Optical driving device

Abstract

The invention discloses an optical driving device with a straight movement mechanism. In the straight movement mechanism composed of a fixed part and a movable part guided by two or more straight movement guide parts, a driving part for driving the movable part is arranged between the two or more straight movement guide parts. And the driving part and the fixed part or the movable part or the related part are mutually pressed and connected through a spring. A microsphere layer formed by coating a solvent mixed with microspheres is provided on the microsphere rolling surface of the straight guide part, and at least one of the plurality of straight guide parts has a V-shaped cross-sectional shape, a circular cross-sectional shape, or the like.

Description

Technical Field

[0001] The invention relates to an optical driving device. Background Art

[0002] Among the related structures of the optical driver carried by the camera assembly carried by the existing mobile phone and other portable terminals, there are the following published or applied patent documents:

[0003] Reference 1: Japanese Patent Application Laid-Open No. 2009-47798

[0004] Reference 2: Japanese Patent Application Laid-Open No. 2011-233790

[0005] Reference 3: International Publication No. WO2011 / 055504

[0006] Patent document 1 proposes a driving device driven by a stepping motor, which uses a guide post as a guide and applies force with a spiral spring to make the moving part press-fit with the driving screw. However, the structure is large, and the sliding friction resistance of the guide post is large, which is not conducive to smooth driving.

[0007] Reference 2 proposes an ultrasonic piezoelectric ceramic drive device, which also uses a guide post-guided drive device. The guide post-guided sliding friction resistance is large, which is not conducive to driving. In addition, the XYZ direction positioning of the ultrasonic piezoelectric ceramic is unclear, and the piezoelectric ceramic is easily offset during installation, resulting in large positioning errors.

[0008] Reference 3 proposes a driving device with a piezoelectric SIDM structure. Since the carbon fiber rod is doubly clamped by two opposing V-shaped supports on the elastic component and the driven component, the friction resistance is relatively large and the driving efficiency needs to be improved.

[0009] In addition, the motor matching process usually has a pure water cleaning process. In the guide pillar-guided drive structure, grease or lubricant is usually added to the guide part to reduce the sliding resistance. However, pure water cleaning can easily cause the grease or lubricant to be lost, so the product cleanliness, lubrication and reliability are in a dilemma.

[0010] In addition, although lubricating grease has a certain lubricating effect, since grease is often a paste-like gel and the material itself is sticky, it forms viscous resistance, which is not conducive to product driving.

[0011] Furthermore, the ball motor in the prior art is relatively large in size, which is not conducive to miniaturization. Summary of the invention

[0012] In response to the problems existing in the background technology, the present invention provides an optical driving device, comprising a fixed component and a movable component, wherein the movable component moves under the guidance of two or more straight-moving guide parts formed on the fixed component and the movable component, and comprises a driving component arranged between the straight-moving guide parts or in parallel with the straight-moving guide parts, and a microsphere layer consisting of gaps respectively located on the fixed component and the movable component and formed facing each other, and a plurality of microspheres in the gaps, including a spring component that applies an interaction force to the driving component, the fixed component and the movable component, and the microsphere rolling surfaces forming the gaps are pressed against each other by the springs.

[0013] The aforementioned spring is a flat spring.

[0014] The aforementioned driving component adopts a piezoelectric driving method.

[0015] The aforementioned driving components adopt electromagnetic driving mode.

[0016] The aforementioned driving component adopts a shape memory alloy driving mode.

[0017] The aforementioned driving components are driven by stepping motors.

[0018] The shape of the gap formed in at least one straight-advance guide portion is a V-shaped cross-sectional gap shape, including a V-shaped groove and a V-shaped protrusion, which are respectively arranged on either the fixed component or the movable component.

[0019] The gap shape formed by at least one of the straight guide parts is a cross-sectional gap shape of a circle or an arc, or a semicircle or a semiarc or a partial circle or a partial arc (hereinafter collectively referred to as a circle), including a circular groove and a circular protrusion, and the circular groove and the circular protrusion are respectively arranged on either the fixed part or the movable part.

[0020] The driving member is a piezoelectric electromechanical conversion element, and the friction member and the driven member are brought into pressure contact with each other by a pressing force, thereby driving the driven member by a friction force.

[0021] A microsphere layer is provided on the opposite side of the friction contact surface of the friction component.

[0022] The microspheres are mixed in a solvent in a predetermined amount to form a solvent containing the microspheres, and the amount of the microspheres is determined by the volume or area size on the microsphere rolling surface of the guide part in a coating manner.

[0023] The solvent may be a volatile or non-volatile solvent.

[0024] The solvent is a water-soluble or water-insoluble solvent.

[0025] The microspheres are mixed in a volatile solvent and coated. After coating, the volatile solvent evaporates, and the remaining microspheres form a rollable microsphere layer.

[0026] The microspheres are mixed in a solution of a volatile solvent containing 1 to 10% of an oily substance and coated. After coating, the volatile solvent evaporates to form an oily substance film on the microspheres and the guide surface. The viscosity of the oily substance film can keep the microspheres on the microsphere rolling surface to form a rollable thin film microsphere layer.

[0027] The two surfaces forming the V-shaped cross-sectional shape in the gap with a V-shaped cross-sectional shape can be planes or arc surfaces; or, the extended surfaces of at least two gaps intersect to form a V-shaped cross-sectional shape, wherein the surface of each gap can be a plane or a circular or non-circular surface.

[0028] The piezoelectric driving method is an ultrasonic piezoelectric driving device, and positioning parts for limiting the deviation of the piezoelectric ceramic are arranged on the front, back, left and right sides perpendicular to the working surface of the piezoelectric ceramic.

[0029] The positioning part is arranged on the moving component, the fixing component or the spring component.

[0030] The shape of the gap formed by at least one straight-advance guide portion is a planar cross-sectional gap shape, including a planar groove and a planar protrusion, which are respectively arranged on either the fixed component or the movable component. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. 1 is a 3D side view showing a stepping motor driven camera 800 using the stepping motor of the first embodiment as a driving force.

[0032] Figure 2 FIG. 1 is a top view showing a stepping motor driven camera 800 according to the first embodiment.

[0033] Figure 3 AA cross-sectional view showing the stepping motor driven camera 800 in the first embodiment.

[0034] Figure 4-a This is an enlarged view of the C portion of the stepping motor driven camera 800 in Example 1.

[0035] Figure 4-b This is an enlarged view of the D portion of the stepping motor driven camera 800 in Example 1.

[0036] Figure 5 FIG. 1 is a front view showing a stepping motor driven camera 800 according to the first embodiment.

[0037] Figure 6 1 is an exploded view showing the stepping motor driven camera 800 in the first embodiment.

[0038] Figure 7 BB is a cross-sectional view showing the stepping motor driven camera 800 in the first embodiment.

[0039] Figure 8 FIG. 1 is a 3D side view showing the piezoelectric ultrasonic wave driven camera 900 of Example 2-1.

[0040] Fig. 9 FIG. 1 is a top view of a piezoelectric ultrasonic wave driven camera 900 according to Example 2-1.

[0041] Fig.10 AA cross-sectional view showing the piezoelectric ultrasonic wave driven camera 900 in Example 2-1.

[0042] Figure 11-a This is an enlarged view of the C portion of the piezoelectric ultrasonic wave driven camera 900 in Example 2-1.

[0043] Figure 11-b This is an enlarged view of the D portion of the piezoelectric ultrasonic wave driven camera 900 in Example 2-1.

[0044] Fig.12 FIG. 1 is a front view of a piezoelectric ultrasonic wave driven camera 900 according to Example 2-1.

[0045] Fig.13 BB is a cross-sectional view showing the piezoelectric ultrasonic wave driven camera 900 in Example 2-1.

[0046] Fig.14 It is an exploded view showing the piezoelectric ultrasonic wave driven camera 900 in Example 2-1.

[0047] Fig.15 FIG. 1 is a 3D side view showing the piezoelectric SIDM driven camera 1000 of the third and fourth embodiments.

[0048] Fig.16 FIG. 1 is a top view showing a piezoelectric SIDM driven camera 1000 according to the third and fourth embodiments.

[0049] Fig.17 AA cross-sectional view of the piezoelectric SIDM driving camera device 1000 in Examples 3 and 4.

[0050] Fig.18 AA cross-sectional view showing the piezoelectric SIDM driven camera 1200 in the fourth embodiment.

[0051] Figure 19-a This is an enlarged view of the C portion of the piezoelectric SIDM driven camera 1000 in the third embodiment.

[0052] Figure 19-b This is an enlarged view of the D portion of the piezoelectric SIDM driven camera 1000 in the third embodiment.

[0053] Figure 20-aThis is an enlarged view of the C portion of the piezoelectric SIDM driven camera 1000 in the fourth embodiment.

[0054] Figure 20-b This is an enlarged view of the D portion of the piezoelectric SIDM driven camera 1000 in the fourth embodiment.

[0055] Fig.21 This is an enlarged view of part E of the piezoelectric SIDM driven camera 1000 in the third and fourth embodiments.

[0056] Fig. 22 FIG. 1 is a front view of a piezoelectric SIDM driven camera 1000 according to the third and fourth embodiments.

[0057] Fig.23 BB is a cross-sectional view showing the piezoelectric SIDM driven camera 1000 in the third and fourth embodiments.

[0058] Fig.24 1 is an exploded view showing the piezoelectric SIDM driven camera 1000 in Example 3.

[0059] Figure 25-a 1 is an exploded view showing the rear side of the stepping motor driven camera 800 of Example 1.

[0060] Figure 25-b 1 is an exploded view showing the rear side of the piezoelectric ultrasonic driving device 900 of Example 2.

[0061] Figure 25-c 1 is an exploded view showing the rear side of the piezoelectric SIDM driven camera 1000 of Example 3.

[0062] Figure 25-d-1 1 is a disassembled view showing the rear side of the piezoelectric SIDM driven camera 1200 of Example 4.

[0063] Fig.26 It means that the microspheres and solvent are stirred in a container to form a microsphere solution.

[0064] Fig. 27 Schematic diagram showing the uniformly stirred microsphere solution being coated on the microsphere rolling surface (guide surface)

[0065] Fig.28 3D side view of the ultrasonic piezoelectric drive device in Example 2-2

[0066] Fig.29 It is a cross-sectional view taken along the line AA of the piezoelectric ultrasonic driving device 900 in Example 2-2.

[0067] Fig.30 It is a 3D side view showing the bottom structure of the flat compression spring 953 in Example 2-2.

[0068] Figure 31-a It is a cross-sectional view taken along the line AA of the piezoelectric ultrasonic driving device 900 in Example 2-2.

[0069] Figure 31-b This is an enlarged view of part E of the piezoelectric ultrasonic driving device 900 in Example 2-2.

[0070] Fig.32 2 is a disassembled view of the piezoelectric ultrasonic driving device 900 in Example 2-2.

[0071] Fig.33 3D side view of the ultrasonic piezoelectric drive device in Example 2-3

[0072] Fig.34 AA cross-sectional view of the piezoelectric ultrasonic driving device 900 in Example 2-3.

[0073] Figure 35-a AA cross-sectional view of the piezoelectric ultrasonic driving device 900 in Example 2-3.

[0074] Figure 35-b It is an enlarged view of part E of the piezoelectric ultrasonic driving device 900 in Example 2-3.

[0075] Fig.36 2-3 is a disassembled view of the piezoelectric ultrasonic driving device 900

[0076] Explanation of symbols

[0077] DW positioning part, IS image sensor chip, JX gap, LU lens, MB microsphere, PI photoelectric sensor, S fixing screw, SB chip substrate, XW limiter

[0078] 800 stepper motor drives the camera, 810 fixed frame, 814a V-shaped groove

[0079] 814b flat groove, 840 flat compression spring, 841 compression spring positioning hole

[0080] 842a flat spring arm a, 842b flat spring arm b, 850 stepper motor assembly

[0081] 851 stepper motor, 852 drive screw, 853 stepper motor fixing plate 854 screw follower, 854a threaded joint, 854b screw follower locating column 860 moving frame, 861 lens positioning hole, 862a leaf spring bearing a 862b leaf spring bearing b, 864a V-shaped protrusion, 864b flat protrusion

[0082] 900 piezoelectric ultrasonic drive camera, 910 fixed frame, 913 leaf spring positioning unit

[0083] 914 piezoelectric ceramic positioning unit

[0084] 914a V-groove, 914b flat groove, 950 ultrasonic drive assembly 951 ultrasonic piezoelectric ceramics, 951a superhard alloy block, 952 piezoelectric ceramic FPC

[0085] 953 flat compression spring, 953a piezoelectric ceramic Z-axis positioning, 953b flat compression spring arm 953c limit part, 954 steel plate, 956 piezoelectric ceramic mounting part, 960 moving frame, 961 lens positioning hole, 962 steel plate mounting surface

[0086] 963 limit part, 964a V-shaped protrusion, 964b flat protrusion

[0087] 965 through hole, 966 movable frame plane part, 973 limit part

[0088] 1000 piezoelectric SIDM driven camera, 1010 fixed frame, 1014a V-shaped groove

[0089] 1014b flat groove, 1050 laminated piezoelectric drive assembly, 1051 laminated piezoelectric ceramic

[0090] 1052 carbon fiber rod, 1053 heavy hammer, 1054 flat compression spring

[0091] 1054a Flat spring arm a, 1054b Flat spring arm b, 1054c V-shaped crimping part

[0092] 1055 driving micro ball rolling component, 1055a micro ball rolling surface, 1060 moving frame 1061 lens positioning hole, 1062a leaf spring supports a, 1062b leaf spring supports b

[0093] 1062c Leaf spring Z axis limit

[0094] 1064a V-shaped protrusion, 1064b flat protrusion, 1015SIDM fixed part

[0095] 1214a Semicircular groove

[0096] 1250 laminated piezoelectric drive assembly, 1254 flat compression spring, 1254a flat compression spring arm a

[0097] 1254b flat plate compression spring arm b, 1255 driving micro ball rolling component, 1255a micro ball rolling surface

[0098] 1260 mobile frame

[0099] 1264a semicircular protrusion, 1264b flat protrusion DETAILED DESCRIPTION

[0100] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention should be understood as not being limited to the embodiments described below, and the technical concept of the present invention can be implemented in combination with other known technologies or other technologies with the same functions as those known technologies, and the combination of features described in the embodiments is not necessarily all necessary for the solution of the invention.

[0101] In the following description of the specific embodiments, in order to clearly show the structure and working mode of the present invention, a number of directional words will be used for description, but the words "front", "rear", "left", "right", "outside", "inside", "outward", "inward", "axial", "radial" and the like should be understood as convenient terms, and should not be understood as restrictive terms. Unless otherwise specified, the qualifiers similar to "first" and "second" appearing in this article do not refer to the limitation of time sequence, quantity, or importance, but are only for distinguishing one technical feature from another technical feature in the technical solution. Similarly, the qualifiers similar to "one" appearing in this article do not refer to the limitation of quantity, but describe the technical features that have not appeared in the previous text. Similarly, the modifiers similar to "approximately" and "approximately" appearing before the numerals in this article usually include the number itself, and their specific meanings should be understood in combination with the context. Similarly, unless it is a noun modified by a specific quantitative quantifier, it should be regarded as including both the singular and the plural forms in this article, and the technical solution can include both the singular and the plural technical features.

[0102] The preferred specific embodiments of the present invention are described in this specification. The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Any technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments according to the concept of the present invention should be within the scope of the present invention.

[0103] The coordinate axes used in this description are as follows: the optical axis is the Z axis; the horizontal direction perpendicular to the Z axis is the X axis; and the vertical direction perpendicular to the Z axis is the Y axis.

[0104] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0105] The following, combined Figures 1 to 23An embodiment of a micro-ball guiding drive device is described.

[0106] Example 1

[0107] like Figure 1 , which is a 3D side view of a micro-ball-guided stepper motor-driven camera 800 with a stepper motor as a driving component of an electromechanical conversion element, including a lens LU, a stepper motor assembly 850, a fixed frame 810, a moving frame 860, and a chip substrate SB carrying a photosensitive chip.

[0108] like Figure 6 and Figure 25-a As shown in the exploded view, the fixed frame 810 is provided with a chip substrate SB of a photosensitive chip at the rear portion, and the front portion is square with a circular opening at the front end in the direction of the optical axis, which can accommodate a moving frame 860 that fixes the lens LU through a lens positioning hole 861. The photoelectric sensor PI for detecting the movement of the moving frame 860 is arranged above the rear portion. On the upper surface of the front portion of the fixed frame 810, a positioning DW of the stepper motor assembly 850 is provided, and the stepper motor assembly 850 can be fixed by screws s. In addition, two rows of V-shaped grooves 814a and planar grooves 814b parallel to the optical axis are formed. Microsphere layers composed of microspheres MB are respectively provided on the surfaces of the two rows of grooves, and the microsphere material is made of plastic. Regarding the arrangement method of the microspheres, as shown in FIG. Fig.26 As shown, a certain amount of microspheres MB and solvent are mixed in a container in a certain proportion. Fig. 27 As shown, the solvent containing microspheres is applied in a certain amount to the microsphere rolling surfaces of the V-shaped groove 814a and the plane groove 814b by automatic or manual coating before the stepper motor drives the camera 800 to be assembled. The selected solvent can be water-soluble or water-insoluble, volatile or non-volatile, etc. The solvent is a lubricant or lubricating oil with low viscosity, good lubricity, and moderate fluidity, or a mixed solution.

[0109] The moving frame 860 has a planar portion, on the upper surface of which are disposed semi-cylindrical bearings 862a and 862b, and at both ends of the bearings 862a and 862b, respectively, are provided with a limit portion XW for limiting the displacement of the flat spring 840 relative to the moving frame 860 in the optical axis direction during driving. Figure 25-a As shown, on the opposite side of the upper surface of the moving frame 860, a V-shaped protrusion 864a and a flat protrusion 864b are provided opposite to the V-shaped groove 814a and the flat groove 814b of the fixed frame 810.

[0110] The spring component is a flat compression spring 840, with a compression spring positioning hole 841 in the middle, and flat compression spring arm a 842a and flat compression spring arm b 842b on both sides.

[0111] The screw follower 854 is an arc-shaped component, and the two ends of one side of the axial inner arc are formed with threads ( Figure 6 The threaded joint 854a is not shown in FIG. Figure 7 As shown, a screw follower positioning column 854 b having a conical head that can be fixedly matched with the compression spring positioning hole 841 on the flat compression spring 840 is provided at the middle position of the bottom of the screw follower 854 .

[0112] like Figure 3 , Figure 7 As shown, the stepper motor assembly 850 is composed of a stepper motor 851 , a driving screw 852 , and a stepper motor fixing plate 853 .

[0113] The installation method of the stepper motor driven camera 800 is as follows Figure 6 As shown, first, the flat compression spring 840 is installed on the moving frame 860 with the flat compression spring arm a 842a and the flat compression spring arm b 842b respectively set on the bearing 862a and the bearing 862b within the limit XW of the moving frame 860 as a reference; secondly, the screw follower positioning column 854b of the screw follower 854 is aligned with the compression spring positioning hole 841 provided in the middle part of the flat compression spring 840, and the screw follower 854 is set on the flat compression spring 840 with the axial direction along the optical axis as a reference; then the V-shaped groove 814a and the plane groove 814b of the fixed frame 810 and the V-shaped protrusion 864a and the plane protrusion 864b of the moving frame 860 are respectively matched to form a V-shaped gap JX as a reference. In addition, another installation reference can also be set as needed, which is not described in detail here.

[0114] The moving frame 860, the plate spring 840, and the screw follower 854 are installed together on the fixed frame 810; then, the positioning hole on the stepper motor assembly 850 and the positioning hole of the positioning part DW of the fixed frame 810 are fixed with screws S in the direction of the optical axis, and after fixing, the driving screw 852 of the stepper motor assembly 850 and the threaded joint 854a of the screw follower 854 are threadedly engaged. Figure 7 As shown in FIG. 1 , the end diameter of the tapered portion of the positioning column 854b of the screw follower 854 is smaller than the root diameter, and the inner diameter of the compression spring positioning hole 841 of the flat compression spring 840 is between the end diameter and the root diameter of the positioning column 854b. After assembly, the compression spring positioning hole 841 in the middle of the flat spring 840 is subjected to downward pressure from the conical surface of the positioning column 854b of the screw follower 854, and as shown in FIG. Figure 3 Figure 4-a , Figure 4-bAs shown in the enlarged views C and D, at the positions on both sides where the flat compression spring arm a 842a and the flat compression spring arm b 842b of the flat compression spring 840 are respectively pressed against the supporting parts 862a and 862b of the moving frame 860, the two components of the aforementioned pressure are generated, which respectively apply pressure to the microballs MB located directly below the supporting parts 862a and 862b of the moving frame 860 and the two columns of microball guides formed by the aforementioned gap JX and the microball layer MB in the middle. As a result, the guiding surfaces of the V-shaped protrusion 864a and the plane protrusion 864b and the V-shaped groove 814a and the plane groove 814b are respectively pressed against the microballs MB in the gap JX to form two columns of microball guides parallel to the optical axis.

[0115] When the stepper motor assembly 850 is powered on and the screw 852 is driven to rotate, the flat compression spring arm a 842a and the flat compression spring arm b 842b of the flat compression spring 840 and the supporting parts 862a and 862b of the movable frame 860 are pressed against each other due to the above-mentioned spring force to generate static friction, and the middle compression spring positioning hole 841 of the flat spring 840 is positioned by the positioning column 854b of the screw follower 854, so that the screw follower 854 and the flat spring 840 cannot move together with the rotation of the driving screw 852 in a direction perpendicular to the optical axis. At the same time, the force from the compression spring positioning hole 841 of the flat compression spring 840 and the positioning column 854b of the screw follower 854 can make the thread of the driving screw 852 tightly engage with the thread of the screw follower 854, thereby limiting the backlash error during the thread engagement drive. In this way, the rotation of the driving screw 852 can only drive the screw follower 854 and the flat spring 840 together with the moving frame 860 to move straight relative to the fixed frame 810 along the direction of the two rows of microball guides. At this time, the microball MB rolls accordingly on the surface of the microball guide formed by the V-shaped groove 814a and the plane groove 814b of the fixed frame 810 and the V-shaped protrusion 864a and the plane protrusion 864b of the moving frame 860. As a result, the moving frame 860 fixed with the lens LU moves relative to the chip substrate SB fixed to the fixed frame 810, thereby realizing automatic focusing.

[0116] In addition, after assembly, when the solvent is water-soluble, it can be subjected to a pure water cleaning process. At this time, the solvent is dissolved, and after cleaning, only or part of the microsphere layer remains on the surface of the microsphere guide part (which can be a protrusion or a groove). When the solvent is non-water-soluble, the solvent is not easily dissolved by water and can continue to remain on the surface of the microsphere guide part together with the microspheres. When the solvent is non-volatile, it is the same as the above situation. When the solvent is volatile, after the solvent evaporates, only the microspheres remain on the surface of the microsphere guide part, which is more suitable for pure water cleaning.

[0117] Effect of Example 1

[0118] Effect 1-1

[0119] Compared with the prior art guide post-guided stepper motor-driven driver, the flat spring-pressed micro-ball-guided rolling guide structure can significantly reduce the sliding friction resistance compared with the prior art guide post-guided, making the stepper motor drive smoother. In addition, the flat spring press-fit structure is simpler and smaller in size than the prior art spiral spring press-fit structure.

[0120] Effect 1-2

[0121] The microsphere guide of this embodiment uses a solvent with low viscosity, better lubricity and fluidity than gel substances such as lubricating paste. Compared with the existing technology using lubricating grease, it can reduce the viscous resistance of the actuator during driving, and the driving performance is better and smoother. In addition, when the solvent is volatile, the microsphere solvent evaporates after coating, leaving only the microspheres on the guide surface, which is conducive to the implementation of cleaning with pure water or the like.

[0122] Example 2-1

[0123] like Figure 8 , which is a 3D side view of a piezoelectric ultrasonic-driven camera 900 using ultrasonic piezoelectric ceramics as an electromechanical conversion element and micro-ball-guided piezoelectric ultrasonic-driven camera 900. It includes a lens LU, an ultrasonic-driven assembly 950, a fixed frame 910, a moving frame 960, and a chip substrate SB carrying a photosensitive chip.

[0124] like Fig.14 and Figure 25-b As shown in the exploded view, the fixed frame 910 is provided with a chip substrate SB of a photosensitive chip at the rear portion, and the front portion is square with a circular opening at the front end in the direction of the optical axis, which can accommodate a moving frame 960 that fixes the lens LU through a lens positioning hole 961. The photoelectric sensor PI for detecting the movement of the moving frame 960 is arranged above the rear portion. A leaf spring positioning portion 913 is provided at the middle position of each of the two sides of the edge of the front portion of the fixed frame 910. Two rows of V-shaped grooves 914a and a plane groove 914b parallel to the optical axis are formed on the upper surface of the front portion of the fixed frame 910. Microsphere layers composed of microspheres MB are respectively provided on the surfaces of the two rows of grooves, and the microsphere material is made of plastic such as nylon. Regarding the arrangement method of the microspheres, as shown in FIG. Fig.26 As shown, a certain amount of microspheres MB and solvent are mixed evenly in a container in a certain proportion. Fig. 27 As shown, the solvent containing microspheres is applied in a certain amount to the microsphere rolling surfaces of the V-shaped groove 914a and the plane groove 914b by automatic or manual coating before the stepper motor drives the camera 800 to be assembled. The selected solvent can be water-soluble or water-insoluble, volatile or non-volatile, etc. The solvent is a lubricant or lubricating oil with low viscosity, good lubricity, and moderate fluidity, or a mixed solution.

[0125] The moving frame 960 has a plane portion, on the upper surface of which a positioning portion 962 for limiting the position of the steel plate 954 is provided, and in the X direction perpendicular to the optical axis, two parallel A-limiting portions 963 for limiting the deviation of the ultrasonic piezoelectric ceramic 951 are also provided, the height of which is higher than the plane surface of the moving frame 960. Figure 25-b As shown, on the opposite side of the upper surface of the moving frame 960, a V-shaped protrusion 964a and a flat protrusion 964b are provided opposite to the V-shaped groove 914a and the flat groove 914b of the fixed frame 910.

[0126] The spring component of this embodiment is also a flat compression spring. A piezoelectric ceramic mounting portion 956 is provided in the middle of the flat compression spring 953. On both sides of the optical axis direction of the piezoelectric ceramic mounting portion 956, as shown in FIG. Fig.13 As shown, piezoelectric ceramic axial positioning 953a is also provided. Fig.14 As shown, the two sides of the flat compression spring 953 are respectively the flat compression spring arms 953b.

[0127] The piezoelectric ultrasonic driven camera 900 is installed as follows Fig.10 , Figure 11-a , Figure 11-b , Fig.14 As shown. The ultrasonic drive assembly 950 is composed of an ultrasonic piezoelectric ceramic 951, a cylindrical superhard alloy block 951a, a piezoelectric ceramic FPC 952, a flat compression spring 953, and a steel plate 954. The ultrasonic piezoelectric ceramic 951 and the cylindrical superhard alloy block 951a are assembled into one piece by bonding in advance; then, the ultrasonic drive assembly 950 is assembled as shown in FIG. Fig.14 As shown, after the ultrasonic piezoelectric ceramic 951 and the piezoelectric ceramic FPC 952 are bonded together, the combination of the ultrasonic piezoelectric ceramic 951 and the piezoelectric ceramic FPC 952 is bonded to the piezoelectric ceramic mounting portion 956 in the middle of the flat compression spring 953 so that it is located in the optical axis direction as shown in FIG. Fig.13 and Fig.14 The front and rear piezoelectric ceramic Z-axis positioning 953a is shown. Fig.14 As shown, the steel plate 954 is attached to the positioning portion 962 formed on the upper surface of the moving frame 960.

[0128] When installing the piezoelectric ultrasonic driven camera 900, first use the V-shaped groove 914a and the flat groove 914b of the fixed frame 910 and the V-shaped protrusion 964a and the flat protrusion 964b of the movable frame 960 to form a V-shaped gap JX as a reference, and after the movable frame 960 and the fixed frame 910 are installed and positioned as described above, align the piezoelectric ceramic mounting portion 956 surface of the middle part of the flat compression spring 953 of the ultrasonic driving component 950 with the two limit portions A 963 on the upper surface of the movable frame 960 and the steel plate 954 already installed on the steel plate mounting surface 962 of the movable frame 960. After installation, the super-hard alloy block 951a contacts the surface of the steel plate. Then, the two flat compression spring arms 953b of the flat compression spring 953 are respectively set on the leaf spring positioning portion 913 of the fixed frame 910 in a downward pressing manner. Figure 8 , 10 , 11-a, 11-b, and 14, the rear sides of the two flat compression spring arms 953b are against the contact surface of the leaf spring positioning portion 913; in this way, the XYZ axial directions of the piezoelectric ceramic can be accurately installed and positioned.

[0129] After assembly, Fig.10 , 11-a As shown in FIGS. 11-b and 14, the elastic deformation of the flat spring 953 caused by the pressing installation on both sides generates stress, thereby generating a combined downward pressure on the ultrasonic piezoelectric ceramic 951 and the superhard alloy block 951a on the inner surface of the piezoelectric ceramic installation part 956 in the middle, so that the superhard alloy block 951a generates a pressing force against the steel plate 954 fixed to the moving frame 960. In addition, this pressing force also presses against the V-shaped protrusions 964a and the plane protrusions 964b on both sides of the moving frame 960 to form two component forces, and is respectively pressed against the V-shaped grooves 914a and the plane grooves 914b of the fixed frame 910 through the microballs MB.

[0130] Therefore, if Figure 11-a , Figure 11-b As shown in the enlarged views C and D, the guide surfaces of the V-shaped protrusion 964a and the planar protrusion 964b and the V-shaped groove 914a and the planar groove 914b are respectively pressed against the microspheres MB in the gap JX formed therebetween to form two rows of microsphere guides parallel to the optical axis.

[0131] When the ultrasonic drive assembly 950 is powered, the ultrasonic piezoelectric ceramic 951 generates elliptical vibrations, and the two superhard alloy blocks 951a bonded on the working surface of the ultrasonic piezoelectric ceramic 951 push the surface of the steel plate 954 according to the order of electrical signals and control. This drives the moving frame 960 to press the microspheres MB along the V-shaped protrusions 964a and the plane protrusions 964b and the V-shaped grooves 914a and the plane grooves 914b to make them roll, so that they move straightly in the direction parallel to the optical axis, so that the moving frame 860 fixed with the lens LU moves relative to the chip substrate SB fixed to the fixed frame 810, thereby achieving automatic focusing.

[0132] Due to the limiting part A 963 located on the surface of the moving frame 960, the ultrasonic piezoelectric ceramic 951 of the ultrasonic driving component 950 can be accurately installed at the X-axis position of the moving frame 960 surface perpendicular to the optical axis direction to prevent left and right deviations, thereby improving the installation accuracy and reducing the driving error.

[0133] In addition, after assembly, when the solvent is water-soluble, it can be subjected to a pure water cleaning process. At this time, the solvent is dissolved, and after cleaning, only or part of the microsphere layer remains on the surface of the microsphere guide part (which can be a protrusion or a groove). When the solvent is non-water-soluble, the solvent is not easily dissolved by water and can continue to remain on the surface of the microsphere guide part together with the microspheres. When the solvent is non-volatile, it is the same as the above situation. When the solvent is volatile, after the solvent evaporates, only the microspheres remain on the surface of the microsphere guide part, which is more suitable for pure water cleaning.

[0134] As the position limit of the piezoelectric ceramic in the X-axis direction, the limit part can also be set on the flat spring 953 or the fixed frame 910. As two other examples of this embodiment, only the different settings of the limit part on the spring and the fixed frame are shown in [Example 2-2] and [Example 2-3] respectively. Figure 28 to Figure 30 Description. Other points consistent with [Example 2-1] are not repeated. For the contents of [Example 2-1] that are the same as [Example 2-2] but not described in detail, they are briefly described in [Example 2-2].

[0135] Example 2-2

[0136] like Fig.30 As shown, on both sides of the piezoelectric ceramic mounting portion 956 of the flat compression spring 953 in the X direction, two limiting portions 953c are bent by sheet metal processing to determine the position and accuracy of the ultrasonic piezoelectric ceramic 951 in the X direction.

[0137] Two piezoelectric ceramic Z-axis positioning devices 953a are provided in the Z-axis direction, which are the same as those in Example 2-1. After installation, the positioning of the ultrasonic piezoelectric ceramic 951 in the Z-axis direction can be determined.

[0138] In the Y-axis direction, the piezoelectric ceramic mounting portion 956 is pressed by the pressing force of the inner surface thereof. Figure 31-b As shown in the enlarged view E, the Y-axis position of the ultrasonic driving component 50 and the ultrasonic piezoelectric ceramic 951 can be determined by crimping the steel plate mounting surface 962 of the movable frame 960, the steel plate 954, the superhard alloy block 951a, and the ultrasonic piezoelectric ceramic 951 to each other.

[0139] like Fig.28 , 29 As shown in , 32, unlike Example 2-1, only a steel plate mounting surface 962 is provided on the upper surface of the moving frame 960.

[0140] In this way, by setting the limit portion 953c on the flat spring 953, the X-axis position of the ultrasonic piezoelectric ceramic 951 of the ultrasonic driving assembly 950 can be accurately limited to prevent left and right deviations, thereby improving the installation accuracy and reducing the driving error. At the same time, as in Example 2-1, the position accuracy of the Y-axis and the Z-axis can also be ensured at the same time.

[0141] Example 2-3

[0142] like Fig.36 As shown, two integrally formed ultrasonic piezoelectric ceramic positioning parts 914 are provided in the middle of the upper surface of the fixed frame 910, which are used to position the ultrasonic piezoelectric ceramic 951 on the left and right sides in the X direction to prevent the ultrasonic piezoelectric ceramic 951 from shifting in the X direction. Through holes 965 are provided on both sides of the steel plate mounting surface 962 of the plane portion 966 of the movable frame 960 in the X direction, and the portion between the two through holes 965 is the steel plate mounting surface 962 for mounting the steel plate 954. Fig.33 , 34 As shown in FIGS. 35-a and 35-b, after assembly, the limiting portion 914 on the fixed frame 910 passes through the through hole 965 opened on the plane portion 966 of the movable frame 960, and the components of the ultrasonic driving assembly 950 including the ultrasonic piezoelectric ceramic 951 are all limited in the X-axis direction within the positioning portions 914 of the two ultrasonic piezoelectric ceramics. In this way, by setting the limiting portion 914 on the fixed frame 910, the X-axis position of the ultrasonic piezoelectric ceramic 951 of the ultrasonic driving assembly 950 can also be accurately limited to prevent left and right deviations, thereby improving installation accuracy and reducing driving errors.

[0143] At the same time, as in Example 2-1 and Example 2-2, the position accuracy of the Y-axis and the Z-axis can also be ensured at the same time.

[0144] Effects of Examples 2-1, 2-2, and 2-3

[0145] Effect 2-1

[0146] The ultrasonic piezoelectric driving structure with flat spring crimping and micro-ball guidance significantly reduces the sliding friction resistance compared to the guide column guidance in the prior art, making the stepper motor drive smoother.

[0147] Effect 2-2

[0148] The piezoelectric ceramic limiter is arranged on the movable frame or the fixed frame or the spring, so that the precision of the piezoelectric ceramic during installation and use can be effectively controlled, the installation precision can be improved, and the position deviation and driving error can be reduced.

[0149] Effect 2-3

[0150] The microsphere guide of this embodiment uses a solvent with low viscosity, better lubricity and fluidity than gel substances such as lubricating paste. Compared with the existing technology using lubricating grease, it can reduce the viscous resistance of the actuator during driving, and the driving performance is better and smoother. In addition, when the solvent is volatile, the microsphere solvent evaporates after coating, leaving only the microspheres on the guide surface, which is conducive to the implementation of cleaning with pure water or the like.

[0151] Example 3

[0152] like Fig.15 1 is a 3D side view of a micro-ball-guided piezoelectric SIDM-driven camera 1000 in which the electromechanical conversion element uses the piezoelectric SIDM as a driving component, and includes a lens LU, a piezoelectric SIDM driving assembly 1050, a fixed frame 1010, a moving frame 1060, and a chip substrate SB containing a photosensitive chip.

[0153] On the fixed frame 1010, as Fig.15 , 23 As shown in FIG. 24, the chip substrate SB of the photosensitive chip is installed at the rear, and the front part is square, with a circular opening at the front end in the optical axis direction, and the movable frame 1060 with the lens LU positioned therein can be accommodated therein. The positioning DW of the piezoelectric SIDM driving component 1050 is arranged on the fixed frame 1010, which is fixed by fixing screws s in this embodiment, and can also be fixed in other ways. A photoelectric sensor PI for detecting the movement amount of the movable frame 1060 is also arranged at the upper part.

[0154] Two rows of V-shaped grooves 1014a and planar grooves 1014b parallel to the optical axis are formed on one side of the front upper surface of the fixing frame 810. Microsphere layers composed of microspheres MB are respectively arranged on the surfaces of the two rows of grooves. The installation and setting of the microspheres are as follows: Fig.26 As shown, a certain amount of microspheres MB and solvent are mixed in a container in a certain proportion. Fig. 27As shown, a solution containing microspheres is applied in a certain amount to the microsphere rolling surface of the V-shaped groove 1014a and the plane groove 1014b by coating. The selected solvent can be a dry, wet or semi-wet lubricant or lubricating oil with low viscosity and moderate fluidity, and can also be water-soluble or water-insoluble, volatile or non-volatile.

[0155] like Fig.24 As shown, on the moving frame 1060, there is a lens positioning hole 1061 to fix the lens LU on the moving frame 1060; on the upper part of the upper surface of the moving frame 1060, there are support 1062a and 1062b of the flat spring 1040; Figure 25-c As shown, on the opposite side of the upper surface of the moving frame 1060 , a V-shaped protrusion 1064 a and a flat protrusion 1064 b are provided opposite to the V-shaped groove 1014 a and the flat groove 1014 b of the fixed frame 1010 .

[0156] On the piezoelectric SIDM assembly 1050, as Fig.23 , 24 As shown, a stacked piezoelectric ceramic 1051, a carbon fiber rod 852, and a weight 853 of a metal tungsten alloy are formed.

[0157] On the flat compression spring 1054, as Fig.24 As shown, a V-shaped crimping portion 1054c is provided in the middle.

[0158] On the driving bearing component 1055, as Fig.24 As shown, a through hole is formed at the rear portion to match and position with the positioning portion DW on the fixing frame 1010. A semicircular micro-ball rolling surface 1055a is formed on the bottom surface.

[0159] The following are the moving frame 1060, the piezoelectric SIDM driving assembly 1050, the flat compression spring 1040, the driving bearing component 1055, etc. Fig.24 As shown in the figure, the device is installed in the fixing frame 1010. Fig.17 and Figure 19-a , Figure 19-b As shown in the enlarged views C and D of FIG. 1 , the V-shaped groove 1014a and the plane groove 1014b of the fixed frame and the V-shaped protrusion 1064a and the plane protrusion 1064b of the movable frame 1060 respectively face each other to form a V-shaped gap JX and a plane gap JX, and a microsphere layer composed of a plurality of microspheres MB is formed between the V-shaped gap JX and the plane gap JX. The rolling surfaces of the microspheres MB are the surfaces of the V-shaped protrusion 1064a and the plane protrusion 1064b and the V-shaped groove 1014a and the plane groove 1014b. Fig.24 As shown, the flat plate compression spring 1054 is opened in the upward direction with the V-shaped compression joint 1064c of the compression spring, as shown in FIG. Figure 19-a , Figure 19-bAs shown in the enlarged views C and D of the figure, the flat spring arms 1054a and 1054b are respectively installed between the leaf spring bearings 1062a and 1062b of the moving frame 1060, and then the piezoelectric SIDM driving assembly 1050 formed by combining the laminated piezoelectric ceramic 1051, the carbon fiber rod 1052 and the weight 1053 in a bonding manner is preliminarily set on the SIDM fixing portion 1015 of the fixed frame 1010 with the outer circle of the weight 1053 as a reference, and is bonded and fixed, and the other end is set on the V-shaped crimping portion 1054 of the pre-installed flat spring 1054 with the outer circle of the carbon fiber rod 1052 as a reference. c, ; Apply a volatile solvent that is uniformly mixed with microspheres MB and contains 1-10% of oily substances to the semicircular inner surface microsphere rolling surface 1055a of the driving microsphere rolling component 1055. When the volatile solvent evaporates, the oily substances form an oily film on the microspheres MB and the microsphere rolling surface 1055a. The viscosity of the oily film fixes the microspheres MB on the microsphere rolling surface 1055a. The driving microsphere rolling component 1055 is fixed to the positioning part DW of the fixed frame 1010 through the fixing screws S, so that the piezoelectric SIDM driving component 1050 becomes a fixed component integrated with the fixed frame 1010. Fig.15 , 24 As shown, the driving support member 1055 is fixed to the fixed frame 1010 and becomes a fixed part; at this time, as shown in FIG. Fig.21 As shown, in the middle of the flat compression spring 1054, the V-shaped pressing surface of the V-shaped pressing portion 1054c is pressed against the outer circle of the carbon fiber rod 1052 of the piezoelectric SIDM driving component 1050, and is fixed to the outer circle of the carbon fiber rod 1052 in the X-axis and Y-axis directions; on the opposite side of the carbon fiber rod 1052 as the driving component that is pressed against the V-shaped pressing portion 1054c, as shown in FIG. Fig.15 , 17 The inner surface of the semicircular microsphere rolling surface 1055a of the driving bearing component 1055 shown in 19-a, 19-b, and 21 and the outer surface of the cylindrical carbon fiber rod 1052 of the piezoelectric SIDM driving component 1050 form a circular gap, and a microsphere layer formed by microspheres MB is arranged in the gap.

[0160] On both sides of the flat plate compression spring 1054, in the Z-axis direction, the flat plate compression spring arm a 1054a and the flat plate compression spring arm b 1054b of the flat plate compression spring 1054 are limited by the flat plate spring Z-axis limit 1062c at both ends of the flat plate spring bearing a 1062a and the flat plate spring bearing b 1062b on the moving frame 1060, so that the flat plate compression spring 1054 is fixed to the moving frame 1060 in the Z-axis direction to form a moving component; in the X-axis direction, due to the flat plate spring bearing a 1062a and the flat plate spring bearing b 1062b on the moving frame 1060 and the flat plate compression spring arm a 1054a and the flat plate compression spring arm b 1054b is only crimped and supported but not fixed. Therefore, the X-axis position of the flat compression spring 1054 is movable in the X-axis direction of its length direction due to the cooperation between the V-shaped crimping part 1054c and the outer circle of the carbon fiber rod 1052. The two only form the relationship between the driving component and the driven component required for friction drive and the required crimping force and friction force, and do not form the guiding function of the prior art. Thus, the V-shaped groove 1014a and the plane groove 1014b of the fixed frame and the V-shaped protrusion 1064a and the plane protrusion 1064b of the movable frame 1060 respectively form a V-shaped gap JX and a plane gap JX, and a microsphere guide formed by a microsphere layer composed of multiple microspheres MB is formed between the V-shaped gap JX and the plane gap JX, which does not form a double guide but forms mutual interference. In this way, the carbon fiber shaft of the SIDM driving component of the prior art is disassembled into a driving only function. The guidance is completed by the aforementioned microsphere guide.

[0161] After installing as described, Figure 19-a , Figure 19-b As shown, due to the different shapes of the flat compression spring 1054 in the free state and the installed state, the flat compression spring 1054 is compressed by the compression of the leaf spring bearing a 1062a and the leaf spring bearing b 1062b on both sides and the V-shaped compression part 1054c of the flat compression spring 1054 on the opposite side is deformed and stressed by the compression of the carbon fiber rod 1052 of the piezoelectric SIDM drive assembly, thereby generating opposite deformation stress, so that the micro-ball guide formed by the V-shaped groove 1014a and the plane groove 1014b of the fixed frame 1010 and the V-shaped protrusion 1064a and the plane protrusion 1064b of the moving frame 1060 at the corresponding position forms a certain force, that is, pre-pressure. So that the V-shaped groove 1014a and the plane groove 1014b of the fixed frame 1010 and the V-shaped protrusion 1064a and the plane protrusion 1064b of the moving frame 1060 are mutually compressed through the micro-balls MB therebetween.

[0162] When the piezoelectric SIDM drive assembly 1050 is driven by an electric signal, the laminated piezoelectric ceramic 1051 stretches and contracts forwards and backwards according to a certain pulse. Since the V-shaped crimping portion 1054c is subjected to the crimping force generated by the spring pressure between it and the carbon fiber rod 1052, the flat compression spring 1054 and the carbon fiber rod 1052 generate mutual friction. Due to the difference in pulse signal control, an axial front-to-back friction driving force is generated, driving the moving frame 1060 to perform linear driving along the direction of the microball guide formed by the V-shaped groove 1014a and the plane groove 1014b of the fixed frame 1010 and the V-shaped protrusion 1064a and the plane protrusion 1064b of the moving frame 1060. At this time, the microball MB rolls accordingly on the surface of the microball guide formed by the V-shaped groove 1014a and the plane groove 1014b of the fixed frame 1010 and the V-shaped protrusion 1064a and the plane protrusion 1064b of the moving frame 1060. At the same time, as Fig.21 As shown, on the opposite side of the friction pressing drive between the flat compression spring 1054 and the carbon fiber rod 1052 of the piezoelectric SIDM driving assembly 1050, there is a ball MB arranged to roll between the gap formed by the micro-ball rolling surface 1055a of the driving supporting component 1055 and the outer circle of the carbon fiber rod 1052. Since the rolling friction coefficient is smaller than the sliding friction resistance, compared with the friction clamping method of SIDM in the prior art, the micro-ball rolling guide between the carbon fiber rod 1052 and the driving supporting component 1055 of this embodiment can effectively improve the driving efficiency of the piezoelectric SIDM and reduce the friction resistance.

[0163] After assembly, when the solvent is water-soluble, it can be subjected to a pure water cleaning process. At this time, the solvent is dissolved, and after cleaning, only or part of the microsphere layer remains on the surface of the microsphere guide (which can be a protrusion or a groove). When the solvent is non-water-soluble, the solvent is not easily dissolved by water and can continue to remain on the surface of the microsphere guide together with the microspheres. When the solvent is non-volatile, the above situation will occur. When the solvent is volatile, after the solvent evaporates, the remaining microspheres are on the surface of the microsphere guide just east of the surface, which is more suitable for pure water cleaning.

[0164] Example 3

[0165] Effect 3-1

[0166] On the opposite side of the friction contact surface between the driving component and the driven component, a microsphere layer is arranged to roll on the rolling surface. Compared with the double V-shaped support clamping in the prior art, the sliding friction of the support on one side is converted into microsphere rolling friction, and the friction resistance is reduced, which can effectively improve the driving efficiency of the piezoelectric SIDM and reduce the friction resistance.

[0167] Effect 3-2

[0168] The guidance and friction drive of the driving device in the prior art, which uses both carbon rod friction drive and guidance, is changed to a separate microball guidance plus a separate carbon rod friction drive. This solves the mutual interference problem of product defects, facilitates quality control, and helps improve product quality.

[0169] Example 4

[0170] This embodiment adopts the same structure as that of the embodiment 3, and is different only in the cross-sectional shape of the microsphere guide. Therefore, the same parts are omitted and only the different parts are described.

[0171] like Figure 25-d-2 As shown, on the upper surface of the fixing frame 1210, there are provided a row of semicircular grooves 1214a and a row of flat grooves 1214b. Correspondingly, as shown in FIG. Figure 25-d-1 As shown, on the opposite side of the upper surface of the movable frame 1260, two rows of protrusions are provided corresponding to the upper surface of the fixed frame 1210, which are semicircular protrusions 1264a and planar protrusions 1264b. Fig.18 , 20-a 20-b, the semicircular groove 1214a and the plane groove 1214b are assembled with the semicircular protrusion 1264a and the plane protrusion 1264b to form a corresponding gap. A microsphere layer formed by coating a solvent mixed with microspheres is arranged between the gaps. The elastic force of the two flat compression spring arms 1254a and 1254b of the flat spring 1254 causes the semicircular groove 1214a and the plane groove 1214b to be pressed against the semicircular protrusion 1264a and the plane protrusion 1264b and the microsphere layer MB respectively. The diameter of the microsphere is about φ0.05㎜.

[0172] When the piezoelectric SIDM driving component is driven by an electric signal, the microball M rolls relative to the surface having the semicircular groove 1214a and the planar groove 1214b and the semicircular protrusion 1264a and the planar protrusion 1264b, so that the movable frame 1260 moves relative to the fixed frame 1210 along the direction of the microball guide formed by the semicircular groove 1214a and the planar groove 1214b, the semicircular protrusion 1264a and the planar protrusion 1264b and the microball MB.

[0173] Effect of Example 4

[0174] Effect 4-1

[0175] The reference guide formed by the semicircular groove on the fixed part and the semicircular protrusion on the moving frame and the microsphere layer between the gaps and the guide formed by the planar groove on the fixed part and the planar protrusion on the moving frame and the microspheres between the gaps have the same effect as the V-shaped guide in Example 3. Both can achieve guide positioning and reduce sliding friction, making the drive smooth.

[0176] Effect 4-2

[0177] The diameter of the microspheres is smaller than that of conventional balls, which can make the drive device smaller.

[0178] This novel use embodiment illustrates the present invention, but the technical scope of the present invention is not limited to the scope described in the above embodiment. For example, the driving component can also be a shape memory alloy method or a traditional electromagnetic drive method (such as a voice coil motor VCM) or a piezoelectric sheet can be a single layer or multi-layer plus spring sheet method or a piezoelectric ultrasonic or non-ultrasonic drive method, etc., without limitation. In addition, the solvent refers to a dry or wet or semi-wet lubricant or oil or a mixed liquid, a mixture, a fluid, a semi-fluid, etc. with low viscosity, good lubricity and moderate fluidity, and has the characteristics of being water-soluble or non-water-soluble, volatile or non-volatile. The above properties of the solution after mixing the microspheres remain unchanged. It is obvious to those skilled in the art that various changes or improvements can be made to the above embodiments, and such changes or improvements can also be included in the technical scope of the present invention.

[0179] The V-shape described in the present invention refers to a cross-sectional shape that is shaped like a V, an arc, a partial arc, or a trapezoid, or other shapes that play a similar role. The execution order of each process such as actions, steps, steps, and stages in the devices, systems, programs, and methods recorded or shown in the present invention is not specifically stated as "earlier", "before", etc. In addition, it should be noted that it can be implemented in any order as long as the output of the previous process is not used in the subsequent process. For the action flow recorded or shown in this application, even if it is explained using "first", "next", etc. for convenience, it does not mean that it must be implemented in this order.

Claims

1. An optical driving device, comprising a fixed component and a movable component, wherein the movable component moves under the guidance of two or more straight-moving guides formed on the fixed component and the movable component, and comprising a driving component arranged between the straight-moving guides or in parallel with the straight-moving guides, and gaps respectively located on the fixed component and the movable component and formed facing each other, and a microsphere layer composed of a plurality of microspheres interposed in the gaps, characterized in that: The invention comprises a spring component which applies interaction force to the driving component, the fixing component and the moving component, and the micro-ball rolling surface forming the gap is pressed against the micro-ball by the spring.

2. The optical drive device according to claim 1, characterized in that: The spring is a flat spring.

3. The optical drive device according to claim 1, characterized in that The aforementioned driving component adopts a piezoelectric driving method.

4. The optical drive device according to claim 1, characterized in that: The aforementioned driving component adopts electromagnetic driving mode.

5. The optical drive device according to claim 1, characterized in that: The aforementioned driving component adopts a shape memory alloy driving mode.

6. The optical driving device according to claim 1, characterized in that: The aforementioned driving components are driven by stepping motors.

7. The driving device according to claim 1, characterized in that: The shape of the gap formed in at least one of the straight-advance guide portions is a V-shaped cross-sectional gap shape, including a V-shaped groove and a V-shaped protrusion, which are respectively arranged on either the fixed component or the movable component.

8. The driving device according to claim 1, characterized in that: The gap formed by at least one of the straight guide parts is a cross-sectional gap shape of a circle or an arc, or a semicircle or a semiarc or a partial circle or a partial arc (hereinafter collectively referred to as a circle), including a circular groove and a circular protrusion, and the circular groove and the circular protrusion are respectively arranged on either the fixed part or the movable part.

9. The driving device according to claim 3, characterized in that: The driving member is a piezoelectric electromechanical conversion element, and the friction member and the driven member are brought into pressure contact with each other by a pressing force, thereby driving the driven member by a friction force.

10. The driving device according to claim 9, characterized in that: A microsphere layer is provided on the opposite side of the friction contact surface of the friction component.

11. The driving device according to claim 1, characterized in that: The microspheres are mixed in a prescribed amount in the solvent to form a solvent containing the microspheres, and the amount of the microspheres is determined according to the volume or area size on the microsphere rolling surface of the guide part in a coating manner.

12. The driving device according to claims 1 and 11, characterized in that: The solvent is a volatile or non-volatile solvent.

13. The driving device according to claims 1 and 11, characterized in that: The solvent is a water-soluble or water-insoluble solvent.

14. The driving device according to claim 12, characterized in that: The microspheres are mixed in a volatile solvent and coated. After coating, the volatile solvent evaporates, and the remaining microspheres form a rollable microsphere layer.

15. The driving device according to claim 12, characterized in that: The microspheres are mixed in a solution of a volatile solvent containing 1% to 10% of an oily substance and coated. After coating, the volatile solvent evaporates to form a thin film of the oily substance on the microspheres and the guide surface. The viscosity of the thin film of the oily substance can keep the microspheres on the rolling surface of the microspheres to form a rollable thin film microsphere layer.

16. The optical drive device according to any one of claims 1 and 7, characterized in that: The two surfaces forming the V-shaped cross-sectional shape in the gap having a V-shaped cross-sectional shape can be planes or arc surfaces, or at least two extended surfaces of the gaps intersect to form a V-shaped cross-sectional shape, wherein each surface of the gap can be a plane or a circular or non-circular surface.

17. The optical driving device according to claim 3, characterized in that: The piezoelectric driving method is an ultrasonic piezoelectric driving device, and positioning parts for limiting the deviation of the piezoelectric ceramic are arranged on the front, back, left and right sides perpendicular to the working surface of the piezoelectric ceramic.

18. The optical driving device according to claim 17, characterized in that: The positioning portion is arranged on the moving component, the fixing component or the spring component.

19. The optical driving device according to claim 1, characterized in that: The shape of the gap formed by at least one of the straight-advance guide parts is a planar cross-sectional gap shape, including a planar groove and a planar protrusion, which are respectively arranged on either the fixed component or the movable component.

Images