JPH041662Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a connection structure between a flexible cable and a board, which have a soldered portion that is resistant to bending, vibration, etc.

(Prior Art) Conventionally, as a technology in this field, a configuration example as shown in FIG. 3 is known. In other words, it has a structure in which the flexible cable 1 is connected between the divided boards 2 and 3 by direct soldering, and 4 is a stripped core wire part, and the core wire part 4 is inserted into each hole of the boards 2 and 3. It is inserted and soldered with solder 5. The structure is such that vibrations and slight movements of the boards 2 and 3 can be absorbed by the flexible cable.

(Problems to be Solved by the Invention) However, in the case of the flexible cable having the above structure, the soldered parts to the boards 2 and 3, which are arranged at right angles to each other, are damaged due to the vibration of both boards and rotation between them. In the worst case, the wire is bent almost at a right angle, resulting in a large bending angle and severe fatigue of the material, which has the disadvantage that the core wire 4 near the soldering portion 5 is likely to break.

Further, as shown in FIG. 1, an electrical component 16 is provided in a pillow shape near the inside of the curved portions 11a, 11b of the flexible cable 11 soldered to the boards 12, 13, and the soldered parts to the boards 12, 13 are provided in a pillow shape. Conventionally, methods have been devised to prevent wire breakage by increasing the radius of curvature of the curved part. If it is not available, it cannot be implemented and the problem has not been solved.

The purpose of the present invention is to prevent the core wire from breaking at the soldering part between the board and the flexible cable, which are arranged at right angles to each other, and to provide a connection structure with excellent flexibility between the flexible cable and the board. do.

(Means for solving the problem) In order to solve the above-mentioned problems, the present invention aims to provide a flexible cable soldered to the board near the soldering part inside the arc drawn by the flexible cable soldered to the board. It is intended to provide a portion of the

(Function) According to the present invention, when the flexible cable soldered to the board is bent, a part of the flexible cable soldered to the board comes into contact with the bent inside of the flexible cable and is deformed. Accordingly, concentration of bending force on the core wire portion can be prevented, and the radius of curvature near the soldering portion can be maintained at a predetermined size.

(Embodiment) FIG. 2A is a side view showing an embodiment of the present invention, and FIG. 2B is a detailed view showing a flexible cable before soldering.

In FIG. 2A, substrates 22 and 23 arranged at right angles to each other are connected by soldering a flexible cable 21. In FIG.

As shown in FIG. 2B, the flexible cable 21 is provided with a tip portion 25 at both ends by leaving a portion of the coating at the tip, and
The core wire portion 24 is formed by removing the coating at regular intervals, and the core wire portion 24 is bent at an acute angle from near the center of the core wire portion 24 as shown in FIG. 2B. The apexes of the core wire portions 24 formed at both ends of the flexible cable 21 and bent at an acute angle are inserted into the insertion holes and connected by soldering.

Also, as shown in Figure 2A, the flexible cable 2
The tip end 25 of the cable 1 is located near the soldering part inside the curved flexible cable 21.

As a result, when the flexible cable 21 soldered to the boards 22 and 23 is bent, the inside of the flexible cable 21 is bent.
Since the tip portions 25 abut and are bent together, concentration of bending force on the core wire portion 24 is prevented, and
The radius of curvature of the core wire portion 24 can be maintained at a predetermined size by coating the tip portion 25.
It is possible to prevent wire breakage.

(Effects of the invention) As explained in detail above, according to the invention, at the soldering part between the board and the flexible cable, which are susceptible to bending, which are arranged at right angles to each other, a part of the coating at the tip of the flexible cable is left. By removing the coating at regular intervals, a tip with the coating and a core with the coating removed are provided.The core is bent at an acute angle from near the center, and the apex of the bent core is inserted into the insertion hole of the board. The flexible cable is inserted into the board and connected by soldering, and the tip is positioned in the bending direction of the flexible cable and near the connection part of the flexible cable connected to the board, so that it is not soldered to the board. When the flexible cable is bent,
The bent inside of the flexible cable is
By coming into contact with the tip of the flexible cable, the radius of curvature of the flexible cable near the soldering portion can be maintained at a predetermined size. In addition, when the flexible cable is brought into contact, the bending force can be prevented from being concentrated only on the core wire by bending the tip end of the cable together.
This prevents disconnection of the exposed core wire at the soldered part between the board and the flexible cable, and can be expected to improve performance against bending force.

In addition, since a part of the flexible cable used to connect the two boards is used to prevent disconnection, it can be implemented at low cost without using any other parts or increasing the size of the board. and
In addition to being able to prevent disconnections without any particular restrictions on the position at which the flexible cable is attached on the board, the core wire from which the sheath has been removed is bent at an acute angle, and the core wire is inserted into the insertion hole of the board from the bent point and soldered. Since it has a structure that can be implemented by simply performing the process, it is easy to work, and the effect of providing a connected structure with good workability can be expected.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of the configuration of a conventional connection structure, FIG. 2 is a side view and partial detail view showing an embodiment of the connection structure of the present invention, and FIG. 3 is a configuration of a conventional connection structure. It is a side view which shows an example. 21...Flexible cable, 22, 23...
. . . Substrate, 24 . . . Core wire portion, 25 . . . Tip portion.

Claims (1)

[Claims for Utility Model Registration] A connection structure in which a first board and a second board, which are arranged at right angles to each other, are connected by soldering to a flexible cable consisting of a core part and a covering part, comprising: The substrate has a first hole for connecting the flexible cable, the second substrate has a second hole for connecting the flexible cable, and the flexible cable has a constant shape with a part of the coating at the tip remaining. A distal end portion having a coating by removing the spacing coating and a core wire portion from which the coating is removed are provided at both ends, the core wire portions being bent at an acute angle from near the center of each core wire portion, and each of the tip portions being Each of the flexible cables is located inside an arc formed by the flexible cables connected to the first board and the second board, and each of the flexible cables has its tip end connected to the first board and the second board. The apexes of each core wire portion bent at an acute angle from the vicinity of the center portion are inserted into the first hole and the second hole, respectively, so as to be located near the connecting portion, and the first substrate and the second substrate and each core wire portion of a flexible cable are connected to each other.