Anti-shake motor

Abstract

The invention provides an anti-shake motor which can improve the accuracy of real-time position detection of a rotor. In the anti-shake motor, a first mover is arranged above a base, a second mover is arranged above the first mover, and a circuit board comprises a first polar plate and two second polar plates; the first part of the first floating polar plate and the first polar plate form a first sub-capacitor; the fourth part of the second floating polar plate and the second part of the first floating polar plate form a second sub-capacitor; the eighth part of the third floating polar plate and the fifth part of the second floating polar plate form a third sub-capacitor, and the seventh part of the third floating polar plate and the second polar plate form a fourth sub-capacitor; the capacitor between the first pole plate and any second pole plate is formed by connecting a first sub-capacitor, a second sub-capacitor, a third sub-capacitor and a fourth sub-capacitor in series, and the capacitance values of the first sub-capacitor, the second sub-capacitor and the fourth sub-capacitor are not changed when the second mover reciprocates along the second direction relative to the first mover; and the capacitance value of the third sub-capacitor is changed.

Description

Technical Field

[0001] The present application relates to the technical field of camera equipment, and in particular to an anti-shake motor. Background Art

[0002] In order to improve the image quality of the camera when shooting, optical image stabilization technology can be used in the camera to compensate for the shaking of the camera itself. When performing motion compensation, the gyroscope in the anti-shake motor of the camera is usually used to detect the shaking, and then the anti-shake motor moves the lens in the opposite direction to compensate for the image blur caused by the shaking of the camera.

[0003] In order to achieve fast and stable focusing, the camera modules in most current camera equipment usually use a closed-loop control method to detect the real-time position of the actuator in the focus motor during the focusing process, and adjust the drive current of the drive lens according to the detected position of the actuator so that the actuator can quickly reach the accurate focus position. When detecting the real-time position of the actuator, a Hall sensor and a corresponding magnet for sensing are usually used for detection.

[0004] However, there is currently a problem of inaccurate real-time position detection of the mover. Summary of the invention

[0005] The embodiment of the present application provides an anti-shake motor, which is at least beneficial to improving the accuracy of real-time position detection of the mover.

[0006] According to some embodiments of the present application, on the one hand, an anti-shake motor is provided in the embodiments of the present application, including: a base; a first mover, the first mover is suspended above the base, the first mover can reciprocate relative to the base along a third direction, and the third direction is perpendicular to the bottom surface of the base; a second mover, the second mover is suspended above the first mover, the second mover can reciprocate relative to the first mover along a first direction and a second direction, when the first mover reciprocates relative to the base along the third direction, it drives the second mover to reciprocate along the third direction, the first direction intersects with the second direction and is parallel to the bottom surface of the base; a circuit board, the circuit board is fixed on the base and surrounds the first mover, the circuit board includes a first electrode plate and two second electrode plates, the first electrode plate and the second electrode plate are connected to the detection circuit; a first floating electrode plate, the first floating electrode plate is located on the first mover, the first floating electrode plate includes a first part and a second part electrically connected to each other, the first part is located on the side wall of the first mover and is directly opposite to the first electrode plate to form a first sub-capacitor, and the second part is located on the second floating electrode plate. a bottom surface of a mover; a second floating electrode plate, the second floating electrode plate is located on the second mover, the second floating electrode plate comprises a fourth portion and a fifth portion electrically connected to each other, the fourth portion and the fifth portion are both located on the bottom surface of the second mover, the fourth portion is directly opposite to the second portion to form a second sub-capacitor; two third floating electrode plates, the third floating electrode plate is located on the first mover, the third floating electrode plate comprises a seventh portion and an eighth portion electrically connected to each other, the seventh portion is located on the side wall of the first mover, the eighth portion is located on the bottom surface of the first mover, the eighth portion of any third floating electrode plate is directly opposite to the fifth portion to form a third sub-capacitor, the seventh portions of the two third floating electrode plates are respectively directly opposite to the two second electrode plates to form two fourth sub-capacitors; the capacitance between the first electrode plate and any second electrode plate is composed of a first sub-capacitor, a second sub-capacitor, a third sub-capacitor and a fourth sub-capacitor connected in series, and during the period when the second mover reciprocates relative to the first mover along the second direction, the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the fourth sub-capacitor remain unchanged, while the capacitance value of the third sub-capacitor changes.

[0007] In some embodiments, a length of the first electrode plate along the third direction is greater than a length of the first portion along the third direction.

[0008] In some embodiments, the orthographic projection of the second portion on the bottom surface of the base covers the orthographic projection of the fourth portion on the bottom surface of the base; or, the orthographic projection of the fourth portion on the bottom surface of the base covers the orthographic projection of the second portion on the bottom surface of the base.

[0009] In some embodiments, the eighth portions of the two third floating plates are arranged along the second direction.

[0010] In some embodiments, the circuit board further includes: two third electrodes, the third electrodes are connected to the detection circuit; the second floating electrode further includes: a sixth part electrically connected to the fourth part and the fifth part, the sixth part is located on the bottom surface of the second mover; the anti-shake motor further includes: two fourth floating electrodes, the fourth floating electrode is located on the first mover, the fourth floating electrode includes a ninth part and a tenth part electrically connected to each other, the ninth part is located on the side wall of the first mover, and the tenth part is located on the bottom surface of the first mover, the tenth part of any fourth floating electrode plate is opposite to the sixth part to form a fifth sub-capacitor, and the ninth parts of the two fourth floating electrodes are respectively opposite to the two third electrodes to form two sixth sub-capacitors; the capacitance between the first electrode plate and any third electrode plate is composed of a first sub-capacitor, a second sub-capacitor, a fifth sub-capacitor and a sixth sub-capacitor connected in series, and during the period when the second mover moves back and forth relative to the first mover along the first direction, the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the sixth sub-capacitor remain unchanged, and the capacitance value of the fifth sub-capacitor changes.

[0011] In some embodiments, the tenth portions of the two fourth floating plates are arranged along the first direction.

[0012] In some embodiments, the second electrode plate is located on a side surface of the circuit board along the first direction, and the third electrode plate is located on a side surface of the circuit board along the second direction.

[0013] In some embodiments, the circuit board also includes: two fourth electrodes, which are connected to the detection circuit; the first floating electrode also includes: a third part electrically connected to the first part and the second part, the third part is located on the side wall of the first mover, and the third part is opposite to any fourth electrode plate to form a seventh sub-capacitor; the capacitance between the first electrode plate and any fourth electrode plate is composed of a first sub-capacitor and a seventh sub-capacitor connected in series, and during the period when the first mover moves back and forth relative to the base along the third direction, the capacitance value of the first sub-capacitor remains unchanged, and the capacitance value of the seventh sub-capacitor changes.

[0014] In some embodiments, along the third direction, a width of the fourth electrode plate is less than or equal to a width of the third portion.

[0015] In some embodiments, along the third direction, a spacing between the fourth plates is smaller than a width of the third portion.

[0016] The technical solution provided by the embodiments of the present application has at least the following advantages: In the anti-shake motor provided in the embodiment of the present application, the first electrode plate and the second electrode plate are used to connect to the detection circuit, and the capacitance between the first electrode plate and any second electrode plate is composed of a first sub-capacitor, a second sub-capacitor, a third sub-capacitor and a fourth sub-capacitor connected in series. The first sub-capacitor is composed of the first electrode plate and the first part of the first floating electrode plate facing each other, the second sub-capacitor is composed of the fourth part of the second floating electrode plate facing each other and the second part of the first floating electrode plate facing each other, the third sub-capacitor is composed of the eighth part of the third floating electrode plate facing each other and the fifth part of the second floating electrode plate facing each other, and the fourth sub-capacitor is composed of the seventh part of the third floating electrode plate facing each other and the second electrode plate facing each other. During the period when the second mover reciprocates relative to the first mover in the second direction, since the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the fourth sub-capacitor remain unchanged, and only the capacitance value of the third sub-capacitor changes, the change in capacitance value between the first electrode plate and any second electrode plate is linearly related to the movement displacement of the second mover relative to the base in the second direction. Based on the capacitance value between the first electrode plate and any second electrode plate, the position change of the second mover relative to the base can be obtained, and then the position of the second mover is adjusted by the driving mechanism to compensate for the displacement caused by the shaking, thereby improving the anti-shake accuracy of the anti-shake motor. Since the first electrode plate and the second electrode plate are both located on the circuit board, and the circuit board is fixed on the base, the detection circuits of the first electrode plate and the second electrode plate do not need to be connected to any mover, and thus the detection circuit will not be affected by the movement of the first mover or the second mover, which is conducive to improving the accuracy of detecting the real-time position of the mover, the accuracy of the drive signal generated by the corresponding driving mechanism is improved, and the anti-shake accuracy of the anti-shake motor is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise specified, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present application or the technical solutions in the traditional technology, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 An exploded view of the anti-shake motor provided in an embodiment of the present application at a certain viewing angle; Figure 2 An exploded view of the anti-shake motor provided in an embodiment of the present application from another perspective; Figure 3 A top view of each electrode plate provided in an embodiment of the present application relative to the bottom surface of the base; Figure 4 A schematic diagram of the position structure of each electrode plate corresponding to the embodiment of the present application; Figure 5 Two schematic diagrams of orthographic projections of the eighth part and the fifth part on the bottom surface of the base provided in the embodiments of the present application. DETAILED DESCRIPTION

[0019] As can be seen from the background technology, there is currently a problem of inaccurate real-time position detection of the mover.

[0020] The embodiment of the present application provides an anti-shake motor, which is at least beneficial to improving the accuracy of real-time position detection of the mover.

[0021] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0022] In the description of the embodiments of the present application, “plurality” means more than two, unless otherwise clearly and specifically defined.

[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0025] In the description of the embodiments of the present application, technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0026] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0027] In the description of the embodiments of the present application, when a certain component “includes” another component, unless otherwise stated, other components are not excluded and other components may be further included.

[0028] The terms used in the description of the various described embodiments herein are used only to describe specific embodiments and are not intended to be limiting. As used in the description of the various described embodiments and the appended claims, "components" are also intended to include plural forms unless the context clearly indicates otherwise.

[0029] The following will describe the various embodiments of the present application in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present application, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in the present application can be implemented.

[0030] Figure 1 An exploded view of the anti-shake motor provided in an embodiment of the present application at a certain viewing angle; Figure 2 An exploded view of the anti-shake motor provided in an embodiment of the present application from another perspective; Figure 3 A top view of each electrode plate provided in an embodiment of the present application relative to the bottom surface of the base; Figure 4 The schematic diagram of the position structure of each electrode plate provided in the embodiment of the present application. Figure 1 and Figure 2 In the figure, the positions corresponding to the first electrode plate, the second electrode plate, the third electrode plate and the fourth electrode plate are indicated by dashed boxes; Figure 4 In the figure, for the convenience of illustration, only one side surface of the circuit board on which the first electrode plate and the third electrode plate are disposed and one side surface on which the second electrode plate and the third electrode plate are disposed are shown, and the other two side surfaces are not shown.

[0031] refer to Figures 1 to 4 The anti-shake motor provided in the embodiment of the present application includes: a base 101, a first mover 111, a second mover 112, a circuit board 104, a first floating pole plate 121, a second floating pole plate 122 and a third floating pole plate 123.

[0032] The first mover 111 is suspended above the base 101 . The first mover 111 can reciprocate relative to the base 101 along a third direction Z, and the third direction Z is perpendicular to the bottom surface of the base 101 .

[0033] The second mover 112 is suspended above the first mover 111. The second mover 112 can reciprocate along the first direction X and the second direction Y relative to the first mover 111. When the first mover 111 reciprocates along the third direction Z relative to the base 101, it drives the second mover 112 to reciprocate along the third direction Z. The first direction X intersects with the second direction Y and is parallel to the bottom surface of the base 101.

[0034] The circuit board 104 is fixed on the base 101 and surrounds the first mover 111 . The circuit board 104 includes a first electrode plate 141 and two second electrode plates 142 . The first electrode plate 141 and the second electrode plate 142 are connected to a detection circuit (not shown in the figure).

[0035] The first floating electrode plate 121 is located on the first mover 111 and includes a first portion 131 and a second portion 132 electrically connected to each other. The first portion 131 is located on the side wall of the first mover 111 and faces the first electrode plate 141 to form a first sub-capacitor. The second portion 132 is located on the bottom surface of the first mover 111.

[0036] The second floating plate 122 is located on the second mover 112 and includes a fourth portion 134 and a fifth portion 135 electrically connected to each other. The fourth portion 134 and the fifth portion 135 are both located on the bottom surface of the second mover 112. The fourth portion 134 faces the second portion 132 to form a second sub-capacitor.

[0037] There are at least two third floating pole plates 123, which are located on the first mover 111. The third floating pole plates 123 include a seventh portion 137 and an eighth portion 138 which are electrically connected to each other. The seventh portion 137 is located on the side wall of the first mover 111, and the eighth portion 138 is located on the bottom surface of the first mover 111. The eighth portion 138 of any third floating pole plate 123 is opposite to the fifth portion 135 of the second floating pole plate 122 to form a third sub-capacitor, and the seventh portions 137 of two third floating pole plates 123 are opposite to the two second pole plates 142 respectively to form two fourth sub-capacitors.

[0038] The capacitance between the first electrode plate 141 and any second electrode plate 142 is composed of a first sub-capacitor, a second sub-capacitor, a third sub-capacitor and a fourth sub-capacitor connected in series. During the period when the second mover 112 moves back and forth relative to the first mover 111 along the second direction Y, the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the fourth sub-capacitor remain unchanged, while the capacitance value of the third sub-capacitor changes.

[0039] In the anti-shake motor provided in the embodiment of the present application, the second mover 112 is used to place the lens, the first mover 111 moves along the third direction Y relative to the base 101 to drive the second mover to move along the third direction Y, and then drives the lens to move along the optical axis to achieve focusing of the lens; the second mover 112 moves along the first direction X or the second direction Y relative to the first mover 111 to achieve dual-axis anti-shake of the lens along the direction perpendicular to the optical axis. Among them, the first electrode plate 141 and the second electrode plate 142 are used to connect to the detection circuit. The capacitance between the first electrode plate 141 and any second electrode plate 142 is composed of a first sub-capacitor, a second sub-capacitor, a third sub-capacitor and a fourth sub-capacitor connected in series. The first sub-capacitor is composed of the first electrode plate 141 and the first part 131 of the first floating electrode plate 121 facing each other. The second sub-capacitor is composed of the fourth part 134 of the second floating electrode plate 122 and the second part 132 of the first floating electrode plate 121 facing each other. The third sub-capacitor is composed of the fifth part 135 of the second floating electrode plate 122 and the eighth part 138 of the third floating electrode plate 123 facing each other. The fourth sub-capacitor is composed of the seventh part 137 of the third floating electrode plate 123 and the second electrode plate 142 facing each other. During the period when the second mover 112 reciprocates along the second direction Y relative to the first mover 111, the first mover 111 generates a displacement along the second direction Y relative to the second mover 112. Since the second mover 112 can only reciprocate along the third direction Y relative to the base 101, no relative displacement will occur between the second mover 112 and the base 101 in the first direction X or the second direction Y. Therefore, the displacement of the second mover 112 relative to the first mover 111 along the second direction Y is equivalent to the relative displacement of the second mover 112 relative to the base 101 along the second direction Y. During the period when the second mover 112 reciprocates relative to the first mover 111 along the second direction Y, since the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the fourth sub-capacitor remain unchanged, and only the capacitance value of the third sub-capacitor changes, the change in capacitance between the first electrode 141 and any second electrode 142 is linearly related to the movement displacement of the second mover 112 relative to the base 101 along the second direction Y. Based on the capacitance value between the first electrode 141 and any second electrode 142, the position change of the second mover 112 relative to the base 101 can be obtained, and then the position of the second mover 112 is adjusted through the driving mechanism to compensate for the displacement caused by the shake, thereby improving the anti-shake accuracy of the anti-shake motor. Since the first electrode plate 141 and the second electrode plate 142 are both located on the circuit board 104, and the circuit board 104 is fixed on the base 101, the detection circuits of the first electrode plate 141 and the second electrode plate 142 do not need to be connected to any mover, and thus the detection circuits will not be affected by the movement of the first mover 111 or the second mover 112, which is beneficial to improving the accuracy of detecting the real-time displacement of the mover, improving the accuracy of the driving signal generated by the corresponding driving mechanism, and improving the anti-shake accuracy of the anti-shake motor.

[0040] refer to Figure 1 and Figure 2 The anti-shake motor may further include an upper cover 102 and a pressure plate 103. The upper cover 102 and the base 101 form a receiving cavity. The first mover 111, the second mover 112 and the circuit board 104 are all received in the receiving cavity. The pressure plate 103 may play a protective role to avoid damage or contamination of the internal components of the anti-shake motor.

[0041] The anti-shake motor also includes multiple balls 106. The balls 106 are arranged between the first mover 111 and the base 101 to enable the first mover 111 to move relative to the base 101 along the third direction Z; the balls 106 are arranged between the bottom of the second mover 112 and the first mover 111 to enable the second mover 112 to move relative to the first mover 111 along the first direction X or the second direction Y.

[0042] A plurality of magnets 105 are also provided in the anti-shake motor, and a driving coil (not shown in the figure) is provided in the corresponding circuit board 104. The magnets 105 and the driving coil constitute a driving mechanism. The magnets 105 fixed on the side wall of the first mover 111 and the corresponding driving coils are used to drive the first mover 111 to move relative to the base 101 along the third direction Z; the magnets 105 fixed on the side wall of the second mover 112 along the first direction X and the driving coils corresponding to the magnets 105 fixed on the side wall of the second mover 112 along the second direction Y are used to drive the second mover 112 to move relative to the first mover 111 along the first direction X or the second direction Y.

[0043] The circuit board 104 may further include: two third electrodes 143, the third electrodes 143 are connected to the detection circuit; the second floating electrode 122 may further include: a sixth portion 136 electrically connected to the fourth portion 134 and the fifth portion 135, the sixth portion 136 being located on the bottom surface of the second mover 112; the anti-shake motor may further include: two fourth floating electrodes 124, the fourth floating electrode 124 being located on the first mover 111, the fourth floating electrode 124 including a ninth portion 139 and a tenth portion 130 electrically connected to each other, the ninth portion 139 being located on the side wall of the first mover 111, the tenth portion 130 being located on the bottom surface of the first mover 111, the tenth portion 130 of any fourth floating electrode 124 being opposite to the sixth portion 136 of the second floating electrode 122 to form a fifth sub-capacitor, and the ninth portions 139 of the two fourth floating electrodes 124 being opposite to the two third electrodes 143 respectively to form two sixth sub-capacitors.

[0044] The capacitance between the first electrode plate 141 and any third electrode plate 143 is composed of a first sub-capacitor, a second sub-capacitor, a fifth sub-capacitor and a sixth sub-capacitor connected in series. During the period when the second mover 112 reciprocates relative to the first mover 111 along the first direction X, the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the sixth sub-capacitor remain unchanged, while the capacitance value of the fifth sub-capacitor changes.

[0045] During the period when the second mover 112 reciprocates relative to the first mover 111 along the first direction X, the first mover 111 generates a displacement along the first direction X relative to the second mover 112. Since the second mover 112 can only reciprocate along the third direction Y relative to the base 101, no relative displacement will occur between the second mover 112 and the base 101 in the first direction X or the second direction Y. Therefore, the displacement of the second mover 112 relative to the first mover 111 along the first direction X is equivalent to the relative displacement of the second mover 112 relative to the base 101 along the first direction X. During the reciprocating motion of the second mover 112 relative to the first mover 111 along the first direction X, since the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the sixth sub-capacitor remain unchanged, and only the capacitance value of the fifth sub-capacitor changes, the change in capacitance between the first electrode plate 141 and any third electrode plate 143 is linearly related to the movement displacement of the second mover 112 relative to the base 101 along the first direction X. Based on the capacitance value between the first electrode plate 141 and any third electrode plate 143, the position change of the second mover 112 relative to the base 101 can be obtained, and then the position of the second mover 112 is adjusted through the driving mechanism to compensate for the displacement caused by the jitter, thereby improving the anti-shake accuracy of the anti-shake motor.

[0046] The circuit board 104 may further include: two fourth plates 144, the fourth plates 144 are connected to the detection circuit; the first floating plate 121 further includes: a third portion 133 electrically connected to the first portion 131 and the second portion 132, the third portion 133 is located on the side wall of the first mover 111, and the third portion 133 is directly opposite to any fourth plate 144 to form a seventh sub-capacitor. The capacitance between the first plate 141 and any fourth plate 144 is formed by the first sub-capacitor and the seventh sub-capacitor being connected in series, and during the period when the first mover 111 reciprocates relative to the base 101 along the third direction Z, the capacitance value of the first sub-capacitor remains unchanged, and the capacitance value of the seventh sub-capacitor changes. In this way, the change in capacitance between the first electrode 141 and any fourth electrode 144 is linearly related to the movement displacement of the first mover 111 relative to the base 101 along the third direction Z. Based on the capacitance between the first electrode 141 and any fourth electrode 144, the position change of the first mover 111 relative to the base 101 can be obtained, and then the position of the first mover 111 is adjusted through the driving mechanism to compensate for the displacement caused by the vibration, thereby improving the anti-shake accuracy of the anti-shake motor.

[0047] In some embodiments, the length of the first electrode plate 141 along the third direction Y is greater than the length of the first portion 131 along the third direction Y. The actual area between the first electrode plate 141 and the first portion 131 for charge storage is the effective area of ​​the first sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the first electrode plate 141 on the surface of one side of the circuit board 104 and the orthographic projection of the first portion 131 on the same surface of the circuit board 104. Since the first mover 111 can only move along the third direction Z relative to the base 101, the length of the first electrode plate 141 along the third direction Y is greater than the length of the first portion 131 along the third direction Y, which is conducive to ensuring that during the movement of the first mover 111 along the third direction Z relative to the base 101, the effective area of ​​the first sub-capacitor will not change due to the first portion 131 exceeding the first electrode plate 141, thereby preventing the capacitance value of the first sub-capacitor from changing.

[0048] It should be noted that, in this embodiment, the shape of the first electrode plate 141 and the shape of the first part 131 are both rectangular, which does not constitute a limitation on the shape of the first electrode plate 141 and the shape of the first part 131. In other embodiments, the shape of the first electrode plate and the shape of the second part can also be circular, triangular, trapezoidal or polygonal, etc., as long as the effective area between the first electrode plate and the first part remains unchanged when the first mover moves relative to the base along the third direction, so that the capacitance value of the first sub-capacitor does not change.

[0049] In this embodiment, the orthographic projection of the second portion 132 on the bottom surface of the base 101 covers the orthographic projection of the fourth portion 134 on the bottom surface of the base 101. In other embodiments, the orthographic projection of the fourth portion on the bottom surface of the base covers the orthographic projection of the second portion on the bottom surface of the base.

[0050] The actual area of ​​the second part 132 and the fourth part 134 available for charge storage is the effective area of ​​the second sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the second part 132 on the bottom surface of the base 101 and the orthographic projection of the fourth part 134 on the base of the base 101. Since the second mover 112 can only move along the first direction X or the second direction Y relative to the first mover 111, the distance between the second part 132 and the fourth part 134 does not change. When the orthographic projection of the second part 132 on the bottom surface of the base 101 covers the orthographic projection of the fourth part 134 on the bottom surface of the base 101, or the orthographic projection of the fourth part 134 on the bottom surface of the base covers the orthographic projection of the second part on the bottom surface of the base, during the movement of the second mover 112 relative to the first mover 111 along the first direction X or the second direction Y, it can be further ensured that the effective area of ​​the second sub-capacitor does not change, thereby making the capacitance value of the second sub-capacitor does not change.

[0051] It should be noted that, in this embodiment, the shape of the second portion 132 and the shape of the fourth portion 134 are both triangles, which does not constitute a limitation on the shape of the first electrode plate 141 and the shape of the first portion 131. In other embodiments, the shape of the first electrode plate and the shape of the second portion may also be circular, elliptical, trapezoidal or polygonal, etc., as long as the effective area between the second portion and the fourth portion remains unchanged when the second mover moves relative to the first mover along the first direction or the second direction, so that the capacitance value of the second sub-capacitor does not change.

[0052] In this embodiment, the eighth portions 138 of the two third floating plates 123 are arranged along the second direction Y. In other embodiments, the angle between the arrangement direction of the eighth portions of the two third floating plates and the second direction may be greater than 0° and less than 90°, such as 30°, 45° or 60°.

[0053] Figure 5 Two schematic diagrams of orthographic projections of the eighth part and the fifth part on the bottom surface of the base provided in the embodiment of the present application, wherein the fifth part is in a semi-transparent state to facilitate display of the overlapping area of ​​the eighth part and the fifth part.

[0054] The actual area between the eighth portion 138 and the fifth portion 135 for charge storage is the effective area of ​​the third sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the eighth portion 138 on the bottom surface of the base 101 and the orthographic projection of the fifth portion 135 on the base of the base 101. Figure 5 The eighth portions 138 of the two third floating pole plates 123 are arranged along the second direction Y. When the second mover 112 moves along the second direction Y relative to the first mover 111, the effective area between the fifth portion 135 and the eighth portion 138 of any third floating pole plate 123 changes, and the capacitance value of the corresponding third sub-capacitor changes.

[0055] refer to Figure 5 In (a), the length of the fifth portion 135 along the first direction X may be greater than the length of the eighth portion 138 along the first direction X; or, referring to Figure 5 In (b), the length of the fifth portion 135 along the first direction X may be less than the length of the eighth portion 138 along the first direction X; or, the length of the fifth portion along the first direction may be equal to the length of the eighth portion along the first direction. Figure 5 In (a), the length of the fifth portion 135 along the second direction Y may be greater than the spacing between the eighth portions 138 of the two third floating plates; or, referring to Figure 5In (b), the length of the fifth portion 135 along the second direction Y may be equal to the spacing between the eighth portions 138 of the two third floating plates; or, the length of the fifth portion along the second direction may be smaller than the spacing between the eighth portions of the two third floating plates.

[0056] It should be noted that the size and shape of the fifth portion 135 and the size and shape of the eighth portion 138 can be adjusted according to actual conditions, so that when the second mover 112 moves relative to the first mover 111 along the second direction Y, the effective area between the fifth portion 135 and the eighth portion 138 of any third floating pole plate 123 changes, so that the capacitance value of the third sub-capacitor changes.

[0057] The actual area available for charge storage between the seventh portion 137 of the third floating electrode 123 and the second electrode 142 is the effective area of ​​the fourth sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the second electrode 142 on the surface of one side of the circuit board 104 and the orthographic projection of the seventh portion 137 on the same surface of the circuit board 104. The shape and size of the second electrode 142 and the shape and size of the seventh portion 137 can be adjusted according to actual conditions, as long as the effective area between the seventh portion 137 and the second electrode 142 remains unchanged when the first mover 111 moves relative to the base 101 along the third direction Z, so that the capacitance value of the fourth sub-capacitor does not change. The specific settings can refer to the aforementioned first electrode 141 and the first portion 131, which will not be repeated here.

[0058] In this embodiment, the tenth portions 130 of the two fourth floating plates 124 are arranged along the first direction X. In other embodiments, the angle between the arrangement direction of the tenth portions of the two fourth floating plates and the first direction may be greater than 0° and less than 90°, such as 30°, 45° or 60°.

[0059] The actual area between the tenth part 130 and the sixth part 136 that can be used for charge storage is the effective area of ​​the fifth sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the tenth part 130 on the bottom surface of the base 101 and the orthographic projection of the sixth part 136 on the bottom surface of the base 101. The shape and size of the sixth part 136 and the shape and size of the tenth part 130 can be adjusted according to actual conditions, and it is only necessary to satisfy that during the period when the second mover 112 moves relative to the first mover 111 along the first direction X, the effective area between the sixth part 136 and the tenth part 130 of any fourth floating plate 124 changes, so that the capacitance value of the fifth sub-capacitor changes. The shape and size of the sixth part 136 and the shape and size of the tenth part 130 can refer to the fifth part 135 and the eighth part 138 mentioned above, and will not be repeated here.

[0060] The actual area between the ninth part 139 and the third electrode plate 143 that can be used for charge storage is the effective area of ​​the sixth sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the ninth part 139 on the surface of one side of the circuit board 104 and the orthographic projection of the third electrode plate 143 on the same surface of the circuit board 104. The shape and size of the third electrode plate 143 and the shape and size of the ninth part 139 can be adjusted according to actual conditions, and it is only necessary to ensure that when the first mover 111 moves relative to the base 101 along the third direction Z, the effective area between the third electrode plate 143 and the ninth part 139 remains unchanged, so that the capacitance value of the sixth sub-capacitor does not change. The specific settings can refer to the aforementioned first electrode plate 141 and the first part 131, and will not be repeated here.

[0061] The actual area between the third part 133 and the fourth electrode plate 144 for charge storage is the effective area of ​​the seventh sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the fourth electrode plate 144 on the surface of one side of the circuit board 104 and the orthographic projection of the third part 133 on the same surface of the circuit board 104. The shape and size of the third part 133 and the shape and size of the fourth electrode plate 144 can be adjusted according to actual conditions, and it is only necessary to satisfy that when the first mover 111 moves relative to the base 101 along the third direction Z, the effective area between the third part 133 and the fourth electrode plate 144 changes, so that the capacitance value of the seventh sub-capacitor changes. For specific settings, reference can be made to the aforementioned fifth part 135 and eighth part 138.

[0062] In some embodiments, along the third direction Z, the width of the fourth electrode plate 144 is less than or equal to the width of the third portion 133. In this way, the third portion 133 can always generate an effective area with any fourth electrode plate 144 during the movement, thereby avoiding the problem of sudden changes in capacitance detection, thereby improving the accuracy of position detection and the anti-shake precision of the anti-shake motor.

[0063] In some embodiments, along the third direction Z, the spacing between the fourth plates 144 is smaller than the width of the third portion 133. In this way, it is possible to avoid the situation where the two fourth plates 144 cannot obtain capacitance when the third portion 133 moves between the fourth plates 144, thereby avoiding the problem of sudden changes in capacitance detection, thereby improving the accuracy of position detection and the anti-shake precision of the anti-shake motor.

[0064] In this embodiment, the second electrode plate 142 and the third electrode plate 143 are both located on the same side surface of the circuit board 104 along the second direction Y. In other embodiments, the second electrode plate may be located on one side surface of the circuit board along the first direction, and the third electrode plate may be located on one side surface of the circuit board along the second direction. Accordingly, the position of the seventh portion 137 of the third floating electrode plate 123 that forms the fourth sub-capacitor with the second electrode plate 142 may be adjusted according to the position of the second electrode plate 142, and the position of the ninth portion 139 of the fourth floating electrode plate 124 that forms the sixth sub-capacitor with the third electrode plate 143 may be adjusted according to the position of the third electrode plate 143.

[0065] In some embodiments, during the period when the second mover 112 moves relative to the first mover 111 along the first direction X, the capacitance value of the third sub-capacitor may not change, so that the movement of the second mover 112 relative to the first mover 111 along the first direction X is only linearly related to the change of the fifth sub-capacitor; in some embodiments, during the period when the second mover 112 moves relative to the first mover 111 along the first direction X, the capacitance value of the third sub-capacitor may change, so that the movement of the second mover 112 relative to the first mover 111 along the first direction X is linearly related to the change of the third sub-capacitor and the fifth sub-capacitor, and by testing the combined capacitance values ​​corresponding to the second mover 112 relative to the first mover 111 in multiple motion states, the relative position relationship between the second mover 112 and the first mover 111 can also be inferred. Similarly, during the period when the second mover 112 moves relative to the first mover 111 along the second direction Y, the fifth capacitance value may not change or may change.

[0066] It should be noted that in the drawings provided in this embodiment, the shapes and positions of the electrical connection lines between the first part 131, the second part 132 and the third part 133 corresponding to the first floating pole plate 121 are only examples, and do not constitute a limitation on the shapes and positions of the electrical connection lines between the first part 131, the second part 132 and the third part 133. The shapes and positions of the electrical connection lines between the first part 131, the second part 132 and the third part 133 can be adjusted according to actual conditions. Similarly, the shapes and positions of the electrical connection lines between the fourth part 134, the fifth part 135 and the sixth part 136 corresponding to the second floating pole plate 122 can be adjusted according to actual conditions; the shapes and positions of the electrical connection lines between the seventh part 137 and the eighth part 138 corresponding to the third floating pole plate 123 can be adjusted according to actual conditions; the shapes and positions of the electrical connection lines between the ninth part 139 and the tenth part 130 corresponding to the fourth floating pole plate 124 can be adjusted according to actual conditions.

[0067] In the anti-shake motor provided in the embodiment of the present application, the first electrode plate 141 and the second electrode plate 142 are used to be connected to the detection circuit, and the capacitance between the first electrode plate 141 and any second electrode plate 142 is composed of a first sub-capacitor, a second sub-capacitor, a third sub-capacitor and a fourth sub-capacitor connected in series. The first sub-capacitor is composed of the first electrode plate 141 and the first part 131 of the first floating electrode plate 121 facing each other, the second sub-capacitor is composed of the fourth part 134 of the second floating electrode plate 122 facing the second part 132 of the first floating electrode plate 121, the third sub-capacitor is composed of the eighth part 138 of the third floating electrode plate 123 facing the fifth part 135 of the second floating electrode plate 122, and the fourth sub-capacitor is composed of the seventh part 137 of the third floating electrode plate 123 facing the second electrode plate 142. During the period when the second mover 112 reciprocates relative to the first mover 111 along the second direction Y, since the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the fourth sub-capacitor remain unchanged, and only the capacitance value of the third sub-capacitor changes, the change in capacitance between the first electrode 141 and any second electrode 142 is linearly related to the movement displacement of the second mover 112 relative to the base 101 along the second direction Y. Based on the capacitance value between the first electrode 141 and any second electrode 142, the position change of the second mover 112 relative to the base 101 can be obtained, and then the position of the second mover 112 is adjusted through the driving mechanism to compensate for the displacement caused by the shake, thereby improving the anti-shake accuracy of the anti-shake motor. Since the first electrode plate 141 and the second electrode plate 142 are both located on the circuit board 104, and the circuit board 104 is fixed on the base 101, the detection circuits of the first electrode plate 141 and the second electrode plate 142 do not need to be connected to any mover, and thus the detection circuits will not be affected by the movement of the first mover 111 or the second mover 112, which is beneficial to improving the accuracy of detecting the real-time displacement of the mover, improving the accuracy of the driving signal generated by the corresponding driving mechanism, and improving the anti-shake accuracy of the anti-shake motor.

[0068] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and in practical applications, various changes may be made to the embodiments in form and detail without departing from the spirit and scope of the present application. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present application, and therefore the scope of protection of the present application shall be subject to the scope defined in the claims.

Claims

1. An anti-shake motor, characterized in that: include: Base; a first mover, the first mover being suspended above the base, and being capable of reciprocating relative to the base along a third direction, wherein the third direction is perpendicular to the bottom surface of the base; a second mover, the second mover is suspended above the first mover, the second mover can reciprocate along a first direction and a second direction relative to the first mover, and the first mover drives the second mover to reciprocate along the third direction when the first mover reciprocates along the third direction relative to the base, the first direction intersects with the second direction and both are parallel to the bottom surface of the base; A circuit board, the circuit board is fixed on the base and surrounds the first mover, the circuit board includes a first electrode plate and two second electrode plates, the first electrode plate and the second electrode plate are connected to a detection circuit; A first floating electrode plate, the first floating electrode plate is located on the first mover, the first floating electrode plate comprises a first part and a second part electrically connected to each other, the first part is located on a side wall of the first mover and directly faces the first electrode plate to form a first sub-capacitor, and the second part is located on a bottom surface of the first mover; a second floating electrode plate, the second floating electrode plate is located on the second mover, the second floating electrode plate comprises a fourth portion and a fifth portion electrically connected to each other, the fourth portion and the fifth portion are both located on the bottom surface of the second mover, the fourth portion is directly opposite to the second portion to form a second sub-capacitor; two third floating pole plates, the third floating pole plates are located on the first mover, the third floating pole plates include a seventh portion and an eighth portion electrically connected to each other, the seventh portion is located on a side wall of the first mover, the eighth portion is located on a bottom surface of the first mover, the eighth portion of any third floating pole plate is directly opposite to the fifth portion to form a third sub-capacitor, and the seventh portions of two third floating pole plates are respectively directly opposite to two second pole plates to form two fourth sub-capacitors; The capacitance between the first electrode plate and any of the second electrode plates is composed of the first sub-capacitor, the second sub-capacitor, the third sub-capacitor and the fourth sub-capacitor connected in series. During the period when the second mover moves back and forth relative to the first mover along the second direction, the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the fourth sub-capacitor remain unchanged, while the capacitance value of the third sub-capacitor changes.

2. The anti-shake motor according to claim 1, characterized in that: A length of the first electrode plate along the third direction is greater than a length of the first portion along the third direction.

3. The anti-shake motor according to claim 1, characterized in that: The orthographic projection of the second part on the bottom surface of the base covers the orthographic projection of the fourth part on the bottom surface of the base; or, the orthographic projection of the fourth part on the bottom surface of the base covers the orthographic projection of the second part on the bottom surface of the base.

4. The anti-shake motor according to claim 1, characterized in that: The eighth portions of the two third floating plates are arranged along the second direction.

5. The anti-shake motor according to claim 1, characterized in that: The circuit board further comprises: two third plates, the third plates being connected to the detection circuit; The second floating pole plate further includes: a sixth portion electrically connected to the fourth portion and the fifth portion, the sixth portion being located on the bottom surface of the second mover; The anti-shake motor also includes: two fourth floating pole plates, the fourth floating pole plates are located on the first mover, the fourth floating pole plates include a ninth portion and a tenth portion electrically connected to each other, the ninth portion is located on the side wall of the first mover, the tenth portion is located on the bottom surface of the first mover, the tenth portion of any of the fourth floating pole plates is directly opposite to the sixth portion to form a fifth sub-capacitor, and the ninth portions of the two fourth floating pole plates are respectively directly opposite to the two third pole plates to form two sixth sub-capacitors; The capacitance between the first electrode plate and any of the third electrode plates is composed of the first sub-capacitor, the second sub-capacitor, the fifth sub-capacitor and the sixth sub-capacitor connected in series. During the period when the second mover moves back and forth relative to the first mover along the first direction, the capacitance values ​​of the first sub-capacitor, the second sub-capacitor and the sixth sub-capacitor remain unchanged, while the capacitance value of the fifth sub-capacitor changes.

6. The anti-shake motor according to claim 5, characterized in that: The tenth portions of the two fourth floating plates are arranged along the first direction.

7. The anti-shake motor according to claim 5, characterized in that: The second electrode plate is located on one side surface of the circuit board along the first direction, and the third electrode plate is located on one side surface of the circuit board along the second direction.

8. The anti-shake motor according to claim 1, characterized in that: The circuit board further comprises: two fourth plates, the fourth plates being connected to the detection circuit; The first floating electrode plate further comprises: a third portion electrically connected to the first portion and the second portion, the third portion being located on a side wall of the first mover, and the third portion being directly opposite to any of the fourth electrodes to form a seventh sub-capacitor; The capacitance between the first electrode plate and any of the fourth electrodes is composed of the first sub-capacitor and the seventh sub-capacitor connected in series. During the period when the first mover reciprocates relative to the base along the third direction, the capacitance value of the first sub-capacitor remains unchanged, while the capacitance value of the seventh sub-capacitor changes.

9. The anti-shake motor according to claim 8, characterized in that: Along the third direction, the width of the fourth electrode plate is less than or equal to the width of the third portion.

10. The anti-shake motor according to claim 8 or 9, characterized in that: Along the third direction, a distance between the fourth electrode plates is smaller than a width of the third portion.

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