JP2012134096A - Terminal fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal fitting which is connected to a plurality of types of electric wire each having different thickness, with proper holding force.SOLUTION: A terminal fitting 10 includes: a support part 11 which supports a terminal part of electric wire 60; and a plurality of barrel pieces 18 which project from both side edges of the support part 11 and are crimped by being wound around sheath 62 at the terminal part of the electric wire 60. The plurality of the barrel pieces 18 include: a short piece 21 which projects from one side edge out of the both side edges of the support part 11 with the small projecting amount; and a long piece 22 which is arranged parallel to this short piece 21 and projects from the other side edge with the large projecting amount.

Description

  The present invention relates to a terminal fitting.

  Patent Document 1 discloses a conventional terminal fitting. This is integrally formed by bending a conductive metal plate or the like, and includes a support part for supporting the terminal part of the electric wire and a plurality of barrel pieces protruding from both side edges of the support part. Each barrel piece is wound and crimped around the coating at the end of the electric wire, and a pair of front barrel pieces located on the front side near the core wire of the electric wire and a pair of rear pieces located on the rear side near the end of the support portion It consists of a side barrel piece. The ends of the barrel pieces facing each other with the support portion interposed therebetween are wrapped with each other in a state of being wound around the covering.

JP 2009-152111 A

  By the way, when the said conventional terminal metal fitting respond | corresponds to the multiple types of electric wire from which thickness differs, if the diameter of the coating | cover of an electric wire becomes thick, the crimping | compression margin of the barrel piece in coating | cover will reduce. On the other hand, when the diameter of the wire covering is reduced, the wrapping amount of the barrel piece is increased, and the winding form of the barrel piece is distorted, and the crimping allowance of the barrel piece may be reduced as described above. For this reason, the holding force of the terminal fitting is weakened, and the electric wire may be detached from the terminal fitting.

  This invention was completed based on the above situations, Comprising: It aims at providing the terminal metal fitting connected with the appropriate holding force with respect to the multiple types of electric wire which differs in thickness. .

  As means for achieving the above-mentioned object, the invention of claim 1 is formed of a conductive metal plate, supports a terminal portion of the electric wire, protrudes from both side edges of the supporting portion, and A terminal fitting comprising a plurality of barrel pieces that are wound around and crimped to a covering in a terminal portion, and the plurality of barrel pieces protrude from one side edge of the both side edges of the support portion with a small protrusion amount And a short piece that is arranged in parallel with the short piece and protrudes from the one side edge with a large protruding amount.

  According to a second aspect of the present invention, in the first aspect, the plurality of barrel pieces protrude from the other side edge of the both side edges of the support portion and are wound around the covering, It has the feature in having the protrusion piece arrange | positioned between the said long pieces.

  The invention of claim 3 is characterized in that, in the invention of claim 2, the long piece is formed at an end of the support portion.

<Invention of Claim 1>
When the diameter of the wire covering is large, the long piece is crimped with an appropriate crimping allowance for the wire covering. Further, when the diameter of the wire covering is thin, the short piece is crimped with a proper crimping allowance for the wire covering. Therefore, according to this embodiment, the terminal metal fitting connected with the appropriate holding force with respect to the multiple types of electric wires having different thicknesses is provided.

<Invention of Claim 2>
Since the protruding pieces are arranged between the short pieces and the long pieces in a state where each barrel piece is wound around the covering of the electric wire, it is avoided that the short pieces, the long pieces, and the protruding pieces wrap around each other. As a result, even if the thickness of the electric wire is changed, it is not necessary to consider the wrap amount of each barrel piece, and a stable holding force can be obtained.

<Invention of Claim 3>
Since the long piece is formed at the end of the support portion, it is easy to avoid interference between the long piece and the other side edge of the support portion even if the protruding amount of the long piece is large.

It is a principal part enlarged plan view of the terminal metal fitting concerning Embodiment 1 of the present invention. It is a right view of a terminal metal fitting. It is a left view of a terminal metal fitting. It is an expanded view of a terminal metal fitting.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. The terminal fitting 10 according to the first embodiment is integrally formed by bending or the like after punching a conductive metal plate into a developed shape shown in FIG. 4, and has an elongated shape in the front-rear direction as a whole.

  A bottom portion of the terminal fitting 10 is a support portion 11 that supports the electric wire 60. The support portion 11 is formed over the entire length of the terminal fitting 10. A terminal body 12 is formed at the front end portion of the terminal fitting 10, and an insulation barrel portion 13 is formed at the rear end portion of the terminal fitting 10, and an intermediate portion of the terminal fitting 10, that is, the insulation barrel portion 13 and the terminal. A wire barrel portion 14 is formed between the main body 12 and the body 12. As shown in FIGS. 2 and 3, the support portion 11 on the wire barrel portion 14 and the insulation barrel portion 13 side is disposed at a position one step lower than the support portion 11 on the terminal body 12 side.

  The terminal body 12 has a substantially rectangular tube shape, more specifically, a rectangular tube shape, and in a developed shape, a plurality of portions protruding in the width direction from both side edges (both side edges in the width direction orthogonal to the front-rear direction) of the support portion 11 are bent. Formed by. A substantially rectangular lance hole 15 is formed in the support portion 11 of the terminal body 12 so as to open. A lance of a connector housing (not shown) is elastically fitted into the lance hole 15. By fitting the lance into the lance hole 15 of the support portion 11, the terminal fitting 10 is prevented from coming off in the connector housing.

  An elastic contact piece 16 is disposed inside the terminal body 12. The elastic contact piece 16 is formed by folding back a portion protruding forward from the front end of the terminal body 12 in a deployed shape, and a contact portion (not shown) is formed on the top. Along with the connector fitting, a male tab of a mating terminal fitting (not shown) is inserted into the terminal body 12, the inserted male tab comes into elastic contact with the contact portion of the elastic contact piece 16, and both terminal fittings are electrically To be connected to.

  The wire barrel portion 14 has a pair of wire barrel pieces 17 protruding from both side edges of the support portion 11. Both the wire barrel pieces 17 have a plate shape elongated in the front-rear direction, and are wound around the core wire 61 exposed at the end portion of the electric wire 60 from the width direction and are crimped. In this case, the tips of the two wire barrel pieces 17 are arranged so as to face each other at the substantially central portion in the width direction of the core wire 61.

  The insulation barrel portion 13 has a plurality of barrel pieces 18 protruding from both side edges of the support portion 11. Each barrel piece 18 is wound and crimped around the covering 62 at the end of the electric wire 60 from the width direction.

  Specifically, each barrel piece 18 includes a short piece 21 protruding from one side edge (hereinafter referred to as a first side edge 19) of both side edges of the support portion 11 with a relatively small protrusion amount, and a rear side of the short piece 21. And a long piece 22 projecting from the first side edge 19 with a relatively large projecting amount. The long piece 22 is formed at the rear end portion of the support portion 11 and is located at the rearmost end in the entire terminal fitting 10.

  The short piece 21 has a smaller amount of protrusion from the first side edge 19 than the long piece 22, and the length dimension in the front-rear direction (front-rear length) is larger than that of the long piece 22. The short piece 21 has a larger protruding amount from the first side edge 19 than the wire barrel piece 17.

  The long piece 22 has a protruding end outward in the width direction from the short piece 21 in the developed shape, and is configured to gradually narrow the longitudinal length toward the protruding end. The rear end of the long piece 22 is cut out along the circumferential direction. Between the short piece 21 and the long piece 22, a substantially V-shaped or substantially U-shaped groove portion 23 is formed in the developed shape. The groove portion 23 is formed by notching the first side edge 19 of the support portion 11 greatly, and the bottom portion is located inward of the support portion 11.

  Each barrel piece 18 has a projecting piece 24 protruding from the other side edge (hereinafter referred to as the second side edge 20) of both side edges of the support portion 11. The protruding amount of the protruding piece 24 from the second side edge 20 is larger than the protruding amount of the short piece 21 from the first side edge 19, and smaller than the protruding amount of the long piece 22 from the first side edge 19. And the protrusion 24 is made into the form which narrows front-back length gradually toward the protrusion end. The front-rear dimension of the base part of the projecting piece 24 is made larger than the front-rear dimension of each base part of the short piece 21 and the long piece 22. Further, the rear edge of the projecting piece 24 is cut out in a taper shape substantially at the center in the width direction of the support portion 11.

  The projecting piece 24 is disposed between the short piece 21 and the long piece 22 in the front-rear direction. In other words, the projecting piece 24 is disposed at a position facing the groove portion 23 in the width direction, and is fitted into the groove portion 23 when wound around the covering 62. It is supposed to be combined. That is, the projecting piece 24 has an outer edge shape that can be fitted along the inner edge of the groove 23.

Next, the effect of the terminal metal fitting 10 of this embodiment is demonstrated.
Both wire barrel pieces 17 of the wire barrel portion 14 are crimped and crimped to the core wire 61 exposed at the end portion of the electric wire 60, and each barrel piece 18 of the insulation barrel portion 13 is crimped and crimped to the covering 62 at the end portion of the electric wire 60. . In the case shown in the drawing, the short piece 21 is wound around an area of a quarter or more and a half or less in the circumferential direction of the covering 62, and the long piece 22 and the projecting piece 24 are wound around an area of a half or more in the circumferential direction of the covering 62. It has become. A meandering groove 29 having a predetermined groove width is formed between the short piece 21 and the second side edge 20, between the short piece 21 and the protruding piece 24, and between the protruding piece 24 and the long piece 22. It has become so. The front edge of the long piece 22 is disposed along the rear edge of the protruding piece 24, and the long piece 22 is released to the rear region of the protruding piece 24.

  By the way, when the diameter of the covering 62 of the electric wire 60 is large, the long piece 22 is wound around the covering 62 of the electric wire 60 with an appropriate length, thereby ensuring an appropriate winding state between the long piece 22 and the protruding piece 24. Thus, the terminal fitting 10 is connected to the electric wire 60 with a predetermined holding force. On the other hand, when the diameter of the covering 62 of the electric wire 60 is small, the appropriate length of the short piece 21 and the protruding piece 24 is ensured by winding the short piece 21 around the covering 62 of the electric wire 60 with an appropriate length. The terminal fitting 10 is connected to the electric wire 60 with a predetermined holding force.

  Thus, according to this embodiment, when the diameter of the covering 62 of the electric wire 60 is thick, the long piece 22 is crimped to the covering 62 of the electric wire 60 with an appropriate crimping allowance, and the diameter of the covering 62 of the electric wire 60 is In the case of being thin, since the short piece 21 is crimped to the covering 62 of the electric wire 60 with an appropriate crimping allowance, the terminal fitting 10 is connected to both the thick line and the thin line with an appropriate holding force. As a result, the connection reliability by the terminal fitting 10 is improved.

  In addition, since the protruding pieces 24 are arranged between the short pieces 21 and the long pieces 22 in a state where each barrel piece 18 is wound around the covering 62 of the electric wire 60, the short pieces 21, the long pieces 22, and the protruding pieces 24 are mutually connected. There is no wrapping. As a result, even if the thickness of the electric wire 60 is changed, it is not necessary to consider the wrap amount of each barrel piece 18, and a stable holding force by the terminal fitting 10 can be obtained.

  Further, since the long piece 22 is formed at the rear end portion of the support portion 11, even when the protruding amount of the long piece 22 increases, interference between the long piece 22 and the second side edge 20 of the support portion 11 is avoided. It becomes easy to do.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) A barrel piece other than the short piece and the long piece may be formed on the first side edge of the support portion.
(2) A barrel piece other than the protruding piece may be formed on the second side edge of the support portion.
(3) The front and rear dimensions of each barrel are arbitrary.
(4) The present invention is also applicable to a male terminal fitting having a male tab protruding forward.

DESCRIPTION OF SYMBOLS 10 ... Terminal metal fitting 18 ... Barrel piece 21 ... Short piece 22 ... Long piece 24 ... Projection piece 60 ... Electric wire 62 ... Covering

Claims (3)

Formed of conductive metal plate,
A terminal fitting comprising a support part for supporting the terminal part of the electric wire, and a plurality of barrel pieces that protrude from both side edges of the support part and are wound around and crimped on the covering in the terminal part of the electric wire,
The plurality of barrel pieces are arranged in parallel with a short piece protruding from one side edge of the both side edges of the support portion, and protruded from the one side edge with a large protruding quantity. A terminal fitting having a long piece.   The plurality of barrel pieces protrude from the other side edge of the both side edges of the support portion, and have a protruding piece disposed between the short piece and the long piece in a state of being wound around the covering. The terminal fitting according to claim 1, wherein   The terminal fitting according to claim 2, wherein the long piece is formed at an end of the support portion.

Images