JPH10336936A - Stator of motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to reduce the size of a printed board and eliminate a job of fixing an insulating coating material to a common coil terminal connection, by supporting the common coil terminal connection by inserting it into a hole formed in the printed board. SOLUTION: A common coil terminal connection 10 is supported by being inserted into one hole 12 formed in a printed board 4. By this method, there is no necessity of making a plurality of holes in the printed board 4 for supporting common coil terminals 5a, thereby increasing an effective area of the printed board 4 increases and reducing the size of the printed board 4. Furthermore, a job of fixing an insulating coating material to the common coil terminal connection 10 can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of a motor in which a printed circuit board is fixed to a stator core of a stator body via an insulating spacer, and more particularly to a common coil connected to each other in a stator coil wound around the stator core. The present invention relates to an improvement in a support structure of a connection portion of a terminal.

[0002]

2. Description of the Related Art FIGS. 3A, 3B and 4 show an example of a conventional stator of this type of motor. The stator of the electric motor is a stator core 2 of the stator body 1.
The printed circuit board 4 is fixed via an insulating spacer 3. The stator body 1 includes a stator core 2
The stator coil 5 is wound around each salient pole portion. The insulating spacer 3 is fixed to the stator core 2 by bonding or the like. A plurality of protrusions 3b are provided in the circumferential direction on the end surface 3a of the insulating spacer 3 on the side facing the printed circuit board 4. The printed circuit board 4 is in contact with each protrusion 3 b of the insulating spacer 3 and is fixed with screws 6.
The printed circuit board 4 has mounted thereon electronic components 7 for controlling the energization of the stator coil 5 and the like.

[0003] On the end face 3a of the insulating spacer 3, three conductor pins 8 are protruded toward the printed circuit board 4 with a length protruding ahead of each protruding portion 3b. The common coil terminals 5a to be connected to each other are connected to the conductor pins 8 by star connection of the stator coils 5 and connected by soldering or the like. The tip of each conductor pin 8 penetrates at the common coil terminal connection land 9 of the printed circuit board 4 and is connected to the common coil terminal connection land 9 by a soldering portion 10a. They are mutually connected by a common coil terminal connection land portion 9.

However, in the conventional electric motor stator having such a structure, the printed circuit board 4 is provided with the common coil terminal connection land portion 9 in a length corresponding to the conductor pins 8, and the common coil terminal connection land is provided. It is necessary to provide holes in the printed circuit board 4 at the lands 9 so as to penetrate the respective conductor pins 8, which is disadvantageous in terms of space when mounting the electronic components 7 or the like on the printed circuit board 4 or forming a circuit pattern. Therefore, there is a problem that hinders downsizing of the printed circuit board 4.

[0005] As a stator for an electric motor which avoids such problems, those having a structure shown in Figs. 5A, 5B and 6 have been proposed.

In the stator of this electric motor, a common coil terminal 5a to be connected to each of the stator coils 5 is provided.
Are mutually twisted between the stator main body 1 and the printed circuit board 4 and connected by soldering, so that the common coil terminal connecting portion 1
0 is formed. The common coil terminal connecting portion 10 has an insulating coating 11 such as an insulating tube for insulation protection.
Is covered and fixed with an adhesive or the like.

In the case of the stator of the electric motor having such a structure, the common coil terminal connection land 9 is provided on the printed board 4, and each conductor pin is provided on the printed board 4 at the common coil terminal connection land 9. There is no need to provide a hole through which the printed circuit board 8 penetrates, which is advantageous in terms of space, and the printed circuit board 4 can be reduced in size.

[0008]

However, FIG.
(A), (B) and the motor stator having the structure shown in FIG.
It is necessary to manually perform the coating fixing operation of No. 1 and there is a problem that the number of steps increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stator for an electric motor that can reduce the size of a printed circuit board and can omit the work of fixing an insulating coating to a terminal portion of a common coil.

Another object of the present invention is to provide a motor stator that can increase the effective area of a printed circuit board.

[0011]

According to the present invention, a printed circuit board is fixed to a stator core of a stator body via an insulating spacer, and common coil terminals to be connected to each other of the coils wound around the stator core are mutually connected. An object of the present invention is to improve a stator of an electric motor connected to form a common coil terminal connection portion.

In the present invention, the common coil terminal connecting portion is inserted into and supported by the hole of the printed circuit board. In this case, it is preferable that the common coil terminal connecting portion is formed by twisting and connecting the common coil terminals of the respective stator coils which are connected to each other with each other by soldering.

[0013] When the common coil terminal connecting portion is inserted and supported in the hole of the printed circuit board as described above, it is possible to omit the work of fixing the insulating coating to the common coil terminal connecting portion. Further, when the common coil terminal connection portion is inserted and supported in one hole of the printed circuit board, it is not necessary to provide a plurality of holes for supporting the common coil terminal on the printed circuit board, and the effective area of the printed circuit board is reduced. Can be increased. Further, a pin for winding the common coil terminal is not required, and the number of components can be reduced.

Further, in the present invention, the common coil terminal connecting portion is inserted into the hole of the printed circuit board, and is soldered and supported on the land portion of the printed circuit board. In this case, the common coil terminal connecting portion may be formed by simply twisting the mutually connected common coil terminals of the respective stator coils, or by connecting the mutually connected common coil terminals. They may be formed by being connected to each other by soldering.

As described above, when the common coil terminal connection portion is inserted into the hole of the printed circuit board and is supported by being soldered to the land portion of the printed circuit board, the common coil terminal connection portion is reliably supported by the printed circuit board. be able to.

[0016]

1 (A) and 1 (B) show a first example of an embodiment of the present invention which can be mounted on a stator of an electric motor according to the present invention. Parts corresponding to those in FIGS. 3 to 6 are denoted by the same reference numerals.

In the stator of this electric motor, the common coil terminals 5a of the respective stator coils 5 wound around the stator core 2 to be connected to each other are twisted and soldered to each other, so that the common coil terminal connecting portion 10 is formed. Is formed. The common coil terminal connection portion 10 is inserted into and supported by one hole 12 provided in the printed circuit board 4.

When the common coil terminal connecting portion 10 is inserted and supported in the hole 12 of the printed circuit board 4 as described above, the work of coating and fixing the insulating coating to the common coil terminal connecting portion 10 can be omitted. Further, when the common coil terminal connecting portion 10 is inserted and supported in one hole 12 of the printed circuit board 4, it is not necessary to provide a plurality of holes for supporting the common coil terminal 5a on the printed circuit board 4. The effective area of the substrate 4 can be increased. Further, a pin for winding the common coil terminal 5a is not required, and the number of components can be reduced.

FIGS. 2A and 2B show a second example of the embodiment of the present invention which can be mounted on the stator of the electric motor according to the present invention. Note that parts corresponding to those in FIGS. 1A and 1B are denoted by the same reference numerals.

In the stator of this electric motor, the common coil terminals 5a of the respective stator coils 5 wound around the stator core 2 to be connected to each other are twisted and soldered to each other to form a common coil terminal connecting portion 10a. Are formed. The common coil terminal connecting portion 10 is inserted into a hole 12 of the printed circuit board 4 and is supported by soldering 14 to a land portion 13 of the printed circuit board 4.

As described above, the common coil terminal connecting portion 10 is inserted into the hole 12 of the printed circuit board 4 so that the printed circuit board 4
In this case, the work of fixing the insulating coating to the common coil terminal connecting portion 10 can be omitted. Further, when the common coil terminal connecting portion 10 is inserted into and supported by one hole 12 of the printed circuit board 4, it is not necessary to provide a plurality of holes for supporting the common coil terminal 5a on the printed circuit board 4. The effective area of the substrate 4 can be increased. Further, a pin for winding the common coil terminal 5a is not required, and the number of components can be reduced. In particular, when the common coil terminal connecting portion 10 is inserted into one hole 12 of the printed circuit board 4 and is supported by being soldered 14 to the land portion 13 of the printed circuit board 4, the printed circuit board of the common coil terminal connecting portion 10 4, the common coil terminal connecting portion 10 can be stably supported on the printed circuit board 4. In this case, the common coil terminal connecting portion 10 before being inserted into the hole 12 may be formed simply by twisting.

[0022]

According to the present invention, since the common coil terminal connection is inserted and supported in the hole of the printed circuit board, the work of fixing the insulating coating to the common coil terminal connection can be omitted. Further, since the common coil terminal connection portion is inserted and supported in one hole of the printed circuit board, it is not necessary to provide a plurality of holes for supporting the common coil terminal on the printed circuit board, and the effective area of the printed circuit board is reduced. Can be increased. Further, a pin for winding the common coil terminal is not required, and the number of components can be reduced.

[Brief description of the drawings]

FIG. 1A is a side view showing a first example of an embodiment of a motor stator according to the present invention, and FIG. 1B is a front view of a main part of the motor stator of the present example viewed from a printed circuit board side. is there.

FIG. 2A is a side view showing a second example of an embodiment of a motor stator according to the present invention, and FIG. 2B is a main part front view of the motor stator of the present example viewed from a printed circuit board side. is there.

FIG. 3 (A) is a side view of an example of a conventional motor stator, and FIG. 3 (B) is a main part front view of the motor stator viewed from a printed circuit board side.

FIG. 4 is a front view of one half of the stator shown in FIG. 3 with a printed circuit board removed.

FIG. 5A is a side view of another example of a conventional motor stator, and FIG. 5B is a main part front view of the motor stator viewed from a printed circuit board side.

6 is a front view of one half in a state where a printed circuit board is removed from the stator shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator main body 2 Stator core 3 Insulating spacer 3a End surface 3b Projection 3c Projection 4 Printed circuit board 5 Stator coil 5a Common coil terminal 6 Screw 7 Electronic component 8 Conductor pin 9 Common coil terminal connection land 10a Solder 10 Common coil terminal connection Part 11 Insulation coating 12 Hole 13 Land part 14 Solder

Claims (2)

[Claims] 1. A printed circuit board is fixed to a stator core of a stator body via an insulating spacer, and common coil terminals to be connected to each other of coils wound around the stator core are connected to each other to connect a common coil terminal. A stator for an electric motor in which a portion is formed, wherein the common coil terminal connecting portion is inserted and supported in a hole of the printed circuit board. 2. A printed circuit board is fixed to a stator core of a stator body via insulating spacers. Common coil terminals connected to each other of the coils wound around the stator core are connected to each other, and a common coil terminal connecting portion is formed. A stator for an electric motor, wherein the common coil terminal connecting portion is inserted into a hole of the printed circuit board and is soldered and supported on a land portion of the printed circuit board.