CN210225140U - Electric motor - Google Patents

Abstract

A motor can prevent damage of a bonding portion of a wire caused by wire pulling. The motor (1) comprises a stator (20), a rotor (30) disposed inside the stator (20), a housing (10) for housing the stator, a terminal pin (70) for binding the end of a coil wire, a lead (90) electrically connected to the terminal pin (70) and led out of the housing (10), and a clip member (60) for bending and holding the lead (90) along the outer surface of the housing (10).

Description

Electric motor

Technical Field

The utility model relates to a motor technology especially relates to the structure of laying of lead wire.

Background

Patent document 1 listed below discloses a motor 1 in which a lead wire 19 is directly soldered to a substrate 18 disposed inside a case 4.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-132090

SUMMERY OF THE UTILITY MODEL

In a motor in which a lead is soldered to a substrate or the like in a case, when the lead is pulled, a load is applied to a bonding portion of the lead, which may cause a contact failure. On the other hand, in the case where a structure for preventing the force of pulling the lead from reaching the bonding portion of the lead is provided in the case, it is difficult to miniaturize the motor, and the soldering work of the lead becomes complicated.

In view of the above-described problems, an object of the present invention is to provide a motor capable of preventing damage to a bonding portion of a lead due to lead pulling.

Technical scheme for solving technical problem

In order to solve the above-described problems, an object of the present invention is to provide a motor including: a stator; a rotor disposed inside the stator; a housing that houses the stator and the rotor; a terminal pin for binding the end of the coil wire; a lead wire electrically connected to the terminal pin and led out to the outside of the case; and a clip member that bends and holds the lead wire along an outer surface of the case.

By bending and holding the lead drawn out from the case so as to follow the outer surface of the case, the force when the lead is pulled is dispersed to the bent portion of the lead, and the force reaching the bonding portion of the lead can be reduced.

The utility model discloses a motor also can constitute for: when a direction along an axial direction of the motor is a longitudinal direction and a direction along a radial direction of the motor is a lateral direction, the lead wire is drawn out from the housing in the lateral direction, and the clip member bends and holds the lead wire in the longitudinal direction.

Preferably, the clip member is a frame-like body, and a part of a range of the lead wire held by the clip member is projected to the outside of the clip member.

By forming the clip member into a frame-like body and removing the bending of the lead wire to hold the unnecessary portion, the increase in the size of the motor accompanying the attachment of the clip member can be suppressed.

In addition, the lead may be directly soldered to the terminal pin.

In the motor of the present invention, since the force generated when the lead is pulled is not easily transmitted to the bonding portion of the lead, even when the lead is directly soldered to the terminal pin, the bonding portion can be prevented from being damaged.

In addition, the motor of the present invention may be configured such that: the housing has a cover member constituting a part of an outer peripheral surface thereof, and the lead is led out from an opening of the cover member to the outside of the housing. In this case, it is preferable that the cover member has a protruding portion protruding outward from a part of an outer surface thereof, and the lead is bent along the protruding portion.

By providing the housing with a separate cover member, the degree of freedom of how the lead wires are drawn out and laid can be improved. Further, the lead is bent along the protruding portion of the cover member, whereby the degree of freedom of how the lead is bent, for example, by forming the protruding portion in a shape suitable for the bending of the lead, can be improved.

Preferably, the motor of the present invention further includes a plurality of the leads, wherein the extension portion includes a partition plate that is a plate-shaped body that partitions a wiring path of each of the leads, and a groove portion that is formed along the wiring path of each of the leads.

The protruding portion has a partition plate and a groove portion for guiding the lead wiring, so that the lead on the protruding portion can be regularly wired along a predetermined path.

In the motor according to the present invention, it is preferable that the protruding portion has a support surface that supports a root portion of the lead wire drawn out from the cover member so as not to be bent, and when the support surface is an upper surface of the protruding portion and a surface on an opposite side thereof is a lower surface of the protruding portion, the clip member sequentially clips the lead wire from the root portion thereof toward the tip side between the lead wire and the support surface in the longitudinal direction, between the lead wire and the lower surface of the protruding portion in the longitudinal direction, and between the lead wire and the outer surface of the case in the lateral direction. In this case, the following configuration may be adopted: the lead is bent three times by the cover member and the clip member and held.

By pressing a plurality of portions of the bent lead with the clip member, the force when the lead is pulled can be dispersed more effectively. Further, by bending the lead so that the lead is arranged in two directions orthogonal to the direction in which the lead is pulled and opposite to each other, it is possible to more reliably prevent the force when the lead is pulled from being transmitted to the bonding portion of the lead.

In the motor according to the present invention, it is preferable that the extension has a support surface that supports a root portion of the lead drawn from the cover member so as not to be bent, the root portion of the lead is sandwiched between the support surface and the clip member in the longitudinal direction, the lead is soldered directly to the terminal pin or soldered to another member electrically connected to the terminal pin, and the root portion of the lead is a portion near a portion to which the lead is soldered.

The root portion of the lead near the bonding portion is sandwiched between the support surface and the clip member without being bent, whereby the load on the bonding portion caused by bending the lead itself can be reduced.

Preferably, the terminal pin has a V-shaped, U-shaped, or コ -shaped joint portion to which the core wire of the lead wire is placed and soldered.

The terminal pin has a V-shaped, U-shaped or コ -shaped joint portion on which the core wire of the lead can be placed, thereby improving the efficiency of soldering work of the lead.

(effects of utility model)

As described above, according to the motor of the present invention, damage to the bonding portion of the wire due to the wire being pulled can be prevented.

Drawings

Fig. 1 is a perspective view showing an external appearance of a motor according to an embodiment.

Fig. 2 is a side sectional view showing an internal structure of the motor.

Fig. 3 is a top perspective view showing a reduction gear mechanism of the motor.

Fig. 4 is a perspective view showing the structure of the terminal cover and the clip member.

Fig. 5 is a side sectional view showing a bent structure of a lead.

Fig. 6 is a diagram showing a positioning structure of the gear plate.

Fig. 7 is a diagram showing the shape of the joint portion of the terminal pin.

Description of the reference numerals

1: an electric motor; 10: a housing; 11: a body portion; 12: a cover body; 122: an abutting portion; 13: a gear plate; 13 a: a gear bearing surface; 13 b: a wall-shaped portion; 131: a convex portion; 21: a phase A coil former; 21 a: a terminal support portion; 30: a rotor; 41: a first gear; 42: a second gear; 43: a third gear; 44: an output shaft; 44 a: a gear portion; 50: a cover member; 51: a protruding portion; 51 a: a bearing surface; 51 b: a lower surface; 52: a partition plate; 53: a groove part; 56: an abutting portion; 60: a clip member; 60 a: putting the frame on; 60 b: a lower frame; 61: a through hole; 62: a pressing part; 70: a terminal pin; 71: a binding section; 72: a joint portion; 90: a lead wire; 91: core wire

Detailed Description

[ integral Structure ]

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The motor 1 of the present embodiment (hereinafter also referred to as "the present embodiment") is a geared motor that decelerates and outputs the rotation of the rotor. In the following description, "upper" and "lower" refer to directions parallel to the Z axis indicated by the coordinate axes depicted in fig. 1, and the Z1 side is "upper" and the Z2 side is "lower". "front" and "rear" refer to directions parallel to the X axis indicated by the same coordinate axes, and the X1 side is "front" and the X2 side is "rear". Similarly, "left and right" refers to a direction parallel to the Y axis displayed on the same coordinate axis. In addition, "horizontal" refers to the XY plane direction displayed on the same coordinate axis.

Fig. 1 is a perspective view showing an external appearance of the motor 1. The motor 1 of the present embodiment has a stator, which will be described later, a rotor disposed inside the stator, a case 10 housing a reduction gear train, an output shaft 44 extending upward from the case 10, 5 lead wires 90 led out forward from the case 10, and a clip member 60 fixing these lead wires 90.

The housing 10 includes a bottomed cylindrical main body 11, a lid 12 covering an opening at the upper end of the main body 11, and a terminal cover 50 as a cover member constituting a part of the outer peripheral surface of the main body 11. An opening portion, in which the surface of the main body 11 is cut from the upper end to the vicinity of the lower end, is formed in a portion corresponding to the front surface of the main body 11 on the outer peripheral surface thereof, and the terminal cover 50 is attached to the opening portion.

The cover 12 has a sleeve-shaped opening 12b through which the output shaft 44 is inserted. The output shaft 44 inserted into the opening 12b is supported by the opening 12b via a bearing 44 b. Further, the lid 12 is provided with a pair of attachment pieces 12a extending in a tongue shape to the left and right. The attachment piece 12a is a connection portion for assembling the motor 1 to its upper device or the like.

Fig. 2 is a side sectional view showing an internal structure of the motor 1 of fig. 1 when viewed in the direction of arrow S.

The drive source of the motor 1 of the present embodiment is a two-phase stepping motor including a stator 20 and a rotor 30. The stator 20 is composed of an a-phase stator and a B-phase stator. The a-phase stator includes an a-phase bobbin 21, an a-phase stator coil 22 wound around the a-phase bobbin 21, and an upper yoke 23a and a lower yoke 23b which are claw-pole salient poles. The B-phase stator similarly includes a B-phase bobbin 26, a B-phase stator coil 27 wound around the B-phase bobbin 26, an upper yoke 28a, and a lower yoke 28B. Further, a part of the bottom surface of the main body 11 is cut into the main body 11, thereby forming a lower yoke portion 28B of the B-phase stator coil 27.

A terminal support portion 21a for holding the terminal pin 70 is provided at the front edge of the a-phase bobbin 21. The terminal pin 70 is a pin terminal in which both ends in the longitudinal direction thereof are bent up and down. The front side portions of the terminal pins 70 are bent downward to form binding portions 71 that bind the ends of the coil wires of the stator coils 22, 27. The rear portion of the terminal pin 70 is bent upward to form a joint portion 72 to which the core wire 91 of the lead 90 is soldered. The joint 72 is exposed to the outside of the case 10 through an opening provided in the terminal cover 50, and the lead wire 90 having the core wire 91 soldered to the joint 72 is drawn out from the terminal cover 50 to the outside of the case 10.

The rotor 30 is disposed within the ring of the stator coils 22 and 27 with a predetermined air gap therebetween. The rotor 30 is composed of a rotor magnet 32 as a permanent magnet and a rotor holder 31 as a resin shaft body insert-molded to the rotor magnet 32. A shaft hole penetrating vertically is formed at the radial center of the rotor holder 31, and a rotor support shaft 39 as a fixed shaft is inserted into the shaft hole. One end of the rotor support shaft 39 is fixed to a hole formed in the cover 12, and the other end is fixed to a hole formed in the housing 10. The lower surface of the rotor 30 is supported by a leaf spring 35, the leaf spring 35 is a leaf spring, and the rotor 30 is biased upward by the leaf spring 35.

The stator coils 22 and 27 (more precisely, the upper yoke 23a of the a-phase stator coil 22) are provided with a gear plate 13 as a plate for supporting a reduction gear train. The gear plate 13 has a gear support surface 13a as a horizontal surface and a wall-shaped portion 13b extending upward from the gear support surface 13 a. A pinion gear 31a as a gear portion is formed at an upper end of the rotor holder 31, and the pinion gear 31a protrudes upward from a through hole provided in the gear plate 13. A plurality of support shafts 49 are disposed between the gear support surface 13a and the lower surface of the cover 12, and a gear member such as the first gear 41 connected to the pinion 31a is rotatably supported on the support shafts 49. The lower end portion of the output shaft 44 is rotatably supported by a bearing 44c provided on the gear support surface 13 a. The wall-shaped portion 13b of the gear plate 13 separates a space in which the reduction gear train is arranged and a space in which the engaging portion 72 of the terminal pin 70 is arranged.

In the present embodiment, 5 terminal pins 70 are provided, and the end portions of the two coil leads of the a-phase stator coil 22, the end portions of the two coil leads of the B-phase stator coil 27, and the end portions of 1 common lead, which is a common coil lead for the a-phase and the B-phase, are bundled at the bundling portion 71 of these terminal pins 70. Further, detailed description of the arrangement of the coil lead ends bundled in each bundling section 71 is omitted, and these arrangements may be changed as appropriate.

Fig. 3 is a top perspective view showing the structure of the reduction gear train of the motor 1. The first gear 41, the second gear 42 (gear member), and the third gear 43 (gear member) constituting the reduction gear train of the motor 1 are each a compound gear formed by integrally forming spur gears having different pitch circle diameters in the axial direction. The rotation of the pinion 31a is decelerated by the first gear 41, the second gear 42, and the third gear 43 and transmitted to the output shaft 44. Specifically, the pinion 31a meshes with the large diameter gear portion 41a of the first gear 41, and the small diameter gear portion 41b of the first gear 41 meshes with the large diameter gear portion 42a of the second gear 42. Similarly, the small-diameter gear portion 42b of the second gear 42 meshes with the large-diameter gear portion 43a of the third gear 43. The small-diameter gear portion 43b of the third gear 43 meshes with the gear portion 44a, and the gear portion 44a is integrated with the output shaft 44.

[ fixing Structure of lead wire ]

Fig. 4 is a perspective view showing the structure of the terminal cover 50 and the clip member 60. The terminal cover 50 and the clip member 60 of the present embodiment bend and hold the lead wire 90 drawn out of the housing 10, and disperse and absorb the force when the lead wire 90 is pulled, thereby preventing damage to the joint portion (hereinafter, also simply referred to as "joint portion of the lead wire 90") where the core wire 91 of the lead wire 90 and the joint portion 72 of the terminal pin 70 are soldered.

(Structure of terminal cover)

As described above, the terminal cover 50 is attached to the opening formed in the portion corresponding to the front surface of the main body 11, and constitutes a part of the outer peripheral surface of the housing 10. The terminal cover 50 includes inner fitting portions 581 and 582 which contact the inner surface of the main body 11 from the inside of the main body 11, and an outer fitting portion 59 which contacts the outer surface of the main body 11 from the outside of the main body 11. The terminal cover 50 is attached so that the opening edge of the main body 11 is sandwiched between the inner fitting portions 581 and 582 and the outer fitting portion 59 in the thickness direction thereof.

As shown in fig. 3, the inner fitting portion 581 has a hook portion that engages with the terminal support portion 21a of the phase a bobbin 21, and thereby the relative positional relationship between the terminal cover 50 and the phase a bobbin 21 is fixed. A boss 57, which is a rectangular projection in a plan view projecting upward, is formed on the upper surface of the terminal cover 50, and the boss 57 is fitted into a boss hole 121 formed at a corresponding position of the lid body 12. Thereby, the relative positional relationship between the terminal cover 50 and the lid 12 is fixed.

The terminal cover 50 of the present embodiment has a protruding portion 51, a part of the outer surface of which protrudes forward, and the lead 90 is curved along the protruding portion 51. Thus, the lead 90 itself can be bent while reducing the burden associated with the bending, as compared with the case where the lead 90 is bent by bending it linearly.

The terminal cover 50 has 6 spacers 52 formed on a support surface 51a as an upper surface thereof, and the spacers 52 are plate-like bodies that separate wiring paths of the leads 90. These partition plates 52 are arranged in a row in the left-right direction with the plate surfaces facing the left and right. Further, 5 grooves 53 serving as wiring paths for the leads 90 are formed in the lower surface 51b opposite to the support surface 51a of the extension 51. As described above, in the motor 1 of the present embodiment, the partition plate 52 and the groove 53 for guiding the wiring of the lead 90 are provided in the extension portion 51, and thus the lead 90 on the extension portion 51 can be neatly wired along a predetermined path.

As shown in fig. 2, the terminal support portion 21a of the a-phase bobbin 21 and the bundling portion 71 of the terminal pin 70 are housed in the inside of the extension portion 51. In this way, the internal space of the extension portion 51 is also used for the arrangement of the components housed in the case 10, thereby realizing the downsizing of the motor 1.

(Structure of clip Member)

The clip member 60 is a frame-like body that presses the lead wire 90 drawn out from the terminal cover 50 to bend along the outer surface of the terminal cover 50.

On the surface of the clip member 60 on the terminal cover 50 side, a pair of hook-shaped and upwardly projecting claw portions 64 are provided at both left and right ends of the vicinity portion of the upper end thereof, and a pair of hook-shaped and upwardly projecting claw portions 65 are also provided at both left and right ends of the lower end portion of the same surface. On the other hand, on the surface of the terminal cover 50 on the side of the clip member 60, a pair of hook-shaped claw portions 54 projecting downward are provided at positions corresponding to the upper claw portions 64 of the clip member 60, and a pair of hook-shaped claw portions 55 projecting downward are also provided at positions corresponding to the lower claw portions 65 of the clip member 60. When the clip member 60 is attached to the terminal cover 50, first, the upper claw portion 64 of the clip member 60 is engaged with the upper claw portion 54 of the terminal cover 50, and then, the lower claw portion 65 of the clip member 60 is elastically deformed to be fitted into the rear side of the lower claw portion 55 of the terminal cover 50.

The clip member 60 of the present embodiment is a frame-shaped body having a through hole 61 formed at the center thereof. Therefore, a part of the range of the lead 90 bent by the clip member 60 to be held extends from the through hole 61 to the outside of the clip member 60 (see fig. 1). More specifically, a portion wired along the front surface of the protruding portion 51 of the terminal cover 50 protrudes from the through hole 61 to the outside of the clip member 60. By designing the clip member 60 to be a frame-like body and removing the bending of the lead 90 and the unnecessary portion for holding, the outer dimension of the motor 1 can be suppressed from increasing with the attachment of the clip member 60.

Further, 5 pressing portions 62 in the shape of a block extending downward are formed on the lower surface of the upper frame 60a of the clip member 60. As will be described later in detail, the pressing portion 62 is configured to press the lead wires 90 from above, and the lead wires 90 are arranged on 5 wiring paths defined by the partition plates 52 provided on the support surface 50a of the terminal cover 50.

(bending structure of lead wire)

Fig. 5 is a side cross-sectional view showing a bent structure of the terminal cover 50 and the lead wire 90 of the clip member 60. Fig. 5 (a) is a diagram showing a state of the lead 90 before the clip member 60 is attached. Fig. 5 (b) is a diagram showing a state of the lead 90 after the clip member 60 is attached. Fig. 5 is a view of the motor 1 of fig. 1 as viewed in the direction of arrow S, as in fig. 2. In the following description, the vertical direction is also referred to as "vertical direction", and the horizontal direction (radial direction of the motor 1) is also referred to as "horizontal direction".

As shown in fig. 5, the lead wire 90 of the present embodiment is drawn out in the lateral direction from the opening of the terminal cover 50 ((a) of fig. 5), and is bent in the longitudinal direction and pressed against the terminal cover 50 by the clip member 60 ((b) of fig. 5).

More specifically, as shown in fig. 5 (a), the root portion of the lead 90 drawn out in the lateral direction is supported on the support surface 51a of the extension 51 without being bent. As shown in fig. 5 (b), the clamping member 60 clamps the root portion of the lead wire 90 between the pressing portion 62 and the support surface 51a in the longitudinal direction. Thereafter, the clip member 60 clips the lead wire 90 longitudinally between it and the lower surface 51b of the projecting portion 51 via the lower frame 60b, and then laterally between it and the outer surface of the terminal cover 50 via the lower frame 60 b. Thus, the lead 90 of the present embodiment is bent three times by the terminal cover 50 and the clip member 60 and held.

In the motor 1 of the present embodiment, a plurality of portions of the bent lead wire 90 are pressed by the clip member 60, and thus the portion of the lead wire 90 that overcomes the pulling force thereof when pulled is doubled. The lead 90 bent and held by the clip member 60 is arranged to extend in two directions (front-rear direction as viewed in fig. 5) orthogonal to the direction in which the lead 90 is pulled (downward as viewed in fig. 5) and in opposite directions. Thus, when the lead 90 is pulled, the lead 90 can be more reliably engaged with the clip member 60 and the extension portion 51.

Further, the lead 90 of the present embodiment is directly soldered to the terminal pin 70. In the motor 1 of the present embodiment, the force when the lead 90 is pulled is not easily transmitted to the bonding portion of the lead 90, so that even in the case where the lead 90 is directly soldered to the terminal pin 70, the bonding portion of the lead 90 can be prevented from being damaged.

As described above, the support surface 51a of the protruding portion 51 supports the root portion of the lead wire 90 without bending, and the lead wire 90 disposed on the support surface 51a is pressed in the longitudinal direction by the pressing portion 62 of the clip member 60. The root portion of the lead 90 disposed on the support surface 51a is a portion adjacent to the bonding portion of the lead 90. As described above, in the motor 1 of the present embodiment, the root portion near the bonding portion of the lead wire 90 is fixed by the support surface 51a and the clip member 60 without being bent, and therefore, the load on the bonding portion caused by bending the lead wire 90 itself can be reduced.

Further, although the clip member 60 of the present embodiment is designed as a frame-like body, the same effect of protecting the bonding portion of the lead 90 is obtained when it is designed as a cover body covering the entire holding range of the lead 90. The lead 90 does not always need to be soldered directly to the terminal pin 70, and may be soldered to a substrate electrically connected to the terminal pin 70. In the motor 1 of the present embodiment, the lead wire 90 is drawn out from the terminal cover 50 in the lateral direction and is bent and held in the longitudinal direction by the clip member 60, but the lead wire drawn out from the housing in the longitudinal direction may be bent and held in the lateral direction. In addition, the lead wire 90 may be drawn out to the outside of the case 10 from a portion other than the terminal cover 50.

[ positioning structure of gear plate ]

Fig. 6 is a diagram showing a positioning structure of the gear plate 13. Fig. 6 (a) is a perspective view of the gear plate 13. Fig. 6 (b) is a plan view of the motor 1.

As described above, the gear plate 13 has the gear support surface 13a as a horizontal surface and the wall-shaped portion 13b extending upward from the gear support surface 13 a. The gear support surface 13a supports a first gear 41, a second gear 42, a third gear 43, and an output shaft 44 (gear portion 44a) that constitute a reduction gear train. Therefore, the positional accuracy of the gear plate 13 inside the housing 10 also affects the operation accuracy of the motor 1.

In addition to the wall-shaped portion 13b, the gear support surface 13a of the present embodiment is provided with a pair of pillar portions 13c, and the pillar portions 13c extend upward from the left and right end portions of the gear support surface 13a and are in contact with the inner surface of the main body 11 and the lower surface of the lid 12. Bosses 132, which are protrusions protruding upward, are formed on the upper surface of the column portion 13c, and the bosses 132 are fitted into boss holes 123 formed at corresponding positions of the lid body 12.

On both ends of the wall-shaped portion 13b of the gear plate 13 in the longitudinal direction (the left-right direction in this embodiment) of the upper surface thereof, there are formed positioning portions, i.e., convex portions 131, which protrude upward. As shown in fig. 6 (b), the convex portion 131 is horizontally sandwiched between the terminal cover 50 and the lid body 12. The upper surface of the wall-shaped portion 13b is in contact with the lower surface of the lid 12 except for the projection 131.

As described above, in the motor 1 of the present embodiment, the wall-shaped portion 13b of the gear plate 13 has the convex portion 131, the convex portion 131 is sandwiched between the terminal cover 50 and the lid 12 in the horizontal direction, and the upper surface of the wall-shaped portion 13b other than the convex portion 131 comes into contact with the lower surface of the lid 12, thereby preventing the wall-shaped portion 13b from being tilted and displaced in the horizontal direction and upward. In addition, the convex portion 131 of the present embodiment is provided at both ends in the longitudinal direction of the upper surface of the wall-shaped portion 13 b. The portion of the wall-like portion 13b that is displaced maximally when the positional deviation occurs is fixed so as not to move, whereby the inclination, the positional deviation of the wall-like portion 13b is effectively prevented. In addition, the gear plate 13 of the present embodiment includes the column portion 13c, and the position accuracy of the gear plate 13 is further improved by the positioning function of the gear plate 13 by the column portion 13c and the boss 132 thereof.

The convex portion 131 of the present embodiment is formed in a right triangle shape in plan view. The surface corresponding to the oblique side thereof is in contact with the contact portion 122 of the lid body 12 having a shape complementary to the same surface, and the surfaces corresponding to the other two sides intersecting at right angles are in contact with the contact surface 56 of the terminal cover 50 having a shape complementary to the same surface. By forming the convex portion 131 to be a right triangle in plan view, and making the surface corresponding to the hypotenuse thereof contact the abutting portion 122 of the cover 12, and cutting the abutting portion 122 at the same angle as the same surface, even if the position of the gear plate 13 is slightly shifted when the cover 12 is attached, the gear plate 13 can be effectively corrected to the normal position by attaching the cover 12. This can simplify the assembly of the motor 1.

In the motor 1 of the present embodiment, as shown in fig. 2 and 3, the joint portion 72 of the terminal pin 70 and the space for housing the reduction gear train are separated by the wall portion 13b of the gear plate 13. The joint portion 72 of the terminal pin 70 is exposed to the outside from the opening of the terminal cover 50, and the core wire 91 of the lead wire 90 is directly soldered to the joint portion 72.

In the assembly process of the motor 1, after all the components except the clip member 60 and the lead wire 90 are assembled to the main body 11, the lead wire 90 is soldered to the bonding portion 72 of the terminal pin 70 from the opening portion of the terminal cover 50. Also, the clip member 60 is installed after that.

When the lead 90 is soldered from the opening of the terminal cover 50, even if a finger or a tool of an operator or the lead 90 comes into contact with the wall-shaped portion 13b, the position of the wall-shaped portion 13b is fixed by the convex portion 131, and therefore, the inclination and positional displacement of the gear plate 13 can be prevented.

In the gear plate 13 of the present embodiment, the wall-shaped portion 13b stands vertically to the gear support surface 13a, but the wall-shaped portion 13b does not always need to be perpendicular to the gear support surface 13a, and may extend obliquely upward. The column portion 13c of the gear plate 13 is not necessarily required, and may be omitted when sufficient positioning effect can be obtained only by using the wall-shaped portion 13 b. Moreover, even if the planar shape of the convex portion 131 of the wall-shaped portion 13b is designed to be, for example, circular, rectangular, instead of right-angled triangle, the positioning effect equivalent to that of the convex portion 131 of the present embodiment can be obtained. The position and number of the convex portions 131 on the upper surface of the wall-shaped portion 13b are not limited to those in the present embodiment, and may be arbitrarily changed. The form of the positioning portion of the wall-shaped portion 13b is not limited to the convex portion 131 of the present embodiment, and the entire upper end of the wall-shaped portion 13b in the longitudinal direction may be sandwiched between the terminal cover 50 and the lid 12. In this case, it is preferable to provide a separate retaining portion that engages with the lower surface of the lid 12 on the plate surface of the wall portion 13b, or to use the column portion 13c together.

[ Joint Structure of terminal Pin ]

Fig. 7 is a diagram showing the shape of the joint portion 72 of the terminal pin 70. Fig. 7 (a) is a front view showing a shape of the joint portion 72 of the terminal pin 70 when viewed from the front. Fig. 7 (b) is a partially enlarged perspective view showing a state in which the core wire 91 of the lead 90 is soldered to the terminal pin 70.

The engaging portion 72 of the terminal pin 70 of the present embodiment is formed in a U-shape having an open upper portion. Thus, the core wire 91 of the lead 90 can be placed on the joint portion and soldered, and the workability of soldering is improved as compared with the case where the core wire 91 of the lead 90 is soldered through the annular joint portion. The shape of the joint portion 72 may be a shape in which the upper portion of the loop is missing, and may be, for example, a V-shape or コ -shape, in addition to the U-shape of the present embodiment.

While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the scope of the present invention.

Claims (11)

1. An electric motor, comprising:

a stator;

a rotor disposed inside the stator;

a housing that houses the stator and the rotor;

a terminal pin for binding the end of the coil wire;

a lead wire electrically connected to the terminal pin and led out to the outside of the case; and

a clip member that bends and holds the lead wire along an outer surface of the case.

2. The motor according to claim 1,

when the direction along the axial direction of the motor is a longitudinal direction and the direction along the radial direction of the motor is a transverse direction,

the lead wires are led out from the shell along the transverse direction,

the clip member bends and holds the lead wire in the longitudinal direction.

3. The motor according to claim 1 or 2,

the clip member is a frame-like body,

in the lead wire, a part of a range held by the clip member protrudes to the outside of the clip member.

4. The motor according to claim 1 or 2,

the lead is soldered directly to the terminal pin.

5. The motor according to claim 1 or 2,

the housing has a cover member constituting a part of an outer peripheral surface of the housing,

the lead wire is led out from the opening of the cover member to the outside of the housing.

6. The motor according to claim 5,

the cover member has a protruding portion formed by protruding a part of an outer surface of the cover member outward,

the lead is bent along the protruding portion.

7. The motor according to claim 6,

a plurality of the lead wires are provided,

the protruding portion has a partition plate that is a plate-shaped body that partitions the wiring path of each of the leads, and a groove portion that is formed along the wiring path of each of the leads.

8. The motor according to claim 6 or 7,

when the direction along the axial direction of the motor is a longitudinal direction and the direction along the radial direction of the motor is a transverse direction,

the lead wires are led out from the shell along the transverse direction,

the clip member bends and holds the lead wire in the longitudinal direction,

the extension portion has a support surface that supports a root portion of the lead wire drawn out from the cover member so as not to bend the root portion,

when the support surface is an upper surface of the protruding portion and a surface opposite to the support surface is a lower surface of the protruding portion,

the clip member clips the lead wire from a root portion toward a tip end side thereof in order in a longitudinal direction between the clip member and the support surface, in a longitudinal direction between the clip member and a lower surface of the protruding portion, and in a lateral direction between the clip member and an outer surface of the case.

9. The motor according to claim 8,

the lead is bent three times by the cover member and the clip member and held.

10. The motor according to claim 6 or 7,

when the direction along the axial direction of the motor is a longitudinal direction and the direction along the radial direction of the motor is a transverse direction,

the lead wires are led out from the shell along the transverse direction,

the clip member bends and holds the lead wire in the longitudinal direction,

the extension portion has a support surface that supports a root portion of the lead wire drawn out from the cover member so as not to bend the root portion,

the root portion of the lead wire is sandwiched between the support surface and the clamping member in the longitudinal direction,

the lead wire is soldered directly to the terminal pin, or, soldered to another member electrically connected to the terminal pin,

the root portion of the lead is a portion near a portion to which the lead is soldered.

11. The motor according to claim 1 or 2,

the terminal pin has a V-shaped, U-shaped, or コ -shaped joint portion to which a core wire of the lead wire is placed and soldered.

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