JPH1169723A - Motor having built-in wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor having a built-in wiring board in which the reliability of electric conduction is enhanced while decreasing the number of parts and reducing the labor for manufacture. SOLUTION: Insertion holes 39, 41, 42 are made through a wiring board 26, printed wiring 44 and connection lands 45, 46 are formed on the part surface 43 and printed wiring 44 is formed on the solder surface 47 along with a land 49. A pin 27 projects to the part surface 43 side and connected mechanically and electrically through the land 45 and a solder 51. Forward ends of a jumper wire 40 are bent into the insertion holes 41, 42 and coupled mechanically with the wiring board 26 and one end of the jumper wire 40 is soldered 52 to the land 46 on the printed wiring 44 identical to the land 45 on the part surface 43 side of the insertion hole 39. The other end of the jumper wire 40 to be inserted into the insertion hole 42 is soldered 53 to the land 49 on the solder surface 47 side of the wiring board 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor having a built-in wiring board.

[0002]

2. Description of the Related Art Various motors such as a motor mounted on an engine and a motor for moving a wiper are mounted on automobiles such as passenger cars and trucks. Some of such motors have a built-in wiring board. Such a wiring board is equipped with circuit elements such as a circuit element for transmitting a drive signal from a control device outside the motor to the coil of the motor to drive the motor and a detection element for detecting the rotation state of the motor. Have been.

FIG. 7 is a sectional view showing the vicinity of a wiring board of a conventional motor with a built-in wiring board (hereinafter referred to as a motor), and FIG. 8 is a perspective view of a connecting plate-shaped terminal used in the prior art.
On one surface of a wiring board 1 provided in the motor, printed wiring 2 is formed in a predetermined pattern, and a part thereof is formed as a connection land 3. An insertion hole 4 is formed in a portion of the wiring board 1 corresponding to the land 3, and a metal pin 7 around which one end of a coil 6 of a motor stator is inserted is inserted in another portion. A hole 5 is formed. The land is not formed around the insertion hole 5. One end of the coil 6 is fixed to a pin 7 with solder 8.

A plate terminal 9 shown in FIG. 8 is used to electrically connect the pin 7 to the printed wiring 2. The plate-like terminal 9 includes a substantially rectangular plate-like portion 10 and a plate-like portion 10.
And a pair of leg portions 11 integrally formed at one end of the leg. The pair of legs 11 are bent and inserted into the insertion holes 4 to penetrate as shown in FIG. Leg 11
The portion protruding through the wiring board 1 is fixed to the land 3 by solder 12 and is electrically conducted.

On the other hand, an insertion hole 13 is punched and formed in the plate-shaped portion 10. The plate-like terminal 9 is positioned and mounted on the wiring board 1 such that the insertion hole 13 is located at the same position as the insertion hole 5 of the wiring board 1. The pin 7 is inserted through the insertion hole 5 of the wiring board 1 and the insertion hole 13 of the plate terminal 9 in a state where the plate terminal 9 is mounted, and the portion protruding from the insertion hole 13 is connected to the plate terminal 9 with solder 15. It is fixed and electrically conducted.

In this way, a driving current is supplied to the coil 6 via the printed wiring 2, the plate-like terminal 9, and the pin 7.

[0007]

The above prior art has the following problems.

It is difficult to mount the plate terminal 9 on the wiring board 1 by positioning the insertion holes 5 and 13 with high precision so that the pins 7 can be easily inserted. Cost.

When the pins 7 and the plate terminals 9 are soldered with the solder 15, the solder 1 already soldered by the heat of the soldering is used.
2 may be melted, the connection of the plate-shaped terminals 9 becomes uncertain, and the terminals may fall off.

[0010] In order to electrically connect the pins 7 to the printed wiring 3, it is necessary to use the plate-like terminals 9, which increases the number of parts and increases the cost.

As a conventional technique for preventing the use of such a plate-like terminal 9, the inner periphery of the insertion holes 4, 5 and the periphery of the insertion holes 4, 5 on both sides of the wiring board 1 are formed by integral metal plating. Forming techniques are known. Such a metal plating technique in the prior art requires many man-hours and increases the cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to improve the reliability of electrical conduction, and reduce the number of parts and the number of manufacturing steps. An object of the present invention is to provide a motor with a built-in wiring board.

[0013]

According to a first aspect of the present invention, there is provided a motor with a built-in wiring board comprising a plurality of insertion holes through which conductors are inserted, and lands to which the conductors are connected around the respective insertion holes on both surfaces. And a printed circuit board on which a printed wiring is formed. One end of a connection conductor electrically connected to the motor coil is inserted into the first insertion hole of the wiring board, and
A second insertion hole is formed near the insertion hole. The lands in the first insertion hole and the second insertion hole are connected to each other by printed wiring. One end of the jumper wire is bent and mounted in the second insertion hole, and the other end of the jumper wire is bent and mounted in the third insertion hole and connected to another printed wiring. In this way, one end of the coil and the jumper wire are electrically connected.

In the present invention, in order to electrically connect the coil of the motor and the printed wiring, there is provided an insertion hole through which a connection conductor is inserted together with the first insertion hole. The necessity of using the connection member to be positioned is eliminated, and the man-hour required for the positioning is reduced.

Since both ends of the jumper wire are bent and mounted in the insertion holes, even when soldering to the jumper wire, compared to when the jumper wire is fixed to the wiring board by soldering, It is possible to prevent a situation in which the mounting strength of the jumper wire is reduced by heat at the time of soldering, and it is possible to improve the reliability of electrical conduction.

Further, the jumper wire used is merely a wire, and the entire manufacturing process including the manufacturing process of parts can be reduced as compared with the case where a connecting member having a special configuration is used.

In the present invention, the jumper wire may be connected to lands around the second insertion hole and the third insertion hole near both ends by soldering. Even in such a case,
Since both ends of the jumper wire are bent and attached to the second insertion hole and the third insertion hole, the heat generated when soldering is compared with the case where the jumper wire is fixed to the wiring board by soldering. Accordingly, it is possible to prevent a situation where the mounting strength of the jumper wire is reduced.

In the present invention, lands formed on both surface sides of the insertion hole may be electrically connected to each other by the jumper wire. Even in such a case, according to the present invention, the lands on both sides of the wiring board can be electrically connected by the jumper wire, so that the inner circumference of the insertion hole and
This eliminates the need to use a through-hole plating technique in which the periphery of the through-holes on both sides of the wiring board and the periphery of the through-holes are formed by integral metal plating, thereby reducing manufacturing man-hours and cost.

In the present invention, both ends of the jumper wire may be connected to corresponding lands on one side surface and the other side surface of the wiring board by solder. Even in such a case, the same operation and effect as the above-described operation and effect can be realized.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. FIGS. 4 and 5 show FIGS.
It is a figure showing a 4th example. FIG. 1 shows a motor 2 of this embodiment.
1 is a cross-sectional view showing the vicinity of a wiring board 22 built in 1 and viewed from a section line X1-X1 in FIG. 2, FIG. 2 is a plan view of the wiring board 21, and FIG. 4 is a sectional view corresponding to FIG. 1 of the second embodiment, FIG. 5 is a sectional view corresponding to FIG. 1 of the third embodiment, and FIG. 6 is a fourth embodiment. 2 is a sectional view corresponding to FIG.

(First Embodiment) Hereinafter, referring to FIG.
The configuration of the motor 21 will be described. The motor 21 is, for example, a U-phase, V-phase, and W-phase three-phase motor. Motor 2
A stator 24 on which a plurality of coils 23 are mounted and a rotor 25 are arranged in one casing 22, and a wiring board 26 having a configuration described later is arranged on the left side of the stator 24 in FIG. One end of the coil 23 is wound around a connection pin 27 to form a connection portion 28. The casing 22 is covered by a cover plate 29. The rotating shaft 30 fixed to the rotor 25 is rotatably supported by bearings 31 and 32 provided inside the casing 22.
Further, ring-shaped cushion rubbers 33 and 34 are mounted on the outer periphery of both ends in the axial direction of the casing 22. The wiring board 26 is connected to a lead wire 35, and a driving current is supplied from an external control device (not shown).

Referring to FIGS. 1 and 2, a structure related to the wiring board 26 will be described. As shown in FIG. 2, an insertion hole 36 through which the rotating shaft 30 is inserted is formed in the wiring board 26. On one surface of the wiring board 26, as shown in FIG. 1, a ground wiring 37 is formed almost entirely with copper foil or the like, and a circuit element 38 is mounted. The wiring board 26 has an insertion hole 39 which is a first insertion hole through which the pin 27 around which the connection portion 28 of the coil 23 of the motor 21 is wound is inserted.
In the vicinity of the insertion hole 39, a jumper wire 40 described later is provided.
Are formed as insertion holes 41 and 42, which are a second insertion hole and a third insertion hole through which both ends are inserted. Wiring board 2
6, a printed wiring 44 is formed in a predetermined pattern on a surface (hereinafter referred to as a component surface) 43 on which the circuit element 38 is mounted. Lands 45 and 46 are formed. A printed wiring 48 is formed in a predetermined pattern on a surface (hereinafter referred to as a solder surface) 47 of the wiring board 26 opposite to the component surface 43, and a land 4 is formed around the insertion hole 42 of the printed wiring 48.
9 are formed.

The pins 27 penetrate the wiring board 26 and protrude toward the component surface 43, and the protruding portions 50 are mechanically and electrically connected to the lands 45 by solders 51. On the other hand, both ends of the above-described jumper wire 40 are inserted into the insertion holes 41 and 42, and the ends thereof are bent and mechanically connected to the wiring board 26. Component side 4 of insertion hole 39
Land 46 on the same printed wiring 44 as land 45 on the third side
1 and one end of the jumper wire 40 are soldered with solder 52 as shown in FIG. 1, and the other end inserted into the insertion hole 42 of the jumper wire 40 is connected to a land 49 on the solder surface 47 side of the wiring board 26. And solder 53.

Hereinafter, a process of attaching the jumper wires 40 to the wiring board 26 will be described. Printed wiring 4 described above
Wiring board 26 formed with predetermined patterns 4, 48
Next, the jumper wire 40 is mounted by an automatic mounting machine as an example. At this time, insert both ends of the jumper wire 40 into the insertion holes 41, 4
2 and a process of bending the both ends by clinching. As a result, the jumper wire 40 is connected to the wiring board 2 before soldering the solders 52, 53 and the like.
6 is mechanically fixed. Next, the solder 53 is soldered on the solder surface 47 of the wiring board 26.

On the other hand, in a separate step, the connecting portion 28 of the coil 23 is wound around the pin 27 and soldered with solder 54. The pins 27 to which the connecting portions 28 are soldered are inserted into the insertion holes 39 of the wiring board 26, and the solders 51 and 52 are soldered at once by spot soldering or the like. Hereinafter, the stator 24, the rotor 25, etc.
2 and the motor 21 including the wiring board 26 is assembled.

In this embodiment, the coil 2 of the motor 21
In order to electrically connect the printed wirings 3 and the printed wirings 44 and 48 of the wiring board 26, the necessity of using the plate-like terminal 9 having a relatively complicated configuration described with reference to FIG. . Accordingly, as described in the related art, a step of positioning the plate-like terminal 9 in the insertion hole of the wiring board into which the pin is inserted with high accuracy becomes unnecessary, and the number of manufacturing steps and the number of parts can be reduced. .

On the other hand, since both ends of the jumper wire 40 are bent and mounted in the insertion holes 41 and 42, when the solders 51 and 52 are soldered to the jumper wire 40, the jumper wire 40 is connected to the wiring board. As compared with the case where the fixing is performed only by soldering, it is possible to prevent a situation in which the mounting strength of the jumper wire 40 is reduced due to heat during soldering, and it is possible to improve the reliability of electrical conduction. . Specifically, even if the solders 52 and 53 are softened by the heat generated when the solders 51 and 52 are soldered, the situation where the jumper wires 40 float or fall off the wiring board 40 is prevented.

Further, the jumper wire 40 used is merely a wire, and compared with the case where a connecting member having a special configuration such as the plate-like terminal 9 is used, the entire manufacturing process including the manufacturing process of parts is performed. Can be reduced.

In this embodiment, the jumper wire 40 is connected to the component surfaces 43 of the insertion holes 41 and 42 near both ends thereof.
Of the solder 52 on the land 46 of the
53 are respectively connected. Therefore, the wiring board 26
When electrically connecting the lands 46 and 49 on both sides,
The inner peripheries of the insertion holes 41 and 42 and both surfaces 43 and
The necessity of using a through-hole plating technique for forming the periphery of the 47 insertion holes 41 and 42 by integral metal plating is eliminated, so that the number of manufacturing steps can be reduced and the cost can be reduced.

As shown in FIG. 1, the jumper wire 40 is curved on the component surface 43 side of the wiring board 26 and
It will be floating from 6. At this time, jumper wire 4
If spot solder is formed in the vicinity of the center portion of the wire 0 for conduction with the printed wiring 44, the electrical conduction between the jumper wire 40 and the printed wiring 44 may become uncertain due to the floating of the jumper wire 40. is assumed. In order to prevent such a problem, there is a technique in which the mounted jumper wire 40 is preliminarily shaped so as to be in close contact with the wiring board 26, or the mounted jumper wire 40 is pressed in close contact with the wiring board 26. Will be needed. On the other hand, in this embodiment, since soldering is performed near both ends of the jumper wire 40, a step of molding the jumper wire 40 in advance and pressing after mounting is not required. Man-hours can be reduced.

In this embodiment, both ends of the jumper wire 40 are connected to the lands 4 on both surfaces 43 and 47 of the wiring board 26.
6 and 49 are connected by solders 52 and 53, respectively, so that the length of the jumper wire 40 between the lands 46 and 49 can be increased. Accordingly, even if a heat cycle in which high and low temperatures are repeatedly applied to the jumper wire 40 due to a later soldering process or the like, solder cracks are less likely to occur, and the reliability of mechanical and electrical connections is significantly improved. Be improved.

(Second Embodiment) Hereinafter, referring to FIG.
A second embodiment of the present invention will be described.

This embodiment is similar to the first embodiment, and corresponding parts are denoted by the same reference numerals.

This embodiment is characterized in that in the first embodiment,
Connect both ends of the jumper wire 40 to both sides 43, 4 of the wiring board 26.
7, solders 52 and 53 are attached to the lands 46 and 49, respectively.
A land 55 is formed around the insertion hole 41 in the solder surface 47 of the wiring board 26, and both ends of the jumper wire 40 are connected to the solders 53, 56 by the lands 49, 55.
In addition, spot solder 57 is formed near the center of the jumper wire 40 in order to realize conduction between the printed wiring 44 on the component surface 43 side of the wiring board 26 and the jumper wire 40. It is.

In this embodiment, it is apparent that the same operation and effect as those described in the first embodiment are realized.

(Third Embodiment) Hereinafter, referring to FIG.
A third embodiment of the present invention will be described.

This embodiment is similar to the second embodiment, and corresponding parts are denoted by the same reference numerals. The feature of this embodiment is that, in the second embodiment, lands 55 are formed around the insertion holes 41 in the solder surface 47 of the wiring board 26, and both ends of the jumper wire 40 are connected to the solders 53, 5 by the lands 49, 55.
6, and a spot solder 57 is formed near the center of the jumper wire 40 in order to realize conduction between the printed wiring 44 on the component surface 43 side of the wiring board 26 and the jumper wire 40. In contrast to the configuration, a land 58 is formed around the insertion hole 42 on the component surface 43 of the wiring board 26,
Connect both ends of the jumper wire 40 to both sides 43, 4 of the wiring board 26.
7 are connected by solders 52, 53, 55 and 59 at four places around the insertion holes 41 and 42, respectively. Further, in order to realize continuity between the printed wiring 44 on the component surface 43 side of the wiring board 26 and the jumper wire 40, the jumper wire 40
The spot solder 57 is formed in the vicinity of the central portion of FIG.

In this embodiment, it is apparent that the same operation and effect as those described in the first embodiment are realized.

(Fourth Embodiment) Hereinafter, referring to FIG.
A third embodiment of the present invention will be described.

This embodiment is similar to the second and third embodiments, and corresponding parts are denoted by the same reference numerals. The feature of this embodiment is that the spot solder 57 is not formed in the third embodiment.

In this embodiment, it is apparent that the same operation and effect as those described in the first embodiment are realized.

[0042]

As described above, according to the motor with the built-in wiring board of the present invention, one end of the connection conductor electrically connected to the coil of the motor is inserted into the first insertion hole of the wiring board. A second insertion hole is formed near the insertion hole. First
The lands in the insertion hole and the second insertion hole are mutually connected by printed wiring. One end of the jumper wire is bent and mounted in the second insertion hole, and the other end of the jumper wire is bent and mounted in the third insertion hole and connected to another printed wiring. In this way, one end of the coil and the jumper wire are electrically connected.

In the present invention as described above, in order to electrically connect the coil of the motor and the printed wiring, there is provided an insertion hole through which a connection conductor is inserted together with the first insertion hole. The necessity of using the connection member to be positioned is eliminated, and the man-hour required for the positioning is reduced.

Since both ends of the jumper wire are bent and mounted in the insertion holes, even when soldering to the jumper wire, compared to when the jumper wire is fixed to the wiring board by soldering, It is possible to prevent a situation in which the mounting strength of the jumper wire is reduced by heat at the time of soldering, and it is possible to improve the reliability of electrical conduction.

Further, the jumper wire used is merely a wire, and the entire manufacturing process including the manufacturing process of parts can be reduced as compared with the case where a connecting member having a special configuration is used.

In the present invention, the jumper wire may be connected to the lands around the second insertion hole and the third insertion hole near both ends by soldering. Even in such a case,
Since both ends of the jumper wire are bent and attached to the second insertion hole and the third insertion hole, the heat generated when soldering is compared with the case where the jumper wire is fixed to the wiring board by soldering. Accordingly, it is possible to prevent a situation where the mounting strength of the jumper wire is reduced.

In the present invention, the lands formed on both surface sides of the insertion hole may be electrically connected to each other by the jumper wire. Even in such a case, according to the present invention, the lands on both sides of the wiring board can be electrically connected by the jumper wire, so that the inner circumference of the insertion hole and
This eliminates the need to use a through-hole plating technique in which the periphery of the through-holes on both sides of the wiring board and the periphery of the through-holes are formed by integral metal plating, thereby reducing manufacturing man-hours and cost.

In the present invention, both ends of the jumper wire may be connected by solder to corresponding lands on one surface and the other surface of the wiring board. Even in such a case, the same operation and effect as the above-described operation and effect can be realized.

[Brief description of the drawings]

FIG. 1 is a sectional view of the vicinity of a wiring board 22 built in a motor 21 according to a first embodiment.

FIG. 2 is a plan view of a wiring board 21 of the present embodiment.

FIG. 3 is a longitudinal sectional view of the motor 21 of the present embodiment.

FIG. 4 is a cross-sectional view corresponding to FIG. 1 of a second embodiment.

FIG. 5 is a sectional view corresponding to FIG. 1 of a third embodiment.

FIG. 6 is a sectional view corresponding to FIG. 1 of a fourth embodiment.

FIG. 7 is a cross-sectional view of the vicinity of a wiring board of a conventional motor with a built-in wiring board.

FIG. 8 is a perspective view of a connecting plate terminal used in the conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Motor 23 Coil 26 Wiring board 27 Pin for connection 28 Connecting part 37 Grounding wire 39, 41, 42 Insertion hole 40 Jumper wire 43 Component surface 44, 48 Print wiring 45, 46, 49 Land 47 Solder surface 51, 52, 53 , 56,57,59 solder

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshihiro Naito 13-10 Ekimaecho, Obama-shi, Fukui Prefecture Inside the Shibaura Works Obama Plant (72) Inventor Kenichi Moizumi 13-10, Ekimae-cho, Obama-shi, Fukui Prefecture Shares Shibaura Works, Obama Plant

Claims (4)

[Claims] 1. A motor incorporating a printed circuit board including a plurality of insertion holes through which conductors are inserted, and printed wiring including lands to which the conductors are connected around each of the insertion holes on both surfaces. In the wiring board, one end of the jumper wire is bent and attached to the second insertion hole formed near the first insertion hole through which one end of the connection conductor electrically connected to the coil of the motor is inserted. The respective lands in the first insertion hole and the second insertion hole are mutually connected by printed wiring, and the other end of the jumper wire is inserted through the third insertion hole, bent and mounted, and connected to another printed wiring. A wiring board built-in motor in which one end of the coil and the jumper wire are electrically connected. 2. A motor with a built-in wiring board according to claim 1, wherein said jumper wire is connected to lands around the second insertion hole and the third insertion hole by solder near both ends thereof. 3. A motor with a built-in wiring board according to claim 1, wherein lands formed on both surface sides of said insertion hole are electrically connected to each other by said jumper wire. 4. A motor with a built-in wiring board according to claim 1, wherein both ends of the jumper wire are connected to corresponding lands by solder on one surface and the other surface of the wiring board.