阅读说明：本技术 扁平电线的连接构造 (Connection structure of flat electric wire ) 是由 高濑慎一 津曲隆行 于 2019-07-05 设计创作，主要内容包括：扁平电线的连接构造(1)具备：扁平电线(10),具备带状的导体路径(11)和包覆导体路径(11)的绝缘树脂膜(12)；端子配件(30),具备与扁平电线(10)连接的第一连接部(31)；及焊料,将导体路径(11)与第一连接部(31)电连接。第一连接部(31)具备：载置板部(32),供扁平电线(10)载置；及一对阻挡壁(33),与载置板部(32)相连,并夹着扁平电线(10)而配置。扁平电线(10)具有与载置板部(32)对向的背面(10R)和与背面(10R)相反侧的表面(10F),导体路径(11)从绝缘树脂膜(12)露出于表面(10F),在表面(10F)重叠有焊料(H)。(A flat wire connection structure (1) is provided with: a flat wire (10) provided with a strip-shaped conductor path (11) and an insulating resin film (12) covering the conductor path (11); a terminal fitting (30) having a first connecting portion (31) to which a flat wire (10) is connected; and solder for electrically connecting the conductor path (11) and the first connection portion (31). The first connection section (31) is provided with: a mounting plate section (32) on which the flat wire (10) is mounted; and a pair of barrier walls (33) connected to the mounting plate section (32) and disposed so as to sandwich the flat electric wire (10). The flat electric wire (10) has a back surface (10R) facing the mounting plate section (32) and a surface (10F) opposite to the back surface (10R), the conductor path (11) is exposed from the insulating resin film (12) to the surface (10F), and solder (H) is superimposed on the surface (10F).)

1. A flat wire connection structure includes:

a flat wire including a strip-shaped conductor path and an insulating layer covering the conductor path;

a terminal fitting having a connecting portion to be connected to the flat wire; and

a solder electrically connecting the conductor path and the connection portion,

the connecting portion includes:

a mounting part for mounting the flat electric wire; and

a pair of stopper portions connected to the mounting portion and disposed so as to sandwich the flat electric wire,

the flat electric wire has one surface facing the placement portion and another surface opposite to the one surface, the conductor path is exposed to the another surface from the insulating layer,

the other surface is overlapped with the solder.

2. The connection structure of flat electric wire according to claim 1,

the blocking portion is disposed opposite to the other surface of the flat wire.

Technical Field

The technology disclosed in the present specification relates to a connection structure of a flat electric wire.

Background

A structure is known in which a core wire of an electric wire is overlapped on a conductor path of a flat cable, and the conductor path and the core wire are connected by welding (see patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2003-217709

Disclosure of Invention

Problems to be solved by the invention

When a strong force is applied to the electric wire in the connection structure as described above, a crack may be generated and extend into the joint portion, thereby reducing connection reliability.

Means for solving the problems

The flat wire connection structure disclosed in the present specification includes: a flat wire including a strip-shaped conductor path and an insulating layer covering the conductor path; a terminal fitting having a connecting portion to be connected to the flat wire; and a solder electrically connecting the conductor path and the connection portion, the connection portion including: a mounting part for mounting the flat electric wire; and a pair of stoppers connected to the mounting portion and disposed so as to sandwich the flat electric wire, wherein the flat electric wire has one surface facing the mounting portion and another surface opposite to the one surface, the conductor path is exposed from the insulating layer to the another surface, and the solder is superimposed on the another surface.

According to the above configuration, when the conductor path is connected to the connecting portion by the solder, the solder is stopped by the stopper portion, and the solder is restricted from flowing out to the outside of the mounting portion.

In the above configuration, the stopper may be disposed to face the other surface of the flat electric wire. According to this configuration, since the stopper is disposed to face the other surface of the flat wire, the strength of the connection portion between the flat wire and the terminal fitting is improved.

Effects of the invention

According to the connection structure of the flat electric wire disclosed in the present specification, the connection reliability of the flat electric wire and the terminal fitting can be ensured.

Drawings

Fig. 1 is a perspective view of a flat electric wire connection structure according to an embodiment.

Fig. 2 is a front view of a connection configuration of a flat electric wire of the embodiment.

Fig. 3 is a perspective view of a terminal fitting to which an electric wire is connected in the embodiment.

Fig. 4 is a perspective view of the flat electric wire of the embodiment.

Fig. 5 is a perspective view showing a case where the flat electric wire is placed on the placement plate portion in the embodiment.

Fig. 6 is a perspective view showing a case where the flat electric wire and the connecting portion between the electric wire and the terminal fitting are housed in the protective case in the embodiment.

Fig. 7 is a perspective view showing a case where the flat electric wire and the connecting portion of the electric wire and the terminal fitting are housed in the lower case in the embodiment.

Fig. 8 is a perspective view of a connection structure of a flat electric wire according to a modification.

Fig. 9 is a front view of a connection structure of a flat electric wire of a modification.

Detailed Description

< embodiment >

The embodiment will be described with reference to fig. 1 to 7. As shown in fig. 1, a connection structure 1 of a flat electric wire 10 according to the present embodiment includes a flat electric wire 10, an electric wire 20, and a terminal fitting 30 for connecting the two.

The flat electric wire 10 is formed of a flexible printed circuit board (FPC), and has a flat plate shape having a front surface 10F (corresponding to "the other surface") and a back surface 10R (corresponding to "the one surface"), as shown in fig. 4. The flat electric wire 10 includes a strip-shaped conductor path 11 formed of a copper foil, and an insulating resin film 12 (insulating layer) covering both surfaces of the conductor path 11. At the tip end of the flat electric wire 10, the insulating resin film 12 on the surface 10F is removed to expose the conductor path 11. On the other hand, on the back surface 10R of the flat electric wire 10, a reinforcing plate 13 for reinforcing the tip end portion is provided so as to cover the entire back surface 10R of the tip end portion. The reinforcing plate 13 is made of, for example, glass epoxy resin, polyimide resin, or the like. In fig. 1, 2, and 7, the conductor path 11 and the insulating resin film 12 are not shown, and the entire flat electric wire 10 is schematically shown.

As shown in fig. 3, a copper wire of a known structure of the wire 20 includes a core wire 21 made of a stranded wire obtained by stranding a plurality of copper or copper alloy wires, and an insulating coating 22 made of a synthetic resin covering the core wire 21. At the terminal portion of the electric wire 20, the insulating coating 22 is stripped to expose the core wire 21.

As shown in fig. 3, the terminal fitting 30 includes a first connection portion 31 (corresponding to a "connection portion") to which the flat electric wire 10 is connected and a second connection portion 41 to which the power supply line 20 is connected.

As shown in fig. 3, the first connecting portion 31 is U-shaped before being connected to the flat electric wire 10. The portion corresponding to the bottom of the U-shape is a flat plate-like mounting plate portion 32 (corresponding to the "mounting portion") on which the tip end portion of the flat wire 10 is mounted. Portions extending perpendicularly from the mounting plate portion 32 and corresponding to both longitudinal sides of the U-shape are blocking walls 33 (corresponding to "blocking portions").

As shown in fig. 2, in a state where the first connection portion 31 is connected to the flat electric wire 10, the tip end portion of the flat electric wire 10 is sandwiched by the two blocking walls 33 and overlaps the mounting plate portion 32. The tip end of the flat wire 10 is overlapped on the mounting plate 32 so that the back surface 10R on which the reinforcing plate 13 is disposed faces the mounting plate 32 and the front surface 10F on which the conductor path 11 is exposed faces the opposite side of the mounting plate 32. At the tip of the flat electric wire 10, the surface 10F where the conductor path 11 is exposed is covered with the solder H, and the conductor path 11 and the first connection portion 31 are electrically connected by the solder H. The two barrier walls 33 are bent inward so that the distal ends (the end edges on the opposite side to the mounting plate portion 32) abut against each other, and cover the distal ends of the flat electric wires 10 and the solder H attached to the surfaces 10F thereof.

As shown in fig. 3, the second connection portion 41 includes a belt-shaped bottom plate 42 connected to the mounting plate portion 32, a pair of wire barrels 43 rising from the bottom plate 42, and a pair of insulation barrels 44 similarly rising from the bottom plate 42. The wire barrel 43 is crimped to the core wire 21 exposed from the insulating coating 22 at the end of the electric wire 20, and the insulating barrel 44 is crimped to the portion of the electric wire 20 covered with the insulating coating 22, whereby the electric wire 20 is connected to the second connection portion 41.

When the flat electric wire 10 is connected to the first connecting portion 31, as shown in fig. 5, first, the tip end portion of the flat electric wire 10 is placed on the placing plate portion 32. At this time, the rear surface 10R on which the reinforcing plate 13 is disposed faces the mounting plate portion 32, and the front surface 10F on which the conductor path 11 is exposed faces the side opposite to the mounting plate portion 32. Next, solder H is applied to the front end portion of the surface 10F where the conductor path 11 is exposed, and the conductor path 11 and the first connection portion 31 are connected by soldering. At this time, the solder H stays inside the U-shape surrounded by the mounting plate portion 32 and the two barrier walls 33, and the solder H does not flow out, so that a fillet can be formed satisfactorily. Subsequently, the two blocking walls 33 are bent inward in such a manner that the front ends abut against each other. Thus, the connection of the flat electric wire 10 to the first connecting portion 31 is completed.

As shown in fig. 6 and 7, the connection portions between the flat electric wires 10 and 20 and the terminal fittings 30 are housed in a protective case 50 and protected. The protective case 50 includes a lower case 51 and an upper case 53, the lower case 51 includes a receiving groove 52 for receiving the flat electric wires 10 and the connection portion between the electric wires 20 and the terminal fittings 30, and the upper case 53 is assembled to the lower case 51 and covers the connection portion received in the receiving groove 52.

As described above, according to the present embodiment, the connection structure 1 of the flat electric wire 10 includes: a strip-shaped conductor path 11; a flat wire 10 having an insulating resin film 12 covering a conductor path 11; a terminal fitting 30 having a first connecting portion 31 connected to the flat wire 10; and solder H electrically connecting the conductor path 11 and the first connection portion 31. The first connection portion 31 includes: a mounting plate 32 on which the flat electric wire 10 is mounted; and a pair of barrier walls 33 connected to the mounting plate portion 32 and disposed so as to sandwich the flat electric wire 10, wherein the flat electric wire 10 has a back surface 10R facing the mounting plate portion 32 and a front surface 10F opposite to the back surface 10R, the conductor path 11 is exposed from the insulating resin film 12 to the front surface 10F, and the solder H is superimposed on the front surface 10F.

According to the above configuration, when the conductor path 11 is connected to the first connection portion 31 by the solder H, the solder H is blocked by the blocking wall 33, and the solder H is restricted from flowing out to the outside of the mounting plate portion 32, so that the fillet can be formed satisfactorily, and the reliability of connection between the flat electric wire 10 and the terminal fitting 30 can be ensured.

The blocking wall 33 is disposed opposite to the surface 10F of the flat electric wire 10. With this structure, the strength of the connection portion between the flat electric wire 10 and the terminal fitting 30 is improved.

< modification example >

Fig. 8 and 9 show a connection structure 60 of a flat electric wire 10 according to a modification. In the terminal fitting 61 of the present modification, after welding, the two stopper walls 62 are kept standing up from the mounting plate portion 32 without bending. Even with such a configuration, as in the embodiment, since the solder H is stopped by the stopper wall 62 at the time of soldering and the solder H is restricted from flowing out to the outside of the mounting plate portion 32, it is possible to form a good solder fillet and ensure the reliability of connection between the flat electric wire 10 and the terminal fitting 61. In the present modification, since the configurations other than the above are the same as those of the embodiment, the same reference numerals are given to the same configurations, and the description thereof is omitted.

< other embodiments >

The technology disclosed in the present specification is not limited to the embodiments described above and illustrated in the drawings, and includes, for example, the following various embodiments.

(1) In the above embodiment and modification, the flat cable 10 is formed of an FPC, but is not limited thereto, and may be formed of a Flexible Flat Cable (FFC), for example.

(2) In the above embodiment, the terminal fitting 30 includes the second connection portion 41 connected to the electric wire 20, but the terminal fitting may include a terminal connection portion connected to another terminal fitting, for example.

Description of the reference symbols

1. Connection structure of 60 … flat electric wire

10 … flat electric wire

10F … surface (another side)

10R … back side (one side)

11 … conductor path

12 … insulating resin film (insulating layer)

30 … terminal fitting

31 … first connection part (connection part)

32 … carrying plate part (carrying part)

33. 62 … Barrier wall (Barrier)

H … solder