Stepping lighting-control motor structure

Abstract

To provide a stepping lighting-control motor structure capable of securing reliability of a structure and also improving assembly efficiency.SOLUTION: A stepping lighting-control motor structure is provided with a bobbin 2 provided with a coil, a terminal base 21 on a side peripheral wall of the bobbin, and two wiring slots, corresponding to wiring tabs, at the terminal base. The stepping lighting-control motor structure further includes an ejector rod which includes a magnetically permeable ring holder 51 provided inside the bobbin, a rotary assembly provided rotatably inside the magnetically permeable ring holder and also provided with a screw hole in an axial direction, and a screw part 7a and a displacement part 7b, and is driven as the rotary assembly rotates to move in the axial direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to the technical field of motors, and in particular to a stepping dimming motor structure. [Background technology]

[0002] As one of the important components of a vehicle, car lights can provide effective lighting function when driving at night and ensure good driving visibility for the driver. In order to improve the lighting effect, some car headlights are equipped with corresponding dimming motors to adjust the headlight irradiation direction or irradiation angle.

[0003] The dimmable stepping motor mainly includes an ejector rod with a threaded portion, a stator member with a coil, and a rotor member with a magnetic material, the lead end of the coil is connected to a circuit board in a socket by welding, so that when the circuit board energizes the coil, a corresponding magnetic field is generated in the stator member to drive the rotor member to rotate, the rotor member has a threaded hole along its axial direction, the threaded portion of the ejector rod is screwed into the threaded hole, and the case has a slide groove that limits the rotation of the ejector rod about its own axis, so that the rotation of the rotor member drives the ejector rod to move linearly relative to the case. However, many parts in conventional dimmable stepping motors, such as the case and stator member, the lead end of the coil, and the circuit board, are assembled by welding, which not only has low assembly efficiency but also requires the welding points to be removed and rewelded after cracking and falling off, making maintenance difficult and unfriendly to the environment. Summary of the Invention

[0004] SUMMARY OF THE INVENTION The present invention aims to solve the problem that when many parts in a dimmable stepping motor in the prior art are connected by welding, not only is assembly efficiency low, but subsequent maintenance is also disadvantageous.

[0005] In order to solve the above problems, the present invention provides a stepping dimming motor structure including a case, a bobbin provided with a coil wound around its periphery, the bobbin having a terminal block on its side peripheral wall, the terminal block having two wiring slots corresponding to wiring tabs, the two lead ends of the coil passing through the two wiring slots of the terminal block, the wiring tab having an insertion end at one end and a terminal at the other end, the insertion end of which is inserted into the corresponding wiring slot to fasten and electrically connect to the lead ends of the coil; a magnetic permeable ring holder provided inside the bobbin and configured to generate a corresponding magnetic field based on the energization state of the coil; a rotor assembly rotatably provided inside the magnetic ring holder, driven to rotate by a magnetic field generated by the magnetic ring holder, and provided with a screw hole along the axial direction; A stepping dimming motor structure is provided, further including an ejector rod including a threaded portion that is screwed into the screw hole and a displacement portion provided with a position limiting member, wherein the bobbin or the case is provided with a slide groove along the axial direction, the position limiting member is slidably fitted into the slide groove to realize circumferential position limiting for the ejector rod, and further including an ejector rod that drives the ejector rod to move axially by rotation of the rotor assembly.

[0006] When using the above scheme, the coil is powered by the wiring tab on the terminal block, and changes in the current in the coil excite the magnetic ring holder to generate a changed magnetic field, which in turn drives the rotor assembly to rotate. The rotor assembly can drive the ejector rod to move axially through a movable threaded engagement with the ejector rod, making the overall structure simple, compact, and easy to assemble. Furthermore, in the above scheme, by providing two wiring slots on the terminal block, the insertion and engagement of the wiring tabs with the wiring slots can achieve a clamping action on the lead end of the coil and an electrical connection between the lead end of the coil and the wiring tab. This ensures structural reliability and improves assembly efficiency compared to the welding method used in prior art.

[0007] In a preferred scheme, a through-hole is provided on the side of the wiring slot close to the corresponding coil, and the wiring groove extends to the notch position of the wiring slot. The insertion end is two parallel insertion pins, and an insertion groove is formed between the two insertion pins. The two insertion pins are inserted into the wiring slot in an interference fit manner so that the lead end of the coil is sandwiched between the two insertion pins in the insertion groove. The provided wiring groove allows the lead end of the coil to be easily passed through the notch position of the wiring slot into the interior of the wiring slot, and is further effectively clamped by the insertion groove located between the two insertion pins.

[0008] In a preferred scheme, bumps are provided on opposite sides of the two insertion pins, and the width of the bumps gradually decreases along the insertion direction of the wiring tab. The width of the notch of the insertion groove gradually decreases as it approaches the groove bottom. A placement area for accommodating the lead end of the coil is provided at the groove bottom. After using this structure, as the wiring tab is inserted into the wiring slot, the bumps tightly abut against the slot wall of the wiring slot, ensuring the insertion end of the wiring tab and the wiring slot are closely fitted by the bumps to prevent them from falling off. At the same time, the bumps guide the two insertion pins to move closer to each other, thereby better clamping the lead end of the coil. Furthermore, since the width of the notch of the insertion groove gradually decreases as it approaches the groove bottom, the lead end of the coil comes into contact with the opposite sides of the two insertion pins when moving from the notch of the insertion groove to the groove bottom, which scrapes off the insulating paint on the surface of the lead end. After the lead end enters the placement area, an electrical connection with the insertion end of the wiring tab is established.

[0009] In a preferred scheme, the rotor assembly is rotatably connected inside the magnetic ring holder by a bearing, and includes a rotor sleeve and a magnetic ring, the screw hole is provided in the rotor sleeve and passes through it along the axial direction, the magnetic ring is fixedly sleeve-connected to the rotor sleeve, and the position of the magnetic ring corresponds to the position of the magnetic ring holder, so that the rotor assembly can rotate under the action of the magnetic field generated by the magnetic ring holder.

[0010] In a preferred scheme, there are two bobbins in the case, and they are arranged coaxially along the front-to-rear direction, the terminal blocks of the two bobbins are arranged adjacent to each other, there are two magnetic permeability ring holders, and they are arranged coaxially along the front-to-rear direction and are respectively arranged inside the two bobbins, and there are two magnetic rings, and they are fitted onto the front and rear ends of the rotor sleeve, respectively, and the positions of the two magnetic rings correspond to the positions of the two magnetic permeability ring holders, thereby realizing more accurate control of the rotation angle of the rotor assembly.

[0011] In a preferred scheme, the permeable ring holder includes an annular backing plate and a plurality of pole pieces distributed along the circumferential direction of the backing plate, the backing plates of the two permeable ring holders are tightly connected to each other, and complementary positioning protrusions and positioning holes are provided on the opposite sides of the two backing plates, thereby realizing accurate assembly between the two permeable ring holders.

[0012] In a preferred scheme, the front and rear ends of the rotor sleeve are provided with annular stepped grooves to which the magnetic ring is connected, an insertion key is provided on the inner peripheral wall of the magnetic ring, and a key groove is provided in the annular stepped groove to which the insertion key is tightly fitted, thereby realizing circumferential fixation of the rotor sleeve and the magnetic ring, and a protruding locking hook is provided on the side of the annular stepped groove away from the center of the rotor sleeve, which abuts against the magnetic ring to achieve axial fixation of the magnetic ring, thereby ensuring the stability of the connection between the rotor sleeve and the magnetic ring, preventing loosening and detachment between the rotor sleeve and the magnetic ring, and making assembly easy.

[0013] In a preferred scheme, the case further includes a socket, and a mounting portion is provided in the center of the case at a position corresponding to the terminal block, into which the socket is inserted in a front-to-rear or back-to-front direction. The terminals of the four wiring tabs are distributed from left to right, with the spacing between the terminals of the two wiring tabs on the left equal to the spacing between the terminals of the two wiring tabs on the right. The socket is provided with power supply pins corresponding to the terminals of the wiring tabs, one for each. Therefore, when the socket is inserted into the mounting portion in a front-to-rear or back-to-front direction, all of the power supply pins in the socket can be matched with the terminals of the four wiring tabs, making it easy for users to choose and use them freely.

[0014] In a preferred scheme, a magnetic permeability ring is provided at the front and rear of the case, respectively, and both the magnetic permeability ring holder and the magnetic permeability ring are provided with pole pieces distributed in the circumferential direction, and the pole pieces of the magnetic permeability ring at the front of the case and the pole pieces of the magnetic permeability ring holder located at the front side are alternately arranged, and the pole pieces of the magnetic permeability ring at the rear of the case and the pole pieces of the magnetic permeability ring holder located at the rear side are alternately arranged, so that after the coil is energized, the magnetic permeability ring holder and the magnetic permeability ring can generate a strong magnetic field inside the case.

[0015] In a preferred scheme, the end of the displacement portion of the ejector rod extends from the front side of the case, the front end surface of the case is provided with a plurality of locking portions distributed circumferentially, and the front side of the case is provided with a cover having a plurality of long holes distributed circumferentially, and the cover is fixed to the front side of the case by twisting and deforming after the locking portions pass through the long holes, and the cover provides support and protection for the displacement portion of the ejector rod. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is an overall schematic diagram of a stepping dimming motor structure. [Figure 2] 10 is a schematic diagram of the mating of the power supply pin and the terminal of the stepping dimming motor structure. FIG. [Figure 3] FIG. 10 is a schematic diagram of the stepping dimming motor structure after the socket is hidden. [Figure 4] 4 is a schematic cross-sectional view taken along the line XX in FIG. 3. [Figure 5] FIG. 5 is a partially enlarged schematic view of a Y region in FIG. [Figure 6] FIG. 1 is a schematic diagram of two bobbins in a stepping dimming motor structure. [Figure 7] FIG. 10 is a schematic diagram of a wiring tab of a stepping dimming motor structure. [Figure 8] FIG. 1 is a schematic diagram of two magnetically permeable ring holders in a stepping dimming motor structure. [Figure 9] FIG. 1 is a schematic diagram of a rotor assembly of a stepping dimming motor structure. [Figure 10] FIG. 10 is a schematic diagram of an ejector rod having a stepping dimming motor structure. [Figure 11] FIG. 10 is a schematic diagram of a cover and a case of a stepping dimming motor structure. [Figure 12] 1A is a schematic diagram of the position of the magnetic permeability ring and magnetic permeability ring holder of the stepping dimming motor structure (corresponding to the rear of the case); [Figure 13] 1B is a schematic diagram of the position of the magnetic permeability ring and magnetic permeability ring holder of the stepping dimming motor structure (corresponding to the front of the case); DETAILED DESCRIPTION OF THE INVENTION

[0017] In order to facilitate a clearer understanding of the above-mentioned objectives, features, and advantages of the present invention, the technical means in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be obtained based on the embodiments of the present invention without the need for creative efforts by those skilled in the art are within the scope of protection of the present invention. Furthermore, all directional indications (e.g., up, down, left, right, front, rear, in, out) in the embodiments of the present invention are merely intended to describe the relative positional relationships and movement situations between components in a specific posture (as shown in the drawings), and when the specific posture changes, the directional indications will also change accordingly.

[0018] As shown in FIGS. 1 to 13, the stepping dimming motor structure including the case 1 according to the embodiment of the present invention includes: a bobbin (2) having an annular coil (4) wound around its periphery, the bobbin (2) having a terminal block (21) on its side peripheral wall, the terminal block (21) having two wiring slots (22) corresponding to wiring tabs (3), the two lead ends of the coil (4) passing through the two wiring slots (22) of the terminal block (21), the wiring tabs (3) having one insertion end and the other terminal, the insertion end of which is inserted into the corresponding wiring slot (22) to fasten and electrically connect to the lead ends of the coil (4); a magnetic permeable ring holder 51 provided inside the bobbin 2 and generating a corresponding magnetic field based on the current-carrying state of the coil 4; a rotor assembly 6 rotatably provided inside the magnetic permeable ring holder 51, driven to rotate by the magnetic field generated by the magnetic permeable ring holder 51, and provided with a screw hole 61 a along the axial direction; The ejector rod 7 includes a threaded portion 7a that is screwed into the screw hole 61a and a displacement portion 7b that is provided with a position limiting member 71, and the bobbin 2 or the case 1 is provided with a slide groove 23 that runs along the axial direction, and the position limiting member 71 is slidably fitted into the slide groove 23 to realize circumferential position limiting for the ejector rod 7, and further includes an ejector rod 7 that drives the ejector rod 7 to move axially by rotation of the rotor assembly 6.

[0019] When using the above scheme, the wiring tab 3 on the terminal block 21 supplies power to the coil 4, and a change in current in the coil 4 excites the magnetic ring holder 51 to generate a changed magnetic field, which in turn drives the rotor assembly 6 to rotate. The rotor assembly 6 can drive the ejector rod 7 to move axially through its movable threaded engagement with the ejector rod 7, making the overall structure simple, compact, and easy to assemble. Furthermore, in the above scheme, the two wiring slots 22 provided on the terminal block 21 can be inserted and fitted into the wiring tab 3 to clamp the lead end of the coil 4 and electrically connect the lead end of the coil 4 to the wiring tab 3. This ensures structural reliability and improves assembly efficiency compared to the welding method used in the prior art.

[0020] For a clearer explanation, referring to FIG. 1, the axis of the case 1 is set along the front-to-rear direction. In one embodiment, only one bobbin 2 may be provided in the case 1, and correspondingly, only one magnetic ring holder 51 is provided. The main body structure of the magnetic ring holder 51 is as shown in the prior art, specifically, it includes an annular support plate 511 and a plurality of pole pieces 53 distributed along the circumferential direction of the support plate 511. After the coil 4 is energized, the corresponding pole pieces 53 of the magnetic ring holder 51 can form a magnetic field inside the magnetic ring holder 51, driving the rotor assembly 6 to rotate.

[0021] As shown in Figures 4 and 9, the rotor assembly 6 is rotatably connected inside the magnetic ring holder 51 by a bearing 8, and includes a rotor sleeve 61 and a magnetic ring 62, a screw hole 61a is provided in the center of the rotor sleeve 61 and penetrates along the axial direction, the magnetic ring 62 is fixedly sleeve-connected to the rotor sleeve 61, and the position of the magnetic ring 62 corresponds to the position of the magnetic ring holder 51, so that the rotor assembly 6 can rotate under the action of the magnetic field generated by the magnetic ring holder 51. In order to improve the connection stability between the rotor sleeve 61 and the magnetic ring 62, the front and rear ends of the rotor sleeve 61 are provided with annular stepped grooves 61c, to which the magnetic ring 62 is connected. An insertion key 62a is provided on the inner wall of the magnetic ring 62, and a key groove 61b is provided in the annular stepped groove 61c, into which the insertion key 62a is tightly fitted, thereby realizing circumferential fixation of the rotor sleeve 61 and the magnetic ring 62. A protruding locking hook 61d is provided on the side of the annular stepped groove 61c away from the center of the rotor sleeve 61. The locking hook 61d abuts against the magnetic ring 62 to achieve axial fixation of the magnetic ring 62, thereby ensuring connection stability between the rotor sleeve 61 and the magnetic ring 62, preventing loosening or falling off between the rotor sleeve 61 and the magnetic ring 62, and making assembly easier.

[0022] To achieve more precise control of the rotation angle of the rotor assembly 6, in this embodiment, there are two bobbins 2 in the case 1, and they are arranged along the front-to-rear direction, the terminal blocks 21 of the two bobbins 2 are arranged adjacent to each other, there are two magnetic permeable ring holders 51, and they are arranged along the front-to-rear direction and are respectively provided inside the two bobbins 2, and there are two magnetic rings 62, and they are fitted onto the front and rear ends of the rotor sleeve 61, respectively, and the positions of the two magnetic rings 62 correspond to the positions of the two magnetic permeable ring holders 51. By supplying power to the coils 4 of the two bobbins 2 respectively, the two magnetic permeable ring holders 51 each generate a magnetic field, thereby achieving more precise control of the rotation angle of the rotor assembly 6.

[0023] In this embodiment, the support plates 511 of the two magnetic permeable ring holders 51 are tightly connected to each other, and complementary positioning protrusions 512 and positioning holes 513 are provided on the opposing sides of the two support plates 511. As shown in FIG. 8, the support plate 511 located on the front side has positioning protrusions 512 facing rearward at the upper left and lower right positions, and positioning holes 513 at the lower left and upper right positions. The support plate 511 located on the rear side has positioning holes 513 at the upper left and lower right positions, and positioning protrusions 512 facing frontward at the lower left and upper right positions, thereby realizing accurate assembly of the two magnetic permeable ring holders 51.

[0024] As shown in Figures 12 and 13, as an improvement to this embodiment, permeable rings 52 are provided at the front and rear of the case 1, and the permeable rings 52 are provided with pole pieces 53 distributed circumferentially. As described above, the permeable ring holder 51 is also provided with pole pieces 53 distributed circumferentially. The pole pieces 53 of the permeable ring 52 at the front of the case 1 are arranged alternately with the pole pieces 53 of the permeable ring holder 51 located at the front, and the pole pieces 53 of the permeable ring 52 at the rear of the case 1 are arranged alternately with the pole pieces 53 of the permeable ring holder 51 located at the rear. As a result, after the coil is energized, the permeable ring holder 51 and the permeable ring 52 can generate a strong magnetic field inside the case 1.

[0025] As an extension of this embodiment, the above scheme further includes a socket 9, and a mounting portion 1b is provided in the center of the case 1 at a position corresponding to the terminal block 21, into which the socket 9 is inserted in a front-to-rear or back-to-front direction. The terminals of the wiring tabs 3 are two parallel terminal pins 32, and the four terminals of the wiring tabs 3 are distributed from left to right, with the spacing between the two terminals of the wiring tabs 3 on the left equal to the spacing between the two terminals of the wiring tabs 3 on the right. The socket 9 is provided with power supply pins 91 corresponding to each terminal of the wiring tabs 3, and the power supply pins 91 are inserted between the two terminal pins 32 of the terminals of the wiring tabs 3 to achieve electrical connection. When the socket 9 is inserted into the mounting portion 1b in a front-to-rear or back-to-front direction, the power supply pins 91 in the socket 9 can all fit the terminals of the four wiring tabs 3, allowing users to freely select and use them. In addition, a grounding tab 10 is provided on the left side of the terminal block 21 of the bobbin 2 located at the front side, and a grounding tab 10 is provided on the right side of the terminal block 21 of the bobbin 2 located at the rear side, and a grounding pin whose position corresponds to the grounding tab 10 is provided in the socket 9.

[0026] 3 and 6, in this embodiment, the terminal block 21 is located at the upper part of the side wall of the bobbin 2, and two wiring slots 22 are provided on the left and right parts of the upper end surface of the terminal block 21. As an improvement to the terminal block 21, a through-hole wiring groove 24 is provided on the side of the wiring slot 22 adjacent to the corresponding coil 4, and the wiring groove 24 extends upward to the notch position of the wiring slot 22. The insertion ends of the wiring tab 3 are two parallel insertion pins 31, and an insertion groove 31a is formed between the two insertion pins 31. The two insertion pins 31 are inserted into the wiring slot 22 by an interference fit so that the lead end of the coil 4 is sandwiched within the insertion groove 31a between the two insertion pins 31. The provided wire groove 24 makes it easy to pass the lead end of the coil 4 into the wiring slot 22 from the notch position of the wiring slot 22 and is further effectively clamped by the insertion groove 31a of the wiring tab 3.

[0027] As shown in FIG. 7, bumps 31c are provided on opposite sides of the two insertion pins 31, and the width of the bumps 31c gradually decreases along the insertion direction of the wiring tab 3, and the width of the notch of the insertion groove 31a gradually decreases along the direction approaching the groove bottom, and a placement area 31b for accommodating the lead end of the coil 4 is provided at the groove bottom of the insertion groove 31a. After using the above structure, as the wiring tab 3 is inserted into the wiring slot 22, the bumps 31c come into close contact with the slot wall of the wiring slot 22, and the bumps 31c connect the insertion end of the wiring tab 3 and the wiring slot 22. While ensuring close contact with the lot 22 and preventing it from falling off, the bumps 31c guide the two insertion pins 31 closer to each other, thereby achieving better clamping of the lead end of the coil 4. Furthermore, since the width of the notch of the insertion groove 31a gradually decreases in the direction approaching the groove bottom, the lead end of the coil 4 comes into contact with the opposing sides of the two insertion pins 31 when moving from the notch of the insertion groove 31a to the groove bottom, and the insulating paint on the surface of the lead end is scraped off. After the lead end enters the placement area 31b, an electrical connection with the insertion end of the wiring tab 3 can be achieved.

[0028] As shown in FIG. 10, in this embodiment, the position limiting member 71 is a cylindrical pin, and the axis of the cylindrical pin is perpendicular to the axis of the ejector rod 7, so that the cylindrical pin and the slide groove 23 are in line contact, thereby reducing the risk of the ejector rod 7 sticking and providing a simple and reliable structure.

[0029] As shown in FIG. 11 , in this embodiment, the end of the displacement portion 7 b of the ejector rod 7 extends from the front side of the case 1, and a plurality of locking portions 1 a are provided on the front end face of the case 1 and distributed circumferentially. A cover 11 having a plurality of elongated holes 11 a distributed circumferentially is provided on the front side of the case 1, and the locking portions 1 a pass through the elongated holes 11 a and then are twisted and deformed, thereby fixing the cover 11 to the front side of the case 1, and the cover 11 provides support and protection for the displacement portion 7 b of the ejector rod 7.

[0030] Although the present disclosure has been disclosed as above, the scope of protection of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and all of these changes and modifications are included in the scope of protection of the invention. [Explanation of symbols]

[0031] 1 case, 1a Locking part, 1b Mounting part, 11 covers, 11a long hole, 2 bobbins, 21 terminal block, 22 wiring slots, 23 slide groove, 24 Wire passage groove, 3 Wiring tabs, 31 Insertion pin, 31a insertion groove, 31b placement area, 31c bump, 32 terminal pins, 4 coils, 51 Magnetically permeable ring holder, 511 receiving plate, 512 positioning protrusion, 513 positioning holes, 52 permeable ring, 53 pole piece, 6 rotor assembly, 61 rotor sleeve, 61a screw hole, 61b keyway, 61c Annular stepped groove, 61d locking hook, 62 magnetic rings, 62a insert key, 7 Ejector rod, 7a Threaded part, 7b displacement part, 71 position limiting member, 8 bearings, 9 sockets, 91 power supply pin, 10 Grounding tab.

Claims

1. A stepping dimming motor structure including a case (1), a bobbin (2) provided with a coil (4) wound around its circumferential direction, a terminal block (21) provided on a side peripheral wall of the bobbin (2), the terminal block (21) having two wiring slots (22) corresponding to wiring tabs (3), two lead ends of the coil (4) passing through the two wiring slots (22) of the terminal block (21), one end of the wiring tab (3) being an insertion end and the other end being a terminal, the insertion end being inserted into the corresponding wiring slot (22) to achieve fastening and electrical connection to the lead ends of the coil (4); a magnetic permeable ring holder (51) provided inside the bobbin (2) and generating a corresponding magnetic field based on the current-carrying state of the coil (4); a rotor assembly (6) rotatably provided inside the magnetic permeable ring holder (51), driven to rotate by a magnetic field generated by the magnetic permeable ring holder (51), and provided with a screw hole (61 a) along the axial direction; an ejector rod (7) including a threaded portion (7a) screwed into the screw hole (61a) and a displacement portion (7b) provided with a position limiting member (71); a slide groove (23) along the axial direction is provided in the bobbin (2) or the case (1); the position limiting member (71) is slidably fitted into the slide groove (23) to realize a circumferential position limit for the ejector rod (7); and an ejector rod (7) that drives the ejector rod (7) to move in the axial direction by rotation of the rotor assembly (6) is provided in the case (1). Stepping dimming motor structure.

2. A through-hole wire-passing groove (24) is provided on the side of the wiring slot (22) adjacent to the corresponding coil (4), and the wire-passing groove (24) extends to the notch position of the wiring slot (22). The insertion ends are two parallel insertion pins (31), and an insertion groove (31a) is formed between the two insertion pins (31). The two insertion pins (31) are inserted into the wiring slot (22) in an interference fit manner so that the lead end of the coil (4) is sandwiched within the insertion groove (31a) between the two insertion pins (31).

2. The stepping dimming motor structure according to claim 1.

3. A bump (31c) is provided on each of the opposite sides of the two insertion pins (31), and the width of the bump (31c) gradually decreases along the insertion direction of the wiring tab (3), and the width of the notch of the insertion groove (31a) gradually decreases along the direction approaching the groove bottom, and a placement area (31b) for accommodating the lead end of the coil (4) is provided at the groove bottom of the insertion groove (31a).

3. The stepping dimming motor structure according to claim 2.

4. The rotor assembly (6) is rotatably connected to the inside of the magnetic permeable ring holder (51) by a bearing (8), and includes a rotor sleeve (61) and a magnetic ring (62), the screw hole (61a) is provided in the rotor sleeve (61) and penetrates it along the axial direction, the magnetic ring (62) is fixedly sleeve-connected to the rotor sleeve (61), and the position of the magnetic ring (62) corresponds to the position of the magnetic permeable ring holder (51).

4. The stepping dimming motor structure according to claim 1.

5. The case (1) contains two bobbins (2), which are arranged coaxially along the front-rear direction, the terminal blocks (21) of the two bobbins (2) are provided adjacent to each other, the case (1) contains two magnetic permeable ring holders (51), which are arranged coaxially along the front-rear direction and are provided inside the two bobbins (2), the case (1) contains two magnetic rings (62), which are fitted onto the front and rear ends of the rotor sleeve (61), respectively, and the positions of the two magnetic rings (62) correspond to the positions of the two magnetic permeable ring holders (51).

5. The stepping dimming motor structure according to claim 4.

6. The magnetic permeability ring holder (51) includes an annular support plate (511) and a plurality of pole pieces (53) distributed along the circumferential direction of the support plate (511), and the support plates (511) of the two magnetic permeability ring holders (51) are tightly connected to each other, and complementary positioning protrusions (512) and positioning holes (513) are provided on opposing sides of the two support plates (511).

6. The stepping dimming motor structure according to claim 5.

7. The rotor sleeve (61) has an annular stepped groove (61c) at its front end and rear end, to which the magnetic ring (62) is connected, an insertion key (62a) is provided on the inner peripheral wall of the magnetic ring (62), and the annular stepped groove (61c) has a key groove (61b) into which the insertion key (62a) is tightly fitted, thereby realizing circumferential fixation of the rotor sleeve (61) and the magnetic ring (62). The annular stepped groove (61c) has a protruding locking hook (61d) on the side away from the center of the rotor sleeve (61), which abuts against the magnetic ring (62) to realize axial fixation of the magnetic ring (62).

6. The stepping dimming motor structure according to claim 5.

8. The case (1) further includes a socket (9), and a mounting portion (1b) is provided at a position corresponding to the terminal block (21) in the center of the case (1) to insert the socket (9) in a front-to-back or back-to-front direction. The terminals of the four wiring tabs (3) are distributed from left to right, and the spacing between the terminals of the two wiring tabs (3) located on the left side is equal to the spacing between the terminals of the two wiring tabs (3) located on the right side. Power supply pins (91) are provided in the socket (9) so as to correspond to the terminals of the wiring tabs (3) one by one.

6. The stepping dimming motor structure according to claim 5.

9. A magnetic permeability ring (52) is provided at the front and rear of the case (1), and both the magnetic permeability ring holder (51) and the magnetic permeability ring (52) are provided with pole pieces (53) distributed in the circumferential direction, and the pole pieces (53) of the magnetic permeability ring (52) at the front of the case (1) and the pole pieces (53) of the magnetic permeability ring holder (51) located at the front side are arranged alternately, and the pole pieces (53) of the magnetic permeability ring (52) at the rear of the case (1) and the pole pieces (53) of the magnetic permeability ring holder (51) located at the rear side are arranged alternately.

6. The stepping dimming motor structure according to claim 5.

10. An end of the displacement portion (7b) of the ejector rod (7) extends from the front side of the case (1), a plurality of locking portions (1a) are provided on the front end surface of the case (1) distributed along the circumferential direction, and a cover (11) having a plurality of elongated holes (11a) distributed along the circumferential direction is provided on the front side of the case (1), and the locking portions (1a) pass through the elongated holes (11a) and then are torsionally deformed, thereby fixing the cover (11) to the front side of the case (1).

2. The stepping dimming motor structure according to claim 1.

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