Optical drive device driven by electro-mechanical conversion member

Abstract

The invention discloses an optical driving device driven by an electromechanical conversion component, which comprises a fixed component, a movable component, driving components respectively arranged on the fixed component and the movable component, and force applying components respectively arranged on the fixed component and the movable component, the supporting parts are respectively arranged between the fixed part and the movable part and are provided with guide parts respectively arranged on the fixed part and the movable part and balls arranged between the guide parts; and the fixed part and the movable part are pressed and connected with each other through the support of the balls and the guide parts under the force applied by the force applying part. In the structure of the ball guide part, the ball is made of a high polymer material. The problem that impact pits are generated on the guide surface due to impact force on the driving motor can be relieved, and the manufacturing cost is reduced while the driving precision of the driving device is ensured.

Description

Technical Field

[0001] The invention relates to an optical driving device with an electromechanical conversion structure and a ball structure. Background Art

[0002] In recent years, optical drive devices with ball guides have been widely used in portable devices such as mobile phones, in which the ball materials are generally made of ceramic materials (such as alumina, etc.) or stainless steel, and the guide surface of the ball is generally made of high-hardness plastic materials (such as liquid crystal polymer LCP) or stainless steel materials combined with plastic. Since the Young's modulus, rigidity and specific gravity of the ceramic and stainless steel materials of the ball are greater than the plastic guide surface material, when impacted, pits or scars are easily formed on the material surface of the guide surface; when the drive device is stuck or not smooth due to the sliding of the ball and the guide surface, it is easy to scratch the guide surface or even produce debris, affecting the reliability and precision of the ball drive device. In order to improve this defect, the background technology generally improves the rigidity of the plastic material of the guide part by changing the material or by using the hardness of the material of the guide surface opposite to the ball, such as changing the material of the guide surface in contact with the ball to a high-hardness ceramic material to reduce the performance of the guide surface's resistance to impact pits and scars.

[0003] The above prior art includes the following documents.

[0004] Chinese Patent No.: CN111736296A

[0005] Chinese Patent No.: CN105929517B

[0006] The above prior art has the following disadvantages:

[0007] 1) If the guide surface material is made of high hardness and surface precision materials, the cost is high, which is not conducive to cost control.

[0008] 2) The material of the ball is ceramic or stainless steel, which is not conducive to cost control.

[0009] 3) The guide surface material is made of relatively high-hardness plastic. Due to the large difference in Young's modulus (rigidity) between plastic and ceramic or stainless steel balls, the impact performance improvement effect is limited. Impact pits are still easily generated, affecting accuracy.

[0010] 4) Due to problems with the design or manufacturing accuracy of the rolling guide, balls made of high-rigidity materials such as ceramics are prone to sliding friction with the plastic guide surface, causing hysteresis, jamming or scratches, and driving problems such as high driving current. Summary of the invention

[0011] In order to solve the aforementioned problems, an object of the present invention is to provide a low-cost ball-guided optical drive device that is resistant to impact pits or scratches and is conducive to stabilizing driving accuracy.

[0012] The present invention provides a low-cost ball-guided optical drive device which is resistant to impact pits or scratches and is conducive to stable driving, comprising: a fixed part, a moving part,

[0013] driving components respectively arranged on the fixed component and the movable component,

[0014] force-applying components respectively arranged on the fixed component and the movable component,

[0015] supporting components respectively arranged between the fixed component and the movable component,

[0016] The supporting member comprises guide parts respectively arranged on the fixed member and the movable member and balls arranged between the guide parts. The fixed member and the movable member are pressed and supported by each other through the balls under the force of the force applying member.

[0017] The material of the ball is a polymer material.

[0018] Preferably, the polymer material of the present invention is rubber.

[0019] Preferably, the polymer material of the present invention is plastic.

[0020] Preferably, the indicators of the polymer material of the present invention meet the following conditions:

[0021] The Young's modulus B range is: 0.1≦B≦20GPa;

[0022] The specific gravity D range is: 1≦D≦2.

[0023] Preferably, the materials of the fixed component and the movable component of the present invention are polymer materials that are the same as or have similar physical and chemical properties to the balls.

[0024] Preferably, the guide portion of the present invention includes at least one main guide portion or at least one auxiliary guide portion, which are called the fixed component main guide portion and the fixed component auxiliary guide portion on the fixed component side and are called the moving component main guide portion and the moving component auxiliary guide portion on the moving component side.

[0025] The main guide portion is a groove which is oppositely arranged on the fixed component and the movable component, and the groove has two guide surfaces which are respectively pressed and supported by the balls, and the angle between the two guide surfaces is V-shaped;

[0026] The auxiliary guide part has relative auxiliary guide part guide surfaces respectively arranged on the fixed part and the movable part, and the auxiliary guide part guide surface has a single guide surface that is single-point crimped and supported by the ball respectively, and the shape of the single guide surface is non-V-shaped; side walls may be provided on both sides of the single guide surface, or side walls may not be provided.

[0027] The beneficial effects of the present invention are: by using a ball bearing material with a Young's modulus and specific gravity similar to that of the guide surface material, and much lower than that of rigid materials such as ceramics or steel, the elasticity of the guide surface including the ball bearing is increased. When subjected to impact force, the elasticity of the material itself will buffer between the ball bearing surface and the guide surface, so that the plastic deformation of the surface due to the impact force is alleviated, thereby reducing the possibility of pits on the guide surface caused by the impact. Specifically, the present invention also has the following beneficial effects:

[0028] 1. Reduction of drive device cost:

[0029] The manufacturing cost of polymer balls is much lower than that of ceramic balls or stainless steel balls. At the same time, since the hardness or rigidity of the surface of the guide portion does not need to be increased too much, ordinary rigidity plastic materials can be used, so that the cost of the drive device can be further reduced.

[0030] 2. Improvement of driving performance of driving device:

[0031] Because the ball material is a polymer material with a lower Young's modulus, its surface elasticity is better than that of materials with a higher Young's modulus. When the ball and the guide surface are supported by the force-applying part, the ball and the guide surface will have appropriate slight elastic deformation, so that the static friction of the ball on the guide surface is strengthened. When driving, the ball surface and the guide surface are not easy to slide relative to each other, so that the ball is easier to form a stable rolling on the guide surface, thereby reducing the driving friction loss of the moving part relative to the fixed part. The smooth rolling of the ball in the driving device can reduce the driving hysteresis and jam of the driving device and improve the driving performance.

[0032] 3. Improvement of driving accuracy:

[0033] As described above, since the impact pits, scratches, etc. on the surface of the guide part can be reduced, the guide part accuracy of the ball guide drive device can be stabilized, and the accuracy is improved compared with the traditional ceramic or stainless steel ball drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 3D exploded oblique view of the ball guide drive device of Example 1 and Example 2 from one perspective

[0035] Figure 23D exploded oblique view of the ball guide drive device of Example 1 and Example 2 from another perspective

[0036] Figure 3 Cross-sectional view of the ball drive device with two rows of V-shaped main guides of Example 1

[0037] Figure 4-1 Cross-sectional view of a ball drive device having an auxiliary guide portion with an arc-shaped guide surface according to Example 2

[0038] Figure 4-2 Cross-sectional view of a ball drive device having a secondary guide portion with a flat surface and an arc-shaped guide surface according to Example 2

[0039] Figure 5 for Figure 3 The AA cross-sectional view is an illustration of the impact force on the ball guide of the prior art.

[0040] Figure 6 for Figure 3 The AA cross-sectional view is an illustration of the impact force on the ball guide portion of the present invention in Example 1.

[0041] Figure 7 for Figure 4-1 BB cross-sectional view is an illustration of the impact force condition of the ball guide portion of the present invention in Example 2

[0042] Explanation of symbols

[0043] 00 Housing

[0044] 1 Fixing parts

[0045] 2 Moving parts 23 Lens holding part

[0046] 3 Driving component 31 Coil 32 Driving magnet

[0047] 4 Support components

[0048] 41 Fixing component guide

[0049] 411 Fixed component main guide part

[0050] 412 Fixed component auxiliary guide

[0051] 42 Moving parts guide

[0052] 421 Moving parts main guide

[0053] 422 Moving part auxiliary guide

[0054] 43 Prior art ball: ceramic ball (or steel ball)

[0055] 431 Polymer material ball

[0056] 44 Main steering unit

[0057] 45 Auxiliary guide

[0058] 5. Force-applying components (detection and magnetic attraction unit)

[0059] 51 Hall element 52 Substrate 53 Detection magnet 6 Flat plate (magnetic material)

[0060] 7 Base DETAILED DESCRIPTION

[0061] 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.

[0062] In the description of the following specific embodiments, in order to clearly demonstrate the structure and working mode of the present invention, many 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.

[0063] 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 used to distinguish 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, 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 conjunction with the context. Similarly, unless it is a noun modified by a specific quantitative quantifier, it should be regarded as including both singular and plural forms in this article, and the technical solution can include both the singular and plural technical features.

[0064] 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.

[0065] Example 1: Figure 1 , Figure 2 , Figure 3The structure of the ball drive device shown is the same as that of the prior art, except that the balls in Example 1 are made of a plastic ball material different from that of the balls in the prior art. Figure 5 This is a schematic diagram of the impact deformation of the existing ball guide. Figure 6 FIG. 4 is a schematic diagram of the impact deformation of the ball guide of Example 1. Example 2 adopts the ball drive device structure of the guide structure shown in FIG. 4. Figure 7 It is a schematic diagram of the impact force and deformation of the ball in Example 2.

[0066] Example 1

[0067] Figure 1 The lower right corner is a 3D appearance diagram of an optical drive device whose electromechanical conversion form is electromagnetic drive mode (or commonly known as VCM mode). Figure 1 Figure 2 As shown, it is composed of a fixed component 1, a movable component 2, a driving component 3, a supporting component 4, a force-applying component (detection and magnetic attraction unit) 5, a flat plate (magnetic material) 6, etc. Figure 1 , Figure 2 The fixed member 1 and the movable member 2 are shown in a separated state. A ball 43 is provided between the fixed member 1 and the movable member 2 so as to be in contact with each other by pressure contact.

[0068] The moving part 2 has a lens carrying part 21 for fixing and carrying an optical lens, and moves in the fixed part 1 along the guide part (optical axis) formed by the fixed part guide part 41 and the moving part guide part 42. The fixed part 1 and the moving part 2 are both made of resin material (liquid crystal polymer LCP) and have a square shape. According to actual conditions, the shape can also be a closed rectangle or a rectangle with one side open.

[0069] The driving component 3 is composed of a coil 31 connected to a substrate 52 mounted on a fixed component 1 and a driving magnet 32 ​​mounted on both sides of the moving component. The driving magnet 32 ​​has different magnetic poles in the optical axis direction of the lens (Z-axis direction in the figure). By passing a current through the coil 31, an upward electromagnetic force can be applied to the moving component 2, and by passing a current opposite thereto, a downward electromagnetic force can be applied to the moving component 2. That is, the current flowing through the coil 31 can be controlled to drive the moving component 2 to any upper or lower position.

[0070] The force-applying component 5 (also referred to as a detection magnetic attraction unit in this embodiment 1) is composed of a magnet 53 for detection and attraction fixedly arranged on the moving component 2, and a Hall element 51 fixed to a substrate 52. The Hall element 51 and the two coils 31 are respectively fixed to the fixed component 1 through the substrate 52, respectively opposite to the driving magnet 32 ​​and the detection magnet 53, forming two driving components 3 and a detection unit 5. At the same time, a flat plate (magnetic material) 6 is provided on the outside of the substrate opposite to the detection magnet, forming a force-applying component 5, which attracts the fixed component 1 and the moving component 2 to each other by pressing and supporting the ball 43. This force-applying component has both position detection and magnetic attraction functions.

[0071] When the position of the moving member 2 detected by the magnetic attraction detecting means 5 is different from the position where the moving member 2 is intended to be arranged, current can be passed through the coil 31 to move the moving member 2 by the driving means 3 .

[0072] exist Figure 2 The fixed component guide 41 of the fixed component 1 is shown in the figure, and the fixed component guide 41 and the movable component guide 42 are opposite. The number of balls 43 is 3, and can also be 1 or more than 4. The number of guides of the fixed component guide 41 and the movable component guide 42 is preferably 2. The following are all examples of the number of guides being two.

[0073] The support member 4 includes a fixed member guide 41 formed by two parallel guides arranged on the fixed member 1, a moving member guide 42 arranged on the moving member 2 and opposite to the fixed member guide 41, and a ball 43 arranged between the fixed member guide 41 and the moving member guide 42. Figure 1 The fixing member guide 41 is not shown in FIG. Figure 2 Indicates from Figure 1 The fixing member guide 41 is an exploded perspective view viewed from the opposite direction.

[0074] The moving part 2 is attracted by the magnetic attraction of the detection magnetic attraction unit 5, and is supported on the fixed part 1 by the fixed part guide part 41, the corresponding moving part guide part 42 and the two rows of balls 43 in the inner part. The moving part 2 is driven by the electromagnetic driving force and different driving directions of the driving part 3, and moves in the guide direction of the guide part as the balls 43 roll.

[0075] like Figure 3The figure shows an assembly cross-sectional view of a ball-guided optical drive device of the prior art. The fixed component 41 is formed with two rows of main guide portions 411 respectively pressed against the balls 43, and the angle between the two pressing surfaces of each row of main guide portions 411 is V-shaped. The movable component 42 is formed with two rows of movable component main guide portions 421 respectively pressed against the balls 43, and the fixed component main guide portions 411 and the movable component main guide portions 421 are opposite to each other and are respectively pressed against the balls 43 to support each other to form two rows of main guide portions 44.

[0076] like Figure 3 and Figure 5 As shown, it is a driving device of the prior art that the material of the ball 43 is ceramic. Among them, the material of the fixed part 1 and the moving part 2 is generally liquid crystal polymer LCP (specifically, the product name is LCP525T, etc.), whose bending modulus (Young's modulus) is about 12GPa and specific gravity is about 1.4 or less; the material of the ball 43 is ceramic (generally alumina), whose Young's modulus is about 350GPa and specific gravity is 3.89.

[0077] When subjected to impact force such as falling, Figure 3 As shown, the surfaces of the ball 43 and the fixed part main guide portion 411 and the moving part main guide portion 421 provided on the fixed part 1 and the moving part 2 are all impacted by different degrees of impact force F. Since the Young's modulus of the materials of the ball 43 and the fixed part main guide portion 411 and the moving part main guide portion 421 differ greatly, about 350÷12=29 times, therefore, as Figure 5 As shown in the schematic diagram of the impact state in the middle, when the impact force acts, the force deformation of the pressing support points of the ball 43 and the fixed part main guide part 411 and the moving part main guide part 421 is mainly generated on the surface of the fixed part main guide part 411 and the moving part main guide part 421 formed of the liquid crystal polymer LCP material formed by plastic on the side with a smaller Young's modulus, while the ball 43 with a large Young's modulus is very little deformed by the impact force, as shown in FIG. Figure 5 As shown in the figure, the impact deformation can be ignored. Therefore, the prior art can be basically regarded as a single-sided impact deformation mode. When the impact force is greater than the plastic deformation stress of the material of the fixed part main guide part 411 and the moving part main guide part 421 formed by the liquid crystal polymer LCP material, the force deformation is too large, such as Figure 5 As shown in the figure after the impact, the surfaces of the fixed part main guide part 411 and the moving part main guide part 421 cannot completely recover their original shapes, and permanent plastic deformation pits are formed on the surfaces of the fixed part main guide part 411 and the moving part main guide part 421, thereby affecting the driving accuracy.

[0078] This embodiment 1 adopts Figure 3The optical drive device structure of the prior art shown in the figure is exactly the same, except that the material of the ball 43 is replaced with a plastic material, resulting in a ball 431 with the same dimensions but different physical properties. Since the material of the ball 431 is a plastic material (nylon material is used in this embodiment 1) with a Young's modulus similar to that of the fixed component main guide portion 411 and the movable component guide portion 421, Figure 6 As shown in the schematic diagram of the impact, when subjected to impact force, since the Young's modulus of the stressed ball 431 and the fixed component main guide portion 411 and the movable component guide portion 421 are similar, the stress deformation is no longer a unilateral impact deformation mode in which the fixed component main guide portion 411 and the movable component guide portion 421 are mainly generated on one side as in the prior art, but a bilateral impact deformation mode in which the surfaces of the ball 431 and the fixed component main guide portion 411 and the movable component main guide portion 421, which have similar Young's modulus and are made of the same plastic material, jointly generate a similar degree of deformation.

[0079] Therefore, the elastic deformation of the ball 431 and the elastic deformation of the surface of the fixed part main guide part 411 and the moving part main guide part 421 form a double-sided deformation to form a spring-like force buffer. Therefore, under the same impact force, the deformation of the ball 431, the fixed part main guide part 411 and the moving part main guide part 421 can be reduced by half compared with the deformation of the fixed part main guide part 411 and the moving part main guide part 421 in the prior art. Figure 6 As shown in the figure after the impact, when the impact force is equivalent to that of the prior art and is appropriate, that is, when the deformation amount due to the impact force is within the elastic deformation amount range of the fixed part main guide part 411 and the moving part main guide part 421 surface and the ball 431, the elastic deformation of the ball 431 and the fixed part main guide part 411 and the moving part main guide part 421 surface can completely restore the original shape. Therefore, the risk of pits on the fixed part main guide part 411 and the moving part main guide part 421 surface can be avoided.

[0080] In addition, since the Young's modulus of the material of the ball 431 is smaller than that of the ball 43, and the material has good elasticity, when the ball 431 and the surfaces of the fixed part main guide part 411 and the moving part main guide part 421 are pressed and supported against each other by the magnetic attraction of the force-applying part 5, the surface of the ball 431 will have a relatively appropriate small elastic deformation compared to the ball 43, and the point contact is appropriately formed into a surface contact with a certain small area, so that the static friction force formed by the ball 431 being pressed and supported against the surfaces of the fixed part main guide part 411 and the moving part main guide part 421 is strengthened. As a result, the ball 431 is not easy to slip relative to the surfaces of the fixed part main guide part 411 and the moving part main guide part 421, and can roll more stably on the surfaces of the fixed part main guide part 411 and the moving part main guide part 421 without easily generating sliding friction resistance. That is, the friction resistance between the moving part 2 and the fixed part 2 is smaller. Therefore, when driving, the driving friction loss of the ball 431 relative to the moving part 2 and the fixed part 1 is lower than that of the ball 43. The smooth rolling of the motor can reduce the hysteresis and jamming of the motor drive and improve the driving performance. Although the present embodiment 1 adopts a ball guide part formed by two rows of main guide parts 44 with a V-shaped cross section formed by the main guide part 411 of the fixed part and the main guide part 421 of the moving part without distinguishing between the main guide part and the auxiliary guide part, it is easy to interfere with the ball 43 or the ball 431 to increase the friction resistance, but compared with the use of the ball 43 with a large Young's modulus and high rigidity, the ball 431 has a small Young's modulus and a large elasticity, and can relatively appropriately produce elastic deformation when interference occurs between parts, and appropriately absorb the interference caused by the two rows of main guide parts 44 and the ball 43 or 431, which helps the ball 431 to roll relatively stably in the main guide part 44, thereby relatively reducing the sliding friction resistance caused by the interference when the ball 43 is used. This can improve the smoothness of the motor drive.

[0081] Example 2

[0082] like Figure 1 , Figure 2 As shown, the embodiment 2 adopts the same driving device structure as the embodiment 1. Therefore, the description of the driving device structure is omitted in the embodiment 2, and the differences from the embodiment 1 are specifically described. Figure 4-1As shown, the ball guide structure of the second embodiment is provided with a main guide portion 44 and a secondary guide portion 45 . Among them, the auxiliary guide part 45 is composed of a fixed component auxiliary guide part 412 with an arc surface, a movable component auxiliary guide part 422 with an arc surface, and a ball 431 arranged therebetween. Preferably, the arc surface of the fixed component auxiliary guide part 412 is an arc, and its radius R is greater than the ball radius r. The arc surface of the fixed component auxiliary guide part 412 is single-point pressed on one side of the fixed component 1 of the ball 431; the movable component auxiliary guide part 422 is an arc surface. Preferably, the arc surface of the movable component auxiliary guide part 422 is an arc, and its radius R is greater than the ball radius r. After assembly, the arc surface R of the movable component auxiliary guide part 422 is single-point pressed on one side of the movable component 2 of the ball 431; in addition, since the fixed component auxiliary guide part 412 and the movable component auxiliary guide part 422 are both arcs, the space on both sides of the ball 431 is smaller than the ball diameter, so there is no need to worry that the ball will fall off, so there is no need to set side edges on both sides of the fixed component auxiliary guide part 412 and the movable component auxiliary guide part 422.

[0083] The materials of the fixed component 1 and the movable component 2 of this embodiment 2 are both LCP525t, etc. The bending modulus (Young's modulus) of LCP is 12GPa, and the specific gravity is about 1.4 or less; the materials of the balls 431 of the main guide part 44 and the auxiliary guide part 45 are both plastic materials with physical properties similar to those of the materials of the fixed component 1 and the movable component 2 (nylon is used in this embodiment 2).

[0084] like Figure 7 As shown in the middle figure of the impact, when the driving device of the present embodiment 2 is subjected to a certain tolerable impact force, since the Young's modulus of the ball 431 is close to the Young's modulus of the fixed component auxiliary guide portion 412 and the movable component auxiliary guide portion 422, the force deformation of the ball 431 and the fixed component auxiliary guide portion 412 and the movable component auxiliary guide portion 422 is no longer a single-sided impact deformation mode mainly generated on the fixed component auxiliary guide portion 412 and the movable component auxiliary guide portion 422 and the fixed component main guide portion 411 and the movable component main guide portion 421 as in the prior art, but a double-sided impact deformation mode in which the surfaces of the ball 431 and the fixed component main guide portion 411 and the movable component main guide portion 421 and the fixed component auxiliary guide portion 412 and the movable component auxiliary guide portion 422, which have similar Young's modulus and are made of the same plastic material, jointly produce a similar degree of deformation.

[0085] Therefore, the elastic deformation of the ball 431 and the elastic deformation of the surfaces of the fixed part main guide 411 and the moving part main guide 421 and the fixed part main guide 411 and the moving part main guide 421 and the fixed part auxiliary guide 412 and the moving part auxiliary guide 422 form a double-sided deformation of comparable degree, thereby forming a spring-like force buffer. Therefore, under the action of the same impact force, the deformation of the ball 431 and the fixed part main guide 411 and the moving part main guide 421 and the fixed part auxiliary guide 412 and the moving part auxiliary guide 422 can be reduced by half compared with the deformation of the fixed part main guide 411 and the moving part main guide 421 in the prior art. Figure 7 As shown in the figure after the impact, when the impact force is equivalent to that of the prior art and is appropriate, that is, when the deformation amount due to the impact force is within the elastic deformation range of the surfaces of the fixed part main guide part 411 and the moving part main guide part 421, the fixed part auxiliary guide part 412, the moving part auxiliary guide part 422, and the ball 431, the elastic deformation of the surface of the ball 431 and the fixed part main guide part 411 and the moving part main guide part 421, and the fixed part auxiliary guide part 412 and the moving part auxiliary guide part 422 can completely restore the original shape. Thereby, the risk of pits on the surfaces of the fixed part main guide part 411 and the moving part main guide part 421 can be avoided.

[0086] In addition, the ball 431 of the auxiliary guide portion is Figure 2 The magnetic attraction of the force-applying component 5 shown in the figure and the two facing arc-surface fixed component auxiliary guides 412 and movable component auxiliary guides 422 form auxiliary guides 45 in a manner of facing single-point crimping, thereby forming a ball guide support component 4 together with the ball 431 of the main guide 44, thereby crimping and supporting the fixed part 1 and the movable part 2. The ball guide structure of Example 2 having the main guide 44 and the auxiliary guide 45, compared with the ball guide structure formed by the two rows of main guides 44 of Example 1, does not cause mutual interference between the ball 431 and the main guide 44 and the auxiliary guide 45, and has smaller friction resistance. Therefore, it is easier for the ball 431 to form a stable rolling in the main guide 44 and the auxiliary guide 45, so that the friction resistance between the movable part 2 and the fixed part 1 can be reduced to a lower level. Therefore, preferably, the present invention is more inclined to adopt the combination of the ball guide structure of the present Example 2 that distinguishes the main guide and the auxiliary guide and the ball 431 with a relatively smaller Young's modulus.

[0087] The auxiliary guide portion 45 of this embodiment is pressed together with the ball 431 at a single point on one side, and forms or partially forms the shape of the single guide surface of the auxiliary guide portion 412 of the fixed component and the auxiliary guide portion 422 of the movable component. In addition to the arc in this embodiment 2, other non-V-shaped surfaces, such as planes, aspherical surfaces, etc., are not limited. And the single guide surfaces of the auxiliary guide portion 412 of the fixed component and the auxiliary guide portion 422 of the movable component are not limited in what surface shape and how to combine them. The two sides of the surface shape can be provided with side walls or separately provided according to actual conditions, or no side walls can be provided. For example Figure 4-2 The auxiliary guide 44 has a flat surface on one side of the fixed part 1, side walls on both sides, and a gap between the side walls and the ball bearings; and an arc surface on one side of the moving part 2. The other parts are described in both the first embodiment and the second embodiment, and will not be described in detail below.

[0088] The ball guide optical drive device of the present invention includes, but is not limited to, applications such as autofocus drive device, optical anti-shake drive device, optical zoom device, etc. The drive mode of electromechanical conversion of the present invention includes, but is not limited to, voice coil motor (magnetic coil) mode, piezoelectric drive mode, memory alloy SMA mode or ultrasonic drive mode.

Claims

1. An optical driving device driven by an electromechanical conversion component, comprising: Fixed parts, Moving parts, driving components respectively arranged on the fixed component and the movable component, force-applying components respectively arranged on the fixed component and the movable component, supporting components respectively arranged between the fixed component and the movable component, The supporting member comprises guide parts respectively arranged on the fixed member and the movable member and balls arranged between the guide parts, and the fixed member and the movable member are pressed against each other by the force applied by the force applying member and supported by the balls and the guide parts. The characteristic is that the material of the ball is a polymer material.

2. An optical drive device according to claim 1, characterized in that: The polymer material meets the following conditions: the Young's modulus B range is: 0.1≦B≦20GPa; The specific gravity D range is: 1≦D≦2.

3. An optical drive device according to claim 1, characterized in that: The polymer material is a plastic material.

4. The optical drive device according to claim 1, characterized in that: The polymer material is a rubber material.

5. An optical drive device according to any one of claims 1, characterized in that: The materials of the fixed component and the moving component are polymer materials with the same or similar physical and chemical properties as the balls.

6. The optical driving device driven by an electromechanical conversion component according to any one of claims 1 to 5, characterized in that: The guide portion includes at least one main guide portion or at least one auxiliary guide portion, The main guide portion is a groove which is oppositely arranged on the fixed component and the movable component, and the groove has two guide surfaces which are respectively pressed and supported by the balls, and the angle between the two guide surfaces is V-shaped; The auxiliary guide part has relative auxiliary guide part guide surfaces respectively arranged on the fixed part and the movable part, and the auxiliary guide part guide surface has a single guide surface that is single-point crimped and supported by the ball respectively, and the shape of the single guide surface is non-V-shaped; side walls may be provided on both sides of the single guide surface, or side walls may not be provided.

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