CN100590934C - Terminal structure and connecting method thereof - Google Patents

Abstract

The invention discloses a terminal structure which is fixedly arranged on a circuit board to electrically connect a conductive wire with the circuit board. The terminal structure comprises a fixing part and a wiring part; the fixing part is fixed on the circuit board, and the wiring part is connected with the fixing part and electrically connected with the conductive wire; and the fixed part and the supporting part are positioned on the same axial line position in the extending direction. The wiring portion has a bend for clamping the conductive wire, so that the conductive wire is fixedly arranged on the wiring portion in a clamping manner or a welding manner. The invention also discloses a connecting method of the terminal structure.

Description

Terminal structure and connection method

technical field

The invention relates to a terminal structure and a connection method thereof, in particular to a terminal structure and a connection method for indirect electrical connection between a circuit board and a conductive wire.

Background technique

Please refer to Fig. 1A and Fig. 1B, the connection mode of traditional circuit board 6 such as brushless motor and conductive wire 5 (such as enameled wire) is that this enameled wire 5 is directly soldered and fixed on this circuit board 6, or passes through this circuit The through holes of the board 6 are fixed by welding with solder s. However, the traditional connection method tends to produce bends circled by A and B as shown in the figure, so that the enameled wire 5 is easily broken due to vibration or pulling, or the pad material on the circuit board 6 ( pad) warping causes the enameled wire 5 to come off. Generally speaking, the above connection method is suitable for ordinary grade enameled wire through which small current passes. When using wire (PEW+NY), it is impossible to directly remove the covering layer of the enameled wire 5 by heating in a tin furnace, but additional chemicals or knives are required to remove the covering layer, which not only causes extra man-hours and processes, but also increases the production process. uncertainties arise. Moreover, forced welding in the existing way may easily cause the connection between the circuit board 6 and the enameled wire 5 to be not stable enough, resulting in a decrease in product reliability.

Therefore, how to provide a terminal structure so that the electrical connection between the conductive wire and the circuit board is stable and does not fall off has become one of the important issues.

Contents of the invention

In view of the above problems, the purpose of the present invention is to provide a terminal structure and its connection method, so as to prevent the conductive wire from bending at the connection point, causing the conductive wire to break due to vibration or pulling, or the pad on the circuit board to warp. cause the conductive wire to fall off.

In order to achieve the above object, according to the present invention, a terminal structure is provided, which is fixed on a circuit board so that a conductive wire is electrically connected to the circuit board. The terminal structure includes a fixing part and a wiring part; the fixing part is fixed on the circuit board. a plate, the wiring part is connected to the fixing part, and is electrically connected to the conductive wire; and a supporting part, the fixing part and the extending direction of the supporting part are located on the same axial position. The connection portion has a bend for clamping the conductive wire, so that the conductive wire is fixed on the connection portion by clamping or welding.

In order to achieve the above object, a connection method of a terminal structure according to the present invention includes the following steps: providing a circuit board and a conductive wire, the terminal structure has a fixing part and a wiring part; fixing the fixing part to the circuit board; and the conductive wire is fixed on the connection part, so that the conductive wire is electrically connected with the circuit board.

Based on the above, according to a terminal structure and its connection method of the present invention, the conductive wire is fixedly connected by clamping or welding of the connection portion of the terminal structure, and the conductive wire and the circuit board are connected via the terminal The structure creates an electrical connection. Compared with the prior art, the present invention has the characteristic that the conductive wire does not bend at the connection part; when it is applied to a higher temperature lead-free manufacturing process or when the conductive wire is covered with an insulating material for direct welding, it can avoid The impact of high temperature soldering on the circuit board improves the reliability of terminal connections.

Description of drawings

Fig. 1A and Fig. 1B are the schematic diagrams of existing circuit board and enameled wire connection mode;

2 is a schematic diagram of a terminal structure according to a preferred embodiment of the present invention;

3 is another schematic diagram of a terminal structure according to a preferred embodiment of the present invention;

4 is a schematic diagram of another terminal structure according to a preferred embodiment of the present invention; and

FIG. 5 is a flowchart of a connection method of a terminal structure according to a preferred embodiment of the present invention.

Description of component symbols:

1, 6 circuit board 2, 2' terminal structure

21 Fixed part 22, 22' Wiring part

23 Support part 24 Insulator

3 Conductive wire 4 Base

3a Conductive wire 3b Insulating material

5 enameled wire 5A, 5B bending

s Solder S1～S3 Process steps

Detailed ways

A terminal structure and connection method thereof according to preferred embodiments of the present invention will be described below with reference to related drawings, wherein the same components will be described with the same reference symbols.

Please refer to FIG. 2 , a terminal structure 2 of a preferred embodiment of the present invention is fixed on a circuit board 1 , so that a conductive wire 3 is electrically connected to the circuit board 1 through the terminal structure 2 . The terminal structure 2 includes a fixing portion 21 and a connecting portion 22 . The fixing portion 21 is fixed to the circuit board 1 by solder s. The fixing portion 21 and the connecting portion 22 are integrally formed and made of conductive materials such as metal or alloy. The connection part 22 has a bend, which is used to clamp and fix the conductive wire 3, so that the conductive wire 3 is electrically connected to the circuit board 1 through the terminal structure 2 and has the function of making the conductive wire 3 not at the connection part 22. curved properties. The conductive wire 3 can be a conductive wire of a motor winding or a wiring of an external system.

The terminal structure 2 also includes a support portion 23, the support portion 23 is connected to the fixing portion 21 and/or the wiring portion 22, and provides support for the fixing portion 21 and the wiring portion 22, and the fixing portion 21, the wiring portion 22 and the support portion 23 are integrally formed. Since the supporting portion 23 is made of conductive material, an insulator 24 is covered to prevent the terminal structure 2 from conducting with other conductive elements. In this embodiment, the supporting portion 23 can be supported on a base 4 , and the supporting portion 23 is fixed on the base 4 by, for example, bonding.

FIG. 3 discloses a preferred embodiment in which the terminal structure 2 of the present invention is used for electrical connection between the circuit board 1 and the enameled wire. As shown in Figure 3, the conductive wire 3 is an enameled wire, that is, the conductive wire 3a is covered with an insulating material 3b, and the conductive wire 3 can be fixed on one side of the terminal structure 2 by spot welding. Wiring part 22'. In this embodiment, because the conductive wire 3 is an enameled wire and is connected to the wiring portion 22 ′ by spot welding, the high temperature generated by the spot welding will not affect the circuit board 1 . The high temperature generated by the spot welding can melt the insulating material covered by the enameled wire, so that the enameled wire is electrically connected to the connecting portion 22 ′. The enameled wire does not require the additional step of wire stripping.

Please also refer to FIG. 4 , another terminal structure 2 ′ according to a preferred embodiment of the present invention includes a fixing portion 21 , a connecting portion 22 , a supporting portion 23 and an insulator 24 . The difference from the previous embodiment is that the fixing part 21, the connecting part 22 and the supporting part 23 of the terminal structure 2' are integrally formed on the same axis position, and it also has the function of making the conductive wire 3 not move at the connecting part 22. curved properties. Since the structure and function of the fixing part 21 , the connecting part 22 , the supporting part 23 and the insulator 24 in this embodiment are as described above, the details will not be repeated here.

Please refer to FIG. 5 , a method for connecting a terminal structure 2 according to a preferred embodiment of the present invention includes steps S1 - S3 . First, step S1 provides a circuit board 1 and a conductive wire 3, and the terminal structure 2 has a fixing portion 21 and a wiring portion 22; then, step S2 is to fix the fixing portion 21 to the circuit board 1; finally, the step S3 is to fix the conductive wire 3 on the connecting portion 22 to electrically connect the conductive wire 3 to the circuit board 1 . Wherein, the sequence of step S2 and step S3 can be reversed, and the conductive wire 3 can also be electrically connected to the circuit board 1 indirectly, so as to avoid the influence of high temperature welding on the circuit board 1 .

To sum up, according to the terminal structure and connection method of the present invention, the conductive wire is fixedly connected by clamping or welding of the terminal structure, and the terminal structure is connected between the conductive wire and the circuit board. An electrical connection is made. Compared with the prior art, the present invention not only can be applied to the lead-free manufacturing process; when the conductive wire is coated with an insulating material, it can be directly soldered without the additional step of removing the wire varnish, and the soldering produced High temperature will not affect the circuit board. Moreover, the connection method using the terminal structure can also reduce the risk of damage to the circuit board, and the reliability of electrical connection is also greatly improved compared with the prior art.

The above descriptions are illustrative only, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of protection claimed by the present invention.

Claims (11)

1. A terminal structure fixed on a circuit board to electrically connect a conductive wire to the circuit board, the terminal structure comprising: a fixing part, fixed on the circuit board; a wiring part connected to the fixed part and electrically connected to the conductive wire, and a supporting part, the fixing part is located on the same axis as the extending direction of the supporting part; Wherein, the connection part has a bend to clamp the conductive wire, so that the conductive wire is fixed on the connection part by clamping or welding. 2. The terminal structure according to claim 1, wherein the fixing part and the connecting part are integrally formed. 3. The terminal structure as claimed in claim 1, wherein the conductive wire is fixed on the connection portion by spot welding. 4. The terminal structure as claimed in claim 1, wherein the conductive wire is coated with an insulating material. 5. The terminal structure as claimed in claim 4, wherein the conductive wire is enameled wire. 6. The terminal structure as claimed in claim 4, wherein the conductive wire is a conductive wire of a motor winding or a wiring of an external system. 7. The terminal structure as claimed in claim 1, wherein the terminal structure is made of metal, alloy or conductive material. 8. The terminal structure according to claim 1, wherein the supporting part is connected to the fixing part and/or the connecting part. 9. The terminal structure as claimed in claim 8, wherein the supporting part is fixed on a base. 10. The terminal structure as claimed in claim 8, wherein the support portion is covered with an insulating material. 11. The terminal structure according to claim 8, wherein the fixing part, the wiring part and the supporting part are integrally formed and located on the same axis.

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