JPH05129746A - Conductor wire connection structure of circuit board and manufacture thereof - Google Patents

Abstract

PURPOSE:To conduct the electrical connection work of a conductor wire efficiently and reliably and to improve the productivity of a circuit board. CONSTITUTION:An exposed end part 14a of a conductor wire 14 is superposed on contact members 17 reflow-soldered on land parts 16a of a conductor foil pattern 16 in the state of an electrical contact to the members 17, a fixing means 15 is datachably made to fit in the side of a circuit board 12 and the exposed end part 14a of the wire 14 is to made to press-bondecl simply and reliably to the side of the land parts 16a of the pattern 16 by the pressing force of this means 15 via the members 17. In such a way, a conductive wire connection structure of the circuit board is manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor wire connection structure for a circuit board, which is formed by electrically connecting a conductor foil pattern formed on a circuit board and a conductor wire, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Generally, in connecting a conductor wire to a conductor foil pattern formed on a circuit board, a conductor wire connecting structure as shown in FIGS. 6 to 8 is used.
First, in the conductor wire connection structure shown in FIG. 6, the male connector 2 is loaded on the land portion of the conductor foil pattern formed on the circuit board 1 by reflow soldering or the like, and the lead wire as the conductor wire is used. A female connector 4 is provided at the exposed end portion of 3. Then, the lead wire 3 is connected by fitting the female connector 4 to the male connector 2 side. Further, in the structure shown in FIG. 7, the female connector 5 is installed on the circuit board 1 side, and the flat cable is connected by inserting the exposed end of the flat cable 6 into the female connector 5. Further, in the structure shown in FIG. 8, the exposed end portion of the lead wire 7 is directly soldered to the land portion of the conductor foil pattern on the circuit board 1 side.

[0003]

However, in the conductor wire connection structure shown in FIGS. 6 and 7, a heat resistant connector must be used in order to perform the reflow process, and there is a problem that it is difficult to rationalize. Further, the conductor wire connection structure shown in FIG. 8 requires a manual soldering work, which causes a problem in productivity, is likely to cause a connection error, and cannot easily attach and detach the lead wire. There is a problem.

Therefore, the present invention provides a conductor wire connection structure for a circuit board and a method for manufacturing the same so that the conductor foil pattern of the circuit board and the conductor wire can be connected easily, reliably and detachably. The purpose is to do.

[0005]

In order to achieve the above object, a conductor wire connection structure for a circuit board according to the present invention has an exposed end portion of the conductor wire in a land portion of a conductor foil pattern formed on the circuit board. In a conductor wire connection structure of a circuit board electrically connected, a contact member soldered on the land portion of the conductor foil pattern by reflow and a contact member superposed in an electrically contact state on the contact member. An exposed end portion of the conductor wire and a fixing means detachably fitted to the circuit board side are provided, and the exposed end portion of the conductor wire serves as a contact member due to a fitting pressing force of the fixing means. It is configured such that it is pressed and fixed to the land portion side of the conductor foil pattern via. Further, the method for manufacturing a conductor wire connection structure for a circuit board according to the present invention is a circuit board in which an exposed end of a conductor wire is electrically connected to a land portion of a conductor foil pattern formed on the circuit board. In the method for manufacturing a conductor wire connection structure, a step of soldering a contact member on the land portion of the conductor foil pattern by reflow, and an exposed end portion of the conductor wire being superposed on the contact member in an electrically contacting state. The step of aligning, the fixing means is detachably fitted to the circuit board side, and the exposed end portion of the conductor wire is attached by the fitting pressing force of the fixing means.
The conductor wire is fixed to the land portion side of the conductor foil pattern via a contact member to fix the conductor wire.

[0006]

In each means having such a structure, the conductor foil pattern and the conductor wire on the circuit board are pressed and electrically connected only by fitting the fixing means to the circuit board. Since this electrical connection is made via the contact member, an extremely good contact state is maintained. Further, if the fixing means is removed from the circuit board side, the conductor wire can be separated from the conductor foil pattern.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. An embodiment in which the present invention is applied to a capstan motor is shown in FIGS. 1 to 4. First, as shown in FIG. 4, the circuit board 12 is attached to the main body 11 of the capstan motor. A variety of motor circuit components 13 are loaded on the circuit board 12, and an exposed end portion 14a of a flat cable 14 as a conductor wire is connected via a pushing fixture 15 as a fixing means.

Here, as shown in FIGS. 1 to 3, the circuit board 12 in this embodiment is obtained by depositing an insulating layer 12b on the surface of an iron substrate 12a. A plurality of conductor foil patterns 16 are formed via 12b. A land portion 16a is formed at an end portion of the conductor foil pattern 16, and a switch contact member 17 is first soldered on the land portion 16a by reflow. Then, on the surface of the switch contact member 17, the exposed end portion 14 of the flat cable 14 is provided.
a is superposed in an electrically contacting state. No resist, silk printing or the like is applied to the electrical contact region of the land portion 16a of the conductor foil pattern 16,
It is protected by taping or the like until the switch contact member 17 is connected. In the process of soldering other circuit components by reflow, the switch contact member 17
Since it is also possible to simultaneously solder the switch contact members by reflow, it is not necessary to separately add a step for soldering the switch contact member 17.

On the other hand, a pair of mounting holes 18, 18 are formed through the circuit board 12 so as to sandwich the land portion 16a from both sides in the width direction of the conductor foil pattern 16. The leg portions 15a, 15a of the pressing fixture 15 are detachably fitted in the mounting holes 18, 18. The legs 15a, 15a of the push-in fixture 15 are the main body 1
5b is provided so as to project toward both sides of the circuit board 12 from the both ends thereof, and the arrow-shaped engaging portions of the half-split structure formed at the respective tip portions of the leg portions 15a, 15a are the circuit board. It is designed to be inserted into the mounting holes 18, 18 on the 12th side so as to be detachably fitted.

In the state where the push-in fixture 15 is fitted to the circuit board 12 side, the portion of the body barrel 15b facing the circuit board 12 side is reinforced with plastic on the exposed end 14a of the flat cable 14. The plates 19 are pressed against each other. At this time, the body 15b of the push-in fixture 15 is provided with pressing portions 15c, 15c ,. Each of these pressing portions 15c is a land portion 1 of the copper foil pattern 16.
6a, the switch contact member 17, and the exposed end portion 14a of the flat cable 14 are arranged in correspondence with each other, and the pressure contact force of the pressing fixture 15 is focused. As a result, the pushing force into the flat cable 14 is increased, and the exposed end portion 14a of the flat cable 14 becomes
The switch contact member 17 and the conductor foil pattern 16 are strongly pressed against the land portion 16a side.

As described above, in the above-described embodiment, if the push-fitting fixture 15 is fitted to the circuit board 12 side, the push-fitting fixture 1
The flat cable 14 is pressed against the switch contact member 17 and the conductor foil pattern 16 by the pressing force of 5, and the flat cable 14 is electrically connected. Therefore, when connecting the flat cable 14, there is no need to use a connector or soldering as in the conventional case, and the connecting work can be performed easily and surely. Since the electric connection of the flat cable 14 is performed through the switch contact member 17, the contact state is maintained extremely excellent.

On the other hand, when the push-fastening fixture 15 is released and the push-fastening fixture 15 is removed from the circuit board 12, the flat cable 14 is detached from the switch contact member 17 and the conductor foil pattern 16.

At this time, as in the embodiment shown in FIG.
Semi-circular guide portions 14b and 14b are cut out at both edge portions of the exposed end portion 14a of the flat cable 14, and the guide portions 14b and 14b are formed into the leg portions 15a and 15a of the pushing fixture 15. If they are engaged with each other, the flat cable 14 can be positioned easily and surely. Further, after connecting the conductor wires, there is an effect of preventing the conductor wires from being displaced by an external force and an effect of preventing the conductor wires from coming off.

In the above-described embodiment, a pair of legs 15a are provided at both ends of the push-in fixture 15, but it is also possible to provide three or more legs 15a.
In this way, the fixability of the push-in fixture 15 can be enhanced.

The present invention can be similarly applied to various conductor wires other than the flat cable, and can be applied to any type of circuit board.

[0017]

As described above, according to the present invention, the contact member is reflow-soldered on the land portion of the conductor foil pattern, and the exposed end portion of the conductor wire is electrically contacted on the contact member. Since the conductor wires are connected and fixed by overlapping and pressing them with the fixing means that is detachably fitted, the conductors of the circuit board can be obtained only by fitting the fixing means to the circuit board. The connection between the foil pattern and the conductor wire can be easily made, and the connection can be surely made through the contact member. Further, by removing the fixing means from the circuit board side, the conductor wire can be separated from the conductor foil pattern side. Therefore, according to the present invention, the work of electrically connecting the conductor wires can be efficiently performed, the productivity of the circuit board can be improved, and the reliability and maintainability of the product can be improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a conductor wire connection structure of a circuit board according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the conductor wire connection structure in the embodiment shown in FIG.

FIG. 3 is a cross-sectional view of a conductor wire connection structure in the embodiment shown in FIG.

FIG. 4 is a side view showing an example of a circuit board of a motor to which the present invention is applied.

FIG. 5 is an explanatory plan view showing a conductor wire connection structure of a circuit board according to another embodiment of the present invention.

FIG. 6 is a vertical cross-sectional explanatory view showing an example of a conventional conductor wire connection structure.

FIG. 7 is a vertical cross-sectional explanatory view showing another example of a conventional conductor wire connection structure.

FIG. 8 is an explanatory longitudinal sectional view showing still another example of the conventional conductor wire connection structure.

[Explanation of symbols]

 12 circuit board 14a exposed end of flat cable 15 indentation fixture 16a land of conductor foil pattern 17 switch contact member

Claims (2)

[Claims] 1. A conductor wire connection structure for a circuit board, wherein an exposed end of a conductor wire is electrically connected to a land portion of a conductor foil pattern formed on a circuit board. A contact member soldered by reflowing above, an exposed end of the conductor wire superposed on the contact member in an electrical contact state, and a fixing means detachably fitted to the circuit board side. The exposed end portion of the conductor wire is fixed by pressure contact to the land portion side of the conductor foil pattern through the contact member by the fitting pressing force of the fixing means. Conductor wire connection structure. 2. A method for manufacturing a conductor wire connection structure of a circuit board, wherein an exposed end portion of a conductor wire is electrically connected to a land portion of a conductor foil pattern formed on a circuit board. A step of soldering the contact member on the land portion of the pattern by reflow; a step of superposing the exposed end portion of the conductor wire on the contact member in an electrically contacting state; A step of fitting the fixing means, and fixing the conductor wire by pressing the exposed end portion of the conductor wire by a fitting pressing force of the fixing means to the land portion side of the conductor foil pattern via a contact member; A method of manufacturing a conductor wire connection structure for a circuit board, comprising: