JP2019091611A - Connection structure of single core wire - Google Patents

Abstract

To provide a connection structure connecting by detachably attaching a single core wire and a connection position of a counter part side while avoiding an increase in the number of components.SOLUTION: A connection structure 1 of a single core wire is the connection structure 1 for directly connecting a single core wire 10 obtained by covering one conductive core wire 11 with an insulation body 12 to a connection position 27 at a counter part side. The single core wire 10 is constituted such that the conductive core wire 11 having an irregular shape 16 engageable with the connection position is exposed at an end part of the single core wire. The connection position 27 is a conductive engagement part 25 having a shape corresponding to the irregular shape, and has the engagement part 25 engageable with the conductive core wire in a state where the conductive core wire 11 and the engagement part 25 are brought into contact with each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connection structure for directly connecting a single-core wire in which a single conductor core wire is covered with an insulator to a connection point on the other side.

  Conventionally, various connection structures for connecting a single-core wire and a connection point on the other side have been proposed (see, for example, Patent Documents 1 to 3). For example, in one of the conventional connection structures, a conductor core wire exposed at the end of a single-core wire and a connection point formed by welding and bundling a large number of exposed strands at the end of the multicore wire on the other side Welding is performed by ultrasonic bonding (see, for example, Patent Document 1).

JP, 2016-058137, A JP, 2017-027687, A JP, 2011-113928, A

  In the conventional connection structure described above, since the conductor core wire of the single core wire and the connection portion on the other side are welded and connected by ultrasonic bonding, once the welding is completed, the connection state is released (i.e., welding) Separation is difficult. On the other hand, attaching a connector to the end part of both electric wires and fitting connectors as a method of connecting electric wires easily detachably is mentioned. However, in the case of such a connector connection, the number of parts is increased by attaching a connector to both the single-core wire and the other connection point.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a connection structure for detachably connecting a single core wire and a connection portion on the other side while avoiding an increase in the number of parts. is there.

In order to achieve the objective mentioned above, the "connection structure of a single cored wire" concerning the present invention is characterized by following (1)-(3).
(1)
A connection structure for directly connecting a single-core wire of which one conductor core wire is covered with an insulator to a connection point on the other side,
The single core wire is
The conductor core wire having a concavo-convex shape engageable with the connection point is configured to be exposed at an end of the single core wire;
The connection point is
A conductive engagement portion having a shape corresponding to the concavo-convex shape, the engagement portion being engageable with the conductor core in a state where the conductor core and the engagement portion are in contact with each other ,
Must have a single core connection structure.
(2)
In the connection structure described in the above (1),
The conductor core wire is
Composed of aluminum or aluminum alloy,
Must have a single core connection structure.
(3)
In the connection structure described in the above (1) or (2),
The connection point is
It is a location where the mating conductor core wire having the engagement part is exposed at the end of the mating single core wire, or a location where a contact having the engagement part is provided in an electrical connection box
Must have a single core connection structure.

  According to the connection structure of the structure of said (1), the conductor core line itself of a single core line has an uneven | corrugated shape suitable for engagement with the connection location of the other party. And when the conductor core wire which has such uneven | corrugated shape and the electroconductive engaging part which the connection location of the other party has in the state which mutually contacted mutually engaged, both are electrically connected. Become. In other words, the single-core wire and the other connection point are directly connected (engaged) without using a connector or the like. As a result, an increase in the number of parts can be avoided, and attachment and detachment can be facilitated as compared with the case of welding the two.

  Therefore, the single-core wire connection structure of this configuration can connect the single-core wire and the other-side connection point in a detachable manner while avoiding an increase in the number of parts.

  According to the connection structure of the configuration of the above (2), the connection structure of the present invention is applied to a wire (so-called aluminum wire) using aluminum or an aluminum alloy as a material of the conductor core wire for the purpose of weight reduction and cost reduction of the wire. Is applicable. In this case, the conductor core wire having the concavo-convex shape and the engaging portion having a shape corresponding to the concavo-convex shape can be formed by subjecting the conductor core wire to pressing, cutting and the like.

  According to the connection structure of the configuration of the above (3), the connection structure of the present invention can be applied to direct connection between single cored wires or direct connection between a single cored wire and an electrical connection box.

  According to the present invention, it is possible to provide a connection structure in which the single core wire and the other connection point are detachably connected while avoiding an increase in the number of parts.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the modes for carrying out the invention described below (hereinafter referred to as "embodiments") with reference to the attached drawings. .

Fig.1 (a) is a perspective view of the edge part of the single cored wire which concerns on embodiment of this invention, FIG.1 (b) is the perspective view of the edge part of the other party single cored wire which concerns on embodiment of this invention. is there. Fig.2 (a) is a perspective view which shows the state before a single cored wire and the other party single cored wire are connected, FIG.2 (b) shows the state where the single core wire and the other party single cored wire were connected. FIG. 2 (c) is a cross-sectional view taken along the axial direction of FIG. 2 (b). FIG. 3 is a diagram corresponding to FIG. 2A in the case where the other party to be connected is the electrical connection box.

Embodiment
Hereinafter, the single core wire connection structure 1 according to the embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the connection structure 1 is a connection structure for connecting the single-core wire 10 and the other-side single-core wire 20. Hereinafter, the structure of the single cored wire 10 and the mating single cored wire 20 will be described in order.

  First, the single core wire 10 will be described. As shown in FIGS. 1 (a) and 2 (a) to 2 (c), the single-core wire 10 comprises a single conductor core wire 11 having a circular cross section and a resin insulation coating 12 covering the outer periphery of the conductor core wire 11. And. In the present example, the insulating coating 12 covers the entire outer peripheral surface of the conductor core wire 11. The conductor core wire 11 is made of a conductive metal, and preferably made of aluminum or an aluminum alloy for weight reduction and cost reduction.

  From the end face 11 a (plane) of the conductor core 11, the stepped cylindrical uneven portion 16 including the small diameter portion 13, the large diameter portion 14, and the tab portion 15 in this order from the side close to the end surface 11 a It projects integrally integrally with the conductor core wire 11 toward the axial direction tip side so as to be exposed. In this example, the outer diameter of the large diameter portion 14 is smaller than the outer diameter of the conductor core wire 11, the outer diameter of the small diameter portion 13 is smaller than the outer diameter of the large diameter portion 14, and the outer diameter of the tab portion 15 is outer diameter of the small diameter portion 13. Less than diameter.

  The stepped portion of the boundary between the small diameter portion 13 and the large diameter portion 14 (the proximal end side surface of the large diameter portion 14) is constituted by a vertical surface 14a perpendicular to the axial direction, and the boundary between the large diameter portion 14 and the tab portion 15 The step portion (the end side surface of the large diameter portion 14) is formed of a tapered surface 14b which is inclined in a tapered shape (conical side surface shape). Furthermore, an annular recess 17 is formed by the end face 11 a of the conductor core wire 11, the small diameter portion 13, and the vertical surface 14 a of the large diameter portion 14. At an intermediate portion in the axial direction of the tab portion 15, a contact portion 18 that bulges in a curved shape in the radial direction is formed coaxially. The maximum outer diameter of the contact portion 18 is set to a size slightly smaller than the outer diameter of the small diameter portion 13.

  The concavo-convex shaped portion 16 may be formed by cutting the end of the conductor core 11 but is preferably formed by pressing the end of the conductor 11. That is, the concavo-convex shaped part 16 is pressed on the exposed part (cylindrical part) of the conductor core 11 obtained by removing the insulation coating 12 from the end face of the single core wire 10 by the axial length of the concavo-convex part 16 It can be formed by applying

  Next, the mating single core wire 20 will be described. As shown in FIG. 1 (b) and FIG. 2, the mating single core wire 20 also has a single conductor core wire 21 having a circular cross section and the resin insulation coating 22 covering the outer periphery of the conductor core wire 21 as the single core wire 10. And. The conductor core wire 21 is also made of a conductive metal like the conductor core wire 11, and preferably made of aluminum or an aluminum alloy for weight reduction and cost reduction.

  An elongated cylindrical hole 23 for inserting the tab 15 is coaxially formed in the end face 21 a of the conductor core wire 21. Furthermore, on the end face 21 a of the conductor core wire 21, from the position corresponding to both end portions in the diameter direction, the pair of arm portions 24 face the tip end side in the axial direction while opposing in the radial direction It protrudes. A space sandwiched by the pair of arm portions 24 constitutes a holding space 26 for holding the large diameter portion 14. The cantilevered arm 24 is resilient in the radial direction.

  A pair of engaging portions 25 that project in directions (inward in the radial direction) approaching each other are formed at the tip end portions of the pair of arm portions 24. A tapered surface 25 a is formed at the corner on the tip side in the axial direction of the radial inner end of each engaging portion 25. Here, the connection portion 27 of the mating single-core wire 20 is configured by the hole portion 23, the pair of arm portions 24, and the pair of engagement portions 25.

  As can be understood from FIG. 2C, the inner diameter of the hole 23 is set to a dimension equal to the maximum outer diameter of the contact portion 18 of the tab portion 15 (a size slightly smaller than the maximum outer diameter is preferable) . The distance between the pair of arm portions 24 is set to the same dimension as the outer diameter of the large diameter portion 14. The distance between the radially inner end portions of the pair of engaging portions 25 is set to a dimension equal to the outer diameter of the small diameter portion 13 (therefore, a dimension slightly larger than the maximum outer diameter of the contact portion 18). In other words, the connection portion 27 of the mating single-core wire 20 has a shape corresponding to the uneven portion 16 of the conductor core 11 of the single-core wire 10.

  The connection portion 27 (the hole portion 23, the pair of arm portions 24, and the pair of engagement portions 25) is preferably formed by cutting the end of the conductor core wire 21. That is, the connection point 27 is cut on the exposed portion (cylindrical portion) of the conductor core wire 21 obtained by removing the insulation coating 22 from the end face of the mating single-core wire 20 by the axial length of the arm portion 24 It can be formed by applying

  Then, an example of the connection method of the single cored wire 10 and the other party single cored wire 20 is demonstrated, referring FIG. 2 (a)-(c). First, as shown in FIG. 2A, the proximal end portion of the tab portion 15 of the single core wire 10 with respect to the contact portion 18 is positioned in the gap between the pair of engagement portions 25 of the mating single core wire 20. The single cored wire 10 and the mating single cored wire 20 are coaxially arranged. Next, from this state, the single core wire 10 and the single core wire 20 on the other side are made relatively close in the axial direction, and the tip of the tab portion 15 is inserted into the hole 23 of the single core wire 20 on the other side.

  Next, the single-core wire 10 and the mating single-core wire 20 are brought closer to the axial direction, and the tapered surface 14b of the large diameter portion 14 is brought into contact with the tapered surfaces 25a of the pair of engaging portions 25. 10 and the mating single core wire 20 are pressed in a direction relatively approaching in the axial direction. By this pressing force, the tapered surfaces 14 b press the pair of tapered surfaces 25 a radially outward.

  As a result, the large diameter portion 14 passes through the gap between the pair of engaging portions 25 in a state where the pair of arm portions 24 is elastically deformed outward in the radial direction, and the tab portion 15 penetrates deeper into the hole 23. However, the single cored wire 10 and the mating single cored wire 20 are relatively closer in the axial direction. Thus, the contact portion 18 of the tab portion 15 enters the hole 23 as the tab portion 15 enters the hole 23 more deeply.

  Then, when the large diameter portion 14 passes the gap between the pair of engaging portions 25 and the whole enters the holding space 26, the pair of arm portions 24 elastically return inward in the radial direction, and the pair of engaging portions 25 The annular recess 17 is fitted. As a result, as shown in FIG. 2B and FIG. 2C, the connection of the single-core wire 10 and the mating single-core wire 20 is completed, and the single-core connection structure 1 is obtained.

  In this connection structure 1, the conductor core 11 and the conductor core 21 (thereby, the single core wire 10 and the mating single core wire 20) are directly connected by the contact portion 18 of the tab portion 15 directly contacting the inner wall surface of the hole 23. The single core wire 10 and the mating single core wire 20 are separated in the axial direction by being electrically connected and the pair of engaging portions 25 engaging the vertical surface 14 a of the large diameter portion 14 (relatively distant) ) Is prevented.

  As mentioned above, according to the connection structure 1 of the single core wire which concerns on embodiment of this invention, the conductor core wire 11 of the single core wire 10 itself is suitable for engagement with the connection location 27 of the other party single core wire 20 which is the other party connection object. The uneven portion 16 is provided. Then, the pair of engaging portions 25 of the connection portion 27 of the mating single core wire 20 and the concavo-convex shaped portion 16 of the conductor core wire 11 engage with each other to connect the single core wire 10 and the mating single core wire 20 27 will be directly connected. Therefore, since both are not connected via a connector etc., the increase in a number of parts is avoidable. Moreover, since both are connected by engagement with the conductor core wire 11 and the connection location 27, compared with the case where both are connected by welding etc., attachment or detachment of both is easy.

  Therefore, the single-core wire connection structure 1 of the present configuration can detachably connect the uneven portion 16 of the single-core wire 10 and the connection portion 27 of the other single-core wire 20 while avoiding an increase in the number of parts.

<Other aspects>
The present invention is not limited to the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the embodiments described above, and appropriate modifications, improvements, etc. are possible. In addition, the material, shape, size, number, arrangement location, and the like of each component in the embodiment described above are arbitrary and not limited as long as the present invention can be achieved.

  For example, in the said embodiment, the other party single core wire 20 is employ | adopted as the other party connection object of the single core wire 10 (refer FIG.1 and FIG.2). However, as shown in FIG. 3, the other-side connection target of the single-core wire 10 may be the electric connection box 30. In this case, the connection point 27 (the hole 23, the pair of arm parts 24, and the pair of engagements) having the same configuration as the connection point 27 of the mating single core wire 20 at the predetermined contact (conductor part) of the electrical connection box 30 A portion 25) is provided, and the uneven portion 16 of the single-core wire 10 and the connection portion 27 of the electric connection box 30 are detachably connected.

  Furthermore, in the above embodiment, the pair of arm portions 24 is provided at the connection portion 27. However, only one of the arm portions 24 may be provided among the pair of arm portions 24. Also by this, the single core wire 10 and the mating single core wire 20 are separated in the axial direction by the engagement portion 25 of one arm portion 24 engaging the vertical surface 14 a of the large diameter portion 14 (relatively The ability to prevent going away can be maintained.

  Furthermore, in the above embodiment, the tab portion 15 is an elongated cylindrical rod portion and the hole 23 is an elongated cylindrical hole, but conversely, the tab portion 15 is an elongated prismatic rod portion, and The hole 23 may be an elongated prismatic hole. In this case, inserting the tab portion 15 into the hole portion 23 can prevent the single core wire 10 and the mating single core wire 20 from rotating relative to each other in the circumferential direction.

Here, the features of the single-core wire connection structure 1 according to the present invention described above will be briefly summarized and listed in the following (1) to (3).
(1)
A connection structure (1) for directly connecting a single-core wire (10) having a single conductor core wire (11) covered with an insulator (12) to a connection point (27) on the other side,
The single core wire (10) is
The conductor core wire (11) having a concavo-convex shape (16) engageable with the connection point is configured to be exposed at an end of the single core wire;
The connection point (27) is
A conductive engaging portion (25) having a shape corresponding to the concavo-convex shape, wherein the conductive core wire (11) and the engaging portion (25) are in contact with the conductive core wire in a state of contact. Having a compatible engagement portion (25),
Single core wire connection structure.
(2)
In the connection structure described in the above (1),
The conductor core wire (11) is
Composed of aluminum or aluminum alloy,
Single core wire connection structure.
(3)
In the connection structure described in the above (1) or (2),
The connection point (27) is
The location where the mating conductor core wire (21) having the engaging portion (25) is exposed at the end of the mating single core wire (20), or the mating portion (25) in the electrical connection box (30) Where the contacts with contacts are provided,
Single core wire connection structure.

1 single core wire connection structure 10 single core wire 11 conductor core wire 12 insulation coating (insulator)
16 Irregularities (Concave and convex)
20 Counterpart single core wire 21 Conductor core wire (Counter conductor core wire)
22 insulation coating (insulator)
25 engagement part 27 connection point 30 electrical connection box

Claims (3)

A connection structure for directly connecting a single-core wire of which one conductor core wire is covered with an insulator to a connection point on the other side,
The single core wire is
The conductor core wire having a concavo-convex shape engageable with the connection point is configured to be exposed at an end of the single core wire;
The connection point is
A conductive engagement portion having a shape corresponding to the concavo-convex shape, the engagement portion being engageable with the conductor core in a state where the conductor core and the engagement portion are in contact with each other. ,
Single core wire connection structure. In the connection structure according to claim 1,
The conductor core wire is
Composed of aluminum or aluminum alloy,
Single core wire connection structure. In the connection structure according to claim 1 or 2,
The connection point is
It is a location where the mating conductor core wire having the engagement part is exposed at the end of the mating single core wire, or a location where a contact having the engagement part is provided in an electrical connection box,
Single core wire connection structure.

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