JP2003319599A - Connecting board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting board for an electric rotating machine in which electrical insulation can be attained sufficiently between wire joints while sustaining a compact overall dimensions of the connecting board. <P>SOLUTION: In the connecting board 10 for an electric rotating machine having lands 11, 12, 13 and 14 provided for respective circuit parts 21, 22, 23 and 24 and jointing a wire for connecting a lead wire with an inter-coil wiring, a flexible board 10 is employed and at least one of adjacent tongue parts 103 provided, respectively, with the adjacent lands 11 and 12, 12 and 13, and 13 and 14 is bent to be spaced apart from a reference plane thus spacing part the tongue parts 103 three-dimensionally. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring board, and more particularly, to a rotary electric machine capable of improving insulation characteristics between circuits by sufficiently electrically insulating electric wire connection portions such as lead wires. Connection board for use.

[0002]

2. Description of the Related Art In rotary electric machines such as small servo motors, DC brushless motors and small induction motors,
An electric wire connecting portion for connecting a wire between the coils and a lead wire for connecting the coils to a power source or the like is provided on the wire connection board.

FIG. 4 is a plan view, a front view and a side view showing an example of the structure of a conventional wiring board for a rotary electric machine. In the figure, a conventional wiring board is a printed circuit board wiring circuit (hereinafter, also referred to as "circuit section") 2 for connecting a ground terminal section and lead wires for three phases on a board 10, for example.
The main configuration is that 1, 22, 23, and 24 are arranged. The substrate 10 has a substantially annular shape in which a part is cut out on a concentric circle of the rotary electric machine shaft center, and a connection terminal portion 101, which is a strip-shaped portion in the centrifugal direction from the rotary electric machine shaft center, is formed from a part thereof. Since it is extended, the substrate 10 has a structure including the annular portion 102 and the connection terminal portion 101. The circuit portions 21, 22, 23, and 24 are the annular portion 10
An electric wire which is a bare conductive part, which is extended from 2 to the connection terminal portion 101 and has lead wire fixing holes, which are holes for temporarily fixing lead wires at the time of soldering work, at the ends thereof. Connection part (hereinafter, also referred to as “land”) 11,
12, 13, and 14 are respectively provided,
In these wire connection portions 11, 12, 13, and 14, the lead wires are fixed by soldering, and each circuit portion 21,
Connections between 22, 23, and 24 and the power supply are made.

The electric wire connecting portions 11, 12, 13, and 1
4 are arranged on the connection terminal portion 10 in a straight line parallel to the end portions of the connection terminal portion, and by being provided with a width of the distance A, they are electrically insulated from each other. Has been planned. As a method of improving the insulation characteristics between the circuit portions 21, 22, 23, and 24 by making the electrical insulation sufficient, it is conceivable to increase the distance A.

[0005]

However, in order to secure a certain workability in the soldering process, the diameter of the lead wire fixing hole must be secured to some extent, which is also the reason. There is a limit in increasing the size of the distance A between the electric wire connecting portions to sufficiently secure the space distance and the creeping distance between the electric wire connecting portions. Therefore, there is a limit to improving the electrical insulation between the wire connecting portions, which are bare conductive portions, and the insulation characteristics between the circuit portions, and sufficient insulation characteristics cannot be obtained. On the other hand, in order to secure a sufficient distance between the electric wire connecting portions in terms of electrical insulation, a means of widening the width dimension of the connecting terminal portion where these are provided can be considered, but this increases the overall size of the wiring board. This makes it difficult to make a selection because it goes against the general demand for miniaturization of rotating electrical machines.

That is, in the trend toward miniaturization of motors, it is an important issue to make the connecting terminal portion provided with the lead wire connecting portion compact. It is necessary to prevent deterioration of electrical insulation characteristics due to insufficient creepage distance or clearance. For that purpose, a sufficient insulation creepage distance in a compact space,
Technology that can secure a spatial distance is required.

[0007] Further, during soldering work, variations in the flow of solder may occur, but in this case there is a limit in securing the creepage distance between each wire connection portion, and if there is too much solder flow, a short circuit will occur. However, stable insulation characteristics cannot be obtained.

The object of the present invention is to solve the above-mentioned drawbacks of the prior art and to secure a necessary creepage distance or space distance while keeping the overall size of the wiring board in a compact state, whereby the wire connecting portions can be secured. To provide a wiring board for a rotary electric machine, which can sufficiently achieve electrical insulation in the above. Another object of the present invention is to provide a wiring board for a rotating electric machine, which can eliminate insulation failure caused by variations in the flow of solder during soldering work.

[0009]

Means for Solving the Problems As a result of earnest studies on the above problems, the inventor of the present application uses a flexible substrate having high convenience as a substrate, and three-dimensionally configures the arrangement relation of each electric wire connecting portion. The inventors have found that the problems can be solved and have reached the present invention. That is, the invention claimed in this application is as follows.

(1) In a wiring board for a rotating electric machine, which has an electric wire connecting portion for connecting an electric wire, such as connecting a lead wire to a coil connecting wire, which is provided for each circuit section, on the board, A wiring board for a rotary electric machine, which is a flexible board.

(2) The substrate has a plurality of tongue pieces,
The electric wire connecting portion is provided on the tongue-shaped piece portion, and one tongue-shaped piece portion is provided with only one electric wire connection portion. Connection board.

(3) At least one of the adjacent tongue-shaped portions provided with the adjacent electric wire connecting portions is separated from the reference plane to which at least a portion other than the tongue-shaped portions of the wiring board belongs. The wiring board for a rotating electric machine according to (2), characterized in that the distance between the adjacent electric wire connecting portions is increased by being bent so as to be.

(4) The adjacent tongue pieces provided with the adjacent electric wire connecting portions are bent so as to be separated from the reference plane to opposite sides, so that the adjacent electric wire connecting portions are connected to each other. The wiring board for a rotating electric machine according to (3), wherein the distance between the parts is increased.

(5) An insulating member is sandwiched between adjacent tongue pieces that are bent so as to be spaced apart from each other from the reference plane.
A wiring board for a rotating electric machine according to (3) or (4).

(6) The electric wire connecting portion comprises a ground terminal portion and lead wire connecting portions for three phases, (1)
(5) A wiring board for a rotating electric machine.

That is, according to the present invention, in the wiring board for a rotary electric machine, the size of the entire wiring board is kept compact by not changing the intervals between the circuit parts, and the flexible board is used as the board. By making it possible to easily construct the layout of each land in three dimensions, it is possible to secure the required creepage distance or space distance and thereby obtain sufficient electrical insulation between the wire connection parts. is there.

That is, the means for solving the problems of the present invention uses a flexible substrate as a substrate, and a tongue-shaped portion formed by dividing the connection terminal portion for each electric wire connection portion in the substrate composed of an annular portion and a connection terminal portion. And, by freely bending the tongue-shaped piece or by interposing an insulator between the tongue-shaped pieces, the space distance and the creepage distance are increased, and thus the electrical insulation characteristics between the wire connection portions are provided. To achieve the improvement of.

In the present invention, the flexible substrate, that is, the flexible printed wiring board is a film-like or film-like substrate also called a flexible printed circuit (FPC). A flexible board can be used to design products with new functions such as the integration of the circuit part and the connection part that you want to fold using its flexibility, it can reduce the weight, and it occupies a small space, so it is high. It has various features such as higher density, reduced soldering points, improved reliability due to prevention of incorrect wiring, and reduced manufacturing cost due to labor saving in processing and mounting processes. .

In the present invention, the reference plane means a plane to which the annular portion, which is a portion other than the tongue-shaped piece portion, belongs to the connection board. Therefore, separation from the reference plane means separation from the reference plane in a direction perpendicular to the reference plane. For example, when one of the adjacent wire connection parts is separated from the reference plane and the other exists in the reference plane shape, or the other is separated from the reference plane on the opposite side, or both are separated from the reference plane on the same side. However, if the distance from the reference plane is different,
In either case, the adjacent electric wire connecting portions are in different three-dimensional positions from each other. The mutually different three-dimensional positions mean positions having different coordinates in the direction perpendicular to the reference plane. By bending the tongue-shaped piece that is a part of the board made of the flexible board, the electric wire connecting portions can be positioned at different three-dimensional positions.

In the present invention, the tongue-shaped portion is provided in the same substrate on which all the electric wire connecting portions are arranged, and in addition to the case where all the electric wire connecting portions are arranged in a dispersed manner. In some cases, they may be dispersed and provided on the substrate.

In the present invention, the insulating member is not particularly limited as long as it is a material capable of electrically insulating adjacent electric wire connecting portions, and any material can be used.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to the drawings, but the present invention is not limited to the configurations shown in these drawings. In addition, in each figure,
The same reference numerals are given to the same elements in the description of FIG.

FIG. 1 is a plan view, a front view, and a side view showing an example of the structure of a wiring board for a rotary electric machine according to the present invention. In the figure, the wiring board of the present invention is a printed circuit board wiring circuit (hereinafter, also referred to as "circuit section") 2
Wire connection portions (lands) 11, 12, 13, and 14 provided for each of the wires 1, 22, 23, and 24 for connecting wires such as connecting a lead wire to an inter-coil wire are respectively provided on the substrate 10. In the connection board for a rotating electric machine according to the first aspect, the board 10 is mainly a flexible board (claim 1).

In the figure, in the connection board of the present invention, the board 10 has a plurality of tongue-shaped pieces 103, and the lands 11,
12, 13, and 14 may be provided on each tongue-shaped piece 103, and one tongue-shaped piece 103 may be provided with only one land (11 or the like). (Claim 2).

Further, in the figure, the wiring board of the present invention shows the adjacent lands 11 and 12, and lands 12 and 1.
At least one of the adjacent tongue-shaped pieces 103 provided with 3 and the lands 13 and 14 belongs to the annular portion 102 that is a portion of the connection board other than the tongue-shaped pieces 103. The adjacent land 1 is bent so as to be separated from the reference plane.
1 and 12, lands 12 and 13, and lands 13 and 14, respectively, the separation distance is
It can be configured such that it is increased compared to the case where it is not folded (claim 3).

Further, in the figure, the wiring board of the present invention shows the adjacent lands 11 and 12 and lands 12 and 1.
Adjacent tongues 103 provided with 3 and lands 13 and 14, respectively, are bent so as to be spaced apart from the reference plane on opposite sides, so that adjacent lands 11 and 12 are provided. , Lands 12 and 13, and lands 13 and 14,
It can be configured such that the separation distance in each is increased as compared with the case where it is not bent (claim 4).

On the substrate 10, the circuit portions 21, 22,
23 and 24 are arranged, the substrate 10 has a substantially annular shape in which a part is cut out on a concentric circle of the axis of the rotary electric machine, and the circuit portions 21, 22, 23, and Lands 11, 12, 13, and 14 each having a lead wire fixing hole and being a bare conductive portion are provided at the ends of 24, respectively.
Like 3 and 14, the lead wires are fixed by soldering to connect the respective circuit parts 21, 22, 23 and 24 to the power source, which is the same as the conventional wiring board.

[0028]

In FIG. 1, since the wiring board of the present invention is constructed as described above, the circuit parts 21, 22, 23, and 24, and the lands 11 and 1 provided on the respective circuit parts 21, 22, 23, and 24.
2, 13, and 14 can be freely bent due to the flexibility of the flexible substrate (claim 1).

In the figure, in the wiring board of the present invention,
This can be freely bent for each of the tongue pieces 103 provided with only one land (11 etc.), and the tongue pieces 103 are separated from other tongue pieces 103 adjacent to each other. It is also spatially or planarly separated. As a result, adjacent lands have the same three-dimensional position, and
Compared with the case where it is placed in the connection terminal that is not divided,
Adjacent lands are separated from each other with a large clearance and creepage distance (claim 2). That is, the lands 11 and 12, 12 and 13, 13 of each phase which are bare conductive parts
The space distance and the creepage distance between 14 and 14 become long, and the electrical insulation characteristics such as insulation resistance and withstand voltage, which are generally approximately proportional to the distance between the conductive parts, are improved. Since the substrate 10 is a flexible substrate, the tongue-shaped piece 103 can be easily bent.

The lands 11-13, 11-14, 1
Even between 2 and 14, these are arranged at different positions in a plane or three-dimensionally, and are separated with a large space distance and a large creepage distance, and generally have an insulation resistance and a withstand voltage that are approximately proportional to the distance between the conductive portions. It goes without saying that the electrical insulation characteristics such as are secured.

In the wiring board of the present invention, the adjacent lands 1
1 and 12, lands 12 and 13, and at least one of said adjacent tongues 103 provided with lands 13 and 14, respectively, can be folded away from said reference plane, whereby The tongue piece 103 is spatially separated from the other tongue pieces 103 adjacent to each other. Thereby, the adjacent lands 11 and 12, lands 12 and 13,
Further, the distance between the lands 13 and 14 is increased as compared with the case where the lands are not bent, and the adjacent lands are separated from each other with a large spatial distance and creeping distance (claim 3).

As shown in the drawing, the adjacent tongue pieces 1 are provided.
03 can be bent so as to be spaced apart from each other from the reference plane, and the tongue piece 103 is spatially separated from another tongue piece 103 adjacent to each other. Thereby, the adjacent lands 11 and 12, land 1
The separation distance in each of 2 and 13 and the lands 13 and 14 is increased as compared with the case where the lands are not bent, and adjacent lands are separated from each other with a large spatial distance and creepage distance (claim 4). That is, the lands 11 and 12, 1 of each phase, which are bare conductive parts,
Spatial distances and creepage distances between 2 and 13, 13 and 14 become long, and electrical insulation characteristics such as insulation resistance and withstand voltage, which are generally approximately proportional to the distance between conductive parts, are improved. Board 1
Since 0 is a flexible substrate, the tongue piece 103 can be easily bent.

Even between the lands 11 and 14, the lands 11 to 14 are arranged at three-dimensionally different positions, and are separated with a large space distance and a large creepage distance. Generally, the insulation resistance and the resistance are substantially proportional to the distance between the conductive portions. It goes without saying that electrical insulation characteristics such as voltage are secured.

In FIG. 1, the distance between the circuit portions 21, 22, 23, and 24, which are printed wiring circuits, is kept to the minimum necessary length, and the connecting terminals of the rotary electric machine, which are all tongue-shaped pieces 103, are connected. The insulating characteristics are improved without increasing the widthwise dimension of the portion 101.

FIG. 2 is a plan view, a front view and a side view showing an example of using an insulating member for the structure of the wiring board for a rotary electric machine according to the present invention. In the figure, the wiring board of the present invention has a land (11 or the like) on an adjacent tongue piece 103 between adjacent tongue pieces 103 that are bent so as to be separated from each other on the opposite side from the reference plane. An insulating member 50 may be sandwiched between the insulating members 50 to separate them from each other and prevent their contact (Claim 5).

In the present invention in which a flexible substrate is used as the substrate 10, the tongue-like piece portion 103 obtained by dividing the connection terminal portion 101 into the lands (11, etc.) can be easily bent, so that the space between the adjacent lands is increased as described above. It is possible to increase the space distance and creepage distance of the land and improve the electrical insulation between the lands, but depending on the usage conditions, when a thin flexible board is used, the tongue-shaped piece is generated due to external vibration. The vibration of the portion 103 and the contact and short circuit due to the vibration may be expected, and the stability of the insulation property between the lands may be slightly lacking. Therefore, the insulating member 50 is sandwiched in order to fix the separation between the tongue-shaped pieces 103 separated by bending. As a result, the adjacent tongue-shaped pieces 103 that are separated from each other are fixedly separated from each other, vibration, contact due to the vibration, and insulation failure are prevented, and insulation characteristics are further stably maintained.

FIG. 3 is a plan view, a front view and a side view showing another example in which an insulating member is used for the structure of the wiring board for a rotary electric machine according to the present invention. In the figure, the wiring board of the present invention has a land (11 or the like) on an adjacent tongue piece 103 between adjacent tongue pieces 103 that are bent so as to be separated from each other on the opposite side from the reference plane. Not only is it spaced apart to prevent contact, but the land (11) on the tongue 103 on the same side of the reference plane, even if not adjacent, is
Etc.) A partition wall 551 for separating and preventing the contact
The insulating member 55 having the above may be sandwiched (claim 5).

As a result, not only between adjacent tongue-shaped pieces which are spaced apart from each other on different sides of the reference plane, but also between the tongue-shaped pieces located on the same side, the separation is fixed by the partition wall portion 551, Vibration, contact due to it, and insulation failure are prevented, and insulation characteristics are stably maintained. That is, the lands 11 and 12, 12 and 1 of each phase which are bare conductive parts
The spatial distance and creepage distance between 3, 13, and 14 become long, and the electrical insulation characteristics such as insulation resistance and withstand voltage, which are generally approximately proportional to the distance between the conductive parts, are improved. Also, land 1
Even between 1-13, 11-14, and 12-14, the insulating member 55 provided with the partition wall portion 551 provides a stable separation with a large space distance and a large creepage distance. Electrical insulation characteristics such as proportional insulation resistance and withstand voltage are greatly improved.

Moreover, since the insulating distance between the lands 11 and the like is positively secured by providing the partition wall portion 551, the distance between the lands 11 and the like can be further reduced.
It is also possible to downsize the soldering part.

In FIGS. 2 and 3, the distance between the circuit portions 21, 22, 23, and 24, which are printed wiring circuits, is kept to the minimum necessary length, and the tongue-shaped piece portion 103 is used for the rotary electric machine. The insulation characteristics are improved without significantly changing the widthwise dimension of the connection terminal portion.

The lands 11 to 14 can be used as the wiring board of the present invention, in which the ground terminal portion and the lead wire connecting portions for three phases correspond to these. 6).

[0042]

According to the wiring board of the present invention, the required creepage distance or space distance is ensured while keeping the overall dimensions of the wiring board in a compact state, thereby providing electrical insulation between the wire connection portions. It can be fully achieved. Further, it is possible to eliminate the insulation failure caused by the variation of the solder flow in the soldering work.

Further, by sandwiching the insulating member between the tongue-shaped pieces, the insulating property between the lands can be stably maintained, and by using the insulating member having the partition wall, the insulating distance between the lands can be positively maintained. Is secured, the distance between lands can be further reduced, and the soldering portion can be downsized.

[Brief description of drawings]

FIG. 1 shows a structure of a wiring board for a rotating electric machine according to the present invention,
It is the top view, front view, and side view which show the example.

FIG. 2 shows a structure of a wiring board for a rotary electric machine according to the present invention,
It is a top view, a front view, and a side view showing an example using an insulating member.

FIG. 3 is a plan view, a front view, and a side view showing another example using an insulating member in the structure of a conventional wiring board for a rotating electric machine.

FIG. 4 is a plan view, a front view, and a side view showing an example of a structure of a conventional wiring board for a rotary electric machine.

[Explanation of symbols]

10 ... Substrate, 102 ... Annular part, 103 ... Tongue-shaped part,
11, 12, 13, 14 ... Electric wire connecting portion (land),
21, 22, 23, 24 ... Circuit part, 50, 55 ... Insulating member, 551 ... Partition part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuru Kimura             Aomori Prefecture Hachinohe City North Inter Industrial Complex 1-3             No. 47 Tamagawa Seiki Co., Ltd.Hachinohe Office (72) Inventor Kazumi Jun             Aomori Prefecture Hachinohe City North Inter Industrial Complex 1-3             No. 47 Tamagawa Seiki Co., Ltd.Hachinohe Office F-term (reference) 5H604 AA05 AA08 BB01 BB09 BB17                       CC01 CC05 CC13 CC16 QB04                       QB14

Claims (6)

[Claims] 1. A wiring board for a rotating electric machine, comprising: a wire connecting portion, which is provided for each circuit portion, for connecting an electric wire such as connecting a lead wire to a coil connecting wire on a substrate.
A wiring board for a rotating electric machine, wherein the board is a flexible board. 2. The substrate has a plurality of tongue pieces, the wire connecting portion is provided on the tongue piece, and one tongue piece has only one wire connecting portion. The connection board for a rotary electric machine according to claim 1, wherein the connection board is provided. 3. At least one of the adjacent tongue pieces provided with the adjacent electric wire connecting portions, respectively,
The distance between the adjacent electric wire connection portions is increased by being bent so as to be separated from a reference plane to which at least a portion other than the tongue-shaped piece portion of the connection board belongs. Item 2. A wiring board for a rotating electric machine according to Item 2. 4. The adjacent electric wire connecting portions are provided by bending the adjacent tongue pieces provided with the adjacent electric wire connecting portions so as to be spaced apart from each other from the reference plane. The connection board for a rotary electric machine according to claim 3, wherein the distance between the two is increased. 5. The insulating member is sandwiched between adjacent tongue pieces that are bent so as to be spaced apart from each other on the opposite side from the reference plane. A wiring board for a rotating electric machine according to [1]. 6. The wiring board for a rotating electric machine according to claim 1, wherein the electric wire connecting portion includes a ground terminal portion and lead wire connecting portions for three phases.