Image stabilization motor

Abstract

Provided in the present application is an image stabilization motor, which can improve the accuracy of real-time mover position detection. In the image stabilization motor, a first mover is disposed above a base, and a second mover is disposed above the first mover. A circuit board comprises a first electrode plate and two second electrode plates. A first portion of a first floating electrode plate and the first electrode plate constitute a first sub-capacitor; a fourth portion of a second floating electrode plate and a second portion of the first floating electrode plate constitute a second sub-capacitor; an eighth portion of a third floating electrode plate and a fifth portion of the second floating electrode plate constitute a third sub-capacitor; and a seventh portion of the third floating electrode plate and the second electrode plates constitute a fourth sub-capacitor. A capacitor between the first electrode plate and either of the second electrode plates is formed by the first sub-capacitor, the second sub-capacitor, the third sub-capacitor, and the fourth sub-capacitor connected in series. When the second mover reciprocates relative to the first mover in a second direction, the capacitance values of the first sub-capacitor, the second sub-capacitor, and the fourth sub-capacitor remain unchanged, but the capacitance value of the third sub-capacitor varies.

Description

Anti-shake motor Cross-references

[0001] This disclosure claims priority to Chinese patent application No. 2025101800252, entitled "Shake Stabilization Motor", filed on February 18, 2025, which is incorporated herein by reference in its entirety. Technical Field

[0002] This application relates to the field of camera equipment technology, and in particular to a stabilization motor. Background Technology

[0003] To improve image quality during video recording, optical image stabilization (OIS) technology can be used to compensate for camera shake. This process typically involves using a gyroscope within the stabilization motor to detect camera movement, and then moving the lens in the opposite direction of the motor to compensate for image blur caused by camera shake.

[0004] To achieve fast and stable focusing, most camera modules in current video recording devices typically employ a closed-loop control method. During the focusing process, the real-time position of the actuator in the focusing motor is detected, and the drive current for the lens is adjusted based on the detected actuator position so that the actuator can quickly reach the accurate focusing position. The real-time position of the actuator is typically detected using a Hall effect sensor and a corresponding magnet for sensing.

[0005] However, there is currently a problem with inaccurate real-time position detection of the mover. Summary of the Invention

[0006] This application provides a shake-resistant motor, which at least helps to improve the accuracy of real-time position detection of the mover.

[0007] According to some embodiments of this application, one aspect of this application provides a shake-stabilizing motor, including: a base; a first mover, the first mover being suspended above the base and capable of reciprocating relative to the base along a third direction, the third direction being perpendicular to the bottom surface of the base; a second mover, the second mover being suspended above the first mover and capable of reciprocating relative to the first mover along a first direction and a second direction, the first mover reciprocating relative to the base along a third direction driving the second mover to reciprocate upward along the third direction, the first direction and the second direction intersecting and both being parallel to the bottom surface of the base; a circuit board, the circuit board being fixed on the base and surrounding the first mover, the circuit board including a first electrode plate and two second electrode plates, the first electrode plate and the second electrode plate being connected to a detection circuit; a first floating electrode plate, the first floating electrode plate being located on the first mover, the first floating electrode plate including a first part and a second part electrically connected to each other, the first part being located on the side wall of the first mover and facing the first electrode plate to form a first sub-capacitor, the second ... The first rotor has a bottom surface; a second floating plate located on the first rotor, comprising a fourth and a fifth part electrically connected to each other, both located on the bottom surface of the second rotor, the fourth part facing the second part to form a second sub-capacitor; two third floating plates located on the first rotor, comprising a seventh and an eighth part electrically connected to each other, the seventh part located on the side wall of the first rotor, the eighth part located on the bottom surface of the first rotor, the eighth part of any third floating plate facing the fifth part to form a third sub-capacitor, the seventh parts of the two third floating plates facing the two second plates respectively to form two fourth sub-capacitors; the capacitance between the first plate and any second plate is formed by the first, second, third, and fourth sub-capacitors connected in series, during the period when the second rotor reciprocates relative to the first rotor in a second direction, the capacitance values ​​of the first, second, and fourth sub-capacitors remain unchanged, while the capacitance value of the third sub-capacitor changes.

[0008] In some embodiments, the length of the first electrode plate along the third direction is greater than the length of the first portion along the third direction.

[0009] In some embodiments, the orthographic projection of the second part on the bottom surface of the base overlaps 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 overlaps the orthographic projection of the second part on the bottom surface of the base.

[0010] In some embodiments, the eighth portions of the two third floating plates are arranged along the second direction.

[0011] In some embodiments, the circuit board further includes: two third electrode plates connected to the detection circuit; the second floating electrode plate further includes: a sixth portion electrically connected to the fourth and fifth portions, the sixth portion being located on the bottom surface of the second mover; the anti-shake motor further includes: two fourth floating electrode plates located on the first mover, the fourth floating electrode plates including a ninth portion and a tenth portion electrically connected to each other, the ninth portion being located on the side wall of the first mover, the tenth portion being located on the bottom surface of the first mover, the tenth portion of any fourth floating electrode plate being directly opposite the sixth portion to form a fifth sub-capacitor, the ninth portions of the two fourth floating electrode plates being directly opposite the two third electrode plates to form two sixth sub-capacitors; the capacitance between the first electrode plate and any third electrode plate is formed by 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 reciprocates 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.

[0012] In some embodiments, the tenth portions of the two fourth floating plates are arranged along a first direction.

[0013] In some embodiments, 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.

[0014] In some embodiments, the circuit board further includes: two fourth plates connected to the detection circuit; the first floating plate further includes: a third portion electrically connected to the first portion and the second portion, the third portion being located on the side wall of the first mover, the third portion being directly opposite any of the fourth plates to form a seventh sub-capacitor; the capacitance between the first plate and any of the fourth plates is formed by the first sub-capacitor and the seventh sub-capacitor connected in series, during which the first mover reciprocates relative to the base in a third direction, the capacitance value of the first sub-capacitor remains unchanged, while the capacitance value of the seventh sub-capacitor changes.

[0015] In some embodiments, the width of the fourth electrode plate is less than or equal to the width of the third portion along the third direction.

[0016] In some embodiments, the spacing between the fourth plates is less than the width of the third portion as it moves upward along the third direction.

[0017] The technical solution provided in this application has at least the following advantages:

[0018] In the anti-shake motor provided in this application embodiment, the first electrode plate and the second electrode plate are used to connect to the detection circuit. 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 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 and the fifth part of the second floating electrode plate facing each other. The fourth sub-capacitor is composed of the seventh part of the third floating electrode plate and the second electrode plate facing each other. During the reciprocating motion of the second mover relative to the first mover along the second direction, since the capacitance values ​​of the first, second, and fourth sub-capacitors remain unchanged, and only the capacitance value of the third sub-capacitor changes, the change in capacitance between the first plate and any second plate is linearly related to the displacement of the second mover relative to the base along the second direction. Based on the capacitance value between the first plate and any second plate, the position change of the second mover relative to the base can be obtained. Then, the position of the second mover can be adjusted by the drive mechanism to compensate for the displacement caused by shaking, thus improving the anti-shake accuracy of the anti-shake motor. Since both the first and second plates are located on a circuit board fixed to the base, the detection circuits of the first and second plates do not need to be connected to any mover. Therefore, the detection circuits are not affected by the movement of the first or second mover, which helps improve the accuracy of detecting the real-time position of the mover. Consequently, the accuracy of the drive signal generated by the drive mechanism is improved, and the anti-shake accuracy of the anti-shake motor is enhanced. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrative descriptions do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this disclosure or the conventional technology, the drawings required in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 is an exploded view of the anti-shake motor provided in an embodiment of this application from a single perspective.

[0021] Figure 2 is an exploded view of the anti-shake motor provided in the embodiment of this application from another perspective;

[0022] Figure 3 is a top view of each electrode plate relative to the bottom surface of the base provided in the embodiment of this application;

[0023] Figure 4 is a schematic diagram of the positional structure of each electrode plate provided in the embodiment of this application;

[0024] Figure 5 is a schematic diagram of two orthographic projections of the eighth part and the fifth part on the bottom surface of the base provided in the embodiments of this application. Detailed Implementation

[0025] As can be seen from the background technology, there is currently a problem with inaccurate real-time position detection of the mover.

[0026] This application provides a shake-resistant motor, which at least helps to improve the accuracy of real-time position detection of the mover.

[0027] In the description of the embodiments of this application, the technical terms "first", "second", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0028] In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0031] In the description of the embodiments of this application, technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0032] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0033] In the description of the embodiments of this application, when a component "includes" another component, other components are not excluded unless otherwise stated, and other components may be further included.

[0034] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "component" is also intended to include the plural form unless the context clearly indicates otherwise.

[0035] The embodiments of this application will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0036] Figure 1 is an exploded view of the anti-shake motor provided in this embodiment from one perspective; Figure 2 is an exploded view of the anti-shake motor provided in this embodiment from another perspective; Figure 3 is a top view of each electrode plate provided in this embodiment relative to the bottom surface of the base; Figure 4 is a schematic diagram of the position structure of each electrode plate provided in this embodiment. In Figures 1 and 2, the positions of the first electrode plate, second electrode plate, third electrode plate, and fourth electrode plate are indicated by dashed boxes; in Figure 4, for ease of illustration, only the surface of the circuit board on which the first and third electrode plates are disposed, and the surface on which the second and third electrode plates are disposed, are shown; the other two surfaces are not shown.

[0037] Referring to Figures 1 to 4, the anti-shake motor provided in this application embodiment includes: a base 101, a first mover 111, a second mover 112, a circuit board 104, a first floating electrode 121, a second floating electrode 122, and a third floating electrode 123.

[0038] The first moving part 111 is suspended above the base 101. The first moving part 111 can reciprocate relative to the base 101 along the third direction Z, which is perpendicular to the bottom surface of the base 101.

[0039] The second mover 112 is suspended above the first mover 111. The second mover 112 can reciprocate relative to the first mover 111 along the first direction X and the second direction Y. When the first mover 111 reciprocates relative to the base 101 along the third direction Z, it drives the second mover 112 to reciprocate along the third direction Z upward. The first direction X and the second direction Y intersect and are both parallel to the bottom surface of the base 101.

[0040] 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 plates 142 are connected to the detection circuit (not shown in the figure).

[0041] The first floating electrode 121 is located on the first mover 111. The first floating electrode 121 includes a first part 131 and a second part 132 that are electrically connected to each other. The first part 131 is located on the side wall of the first mover 111 and is directly opposite the first electrode 141 to form a first sub-capacitor. The second part 132 is located on the bottom surface of the first mover 111.

[0042] The second floating plate 122 is located on the second mover 112. The second floating plate 122 includes a fourth part 134 and a fifth part 135 that are electrically connected to each other. Both the fourth part 134 and the fifth part 135 are located on the bottom surface of the second mover 112. The fourth part 134 is directly opposite the second part 132 to form a second sub-capacitor.

[0043] The number of third floating plates 123 is at least two. The third floating plates 123 are located on the first mover 111. The third floating plates 123 include a seventh part 137 and an eighth part 138 that are electrically connected to each other. The seventh part 137 is located on the side wall of the first mover 111, and the eighth part 138 is located on the bottom surface of the first mover 111. The eighth part 138 of any third floating plate 123 is directly opposite to the fifth part 135 of the second floating plate 122 to form a third sub-capacitor. The seventh parts 137 of the two third floating plates 123 are directly opposite to the two second plates 142 to form two fourth sub-capacitors.

[0044] The capacitance between the first electrode plate 141 and any of the second electrode plates 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 reciprocates 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.

[0045] In the image stabilization motor provided in this application embodiment, the second mover 112 is used to place the lens, and the first mover 111 moves relative to the base 101 along a third direction Y to drive the second mover to move along a third direction Y, thereby driving the lens to move along the optical axis to achieve lens focusing; the second mover 112 moves relative to the first mover 111 along a first direction X or a second direction Y to achieve image stabilization of the lens in a dual-axis direction perpendicular to the optical axis. The first electrode 141 and the second electrode 142 are used to connect to the detection circuit. The capacitance between the first electrode 141 and any of the second electrode 142 is formed by 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 formed by the first electrode 141 and the first part 131 of the first floating electrode 121 facing each other. The second sub-capacitor is formed by the fourth part 134 of the second floating electrode 122 facing the second part 132 of the first floating electrode 121. The third sub-capacitor is formed by the fifth part 135 of the second floating electrode 122 facing the eighth part 138 of the third floating electrode 123. The fourth sub-capacitor is formed by the seventh part 137 of the third floating electrode 123 facing the second electrode 142. During the reciprocating motion of the second mover 112 relative to the first mover 111 along the second direction Y, 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 relative to the base 101 along the third direction Y, there is no relative displacement between the second mover 112 and the base 101 in either 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 reciprocating motion of the second mover 112 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 value between the first electrode plate 141 and any second electrode plate 142 is linearly related to the 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 plate 141 and any second electrode plate 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 can be adjusted by the drive mechanism to compensate for the displacement caused by shaking, thereby improving the anti-shake accuracy of the anti-shake motor. Since both the first electrode plate 141 and the second electrode plate 142 are located on the circuit board 104, which is fixed to 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 moving part. As a result, the detection circuits will not be affected by the movement of the first moving part 111 or the second moving part 112, which helps to improve the accuracy of detecting the real-time displacement of the moving part. Consequently, the accuracy of the drive signal generated by the corresponding drive mechanism is improved, and the anti-shake accuracy of the anti-shake motor is improved.

[0046] Referring to Figures 1 and 2, the anti-shake motor may also include an upper cover 102 and a pressure plate 103. The upper cover 102 and the base 101 form a receiving cavity, in which the first mover 111, the second mover 112 and the circuit board 104 are all housed. The pressure plate 103 can play a protective role to prevent damage or contamination of the internal components of the anti-shake motor.

[0047] The anti-shake motor also includes multiple balls 106. A ball 106 is provided between the first mover 111 and the base 101 to enable the first mover 111 to move relative to the base 101 in a third direction Z. A ball 106 is provided 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 in a first direction X or a second direction Y.

[0048] The anti-shake motor also contains multiple magnets 105, and a corresponding drive coil (not shown in the figure) is provided in the circuit board 104. The magnets 105 and the drive coil constitute a drive mechanism. The magnets 105 fixed on the side wall of the first mover 111 and the corresponding drive coil are used to drive the first mover 111 to move relative to the base 101 in the third direction Z. The drive coils corresponding to the magnets 105 fixed on the side wall of the second mover 112 in the first direction X and the side wall fixed in the second direction Y are used to drive the second mover 112 to move relative to the first mover 111 in the first direction X or the second direction Y.

[0049] The circuit board 104 may further include: two third electrode plates 143 connected to the detection circuit; the second floating electrode plate 122 may further include: a sixth part 136 electrically connected to the fourth part 134 and the fifth part 135, the sixth part 136 being located on the bottom surface of the second mover 112; the anti-shake motor may further include: two fourth floating electrode plates 124 located on the first mover 111, the fourth floating electrode plate 124 including a ninth part 139 and a tenth part 130 electrically connected to each other, the ninth part 139 being located on the side wall of the first mover 111, the tenth part 130 being located on the bottom surface of the first mover 111, the tenth part 130 of any fourth floating electrode plate 124 being directly opposite the sixth part 136 of the second floating electrode plate 122 to form a fifth sub-capacitor, the ninth parts 139 of the two fourth floating electrode plates 124 being directly opposite the two third electrode plates 143 to form two sixth sub-capacitors.

[0050] 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.

[0051] During the reciprocating motion of the second mover 112 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 relative to the base 101 along the third direction Y, no relative displacement will occur between the second mover 112 and the base 101 in either 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 value between the first electrode plate 141 and any third electrode plate 143 is linearly related to the 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 can be adjusted by the drive mechanism to compensate for the displacement caused by shaking, thereby improving the anti-shake accuracy of the anti-shake motor.

[0052] The circuit board 104 may further include: two fourth electrode plates 144, which are connected to the detection circuit; the first floating electrode plate 121 may further include: a third part 133 electrically connected to the first part 131 and the second part 132, the third part 133 being located on the side wall of the first mover 111, and the third part 133 being directly opposite any of the fourth electrode plates 144 to form a seventh sub-capacitor. The capacitance between the first electrode plate 141 and any of the fourth electrode plates 144 is formed by the first sub-capacitor and the seventh sub-capacitor connected in series. During the reciprocating movement of the first mover 111 relative to the base 101 along the third direction Z, the capacitance value of the first sub-capacitor remains unchanged, while the capacitance value of the seventh sub-capacitor changes. Thus, the change in capacitance between the first electrode plate 141 and any fourth electrode plate 144 is linearly related to the displacement of the first mover 111 relative to the base 101 along the third direction Z. Based on the capacitance between the first electrode plate 141 and any fourth electrode plate 144, the position change of the first mover 111 relative to the base 101 can be obtained. Then, the position of the first mover 111 can be adjusted by the drive mechanism to compensate for the displacement caused by shaking, thereby improving the anti-shake accuracy of the anti-shake motor.

[0053] 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 available for charge storage between the first electrode plate 141 and the first portion 131 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 one side surface of the circuit board 104 and the orthographic projection of the first portion 131 on the same side surface of the circuit board 104. Since the first mover 111 can only move relative to the base 101 along the third direction Z, the greater length of the first electrode plate 141 along the third direction Y compared to the first portion 131 along the third direction Y helps to ensure that during the movement of the first mover 111 relative to the base 101 along the third direction Z, the effective area of ​​the first sub-capacitor does not change due to the first portion 131 extending beyond the first electrode plate 141, thereby ensuring that the capacitance value of the first sub-capacitor does not change.

[0054] It should be noted that, in this embodiment, the shape of both the first electrode plate 141 and the first portion 131 is rectangular, which does not constitute a limitation on the shape of the first electrode plate 141 and the first portion 131. In other embodiments, the shape of the first electrode plate and the shape of the first portion can also be circular, triangular, trapezoidal, or polygonal, as long as the effective area between the first electrode plate and the first portion remains unchanged when the first mover moves relative to the base along a third direction, so that the capacitance value of the first sub-capacitor does not change.

[0055] In this embodiment, the orthographic projection of the second portion 132 onto the bottom surface of the base 101 overlaps the orthographic projection of the fourth portion 134 onto the bottom surface of the base 101. In other embodiments, the orthographic projection of the fourth portion onto the bottom surface of the base overlaps the orthographic projection of the second portion onto the bottom surface of the base.

[0056] The actual area available for charge storage in the second part 132 and the fourth part 134 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 relative to the first mover 111 along the first direction X or the second direction Y, 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 when 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 ensuring that the capacitance value of the second sub-capacitor does not change.

[0057] It should be noted that, in this embodiment, the fact that both the second part 132 and the fourth part 134 are triangular does not constitute a limitation on the shape of the first electrode plate 141 or 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, elliptical, trapezoidal, or polygonal, as long as the effective area between the second part and the fourth part 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.

[0058] 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 can be greater than 0° and less than 90°, such as 30°, 45° or 60°.

[0059] Figure 5 shows two orthographic projections of the eighth and fifth parts on the bottom surface of the base according to an embodiment of this application. The fifth part is semi-transparent to facilitate the display of the overlapping area between the eighth and fifth parts.

[0060] The actual area available for charge storage between the eighth part 138 and the fifth part 135 is the effective area of ​​the third sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the eighth part 138 on the bottom surface of the base 101 and the orthographic projection of the fifth part 135 on the base of the base 101. Referring to Figure 5, the eighth parts 138 of the two third floating plates 123 are arranged along the second direction Y. When the second mover 112 moves relative to the first mover 111 along the second direction Y, the effective area between the fifth part 135 and the eighth part 138 of any of the third floating plates 123 changes, and the capacitance value of the corresponding third sub-capacitor changes.

[0061] Referring to Figure 5(a), the length of the fifth portion 135 along the first direction X can be greater than the length of the eighth portion 138 along the first direction X; or, referring to Figure 5(b), the length of the fifth portion 135 along the first direction X can 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 can also be equal to the length of the eighth portion along the first direction. Referring to Figure 5(a), the length of the fifth portion 135 along the second direction Y can be greater than the distance between the eighth portions 138 of the two third floating plates; or, referring to Figure 5(b), the length of the fifth portion 135 along the second direction Y can be equal to the distance between the eighth portions 138 of the two third floating plates; or, the length of the fifth portion along the second direction can also be less than the distance between the eighth portions of the two third floating plates.

[0062] It should be noted that the size and shape of the fifth part 135 and the eighth part 138 can be adjusted according to the actual situation so that during the movement of the second mover 112 relative to the first mover 111 along the second direction Y, the effective area between the fifth part 135 and the eighth part 138 of any third floating plate 123 changes, so that the capacitance value of the third sub-capacitor changes.

[0063] 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 one side of the circuit board 104 and the orthographic projection of the seventh portion 137 on the same side 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 the actual situation, 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 be referred to the first electrode 141 and the first portion 131 mentioned above, and will not be repeated here.

[0064] 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 can be greater than 0° and less than 90°, such as 30°, 45° or 60°.

[0065] The actual area available for charge storage between the tenth part 130 and the sixth part 136 is the effective area of ​​the fifth sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the tenth part 130 onto the bottom surface of the base 101 and the orthographic projection of the sixth part 136 onto the bottom surface of the base 101. The shape and size of the sixth part 136 and the tenth part 130 can be adjusted according to actual conditions, as long as the effective area between the sixth part 136 and the tenth part 130 of any fourth floating plate 124 changes during the movement of the second mover 112 relative to the first mover 111 along the first direction X, so as to change the capacitance value of the fifth sub-capacitor. The shape and size of the sixth part 136 and the tenth part 130 can be referred to the aforementioned fifth part 135 and eighth part 138, and will not be repeated here.

[0066] The actual area available for charge storage between the ninth part 139 and the third electrode plate 143 is the effective area of ​​the sixth sub-capacitor, that is, the overlapping area of ​​the orthographic projection of the ninth part 139 on one side of the circuit board 104 and the orthographic projection of the third electrode plate 143 on the same side of the circuit board 104. The shape and size of the third electrode plate 143 and the ninth part 139 can be adjusted according to the actual situation, as long as the effective area between the third electrode plate 143 and the ninth part 139 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 sixth sub-capacitor does not change. The specific settings can be referred to the first electrode plate 141 and the first part 131 mentioned above, and will not be repeated here.

[0067] The actual area available for charge storage between the third part 133 and the fourth electrode plate 144 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 one side of the circuit board 104 and the orthographic projection of the third part 133 on the same side of the circuit board 104. The shape and size of the third part 133 and the fourth electrode plate 144 can be adjusted according to the actual situation, as long as the effective area between the third part 133 and the fourth electrode plate 144 changes when the first mover 111 moves relative to the base 101 along the third direction Z, so as to change the capacitance value of the seventh sub-capacitor. For specific settings, please refer to the aforementioned fifth part 135 and eighth part 138.

[0068] In some embodiments, along the third direction Z, the width of the fourth electrode 144 is less than or equal to the width of the third portion 133. This ensures that the third portion 133 maintains an effective area with either of the fourth electrode 144 during movement, thereby avoiding abrupt changes in capacitance detection, improving the accuracy of position detection, and enhancing the anti-shake precision of the anti-shake motor.

[0069] In some embodiments, along the third direction Z, the spacing between the fourth plates 144 is less than the width of the third portion 133. This avoids the situation where neither of the four fourth plates 144 receives capacitance when the third portion 133 moves between them, thus preventing abrupt changes in capacitance detection and improving the accuracy of position detection and the anti-shake precision of the anti-shake motor.

[0070] In this embodiment, the second electrode 142 and the third electrode 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 may be located on one side surface of the circuit board along the first direction, and the third electrode may be located on one side surface of the circuit board along the second direction. Correspondingly, the position of the seventh portion 137 of the third floating electrode 123 that forms the fourth sub-capacitor with the second electrode 142 can be adjusted according to the position of the second electrode 142, and the position of the ninth portion 139 of the fourth floating electrode 124 that forms the sixth sub-capacitor with the third electrode 143 can be adjusted according to the position of the third electrode 143.

[0071] In some embodiments, during the movement of the second mover 112 relative to the first mover 111 along the first direction X, the capacitance value of the third sub-capacitor may remain unchanged. Thus, the movement of the second mover 112 relative to the first mover 111 along the first direction X is linearly related only to the change in the fifth sub-capacitor. In some embodiments, during the movement of the second mover 112 relative to the first mover 111 along the first direction X, the capacitance value of the third sub-capacitor may change. Thus, the movement of the second mover 112 relative to the first mover 111 along the first direction X is linearly related to the changes in both the third and fifth sub-capacitors. By testing the combined capacitance values ​​of the second mover 112 relative to the first mover 111 in multiple motion states, the relative positional relationship between the second mover 112 and the first mover 111 can be deduced. Similarly, during the movement of the second mover 112 relative to the first mover 111 along the second direction Y, the value of the fifth capacitor may remain unchanged or change.

[0072] It should be noted that, in the accompanying drawings provided in this embodiment, the shape and position of the electrical connection traces between the first part 131, the second part 132, and the third part 133 corresponding to the first floating electrode 121 are merely examples and do not constitute a limitation on the shape and position of the electrical connection traces between the first part 131, the second part 132, and the third part 133. The shape and position of the electrical connection traces between the first part 131, the second part 132, and the third part 133 can be adjusted according to actual conditions. Similarly, the shape and position of the electrical connection traces between the fourth part 134, the fifth part 135, and the sixth part 136 corresponding to the second floating electrode 122 can be adjusted according to actual conditions; the shape and position of the electrical connection traces between the seventh part 137 and the eighth part 138 corresponding to the third floating electrode 123 can be adjusted according to actual conditions; and the shape and position of the electrical connection traces between the ninth part 139 and the tenth part 130 corresponding to the fourth floating electrode 124 can be adjusted according to actual conditions.

[0073] In the anti-shake motor provided in this embodiment, 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 of the second electrode plates 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 formed by 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 formed by 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 formed by the eighth part 138 of the third floating electrode plate 123 facing the fifth part 135 of the second floating electrode plate 122. The fourth sub-capacitor is formed by the seventh part 137 of the third floating electrode plate 123 facing the second electrode plate 142. During the reciprocating motion of the second mover 112 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 value between the first electrode plate 141 and any second electrode plate 142 is linearly related to the 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 plate 141 and any second electrode plate 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 can be adjusted by the drive mechanism to compensate for the displacement caused by shaking, thereby improving the anti-shake accuracy of the anti-shake motor. Since both the first electrode plate 141 and the second electrode plate 142 are located on the circuit board 104, which is fixed to 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 moving part. As a result, the detection circuits will not be affected by the movement of the first moving part 111 or the second moving part 112, which helps to improve the accuracy of detecting the real-time displacement of the moving part. Consequently, the accuracy of the drive signal generated by the corresponding drive mechanism is improved, and the anti-shake accuracy of the anti-shake motor is improved.

[0074] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application, and in practical applications, various changes in form and detail can be made without departing from the spirit and scope of this application. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this application; therefore, the scope of protection of this application should be determined by the scope defined in the claims.

Claims

1. A shake-stabilizing motor, comprising: Base; The first moving part is suspended above the base and can reciprocate relative to the base along a third direction, which is perpendicular to the bottom surface of the base. The second moving part is suspended above the first moving part. The second moving part can reciprocate relative to the first moving part along a first direction and a second direction. When the first moving part reciprocates relative to the base along a third direction, it drives the second moving part to reciprocate upward along the third direction. The first direction and the second direction intersect and are both parallel to the bottom surface of the base. A circuit board, which is fixed to the base and surrounds the first moving part, includes a first electrode plate and two second electrode plates, which are connected to a detection circuit. A first floating electrode plate is located on the first moving element. The first floating electrode plate includes a first part and a second part that are electrically connected to each other. The first part is located on the side wall of the first moving element and is directly opposite the first electrode plate to form a first sub-capacitor. The second part is located on the bottom surface of the first moving element. The second floating plate is located on the second moving part. The second floating plate includes a fourth part and a fifth part that are electrically connected to each other. The fourth part and the fifth part are both located on the bottom surface of the second moving part. The fourth part and the second part are directly opposite each other to form a second sub-capacitor. Two third floating plates are located on the first moving element. Each third floating plate includes a seventh part and an eighth part that are electrically connected to each other. The seventh part is located on the side wall of the first moving element, and the eighth part is located on the bottom surface of the first moving element. The eighth part of any third floating plate is opposite to the fifth part to form a third sub-capacitor. The seventh parts of the two third floating plates are opposite to the two second plates to form two fourth sub-capacitors. The capacitance between the first electrode plate and any of the second electrodes plate is formed by 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 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.

2. The anti-shake motor according to claim 1, wherein, The length of the first electrode plate along the third direction is greater than the length of the first portion along the third direction.

3. The anti-shake motor according to claim 1, wherein, The orthographic projection of the second part on the bottom surface of the base overlaps the orthographic projection of the fourth part on the bottom surface of the base; Alternatively, the orthographic projection of the fourth part onto the bottom surface of the base overlaps the orthographic projection of the second part onto the bottom surface of the base.

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

5. The anti-shake motor according to claim 1, wherein, The circuit board further includes two third plates, which are connected to the detection circuit. The second floating electrode plate further includes a sixth part electrically connected to the fourth part and the fifth part, the sixth part being located on the bottom surface of the second mover; The anti-shake motor also includes: Two fourth floating plates are located on the first moving element. Each fourth floating plate includes a ninth part and a tenth part that are electrically connected to each other. The ninth part is located on the side wall of the first moving element, and the tenth part is located on the bottom surface of the first moving element. The tenth part of any fourth floating plate is opposite to the sixth part to form a fifth sub-capacitor. The ninth parts of the two fourth floating plates are opposite to the two third plates to form two sixth sub-capacitors. The capacitance between the first electrode plate and any of the third electrodes plate is formed by 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 reciprocates 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, wherein, The tenth portions of the two fourth floating plates are arranged along the first direction.

7. The anti-shake motor according to claim 5, wherein, 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, wherein, The circuit board further includes: two fourth electrode plates, which are connected to the detection circuit; The first floating electrode further includes: a third part electrically connected to the first part and the second part, the third part being located on the side wall of the first mover, the third part being directly opposite any of the fourth electrode to form a seventh sub-capacitor; The capacitance between the first electrode plate and any of the fourth electrode plates is formed by 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, wherein, Along the third part upwards, the width of the fourth electrode plate is less than or equal to the width of the third part.

10. The anti-shake motor according to claim 8 or 9, wherein, Along the third part upwards, the spacing between the fourth plates is less than the width of the third part.

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