WO2024024769A1 - Raccord métallique de borne - Google Patents

Raccord métallique de borne Download PDF

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Publication number
WO2024024769A1
WO2024024769A1 PCT/JP2023/027127 JP2023027127W WO2024024769A1 WO 2024024769 A1 WO2024024769 A1 WO 2024024769A1 JP 2023027127 W JP2023027127 W JP 2023027127W WO 2024024769 A1 WO2024024769 A1 WO 2024024769A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductor
crimp
base
pair
extra length
Prior art date
Application number
PCT/JP2023/027127
Other languages
English (en)
Japanese (ja)
Inventor
雄之 鈴木
藍 平野
Original Assignee
住友電装株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 住友電装株式会社 filed Critical 住友電装株式会社
Publication of WO2024024769A1 publication Critical patent/WO2024024769A1/fr

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Classifications

    • 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

Definitions

  • the present disclosure relates to a terminal fitting.
  • the terminal fitting (crimping terminal) disclosed in Patent Document 1 includes a bottom portion and a pair of crimping portions that protrude from the bottom portion in opposite directions in an expanded state. Each crimping part is bent by crimping, and the conductor of the electric wire is crimped between it and the bottom part. Each crimp portion has abutting ends that abut each other at the tips in the protruding direction. The conductor of the wire has a cross-sectional shape that fills the entire space between each crimp and the bottom.
  • an object of the present disclosure is to provide a terminal fitting that can suppress an increase in contact resistance after thermal heating at a contact portion with a conductor.
  • the terminal fitting of the present disclosure includes a base and a pair of crimp parts protruding from the base, the pair of crimp parts and the base have a shape surrounding the outer periphery of a conductor of an electric wire, and the pair of crimp parts
  • the portions are in electrical contact with the conductor in a state where they are butted against each other on the outer periphery of the conductor, and the tips of the pair of crimp portions in the protruding direction are on the inner peripheral surfaces of each of the pair of crimp portions and the base portion.
  • a circumferential length therebetween is set to be longer than an outer circumferential length of the conductor surrounded by the pair of crimp parts and the base.
  • FIG. 1 is a perspective view showing a terminal fitting and an electric wire according to Embodiment 1 of the present disclosure.
  • FIG. 2 is a sectional view showing a first structure in which each crimping part and the base surround the outer periphery of a conductor of an electric wire and are crimped to the conductor.
  • FIG. 3 is a cross-sectional view showing a second structure in which each crimping part and the base surround the outer periphery of the conductor of the electric wire and are crimped to the conductor.
  • FIG. 4 is a cross-sectional view showing a third structure in which each crimping part and the base surround the outer periphery of the conductor of the electric wire and are crimped to the conductor.
  • FIG. 5 is a sectional view of each crimping part and the base before crimping processing.
  • FIG. 6 is a diagram corresponding to FIG. 2 of each crimping part and the base crimped by the crimping machine.
  • the terminal fitting of the present disclosure includes: (1) A base and a pair of crimping parts protruding from the base, the pair of crimping parts and the base having a shape surrounding the outer periphery of a conductor of an electric wire, and the pair of crimping parts
  • the circumferential length between the tips of the pair of crimp parts in the protruding direction on the inner peripheral surface of each of the pair of crimp parts and the base, which are in electrical contact with the conductor in a state where they are butted against each other on the outer circumference of the conductor; is set to be longer than the outer circumference of the conductor surrounded by the pair of crimp parts and the base.
  • Each of the pair of crimp portions includes an outer circumferential portion extending from the base and including a contact surface as the abutted surface, an extra length portion continuous from the outer circumferential portion, and a portion between the outer circumferential portion and the conductor. It is preferable to have a space formed between the outer periphery and the space for allowing the extra length to escape. According to the above configuration, since the outer peripheral part includes the contact surface and the extra length part continues from the outer peripheral part, it is possible to ensure that the respective crimping parts are butted against each other. Furthermore, since the extra length is allowed to escape into the space formed between the outer circumferential portion and the outer periphery of the conductor, the appearance of each crimp portion can be maintained.
  • the outer peripheral portion preferably has a crimping surface that extends continuously from the contact surface along the outer periphery of the conductor. According to the above configuration, the conductor can be stably held between the outer circumference and the base by contacting the crimping surface of the outer circumference along the outer circumference of the conductor.
  • the extra length portion may have a shape that is folded back toward the space portion from the end portion of the outer peripheral portion on the contact surface side. According to the above configuration, even if the extra length portion becomes long, it can be compactly accommodated in the space.
  • the terminal fitting 10 according to Embodiment 1 of the present disclosure is integrally formed by bending a conductive metal plate.
  • the terminal fitting 10 is crimped to the end portion of the electric wire 60.
  • the left side of FIG. 1 is taken as the front side in the front-back direction.
  • the horizontal direction is based on the horizontal direction of each figure except FIG. 1, and the vertical direction is based on the vertical direction of each figure.
  • the front-back direction is synonymous with the axial direction, and is indicated by the symbol X.
  • the left-right direction has the same meaning as the width direction, and is indicated by the symbol Y.
  • the vertical direction is synonymous with the height direction, and is indicated by the symbol Z.
  • the circumferential direction corresponds to the circumferential direction of the electric wire 60.
  • These direction standards are for convenience, and do not necessarily correspond to the directions when the connector (not shown) with the terminal fitting 10 assembled thereon is mounted on a vehicle or the like.
  • the electric wire 60 is a covered electric wire, and has an electrically conductive conductor 61 and an insulating coating 62 surrounding the outer periphery of the conductor 61, as shown in FIG.
  • the conductor 61 is a single wire or a twisted wire.
  • the conductor 61 is a single wire, and a copper-covered steel wire that is not plated with tin, silver, or the like is used.
  • the conductor 61 Before the crimping process, the conductor 61 has a perfect circular or nearly perfect circular cross-sectional shape (see FIG. 1), and after the crimping process, it receives compressive force from the vertical direction and corresponds to the wire connection part 12 described later.
  • the cross-sectional shape is an ellipse that is elongated in the left-right direction (see FIG. 2).
  • the conductor 61 may have a structure that does not deform under compressive force.
  • the terminal fitting 10 has a shape that extends in the front-rear direction as a whole.
  • the terminal fitting 10 has a mating connection part 11 at the front and a wire connection part 12 at the rear.
  • the counterpart connecting portion 11 includes a cylindrical connecting portion 13 and a pair of connecting pieces 14 extending forward from the connecting portion 13 and facing each other in the left-right direction.
  • Each connecting piece 14 is elastically deformable in the left-right direction using the connecting portion 13 as a fulcrum.
  • Each connection piece 14 is electrically connected to the mating terminal fitting by sandwiching a tab of the mating terminal fitting (not shown) therebetween.
  • the wire connection portion 12 has a base portion 15 and a pair of crimp portions 16 protruding from both left and right sides of the base portion 15.
  • the base portion 15 is a bottom plate portion continuous from the bottom surface of the connecting portion 13, and, as shown in FIG. 5, has a downwardly curved shape before crimping.
  • each crimping part 16 is in the form of a strip having a constant width in the front-rear direction, except for the part on the tip side in the protruding direction, and projects upward from both left and right sides of the base 15 before crimping processing. placed opposite each other.
  • Each crimp portion 16 has a constant thickness that is the same as the thickness of the base portion 15, except for the portion on the tip side in the protrusion direction. As shown in FIG. 5, the tip end portion of each crimping portion 16 in the protruding direction has a tapered chamfered slope portion 17 at the outer peripheral corner before crimping.
  • the inner circumferential surface of the wire connection portion 12 has a U-shaped cross section before crimping.
  • the inner circumferential length from the protruding tip of one crimp part 16 to the protruding tip of the other crimp part 16 via the base 15, that is, the circumferential length L1 of the inner circumferential surface of the wire connecting part 12 (Fig. 5) is set to be longer than the length that goes around the outer circumference of the conductor 61, that is, the outer circumference length L2 of the conductor 61 (see FIG. 2).
  • the circumferential length L1 of the inner circumferential surface of the wire connection portion 12 is greater than or equal to twice the outer circumferential length L2 of the conductor 61 and less than or equal to four times.
  • the electric wire connecting portion 12 can have specific structures shown below as a first structure, a second structure, and a third structure depending on the conditions of the crimping process. Note that the first structure, the second structure, and the third structure are all normal crimp structures, but they are merely examples, and do not limit the present disclosure.
  • the wire connecting portion 12 is crimped onto the conductor 61 by a crimping machine 80 equipped with an anvil 81 as a lower mold and a crimper 82 as an upper mold. Specifically, with the base 15 supported by the installation surface 83 of the anvil 81, each crimping part 16 contacts the descending crimper 82 and is deformed inward into an arc shape.
  • Each crimp portion 16 forms an outer peripheral portion 21 that surrounds the outer periphery of the conductor 61 placed on the base 15 in the arc-shaped deformed portion.
  • the outer circumferential parts 21 of each crimp part 16 are butted against each other at the tip end side in the direction of protrusion from the base part 15 to form a back-to-back contact surface 22.
  • the contact surfaces 22 of the outer periphery 21 of each crimp part 16 are in contact with each other along the vertical direction, and are arranged at positions corresponding to the left-right center of the outer periphery of the conductor 61 (the top 63 of the conductor 61) in the left-right direction. .
  • each crimp part 16 has a curved crimp surface 23 that is continuous with the contact surface 22 at a position corresponding to the top 63 of the conductor 61 and makes close contact along the outer periphery of the conductor 61. There is.
  • the crimping surface 23 of the outer periphery 21 of each crimping part 16 contacts the upper half of the outer periphery of the conductor 61 and holds the conductor 61 between it and the base 15 that contacts the lower half of the outer periphery of the conductor 61.
  • the contact area of the crimp surface 23 with the upper half of the outer periphery of the conductor 61 is larger than the contact area of the base 15 with the lower half of the outer periphery of the conductor 61.
  • each crimp portion 16 has an extra length portion 24 that extends continuously from the tip end side in the protruding direction of the outer peripheral portion 21 in the crimp state.
  • the extra length portion 24 of each crimp portion 16 is compressed and deformed between the crimper 82 and the conductor 61 by receiving a compressive force from above by the crimper 82 .
  • the conductor 61 has such hardness that it generates an extra length 24 against the compressive force of the crimper 82.
  • the extra length portions 24 of each crimp portion 16 are bent in opposite directions from the tip end side in the protruding direction of the outer circumferential portion 21 and are arranged so as to overlap the outer circumferential portion 21 from the inside.
  • each crimp portion 16 do not come into contact with the conductor 61, but are allowed to escape into the space portions 25 formed on both left and right sides inside the wire connection portion 12.
  • the extra length portion 24 of each crimp portion 16 is allowed to escape into the space 25, so that it does not appear on the external appearance of each crimp portion 16.
  • the appearance of each crimp portion 16 can be a shape in which two curved surfaces are continuous through the upper end of the contact surface 22.
  • the extra length portion 24 of each crimp portion 16 has a thickness defined between an inner circumferential surface 26 that is continuous with the crimp surface 23 and an outer circumferential surface 27 that contacts or approaches the outer circumferential portion 21 in the space portion 25 . is increasing toward both the left and right sides.
  • each crimp portion 16 has a shape that is line symmetrical with respect to an up-down axis (an axis along the contact surface 22) passing through the left and right center portions of the conductor 61.
  • the second structure also has a base 15, an outer circumference 21, an extra length 24, and a space 25, like the first structure.
  • the second structure has a smaller height than the first structure and a larger width than the first structure.
  • each crimp portion 16 has a shape that is asymmetrical with respect to the vertical axis passing through the left and right center portions of the conductor 61, so that the left side extra length portion 24A in FIG. 3 is lower than the right side extra length portion 24B. Shifting to the side.
  • the crimp surfaces 23 of the left outer circumferential portion 21A and the right outer circumferential portion 21B are in total contact with the outer circumference of the conductor 61 in a range exceeding half of the outer circumference.
  • the third structure also has a base 15, an outer peripheral part 21, an extra length part 24, and a space part 25, like the first structure.
  • the third structure has a smaller height than the first structure and a larger width than the first structure.
  • each crimp portion 16 has an asymmetrical shape with respect to the vertical axis passing through the left and right center portions of the conductor 61, and the left side extra length 24A in FIG. 4 is smaller than the right side extra length 24B. ing.
  • the left extra length portion 24A is different from the extra length portion 24 of the first structure in that it is not folded back from the outer circumferential portion 21, but is integrated with the inner circumference of the outer circumferential portion 21.
  • the circumferential length L1 of the inner circumferential surface of the electric wire connecting portion 12 is set longer than the outer circumferential length L2 of the conductor 61.
  • Each crimp portion 16 has a contact surface 22 on the tip end side in the protruding direction of the outer circumferential portion 21 , and further has a remaining portion that continues from the contact surface 22 and protrudes into a space 25 formed inside the outer circumferential portion 21 . It has a long part 24. Therefore, the contact surfaces 22 of the outer peripheral portions 21 of the respective crimp portions 16 can be in contact with each other for a long time along the vertical direction, and can maintain the contact state. Therefore, the configuration in which each crimping part 16 crimps the conductor 61 is maintained, and as a result, an increase in contact resistance at the contact portion between each crimping part 16 and the conductor 61 can be suppressed.
  • the extra length portion 24 is allowed to escape into the space 25 formed between the outer peripheral portion 21 and the outer periphery of the conductor 61, poor appearance of the crimp portion 16 can be prevented.
  • the outer circumferential portion 21 has a crimp surface 23 that extends continuously from the contact surface 22 along the outer circumference of the conductor 61, the conductor 61 can be stably held between the outer circumferential portion 21 and the base 15. Can be done.
  • the extra length part 24 since the extra length part 24 has a shape that is folded back from the end of the outer peripheral part 21 on the contact surface 22 side to the space part 25 side, the long extra length part 24 can be compactly stored in the space 25.
  • Embodiment 1 disclosed herein above should be considered to be illustrative in all respects and not restrictive.
  • the mating connection portion had a pair of elastically deformable connecting pieces exposed to the outside.
  • the mating connection part may have a structure including one elastically deformable contact piece inside a cylindrical box part.
  • the counterpart connection portion may have a structure in which a connection hole is passed through a flat plate (LA terminal).
  • the mating connection portion may have a structure in which a tab protrudes forward (male terminal).
  • the conductor of the covered wire was electrically and mechanically connected to the wire connection portion.
  • the conductor of the covered wire is electrically connected to a wire barrel as a wire connection part, and the sheath of the covered wire is mechanically connected to an insulation barrel. Also good.
  • a space gap was formed inside the wire connection section.
  • a structure may be adopted in which the extra length portion fills the entire space, so that no gap is formed inside the wire connection portion.
  • the inner circumferential surface of the wire connection portion was formed flat without any unevenness.
  • serrations may be formed on the inner circumferential surface of the wire connection portion.
  • the conductor of the electric wire was formed to have a circular cross section (including an elliptical shape).
  • the conductor of the electric wire may have a polygonal or irregular cross-sectional shape.
  • the outer circumferential length of the conductor is defined by the creepage length along the shape that repeats the unevenness.
  • SYMBOLS 10 Terminal fitting 11... Mating connection part 12... Wire connection part 13... Connection part 14... Connection piece 15... Base 16... Crimp part 17... Slope part 21... Outer circumference part 21A... Left outer circumference part 21B... Right outer circumference part 22... Contact surface 23...Crimping surface 24...Extra length part 24A...Left side extra length part 24B...Right side extra length part 25...Space 26...Inner peripheral surface (of the extra length part) 27...Outer peripheral surface (of the extra length part) 60...

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

L'invention concerne un raccord métallique de borne (10) qui comprend une partie de base (15) et une paire de parties d'ajustement par pression (16) qui font saillie à partir de la partie de base (15). Les parties d'ajustement par pression (16) et la partie de base (15) sont formées de manière à entourer une circonférence externe d'un conducteur (61) d'un fil électrique (60). Les parties d'ajustement par pression (16) sont en contact électrique avec le conducteur (61) dans un état de butée l'un contre l'autre sur la circonférence externe du conducteur (61). Une longueur circonférentielle (L1) entre les pointes des parties d'ajustement par pression (16) dans la direction de saillie de celles-ci au niveau des surfaces circonférentielles internes des parties d'ajustement par pression (16) et la partie de base (15) est réglée pour être supérieure à une longueur circonférentielle externe (L2) du conducteur (61) qui est entourée par les parties d'ajustement par pression (16) et la partie de base (15).
PCT/JP2023/027127 2022-07-27 2023-07-25 Raccord métallique de borne WO2024024769A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022119295A JP2024016973A (ja) 2022-07-27 2022-07-27 端子金具
JP2022-119295 2022-07-27

Publications (1)

Publication Number Publication Date
WO2024024769A1 true WO2024024769A1 (fr) 2024-02-01

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PCT/JP2023/027127 WO2024024769A1 (fr) 2022-07-27 2023-07-25 Raccord métallique de borne

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JP (1) JP2024016973A (fr)
WO (1) WO2024024769A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009054483A (ja) * 2007-08-28 2009-03-12 Auto Network Gijutsu Kenkyusho:Kk 端子圧着構造およびこの端子圧着構造を備えたシールドコネクタ
JP2019204653A (ja) * 2018-05-23 2019-11-28 株式会社オートネットワーク技術研究所 端子付き電線

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009054483A (ja) * 2007-08-28 2009-03-12 Auto Network Gijutsu Kenkyusho:Kk 端子圧着構造およびこの端子圧着構造を備えたシールドコネクタ
JP2019204653A (ja) * 2018-05-23 2019-11-28 株式会社オートネットワーク技術研究所 端子付き電線

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Publication number Publication date
JP2024016973A (ja) 2024-02-08

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