JP2015156285A - connection terminal and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection terminal and a wire harness by which, when inserting wires into an insertion cylinder part of the connection terminal, wire insertion work can be facilitated by enlarging a diameter of an insertion port and the inserted wires can be held by fastening them from a side opposite to the insertion port of the insertion cylinder part.

SOLUTION: A connection terminal 10 includes a connection part 13 to be electrically connected to a connection target, and an insertion cylinder part 14 into which wires 1 can be inserted. In the insertion cylinder part 14, an insertion port 15a for the wires 1 is formed in an open end side portion 15 at one end side and shaped so as to expand/reduce the diameter thereof. A nut 12 is provided for holding the wires 1 in the open end side portion 15 by reducing the diameter by press-contacting the open end side portion 15 from a closed end side portion 16 at the other end side.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a connection terminal and a wire harness for inserting and holding an electric wire.

  2. Description of the Related Art Conventionally, a connection terminal such as a ground terminal having an electrical connection portion on one end side and an insertion tube portion for inserting and crimping a conductor of an electric wire on the other end side is known (see, for example, Patent Document 1). .

  This connection terminal needs to be inserted in a state in which the conductors of the electric wires are brought into close contact with each other when inserting the conductors of the electric wires, and the number of wires that can be crimped is limited.

  Therefore, for the purpose of facilitating the electric wire insertion work, a slit is provided in the vicinity of the opening end of the insertion tube portion of the ground terminal, and the opening end of the insertion tube portion has a relatively large diameter (for example, Patent Documents 2 and 3).

  With such a configuration, after the conductor is inserted into the insertion tube portion from the opening end, the opening end side of the insertion tube portion can be tightened with a nut to reduce the diameter, so that the conductor can be attached to the ground terminal.

  FIG. 8 shows an example of such a connection terminal. The connection terminal 40 has a wire connection portion 43 in which one end is conductively connected to the connection target and the core wire portion 42 of the wire 41 is inserted in the other end, and the wire 42 is inserted from the open end of the wire connection portion 43. A plurality of slit portions 43a are formed in the direction, and a tapered male screw portion 43b that is gradually tapered toward the opening end direction is formed on the outer periphery of the wire connecting portion 43. A tapered female screw hole is formed in the male screw portion 43b. The formed nut 44 is screwed.

JP-A-10-233241 JP 2003-168502 A Jisso Hei 4-061863

  However, in such a conventional connection terminal, the inner diameter of the opening end of the insertion tube portion for inserting the conductor needs to be tightened by inserting a nut from the opening end side of the insertion tube portion. It was. Moreover, in order to easily perform the nut tightening operation, it has been impossible to set the outer diameter of the insertion tube portion to be extremely larger than the inner diameter of the nut.

  Thereby, the internal diameter of the opening end of the insertion cylinder part for inserting a conductor cannot be enlarged so much. In addition, since it is necessary to insert the conductor into the nut in advance before inserting the conductor of the electric wire into the insertion cylinder, the inner diameter of the nut and the inner diameter of the opening end are about the thickness of the insertion cylinder. However, it is difficult to say that the conductor insertion work can be easily performed, and the workability is still not good.

  The present invention has been made in order to solve the above-described problems, and the diameter of the insertion port when inserting the electric wire into the insertion tube portion of the connection terminal is increased to facilitate the electric wire insertion work. An object of the present invention is to provide a connection terminal capable of holding the inserted electric wire by tightening from the side opposite to the insertion port of the insertion tube portion.

  In order to achieve the above object, the connection terminal according to the present invention is a connection terminal having a connection portion that is electrically connected to a connection target and an insertion tube portion into which an electric wire can be inserted. The opening end side portion on one end side where the insertion opening is formed has a shape capable of expanding and contracting, and the opening end side portion is pressed from the closed end side portion on the other end side of the insertion tube portion to reduce the diameter. The fastening member for holding the electric wire at the opening end side portion is provided.

  With this configuration, the connection terminal according to the present invention increases the diameter of the insertion port when inserting the electric wire into the insertion tube portion of the connection terminal, thereby facilitating the electric wire insertion work and inserting the inserted electric wire. The cylindrical portion can be held by tightening from the side opposite to the insertion port.

  Further, in the connection terminal configured as described above, the insertion tube portion has a plurality of tongue-like projecting pieces adjacent to each other in the circumferential direction of the insertion port on the inner peripheral surface of the opening end side portion, The member may have a substantially annular shape capable of tightening the opening end side portion so as to reduce the diameter by pressing the opening end side portion from the closed end side portion to the plurality of tongue-shaped projecting pieces. .

  In the connection terminal configured as described above, the insertion tube portion has a cylindrical shape in which the opening end side portion has the insertion port, and the closed end side portion is integrally coupled to the connection portion. The attachment member is secured to the plurality of tongue-like projecting pieces by the insertion tube portion and the connection portion so as to be positioned at the closed end side portion, and from the closed end side portion to the open end side portion. It is good also as a structure supported by the said insertion cylinder part in the state in which the movement along an axial direction and rotation around this axial line are possible.

  Further, in the connection terminal having the above-described configuration, the inner peripheral surface and the outer peripheral surface of the opening end side portion have different angles with respect to the central axis of the insertion tube portion, and a part in the axial direction is more than the other portion. Also, it is preferable to have a structure that is formed thick.

  Further, in the connection terminal configured as described above, the tightening member is a nut, and a thread groove that is screwed to the nut is formed on an outer peripheral surface of the opening end side portion, and the closed end side portion is at least the opening end It is preferable that the width of the portion continuing to the side portion is narrower than the minimum inner diameter including the thread groove of the nut.

  In addition, such a connection terminal is applicable to a wire harness provided with one or more electric wires covered with a jacket made of an insulating resin in a state in which a tip portion of a conductor made of an assembly of strands is exposed. .

  According to the present invention, the diameter of the insertion port when inserting the electric wire into the insertion tube portion of the connection terminal is increased to facilitate the wire insertion work, and the inserted electric wire is connected to the insertion port of the insertion tube portion. Can be held by tightening from the opposite side.

It is a perspective view of the connection terminal concerning Embodiment 1 of the present invention. It is sectional drawing of the principal part in the connecting terminal which concerns on Embodiment 1 of this invention. It is a perspective view of a connection terminal in the state where a conductor was inserted in an insertion cylinder part in a connection terminal concerning Embodiment 1 of the present invention. The connection terminal which concerns on Embodiment 1 of this invention is shown, (A) is sectional drawing of the principal part in the state which inserted the conductor in the insertion cylinder part, (B) is the state which inserted and held the conductor press-contacted with the insertion terminal. It is sectional drawing of the principal part. It is a perspective view of the connection terminal in the state where the conductor is pressed and held by the insertion terminal in the connection terminal according to Embodiment 1 of the present invention. The connection terminal which concerns on Embodiment 2 of this invention is shown, (A) is sectional drawing of the principal part of the state which inserted the conductor in the insertion cylinder part, (B) is the state which inserted and held the conductor pressure-contacted with the insertion terminal. It is sectional drawing of the principal part. It is a perspective view of the connection terminal which concerns on Embodiment 3 of this invention. It is a disassembled perspective view of the conventional connection terminal.

  Next, the connection terminal according to the present invention is applied to a wire harness, and each embodiment will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 to 6, the connection terminal 10 includes a terminal body 11 made of a conductive metal material such as aluminum, aluminum alloy, copper, or copper alloy, and a nut 12 as a fastening member. ing.

  The terminal body 11 is an integrated product in which a connection portion 13 that is electrically connected to a connection target (not shown) on one end side and an insertion tube portion 14 that holds the conductor 2 of the electric wire 1 on the other end side are combined. Yes.

  The connecting portion 13 is flattened away from the insertion tube portion 14, and an O-ring-like (or C-ring-like) terminal portion 13a is integrally formed at the end thereof. The outer diameter of the terminal portion 13a is equal to or larger than the inner diameter of the nut 12, and serves to prevent the nut 12 from coming off on the connecting portion 13 side.

  The insertion tube portion 14 has an opening 15a for the electric wire 1 formed in the opening end side portion 15 on one end side and has a shape capable of expanding and contracting, and the opening end side portion 15 is changed from the closed end side portion 16 on the other end side. The wire 1 is held by the opening end side portion 15 by reducing the diameter by pressure contact.

  The opening end side portion 15 has a cylindrical shape having an insertion port 15a and is integrally coupled to the closed end side portion 16. At least a portion continuous from the opening end side portion 15 to the closed end side portion 16 is coaxial. positioned. A pair of slits 15 b are formed in the opening end side portion 15 along the axial direction of the insertion tube portion 14. In addition, the opening end side portion 15 is integrally formed with a plurality of tongue-like projecting pieces 15c adjacent to each other in the circumferential direction of the insertion port 15a on the inner peripheral surface thereof. Furthermore, the open end side portion 15 is formed with a male screw 15d that can be screwed onto the nut 12 on the outer peripheral surface thereof.

  The slit 15 b is formed over substantially the entire length (direction along the axial direction) of the opening end side portion 15, thereby allowing the opening end side portion 15 to be expanded and contracted. Further, the opening end side portion 15 is configured to expand in a widened shape so that the opening end side of the insertion port 15a has the maximum diameter.

  As shown in FIG. 2, the tongue-like projecting piece 15 c has an inner peripheral surface and an outer peripheral surface of the opening end side portion 15 that are different from each other with respect to the central axis when the opening end side portion 15 is in an expanded state. The taper angles θ1 and θ2 are provided, and the taper angle θ1 on the inner peripheral surface side is set to an acute angle (θ1 <θ2) with respect to the taper angle θ2 on the outer peripheral surface side. Thereby, as for the tongue-shaped protrusion 15c, a part of axial direction is thicker than another part. In the present embodiment, the inner peripheral surface side is configured to become thicker toward the opening end of the insertion port 15a, but the inner peripheral surface when the opening end side portion 15 is in a radially contracted state. The position and the number are not particularly limited as long as it protrudes toward the side.

  The closed end side portion 16 is a solid shaft-like member that is hollow or partially along the axial direction. The closed end side portion 16 has a length in a predetermined range along the axial direction from the open end side portion 15 toward the connection portion 13, for example, a length in a range at least equal to the thickness of the nut 12. As a result, the nut 12 is positioned in the closed end side portion 16 in the normal state where the opening end side portion 15 is in the diameter-expanded state, that is, when the electric wire 1 is not held.

  The nut 12 is moved from the closed end side portion 16 to the open end side portion 15 with respect to the plurality of tongue-like projecting pieces 15c, and is moved along the axial direction toward the open end side while being screwed with the male screw 15d. The opening end side portion 15 is gradually tightened to reduce the diameter. Further, in this embodiment, the nut 12 is positioned at the closed end side portion 16 when the electric wire 1 is held by the open end side portion 15, that is, when the open end side portion 15 is in a diameter-expanded state. The opening end side portion 15 and the connection portion 13 in the expanded state are prevented from coming off. At this time, as shown in FIG. 4, the diameter D <b> 1 of the closed end side portion 16 is smaller than the diameter D <b> 2 of the opening end side portion 15 and smaller than the minimum inner diameter D <b> 3 including the thread groove of the nut 12. ing.

  Thereby, the nut 12 is supported by the insertion cylinder part 14 in the state in which the movement along the axial direction from the closed end side part 16 to the opening end side part 15 and the rotation around the axis line are possible.

  The electric wire 1 is covered with an outer covering 3 made of an insulating resin in a state where a tip portion of a conductor 2 made of an aluminum wire, an aluminum alloy wire, or an assembly of wire made of these and other metal materials is exposed. Has been. In addition, it can also be used as an electric wire group covered with a jacket made of an insulating resin so that at least the conductor 2 is exposed in a state where a plurality of the electric wires 1 are bundled.

  Moreover, the electric wire 1 is connected, for example, to a control circuit for a vehicle (control board) as a connection target on one end side, and connected to a controlled device such as a motor for a power window on the other end side. Thus, the wire harness for the vehicle is configured by the connection terminal 10 and the electric wire group in which the electric wire 1 or the plural electric wires 1 are bundled.

  In the above configuration, for example, the connection terminal 10 has the opening end side portion 15 in the reduced diameter state, the nut 12 is inserted, the nut 12 is positioned in the closed end side portion 16, and the opening end side portion 15 is in the diameter expanded state. It is said. It should be noted that this state, that is, the state shown in FIG.

  Next, to hold the electric wire 1 on the connection terminal 10, as shown in FIGS. 3 and 4A, the conductor 2 of the electric wire 1 is inserted from the opening end side of the insertion port 15a, and the nut 12 is closed. It moves along the axial direction from the side part 16.

  Then, as shown in FIGS. 4B and 5, when the nut 12 is moved to the opening end side while being screwed onto the male screw 15 d, and the opening end side portion 15 is brought into a reduced diameter state, the tongue-like projecting piece 15 c is The conductor 2 is compressed.

  Thereby, the electric wire 1 can be held by the connection terminal 10. It should be noted that this state, that is, the state shown in FIG.

  As described above, in the first embodiment, the nut 12 is first inserted into the insertion tube portion 14 and the nut 12 is positioned at the closed end side portion 16 that is opposite to the insertion side of the electric wire 1. it can.

  Thereby, if the diameter of the opening end side portion 15 is increased, not only the conductor 2 of the electric wire 1 can be easily communicated with the insertion port 15a, but also the operation of inserting the electric wire 1 through the nut 12 can be performed. Eliminates need to do before holding.

  As described above, the connection terminal 10 is the connection terminal 10 having the connection portion 13 that is electrically connected to the connection target and the insertion tube portion 14 into which the electric wire 1 can be inserted. The opening end 15a of the electric wire 1 is formed in the opening end side portion 15 and has a shape capable of expanding and contracting, and the opening end side portion 15 is pressed from the other end side closing end portion 16 to reduce the diameter. By providing the nut 12 that holds the electric wire 1 at the end portion 15, the diameter of the insertion port 15 a when the electric wire 1 is inserted into the insertion tube portion 14 of the connection terminal 10 is increased, and electric wire insertion work is performed. While facilitating simplification, the electric wire 1 after insertion can be held by tightening from the side opposite to the insertion port 15a of the insertion tube portion 14.

(Embodiment 2)
FIG. 6 shows a connection terminal according to the second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In particular, the second embodiment is different from the first embodiment. The configuration will be mainly described. In the connection terminal 10 according to the second embodiment, the bottom of the insertion port 15a, that is, the insertion depth of the conductor 2, is substantially the same as the length along the axial direction of the slit 15b.

  Thereby, not only can the positioning when the conductor 2 of the electric wire 1 is inserted into the insertion port 15a be easily performed, but the substantially entire closed end side portion 16 can be a solid shaft member, Can be secured. It should be noted that the work for holding the electric wire 1 is substantially the same as that of the first embodiment.

(Embodiment 3)
FIG. 7 shows a connection terminal according to the third embodiment. The same reference numerals are given to the same components as those in the first embodiment, and the detailed description thereof is omitted. In particular, the second embodiment is different from the first embodiment. The configuration will be mainly described.

  In the connection terminal 10 according to the present embodiment, the entire connection portion 23, in particular, the width W of the terminal portion 23a is made narrower than the inner diameter of the nut 12, and the nut 12 can be inserted from the connection portion 23 side. Is. Thereby, the nut 12 can be easily inserted from the side opposite to the insertion side of the electric wire 1 while ensuring the ease of the insertion operation to the insertion port 15a in the conductor 2 of the electric wire 1.

  In each of the above embodiments, the nut 12 is used as a fastening member. However, a fastening member other than the nut 12, such as a locking claw or a metal tie band, is not particularly limited as long as it is substantially annular at the time of fastening. is not.

  Thus, in the connection terminal 10 of the present invention, the connection terminal 10 includes the connection portion 13 that is electrically connected to the connection target and the insertion tube portion 14 into which the electric wire 1 can be inserted. Is formed such that the insertion opening 15a of the electric wire 1 is formed in the opening end side portion 15 on one end side and is capable of expanding and contracting, and the opening end side portion 15 is pressed and contracted from the closed end side portion 16 on the other end side. By providing the nut 12 for holding the electric wire 1 at the opening end side portion 15 by increasing the diameter, the diameter of the insertion port 15a when the electric wire 1 is inserted into the insertion tube portion 14 of the connection terminal 10 is increased. Thus, the electric wire insertion work can be facilitated and the inserted electric wire 1 can be held by tightening from the side opposite to the insertion port 15a of the insertion tube portion 14.

  In addition, the connection terminal of the present invention increases the diameter of the insertion port when inserting the electric wire into the insertion tube portion of the connection terminal, thereby facilitating the wire insertion work, and the inserted electric wire is inserted into the insertion tube portion. It has the effect that it can hold | maintain by clamping | tightening from the opposite side to an insertion port, and can apply to the whole of a connection terminal and a wire harness.

DESCRIPTION OF SYMBOLS 1 Electric wire 2 Conductor 10 Connection terminal 12 Nut 13 Connection part 14 Insertion cylinder part 15 Open end side part 15a Insertion port 15b Slit 15c Tongue-shaped protrusion 15d Male screw 16 Closed end side part

Claims (6)

A connection terminal having a connection portion electrically connected to a connection target and an insertion tube portion into which an electric wire can be inserted,
The insertion tube portion has a shape in which an opening end side portion on one end side where the insertion port of the electric wire is formed is capable of expanding and contracting,
A fastening member for holding the electric wire at the opening end side portion by pressing the opening end side portion from the closed end side portion at the other end side of the insertion tube portion to reduce the diameter is provided. Connection terminal. The insertion tube portion has a plurality of tongue-like projecting pieces adjacent to each other in the circumferential direction of the insertion port on the inner peripheral surface of the opening end side portion,
The tightening member has a substantially annular shape capable of tightening the opening end side portion so as to reduce the diameter by press-contacting the opening end side portion from the closed end side portion to the plurality of tongue-like projecting pieces. A connection terminal characterized by The insertion tube portion has a cylindrical shape in which the opening end side portion has the insertion port, and the closed end side portion is integrally coupled to the connection portion,
The fastening member is prevented from coming off by the insertion tube portion and the connecting portion so as to be positioned at the closed end side portion with respect to the plurality of tongue-like projecting pieces, and from the closed end side portion to the open end side portion. The connection terminal according to claim 2, wherein the connection terminal is supported by the insertion tube portion in a state in which movement along the axial direction and rotation around the axial line are possible.   The inner peripheral surface and the outer peripheral surface of the opening end side portion have different angles with respect to the central axis of the insertion tube portion, and a portion in the axial direction is formed thicker than the other portions. The connection terminal according to any one of claims 1 to 3, characterized in that: The tightening member is a nut;
A thread groove to be screwed with the nut is formed on the outer peripheral surface of the opening end side portion,
The width of the closed end side portion at least the portion continuous with the open end side portion is narrower than a minimum inner diameter including a screw groove of the nut. Connecting terminal. The connection terminal according to any one of claims 1 to 5,
A wire harness comprising: one or more electric wires covered with an outer sheath made of an insulating resin in a state where a leading end portion of a conductor made of an assembly of strands is exposed.

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