CN209516840U - Motor - Google Patents

Abstract

A motor comprising: a rotor rotating around a central axis extending up and down; a stator disposed radially inside the rotor; a substrate disposed axially below the stator; and at least one lead wire connected to the The substrate is electrically connected. The base plate has a main body facing the stator in the axial direction, and a protrusion extending radially outward from the outer peripheral portion of the main body. One end of the lead wire is disposed on the protrusion. At least a portion of one end side of the lead wire and at least a portion of the protruding portion are fixed together by a bonding member.

Description

motor

technical field

The utility model relates to a motor.

Background technique

A conventional electronic device mounted with a printed circuit board is disclosed in JP 2001-148549 A. Japanese Patent Application Laid-Open No. 2001-148549 discloses a camera as an example of an electronic device on which a printed circuit board is mounted. The camera has a main substrate and leads. Leads extend from the battery power contacts and are soldered to the main substrate.

In the conventional camera disclosed in Japanese Patent Application Laid-Open No. 2001-148549, the leads are bent toward the inside of the camera at the outer edge portion of the main substrate in the vicinity of the soldered portion. Therefore, in this conventional camera, stress tends to concentrate on the soldered portion of the lead wire.

Utility model content

In view of the circumstances described above, an object of the present invention is to provide a motor capable of improving the holding force of a lead wire with respect to a substrate.

The exemplary motor of the present utility model has: a rotor, which rotates around a central axis extending up and down; a stator, which is arranged on the radially inner side of the rotor; a substrate, which is arranged on the axially lower side of the stator; and at least one lead wire, It is electrically connected with the substrate. The base plate has a main body facing the stator in the axial direction, and a protrusion extending radially outward from the outer peripheral portion of the main body. One end of the lead wire is disposed on the protrusion. At least a portion of one end side of the lead wire and at least a portion of the protruding portion are fixed together by a bonding member.

In the above-described embodiments, the joining member is a tube. Lead wires and protrusions are accommodated in the tube.

In the above embodiment, the motor has a plurality of the lead wires. The substrate has a plurality of land portions electrically connected to the plurality of leads, respectively. The first land portion electrically connected to one of the first lead wires among the plurality of leads is disposed radially outward of the other land portions.

In the above-described embodiment, the substrate has a connection portion in which the pad portion is connected to the lead. The connecting portion is covered with an adhesive.

In the above embodiment, the protruding portion has a first protruding portion and a second protruding portion. The first protrusion extends radially outward from the outer peripheral portion of the main body. The second protrusion extends radially outward from the outer peripheral portion of the first protrusion. The width of the second protrusion in the direction perpendicular to the extending direction is smaller than the width of the first protrusion in the direction perpendicular to the extending direction. The first lead is arranged on the second protrusion. The first lead and the second protrusion are fixed together by the bonding member.

In the above embodiment, the radially outer end of the first pad portion is at the same radial position as the radially outer end of the first protruding portion, or the radially outer end of the first pad portion is located The radially outward position of the outward end.

In the above-mentioned embodiment, the motor has the second lead wire and the third lead wire arranged on the first protruding portion. The first lead is arranged between the second lead and the third lead in the width direction perpendicular to the extending direction of the protrusion.

In the above embodiments, the first leads, the second leads and the third leads are arranged in two layers up and down the axial direction.

In the above-described embodiment, the width of the second protrusion in the direction perpendicular to the extending direction is less than three times the diameter of the lead wire.

According to the exemplary motor of the present invention, it is possible to improve the holding force of the lead wire with respect to the substrate.

The above and other features, elements, steps, features and advantages of the present invention can be more clearly understood from the following detailed description of preferred embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a side view of a motor according to a first embodiment of the present invention.

Fig. 2 is a plan view of the motor according to the first embodiment of the present invention.

3 is a longitudinal end view showing part of a coupling member of the motor according to the first embodiment of the present invention.

4 is a plan view of a substrate of the motor according to the first embodiment of the present invention.

5 is a longitudinal end view showing part of a coupling member of a motor according to a first modified example of the first embodiment of the present invention.

6 is a longitudinal end view showing part of a coupling member of a motor according to a second modified example of the first embodiment of the present invention.

7 is a longitudinal end view showing part of a coupling member of a motor according to a third modified example of the first embodiment of the present invention.

8 is a longitudinal end view showing part of a coupling member of a motor according to a fourth modified example of the first embodiment of the present invention.

9 is a longitudinal end view showing part of a coupling member of a motor according to a fifth modified example of the first embodiment of the present invention.

10 is a plan view of a substrate of a motor according to a sixth modified example of the first embodiment of the present invention.

Fig. 11 is a plan view of a motor according to a second embodiment of the present invention.

12 is a longitudinal end view showing part of a coupling member of a motor according to a second embodiment of the present invention.

13 is a plan view of a substrate of a motor according to a second embodiment of the present invention.

14 is a longitudinal end view showing part of a coupling member of a motor according to a seventh modified example of the second embodiment of the present invention.

15 is a longitudinal end view showing part of a coupling member of a motor according to an eighth modification of the second embodiment of the present invention.

16 is a plan view of a substrate of a motor according to a ninth modified example of the second embodiment of the present invention.

Detailed ways

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this specification, the direction along which the central axis of the motor extends is referred to as "axial" for short, and the direction centered on the central axis of the motor and perpendicular to the central axis is referred to as "radial" for short. The direction of the arc with the axis as the center is referred to as "circumferential direction" for short. In addition, in this specification, for convenience of explanation, the shape and positional relationship of each part will be described with the axial direction as the up-down direction and the up-down direction in FIG. 1 as the up-down direction of the motor. In addition, the definition of the vertical direction does not limit the orientation and positional relationship when the motor is used. In addition, in this specification, the end surface of the cutting part parallel to an axial direction is called a "longitudinal end surface." In addition, "parallel" and "perpendicular" used in this specification not only mean parallel and perpendicular in a strict sense, but also include substantially parallel and substantially perpendicular.

＜1-1. The overall structure of the motor＞

FIG. 1 is a side view of a motor 1 according to a first embodiment of the present invention. Fig. 2 is a plan view of the motor 1 according to the first embodiment of the present invention. FIG. 3 is a longitudinal end view showing part of the coupling member 9 of the motor 1 according to the first embodiment of the present invention. In addition, in FIG. 1, the main part including the stator 5, the rotor 6, etc. of the motor 1 is drawn as a vertical end surface.

The motor 1 has a bearing housing 2 , a bearing 3 , a shaft 4 , a stator 5 , a rotor 6 , a base plate 7 , lead wires 8 , and a coupling member 9 .

The bearing housing 2 is disposed radially inside the stator 5 . The bearing housing 2 has a cylindrical shape extending up and down in the axial direction. The bearing housing 2 has a bearing holding portion 21 and a stator holding portion 22 .

The bearing holding portion 21 is arranged at the lower portion of the bearing housing 2 . The bearing holding portion 21 has a cup shape, and is recessed in a concave shape from the axially lower end of the bearing housing 2 toward the axially upper side. One bearing 3 is held on the inner peripheral portion of the bearing holding portion 21 .

The stator holding portion 22 is disposed on the upper portion of the bearing housing 2 . The stator 5 is held on the outer peripheral portion of the stator holding portion 22 .

A pair of bearings 3 are arranged up and down in the axial direction. The lower bearing 3 is held by the bearing holding portion 21 of the bearing housing 2 . The upper bearing 3 is held by the bearing holding portion 53 of the stator 5 . The bearing 3 is composed of, for example, a ball bearing, but may also be composed of a sleeve bearing or the like.

The shaft 4 is arranged along the central axis C1. The shaft 4 is a columnar member extending up and down. The shaft 4 is supported by a pair of upper and lower bearings 3 so as to be rotatable about the central axis C1 with respect to the bearing housing 2 and the stator 5 .

The stator 5 is fixed to the outer peripheral portion of the stator holding portion 22 of the bearing housing 2 . The stator 5 is disposed radially inside the rotor 6 . The stator 5 has a stator core 51 , a coil 52 and a bearing holding portion 53 .

The stator core 51 has an annular shape centered on the central axis C1. The stator core 51 is formed by, for example, laminating electromagnetic steel sheets such as silicon steel sheets up and down in the axial direction. The coil 52 is formed of a conductive wire wound around the stator core 51 via an insulating material (not shown).

The bearing holding portion 53 is disposed on the upper portion of the stator 5 . The bearing holding portion 53 has a cup shape, and is recessed in a concave shape from the axially upper end of the stator core 51 toward the axially lower side. One bearing 3 is held on the inner peripheral portion of the bearing holding portion 53 .

The rotor 6 is arranged on the radially outer side of the stator 5 . The rotor 6 rotates around a central axis C1 extending up and down. The rotor 6 rotates around the central axis C1 relative to the stator 5 . The rotor 6 has a rotor hub 61 and magnets 62 .

The rotor hub 61 has a cup shape, has an open axial lower end, and is recessed axially upward. The rotor hub 61 is fixed to the axial upper end of the shaft 4 . The magnet 62 is composed of a plurality of plate-shaped magnet pieces. Each magnet piece is fixed on the inner peripheral surface of the rotor hub 61 . The magnet 62 is arranged on the radially outer side of the stator 5 and faces the stator core 51 in the radial direction.

The base plate 7 is disposed on the axially lower side of the stator 5 . Lead wires (not shown) of the coil 52 are electrically connected to the substrate 7 . A circuit (not shown) for supplying a drive current to the coil 52 is mounted on the substrate 7 .

Leads 8 are electrically connected to substrate 7 . At least one lead wire 8 is provided. In this embodiment, for example, three lead wires 8 are provided. The leads 8 supply electric power to the substrate 7 from the outside.

The coupling member 9 is a tube 91 . The tube 91 bundles a part of the lead wire 8 and a part of the substrate 7 together. The detailed structure of the substrate 7, the lead wire 8, and the tube 91 will be described later.

In the motor 1 configured as described above, when a drive current is supplied to the coil 52 via the lead wire 8 and the substrate 7 , radial magnetic flux is generated in the stator core 51 . The magnetic field generated by this magnetic flux of the stator 5 acts on the magnetic field generated by the magnet 62 to generate torque in the circumferential direction of the rotor 6 . This torque causes the rotor 6 to rotate about the central axis C1.

＜1-2. Detailed structure of the motor＞

FIG. 4 is a plan view of the substrate 7 of the motor 1 according to the first embodiment of the present invention.

The substrate 7 has a main body portion 71 , a protruding portion 72 , a circuit pattern 73 , a land portion 74 , a connection portion 75 , and an adhesive 76 .

The main body portion 71 is opposed to the stator 5 in the axial direction. The main body portion 71 is located on the axially lower side of the stator 5 . The main body portion 71 has a disc shape expanding radially around the central axis C1. A hole portion 711 into which the bearing housing 2 is inserted is arranged at a radial center portion of the main body portion 71 . The hole portion 711 penetrates the main body portion 71 up and down in the axial direction.

The protruding portion 72 extends radially outward from the outer peripheral portion of the main body portion 71 . The protruding portion 72 extends from a portion of the outer peripheral portion of the main body portion 71 in the circumferential direction. The protruding portion 72 has a rectangular shape when viewed from the axial direction. The main body portion 71 and the protruding portion 72 have the same thickness.

The circuit pattern 73 extends from the main body portion 71 to the protruding portion 72 . The pad portion 74 is arranged at an end portion of the circuit pattern 73 on the protruding portion 72 side. The number of circuit patterns 73 and land portions 74 is the same as that of leads 8 , and three are provided each. In the protruding portion 72 , three circuit patterns 73 are arranged side by side at predetermined intervals in a direction perpendicular to the direction in which the protruding portion 72 extends.

The lead wire 8 is arranged on the protruding portion 72 . The three lead wires 8 are individually and electrically connected to the three pad portions 74 . The lead wire 8 is connected to the pad portion 74 by soldering. The three leads 8 respectively extend radially outward from the pad portion 74 along the protruding portion 72 .

As shown in FIGS. 1 , 2 and 3 , the tube 91 accommodates the lead wire 8 and the protrusion 72 . Specifically, at least a part of the periphery of the protruding portion 72 side end portion of the lead wire 8 and the radially outer end portion periphery of the protruding portion 72 are housed in the tube 91 . The three lead wires 8 are arranged in a row on the axially upper side of the protruding portion 72 in a direction perpendicular to the direction in which the protruding portion 72 extends. The bonding member 9 binds the lead wire 8 and the protruding portion 72 together. In this way, at least a part of one end side of the lead wire 8 and at least a part of the protruding portion 72 are fixed together by the joining member 9 as the tube 91 .

According to the structure of the above-mentioned embodiment, the holding force of the lead wire 8 with respect to the board|substrate 7 can be improved. Thereby, stress concentration at the welded portion can be suppressed. That is, the land portion 74 can be brought closer to the radially outer side of the protruding portion 72 . Therefore, the welded portion can be kept away from the rotor 6 , so that the welded portion can be prevented from coming into contact with the rotor 6 .

By accommodating the lead wire 8 and the protruding portion 72 in the tube 91, the lead wire 8 and the protruding portion 72 can be easily bundled together.

One lead 8 among the three leads 8 is called a first lead 81 . The first lead 81 is electrically connected to the first pad portion 741 among the three pad portions 74 . The first pad portion 741 is arranged at the exact center of the three pad portions 74 in the direction perpendicular to the direction in which the protruding portion 72 extends. The first land portion 741 is disposed radially outward of the other two land portions 74 . According to this structure, it is possible to maintain the distance between the lead wire 8 and the rotor 6 and to prevent a short circuit between the three land portions 74 at the time of welding.

The connection portion 75 is arranged on the axially upper surface of the land portion 74 . The connection portion 75 includes the end portion of the soldered lead 8 and the land portion 74 . At the connection portion 75 , the land portion 74 is connected to the lead 8 . The connecting portion 75 is covered with an adhesive 76 . According to this configuration, the connection strength between the pad portion 74 and the lead wire 8 at the soldered portion can be improved.

＜1-3.Modification of motor＞

5 is a longitudinal end view showing part of the coupling member 9 of the motor 1 according to the first modified example of the first embodiment of the present invention. 6 is a longitudinal end view showing part of the coupling member 9 of the motor 1 according to the second modified example of the first embodiment of the present invention. 7 is a longitudinal end view showing part of the coupling member 9 of the motor 1 according to the third modified example of the first embodiment of the present invention. 8 is a longitudinal end view showing part of the coupling member 9 of the motor 1 according to the fourth modified example of the first embodiment of the present invention. 9 is a longitudinal end view showing part of the coupling member 9 of the motor 1 according to the fifth modified example of the first embodiment of the present invention. FIG. 10 is a plan view of a substrate 7 of a motor 1 according to a sixth modified example of the first embodiment of the present invention.

In the first modified example shown in FIG. 5 , the coupling member 9 is molded resin 92 . The molded resin 92 accommodates the lead wire 8 and the protruding portion 72 . In this way, the lead wire 8 and the protruding portion 72 are fixed together by the bonding member 9 as the molding resin 92 . In addition, other members may be used instead of the tube 91 and the molding resin 92 for the coupling member 9 .

In the second modified example shown in FIG. 6 and the third modified example shown in FIG. 7 , three lead wires 8 are arranged in two layers up and down in the axial direction. In the second modified example, the first lead wire 81 is arranged axially above the other two lead wires 8 . In the third modified example, the first lead wire 81 is arranged axially lower than the other two lead wires 8 .

In the fourth modified example shown in FIG. 8 , three lead wires 8 are arranged in two layers vertically in the axial direction with protrusions 72 interposed therebetween. The first lead wire 81 is arranged on the axial upper side of the protruding portion 72 , and the other two lead wires 8 are arranged on the axial lower side of the protruding portion 72 . In addition, the first lead wire 81 may be arranged on the axially lower side of the protruding portion 72 , and the other two lead wires 8 may be arranged on the axially upper side of the protruding portion 72 .

Like the fifth modified example shown in FIG. 9 , there may be one lead wire 8 . The lead wire 8 is arranged on the upper side in the axial direction of the protruding portion 72 . In addition, the lead wire 8 may be arranged on the axially lower side of the protruding portion 72 . In addition, the number of lead wires 8 may be two or more than four.

In the sixth modified example shown in FIG. 10 , the positions of the three land portions 74 in the extending direction of the protruding portion 72 are the same. In detail, for example, the positions of the three land portions 74 of the sixth modification in the extending direction of the protruding portion 72 correspond to the other two land portions 74 except the first land portion 741 in FIG. 4 . same.

In these modified examples of the motor 1 as well, it is possible to improve the holding force of the lead wire 8 with respect to the substrate 7 . Thereby, stress concentration at the welded portion can be suppressed.

<2-1. Detailed structure of the motor>

Fig. 11 is a plan view of a motor 1 according to a second embodiment of the present invention. FIG. 12 is a longitudinal end view showing part of the coupling member 9 of the motor 1 according to the second embodiment of the present invention. FIG. 13 is a plan view of the substrate 7 of the motor 1 according to the second embodiment of the present invention. In addition, since the basic structure of this embodiment is the same as that of the first embodiment described above, the same reference numerals or the same names as those of the first embodiment may be attached to components common to the first embodiment, and description thereof will be omitted.

The protruding portion 72 of the substrate 7 has a first protruding portion 721 and a second protruding portion 722 .

The first protruding portion 721 extends radially outward from the outer peripheral portion of the main body portion 71 . The first protruding portion 721 extends from a portion of the outer peripheral portion of the main body portion 71 in the circumferential direction. When viewed from the axial direction, the first protruding portion 721 has a rectangular shape.

The second protruding portion 722 extends radially outward from the outer peripheral portion of the first protruding portion 721 . The second protruding portion 722 extends from the radially outer end portion of the outer peripheral portion of the first protruding portion 721 . When viewed from the axial direction, the second protruding portion 722 has a rectangular shape. The width of the second protrusion 722 in the direction perpendicular to the extending direction is smaller than the width of the first protrusion 721 in the direction perpendicular to the extending direction. The second protruding portion 722 is disposed at the center of the first protruding portion 721 in a direction perpendicular to the extending direction.

The first pad portion 741 is disposed on the first protruding portion 721 . The first pad portion 741 is disposed at the root of the second protruding portion 722 relative to the first protruding portion 721 . In other words, the first pad part 741 is disposed at the end of the first protrusion part 721 on the side where the second protrusion part 722 extends. The first lead 81 is electrically connected to the first pad portion 741 . The first lead 81 extends radially outward from the first pad portion 741 along the second protruding portion 722 . Thus, the first lead 81 is arranged on the second protruding portion 722 .

As shown in FIG. 11 , the tube 91 accommodates the second protrusion 722 and the three lead wires 8 . Specifically, a part of the periphery of the protruding portion 72 side end portions of the three lead wires 8 and the entire second protruding portion 722 are accommodated in the tube 91 . In this way, the first lead wire 81 and the second protruding portion 722 are fixed together by the coupling member 9 serving as the tube 91 .

According to the structure of the above-mentioned embodiment, by dividing the connection destinations of the plurality of leads 8 into the first protrusion 721 and the second protrusion 722, it is possible to suppress the enlargement of the width of the protrusion 72 and increase the distance between adjacent leads 8 . distance. Thereby, it is possible to prevent short-circuiting of the welded portion. In addition, it is possible to suppress the arrangement of the leads 8 on the outer peripheral edge of the substrate 7 .

The radially outer end of the first pad portion 741 is at the same radial position as the radially outer end of the first protruding portion 721 . According to this configuration, the first land portion 741 can be moved to the outer peripheral side. Therefore, it is possible to prevent the first pad portion 741 from being short-circuited during soldering.

The motor 1 has a second lead wire 82 and a third lead wire 83 as three lead wires 8 in addition to the first lead wire 81 . The first protruding portion 721 has a second pad portion 742 and a third pad portion 743 . The second lead 82 is electrically connected to the second pad portion 742 . The third lead 83 is electrically connected to the third pad portion 743 . The second lead 82 and the third lead 83 are disposed on the first protrusion 721 . The first pad portion 741 is arranged at the exact center of the second pad portion 742 and the third pad portion 743 in a direction perpendicular to the extending direction of the first protruding portion 721 . The first lead 81 is arranged between the second lead 82 and the third lead 83 in the width direction perpendicular to the direction in which the protruding portion 72 extends.

According to this configuration, as shown in FIG. 12 , when housed in the tube 91 , the first lead wire 81 , the second lead wire 82 , and the third lead wire 83 are arranged side by side in the width direction. The first lead 81 disposed on the second protrusion 722 is disposed between the second lead 82 and the third lead 83 . Therefore, the distance between the second lead 82 and the third lead 83 and the second protrusion 722 is shortened, and stress does not concentrate on any of the second lead 82 and the third lead 83 . Therefore, the strength of the lead wire 8 is improved.

The width of the second protrusion 722 in the direction perpendicular to the extending direction is less than three times the diameter of the lead wire 8 . According to this configuration, the width of the second protrusion 722 and the three lead wires 8 bundled by the tube 91 in the direction perpendicular to the extending direction can be shortened. Accordingly, the lead wire 8 does not become an obstacle when assembling the motor 1 . In addition, for example, when the motor 1 is used in an air blower or the like, the influence of the lead wire 8 on the air blowing performance can be suppressed.

＜2-2.Modification of motor＞

14 is a longitudinal end view showing part of the coupling member 9 of the motor 1 according to the seventh modified example of the second embodiment of the present invention. 15 is a longitudinal end view showing part of the coupling member 9 of the motor 1 according to the eighth modified example of the second embodiment of the present invention. FIG. 16 is a plan view of a substrate 7 of a motor 1 according to a ninth modified example of the second embodiment of the present invention.

In the seventh modified example shown in FIG. 14 and the eighth modified example shown in FIG. 15 , the first lead 81 , the second lead 82 , and the third lead 83 are arranged in two layers up and down in the axial direction. In the seventh modified example, the first lead wire 81 is arranged axially lower than the second lead wire 82 and the third lead wire 83 . In the eighth modification, the first lead wire 81 is arranged axially above the second lead wire 82 and the third lead wire 83 .

According to this structure, the shape of the three lead wires 8 bundled by the tube 91 and the second protruding part 722 is stable, and it is easy to bundle. Furthermore, the width of the three lead wires 8 bundled by the tube 91 in the direction perpendicular to the extending direction can be shortened. Therefore, the lead wire 8 does not become an obstacle when assembling the motor 1 . In addition, for example, when the motor 1 is used in an air blower or the like, the influence of the lead wire 8 on the air blowing performance can be suppressed.

In the ninth modified example shown in FIG. 16 , the radially outer end of the first land portion 741 is positioned radially outward from the radially outer end of the first protruding portion 721 . According to this configuration, the first land portion 741 can be moved to the outer peripheral side. Therefore, it is possible to prevent the first pad portion 741 from being short-circuited during soldering.

＜3. Others＞

As mentioned above, although embodiment of this invention was described, the scope of this invention is not limited to this, Various changes can be added and implemented in the range which does not deviate from the summary of the invention. In addition, the above-described embodiments and modifications thereof can be combined arbitrarily.

The present invention can be applied to motors, for example.

Claims (9)

1. a kind of motor, includes

Rotor is rotated around the central axis extended up and down；

Stator is configured at the radially inner side of the rotor；

Substrate is configured at the axial downside of the stator；And

At least one lead, is electrically connected with the substrate,

The motor is characterized in that,

The substrate includes

Main part, it is opposed in the axial direction with the stator；And

Protruding portion extends from the peripheral part of the main part to radial outside,

One end of the lead is configured at the protruding portion,

At least part of the one end of the lead and at least part of the protruding portion are combined component and are fixed on Together.

2. motor according to claim 1, which is characterized in that

The bonded block is pipe,

The lead and the protruding portion are accommodated in the pipe.

3. motor according to claim 1 or 2, which is characterized in that

The motor has a plurality of lead,

The substrate has the multiple welding disks being electrically connected with a plurality of lead,

The the first welding disk configuration being electrically connected with a first lead in a plurality of lead is than other welding disks By the position of radial outside.

4. motor according to claim 3, which is characterized in that

The substrate has the interconnecting piece being formed by connecting by the welding disk and the lead,

Glued dose of interconnecting piece covering.

5. motor according to claim 3, which is characterized in that

The protruding portion includes

First protruding portion extends from the peripheral part of the main part to radial outside；And

Second protruding portion extends from the peripheral part of first protruding portion to radial outside,

Width on the direction vertical with extending direction of second protruding portion be less than first protruding portion with extension side Width on vertical direction,

The first lead is configured at second protruding portion,

The first lead is fixed together with second protruding portion by the bonded block.

6. motor according to claim 5, which is characterized in that

The radial outer end of first welding disk and the radial position of radial outer end of first protruding portion are identical or described The radial outer end of first welding disk is located at the position that radial outside is leaned on than the radial outer end of first protruding portion.

7. motor according to claim 5 or 6, which is characterized in that

The motor has the second lead and third lead for being configured at first protruding portion,

In the width direction vertical with the extending direction of the protruding portion, the first lead be configured at second lead with Between the third lead.

8. motor according to claim 7, which is characterized in that

The first lead and second lead and the third lead are configured to down two layers vertically.

9. motor according to claim 5 or 6, which is characterized in that

Width on the direction vertical with extending direction of second protruding portion is less than three times of the diameter of the lead.