TW201306445A - Thin type motor - Google Patents

Abstract

A thin type motor includes a holder, a rotor unit and a driving unit. The driving unit includes a circuit substrate disposed between the holder and the rotor unit, plural induction coils correspondingly spaced with the magnet of the rotor unit and embedded to the circuit substrate, a detection element separately disposed with the induction coil, and a positioning member disposed to a bottom surface of the holder without exposing a top surface. The positioning member is disposed on a bottom surface of the holderwithout exposing the top surface. Not only the phenomenon of short circuit or jam can be prevented to enhance stability, but also the assembly can be conveniently performed to improve manufacture efficiency. Further, the detection element capable of inducing the induction zone of powerful magnetic force at two sides of any magnetic pole border of the magnet ring can, during activation, be ensured to ensure activation.

Description

Thin motor

The present invention relates to a motor device, and more particularly to a thin motor.

Referring to FIG. 1, a "micro motor" invention patent application of the Republic of China Publication No. 201117524 discloses a micro motor 1 comprising a substrate 11, a circuit board 12 coupled to the substrate 11, and a rotor pivoted on the substrate 11. 13, and at least one auxiliary actuator 14.

The circuit board 12 has a coil assembly 121 and a detecting component 122. The rotor 13 has a hub 131 pivoted on the substrate 11, and a permanent magnet 132 disposed on the hub 131. The permanent magnet 132 A plurality of strong magnetic regions 133, and a plurality of weak magnetic regions 134 between the two adjacent strong magnetic regions 133; the auxiliary starting member 14 is between the substrate 11 and the rotor 13 and has a magnetic effect Sheet.

When the auxiliary actuator 14 and the at least one strong magnetic region 133 of the permanent magnet 132 are magnetically attracted to each other to stop the rotation of the rotor 13 , the detecting element 122 can be projected along the axial direction of the hub 131 without any A weak magnetic zone 134 overlaps to achieve an easy-to-start function.

However, since the auxiliary starting member 14 is located between the substrate 11 and the rotor 13, if the auxiliary starting member 14 is affected by the vibration generated when the micromotor 1 is rotated, or the setting time is long When it falls off, it is highly likely that it will be caught by the rotating rotor 13, and the rotor 13 is stuck.

Further, if the auxiliary starting member 14 is disposed on the substrate 11, the occurrence of the above-described rotor 13 jamming can be reduced. However, the vibration generated when the rotor 13 rotates is likely to cause the circuit board 12 to vibrate. The coil assembly 121 is brought into contact with the auxiliary starting member 14 due to vibration to cause a short circuit. In order to avoid short circuit, it is often necessary to cover the auxiliary starting member 14 with an insulating material, which is not only time-consuming and labor-intensive, but also Increase manufacturing costs.

Moreover, the projection of the detecting component 122 does not overlap with any of the weak magnetic regions 134, and only the detecting component 122 can be prevented from sensing the weak magnetic region 134, but the detecting component 122 cannot be ensured to sense the strong magnetic region. 133, therefore, there is no guarantee that the micromotor 1 can be started smoothly.

Accordingly, it is an object of the present invention to provide a thin motor that is smooth to start, easy to assemble, and has high manufacturing efficiency and stability.

Thus, the thin motor of the present invention comprises a base, a rotor unit pivoted to the base, and a drive unit for driving the rotor unit.

The base includes an opposite top surface and a bottom surface; the rotor unit includes a hub pivotally pivotable about its own axis on a top surface of the base, and a hub disposed on the hub and facing the base a magnet ring of a surface, wherein the magnet ring has a plurality of magnetic poles having different polarities and staggered, and a plurality of magnetic poles interposed between each of the two magnetic poles, each magnetic pole having two electrodes adjacent to the other magnetic pole and having a strong magnetic force The zone, the pole junction is located between every two adjacent sensing zones.

The driving unit includes a circuit board disposed between the base and the hub, and a plurality of induction coils embedded in the circuit board corresponding to the magnet ring, and a circuit board disposed on the circuit board at intervals from the induction coil a detecting element located on one side of one of the magnetic pole junctions, and a positioning member disposed on the bottom surface of the base and not exposing the top surface to generate a magnetic attraction with the magnet ring. The detecting component overlaps with the projection of the sensing region with strong magnetic force on the side of the magnetic pole.

The utility model has the beneficial effects that the positioning member is disposed on the bottom surface of the base, which not only can be easily assembled, but also improves the production efficiency, and can avoid the phenomenon of short circuit or jam due to vibration or falling off, thereby improving stability and cooperation. The detecting component is located on one side of any magnetic pole boundary and overlaps with the projection of the sensing area to ensure that the detecting component can sense any magnetic sensitive sensing area at startup to ensure startup.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of FIG.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 2, a first preferred embodiment of the thin motor 2 of the present invention includes a base 21, a rotor unit 22 pivotally mounted to the base 21, and a drive unit 23 for driving the rotor unit 22.

Referring to Figures 2 and 3, the base 21 includes an opposite top surface 211 and a bottom surface 212. The rotor unit 22 includes a hub 221 pivotally pivotable about its own axis L to the base 21, and a setting The hub 221 faces the magnet ring 223 of the top surface 211 of the base 21. The magnet ring 223 has a plurality of poles 224 that are staggered and have different polarities, and a plurality of pole junctions 225 between each of the two poles 224. Each pole 224 has two sensing regions 226 that are adjacent to the other pole 224 and have a stronger magnetic force. The pole junction 225 is located between each two adjacent sensing regions 226.

2, 3, and 4, the driving unit 23 includes a circuit board 231 disposed between the base 21 and the hub 221, and a plurality of induction coils 232 embedded in the circuit board 231 at intervals corresponding to the magnet ring 223. a detecting component 233 disposed on the circuit substrate 231 and located on one side of any of the magnetic pole junctions 225, and a bottom surface 212 disposed on the bottom surface 212 of the base 21 and not exposing the top surface 211 The positioning member 234 can be magnetically excited with the magnet ring 223. In the preferred embodiment, the positioning member 234 is elongated and disposed on the bottom surface 212 of the base 21, and the detecting component 233 is located on the right side of the magnetic pole boundary 225 above the top of FIG. The detecting component 233 can also be located on the left side of the magnetic pole junction 225 above the top of FIG. 4, and the same effect can still be achieved.

A first connection line D1 is defined between the detection element 233 and the axis L, and a second connection line D2 is defined between the magnetic pole boundary 225 adjacent to the detection element 233 and the axis L. The first connection line D1 is defined. An angle θ of not more than 15° is formed between the second line D2.

The positioning member 234 and the magnetic pole 224 of the magnet ring 223 generate a magnetic attraction, and the design of the angle θ between the first connecting line D1 and the second connecting line D2 is not more than 15°, thereby ensuring that the detecting component 233 can As shown in FIG. 4, the polarity of the sensing region 226 with the strong magnetic force of any of the magnetic poles 224 is sensed, so that the induction coil 232 is energized to generate a corresponding polarity, and the rotor unit 22 is smoothly started.

In the preferred embodiment, the detecting element 233 is overlapped with the sensing area 226 located on the right side of the upper magnetic pole boundary 225 in FIG. 4, so that the polarity of the sensing area 226 with strong magnetic force can be sensed, of course, in practical applications. As long as the angle θ between the first connection line D1 and the second connection line D2 is not more than 15°, the detecting element 233 can avoid the magnetic pole boundary 225 with weak magnetic force, and can be surely detected. The polarity of the sensing region 226 having a stronger magnetic force in FIG. 4 is not limited by this embodiment.

Moreover, since the positioning member 234 is located on the bottom surface 212 of the base 21, it is not only easy to assemble, but even if the positioning member 234 is inadvertently separated from the base 21 and falls off, it is only dropped from the base 21, and is not It is attracted by the rotating rotor unit 22, so that the phenomenon that the rotor unit 22 is stuck can be avoided; further, the positioning member 234 is disposed on the bottom surface 212 of the base 21 even if the circuit substrate 231 is vibrated. The yoke is not in contact with the positioning member 234, and generally, the pedestal 21 is made of an insulating material. Therefore, the pedestal 21 can also provide insulation protection of the positioning member 234 to avoid occurrence. The short circuit does not require additional insulation sheets or insulating materials, thereby improving the operational stability and manufacturing efficiency of the thin motor 2.

In order to verify the efficacy of the present invention, the inventors performed the start-up test at different angles θ, and the results are shown in the following table, wherein the positive angle θ is between the second line D2 and the first line D1 as shown in FIG. The angle θ, that is, the angle sandwiched by the second line D2 in the clockwise direction, and the angle of the negative angle θ is the angle of the second line D2 counterclockwise.

Referring to Fig. 4 and Table 1, it can be seen that the starting voltage required for the increase of the angle θ increases, and if the angle θ exceeds the range of plus or minus 20°, the jitter will occur. If it exceeds plus or minus 40°, it will not start. If the angle θ is in the range of plus or minus 15°, only the starting voltage shift of less than 2 volts is required to start the motor 2, so that it should be proved that the first connection D1 and the second connection D2 are not more than 15 The design of the angle θ of ° does help to smoothly start the thin motor 2.

Referring to FIG. 5, the second preferred embodiment of the thin motor 2 of the present invention is substantially the same as the first preferred embodiment. The difference is that the positioning member 234 is elongated and embedded in the base 21. In the bottom surface 212, a better bonding mode is provided to effectively prevent the positioning member 234 from being separated or detached from the base 21.

Referring to FIG. 6, the third preferred embodiment of the thin motor 2 of the present invention is substantially the same as the first preferred embodiment. The difference is that the base 21 is locked in the positioning member 234. Therefore, a bonding mode with better bonding force is provided to effectively prevent the positioning member 234 from being separated from or detached from the base 21.

In summary, the thin motor 2 of the present invention utilizes the magnetic attraction generated by the positioning member 234 and the magnetic pole 224 of the closest magnet ring 223, and the first connection line D1 and the second connection line D2 are not more than 15 The design of the angle θ of ° ensures that the detecting element 233 can sense the polarity of the magnetic sensing region 226 of any magnetic pole 224 to smoothly start the rotor unit 22, ensuring smoothness of starting; and because of the positioning member The 234 is located on the bottom surface 212 of the pedestal 21, so that the manufacturing efficiency can be effectively improved not only in assembly, but also the susceptor 21 can provide insulation protection for the locating member 234, thereby effectively avoiding the circuit substrate 231 and the positioning member 234. A short circuit occurs in contact with each other. Further, if the positioning member 234 is inadvertently separated from the base 21 and falls off, the rotor unit 22 does not become stuck, and the operation of the thin motor 2 is further improved. Therefore, the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2. . . Thin motor

twenty one. . . Pedestal

211. . . Top surface

212. . . Bottom

twenty two. . . Rotor unit

221. . . Wheel hub

223. . . Magnet ring

224. . . magnetic pole

225. . . Magnetic junction

226. . . Sensing area

twenty three. . . Drive unit

231. . . Circuit substrate

232. . . Induction coil

233. . . Detection component

234. . . Positioning member

L. . . Axis

D1. . . First connection

D2. . . Second connection

θ. . . Angle

1 is an exploded perspective view showing the micromotor disclosed in FIG. 3 of the "Micro Motor" invention patent application of the Republic of China Publication No. 201117524;

Figure 2 is an exploded perspective view showing a first preferred embodiment of the thin motor of the present invention;

Figure 3 is a cross-sectional view, assistance to illustrate Figure 2;

4 is a top view showing the positional relationship between the detecting element and the magnetic pole in the first preferred embodiment;

Figure 5 is a cross-sectional view showing a second preferred embodiment of the thin motor of the present invention; and

Figure 6 is a cross-sectional view showing a third preferred embodiment of the thin motor of the present invention.

2. . . Thin motor

twenty one. . . Pedestal

223. . . Magnet ring

224. . . magnetic pole

225. . . Magnetic junction

226. . . Sensing area

232. . . Induction coil

233. . . Detection component

234. . . Positioning member

L. . . Axis

D1. . . First connection

D2. . . Second connection

θ. . . Angle

Claims (6)

A thin motor comprising: a base comprising an opposite top surface and a bottom surface; a rotor unit including a hub pivotally pivotable about a top surface of the base about its own axis, and a hub disposed thereon a magnet ring facing the top surface of the base, wherein the magnet ring has a plurality of magnetic poles of different polarities and staggered, and a plurality of magnetic poles between each two magnetic poles, each magnetic pole having two and the other a sensing region having a magnetic pole adjacent to each other and having a strong magnetic force, wherein the magnetic pole boundary is located between each two adjacent sensing regions; and a driving unit comprising a circuit substrate disposed between the base and the hub, and a plurality of the magnets a ring corresponding to the induction coil embedded in the circuit board, a detecting element disposed on the circuit substrate and spaced apart from one side of one of the magnetic poles, and a bottom portion disposed on the bottom surface of the base A positioning member capable of generating a magnetic attraction with the magnet ring, wherein the detecting element overlaps with a projection of a sensing area having a stronger magnetic force on a side of the magnetic pole. The thin motor of claim 1, wherein a first line is defined between the detecting element and the axis, and a second line is defined between the magnetic pole boundary adjacent to the detecting element and the axis. Forming an angle of not more than 15° between the first connection and the second connection The thin motor of claim 1, wherein the positioning member is adhered to a bottom surface of the base. A thin motor according to claim 1, wherein the positioning member is embedded in a bottom surface of the base. The thin motor of claim 1, wherein the base is snapped into the positioning member. The thin motor according to any one of claims 1 to 5, wherein the positioning member is in the form of a strip.