TW200947010A - Driving device - Google Patents

Abstract

A driving device which does not cause a driven member to rotate without using a guide member. The driving device has an electromechanical converting element having first and second end surfaces opposed to each other in the direction of extension and retraction of the element, a vibration and friction section mounted to the second end surface of the electromechanical converting element, and a movable member frictionally joined to the vibration and friction section. The movable member can move in the direction of extension and retraction of the electromechanical converting element. The vibration and friction section has a first friction surface and a second friction surface which are opposed to each other in a direction perpendicular to the direction of extension and retraction of the electromechanical converting element. The movable member is constructed from a bar-like first movable body and a bar-like second movable body which respectively hold the vibration and friction section at the first and second friction surfaces thereof. At least the first friction surface or the second friction surface of the vibration and friction section is provided with a groove having a V-shaped cross-section.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device, and more particularly to a driving device for a motor-mechanical conversion element using a piezoelectric element or the like. [Prior Art]. Conventionally, as an actuator for autofocus of a camera or an actuator for zooming, a mechanical mechanical conversion element such as a piezoelectric element, an electrostrictive element, or a magnetostrictive element is used (drive device). Linear actuator. ❹

Patent Document 1 discloses a piezoelectric element including a drive shaft (a vibrating rod and a vibration friction portion) that is coupled to the piezoelectric element and that extends in a piezoelectric element-shaped expansion and contraction direction, and rubs against the drive shaft. The combined driven member (zoom barrel, moving member) is well-positioned. _Specially distribute the wipes, and take a drive signal applied to the piezoelectric element by f to drive the driven member (zoom lens barrel, movable member). Job record i towel, between the chicken * (missing part) central 2 moving parts (moving members) and the friction plate. In other words, the drive _ (vibration ΐ ΐ 贯通 贯通 贯通 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝 郝_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The guiding member for linearly moving the driving member (wei lens barrel) is used. Tianli Literature 2 discloses that there is a kind of high-wei _ practice, which is a case where the transfer device is a crystalline polymer to form a movable member and is formed of a metal material (4) 2 ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ Mechanically translated parts), a drive shaft (vibration miscellaneous) fixed at one end of the telescopic direction of the piezoelectric element, can be detached from the drive shaft, can be attached to the drive shaft, can be attached to the drive shaft, and can be fixed to the pressure. The telescopic direction of the electrical component and the other end of the weight (weight) (stationary component, heavy hammer) Different by extending the piezoelectric element and the contraction of the velocity or acceleration of the vibration to the drive shaft, so that the movable member) is moved along the drive shaft (a vibration friction portion). In the drive device disclosed in Patent Document 2, the drive shaft (vibration friction portion) is constituted by a round shaft that extends in a straight line shape. The movable member (moving member) is composed of a movable body, a body, and a _ (gap), and the green system is engaged with the driving shaft by a secret crane. In order to move the movable member along the drive shaft, the movable sub-body and the gap are pressed to the drive by the substantially-shaped leaf spring in such a manner that the drive shaft and the movable shaft are rubbed. A groove having a v-shaped cross section is provided in the movable body. Subtracted into the groove, the two slopes of the groove are in contact with the drive shaft. Similarly, the two if? has a groove with a V-shaped cross section. When the gap is combined with the movable sub-body, the two inclined faces of the groove are brought into contact with the drive shaft by the grooves embedded in the gap. As the material of the material, a carbon fiber reinforced resin in which carbon fibers are bundled and adhered is used. Further, a fine mixture of Wei_ and fluorine is applied to the drive shaft of the friction portion or the ΐ mutual contact surface of H. The patent document 2 does not disclose or suggest any means for preventing the movable member from moving around the driving vehicle (vibration friction portion). In other words, the patent guidance structure discloses that any benefit relating to the linear movement of the movable member (moving member) reveals that the moving member can be driven by the motor device in an idle and stable manner. Having a wealth: a stationary member; a moving plant 'fixing one end of its telescopic direction to the stationary member; driving the vibration friction portion)' and the other 0 of the motor surface conversion element in the telescopic direction, can be moved to the motor machinery The way of transforming the direction of the expansion and contraction of the component is changed to Han, 'combined with the crane component county, and supported in a way that can be moved in the direction of the motor mechanical mechanism; and the county power supply device is used to drive the installation. A frictional force is generated between the frictional portion and the moving member. The frictional force is fixed to the moving member and generates a pressing force (four) member, and a clamping member that transmits the pressing force generated to the driving member, and the contact portion of the driving member and the clamping member The contact part is set to a sectional part == nano-shifted two or two large f-cylindrical shape, and the hole system in the stationary structure is used as a frame to keep the mirror secret. __Guide structure ^ Li Wen special contribution 4 text: two conversion The component is fixed to the motor unit, and the carbon element (carbon^i is used as the vibration member (vibration friction portion), and what is relevant to the use of the suggestion == Patent Document 4 is not ^^^ ❹ The m is placed in a miscellaneous state. The magnetic material of the patent document 5 is known as the fixed body (heavy hammer, static broadcast, dynamic friction member (the moving member at the other end of the vibration). For the moving of polyphenylene sulfide tree wax (pdyphenylene, ceramic material, CLCP resin), etc., /_) (PPS resin), liquid crystal polyester, etc. /, 妷 reinforced resin and broken glass Fiber-reinforced tree part) wheel age (vibration friction has _ shift two ((shifting motion two ^^^ And 'patent wire 5 simple domain friction surface. Animals followed by ─ ― ― 200947010 fJ guide in the up and down direction of the first! Hanging axis and the second hanging shaft. The H moving body (moving member) linearly moving guiding member ^The role of the master can achieve super b, even if the (10) input power is transferred and the analysis fineness is good, and can be applied to the loss, move and send. Patent Document 6 discloses _ transfer device = line ❹ state of electricity The elastic force of the rear end and the free end electric vibrator of the piezoelectric body to be pressed to the extending portion side; the transfer of the 'μ bow to the optical axis direction of the lens barrel. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. [Patent Document 6] JP-A-2007-226234 SUMMARY OF INVENTION [Problems to be Solved by the Invention] In the drive devices disclosed in the above Patent Documents i to 6, Either under the rotating sail The member to be driven moves in the direction of the wire, so the (special (four)) guiding member. Therefore, there is a problem that the structural tomb η' soil invention is provided in the case where a special (dedicated) guiding member is not required. The driving device for the smuggling of the smuggling of the sneak peek is to provide a driving device having a simple structure. 6 200947010 Other objects of the present invention should be apparent as the description progresses. According to the present invention, a driving device is provided which is provided with a motor mechanical conversion element (13) having a pair of end faces (13a, 13b) facing each other in the expansion and contraction direction, and a side of the end face of one of the mechanical conversion elements of the motor. (13b) a vibration friction portion, (14, 14A), and a moving member (121, 122) frictionally coupled to the vibration friction portion, and the moving member is movable to a driving device 2 2 of a telescopic direction of the motor mechanical conversion member ( 10, 1A, 10B) 'characterized by: the vibration friction portion (14, 14A) has an ith friction surface (141) facing each other in a direction perpendicular to the direction of the retraction, and a ^ The surface (142) and the moving member are rod-shaped members that sandwich the vibration friction portion on the first friction surface and the first surface. The moving body 21) and the second moving body (122) are in a state in which the vibration friction portions (14, 14A) have a groove having a v-shaped cross section on the side of the i-th friction surface and the second friction surface (141a, 142a). In the month t drive device, the first friction coefficient between the first moving body (i2i) and the vibrating county 2° swimming f*(1)7), the first friction surface (141), and the first f friction surface (10) G The groove-shaped groove friction portion (10) has a first (142>2-shaped V-shaped groove (10) formed on the first friction surface (141) as the squeezing surface V, and a degree to less than 180 degrees. The range is good. The second friction surface which is formed on the first friction surface ((4)) at each of the v-shapes: the upper frictional dynamic friction portion (1) A): V = 冓 (,), and the vibration (141a) ( 1° '10A'10B); _ is formed integrally with the first moving body ((2)) or with the i-th moving 7 200947010 moving body (121); and the friction applying device (15) for the vibration friction portion ( 14, 14A) between the first friction surface (141) and the first movable body (121), and between the second friction surface (142) of the vibration friction portion (14, 14A) and the second movable body (122) Produces friction. The friction applying device is composed of a first end portion (15a) attached to the driven member (17) and a pressing member to which the second moving body (122) is attached to the second end portion (15b). At this time, the pressing member (15) is configured to generate a pressing force that causes the vibration friction portion (14, 14A) to be the first by the first moving body (121) and the second moving body (122). The friction surface (141) and the second friction surface (142) are clamped while being pressed. The pressing member is engaged by, for example, the second end portion (15a)

The drive member (17) is configured by a spring (15) to which the second movable body is attached to the second end portion (15b). Further, the reference symbols in the parentheses are added to facilitate understanding. However, the example is not limited to the above-mentioned symbols. [Effect of the invention] The upper frictional portion has a frictional portion "i plane" in a direction perpendicular to the direction of expansion and contraction, and the moving member is moved by vibration second. The frictional surface is respectively sandwiched between the rod-shaped first moving body and at least the member of the wiping and 帛1 帛 帛 帛 杂 杂 杂 杂 杂 , 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 。 驱动 驱动The driving device of the first embodiment is a side view of the driving device 10 shown in Fig. 2 in the main part of Fig. 4. Fig. 4 will be 'in magnified. Fig. 3 is the driving device 200947010 direction), and the z-axis is Up and down direction (height direction). The driving device 10 of the drawing is used as a lens driving unit of, for example, an autofocus lens (aus lens) drive unit. In this case, in the example shown in Figs. i to 4, the 'up and down direction z is the optical axis 镜头 direction of the lens. Further, the autofocus lens drive unit is constituted by a lens movable portion and a lens drive portion. The lens drive unit drives the lens movable portion as will be described later while supporting the lens movable portion so as to be slidable in the optical axis direction.驱动 The driving device 10 shown in the figure is disposed in a casing (not shown). The casing includes a cup-shaped upper side cover (clear (not shown) and a lower base (not shown). The lower base of the body is covered with a cake member (heavy weight) u. The upper surface of the upper cover, The optical axis of the lens is a cylindrical portion (not shown) as a central axis, and the other surface is shown in the central portion of the lower base, and an imaging element disposed on the substrate is mounted. The image is imaged by a movable lens (described later). The image of the CCD (charge C0UPled device) component (the lens holder (1 coffee with lens l, ff holder, lens holder) 17 has the same lens lens (lens barrel) (Lens group (1 café _ mirror ^ group) 18 side bribes automatically on the head muscle. Formed with a viewable wall that can be screwed to the above-mentioned mother, the turning barrd) 18 is mounted on the lens holder 17 U ff = ^ 〇 which axis is screwed in the direction, and the mirror is compensated 18 to receive 4^; ^ = the adhesive and the like are joined to each other. The inside of the holding device 17 is provided with the lens holder 17 with respect to the light The right side of the axis 〇 γ protrudes outward in the radial direction, and the left and right direction of the ridge 70 extends parallel to the axis In the vertical direction, the rear wall of the strip portion 172 and the light LH dog strip portion 172 is fixed with a 200947010 _axis) 121. In the illustrated example, the first moving body 121 side is extended: The left end of the shape 170 is γ in the left-right direction γ1, and the extension 174 is provided with the first i5a 174a for holding the spring 15. The spring 15 is along the extension 174 from the first i 2 The right side extends to the second end portion 15b. The second moving body (moving axis) 122 having a rod shape is shown in the spring 15 as shown in the spring 15. In the figure circle, the column shape, the moving body 122 Similarly, the first moving body 121 is formed to be the same as the first moving body 121, and the second moving body (moving axis) 122 is pushed by the direction of the elastic crest 15 _ close to the first 121 (front of the front-rear direction X);

The member 14 is formed such that the first and second friction surfaces (4) H 3 ί ° the second/second friction surfaces 141 and 142 are perpendicular to the optical axis 0 direction. In other words, the length of the length of the i-th moving body 121 in the τ of the first and second frictional surfaces 14 and 1421 盥 m is substantially the same as the τ in the direction of the intersection. Further, the first moving body 121 and the second moving structure are formed. The materials of the first moving body 121 and the second moving body 而 act. ^ 2 The combination of the lion body (2) is used as the moving member η, ι by the holder 17, the mirror (lens group), and the spring moving unit. In the field, Wei, even if it is not set up, will move the member n frame linearly in the direction of the optical axis. Therefore, the guiding member such as the driving device disclosed in the above 6 is not required. The lens drive unit (the drive unit) H of the autofocus lens drive unit is: as the motor mechanical conversion ^ _ electrical component 13, the stationary member (heavy hammer) u, the above vibration It is composed of: 200947010 and the vibration transmission component ip. The combination with the stationary member U is a combination of a fine layer of a member of the laminate (four) tree 13 (four) and a member of the second member (Wei 11). The electric component I3 is placed to adhere the crucible 14 to the upper end surface 19b of the member 19. U 者 树 曰 曰 曰 结合 结合 结合 结合 结合 结合 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动 振动The vibration friction portion (vibration member) 14 may have a structure in which only the slidability is considered. Therefore, the material of the vibrating friction portion (the vibrating friction portion and the mechanical mechanical conversion element (the laminated piezoelectric element) 13 is selected as the material. Accordingly, the degree of freedom of the vibration friction portion (vibrating member) 14 is widened, and the shape thereof is increased. The degree of freedom is also widened. The material of the dynamic friction portion (vibration member) 14 is shown as the surface total mineral deposit 18. The other side surface is used as the material of the vibration transmission member 19," using iron & gold (cold) Rolled steel plate (spcc), unrecorded steel (sus), etc.) By adding the vibration transmitting member 19', by blending the material and shape with other members, it is possible to suppress the resonance phenomenon of the 箦15. The vibration of the shape is relatively simple, and the transmission member 19' compensates for the unevenness of the functions of the respective products caused by the unevenness of the size of the rotary spring 15. In other words, since the vibration transmission member 19 can be formed in a simple shape, the driving device 10 can be reduced. The function of each product is uneven. The relationship between the vibration friction portion 14 and the first and second movable bodies 121 and 122 will be described in detail with reference to Fig. 5 and Fig. 6. Fig. 5 is a plan view of the drive device 1A. Figure 11 2009 47010 6 Figure shed 5 _ riding _ surface part plus Kasumi ton partial enlarged section rod-shaped first and second moving shaft 121, 122 times disk life red #^ f 丄 14 friction combination. In the vibration friction part ( Vibration "Mo (= 2! Wipe joint (the !! friction surface) (4), formed with the ith section: ^ =: the second = rear direction X after the end 'in the turbulent friction part η = ❹ body (===;: 1 and 2nd movement ί :;r; 15 ^ By the second movement of the second end portion 15b of the women's clothing, and the vibration friction portion (vibration member) 14 = ϋΐ) 122, the IXV^TJ is generated. ^15 2 "Moving parts ί, 121, 122 Friction force applying means (The frictional force is applied between the pressing devices) The vibration friction portion (vibrating member) 14 is attached to the both end faces (the groove-shaped groove of the shape surface) The i4ia is formed on the second frictional first mm emitter, and the red can suppress the movable portion around the ϊ槿^, that is, even if some special (dedicated) device is not used: 显(四)卿细纲系The first moving body 121 and the second moving body 122 14 are formed by a flute. Therefore, the first friction coefficient and the second movement between the first movable body 121 and the vibration friction portion can be made to vibrate the surface. Body 122 and T' The second friction coefficient between the second friction surfaces 142 of the 〇P is substantially 12, 200947010, etc. As a result, as shown in Fig. 6, the second movable body 121 between the first friction surfaces 141 and the vibration friction The first frictional force used by the part and the two black circles on the left side are the contact lines between the rubbing faces M2 (the second frictional force f_L of the moving body 122 and the vibration frictional portion 相等 is equal. Therefore, the second result on the side of the two black dots on the right side can be driven by the electric motor. The vibration of the vibration is generated in the vibration friction portion 14 by the expansion of the good element 13 . ; ff second moving bodies 121, 122. Between the first frictional joint U and the first moving body 121

141a 1 1 1 The two linear contact grooves 141a of the TV moving body 121 and the first re-udbility excellent driving force' have the effect of improving the mobility as the first moving body m. . In addition, the straight line of the ph ph ph ph ph ph ph ph ph 刚 以 以 以 以 以 以 以 3 3 3 3 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于In the second section of the shape of the brain, the V-shaped groove 142a of the second section of the brain is in contact with the second line of the second divergence of the vibrating part 14 (four) and the second movable body 122. (2) The frictional contact portion (the second rubbing surface 142) has a stable contact state, and can provide frictional driving with excellent reproducibility, and has the effect of improving the linear forward mobility of the ifj as the axis shift of the second moving body 122. Further, the angle % of the V-shaped groove 142a of the second brake surface is preferably in the range of 3 Torr to less than 180 degrees. Further, the first and second movable bodies 12 122 are pressed by the spring 15 to the vibration friction portion 14. In this manner, the first and second movable bodies 121 and 122 are respectively pressed to the first cross-sectional V-shaped groove 141a of the vibrating friction portion 14 and the second cross-sectional V-shaped groove 142a, thereby forming three parts. The stable four-wire contact of the first and second movable bodies 121 and 122 and the vibration friction portion 14 is obtained. Referring to Fig. 7, the effective length Ls of the spring 15 will be described. Fig. 7 is a perspective view of the drive unit 10 shown in Fig. 1. As shown in Fig. 7, the driving device 1 can design the length LS of the spring 13 200947010 to be long. Therefore, even if the size or assembly of the spring 15 is ΐίίί', the influence on the load can be reduced. As a result, the driving device 10 can be manufactured by reducing the unevenness of the force month b of each product. Since η if Ϊ ’ can design the effective length Ls of the spring 15 to be long, the material ′ of the elastic η can exhibit not only a metal elastic resin but also a sufficient elastic effect. The elastic cyanine 15 is attached to the lens movable portion side instead of the vibration friction portion 14. In this way, by separating the vibration friction portion 14 from the spring 15, the occurrence of the vibration of the spring 15 can be prevented. Therefore, the vibration friction portion 14 and the spring 15 do not cause phase reversal. The head movable portion moves with good efficiency. Further, the lamp moving direction of the lens movable portion can be controlled to advance in a desired direction. The lens driving unit and the mirror emitting unit are juxtaposed with respect to the optical axis 0 as shown in FIG. Therefore, the drive device 10 can be made lower in height. In the illustrated embodiment, the length of the long button of the i-th moving body 121 is made longer. The reason is second. The first moving body 121 is formed to have a long length in order to achieve "stable frictional engagement of the vibration friction portion 14". The other side surface is used as a secondary function for realizing stable driving of the driving device 1 by the second moving body (2). Therefore, the length is formed to be short. Accordingly, the driving and the lowering of the height can be achieved. 〜土ο Follow the explanation of the displacement supplied to the laminated piezoelectric element 13 (5) the current layer piezoelectric element 13 with reference to Fig. 8 Further, Fig. 8 is the same as the fli of the above-mentioned patent document, and Fig. 8 (Α) * (Β) shows the change and current of the current supplied to the laminated piezoelectric element 13 by the drive circuit (not shown), respectively. The displacement of the electrical component 13. As shown in Fig. 8(A), the laminated piezoelectric element 13 alternately flows with a specific fixed current (negative direction). Under such a condition, as shown in Fig. 8 (8), the laminated piezoelectric layer The element 13 interactively generates a strip displacement (extension) corresponding to a large current (forward), and a stable displacement corresponding to a fixed current (negative direction) (shrinking ^, that is, applying a rectangular wave current to the laminated piezoelectric element 13 ( Figure 8 (A)) to produce a mineral tooth to the laminated piezoelectric element 13 Displacement (expansion and contraction) (Fig. 8 (8)). In addition to Fig. 8, the operation of the driving device 1G will be described with reference to Fig. 1. First, for 200947010, the lens can be moved downward in the up and down direction __ first, such as Fig. 8 (Α) 联 'If the current _ < current, as shown in Fig. 8 (Β), the laminated green element 13 = the direction of the extension displacement. As a result, the vibration friction portion 14 will be below ^ ' degrees = ζ) Moves up sharply. At this time, because the movable part of the lens (moving, m, i22) is better than the vibration by the inertia force ===1, the broken_wheel, the substantial increase in its result The vibration friction portion 14 is moved along the lens ===. Slowly downwardly. At this time, since the _ friction portion 6 (lower to the moving body 12 122) is generated by 1 The friction surfaces (the first and second friction bodies 121 and 122) of the first and second transfer surfaces (4) and 142) move downward with the vibration friction portion 14 in the downward movement direction Z). The seven-axis first axis direction (above, as described above, by laminating the piezoelectric element 侔 and the negative specific _ constant current) to laminate the product 7 3 = current φ to make the lens movable portion along the optical axis 0 side ( ^f U interacts negatively in the negative direction of the formation of the Changsu 13 series.) As a piezoelectric material, the use of Ρζτ = χ · 9 [% layer, and the production of laminated layers of electricity and components; The internal electrodes are alternately laminated in a comb shape a6 [mm],

The electric cymbal 13 has a paste on the side of the electric arc, and hides the (circular dead zone (no induction) portion (clearance) of π ΐ [layer I 200947010]. As shown in Figs. 1 to 7 In the drive device 10, the first movable body 121 and the movable lens barrel (lens holder, lens holder) 17 are respectively configured and fixed to each other, but they may be similar to the driving device i〇A shown in FIGS. 9 and 10 . The first movable body 121 is configured integrally with the movable lens barrel (lens holder, lens holder) 17. In this case, the movable lens barrel (lens holder, lens holder) 17 and the first moving body 121 are integrally formed. The drive device 10B according to the second embodiment of the present invention will be described with reference to Fig. 11. The drive device 10B is the same as the portion where the vibration friction portion is changed as described above, and the rest is shown in the figure. The driving device 1A shown in Fig. 7 has the same configuration. Therefore, the reference numeral of the vibration friction portion is attached to 14A. Fig. η shows the vibration friction portion 14A and the first and second moving bodies similarly to Fig. 6 . A top-down cross-sectional view of the configuration relationship of 121 and 122. The dynamic friction portion 14 is different in that the vibration friction portion μα and the second friction surface 141 are formed with a groove 141a having a V-shaped cross section. Therefore, the second friction surface 142 of the vibration friction portion 14A is formed into a planar structure. In the driving device 10 having the vibrating county portion 14 shown in FIG.

ί 2nd shift _121, 122) is formed in S with the vibration friction portion 14, and the moving device has the vibration friction portion 14A, the driving device 1 〇Β the second moving body 121, 122) and the vibration miscellaneous portion Μ 15 « The first and second moving bodies m, 122 points = 14A. According to this, the V-shaped groove and the 2nd knives ^= to the i-th and the _th body m, 122, 1 of the vibration friction portion 成 are formed on the ith friction surface (4). Attached to the two ends (the shape is called (four) 丨 and the first movement 1 body = f2f = f 仙 and the second friction face _ ' and _ _ movable part around 16 200947010 ie even if some special (special) In the same manner as in the present embodiment, the second friction coefficient between the first friction surface 141 of the second movable rubbing portion 14A and the vibration friction 122 and the second vibration friction portion 14A can be similarly obtained. The moving surfaces of the friction surfaces 142 are equal in physical mass. In other words, the material of the i-th and second moving bodies 12 122 is selected (selected) by the number of the i-th and second friction coefficients, and 11 The contact line between the moving body 121 and the vibration friction portion 14A j ❹ 2, (the two points on the left side of FIG. 11) acts 2 rubbing force, and the second moving body 122 and the vibration friction portion 14A ^ 1 Moto wide and a black dot) The effect of the actual 2 trade is equal. Accordingly, the movable portion of the lens can be stably driven. *The drive is installed without the tool, and the groove 142a formed in the cross section of the vibration friction portion is in linear contact with the second movable body 12A 14A 2 142 2 ^ to make the friction joint ( 1st, the state of the touch is stable', and the reproducibility is excellent. 7 ^High height as a moving member "筮丨" ο必^ f abusive drive and has a

The effect of the line moving forward. The moving body 12 122 is a shape of the cylindrical moving body 121 and 122, and the moving body 121 and 122 are formed in the shape of the cylindrical moving body 121 and 122. Not limited to this. [Simple description of the diagram] The watch is not the invention! Fig. 3 is a perspective view showing the main part of the driving device shown in Fig. 1 and Fig. 3 is a side view of the driving device shown in Fig. 1. The main part of the driving device shown in Fig. 3. Figure 5 is a plan view of the driving device shown in Figure 1; = is a partial enlarged view of the portion of the elliptical circle of Figure 5, and the 7 is used for the effective spring of the magazine. Figure 丨 驱动 ϊ I iI (8) system (10) waveforms of the current to the electrical components of the electrical components and the displacement of the piezoelectric element; Wang Yu layer 9 shows the drive shown in Figure 1. FIG. 10 is a perspective view showing a main portion of the driving device shown in FIG. 9 in an enlarged manner; and FIG. 11 is a schematic view showing the vibration of the driving device used in the second embodiment of the present invention. A top cross-sectional view of the arrangement relationship between 1 and the second moving body.擦部部 [Main component symbol description] 10 11 13 13a 13b Η, 14A 14a 15 15a 15b 17 18 10A, 10B drive unit stationary member laminated piezoelectric element (motor mechanical conversion element) first end face (lower end face) second end face (upper end face) Vibration friction part lower end spring (friction applying device, pressing device) The first end of the second end movable lens barrel (lens holder, lens holder, body-moving lens barrel (lens group)) 18

。 。 。 。 。 。 。 。 。 。 Moving body second moving body tubular portion protruding portion extending portion locking groove lens optical axis autofocus lens

19

Claims (1)

200947010 VII. Applying for the patent garden: L 'system with the direction of the cake gamma has the opposite direction - the end face: the vibration friction part, and the combination with the vibration friction part = the direction of the box moves to the thief The expansion and contraction of the young pieces are in the direction in which the middle and the downward direction intersect perpendicularly. The member is moved by the rod-shaped second side that sandwiches the vibration friction portion between the first friction surface and the second friction surface. Zhao and the second shifting friction surface and the second friction surface to 2. wherein the said first and the second moving coefficient of friction and the second coefficient of friction are substantially equal to each other. 3. The driving device described in item 2 of the patent application, ❹ 4· - ^ ^ The length of the body is longer than the long sound of the second moving body. The first vibration vibrating portion is as described above; wherein, the friction device is mounted on the second miscellaneous surface, which is a driving device according to the seventh aspect of the invention. 9 angle is in the range of % to less than 18G lang. Word 9_ = 凊 Patent Scope Item ^ is integrally formed with the first moving body: the first body of the moving body or the vibration friction portion 'for the second friction device of the movable friction portion and the second production device, wherein the frictional force is applied to the right member, and the +, 3 Λ is attached to the driven member And the second pressing force is formed by the pushing member 3: the pressing member of the moving body, the pressing member is: 乂, _ and _ and 2 = holding, - side = the first friction surface and The driving device of the second friction surface-side clamp 11 1G, wherein 'the pressing structure is mounted with a component' and the twenty one