JP2010108671A - Terminal structure of conductive line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid deterioration of contact reliability between an electric wire and a terminal fitting even if an external force in a neck-swinging direction crossing an axis line is applied to an electric wire led outside a cover. <P>SOLUTION: A conductive line 1 is structured by connecting a rear end part of a terminal fitting 20 to a terminal part of an electric wire 10, and a front end part of the terminal fitting 20 is attached on an apparatus 2. In a rear end part of a cover 40 surrounding the terminal fitting 20, the terminal fitting 20 and the electric wire 10 are connected. At a position of corrugate tubes 30 placed further toward a rear side than the terminal fitting 20 among those 30 surrounding the electric wire 10, a mounting member 60 capable of being mounted on a support body 3 of the apparatus 2 is provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal structure of a conductive path.

Patent Document 1 discloses a terminal structure of a conductive path that is configured by connecting a rear end portion of a terminal fitting to a terminal portion of an electric wire, and the front end portion of the terminal fitting is attached to a device. In this terminal structure, the terminal fitting is surrounded by the cover, the terminal fitting and the electric wire are connected at the rear end portion of the cover, the electric wire is led out from the rear end face of the cover, the electric wire is surrounded by the corrugated tube, and the corrugated tube The front end of the is locked to the cover.
JP 2008-071653 A

  In the above conductive path, when an external force in the swing direction (direction intersecting the length direction of the electric wire) acting on the electric wire led out of the cover acts on the electric wire, Can be bent nearby. Since the position where this electric wire is bent is close to the connecting portion between the electric wire and the electric wire connecting portion, the connecting portion between this electric wire and the electric wire connecting portion is affected by the bending of the electric wire. There is a concern that the contact reliability between the two will decrease.

  The present invention has been completed based on the above circumstances, and even if an external force in a swinging direction intersecting the axis of the electric wire led out of the cover acts on the electric wire and the terminal fitting. It aims at avoiding the fall of the contact reliability between.

  As means for achieving the above object, the invention of claim 1 is configured by connecting a rear end portion of a terminal fitting to a terminal portion of an electric wire, and the front end portion of the terminal fitting is attached to a device. A terminal structure of the conductive path, wherein the terminal fitting is surrounded by a cover, a connection position of the terminal fitting with the electric wire is arranged at a position on a rear end side in the cover, and the electric wire is In the terminal structure, the corrugated tube is led out from the rear end surface of the cover, and the front end portion of the corrugated tube surrounding the electric wire is locked in a state in which movement in the axial direction is restricted with respect to the cover. The tube is characterized in that an attachment member that can be attached to the support base of the device is provided at a position behind the terminal fitting in the tube.

  According to a second aspect of the present invention, in the first aspect, the attachment member is a separate part from the corrugated tube, and the attachment position of the attachment member in the axial direction of the electric wire is set on the cover. It is characterized in that an identifiable positioning portion is formed.

<Invention of Claim 1>
By attaching the attachment member to the support base body, the movement of the portion of the corrugated tube behind the terminal fitting is restricted. Thereby, the part corresponding to an attachment member among the electric wires surrounded by the corrugated tube is also restricted from moving greatly in the swinging direction. That is, the portion of the electric wire that extends from the connection position with the rear end of the terminal fitting to the corresponding position with the mounting member is not greatly displaced in the swinging direction. In other words, when an external force in the swinging direction is applied to the portion of the electric wire that is behind the corresponding position with the mounting member, the position where the electric wire is bent and deformed is far from the connection position with the terminal fitting. Yes. Therefore, there is no possibility that the influence of the bending of the electric wire reaches the connection portion with the terminal fitting, and the contact reliability between the electric wire and the terminal fitting is maintained.

<Invention of Claim 2>
Since the attachment position of the attachment member in the axial direction can be specified by the positioning portion, workability when attaching the attachment member to the support base is improved.

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The conductive path 1 of the present embodiment is configured by connecting the rear end portion of the terminal fitting 20 to the terminal portion of the electric wire 10 so that the front end portion of the terminal fitting 20 is attached to the device 2 (for example, a starter motor or the like). It has become. The device 2 is fixedly attached to a support base 3 (for example, a car body). The electric wire 10 constituting the conductive path 1 has a known form in which a conductor 11 is surrounded by an insulating coating 12. At the front end portion (terminal portion) of the electric wire 10, the insulating coating 12 is removed and the conductor 11 is exposed.

  The terminal fitting 20 includes a plate-like terminal body 21 elongated in the front-rear direction, a device connection portion 22 formed at the front end portion of the terminal body 21, and a crimping portion 23 formed at the rear end portion of the terminal body 21. Has been. The device connection part 22 has a form extending perpendicularly downward from the front end of the terminal body 21, and the device connection part 22 is connected to the terminal part of the device 2 so as to be conductive using a bolt (not shown). A connection hole 24 is formed so as to penetrate in the front-rear direction.

  The crimping portion 23 includes a bottom plate that is flush with the terminal main body 21 and two pairs of crimping pieces that rise from both left and right edges of the bottom plate. The front end side portion of the crimping portion 23 is an open barrel-like wire barrel portion 23a, and the rear end side portion of the crimping portion 23 is an open barrel-like insulation barrel portion 23b. The exposed portion of the conductor 11 at the front end portion of the electric wire 10 is connected to the wire barrel portion 23a by crimping, and the insulation coating 12 behind the exposed portion of the conductor 11 in the electric wire 10 remains in the insulation barrel portion 23b. Are connected by crimping. The electric wire 10 connected to the crimping portion 23 continues to the rear of the terminal fitting 20 so as to be substantially parallel to the terminal main body 21.

  A corrugated tube 30 is externally fitted in a region behind the crimping portion 23 in the electric wire 10. The corrugated tube 30 is made of a synthetic resin and has a well-known shape having a bellows shape in which a plurality of locking grooves 31 are formed on the outer periphery at equal angular intervals in the axial direction. The front end of the corrugated tube 30 is located in the vicinity of the rear end of the crimping portion 23. In other words, most of the electric wire 10 is surrounded by the corrugated tube 30 except for the connection portion with the crimping portion 23. The minimum inner diameter of the corrugated tube 30 is the same as or slightly larger than the outer diameter of the insulating coating 12 of the electric wire 10. Therefore, the electric wire 10 does not rattle in the vertical and horizontal directions inside the corrugated tube 30.

  The terminal fitting 20 is entirely surrounded by a cover 40. The cover 40 is configured by combining a synthetic resin upper member 41 and a synthetic resin lower member 42. The upper member 41 includes a cover portion 43 that is elongated in the front-rear direction, and a lid portion 44 that is integrally connected to the front end of the cover portion 43 via a hinge 45. A plurality of upper locking ribs 46 extending in the left-right direction (the circumferential direction when the corrugated tube 30 is assembled) are provided on the inner surface (lower surface) of the rear end portion of the covering portion 43 in the front-rear direction (the electric wires 10 and the corrugated tube 30). (Axial direction) are formed at equal angular intervals. These upper locking ribs 46 have a semicircular arc shape.

  The lower member 42 includes a receiving portion 47 that is elongated in the front-rear direction, and a holding portion 48 that extends downward from the front end of the receiving portion 47 at a right angle. The holding portion 48 is formed with a through hole 49 penetrating in the front-rear direction. On the inner surface (upper surface) of the rear end portion of the receiving portion 47, a plurality of lower locking ribs 50 are formed at equal angular intervals in the front-rear direction corresponding to the upper locking ribs 46. These lower locking ribs 50 have a semicircular arc shape that is concentric and has the same diameter as the upper locking rib 46.

  The terminal fitting 20 connected to the electric wire 10 is assembled to the cover 40 at the same time as the operation of combining the upper and lower members 41 and 42 together. When assembling, the terminal body 21 and the crimping portion 23 are placed on the receiving portion 47, and the locking groove 31 at the front end portion of the corrugated tube 30 is locked to the lower locking rib 50. Further, the device connecting portion 22 is arranged along the front end surface of the holding portion 48.

  Next, the upper member 41 is united so as to cover the lower member 42 from above. At this time, the upper locking rib 46 is locked in the locking groove 31 of the corrugated tube 30, and the terminal body 21 is sandwiched vertically between the cover portion 43 and the receiving portion 47. Thereby, inside the cover 40, the terminal metal fitting 20 is hold | maintained in the state by which the relative displacement to the up-down direction and the inclination to the front-back, left-right were controlled. Further, the crimping portion 23 is accommodated in a space formed between the receiving portion 47 and the cover portion 43 at a position ahead of the upper locking rib 46 and the lower locking rib 50. That is, the connection portion between the terminal fitting 20 and the electric wire 10 is disposed at the rear end portion of the cover 40. Further, the front end portion of the corrugated tube 30 to which the upper and lower locking ribs 46 and 50 are locked is also sandwiched between the receiving portion 47 and the cover portion 43, and the relative movement in the axial direction and the vertical and horizontal directions Is held by the cover 40 in a state in which the relative movement is restricted.

  After the terminal fitting 20 is thus housed in the cover 40 and the front end portion of the corrugated tube 30 is locked to the rear end portion of the cover 40, the terminal fitting 20 is connected to the terminal portion 2 a of the device 2. At the time of connection, the device connection portion 22 is brought into contact with the terminal portion 2a from the front, and the bolt 44 is connected to the connection hole 24 from the front of the holding portion 48 with the lid portion 44 retracted above the holding portion 48. And screwed into the terminal portion 2a. Accordingly, the front end portion (device connection portion 22) of the terminal fitting 20 is fixed to the terminal portion 2a so as to be conductive in a state where movement is restricted. After the terminal fitting 20 is connected to the device 2, the lid portion 44 is rotated downward while the hinge 45 is deformed, and is assembled to the holding portion 48 so as to close the opening (through hole 49) on the front surface. Thereby, the connection part of the apparatus connection part 22 and the terminal part 2a is protected from the interference etc. of a foreign material.

  In the present embodiment, only the front end portion of the terminal fitting 20 is fixed to the device 2. Therefore, when an external force in the swing direction that intersects the axis acts on the electric wire 10 led to the back of the cover 40, the electric wire 10 is bent and deformed, and the influence of the bending reaches the crimping portion 23. There is a concern that the contact reliability between the electric wire 10 and the terminal fitting 20 is lowered. Therefore, the mounting member 60 is provided as a countermeasure.

  The attachment member 60 is a separate component from the corrugated tube 30 and the cover 40, and is a single component in which a first half 61 and a second half 62 made of synthetic resin are connected via a hinge 63. Become. A plurality of first locking ribs 64 having a semicircular arc shape are formed on the upper end side portion of the first half body 61 at equal intervals in the front-rear direction. A mounting hole 65 penetrating in the front-rear direction is formed in the lower end portion of the first half 61. A plurality of pairs of arc-shaped second locking ribs 66 are formed on the side surface of the second half 62 to be spaced apart in the vertical direction, and are formed at equal intervals in the front-rear direction.

  The first half 61 and the second half 62 are combined by deforming the hinge 63. In the state in which the halves 61 and 62 are combined, a positioning hole 67 for penetrating the corrugated tube 30 is formed between the halves 61 and 62 so as to penetrate in the front-rear direction. The first locking rib 64 and the second locking rib 66 are positioned on the inner periphery of the positioning hole 67 so as to be arranged concentrically.

  The attachment member 60 is attached so as to be fitted on the rear end of the front end portion of the corrugated tube 30 with respect to the upper locking rib 46 and the lower locking rib 50 and in the vicinity of the locking region. . In the attached state, the corrugated tube 30 passes through the positioning hole 67 and the first locking rib 64 and the second locking rib 66 are locked in the locking groove 31 of the corrugated tube 30. Due to these locking actions, the attachment member 60 is assembled in a state in which relative movement in the front-rear direction and relative movement in the vertical and horizontal directions are restricted with respect to the corrugated tube 30. The posture of the mounting member 60 around the corrugated tube 30 is such that the mounting hole 65 is positioned below the corrugated tube 30.

  The attachment member 60 attached to the corrugated tube 30 is fixedly attached to the support base 3 by screwing a bolt (not shown) penetrating through the attachment hole 65. By fixing the mounting member 60 to the support base 3, the front end of the corrugated tube 30 behind the terminal fitting 20 and in the vicinity of the terminal fitting 20 is also up, down, left and right with respect to the support base 3. Further, the movement in any of the front and rear directions is fixed in a restricted state.

  Therefore, when an external force in the swinging direction is applied to the rear side of the electric wire 10 relative to the position corresponding to the mounting member 60, the electric wire 10 is behind the position corresponding to the mounting member 60 and the mounting member 60. Bending deformation occurs in the vicinity of the corresponding position. When the attachment member 60 as in this embodiment is not provided, the bending position of the electric wire 10 is in the vicinity of the rear end portion of the terminal fitting 20, that is, the position close to the crimping portion 23. On the other hand, in the present embodiment, the bending position of the electric wire 10 is behind the attachment member 60, and thus is a position away from the crimping portion 23.

  As described above, according to the present embodiment, by attaching the attachment member 60 to the support base 3, the rear portion of the corrugated tube 30 relative to the terminal fitting 20 is restricted, and the electric wire surrounded by the corrugated tube 30. The portion corresponding to the mounting member 60 in 10 is also restricted from greatly moving in the swinging direction. That is, the portion of the electric wire 10 that extends from the connection position with the rear end portion (crimp part 23) of the terminal fitting 20 to the corresponding position with the mounting member 60 is not significantly displaced in the swinging direction. In other words, the position at which the electric wire 10 is bent and deformed when an external force in the swinging direction is applied to the rear portion of the electric wire 10 relative to the position corresponding to the mounting member 60 is the connection position with the terminal fitting 20. It is far from. Therefore, there is no possibility that the influence of the bending of the electric wire 10 reaches the connection portion with the terminal fitting 20, and the contact reliability between the electric wire 10 and the terminal fitting 20 is maintained.

  The cover 40 is formed with a positioning portion 51 for generally specifying the position of the attachment member 60 relative to the cover 40 in the front-rear direction. From the rear end of the cover part 43 of the upper member 41, a plate-like extension part 52 extends rearward substantially in parallel with the cover part 43 from a position higher than the cover part 43, and this plate-like extension part 52. From the rear end, a plate-like positioning portion 51 extends downward substantially at a right angle. The distance in the front-rear direction from the rear end of the cover part 43 to the positioning part 51 is slightly larger than the front-rear dimension of the mounting member 60. Further, a positioning locking rib 53 having an arc shape is formed on the lower edge of the positioning portion 51.

  When the corrugated tube 30 is assembled to the cover 40, the relative displacement in the front-rear direction between the corrugated tube 30 and the cover 40 (positioning portion 51) is restricted by locking the positioning locking rib 53 in the locking groove 31. Is done. Further, the positioning portion 51 is positioned so as to abut or approach the mounting member 60 from behind. Accordingly, the attachment member 60 is sandwiched in the front-rear direction with a slight clearance between the rear ends of the cover portion 43 and the receiving portion 47 and the positioning portion 51. As a result, the attachment member 60 is restricted from largely moving relative to the cover 40 in the front-rear direction. Therefore, when the attachment member 60 is attached to the support base 3, the attachment member 60 approaches the support base 3. It is possible to hold it at the mounting position of the, and workability is improved.

  Further, in a state where the attachment member 60 is attached at a correct position, the upper end side portion of the attachment member 60 is accommodated in the cover 40 (a space surrounded by the plate-like extension portion 52 and the positioning portion 51). It has become. Accordingly, when the mounting member 60 is in an improperly assembled state in which a part or the whole of the mounting member 60 is exposed to the outside of the cover 40, it is easily and surely detected that the mounting position of the mounting member 60 is incorrect. be able to.

  In addition, since the positioning locking rib 53 formed in the positioning portion 51 is locked to the locking groove 31 of the corrugated tube 30, the mounting member 60 is an incorrect position where the mounting member 60 is slightly shifted backward from the correct mounting position ( When the upper member 41 is attached to the lower member 42, the lower edge of the positioning portion 51 is attached to the attachment member 60 when the upper member 41 is attached to the lower member 42. Interferes with the top of the. Whether or not the attachment member 60 is attached at the correct position can be determined based on the presence or absence of interference during the combination.

<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) In the above embodiment, the mounting member is a separate component from the corrugated tube, but the mounting member may be formed integrally with the corrugated tube.

  (2) In the above embodiment, a part of the attachment member is accommodated in the cover, but the whole attachment member may be exposed to the outside of the cover.

  (3) In the above embodiment, the locking rib of the mounting member is locked in the locking groove of the corrugated tube so that the mounting member does not move relative to the corrugated tube in the axial direction. It is good also as a form which can relatively move to an axial direction with respect to a corrugated tube, without forming a latching rib.

Plan view of Embodiment 1 AA line sectional view of FIG. Sectional drawing of the upper member which comprises a cover Bottom view of the upper member constituting the cover Plan view of the lower member constituting the cover BB sectional view of FIG. Plan view of terminal fitting Side view of terminal fitting CC sectional view of FIG. Side view showing the unfolded state of the mounting member DD sectional view of FIG. Plan view showing the unfolded state of the mounting member

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Conductive path 2 ... Apparatus 3 ... Supporting base body 10 ... Electric wire 20 ... Terminal metal fitting 30 ... Corrugated tube 40 ... Cover 51 ... Positioning part 60 ... Mounting member

Claims (2)

It is configured by connecting the rear end portion of the terminal fitting to the terminal portion of the electric wire, and the terminal structure of the conductive path is configured such that the front end portion of the terminal fitting is attached to the device,
The terminal fitting is surrounded by a cover;
The connection position with the electric wire in the terminal fitting is arranged at a position on the rear end side in the cover,
The electric wire is led out of the cover from the rear end surface of the cover,
In the terminal structure in which the front end portion of the corrugated tube surrounding the electric wire is locked in a state in which movement in the axial direction is restricted with respect to the cover,
A terminal structure of a conductive path, wherein an attachment member that can be attached to a support base of the device is provided at a position behind the terminal fitting in the corrugated tube. The mounting member is a separate part from the corrugated tube,
2. The terminal structure for a conductive path according to claim 1, wherein a positioning portion capable of specifying an attachment position of the attachment member in an axial direction of the electric wire is formed on the cover.

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