TWI303512B - Auto focusing and zooming device, actuator and voice coil motor thereof - Google Patents

Description

13035^ fl.doc/006 13035^ fl.doc/006 95-11-10

IX. Description of the Invention: [Technical Field] The present invention relates to an automatic focus zoom device which is related to a high efficiency and automatic automatic water supply, under-focusing, actuator and Voice coil motor. [Prior Art] Hand digital cameras have become an indispensable part of modern people and the T-machines of the machine are more and more popular. The movement of the optical lens of the conventional phase shifter can be made by the mechanical actuator of the micro-actuator of the moon, which is an important subject of the present invention. Fig. 1 is a schematic cross-sectional view showing a conventional microactuator. Please singularly i == actuator HK) including housing 52, 1 permanent _ 51 = diagram drive coil 54 and carrier 56. Among them, the outer casing & 舜 5 卜 53 and the drive coil 54, and permanent magnets

When S% is disposed in the direction in which the permanent magnet 51 and the carrier 1 = the other side of the paper, the flow of the human drive coil 54 is known by law, the drive coil 54 is forced downward and moved downward. Conversely: η two to indicate the direction of the paper flow when the human drive coil 54, drive _ % Tian ^ i3 〇 3m_6 95-11-1 〇

Force to move up. - 'Continuously referring to FIG. 1, when the microactuator loo is applied to the focus zoom device of the mobile phone camera module, the drive coil 54 is usually fixed to the carrier 56 for carrying a lens (not shown) to The lens on the carrier 56 is moved synchronously with the drive coil to complete zooming or focusing. Although the driving coil 54 •= has the strongest magnetic field at the position, when the driving coil 54 moves up and down, the magnetic lines of force passing through the upper and lower regions thereof are not orthogonal to the flow direction of the current in the driving coil 54 _, so that the driving coil 54 is The Lawrence force received is inconsistent, thus causing the displacement or moving speed of the drive coil to be inconsistent with expectations. In addition to this, Japan's Toshiba & Division has proposed an electrostatic microlens actuator that controls the multilayer comb electrode (multi_layer comb_electrode) in an electrostatically actuated manner. However, the movement mode is complicated, the linear acceleration is poor, and the optical axis has an eccentricity (〇 ffset) during the movement of the objective lens. In addition, the conventional focus zoom device, after zooming or focusing, must hold the current and supply current to the microactuator to maintain it at the zoom point or focus. This is a waste of energy for portable electronic devices with limited power. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a voice coil motor that has a small space and that the current flowing into the drive coil of the voice coil motor is orthogonal to the magnetic lines of force, thereby improving the The working efficiency of the voice coil motor. Another object of the present invention is to provide an actuator that can automatically lock when the power supply is supplied. ' I3035H doc/006 95-11-10 The next day is replacing 1 1.......〇......................—: One ==: =::=3⁄4 The present invention proposes a voice coil motor which is mainly composed of a ring and an outer casing. Wherein, the first permanent magnet has a magnetic side and a side adjacent to the transmitting end of the magnetic field, and the driving coil is the driving coil for receiving the current. External solid; = permanent magnet and drive coil, and first permanent magnet In the preferred embodiment of the invention, the outer casing is, for example, an iron. In a preferred embodiment of the present invention, the voice coil motor described above may further enclose the magnet, and the driving coil is located between the first permanent magnet permanent magnets and the second permanent magnet and the first permanent magnet are generated. The direction of the magnetic field is the same. The present invention also proposes an actuator which is mainly composed of the above-mentioned first permanent /, the above-mentioned driving coil and the above-mentioned outer casing. The drive coil described above is fixed to the outside of the carrier. In addition, the carrier is adjacent == configuration 'and is adapted to be away from or close to the first - permanent one. The stomach is in a preferred embodiment of the invention, and the actuator described above may further comprise a magnetic component Inside. In one embodiment, the magnetically permeable element is, for example, a spherical or circular sheet. In a preferred embodiment of the present invention, the actuator may further include a 13033⁄43⁄4 twfl.doc/006 95-11-10, a replacement layer of a magnetically permeable material layer disposed on the outer casing, and Located between the outer and the inner, and the magnetic conductive material layer has a plurality of convex patterns on the surface of the driving coil. When the drive coil is receiving current, the carrier is magnetically attached to the layer of magnetically permeable material by the magnetically permeable element described above. In a preferred embodiment of the present description, the actuator may further include a suspension mechanism secured to the housing and coupled to the carrier for supporting the carrier.

In a preferred embodiment of the present invention, the actuator may further include a permanent magnet, wherein the second permanent magnet has the same magnetic field direction as the first permanent magnet, and the above-mentioned driving coil is two permanent Between the magnets. You music / brother Xi Jia proposed - a voice coil motor, mainly composed of a number of permanent magnets, == line _ and the outer casing. Each of the permanent magnets has a chirp emitting end, and the magnetic field emitting ends are all oriented in the same direction. Long between adjacent permanent magnets' and these drive lines

And the drive coil: In addition, the outer casing is covered with these permanent magnets, and the two permanent magnets are fixed to the outer casing. The above-mentioned outer casing is, for example, a plurality of birds, and the zoom device is mainly composed of an upper mirror and the above-mentioned outer casing: a member, an outer portion of the carrier, and a carrier inside; the second drive: is fixed to Within this housing space. In addition, this is: the 曰 lens is the card 13035^, 1:wfl.d〇c/〇〇6 95-11-10 In a preferred embodiment of the invention, the above-mentioned automatic 隹 Γ Γ Γ Γ The components 'and the magnetically permeable elements are respectively in the one-off, and the magnetically permeable elements are, for example, in the preferred embodiment of the month, the above-mentioned autofocus zooming device y to include a layer of magnetically permeable material, disposed in the above-mentioned outer casing The upper surface of the magnetically permeable material layer has a plurality of convex patterns on the surface of the conductive material layer. When the drive coils are receiving current, the above-mentioned carriers are magnetically attached to the layer of magnetically permeable material by magnetically permeable elements embedded therein, respectively. In a preferred embodiment of the present invention, the above-described autofocus zooming apparatus may further include a suspension mechanism fixed to the outer casing and coupled to the carrier to facilitate supporting the carriers. In the voice coil motor of the present invention, since the driving coil is disposed on the adjacent side of the magnetic field emitting end of the permanent magnet, when the driving coil is subjected to the electromagnetic force to generate motion, the current direction to the driving coil can be orthogonal to the magnetic line of force. 'Thereby increasing the overall driving force of the voice coil motor. In addition, since the actuator of the present invention can still perform the automatic lock position in the case of power failure, when the actuator is applied to the auto focus zoom device, the auto focus zoom device can be cut off after zooming or focusing is completed. The current flowing into the coil is passed to save energy. The above and other objects, features, and advantages of the present invention will become more apparent <RTIgt; 13035^ twfl.doc/006 95-11-10 [Embodiment] FIG. 2 is a cross-sectional view showing a voice coil motor in accordance with a preferred embodiment of the present invention. Referring to FIG. 2, the voice coil motor 200 includes a first permanent magnet 202, a second permanent magnet 204, a drive coil 210, and a housing 220. The first permanent magnet 202 and the second permanent magnet 204 respectively have a magnetic field emitting end N, and the magnetic field emitting end N of the first permanent magnet 202 and the magnetic field emitting end N of the second permanent magnet 204 are oriented in the same direction. The driving coil 21 is disposed adjacent to the adjacent side of the magnetic field emitting end N of the first permanent magnet 202 and the second permanent magnet 204, that is, disposed between the first permanent magnet 2〇2 and the second permanent magnet 204. Receive a current. In addition, the outer casing 220 is wrapped around the permanent magnet 202, the second permanent magnet 204, and the drive coil 210, and the first permanent magnet 202 and the second permanent magnet 204 are fixed to the outer casing 220. Here, the outer casing 220 is, for example, a yoke for forming a loop of the magnetic field generated by the first permanent magnet 202 and the second permanent magnet 204, thereby making the magnetic flux density of the region through which the drive coil 21 passes. Chemical. With continued reference to Figure 2, when the drive coil 210 receives current flowing into the paper in the direction of flow, it will be moved upward by the upward Laurentian force. Conversely, when the drive coil 210 receives the flow direction indicating the current of the paper surface, it will be moved downward by the downward Lorentz force. In other words, when the drive coil 210 receives the current, the drive coil 21 移动 moves between the first permanent magnet =0 and the second permanent magnet 2G4, and it moves in a direction away from or near the first permanent magnet 202. FIG. 3 is a diagram showing the magnetic force caused by the voice coil motor of FIG. 2 when the magnetic field flows. 130351 ^fl.doc/006 130351 ^fl.doc/006 95-11-10 __________—·One_Year Month Day Correction Replacement &amp;; version il丄α force line gradient map. As can be seen from Fig. 3, the direction of flow of the current in the drive coil 210 is orthogonal to the magnetic lines of force, regardless of whether the drive coil 21 is moved to any position between the permanent magnet 202 and the second permanent magnet 204. Therefore, the voice coil motor of the present invention can produce a more conventional driving force. Moreover, since the drive coil 210 is placed between the first permanent magnet 2〇2 and the second permanent magnet 204, the width of the voice coil motor can be greatly reduced as compared with the conventional one. It is to be noted that although the above embodiment is based on a pair of permanent magnets, it is not intended to limit the number of permanent magnets in the voice coil motor of the present invention. In another embodiment, a single permanent magnet can be used to generate a magnetic field as long as the binding force of the drive coil can be balanced with the driving force of Lorentz. Of course, as shown in Fig. 4, in other embodiments, the voice coil motor of the present invention may further include two or more permanent magnets 410, and a drive coil 420 is disposed between adjacent permanent magnets 41A. The application of the voice coil motor of the present invention will be described below by way of examples, but it should be understood by those skilled in the art that the application of the voice coil motor of the present invention is not limited thereto. Figure 5 is a cross-sectional view showing the structure of the actuator in the preferred embodiment of the present invention. Referring to Figure 5, the actuator 500 is primarily driven by the voice coil motor 200 of Figure 2, and the actuator 5 includes a carrier 510 in addition to the components illustrated in Figure 2. Here, the drive coil 210 is fixed to the outside of the carrier 510. Therefore, when the drive coil 21 is moved by the Lorentz force, the carrier 510 also moves. 11 I3〇35H •doc/006 95-11-10 As mentioned in Figure 5, the carrier 5丨〇 is carried, for example, by the suspension of iron 2〇4 (4) between the first permanent magnet 202 and the second permanent magnet. In the eighth, one end of the suspension mechanism 54 is fixed to the outer casing 220, and the other end is connected to the carrier 510. Here, the suspension mechanism 54 is, for example, made of a thin metal plate, a plastic thin plate or four mutually parallel copper wires, and the present invention does not limit the type of the suspension mechanism 540.

510. The actuator 600 embeds a magnetic conductive element 61 in the carrier 510 to suspend the carrier 510 between the permanent magnet 2〇2 and the permanent magnet 204 by the magnetic conductive element 610. Among them, the magnetic conductive member 61 is preferably spherical and is, for example, a steel ball. Of course, in another embodiment, the magnetically permeable element 61 can also be a circular thin plate. Further, in another embodiment, the actuator of the present invention may also be of a rotary type. Figure 6 is a cross-sectional view showing the structure of an actuator in another embodiment of the present invention. Figure 7 is the magnetic force diagram of the actuator of Figure 6. Referring to Figure 6, the difference between the actuator 600 and the actuator 5 of Figure 5 is that the actuator 600 does not need to use any suspension mechanism to support the carrier.

In particular, the actuator 600 further defines a magnetically permeable material layer 620 between the outer casing 220 and the carrier 510, and the surface of the magnetic permeable material layer 620 has a plurality of convex patterns 622 opposite the surface of the carrier 510 to enable proximity. The magnetic flux density at these raised patterns 622 varies, as shown in FIG. When the current is passed into the driving coil 210, the Lorentz force received by the driving coil 210 can resist the pulling force of the magnetic conductive material layer 620 on the magnetic conductive element 610, thereby driving the carrier 510 between the permanent magnet 202 and the permanent magnet 204. mobile. On the contrary, when the current flowing into the driving coil 210 disappears, since the magnetic conductive element 610 is limited to 12 130351 • doc / 006 95-11 - l 〇 - «- - _ is only available in the permanent magnet 202 and the permanent magnet Between 204, the magnetic component 61G will find the maximum point of the magnetic filament in the (four) ship, and stop here. As can be seen from the ® 7, the magnetically permeable element 61() will be at the position of the closest tangential point of the magnetically permeable layer 620, and the tangential position is located on the raised pattern 622. The application of the actuator of the present invention will be described below with reference to the embodiments. As such, these embodiments are not intended to limit the actuators of the present invention. 7 is a cross-sectional view showing the structure of an autofocus zoom device in accordance with a preferred embodiment of the present invention. It is worth noting that in high-resolution image capture devices, the optical system often uses the combination of multiple lenses to obtain the most accurate optical image. Therefore, in such an image capturing apparatus, zooming or focusing must be completed by a plurality of actuations. Referring to Fig. 8, the autofocus zoom apparatus 800 includes a plurality of permanent magnets 2, 2, a plurality of carriers 81, a plurality of lenses 820, a plurality of drive coils 21A, and a casing 22A. Each of the carriers 810 has an accommodating space 812 therein, and the lenses 82 are respectively inserted into the corresponding accommodating spaces 812. Similarly, the driving coils 210 are respectively fixed to the outside of a carrier 81, respectively, and the carriers 81() are respectively located between the adjacent permanent magnets 202, so that when the driving coil 21 is moved by the Lorentz force The carrier 810 and the lens 82 therein are also moved to focus or zoom. In addition, the autofocus zoom device 800 further includes an image capture component 830 for receiving light passing through all of the lenses 82(). In one embodiment, the cardiac image capturing component 830 is, for example, a charge couple device (CCD) or a complementary gold oxide semiconductor (c〇mpiementary Metal 13 i3〇3m 95-11-10)

Oxide Semiconductor, CMOS) image sensor.

Mir., ^ This artist should know that the autofocus zoom device can be a fine suspension actuator (as shown in Figure 8) or the rotary type of Figure 6 (as shown in Figure 9). It is limited. Please ^ Figure 9, it is worth mentioning that if the auto focus zoom device is to make ^ the actuating n of Figure 6, because it can be automatically completed under the current feeding condition, 'Shi Li', so when the automatic coke focus device _ The focus point or zoom point can cut off the current supplied to the drive coil 21 to reduce power consumption. In summary, the present invention has the following features: 1. In the voice coil motor of the present invention, since the driving coil is disposed at the magnetic field transmitting end of the permanent magnet, (4), when the crane coil is subjected to electromagnetic force to generate motion, The direction of current flow into the drive coil can still be orthogonal to the magnetic field lines, thereby increasing the overall driving force of the voice coil motor. 2. In the actuator of the present invention, since the arrangement position of the drive coil is not limited to between the permanent magnet and the carrier, the width of the actuating cry can be greatly reduced. ^3. The actuator of the present invention can easily add and combine two or more sets of independently movable optical objectives to constitute an autofocus zoom device. 4. Since the actuator of the present invention can still complete the automatic lock position in the case of power failure, when the actuator is applied to the auto focus zoom device, the auto focus zoom device can be cut off after zooming or focusing is completed. The current flowing into the coil is passed to save energy. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the scope of the present invention, and the skilled artisan, without departing from the spirit of the invention, 14 13033⁄4^.doc/006 95-11-10, When a few changes and refinements are made, the scope of this application is subject to the definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing a conventional microactuator. Figure 2 is a schematic illustration of a voice coil motor in accordance with a preferred embodiment of the present invention.

Nissan is replacing the 'Mingzhi' system. Figure 3 depicts the force line gradient diagram caused by the voice coil motor of Figure 2 when the magnetic field flows. Figure 4 is a schematic cross-sectional view of a voice coil motor in accordance with another preferred embodiment of the present invention. σ Figure 5 is a cross-sectional view showing the structure of the actuator in the preferred embodiment of the present invention. &quot; Figure 6 is a cross-sectional view showing the structure of an actuator in another embodiment of the present invention. Figure 7 is a magnetic line diagram of the actuator of Figure 6.

Figure 8 is a cross-sectional view showing the structure of the present invention. Autofocus zoom mount in the preferred embodiment

Figure 9 is a cross-sectional view showing the structure of an autofocus zoom unit in another preferred embodiment of the present invention. [Description of main component symbols] 51, 53, 202, 204, 410: permanent magnets 52, 220: housings 54, 210, 420: drive coils 56, 510, 810: carriers 15 13 〇 3 said 95-11-10 13 〇3 says 95-11-10 曰 曰 correction replacement page I maji —~—” 100, 500, 600: actuator 200 · voice coil motor 540: suspension mechanism 610: magnetically conductive element 620: magnetically permeable material Layer 622: raised pattern 800 · autofocus zoom device 812: housing space 820: lens 830: image capturing element

16

Claims (1)

-----1 I303U2 twfl.doc/006 95-11-10 Year of the month 曰 correction replacement page qi; 1L 1 Q.____J X. Patent application scope: 1. A voice coil motor, including: a first permanent magnet Having a magnetic field emitting end and a side adjacent to the magnetic field emission; a driving coil disposed adjacent to the side of the first permanent magnet and adapted to pass an electric current to the driving coil; The peripheral device 'covers the first permanent magnet and the driving coil, and the permanent magnet is fixed to the outer casing. 2. The voice coil motor of claim 1, wherein the outer casing is a yoke. The voice coil motor of claim 1, further comprising a first water permanent magnet, wherein the driving coil is located between the first permanent magnet and the second permanent magnet, and the second The permanent magnet is in the same direction as the magnetic field generated by the first permanent magnet. 4. A voice coil motor comprising: a plurality of permanent magnets each having a magnetic field emitting end, wherein the magnetic Φ field emitting ends are oriented in the same direction; a plurality of driving coils respectively disposed adjacent to the permanent magnets And adapted to pass an electric current to the driving coil; and an outer casing 'covers the permanent magnets and the driving coils, and the permanent magnets are fixed to the outer casing. 5. The voice coil motor of claim 4, wherein the outer casing is a roller iron. 6·—Actuator, including: 17 ((S ) 13〇3512 16886twfl.d〇c/006 95-11-10 Shooting end permanent! Iron 'with magnetic field emitting end and Hui Lian·,] Shooting phase One side of the adjacent side; the carrier is disposed adjacent to the first permanent magnet, or the direction of the permanent magnet; and the driving coil is disposed adjacent to the side of the first permanent magnet, tamping = The exterior of the carrier is adapted to pass through a current-current to the drive line and the outer casing encloses the first permanent magnet, the shaft coil and the carrier, and the first permanent magnet is fixed to the outer casing _7. The actuator according to claim 6 of the patent application, the magnetic component is embedded in the carrier. 8. The actuator component as described in claim 7 is Spherical or circular thin plate. 4 material magnetic, 9 · The actuating n as described in claim 7 of the patent application, further comprising a magnetic material layer 'disposed on the outer casing' and located between the outer casing and the carrier, And the magnetic conductive (four) layer has a plurality of convex patterns on the surface of the nano-coil, wherein when the driving coil does not receive the current The carrier is magnetically attached to the layer of magnetically permeable material by the magnetically permeable element. 四 (4) The actuation 11 of claim 6 further includes a county lifting mechanism, in the outer casing, And the carrier is adapted to support the actuator according to claim 6, further comprising a second permanent magnet, wherein the driving coil is located in the first permanent magnet disk The magnetic seal produced by the second permanent magnet between the second permanent magnet and the first permanent magnet and the first permanent magnet is 13035". 95-11-10. [υ々·物J is _2. The actuator of claim 6, wherein the outer casing 13 is an autofocus zooming device, and a plurality of permanent magnets respectively have a field emission end facing in the same direction I, a magnetic field transmitting end, and the a plurality of carriers, each of which is disposed in the carrier - the carrier is disposed between the adjacent material η /, has * work place ' and each of the long magnets - between the moving water and the long magnet, and It is suitable for accommodating a plurality of lenses in the permanent space to be respectively placed in the accommodating space of one of the carriers, == circle, respectively Between the adjacent permanent magnets, the current is applied to the driving coils; and the fishing rods cover the water-long magnets, the driving coils, and the 14. On the outer casing, it also includes a multi-fine, self-focusing zoom device as described in the previous article: more than a plurality of magnetic guiding elements are embedded in the carriers, respectively, 14$ The autofocus zooming device has a spherical or circular thin plate. The autofocus zoom housing described in item 14 is more advantageous and the::Γϊΐ: is disposed on the outer casing, And on the outer surface, the material layer is opposite to the driving coils, and has a plurality of convex patterns 'a when the driving coils do not receive 19 97-05-16 I3〇35J8L, 〇c/d It is magnetically attached by the magnetically conductive elements: the current month i Β _ the current is on the material layer. 17. The autofocus zoom device of claim 13, further comprising a suspension mechanism secured to the housing and coupled to the carriers to support the carriers. 18. The autofocus zoom device of claim 13, wherein the outer casing is a yoke. 20 • I3〇351„ 95-11-10 d-day correction replacement page i 95. Π. l〇! 1· 参参1 参J 1 1 J *»»»*&lt;». ·ΙΙΙ—Hill. I III the driving coil is generated from the electromagnetictorce, the direction of the current passing through the driving coil can orthogonally intersect to the magnetic field, so that the driving force of the whole voice coil motor can be increased. a) The representative representative of the case is: Figure (6). (2) The symbol of the representative figure is briefly described: 200 · Voice coil motor 202, 204: permanent magnet 210: drive coil 600: actuator 51 〇 = vehicle 610: magnetic conductive element 62: magnetic conductive material layer 622: raised pattern • ^ If there is a chemical formula, please reveal the chemical formula that best shows the characteristics of the invention: