TW201306444A - 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 on a bottom surface of the holder without exposing a top surface. By utilizing the positioning member capable of generating magnetic attraction effect with the magnet ring, the detection element can accurately induce the magnetic property of the magnet ring so as to smoothly activate the rotor unit. Since the positioning member is disposed on the bottom surface of the holder without exposing the top surface, it can prevent the positioning member from being short circuit or jammed due to vibration or come-off, thereby enhancing the stability and manufacture efficiency.

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 actuator 14 is provided on the substrate 11, the circuit board 12 located between the substrate 11 and the rotor 13 can reduce the occurrence of the occurrence of the rotor 13 being stuck, but when the rotor 13 is rotated The generated vibration is likely to cause the circuit board 12 to vibrate. If the coil assembly 121 of the circuit board 12 is in contact with the auxiliary starting member 14 due to vibration, a short circuit may occur, and in order to avoid a short circuit, it is often required. The auxiliary starting member 14 is covered with an insulating material, which not only takes time and labor, but also increases the manufacturing cost.

Accordingly, it is an object of the present invention to provide a thin motor having high stability and high production efficiency.

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 the base thereof to the base, and a magnet ring disposed on the hub and facing the top surface of the base.

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 a distance from the induction coil The detecting component of the magnet ring is sensed, 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 utility model has the advantages that the positioning component capable of generating a magnetic attraction with the magnet ring enables the detecting component to accurately sense the magnetic property of the magnet ring to smoothly start the rotor unit, and since the positioning component is disposed on the The top surface of the base is not exposed, so that the short-circuit or jam of the positioning member due to vibration or falling off can be avoided, thereby improving stability and manufacturing efficiency.

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.

The base 21 includes an opposite top surface 211 and a bottom surface 212. The rotor unit 22 includes a hub 221 pivotably pivoted about the base 21 thereof, and is disposed on the hub 221 and faces the hub A magnet ring 223 of the top surface 211 of the base 21. The magnet ring 223 has a plurality of magnetic poles 224 which are staggered and have different polarities, and a plurality of magnetic pole junctions 225 which are interposed between the two magnetic poles 224 and have a weak magnetic force. Each pole 224 has a sensing region 226 between the two spaced magnetic pole junctions 225 and having a strong magnetic force.

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 corresponding to the magnet ring 223, and an induction coil 232. The detecting element 233 is disposed on the circuit substrate 231 to sense the polarity of the magnetic pole 224 of the magnet ring 223, and is disposed on the bottom surface 212 of the base 21 and does not expose the top surface 211 to be coupled to the magnet ring 223. A positioning member 234 that generates a magnetic attraction. In the preferred embodiment, the positioning member 234 is elongated and disposed on the bottom surface 212 of the base 21 .

Referring to FIGS. 2 and 3, when the rotor unit 22 stops rotating, the magnetic pole 224 of the magnet ring 223 is attracted by the positioning member 234 capable of generating a magnetic attraction with the magnet ring 223, so that the magnet 224 has a strong magnetic induction region 226. The sensing area 226 of the two magnetic poles 224 of the ring 223 is located above the positioning member 234 to ensure that the detecting element 233 is located below any of the magnetic poles 224 and does not overlap with the projection of any of the magnetic pole junctions 225. Therefore, when the rotor unit 22 is restarted, the detecting component 233 can positively sense the polarity of the sensing region 226 of the magnetic pole 224 of the magnet ring 223, so that the induction coil 232 is energized to generate a corresponding polarity. The rotor unit 22 is smoothly started.

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 only falls from the base 21 and does not fall. The rotor unit 22 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 board 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 for the positioning member 234 to avoid occurrence. Since the short circuit is used, it is not necessary to additionally add an insulating sheet or an insulating material, thereby improving the operational stability and manufacturing efficiency of the thin motor 2.

Referring to FIG. 4, 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. 5, 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 a positioning member 234 capable of generating a magnetic attraction with the magnet ring 223, ensuring that the detecting element 233 is located below any of the magnetic poles 224 and does not interface with any of the magnetic poles 225. The projections are overlapped, and the rotor unit 22 can be smoothly started. Moreover, since the positioning member 234 is located on the bottom surface 212 of the base 21, even if the positioning member 234 is inadvertently separated from the base 21, The phenomenon that the rotor unit 22 is stuck does not occur; further, the positioning member 234 is disposed on the bottom surface 212 of the base 21, and even if the circuit board 231 is deflected due to vibration, the positioning member is not The 234 is in contact with each other, and the susceptor 21 can also provide insulation protection of the positioning member 234 to effectively avoid short circuit, thereby improving the operational stability and manufacturing efficiency of the thin motor 2, so that 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

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 top view, assistance to illustrate Figure 2;

Figure 4 is a cross-sectional view showing a second preferred embodiment of the thin motor of the present invention; and

Figure 5 is a cross-sectional view showing a third preferred embodiment of the thin motor of the present invention.

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

Claims (5)

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; and a driving unit comprising: a circuit board disposed between the base and the hub; and an induction coil embedded in the circuit board corresponding to the magnet ring, a detecting element disposed on the circuit substrate at a distance from the sensing coil to sense the magnet ring, and a magnetic field disposed on the bottom surface of the base and not exposing the top surface to generate a magnetic attraction with the magnet ring Positioning piece. 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 4, wherein the positioning member is in the form of a strip.