphery to the radially inner side, the inner diameter of the through hole can be made equal to the outer diameter of the tubular connection portion or made slightly smaller than the outer diameter of the tubular connection portion. By setting the inner diameter of the through hole and the outer diameter of the tubular connecting portion in this manner, the gap between the connecting portion and the through hole can be made extremely small in a state where the terminal is inserted through the through hole of the substrate. Therefore, the terminal is less likely to be greatly inclined with respect to the substrate in a state before the terminal is inserted through the through-hole of the substrate and the core wire is soldered to the substrate. Thus, the core wire and the board can be soldered while the cable is held substantially perpendicular to the board.
In the above configuration, the inner diameter of the through hole is slightly larger than the outer diameter of the tubular connection portion, so that the gap between the connection portion and the through hole can be reduced in a state where the terminal is inserted into the through hole of the substrate. Alternatively, according to the above configuration, when the tubular connection portion is elastically deformable to be reduced in diameter, the inner diameter of the through hole is made equal to the outer diameter of the tubular connection portion, or the inner diameter of the through hole is made slightly smaller than the outer diameter of the tubular connection portion, whereby the clearance between the connection portion and the through hole can be made extremely small in a state where the terminal is inserted through the through hole of the substrate. Therefore, when the substrate and the core wire are soldered, the molten solder is easily absorbed into the gap by capillary action. This ensures the amount of solder that reaches between the substrate and the core wire.
(5) In order to solve the above problem, a method of connecting a terminal to a cable according to an aspect of the present invention connects a terminal according to an aspect of the present invention to a cable. In addition, a method for connecting a terminal and a cable according to an aspect of the present invention includes: a blanking step of blanking a blank of the terminal from a plate-shaped metal member; a folding back step of forming the core wire leading end provided with the curved surface portion by bending an edge portion of a pressure-bonding section blank portion as a blank portion of the pressure-bonding section so as to fold back; a core wire arranging step of arranging the core wire of the terminal portion of the cable to the pressure-bonding section in a state before the pressure-bonding section blank is partially bent and the core wire is pressure-bonded; and a crimping step of clamping and pressing the blank crimping part on which the core wire is arranged by a die for crimping part having an upper tooth die and a lower tooth die, thereby bringing the core wire into a state of being crimped at the crimping part.
According to this structure, after the blank of the terminal is punched out of the plate-like metal member, the pressure-bonding section blank portion is bent so as to be folded back, whereby the core wire lead-out end portion provided with the curved surface portion can be easily formed. Further, by arranging the core wire in the pressure-bonding section blank portion, and pressing the core wire while sandwiching the core wire between the upper tooth die and the lower tooth die, the terminal can be pressure-bonded to the core wire at the pressure-bonding section, and the terminal can be connected to the cable. In addition, in a state where the terminal and the cable are connected by the above-described connection method, the load of the core wire when the cable is bent can be reduced and the damage of the core wire can be suppressed by the curved surface portion of the edge portion of the pressure-bonding section. In addition, in a state where the terminal is connected to the cable by the above-described connection method, the terminal portion of the cable is connected to the terminal only by crimping the core wire to the crimping portion of the terminal. Therefore, it is not necessary to separately provide a reinforcing member for suppressing damage to the core wire, and the number of members and the number of man-hours for connecting the terminal and the cable can be suppressed from increasing. In the state where the terminal and the cable are connected by the above-described connection method, the terminal portion of the cable is connected to the terminal only by crimping the core wire to the crimping portion of the terminal, and therefore, neither crimping to the resin-made covering portion of the cable nor providing a separate reinforcing resin member is required. Therefore, even when the terminal connected to the cable is connected to the connection object by a method involving heating at a high temperature such as soldering, the heat from the terminal is not directly transmitted to the cable-side resin member such as the cable cover or the reinforcing member. This can suppress the influence of heat applied to the terminal on the resin member on the cable side when the cable is connected to the connection object via the terminal.
Therefore, according to this configuration, it is possible to provide a method of connecting a terminal and a cable, which can reduce the load of the core wire when the cable is bent, suppress damage to the core wire, suppress an increase in the number of components and man-hours for connecting the terminal and the cable, and suppress an influence of heat applied to the terminal when the cable is connected to a connection object via the terminal on a resin-made component on the cable side.
(6) The mold for crimping part may include: a first tooth mold portion that sandwiches and presses the core wire surrounding portion; and a second tooth mold portion that sandwiches and presses the core wire lead-out end portion.
According to this configuration, the die for pressure-bonding section is provided with the first and second tooth dies that sandwich and press the core wire surrounding section and the core wire lead-out end section, respectively. Therefore, it is possible to easily set a configuration of a die for a crimping portion accurately fitting a difference in shape of each of a core wire surrounding portion covering an outer periphery of a core wire in a surrounding manner and being crimped to the core wire and a core wire lead-out end portion provided with a curved portion by bending a crimping portion blank portion in a folded-back manner. Further, the core wire surrounding portion and the core wire leading end portion can be simultaneously pressed by 1 pressing operation of clamping and pressing the pressure-bonding section blank portion where the core wire is arranged by the pressure-bonding section mold having the first tooth mold portion and the second tooth mold portion, and the core wire can be brought into a state of being pressure-bonded by the pressure-bonding section. Therefore, in the method for connecting the terminal and the cable, which can reduce the load of the core wire when the cable is bent and suppress damage to the core wire, the pressure-bonding of the core wire and the terminal can be easily and efficiently performed.
(7) The first tooth mold part and the second tooth mold part may be provided separately from each other, and the first tooth mold part and the second tooth mold part may be used in a state of being overlapped in the pressure bonding step.
According to this configuration, the die for the pressure-bonding section is configured in a state in which the first split tooth mold section and the second split tooth mold section overlap each other. Therefore, the structure of the die for pressure-bonding section can be set more easily, which accurately conforms to the difference in the shape of each of the core surrounding portion and the core lead-out end portion. Further, since the first tooth mold part and the second tooth mold part can be formed and combined separately, the manufacturing of the die for the pressure-bonding section becomes easy, and the degree of freedom in designing the structure of the die for the pressure-bonding section can be improved.
Effects of the invention
According to the present invention, it is possible to provide a terminal, a method of connecting a terminal and a cable, which can reduce a load of a core wire when the cable is bent, suppress damage of the core wire, suppress an increase in the number of components and man-hours for connecting the terminal and the cable, and suppress an influence of heat applied to the terminal on a resin-made component on a cable side when the cable is connected to a connection object via the terminal.
Drawings
Fig. 1 (a) and (B) are perspective views showing a state in which the terminal according to the embodiment of the present invention is connected to the core wire of the cable.
Fig. 2 (a) is a plan view of the terminal shown in fig. 1 (a), and fig. 2 (B) is a side view of the terminal shown in fig. 1 (a).
Fig. 3 is a view showing a state before the terminal shown in fig. 1 (a) and 1 (B) is connected to the core wire of the terminal portion of the cable, fig. 3 (a) is a perspective view seen from an upper side, and fig. 3 (B) is a perspective view seen from a lower side.
Fig. 4 is a plan view showing a state before the terminals shown in fig. 1 (a) and 1 (B) are separated from the carrier.
Fig. 5 is a diagram showing a state in which a terminal connected to a core wire of a cable is inserted into a through hole of a substrate, fig. 5 (a) is a diagram showing a state before insertion, fig. 5 (B) is a diagram showing a state in the middle of insertion, and fig. 5 (C) is a diagram showing a state after insertion.
Fig. 6 is a view showing a state in which the terminal shown in fig. 5 (C) is soldered to the substrate.
Fig. 7 is a flowchart for explaining an example of a method of connecting a terminal and a cable according to the embodiment of the present invention.
Fig. 8 (a) and 8 (B) are diagrams for explaining a punching step and a folding-back step in the method for connecting a terminal and a cable shown in fig. 7, fig. 8 (a) is a diagram for explaining the punching step, and fig. 8 (B) is a diagram for explaining the folding-back step.
Fig. 9 is a diagram for explaining a bending step in the method of connecting the terminal and the cable shown in fig. 7, and is a diagram showing the terminal in a state of being coupled to the carrier, fig. 9 (a) is a plan view, fig. 9 (B) is a side view, and fig. 9 (C) is a front view.
Fig. 10 (a) and 10 (B) are diagrams for explaining a core wire arrangement step in the method for connecting a terminal and a cable shown in fig. 7, fig. 10 (a) is a diagram showing a state before arranging a core wire of a cable with respect to the terminal, and fig. 10 (B) is a diagram showing a state after arranging a core wire of a cable with respect to the terminal.
Fig. 11 is a diagram for explaining a connection portion forming step and a crimping step in the method for connecting a terminal and a cable shown in fig. 7, and is a perspective view showing a die unit used in the connection portion forming step and the crimping step.
Fig. 12 is a diagram for explaining a crimping step in the method of connecting a terminal and a cable shown in fig. 7, and is a diagram showing a state in which the terminal is crimped to a core wire by a die for a crimping portion.
Fig. 13 is a diagram showing a terminal according to a first modification, fig. 13 (a) is a perspective view showing a state before the terminal according to the first modification is connected to a core wire of a cable, and fig. 13 (B) is a perspective view showing a state in which the terminal according to the first modification is connected to the core wire of the cable and the core wire is omitted from illustration.
Fig. 14 is a diagram showing a terminal of a second modification example, fig. 14 (a) is a perspective view showing a state before the terminal of the second modification example is connected to a core wire of a cable, fig. 14 (B) is an enlarged view showing a part of a pressure-bonding section of the terminal shown in fig. 14 (a), and fig. 14 (C) is a perspective view showing the terminal of the second modification example connected to the core wire of the cable and with the core wire of the cable omitted from illustration.
Fig. 15 is a diagram showing a terminal of a third modification, fig. 15 (a) is a perspective view showing a state before the terminal of the third modification is connected to a core wire of a cable, and fig. 15 (B) is a perspective view showing a state in which the terminal of the third modification is connected to the core wire of the cable and the core wire of the cable is omitted from illustration.
Fig. 16 is a diagram showing a terminal of a fourth modification, fig. 16 (a) is a perspective view showing a state before the terminal of the fourth modification is connected to a core wire of a cable, and fig. 16 (B) is a perspective view showing a state in which the terminal of the fourth modification is connected to the core wire of the cable and the core wire of the cable is omitted from illustration.
Fig. 17 is a diagram showing a terminal of a fifth modification, fig. 17 (a) and 17 (B) are perspective views showing a state before the terminal of the fifth modification is connected to a core wire of a cable, and fig. 17 (C) is a perspective view showing a state in which the terminal of the fifth modification is connected to the core wire of the cable and the core wire of the cable is omitted from illustration.
Fig. 18 is a diagram showing a terminal of a sixth modification, in which fig. 18 (a) is a side view showing a state in which the terminal of the sixth modification is connected to a core wire of a cable and to a backlight for a liquid crystal display device, and fig. 18 (B) is a front view showing a state in which the terminal of the sixth modification is connected to the core wire of the cable and is not connected to the backlight for the liquid crystal display device.
Fig. 19 is a flowchart for explaining a method of connecting a terminal and a cable according to a modification.
Description of the reference symbols
1: a cable assembly;
2. 51, 52, 53, 54, 55, 56: a terminal;
3: a cable;
4: a core wire;
15. 62: a connecting portion;
16: a crimping part;
20: a core wire surrounding portion;
21: a core wire leading-out end portion;
22. 22a, 22b, 22c, 22d, 22 e: a curved surface portion;
100: a substrate (object to be connected);
102: a backlight (connection object) for a liquid crystal display device.
Detailed Description
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is widely applicable to a terminal for electrically connecting a cable to a connection target object such as a substrate to which the cable is to be connected, and a method for connecting the terminal to the cable.
Fig. 1 (a) and 1 (B) are perspective views showing a state in which the terminal 2 and the core wire 4 of the cable 3 according to the embodiment of the present invention are connected. Fig. 2 (a) is a plan view of the terminal 2 shown in fig. 1 (a), and fig. 2 (B) is a side view of the terminal 2 shown in fig. 1 (a). Fig. 3 is a diagram showing a state before the terminal 2 shown in fig. 1 (a) and 1 (B) is connected to the core wire 4 of the terminal portion of the cable 3, fig. 3 (a) is a perspective view seen from an upper side, and fig. 3 (B) is a perspective view seen from a lower side. Fig. 4 is a plan view showing a state before the terminals 2 shown in fig. 1 (a) and 1 (B) are separated from the carrier 8. Fig. 3 (a), 3 (B), and 4 show the terminal 2 before connection to the core wire 4 of the cable 3, and fig. 3 (a) and 3 (B) show the terminal 2 separated from the carrier 8 shown in fig. 4. Fig. 5 is a diagram showing a state in which the terminal 2 connected to the core wire 4 of the cable 3 is inserted into the through hole 100a of the substrate 100, fig. 5 (a) is a diagram showing a state before insertion, fig. 5 (B) is a diagram showing a state in the middle of insertion, and fig. 5 (C) is a diagram showing a state after insertion. Fig. 6 is a view showing a state in which the terminal 2 shown in fig. 5 (C) is soldered to the board 100.
The terminal 2 of the present embodiment is configured as a terminal connected to the core wire 4 at the end portion of the cable 3. The terminal 2 is connected to the substrate 100 in a state of being connected to the core wire 4 of the cable 3. That is, in the present embodiment, the connection object to which the cable 3 is connected via the terminal 2 is exemplified as the substrate 100.
The terminal 2 of the present embodiment is also referred to as a built-in terminal. The terminal 2 is connected to the core wire 4 of the terminal portion of the cable 3 in a state of being pressed against the core wire 4 of the cable 3 by pressing, and is inserted into the through hole 100a formed in the substrate 100. In this state, the terminal 2 and the board 100 are soldered, and thereby the core wire 4 connected to the terminal 2 and the board 100 are soldered and electrically connected. That is, the cable 3 and the board 100 are connected via the terminal 2 and are connected by soldering. Therefore, the terminal 2 functions as a soldering member used when the core wire 4 of the cable 3 is soldered to the board 100. In the present embodiment, the terminal 2 and the core wire 4 of the cable 3 are connected to each other, whereby the cable assembly 1 including the terminal 2 and the cable 3 connected to the terminal 2 is configured. And, the cable assembly 1 is connected to the substrate 100.
[ regarding the shape of the terminal before connection with the core wire of the cable ]
The terminal 2 is configured to be connectable to the core wire 4 at the terminal portion of the cable 3, or configured to be in a connected state, and the terminal 2 is soldered to the board 100 in a state of being inserted through the through hole 100a formed in the board 100. The terminal 2 is formed by punching a plate-shaped metal member by press working to have a predetermined shape. As shown in fig. 3 (a) and 3 (B), the terminal 2 has a central strip portion 11, a first side wall portion 12, and a second side wall portion 13, which are integrally formed.
The central strip portion 11 is a portion of the terminal 2 having the longitudinal direction L that constitutes a wall portion extending in a strip shape along the longitudinal direction L, and is provided to extend in a plate shape from one end portion to the other end portion in the longitudinal direction L of the terminal 2. The central strip portion 11 is provided as a plate-like portion elongated in the longitudinal direction L, has a predetermined thickness, and has a predetermined width dimension in a direction perpendicular to the longitudinal direction L of the terminal 2, that is, in the width direction W of the terminal 2. Note that, in fig. 1 (a), 1 (B), 2 (a), 2 (B), 3 (a), and 3 (B), the longitudinal direction L of the terminal 2 is indicated by a double-ended arrow L. Note that, in fig. 1 (a), 2 (a), and 3 (a), a width direction W of the terminal 2 is indicated by a double-ended arrow W.
The first side wall portion 12 is a portion constituting a wall portion provided on one side of the central strip portion 11 in the width direction W of the terminal 2. The first side wall portion 12 is provided integrally with an edge portion on one side in the width direction W of the central strip portion 11 and extends in the longitudinal direction L, and the first side wall portion 12 is slightly inclined to one side in the width direction W. The portion between the central band-shaped portion 11 and the first side wall portion 12 is formed in a curved surface shape.
The first sidewall 12 has a first cutout 12 a. The first notch 12a is formed at a portion closer to one end in the longitudinal direction L than a central portion in the longitudinal direction L of the first side wall 12. The first notch portion 12a is formed in the following state: the first side wall 12 is cut from the edge portion side extending in the longitudinal direction L on the opposite side of the portion provided integrally with the central strip portion 11 to the portion of the first side wall 12 provided integrally with the central strip portion 11.
The second side wall portion 13 is a portion constituting a wall portion provided on the other side of the center strip portion 11 in the width direction W of the terminal 2. The second side wall portion 13 is integrally provided at the edge portion on the other side in the width direction W of the central strip portion 11, and is provided so as to extend along the longitudinal direction L, and the second side wall portion 13 is slightly inclined toward the other side in the width direction W. The portion between the central band-shaped portion 11 and the second side wall portion 13 is formed in a curved surface shape.
The second side wall 13 is formed with a second notch 13 a. The second cutout 13a is formed at a portion on one end side in the longitudinal direction L with respect to a central portion in the longitudinal direction L of the second side wall portion 13. The second notch portion 13a is formed in the following state: a portion of the second side wall portion 13 that is cut from the edge portion side of the second side wall portion 13 that extends in the longitudinal direction L on the opposite side to the portion provided integrally with the central strip-shaped portion 11 to the side provided integrally with the central strip-shaped portion 11.
In a state before the terminal 2 is connected to the core wire 4 of the cable 3, as shown in fig. 3 (a) and 3 (B), the first side wall portion 12 and the second side wall portion 13 provided on both sides in the width direction W of the central band-shaped portion 11 are opened in a state of being opened while being inclined outward on both sides in the width direction W. The terminal 2 is configured to include the connection portion 15, the pressure-bonding section 16, and the connection portion 17 by the central strip portion 11, the first side wall portion 12, and the second side wall portion 13 formed as described above.
The connection portion 15 is provided as a portion to be connected to a connection object to which the cable 3 is connected via the terminal 2. In the present embodiment, the connection object is the substrate 100. Referring to fig. 3 (a) and 3 (B), the connection portion 15 includes a first connection portion 15a, a second connection portion 15B, and a central connection portion 15 c. The first connecting portion 15a is provided on the other end portion side in the longitudinal direction L of the first side wall portion 12 with respect to the first cutout portion 12 a. The second connecting portion 15b is provided on the other end side in the longitudinal direction L of the second side wall portion 13 with respect to the second notch portion 13 a. The central connecting portion 15c is provided as a portion of the central band-shaped portion 11 sandwiched between the first connecting portion 15a and the second connecting portion 15 b. In addition, in the connection portion 15, in a state before being connected to the cable 3, a dimension between an edge portion of the first connection portion 15a and an edge portion of the second connection portion 15b is set to be larger than an outer diameter of the core wire 4 of the cable 3 so that the core wire 4 of the cable 3 is arranged inside the connection portion 15.
The pressure-bonding section 16 is integrally connected to the connection section 15 and is pressure-bonded to a portion of the core wire 4 of the cable 3. Referring to fig. 3 (a) and 3 (B), the pressure-bonding section 16 includes a first pressure-bonding section 16a, a second pressure-bonding section 16B, and a center pressure-bonding section 16 c. The first pressure-bonding section 16a is provided on one end side in the longitudinal direction L of the first side wall 12 with respect to the first cutout section 12 a. The second pressure-bonding section 16b is provided at a portion of the second side wall 13 on one end side in the longitudinal direction L with respect to the second cutout 13 a. The central crimping portion 16c is provided as a portion of the central strip portion 11 sandwiched between the first crimping portion 16a and the second crimping portion 16 b. In the pressure-bonding section 16, before the pressure-bonding section is brought into pressure-bonding contact with the core wire 4 of the cable 3, the dimension between the edge of the first pressure-bonding section 16a and the edge of the second pressure-bonding section 16b is set to be larger than the outer diameter of the core wire 4 of the cable 3 so that the core wire 4 of the cable 3 is arranged inside the pressure-bonding section 16.
The connection portion 17 is a portion provided between the connection portion 15 and the pressure-bonding portion 16, and is provided as a portion integrally connecting the connection portion 15 and the pressure-bonding portion 16.
In addition, the terminal 2 has 3 spring portions 18 and 3 protruding portions 19. The spring portion 18 and the protrusion portion 19 are formed in the connecting portion 15.
The spring portions 18a, 18b, and 18c are provided as 3 spring portions 18. Referring to fig. 3 (a) and 3 (B), the spring portion 18a is formed at the other end portion side in the longitudinal direction L of the first connection portion 15 a. The spring portion 18b is formed at the other end portion side in the longitudinal direction L of the second connection portion 15 b. The spring portion 18c is formed at the other end portion side in the longitudinal direction L of the center connecting portion 15 c. Each spring portion 18 is formed in a plate spring shape by being cut and erected. Each spring portion 18 is configured such that a portion on the other end portion side in the longitudinal direction L is provided as a fulcrum portion integrally formed with the connecting portion 15, and each spring portion 18 is elastically deformable with the fulcrum portion as a fulcrum. Each spring portion 18 is formed in a cantilever beam shape that expands outward of the connecting portion 15 as it extends to one end portion side in the longitudinal direction L.
The 3 projections 19 include a projection 19a, a projection 19b, and a projection 19 c. Each of the projections 19 is provided on the connection portion 15 so as to project outward from the connection portion 15. The protruding portion 19a is formed at a portion of the first connecting portion 15a on one end side in the longitudinal direction L with respect to the spring portion 18 a. The protruding portion 19b is formed at a portion of the second connection portion 15b on the one end side in the longitudinal direction L with respect to the spring portion 18 b. The protruding portion 19c is formed at a portion of the central connection portion 15c on one end side in the longitudinal direction L with respect to the spring portion 18 c. The protruding portion 19a is a cut-and-raised portion formed so that the distal end portion extends toward one side in the width direction W. The protruding portion 19b is a cut-and-raised portion formed so that the distal end portion extends toward the other side in the width direction W. The protruding portion 19c is a portion formed by cutting and rising toward the outside of the connecting portion 15 at a portion between 2 slits extending in the width direction W formed at intervals in the longitudinal direction L.
[ shape of terminal in connection with core wire of cable ]
The terminal 2 has a shape shown in fig. 1 (a), 1 (B), 2 (a), and 2 (B) in a state of being connected to the core wire 4 of the cable 3. The cable 3 is configured to have, for example, the following portions: a core wire 4 provided in a state in which a plurality of metal wires are bundled, and configured as a conductor; and a resin coating portion 6 provided with an insulating resin material and surrounding the core wire 4. Further, the cable 3 is provided with a core wire exposed portion 5, which is a portion where the core wire 4 is exposed to the outside by cutting and peeling off the covering portion 6 at the end portion of the cable 3, and is connected to the terminal 2 at the core wire exposed portion 5.
In a state where the terminal 2 is connected to the core wire 4 of the cable 3, the connection portion 15 is bent in a state where a portion of the terminal end side of the core wire 4 at the core wire exposed portion 5 of the terminal end portion of the cable 3 is disposed inside the connection portion 15, whereby the connection portion 15 is provided in a cylindrical shape covering the core wire 4 from the outside. In the present embodiment, the connection portion 15 is provided in a cylindrical shape covering the core wire 4 over the entire outer circumference. Referring to fig. 1 and 2 and (C) and 6 of fig. 5, the connection portion 15 is provided as a portion inserted into the through hole 100a provided in the substrate 100 and connected to the substrate 100. The connection portion 15 is configured to be soldered to the substrate 100 in a state of being inserted through the through hole 100a provided in the substrate 100.
In addition, in a state where the terminal 2 is connected to the core wire 4 of the terminal portion of the cable 3, the 3 spring portions 18 in the connecting portion 15 are arranged at intervals in the circumferential direction of the connecting portion 15 provided in a cylindrical shape. The 3 projections 19 are also arranged at intervals in the circumferential direction of the connecting portion 15. In a state where the terminal 2 is connected to the cable 3, a portion between the 3 spring portions 18 and the 3 protruding portions 19 in the longitudinal direction L of the connecting portion 15 is arranged in a state where the terminal 2 is inserted into the through hole 100a of the substrate 100 and is inserted into the through hole 100 a. The outer diameter of the connection portion 15 connected to the core wire 4 of the cable 3 and provided in a cylindrical shape is set to be slightly smaller than the through hole 100a of the substrate 100, for example. Further, in a state where the terminal 2 is connected to the core wire 4 of the cable 3, the core wire 4 is arranged over substantially the entire length in the longitudinal direction L inside the connecting portion 15.
The pressure-bonding section 16 is bent in a state where a portion of the distal end side of the core 4 at the core exposed section 5 of the distal end portion of the cable 3 is arranged inside the pressure-bonding section 16, whereby the pressure-bonding section 16 is provided as a portion which is pressed and pressure-bonded with respect to the core 4. The pressure-bonding section 16 is configured to: the core wire 4 of the core wire exposed portion 5 is crimped with respect thereto, and the core wire 4 of the core wire exposed portion 5 is crimped with respect thereto at a position separated from the distal end portion of the covering portion 6 at the end portion of the cable 3.
In addition, the crimping portion 16 has a core wire surrounding portion 20, and the core wire surrounding portion 20 is provided to surround the outer periphery of the core wire 4 in the circumferential direction in a state where the terminal 2 is connected to the core wire 4 of the cable 3. The core wire surrounding portion 20 is provided to surround the core wire 4 in a state of extending along the longitudinal direction L of the terminal 2. The core wire surrounding portion 20 is pressed against the core wire 4 of the core wire exposing portion 5, and is provided with a flat cross-sectional shape in close contact with a portion on the base end side of the core wire exposing portion 5.
One end portion in the longitudinal direction L of the pressure-bonding section 16 constitutes an end portion of the terminal 2, and is provided integrally with the connection section 15 via the connection section 17 at the other end portion in the longitudinal direction L of the pressure-bonding section 16. An end portion of the pressure-bonding section 16 opposite to the side integrally connected to the connection section 15 (i.e., an end portion of the terminal 2) is configured as a core wire leading end portion 21, and the core wire leading end portion 21 is an end portion of the pressure-bonding section 16 from which the core wire 4 is led and extended.
In addition, the crimping portion 16 is provided with a curved surface portion 22 extending in an arc shape from the inside to the outside of the core wire surrounding portion 20 at the core wire lead-out end portion 21 along an edge portion of the core wire surrounding portion 20. That is, the curved surface portion 22 is provided as a portion formed in an arc shape in a cross section perpendicular to a direction along the edge portion of the core wire surrounding portion 20, that is, a circumferential direction. In the present embodiment, the curved surface portion 22 is provided along the edge portion of the core wire surrounding portion 20 over the entire circumference of the edge portion.
In addition, the curved surface portion 22 is constituted as a surface of a folded-back portion 23, and the folded-back portion 23 is formed by providing a plate-like portion 20a constituting the core wire surrounding portion 20 in a state of being folded back and overlapped at the core wire lead-out end portion 21. In addition, in the present embodiment, the folded-back portion 23 is provided in the following state: the plate-like portion 20a constituting the core wire surrounding portion 20 is folded back approximately 180 ° from the inside toward the outside of the core wire surrounding portion 20 at the core wire lead-out end portion 21 to be overlapped in two layers. The curved portion 22 constituting the surface of the folded portion 23 is provided to extend in a semicircular shape from the inside to the outside of the core wire surrounding portion 20.
[ connection of terminal to substrate ]
The terminal 2 is connected to the substrate 100 in a state where the core wire 4 of the cable 3 is crimped and connected. That is, in a state where the cable 3 is connected to the terminal 2 to form the cable assembly 1, the terminal 2 of the cable assembly 1 is inserted into the through hole 100a of the substrate 100 and connected to the substrate 100. A case where the terminal 2 of the cable assembly 1 is inserted into the through hole 100a of the substrate 100 will be described with reference to fig. 5.
When inserting the terminal 2 of the cable assembly 1 into the through hole 100a, the operator moves the cable assembly 1 toward the through hole 100a of the substrate 100 in a direction perpendicular to the substrate 100 (see fig. 5 a), and inserts the terminal 2 into the through hole 100a from the end portion side of the connecting portion 15 (see fig. 5B). As a result, as shown in fig. 5 (B), the spring portion 18 provided in the connecting portion 15 is elastically deformed toward the inside of the through hole 100a by the through hole 100 a.
When the operator moves the cable assembly 1 further in the direction perpendicular to the substrate 100 from the state shown in fig. 5B, the spring 18 passes through the through hole 100a and the portion between the spring 18 and the protruding portion 19 in the connecting portion 15 reaches the inside of the through hole 100a, and the spring 18 is elastically restored and restored (see fig. 5C). At the same time, as shown in fig. 5 (C), the protruding portion 19 abuts on the front surface 100b of the substrate 100. As a result, the substrate 100 is sandwiched between the spring portion 18 and the protruding portion 19, and as a result, the terminal 2 is fixed to the substrate 100. In this state (in other words, in a state where the terminal 2 is inserted into the through hole 100a of the substrate 100), the portion between the spring portion 18 and the protruding portion 19 in the connecting portion 15 is in a state of penetrating into the through hole 100 a.
In addition, in a state where the connection portion 15 penetrates the substrate 100, a part of the spring portion 18 (specifically, referring to fig. 5 (C), a distal end portion of the spring portion 18) is located outside the through hole 100a when viewed from a side protruding from the substrate 100 from a distal end side of the connection portion 15 in a direction perpendicular to the substrate 100 (viewed from an opposite side to an insertion direction of the terminal 2). Accordingly, even if the cable assembly 1 is pulled in the direction opposite to the insertion direction of the through hole 100a, the distal end portion of the spring portion 18 is hooked on the substrate 100, and therefore, the cable assembly 1 can be prevented from falling off from the substrate 100.
After the state shown in fig. 5 (C), soldering is performed between the core wire 4 and the substrate 100. Specifically, referring to fig. 6, soldering is performed between a pad provided on the back surface 100c of the board 100 and a portion of the connection portion 15 of the terminal 2 which protrudes from the back surface 100c of the board 100 and is exposed. Thereby, the molten solder is sucked into the gap between the connection portion 15 and the core wire 4 or between the plurality of metal wires constituting the core wire 4, and the lands of the substrate 100 and the core wire 4 are soldered. This enables the solder portion 101 to be provided between the core wire 4 and the substrate 100.
Further, referring to fig. 6, in the terminal 2 of the present embodiment, the spring portion 18 extending in the oblique direction with respect to the back surface 100c of the substrate 100 is disposed between the substrate 100 and a portion protruding from the substrate 100 of the portion of the terminal 2 formed on the distal end side of the cylindrical connecting portion 15. When soldering is performed between the outer peripheral surface of the connection portion 15 and the substrate 100 by the spring portion 18, the solder spreads between the outer peripheral surface of the connection portion 15 and the spring portion 18 and between the spring portion 18 and the substrate 100, and therefore, as shown in fig. 6, a solder portion 101 having an ideal fillet with a tip spreading from the tip side of the terminal 2 toward the back surface 100c side of the substrate 100 can be formed.
[ concerning the terminals before cutting off from the carrier ]
Referring to fig. 4, the terminals 2 of the present embodiment are arranged at equal intervals in a direction parallel to the width direction W of the terminals 2 before being separated from the carrier 8. In this state, if the interval between the adjacent terminals 2 can be reduced as much as possible, a large number of terminals 2 can be formed from a coil material which is a strip-shaped metal member.
In this regard, the pressure-bonding section 16 of the terminal 2 of the present embodiment is pressure-bonded to the core wire 4. In this way, for example, the length of the pressure-bonding section 16 in the width direction W can be shortened as compared with a case where the pressure-bonding section 16 is also pressed against the covering section 6 having a larger diameter size than the core wire 4. In this way, in the state shown in fig. 4, the interval between the adjacent terminals 2 can be reduced as compared with the case where the length of the pressure-bonding section 16 in the width direction W is long. That is, according to the terminal 2 of the present embodiment, a large number of terminals 2 can be efficiently formed from 1 roll.
The terminal 2 is connected to the carrier 8 at an end on the side where the connection portion 15 is provided before being separated from the carrier 8. The end of the terminal 2 on the side where the pressure-bonding section 16 is provided is disposed on the free end side of the terminal 2 extending in a cantilever manner from the carrier 8. The core wire leading end 21 of the pressure-bonding section 16 is disposed at an end of the terminal 2 opposite to the side connected to the carrier 8. Thereby, the core wire leading end 21 of the pressure-bonding section 16 provided with the curved portion 22 can be easily formed in a state where the terminal 2 and the carrier 8 are coupled.
Further, by providing the pressure-bonding section 16 which is crimped to the core wire 4 but not to the covering 6 as in the terminal 2 of the present embodiment, it is possible to prevent melting of the covering during soldering which may occur when the pressure-bonding section 16 is crimped to the covering 6.
Further, by providing the pressure-bonding section 16 that is pressure-bonded only to the core wire 4 as in the terminal 2 of the present embodiment, it is not necessary to provide a portion of the terminal 2 that is pressure-bonded to the covering section 6. In this way, for example, in the case of crimping the terminal 2 to a plurality of types of cables, if the outer diameters of the core wires are the same, the terminal 2 having the same size can be used even if the outer diameters of the covering portions are different. In other words, the terminal 2 according to the present embodiment can provide a terminal having high versatility.
[ method of connecting terminal and Cable ]
Next, a method of connecting the terminal and the cable to connect the terminal and the cable will be described. The method of connecting a terminal and a cable according to the present embodiment (hereinafter, also simply referred to as the connecting method according to the present embodiment) can be widely applied to a method of connecting a terminal and a cable. In the present embodiment, a connection method of the present embodiment will be described by taking a connection method of the terminal 2 and the cable 3 as an example. Fig. 7 is a flowchart for explaining an example of a method of connecting the terminal 2 and the cable 3 according to the embodiment of the present invention.
Referring to fig. 7, the connection method of the present embodiment includes a punching step S101, a folding-back step S102, a cutting-and-raising step S103, a bending step S104, a cutting-off step S105, a core wire arranging step S106, a connecting portion forming step S107, and a pressure bonding step S108.
Fig. 8 (a) and 8 (B) are diagrams for explaining the punching step S101 and the folding-back step S102 in the connection method of the present embodiment, fig. 8 (a) is a diagram for explaining the punching step S101, and fig. 8 (B) is a diagram for explaining the folding-back step S102.
Referring to fig. 8 (a), the punching step S101 is configured as a step of punching the blank 2A of the terminal 2 from the plate-shaped metal member. The blank 2A of the terminal 2 is formed into a portion of the terminal 2 by being molded through the folding-back step S102, the cutting-and-raising step S103, and the bending step S104. As the plate-like metal member of the blank 2A of the punched terminal 2, for example, a coil material formed by winding a plate-like metal member formed in a band shape into a coil shape is used. The coil material wound in a coil shape is stretched while being taken out, and punched out using a press die (not shown) configured as a die, thereby forming a blank 2A of the terminal 2. When the blank 2A of the terminal 2 is punched out from the coil, the blank 2A punched out of the terminal 2 can be arranged along the longitudinal direction of the coil, and the blank 2A of the terminal 2 can be efficiently formed.
When the blanks 2A of the terminals 2 are punched out from the coil in the punching step S101, as shown in fig. 8 (a), the blanks 2A of the plurality of terminals 2 are connected to the carrier 8 extending in a band shape, respectively, and the blanks 2A of the plurality of terminals 2 are formed in a state of being aligned along the carrier 8. The blank 2A of the terminal 2 is provided with a pressure-bonding part blank 16A which is a blank part of the pressure-bonding part 16, a connecting part blank 17A which is a blank part of the connecting part 17, and a connecting part blank 15A which is a blank part of the connecting part 15. The blank 2A of the terminal 2 is integrally connected to the carrier 8 in a state where the pressure-bonding part blank portion 16A, the connecting part blank portion 17A, and the connecting part blank portion 15A are sequentially arranged in series to be integrated. The blank 2A of the terminal 2 is connected to the carrier 8 in a state where the pressure-bonding section blank portion 16A, the connecting section blank portion 17A, and the connecting section blank portion 15A arranged in series extend in a direction extending perpendicular to the direction in which the carrier 8 extends in a band shape. The blank 2A of the terminal 2 is joined to the carrier 8 at the joint blank portion 15A.
After the punching step S101 is completed, the folding-back step S102 is performed. Referring to fig. 8 (B), the folding-back step S102 is configured as follows: the core wire leading end 21 of the crimp portion 16 of the terminal 2 provided with the curved surface portion 22 is formed by bending an edge portion on the tip end portion side of the crimp portion blank portion 16A so as to be folded back approximately 180 °. In the folding-back step S102, in a state where the blank 2A of the terminal 2 connected to the carrier 8 is fixed, a portion on the distal end side of the pressure-bonding section blank portion 16A is folded back by a press die constituting a bending die, and the core wire leading end portion 21 is formed. In a state after the folding-back step S102 is completed, the core wire drawing end 21 is provided as a portion folded back in a double-overlapped state at the end of the pressure-bonding section blank portion 16A.
After the folding-back step S102 is completed, a cutting-and-raising step S103 is performed. The cutting and raising step S103 is configured as follows: a plurality of spring portions 18 and a plurality of protruding portions 19 are formed on the connecting portion blank portion 15A in the blank 2A of the terminal 2 by the slitting-and-raising process. In the cutting and raising step S103, the blank 2A of the terminal 2 connected to the carrier 8 is subjected to cutting and raising processing of cutting and bending portions of a plurality of portions of the connecting portion blank portion 15A by a press die, thereby forming the spring portion 18 and the protruding portion 19.
After the cutting-and-raising step S103 is completed, a bending step S104 is performed. Fig. 9 is a diagram for explaining the bending step S104, and is a diagram showing the terminal 2 in a state of being coupled to the carrier 8, fig. 9 (a) is a plan view, fig. 9 (B) is a side view, and fig. 9 (C) is a front view.
Referring to fig. 9, the bending step S104 is configured as follows: the blank 2A of the terminal 2 is bent around a central axis, which is a direction perpendicular to the direction in which the carrier 8 extends in a band shape, by bending the blank by substantially 90 ° or more around the central axis, thereby forming the terminal 2 in a state before being connected to the carrier 8 and connected to the core wire 4 of the cable 3. More specifically, in the bending step S104, the connection portion blank portion 15A, the connection portion blank portion 17A, and the pressure-bonding section blank portion 16A of the blank 2A of the terminal 2 are bent around the central axis by approximately 90 ° or more, thereby forming the connection portion 15, the connection portion 17, and the pressure-bonding section 16 of the terminal 2 in a state before being connected to the core wire 4 of the cable 3.
In the bending step S104, the connection portion 15, the connection portion 17, and the pressure-bonding section 16 are formed by bending the connection portion blank portion 15A, the connection portion blank portion 17A, and the pressure-bonding section blank portion 16A in the blank 2A of each terminal 2 connected to the carrier 8 by using a press die configured as a bending die. That is, in the bending step S104, the connection portion 15 is formed by bending the connection portion blank portion 15A, the connection portion 17 is formed by bending the connection portion blank portion 17A, and the pressure-bonding section 16 is formed by bending the pressure-bonding section blank portion 16A. After the bending step S104 is completed, as shown in fig. 9, the terminal 2 is formed in a state of being connected to the carrier 8, and the central strip portion 11, the first side wall portion 12, and the second side wall portion 13 are formed in the terminal 2.
After the bending step S104 is completed, a cutting step S105 is performed. The separating step S105 is configured as a step of separating the terminal 2 from the carrier 8. In the present embodiment, in the separation step S105, the terminal 2 in a state before the core wires 4 of the cable 3 are connected is separated from the carrier 8. After the bending step S104 is completed and before the separation step S105 is performed, the terminal 2 is in a state before the core wire 4 is connected, and is connected to the carrier 8 at the end of the connecting portion 15 in a state where the first side wall portion 12 and the second side wall portion 13 are opened while being inclined outward in the width direction W. In this state, the separation step S105 is performed, and the connection portion between the end portion of the terminal 2 on the connection portion 15 side and the carrier 8 is cut off.
After the separation step S105, a core wire arrangement step S106 is performed. Fig. 10 (a) and 10 (B) are views for explaining the core wire arranging step S106, fig. 10 (a) is a view showing a state before the core wires 4 of the cable 3 are arranged at the terminal 2, and fig. 10 (B) is a view showing a state after the core wires 4 of the cable 3 are arranged at the terminal 2. Fig. 10 is a simplified illustration of the core wire 4 which is provided in a state where a plurality of wires are bundled to form a conductor.
Referring to fig. 10, in the core wire arranging step S106, the core wires 4 at the core wire exposed portion 5 on the distal end side of the cable 3 are arranged between the first side wall 12 and the second side wall 13 with respect to the terminal 2 in the state before the core wires 4 are connected, that is, the terminal 2 in the state in which the first side wall 12 and the second side wall 13 are opened with being inclined outward on both sides in the width direction W. In the core wire arranging step S106, when the core wire 4 at the distal end side of the cable 3 is arranged between the first side wall 12 and the second side wall 13, the core wire 4 is arranged in a state of extending along the longitudinal direction L of the terminal 2 and is arranged over the connection portion 15, the connection portion 17, and the pressure-bonding section 16.
As described above, in the core wire arranging step S106, the core wires 4 are arranged between the first side wall 12 and the second side wall 13, and thereby the core wires 4 are arranged in the connection portion 15 and the pressure-bonding portion 16. Thus, the core wire arranging step S106 is configured as follows: the core 4 of the terminal portion of the cable 3 is arranged at the crimp portion 16 in a state before the crimp portion 16 formed by bending the crimp portion blank part 16A is crimped to the core 4. Further, the core wire arranging step S106 is further configured to: the core wires 4 of the terminal portion of the cable 3 are arranged at the connection portion 15 in a state before the connection portion 15 formed by bending the connection portion blank portion 15A and the core wires 4 are connected.
After the core wire arranging step S106 is completed, a connection part forming step S107 of forming the connection part 15 connected to the core wire 4 of the cable 3 and a pressure bonding step S108 of forming the pressure bonding part 16 pressure bonded to the core wire 4 of the cable 3 and connected to the core wire 4 are performed. Fig. 11 is a diagram for explaining the connection portion forming step S107 and the pressure bonding step S108, and is a perspective view showing the die unit 30 used in the connection portion forming step S107 and the pressure bonding step S108.
Referring to fig. 11, the die unit 30 used in the connection portion forming step S107 and the pressure bonding step S108 includes a connection portion die 31 and a pressure bonding portion die 32. The connecting portion mold 31 is configured as a mold for forming the connecting portion 15 connected to the core wire 4. The die 32 for pressure-bonding section is configured as a die for forming the pressure-bonding section 16 in a state of being pressure-bonded to the core wire 4 and being connected to the core wire 4.
In the connecting portion forming step S107, the connecting portion 15 connected to the core wire 4 is formed by using the connecting portion mold 31 in the mold unit 30. Then, in the crimping step S108, the crimping portion 16 in a state where the crimping portion 16 is crimped to the core wire 4 and connected to the core wire 4 is formed by using the die 32 for crimping portion in the die unit 30.
The connection portion forming step S107 and the pressure bonding step S108 may be performed simultaneously. In this case, the operation of forming the connection portion 15 and the pressure-bonding section 16 connected to the core wire 4 is performed simultaneously using the connection portion mold 31 and the pressure-bonding section mold 32. Further, the connection portion forming step S106 may be performed first, and then the pressure bonding step S108 may be performed. In this case, the operation of forming the connection portion 15 connected to the core wire 4 using the connection portion mold 31 is performed first, and then the operation of forming the pressure-bonding portion 16 connected to the core wire 4 using the pressure-bonding portion mold 32 is performed. In the flowchart of fig. 7, the case where the connection portion forming step S107 is performed first and then the pressure bonding step S108 is performed is exemplified. Further, the pressure bonding step S108 may be performed first, and then the connection portion forming step S107 may be performed. In this case, the operation of forming the pressure-bonding section 16 in a state of being connected to the core wire 4 using the pressure-bonding section mold 32 is first performed, and then the operation of forming the connection section 15 in a state of being connected to the core wire 4 using the connection section mold 31 is performed.
Referring to fig. 11, the connecting portion mold 31 used in the connecting portion forming step S107 is configured to include an upper tooth mold 31a and a lower tooth mold 31 b. In the joint forming step S107, the joint 15 on which the core wires 4 are arranged is sandwiched and pressed by the joint mold 31 having the upper tooth mold 31a and the lower tooth mold 31b, and the joint 15 is bent into a cylindrical shape so as to cover the core wires 4. Thereby, the connection portion 15 is formed in a state of covering the core wire 4 from the outside.
The upper die 31a of the connecting portion die 31 is provided with a first molding groove portion 35a, a second molding groove portion 36a, and a third molding groove portion 37a, which are each formed as a groove-like depression. The first forming groove portion 35a, the second forming groove portion 36a, and the third forming groove portion 37a are provided in the upper tooth die 31a in series. In the upper die 31a, a first slit portion 38a is provided between the first molded groove portion 35a and the second molded groove portion 36a, and a second slit portion 39a is provided between the second molded groove portion 36a and the third molded groove portion 37 a.
The overall shape of the lower tooth die 31b of the connecting portion die 31 is formed as follows: has a substantially isosceles triangle-shaped cross section, and the apex-side portions in the substantially isosceles triangle-shaped cross section are narrowed so as to be narrowed in width in such a manner as to be fitted into the first, second, and third shaped groove portions 35a, 36a, and 37a of the upper tooth die 31 a. Further, in the lower die 31b, a first forming recess 35b, a second forming recess 36b, and a third forming recess 37b, which are formed to be recessed in an arc shape, are provided at the end portions on the apex side where the width is narrowed so as to fit into the upper die 31 a. The first forming recessed portion 35b, the second forming recessed portion 36b, and the third forming recessed portion 37b are provided in series on the lower tooth die 31 b. In the lower tooth die 31b, a first slit portion 38b is provided between the first molding recess 35b and the second molding recess 36b, and a second slit portion 39b is provided between the second molding recess 36b and the third molding recess 37 b.
In the connecting portion forming step S107, when the connecting portion 15 in which the core wires 4 are arranged is sandwiched between the upper tooth die 31a and the lower tooth die 31b, the first forming groove portion 35a faces the first forming recess portion 35b, the second forming groove portion 36a faces the second forming recess portion 36b, and the third forming groove portion 37a faces the third forming recess portion 37b in the upper tooth die 31a and the lower tooth die 31 b. Further, the first molding groove portion 35a and the first molding recess portion 35b press the portion of the connection portion 15 on the distal end side of the spring portion 18 to be bent into a cylindrical shape so as to cover the core wire 4. Further, the portion between the spring portion 18 and the protruding portion 19 in the connecting portion 15 is pressed by the second molding groove portion 36a and the second molding recess portion 36b to be bent into a cylindrical shape so as to cover the core wire 4. Further, the portion of the connection portion 15 on the side of the connection portion 17 with respect to the protruding portion 19 is pressed by the third molding groove portion 37a and the third molding recess portion 37b to be bent into a cylindrical shape so as to cover the core wire 4. When the connection portion 15 of the core wire 4 is sandwiched and arranged between the upper tooth die 31a and the lower tooth die 31b, the first slit portion 38a and the second slit portion 39a face each other, and the first slit portion 38b and the second slit portion 39b face each other in the upper tooth die 31a and the lower tooth die 31b, respectively. Thus, the upper tooth die 31a and the lower tooth die 31b are configured such that the spring portion 18 is arranged in the space between the first slit portion 38a and the first slit portion 38b without pressing the spring portion 18. The upper tooth die 31a and the lower tooth die 31b are configured such that the protruding portion 19 is arranged in a space between the second slit portion 39a and the second slit portion 39b without pressing the protruding portion 19.
Fig. 12 is a diagram for explaining the pressure bonding step S108, and is a diagram showing a state in which the terminal 2 is pressure bonded to the core wire 4 by the pressure bonding section mold 32. In fig. 12, a cross section of the die 32 for pressure-bonding section in a state where the terminal 2 is pressure-bonded to the core wire 4 is shown. Referring to fig. 11 and 12, the die 32 for pressure-bonding section used in the pressure-bonding step S108 includes a first tooth mold section 33 and a second tooth mold section 34. The first and second tooth mold portions 33 and 34 are provided separately from each other. The first dental mold part 33 is provided to sandwich and press the dental mold part of the core wire surrounding part 20 in the pressure-bonding part 16, and is configured to include an upper dental mold 33a and a lower dental mold 33 b. The second toothed mold part 34 is provided to sandwich and press the toothed mold part of the core wire drawing end part 21 in the pressure-bonding section 16, and is configured to include an upper toothed mold 34a and a lower toothed mold 34 b.
The pressure bonding step S108 is configured as follows: the core wire 4 is crimped by the pressure-bonding section 16, in which the core wire 4 is arranged, by being sandwiched and pressed by a mold 32 for pressure-bonding section, the mold 32 for pressure-bonding section including a first tooth mold 33 having an upper tooth mold 33a and a lower tooth mold 33b, and a second tooth mold 34 having an upper tooth mold 34a and a lower tooth mold 34 b. In the pressure bonding step S108, the first tooth mold portion 33 and the second tooth mold portion 34 are used in a state of being overlapped. That is, in the pressure bonding step S108, the pressure bonding section 16 on which the core wire 4 is arranged is sandwiched and pressed by the pressure bonding section mold 32 in a state where the upper tooth mold 33a of the first tooth mold part 33 and the upper tooth mold 34a of the second tooth mold part 34 overlap each other and the lower tooth mold 33b of the first tooth mold part 33 and the lower tooth mold 34b of the second tooth mold part 34 overlap each other, whereby the core wire 4 is pressure bonded to the pressure bonding section 16.
Further, the upper die 33a of the first die 33 is provided with a molding groove portion 40a formed as a groove-like depression. The lower tooth mold 33b of the first tooth mold part 33 includes: a portion having a substantially isosceles triangular shaped cross section, a prismatic portion formed in a shape extending from a vertex side of the portion having a substantially isosceles triangular shaped cross section and embedded in the molding groove portion 40a of the upper tooth die 33 a. The lower die 33b is provided with a molding recess 40b formed in an arc shape and recessed at an end of a portion formed in a prism shape to be fitted into the upper die 33 a.
Further, the upper die 34a of the second die portion 34 is provided with a molding groove portion 41a formed as a groove-like depression. The lower tooth mold 34b of the second tooth mold portion 34 includes: a portion having a substantially isosceles triangular shaped cross section, and a prismatic portion formed into a shape extending from a vertex side of the portion having a substantially isosceles triangular shaped cross section and being embedded in the molding groove portion 41a of the upper tooth die 34 a. The lower die 34b is provided with a molding recess 41b formed in an arc shape at an end of a portion formed in a prism shape to be fitted into the upper die 34 a.
In the pressure bonding step S108, the pressure bonding section 16 on which the core wire 4 is arranged is sandwiched and pressed by the mold 32 for pressure bonding section in a state where the first tooth mold section 33 and the second tooth mold section 34 are overlapped. At this time, the core wire surrounding part 20 in the pressure-bonding part 16 where the core wire 4 is arranged is sandwiched by the upper dental mold 33a and the lower dental mold 33b in the first dental mold part 33. At this time, in the upper tooth die 33a and the lower tooth die 33b, the molding groove 40a faces the molding recess 40 b. Further, the portion of the core wire surrounding portion 20 in the pressure-bonding section 16 is pressed and pressed against the core wire 4 by the molding groove portion 40a and the molding recess portion 40b, and is pressure-bonded to the core wire 4.
Further, when the pressure-bonding section 16 in which the core wire 4 is arranged is sandwiched and pressed by the mold 32 for pressure-bonding section in the pressure-bonding step S108, the core wire leading end 21 in the pressure-bonding section 16 in which the core wire 4 is arranged is sandwiched by the upper dental mold 34a and the lower dental mold 34b in the second dental mold 34. At this time, the molding groove 41a faces the molding recess 41b in the upper punch 34a and the lower punch 34 b. Then, the portion of the core wire leading end 21 in the pressure-bonding section 16 is pressed and pressed against the core wire 4 by the molding groove section 41a and the molding recess 41b, and is crimped against the core wire 4.
In addition, in the pressure-bonding section 16, a folded-back portion 23 is provided in a state where a plate-like portion 20a constituting the core wire surrounding section 20 is folded back and overlapped from the inside toward the outside of the core wire surrounding section 20 at the core wire lead-out end portion 21. Therefore, the pressure-bonding section 16 is configured to: in a state of being pressed against the core wire 4, the core wire leading end portion 21 has a larger diameter size than the core wire surrounding portion 20 in a state of covering the core wire 4 in a surrounding manner. That is, the pressure-bonding section 16 is provided in a state where the core lead-out end 21 is expanded in diameter in a stepwise manner with respect to the core surrounding section 20 in a state where the pressure-bonding section is pressure-bonded to the core 4. Accordingly, in the first dental mold part 33, the dimension of the gap between the molding groove part 40a of the upper dental mold 33a and the molding recess part 40b of the lower dental mold 33b in a state in which the core wire surrounding part 20 is sandwiched and pressed is set to a dimension corresponding to the diameter dimension of the core wire surrounding part 20 in a state in which the core wire 4 is surrounded and covered. In the second tooth mold portion 34, the dimension of the gap between the molding groove portion 41a of the upper tooth mold 34a and the molding recess portion 41b of the lower tooth mold 34b in a state in which the core wire lead-out end portion 21 is sandwiched and pressed is set to a dimension corresponding to the diameter dimension of the core wire lead-out end portion 21.
After the crimping step S108 is completed, the connection method of the present embodiment for connecting the terminal 2 and the cable 3 is completed. The connection method of the present embodiment is completed, and the terminal 2 is connected to the cable 3, thereby configuring the cable assembly 1.
[ Effect of the present embodiment ]
As described above, according to the present embodiment, the core wire 4 at the end portion of the cable 3 is crimped to the crimping section 16, whereby the terminal 2 is connected to the cable 3, and the connection section 15 to which the terminal 2 of the cable 3 is connected to the substrate 100 as a connection object, whereby the cable 3 and the substrate 100 are connected via the terminal 2. Also, the core wire 4 of the cable 3 is pressed against the crimping portion 16 of the terminal 2 in a state where the outer periphery is surrounded by this core wire surrounding portion 20, and the core wire 4 is drawn out from the crimping portion 16 in a state where it extends along a curved surface portion 22 which is provided along an edge portion of a core wire drawing end portion 21 drawn out from the crimping portion 16 and which extends in an arc shape from the inside to the outside of the core wire surrounding portion 20. Therefore, the load is suppressed from locally concentrating on the core wire 4 of the cable 3 at the edge portion of the pressure-bonding section 16, and the core wire 4 is supported in a state where the load is dispersed on the curved surface portion 22 of the core wire leading-out end portion 21. This reduces the load on the core wires 4 when the cable 3 is bent, and thus can suppress damage to the core wires 4.
Further, according to the present embodiment, the load of the core wire 4 when the cable 3 is bent is reduced to suppress damage to the core wire 4, and the terminal portion of the cable 3 is connected to the terminal 2 only by crimping the core wire 4 to the crimping portion 16 of the terminal 2. Therefore, it is not necessary to separately provide a reinforcing member for reducing the load of the core wires 4 when the cable 3 is bent to suppress damage to the core wires 4. Therefore, according to the present embodiment, the load of the core wires 4 when the cable 3 is bent can be reduced to suppress damage to the core wires 4, and the number of components and the number of man-hours for connecting the terminal 2 and the cable 3 can be suppressed from increasing.
In addition, according to the present embodiment, the terminal portion of the cable 3 is connected to the terminal 2 only by crimping the core wire 4 to the crimping portion 16 of the terminal 2. That is, the terminal 2 is crimped only to the core wire 4 of the cable 3, and is not crimped to the resin-made covering portion 6 of the cable 3. Further, according to the present embodiment, since a resin member for reinforcement is not separately provided, it is not pressed against the resin member for reinforcement. Therefore, even when the terminal 2 connected to the cable 3 is connected to the board 100 by a method involving heating at a high temperature such as soldering, the heat from the terminal 2 is not directly transmitted to the resin-made member on the cable 3 side such as the covering portion 6 of the cable 3. This can suppress the influence of heat applied to the terminal 2 on the resin member on the cable 3 side when the cable 3 is connected to the board 100 via the terminal 2.
Therefore, according to the present embodiment, it is possible to provide the terminal 2 capable of reducing the load of the core wire 4 when the cable 3 is bent, suppressing damage to the core wire 4, suppressing an increase in the number of components and man-hours for connecting the terminal 2 and the cable 3, and suppressing an influence of heat applied to the terminal 2 when the cable 3 is connected to the board 100 via the terminal 2 on the resin-made component on the cable 3 side.
In the present embodiment, the object to be connected is the substrate 100, and the terminal 2 to which the cable 3 is connected in a substantially perpendicular posture to the substrate 100, whereby the terminal 2 is mounted on the substrate 100. Therefore, the mounting height of the terminal 2 with respect to the substrate 100 is determined according to the height of the crimp portion 16 vertically protruding from the surface 100b of the substrate 100 in the terminal 2. Further, according to the present embodiment, the pressure-bonding section 16 of the terminal 2 is in pressure contact with only the core wire 4 of the cable 3, and is not in pressure contact with the resin-made covering section 6 of the cable 3. Thus, according to the terminal 2 of the present embodiment, the length of the pressure-bonding section 16 of the terminal 2 can be shortened as compared with a terminal of a type of pressure-bonding to both the core wire 4 and the covering section 6 of the cable 3. Therefore, according to the present embodiment, the height at which the terminal 2 protrudes perpendicularly from the substrate 100 can be reduced, and the mounting height of the terminal 2 on the substrate 100 can be reduced.
In addition, according to the present embodiment, by providing the portion in a state where the core wire leading end portion 21 is folded back and overlapped, the curved surface portion 22 extending in a semicircular shape from the inside to the outside of the core wire surrounding portion 20 can be easily formed. Further, since the curved portion 22 provided along the edge portion of the core wire leading end portion 21 and extending in an arc shape from the inside to the outside of the core wire surrounding portion 20 is provided in a semicircular shape, even when the bending angle of the cable 3 is large, the load of the core wire 4 when the cable 3 is bent can be reduced and damage to the core wire 4 can be suppressed.
In addition, according to the present embodiment, the plate-like portion 20a constituting the core wire surrounding portion 20 at the core wire leading end portion 21 is provided in a state of being folded back and overlapped from the inside toward the outside of the core wire surrounding portion 20. Therefore, the core wire 4 drawn and extended from the inside to the outside of the core wire surrounding portion 20 is arranged and extended so as to extend more smoothly along the curved surface portion 22. Therefore, the load is further suppressed from locally concentrating on the core wire 4 of the cable 3 at the edge portion of the pressure-bonding section 16, and the core wire 4 is supported in a state where the load is further dispersed on the curved surface portion 22 of the core wire lead-out end portion 21. This can further reduce the load on the core wires 4 when the cable 3 is bent, and can further suppress damage to the core wires 4.
In addition, according to the present embodiment, the connection portion 15 connected to the substrate 100 is provided in a cylindrical shape covering the core wire 4, and the cylindrical connection portion 15 is soldered in a state of being inserted through the through hole 100a of the substrate 100. Therefore, by making the inner diameter of the through-hole 100a slightly larger than the outer diameter of the cylindrical connection portion 15, the gap between the connection portion 15 and the through-hole 100a can be reduced in a state where the terminal 2 is inserted through the through-hole 100a of the substrate 100. Alternatively, when the tubular connection portion 15 is configured to be elastically deformable and to be reduced in diameter when an external force acts from the outer periphery to the radially inner side, the inner diameter of the through hole 100a may be made equal to the outer diameter of the tubular connection portion 15, or the inner diameter of the through hole 100a may be made slightly smaller than the outer diameter of the tubular connection portion 15. By setting the inner diameter of the through-hole 100a and the outer diameter of the tubular connecting portion 15 in this manner, the gap between the connecting portion 15 and the through-hole 100a can be made extremely small in a state where the terminal 2 is inserted through the through-hole 100a of the substrate 100. Then, in a state before the terminal 2 is inserted through the through hole 100a of the substrate 100 and the core wire 4 is soldered to the substrate 100, the terminal 2 is not likely to be greatly inclined with respect to the substrate 100. Thus, the core wire 4 and the board 100 can be soldered while the cable 3 is held substantially perpendicular to the board 100.
Further, according to the present embodiment, by making the inner diameter of the through-hole 100a slightly larger than the outer diameter of the tubular connection portion 15, the gap between the connection portion 15 and the through-hole 100a can be reduced in a state where the terminal 2 is inserted through the through-hole 100a of the substrate 100. Alternatively, when the tubular connection portion 15 is elastically deformable to be reduced in diameter, the clearance between the connection portion 15 and the through hole 100a can be made extremely small in a state where the terminal 2 is inserted through the through hole 100a of the substrate 100 by making the inner diameter of the through hole 100a equal to the outer diameter of the tubular connection portion 15 or making the inner diameter of the through hole 100a slightly smaller than the outer diameter of the tubular connection portion 15. Therefore, when the substrate 100 and the core wire 4 are soldered, the molten solder is easily absorbed into the gap by capillary action. Thereby, the amount of solder that goes between the substrate 100 and the core wire 4 can be ensured.
In addition, according to the connection method of the present embodiment (the connection method of the terminal 2 and the cable 3), after the blank 2A of the terminal 2 is punched out of a plate-like metal member, the pressure-bonding section blank portion 16A is bent so as to be folded back, and the core wire lead-out end portion 21 provided with the curved surface portion 22 can be easily formed. Further, by arranging the core wire 4 in the pressure-bonding section blank portion 16A, and sandwiching and pressing the core wire 4 between the upper teeth molds (33a, 34a) and the lower teeth molds (33b, 34b), the terminal 2 can be pressure-bonded to the core wire 4 at the pressure-bonding section 16, and the terminal 2 and the cable 3 can be connected. In addition, in a state where the terminal 2 and the cable 3 are connected by the connection method of the present embodiment, the load of the core wire 4 when the cable 3 is bent can be reduced and the damage of the core wire 4 can be suppressed by the curved surface portion 22 of the edge portion of the pressure-bonding section 16. In a state where the terminal 2 and the cable 3 are connected by the connection method of the present embodiment, the terminal portion of the cable 3 is connected to the terminal 2 only by crimping the core wire 4 to the crimping portion 16 of the terminal 2. Therefore, it is not necessary to separately provide a reinforcing member for suppressing damage to the core wire 4, and the number of members and the number of man-hours for connecting the terminal 2 and the cable 3 can be suppressed from increasing. In the state where the terminal 2 and the cable 3 are connected by the connection method of the present embodiment, the terminal portion of the cable 3 is connected to the terminal 2 only by crimping the core wire 4 to the crimping portion 16 of the terminal 2, and therefore, neither crimping to the resin-made covering portion 6 in the cable 3 nor separate provision of a reinforcing resin member is required. Therefore, even when the terminal 2 connected to the cable 3 is connected to the board 100 by a method involving heating at a high temperature such as soldering, the heat from the terminal 2 is not directly transmitted to the resin-made member on the cable 3 side such as the covering portion 6 of the cable 3. This can suppress the influence of heat applied to the terminal 2 on the resin member on the cable 3 side when the cable 3 is connected to the board 100 via the terminal 2.
Therefore, according to the present embodiment, it is possible to provide a method of connecting a terminal 2 and a cable 3, which can reduce the load of the core wire 4 when the cable 3 is bent, suppress damage to the core wire 4, suppress an increase in the number of components and man-hours for connecting the terminal 2 and the cable 3, and suppress an influence of heat added to the terminal 2 on a resin-made component on the cable 3 side when the cable 3 is connected to the substrate 100 via the terminal 2.
In addition, according to the connection method of the present embodiment, the die 32 for pressure-bonding section is provided with the first and second tooth dies 33 and 34 that sandwich and press the core wire surrounding section 20 and the core wire lead-out end section 21, respectively. Therefore, it is possible to easily set the configuration of the mold 32 for crimping portion that accurately fits the difference in the respective shapes of the core wire surrounding portion 20 that covers the outer periphery of the core wire 4 in a surrounding manner and is crimped to the core wire 4 and the core wire lead-out end portion 21 that is provided with the curved surface portion 22 by bending the crimping portion blank portion 16A in a folded-back manner. Further, by 1 pressing operation of sandwiching and pressing the pressure-bonding section blank portion 16A in which the core wire 4 is arranged by the pressure-bonding section mold 32 having the first tooth mold 33 and the second tooth mold 34, the core wire surrounding section 20 and the core wire lead-out end 21 can be simultaneously pressed, and the core wire 4 can be brought into a state of being pressure-bonded by the pressure-bonding section 16. Therefore, in the method for connecting the terminal 2 and the cable 3, which can reduce the load of the core wire 4 when the cable 3 is bent and suppress damage to the core wire 4, the pressure-bonding of the core wire 4 and the terminal 2 can be easily and efficiently performed.
In addition, according to the connection method of the present embodiment, the pressure-bonding section mold 32 is configured in a state in which the first tooth mold section 33 and the second tooth mold section 34, which are separate bodies, overlap each other. Therefore, the structure of the die 32 for pressure-bonding section can be set more easily, which accurately conforms to the difference in the shape of each of the core surrounding section 20 and the core leading end section 21. Further, since the first tooth mold part 33 and the second tooth mold part 34 can be formed and combined separately, the manufacturing of the pressure-bonding section mold 32 becomes easy, and the degree of freedom in designing the structure of the pressure-bonding section mold 32 can be improved.
[ modified examples ]
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and can be implemented by being variously modified within the scope described in the claims. For example, the following modifications may be implemented.
(1) In the embodiment described above, the following is exemplified: at the core-wire leading-out end portion 21 of the pressure-bonding section 16, a curved surface portion 22 provided along an edge portion of the core-wire surrounding portion 20 is provided as a surface of a folded-back portion 23 formed by providing a plate-like portion 20a constituting the core-wire surrounding portion 20 in a state of being folded back and overlapped from the inside toward the outside of the core-wire surrounding portion 20 at the core-wire leading-out end portion 21, but this may not be the case. For example, a mode of implementing a terminal having a curved surface portion provided as a surface of the folded-back portion 23 formed by providing a plate-like portion 20a constituting the core wire surrounding portion 20 in a state where it is folded back and overlapped from the outside toward the inside of the core wire surrounding portion 20 at the core wire lead-out end portion 21 is also possible.
Fig. 13 is a diagram showing a terminal 51 of a first modification, fig. 13 (a) is a perspective view showing a state before the terminal 51 of the first modification is connected to the core wire 4 of the cable 3, and fig. 13 (B) is a perspective view showing a state in which the terminal 51 of the first modification is connected to the core wire 4 of the cable 3 and the core wire 4 is omitted from illustration. The terminal 51 shown in fig. 13 is configured similarly to the terminal 2 of the embodiment. However, the configuration of the curved portion 22a of the terminal 51 provided at the core wire leading end 21 of the pressure-bonding section 16 is different from that of the curved portion 22 provided at the core wire leading end 21 of the pressure-bonding section 16 of the terminal 2. In the following description of the terminal 51 of the first modification, a description will be given of a configuration of the curved surface portion 22a different from that of the above-described embodiment, and the same reference numerals are given to the same or corresponding configurations as those of the above-described embodiment, and thus redundant description will be omitted.
The folded-back portion 23 in the pressure-bonding section 16 of the terminal 51 is formed by arranging a plate-like portion 20a constituting the core wire surrounding section 20 in a state of being folded back from the outside toward the inside of the core wire surrounding section 20 at the core wire lead-out end 21 so as to be overlapped. Further, a curved surface portion 22a provided along an edge portion of the core surrounding portion 20 at the core leading end portion 21 of the pressure-bonding section 16 of the terminal 51 is provided as a surface of a folded-back portion 23, and the folded-back portion 23 is formed by providing a plate-like portion 20a constituting the core surrounding portion 20 in a state of being folded back and overlapped from the outside toward the inside of the core surrounding portion 20 at the core leading end portion 21. Thereby, the curved surface portion 22a is provided to extend in a semicircular shape from the inside to the outside of the core wire surrounding portion 20.
As described above, the terminal 51 having the curved surface portion 22a may be implemented in such a manner that the curved surface portion 22a is provided as the surface of the folded-back portion 23, and the folded-back portion 23 is formed by providing the plate-like portion 20a constituting the core wire surrounding portion 20 at the core wire lead-out end portion 21 of the pressure-bonding section 16 in a state of being folded back from the outside toward the inside of the core wire surrounding portion 20.
(2) In the embodiment described above, the explanation has been given taking as an example the case where the folded-back portion 23 is provided at the core wire leading end 21 of the pressure-bonding section 16, and the curved surface portion 22 is provided as the surface of the folded-back portion 23, but this may not be the case. For example, a terminal in which a curved portion is formed at a portion on the distal end side of the plate-like portion 20a constituting the core wire surrounding portion 20 without providing the folded-back portion 23 may be implemented.
Fig. 14 is a diagram showing a terminal 52 of a second modification, fig. 14 (a) is a perspective view showing a state before the terminal 52 of the second modification is connected to the core wire 4 of the cable 3, fig. 14 (B) is a diagram showing a part of the pressure-bonding section 16 of the terminal 52 shown in fig. 14 (a) in an enlarged manner, and fig. 14 (C) is a perspective view showing a state in which the terminal 52 of the second modification is connected to the core wire 4 of the cable 3 and the core wire 4 of the cable 3 is omitted. The terminal 52 shown in fig. 14 is configured similarly to the terminal 2 of the above-described embodiment. However, the configuration of the curved portion 22b of the terminal 52 provided at the core wire leading end 21 of the pressure-bonding section 16 is different from that of the curved portion 22 provided at the core wire leading end 21 of the pressure-bonding section 16 of the terminal 2. In the following description of the terminal 52 according to the second modification, the structure of the curved surface portion 22b different from that of the above-described embodiment is described, and the same reference numerals are given to the same or corresponding structures as those of the above-described embodiment, and thus redundant description is omitted.
In the crimping portion 16 of the terminal 52, the plate-like portion 20a constituting the core surrounding portion 20 is not folded back at the core leading-out end portion 21, and a portion corresponding to the folded-back portion 23 in the crimping portion 16 of the terminal 2 is not provided. At the core-drawn end 21 of the crimp portion 16 of the terminal 52, a curved portion 22b is provided from an inner peripheral surface of a portion on the distal end side in the longitudinal direction L of the plate-like portion 20a constituting the core surrounding portion 20 to an end surface on the distal end side. The curved surface portion 22b is provided as a portion of a curved surface: the plate-like portion 20a extends from the inner peripheral surface of the distal end side portion in the longitudinal direction L to the distal end side end surface, and extends in an arc shape from the inside to the outside of the core wire surrounding portion 20. The plate thickness of the portion provided with the curved surface portion 22b at the distal end side in the longitudinal direction L of the plate-shaped portion 20a is formed to become thinner toward the distal end side in the longitudinal direction L.
As described above, the terminal 52 having the curved surface portion 22b may be implemented such that the curved surface portion 22b is provided to expand in an arc shape from the inner peripheral surface of the portion on the distal end side of the plate-shaped portion 20a constituting the core wire surrounding portion 20 to the end surface on the distal end side at the core wire drawing end portion 21 of the pressure-bonding section 16.
(3) In the above-described embodiment, the explanation has been given by taking as an example a case where the folded-back portion 23 in which the plate-like portion 20a constituting the core surrounding portion 20 is folded back and overlapped and the curved surface portion 22 are provided at the core leading end portion 21 of the pressure-bonding section 16 as the surface of the folded-back portion 23, but this may not be the case. For example, the following terminal modes may be implemented: the folded-back portion 23 is not provided, and a portion on the distal end side of the plate-like portion 20a constituting the core wire surrounding portion 20 is provided with a curved portion that expands toward the outside of the core wire surrounding portion 20 and is curved so as to form a curved surface.
Fig. 15 is a diagram showing a terminal 53 of a third modification, fig. 15 (a) is a perspective view showing a state before the terminal 53 of the third modification is connected to the core wire 4 of the cable 3, and fig. 15 (B) is a perspective view showing a state in which the terminal 53 of the third modification is connected to the core wire 4 of the cable 3 and the core wire 4 of the cable 3 is omitted from illustration. The terminal 53 shown in fig. 15 is configured similarly to the terminal 2 of the embodiment. However, the configuration of the curved portion 22c of the terminal 53 provided at the core wire leading end 21 of the pressure-bonding section 16 is different from that of the curved portion 22 provided at the core wire leading end 21 of the pressure-bonding section 16 of the terminal 2. In the following description of the terminal 53 according to the third modification, a description will be given of a structure of the curved surface portion 22c different from that of the above-described embodiment, and the same reference numerals are given to the same or corresponding structures as those of the above-described embodiment, and thus redundant description will be omitted.
In the pressure-bonding section 16 of the terminal 53, the plate-like portion 20a constituting the core surrounding section 20 is not folded back at the core drawing end 21, and a portion corresponding to the folded-back portion 23 in the pressure-bonding section 16 of the terminal 2 is not provided. In the core leading end portion 21 of the crimp portion 16 of the terminal 53, a portion on the distal end side in the longitudinal direction L of the plate-like portion 20a constituting the core surrounding portion 20 is formed so as to spread toward the outside of the core surrounding portion 20 and to be bent so as to form a curved surface. Further, at the core-drawn end 21 of the crimp portion 16 of the terminal 53, a curved surface portion 22c is provided at a portion on a distal end side in the longitudinal direction L of a plate-like portion 20a which is expanded outward of the core surrounding portion 20 and is curved so as to form a curved surface. The curved surface portion 22c is provided as a portion that extends from the inner peripheral surface of a portion on the distal end side in the longitudinal direction L to the end surface on the distal end side in the plate-like portion 20a that is bent so as to extend outward of the core wire surrounding portion 20 and is a curved surface that extends in an arc shape from the inside to the outside of the core wire surrounding portion 20.
As described above, the terminal 53 having the curved surface portion 22c may be implemented such that the curved surface portion 22c is provided so as to extend in an arc shape from the inner peripheral surface of the portion on the distal end side to the end surface on the distal end side of the plate-like portion 20a bent so as to extend outward of the core surrounding portion 20 at the core leading end portion 21 of the pressure-bonding section 16.
(4) In the embodiment described above, the following is exemplified: a folded portion 23 in which a plate-like portion 20a constituting the core surrounding portion 20 is folded approximately 180 ° to overlap is provided at the core leading end 21 of the pressure-bonding portion 16, and a curved surface portion 22 is provided as a surface of the folded portion 23, but this may not be the case. For example, the following terminal modes may be implemented: the bent-back portion 23 formed by folding back and overlapping the plate-like portion 20a at substantially 180 ° is not provided, but a curved portion is provided by forming a portion on the distal end side of the plate-like portion 20a constituting the core wire surrounding portion 20 to be curved in an arc shape at 180 ° or more.
Fig. 16 is a diagram showing a terminal 54 of a fourth modification, fig. 16 (a) is a perspective view showing a state before the terminal 54 of the fourth modification is connected to the core wire 4 of the cable 3, and fig. 16 (B) is a perspective view showing a state in which the terminal 54 of the fourth modification is connected to the core wire 4 of the cable 3 and the core wire 4 of the cable 3 is omitted from illustration. The terminal 54 shown in fig. 16 is configured similarly to the terminal 2 of the embodiment. However, the configuration of the curved portion 22d of the terminal 54 provided at the core wire leading end 21 of the pressure-bonding section 16 is different from that of the curved portion 22 provided at the core wire leading end 21 of the pressure-bonding section 16 of the terminal 2. In the following description of the terminal 54 according to the fourth modification, a description will be given of a structure of the curved surface portion 22d different from that of the above-described embodiment, and the same reference numerals are given to the same or corresponding structures as those of the above-described embodiment, and thus redundant description will be omitted.
In the pressure-bonding section 16 of the terminal 54, the plate-like portion 20a constituting the core surrounding section 20 does not have a state of being folded back at approximately 180 ° at the core leading end 21 so as to overlap, and a portion corresponding to the folded-back portion 23 in the pressure-bonding section 16 of the terminal 2 is not provided. In the core leading end portion 21 of the crimp portion 16 of the terminal 54, a portion on the distal end side in the longitudinal direction L of the plate-like portion 20a constituting the core surrounding portion 20 is formed so as to be curved in an arc shape of 180 ° or more from the inside to the outside of the core surrounding portion 20. Therefore, at the edge of the core wire leading end 21 of the pressure-bonding section 16 of the terminal 54, a circular tube-shaped portion 60 is provided in which the distal end side portion in the longitudinal direction L of the plate-shaped portion 20a is curved in an arc shape by 180 ° or more. Further, a curved surface portion 22d is provided in a circular tube-shaped portion 60 formed at the core wire leading end portion 21 of the pressure-bonding section 16 of the terminal 54. The curved surface portion 22d is provided as a surface of a circular tubular portion 60 provided by forming the plate-like portion 20a to be curved in an arc shape at 180 ° or more from the inside to the outside of the core wire surrounding portion 20, and the curved surface portion 22d is provided as a portion of a curved surface extending in an arc shape from the inside to the outside of the core wire surrounding portion 20.
As described above, the terminal 54 having the curved surface portion 22d may be implemented such that the curved surface portion 22d is provided as the surface of the circular tubular portion 60, and the circular tubular portion 60 is provided by forming the plate-like portion 20a in the core wire leading end portion 21 of the pressure-bonding section 16 to be curved in an arc shape of 180 ° or more from the inside to the outside of the core wire surrounding portion 20.
(5) In the above-described embodiment, the description has been given taking as an example the case where the plate-like portion 20a constituting the core wire surrounding portion 20 at the core wire lead-out end portion 21 of the pressure-bonding section 16 is provided with the folded-back portion 23 by folding back, and the curved surface portion 22 is provided as the surface of the folded-back portion 23, but this may not be the case. For example, the following terminal modes may be implemented: the folded-back portion 23 is not provided at the core wire surrounding portion 20, and the crimping portion 16 has an edge member fixed to the core wire surrounding portion 20, at which a curved surface portion is provided.
Fig. 17 is a diagram showing a terminal 55 according to a fifth modification, fig. 17 (a) and 17 (B) are perspective views showing a state before the terminal 55 according to the fifth modification is connected to the core wire 4 of the cable 3, and fig. 17 (C) is a perspective view showing a state in which the terminal 55 according to the fifth modification is connected to the core wire 4 of the cable 3 and the core wire 4 of the cable 3 is omitted from illustration. The terminal 55 shown in fig. 17 is configured similarly to the terminal 2 of the embodiment. However, the configuration of the curved surface portion 22e of the terminal 55 provided at the core wire leading end 21 of the pressure-bonding section 16 is different from that of the curved surface portion 22 provided at the core wire leading end 21 of the pressure-bonding section 16 of the terminal 2. In the following description of the terminal 55 according to the fifth modification, a description will be given of a configuration of the curved surface portion 22e different from that of the above-described embodiment, and the same reference numerals are given to the same or corresponding configurations as those of the above-described embodiment, and thus redundant description will be omitted.
The pressure-bonding section 16 of the terminal 55 has an edge member 61 fixed to an edge of the core surrounding section 20 on the core leading end 21 side. Fig. 17 (a) shows a state in which the edge member 61 is not fixed to the edge portion of the core surrounding portion 20, and fig. 17 (B) shows a state in which the edge member 61 is fixed to the edge portion of the core surrounding portion 20. The edge member 61 is provided as a member having an elongated shape extending along an edge portion of the distal end side in the longitudinal direction L of the core wire surrounding portion 20. The edge member 61 is fixed to an edge portion on the distal end side in the longitudinal direction L of the core wire surrounding portion 20 by, for example, welding. Further, a curved portion 22e extending in a semicircular shape from the inside to the outside of the core wire surrounding portion 20 in a state where the edge member 61 is fixed to the core wire surrounding portion 20 is provided at an end portion of the edge member 61 on the side opposite to the side fixed to the edge portion of the core wire surrounding portion 20. The curved surface portion 22e is provided to extend along the edge portion of the core wire surrounding portion 20 in a state where the edge member 61 is fixed to the core wire surrounding portion 20.
As described above, the following terminal 55 may be implemented: the pressure-bonding section 16 has an edge member 61 fixed to an edge portion of the core surrounding section 20 on the core leading end 21 side, and a curved portion 22e is provided on the edge member 61.
(6) In the above-described embodiment, the case where the connection object to which the cable 3 is connected via the terminal 2 is the substrate 100 has been described as an example, but this need not be the case. That is, the connection object to which the cable 3 is connected via the terminal may be a system other than the substrate 100. For example, a backlight for a liquid crystal display device may be used as a connection object other than the substrate 100 to which the cable 3 is connected via a terminal.
Fig. 18 is a diagram showing a terminal 56 of a sixth modification, in which fig. 18 (a) is a side view showing a state in which the terminal 56 of the sixth modification is connected to the core wire 4 of the cable 3 and to the backlight 102 for the liquid crystal display device, and fig. 18 (B) is a front view showing a state in which the terminal 56 of the sixth modification is connected to the core wire 4 of the cable 3 and is not connected to the backlight 102 for the liquid crystal display device. The terminal 56 shown in fig. 18 is configured similarly to the terminal 2 of the embodiment. However, the connection portion 62 of the terminal 56 has a different structure from the connection portion 15 of the terminal 2, and the connection portion 62 is connected to a connection object to which the cable 3 is connected via the terminal 56. In the following description of the terminal 56 of the sixth modification, a description will be given of a structure of the connecting portion 62 different from that of the above-described embodiment, and the same reference numerals are given to the same or corresponding structures as those of the above-described embodiment, and thus redundant description will be omitted.
The connection object to which the cable 3 is connected via the terminal 56 is configured as a backlight 102 for a liquid crystal display device. The backlight 102 has a light source tube 102a and a two-meter wire 102b for energizing an electrode built in the light source tube 102 a. The connection portion 62 of the terminal 56 is configured to be connected to the backlight 102 at a two-meter line 102 b. The connection part 62 is formed in an annular shape having a through hole 63 through which the two-meter wire 102b is inserted, and is integrally connected to the pressure-bonding part 16. The connection portion 62 of the terminal 56 is soldered in a state where the portion of the two-meter wire 102b protruding from the light source tube 102a is inserted into the insertion hole 63, whereby the connection portion 62 and the two-meter wire 102b are connected. Fig. 18 (a) shows a state in which the solder part formed by soldering between the connection part 62 and the two-meter wire 102b and connecting the connection part 62 and the two-meter wire 102b is omitted from the drawing.
As described above, the connection object to which the cable 3 is connected via the terminal may be an object other than the substrate 100. For example, the backlight 102 for the liquid crystal display device may be used as a connection object other than the substrate 100 to which the cable 3 is connected via the terminal 56.
(7) In the above-described embodiment, the method of connecting the terminal 2 and the cable 3 has been described by taking as an example the case where the separation step S105 is performed after the bending step S104 and before the core wire arrangement step S106, and the terminal 2 in a state before the core wires 4 of the cable 3 are connected is separated from the carrier 8, but this may not be the case. That is, the separation step S105 of separating the terminal 2 from the carrier 8 may be configured as a step of separating the terminal 2 connected to the core wire 4 of the cable 3 from the carrier 8.
In the separation step S105, when the terminal 2 connected to the core wire 4 of the cable 3 is separated from the carrier 8, the core wire arrangement step S106 is performed after the bending step S104, and then the connection portion forming step S107 and the pressure bonding step S108 are performed, and then the separation step S105 is performed. In this case, in the core wire arranging step S106, the core wires 4 are arranged with respect to the terminals 2 connected to the carrier 8. In the connection portion forming step S107, the connection portion 15 is formed in the terminal 2 connected to the carrier 8, and in the crimping step S108, the crimping portion 16 is crimped to the core wire 4 in the terminal 2 connected to the carrier 8. Thereby, the core wires 4 of the distal end portion of the cable 3 are pressure-contacted with respect to the terminal 2 at the pressure-contacting portion 16 in a state where the terminal 2 is joined to the carrier 8 at the end of the connecting portion 15.
After the pressure bonding step S108 is completed, the separation step S105 is performed. In the cutting step S105, the terminals 2 connected to the core wires 4 of the cable 3 are cut from the carrier 8. That is, the connection portion between the end portion of the terminal 2 connected with the core wire 4 of the cable 3 on the connection portion 15 side and the carrier 8 is cut and separated. Then, the separation step S105 is completed, and the method of connecting the terminal 2 and the cable 3 is thereby completed.
As described above, the following method of connecting the terminal 2 and the cable 3 may be implemented: the separation step S105 of separating the terminal 2 from the carrier 8 is configured as a step of separating the terminal 2 connected to the core wire 4 of the cable 3 from the carrier 8.
(8) In the above-described embodiment, the method of connecting the terminal 2 and the cable 3 has been described by way of example in which the folding-back step S102 is performed after the entire shape of the blank 2A of the terminal 2 is punched out after the punching step S101 is completed. For example, a punching step of punching out the blank 2A of the terminal 2 from a plate-shaped metal member may be performed before and after the folding-back step S102.
Fig. 19 is a flowchart for explaining a method of connecting the terminal 2 and the cable 3 according to the modification. The method of connecting the terminal 2 and the cable 3 according to the modification shown in fig. 19 is the same as the method of connecting the terminal 2 and the cable 3 according to the embodiment. However, the structure of the punching step (S101A, S101B) in the method of connecting the terminal 2 and the cable 3 according to the modification is different from the structure of the punching step S101 in the method of connecting the terminal 2 and the cable 3 according to the embodiment. In the following description of the method of connecting the terminal 2 and the cable 3 according to the modification, the structure of the punching step (S101A, S101B) different from that of the above-described embodiment is described, and the same reference numerals are given to the same structure or corresponding structures as those of the above-described embodiment, and thus, redundant description is omitted.
The method of connecting the terminal 2 and the cable 3 according to the modification includes a first punching step S101A and a second punching step S101B as punching steps (S101A, S101B) for punching the blank 2A of the terminal 2 from the plate-shaped metal member. The first blanking step S101A and the second blanking step S101B are performed before and after the folding back step S101. That is, first, the first punching step S101A is performed, the folding back step S102 is performed when the first punching step S101A is completed, and the second punching step S101B is performed when the folding back step S102 is completed.
The first punching step S101A is configured as a step of: the crimping portion blank portion 16A in the blank 2A of the terminal 2 is punched out of a plate-like metal using a press die configured as a die. Alternatively, the first punching step S101A is configured as a step of: a step of punching out the press-bonding blank portion 16A and the connecting portion blank portion 17A in the blank 2A of the terminal 2 from the plate-like metal member using a press die configured as a die. In the first blanking process S101A, the crimping blank portion 16A in the blank 2A of the terminal 2 is formed in a state of being aligned along the carrier 8. Alternatively, in the first punching step S101A, the pressing blank portion 16A and the connecting blank portion 17A are integrally formed in the blank 2A of the terminal 2 so as to be aligned along the carrier 8.
After the first punching step S101A ends, the folding back step S102 is performed. In the fold-back process S102, the edge portion on the distal end portion side of the pressure bonding blank portion 16A formed in the first blanking process S101A is bent in a folded-back manner, forming the core wire drawing end portion 21 provided with the curved surface portion 22.
When the folding-back step S102 is completed, a second punching step S101B is performed. The second punching step S101B is configured as a step of: the connection portion blank portion 17A and the connection portion blank portion 15A in the blank 2A of the terminal 2 are punched out of a plate-shaped metal using a press die configured as a die. Alternatively, the second punching step S101B is configured as a step of: the connecting portion blank portion 15A in the blank 2A of the terminal 2 is punched out of a plate-like metal member using a press die configured as a die. Further, in the case where only the pressure-bonding part blank portion 16A is punched out in the first punching step S101A, the connecting part blank portion 17A and the connecting part blank portion 15A are punched out in the second punching step S101B. On the other hand, in the case where the pressure contact blank portion 16A and the connecting portion blank portion 17A are punched out in the first punching step S101A, only the connecting portion blank portion 15A is punched out in the second punching step S101B.
When the second punching step S101B is performed, the punching of the blank 2A of the terminal 2 having the pressure-bonding part blank portion 16A, the connecting part blank portion 17A, and the connecting part blank portion 15A is completed. The blank 2A of the terminal 2 formed after the second punching step S101B is connected to the carrier 8 at the connecting portion blank portion 15A and formed in a state of being aligned along the carrier 8. Further, in the blank 2A of the terminal 2 formed after the second punching step S101B is completed, the core wire leading end portion 21 provided with the curved surface portion 22 is formed at the edge portion on the distal end side of the pressure-bonding section blank portion 16A.
After the second punching step S101B is completed, a cutting and raising step S103, a bending step S104, a separating step S105, a core wire arranging step S106, a connecting portion forming step S107, and a pressure bonding step S108 are performed. Thereby, the method of connecting the terminal 2 and the cable 3 of the modification is completed.
As described above, the punching step (S101A, S101B) of punching the blank 2A of the terminal 2 may be performed before and after the folding-back step S102. That is, the following embodiment may be implemented: as the punching steps (S101A, S101B), a first punching step S101A and a second punching step S101B are performed, the first punching step S101A being performed before the folding-back step S102 to punch out at least the pressure-bonding section blank portion 16A, and the second punching step S101B being performed after the folding-back step S102 to punch out at least the connecting section blank portion 15A, thereby completing the overall shape of the blank 2A of the terminal 2. According to this aspect, in the folding-back step S102, the edge portion of the pressure-bonding section blank portion 16A can be folded back to form the core wire lead-out end portion 21 in a state where only the pressure-bonding section blank portion 16A is formed in the plate-shaped metal or in a state where only the pressure-bonding section blank portion 16A and the connecting section blank portion 17A are formed in the plate-shaped metal. Therefore, the folding-back step S102 of folding back the edge portion of the pressure-bonding section blank portion 16A to form the core wire lead-out end portion 21 can be performed in a more stable state. This can further improve the productivity of the folding-back step S102.
[ industrial applicability ]
The present invention is widely applicable to a terminal connected to a core wire at a terminal portion of a cable and a method of connecting the terminal to the cable.

Claims (7)

1. A terminal connected to a core wire of a terminal portion of a cable, comprising:
a connection unit that is connected to an object to be connected to which the cable is connected via the terminal; and
a crimping portion integrally coupled with the connection portion and crimped to the core wire,
the crimping portion has a core wire surrounding portion provided to surround an outer periphery of the core wire in a circumferential direction,
in the pressure-bonding section, a curved portion extending in an arc shape from the inside to the outside of the core wire surrounding section is provided along an edge of the core wire surrounding section at a core wire leading end section, the core wire leading end section being an end section on the opposite side of a side of the pressure-bonding section integrally connected to the connection section, and the end section being a side from which the core wire in a state of being pressure-bonded to the pressure-bonding section is led and extended.
2. A terminal as claimed in claim 1,
the curved surface portion is provided as a surface of a folded-back portion formed by providing a plate-like portion constituting the core wire surrounding portion in a state of being folded back and overlapped at the core wire lead-out end portion, and is provided to extend in a semicircular shape from an inner side to an outer side of the core wire surrounding portion.
3. A terminal as claimed in claim 2,
the curved surface portion is provided as a surface of a folded-back portion formed by arranging the plate-like portion in a state where the plate-like portion is folded back and overlapped from an inner side toward an outer side of the core wire surrounding portion at the core wire lead-out end portion.
4. A terminal according to any one of claims 1 to 3,
the object to be connected is a substrate,
the connection portion is provided in a cylindrical shape covering the core wire from the outside, and is configured to be soldered to the substrate in a state of being inserted through a through hole provided in the substrate.
5. A method of connecting a terminal to a cable, comprising connecting the terminal according to any one of claims 1 to 3 to a cable,
the method for connecting the terminal and the cable comprises the following steps:
a blanking step of blanking a blank of the terminal from a plate-shaped metal member;
a folding back step of forming the core wire lead-out end provided with the curved surface portion by bending an edge portion of a pressure-bonding section blank portion as a blank portion of the pressure-bonding section so as to fold back;
a core wire arranging step of arranging the core wires of the terminal portion of the cable to the crimping section formed by bending the crimping section blank portion and in a state before crimping the core wires; and
and a crimping step of clamping and pressing the crimping section, on which the core wire is arranged, by a die for crimping section having an upper tooth die and a lower tooth die, thereby bringing the core wire into a state of being crimped at the crimping section.
6. The method of claim 5, wherein the cable is a wire cable,
the mold for crimping part has: a first tooth mold portion that sandwiches and presses the core wire surrounding portion; and a second tooth mold portion that sandwiches and presses the core wire lead-out end portion.
7. The method of claim 6, wherein the cable is a wire,
the first and second tooth mold portions are provided separately from each other,
in the pressure bonding step, the first tooth mold portion and the second tooth mold portion are used in a state of being overlapped.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116979340A (en) * 2023-08-03 2023-10-31 广州煜立光电科技有限公司 Manufacturing method of electric connection terminal and electric connection terminal manufactured by same

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1331928A (en) * 1916-12-04 1920-02-24 Gen Electric Connector
US3892459A (en) * 1974-06-21 1975-07-01 Amp Inc Open barrel terminal and method for terminating an electrical wire therein
JPS5727668U (en) * 1981-03-12 1982-02-13
US4531807A (en) * 1981-06-11 1985-07-30 L'electricfil Industrie Bent terminal for electrical connection
CN106711624A (en) * 2017-03-08 2017-05-24 国网河南省电力公司漯河供电公司 Improved 2M connector and manufacturing method thereof
CN109075460A (en) * 2016-03-04 2018-12-21 株式会社德尔塔普乐士 It crimps connection terminal and crimps the manufacturing method of connection terminal
CN110518433A (en) * 2018-05-21 2019-11-29 矢崎总业株式会社 The manufacturing method of electric wire with terminal and the electric wire with terminal
CN110635292A (en) * 2018-06-21 2019-12-31 矢崎总业株式会社 Connector with a locking member
CN111799574A (en) * 2019-04-03 2020-10-20 矢崎总业株式会社 Terminal-equipped electric wire and terminal crimping device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280991B (en) 1993-08-10 1997-06-18 Huang Mu Shui Insulated wire terminal
JP2000235875A (en) 1999-02-16 2000-08-29 Yukita Densen Kk Electrical terminal
JP2010097781A (en) 2008-10-15 2010-04-30 Autonetworks Technologies Ltd Manufacturing method of electric wire with terminal fitting, and terminal crimping device
JP2014160606A (en) 2013-02-20 2014-09-04 Furukawa Electric Co Ltd:The Crimp terminal, wire with crimp terminal and wire harness

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1331928A (en) * 1916-12-04 1920-02-24 Gen Electric Connector
US3892459A (en) * 1974-06-21 1975-07-01 Amp Inc Open barrel terminal and method for terminating an electrical wire therein
JPS5727668U (en) * 1981-03-12 1982-02-13
US4531807A (en) * 1981-06-11 1985-07-30 L'electricfil Industrie Bent terminal for electrical connection
CN109075460A (en) * 2016-03-04 2018-12-21 株式会社德尔塔普乐士 It crimps connection terminal and crimps the manufacturing method of connection terminal
CN106711624A (en) * 2017-03-08 2017-05-24 国网河南省电力公司漯河供电公司 Improved 2M connector and manufacturing method thereof
CN110518433A (en) * 2018-05-21 2019-11-29 矢崎总业株式会社 The manufacturing method of electric wire with terminal and the electric wire with terminal
CN110635292A (en) * 2018-06-21 2019-12-31 矢崎总业株式会社 Connector with a locking member
CN111799574A (en) * 2019-04-03 2020-10-20 矢崎总业株式会社 Terminal-equipped electric wire and terminal crimping device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116979340A (en) * 2023-08-03 2023-10-31 广州煜立光电科技有限公司 Manufacturing method of electric connection terminal and electric connection terminal manufactured by same

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