Anti-shake motor

Abstract

The present application provides an anti-shake motor, which can improve the accuracy of real-time position detection of the mover. In the anti-shake motor, a first mover is arranged above a base, and a second mover is arranged above the first mover. The circuit board includes a first electrode plate and two second electrode plates; a first part of the first floating electrode plate and the first electrode plate form a first sub-capacitor; a fourth part of the second floating electrode plate and a second part of the first floating electrode plate form a second sub-capacitor; an eighth part of the third floating electrode plate and a fifth part of the second floating electrode plate form a third sub-capacitor, and a seventh part of the third floating electrode plate and the second electrode plate form a fourth sub-capacitor; the capacitance between the first electrode plate and any one of the second electrode plates is formed by the series connection of the first sub-capacitor, the second sub-capacitor, the third sub-capacitor and the fourth sub-capacitor. During the reciprocating movement of the second mover 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, and the capacitance value of the third sub-capacitor changes.

Description

Technical Field

[0001] This application relates to the technical field of imaging devices, and particularly to an anti-shake motor. Background Art

[0002] In order to improve the picture quality of an imaging device during shooting, optical image stabilization technology can be adopted in the imaging device to perform motion compensation for the shake of the imaging device itself. When performing motion compensation, the gyroscope in the anti-shake motor of the imaging device is usually used to detect jitter, and then the lens is moved in the opposite direction by the anti-shake motor, so as to compensate for the image blurring phenomenon caused by the shake of the imaging device.

[0003] In order to achieve focusing quickly and stably, currently, most camera modules in imaging devices usually adopt a closed-loop control method. During the focusing process, the real-time position of the mover in the focusing motor is detected, and the driving current for driving the lens is adjusted according to the detected position of the mover, so that the mover can quickly reach the accurate focusing position. When detecting the real-time position of the mover, a Hall sensor and a corresponding magnet for sensing are usually used for detection.

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

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

[0006] According to some embodiments of the present application, on the one hand, an anti-vibration motor provided by an embodiment of the present application includes: a base; a first mover, the first mover is suspended above the base, and the first mover can reciprocate relative to the base along a third direction, the third direction is perpendicular to the bottom surface of the base; a second mover, the second mover is suspended above the first mover, and 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 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, and the first electrode plate and the second electrode plates are connected to a detection circuit; a first floating electrode plate, the first floating electrode plate is located on the first mover, and 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 mover and faces the first electrode plate to form a first sub-capacitor, and the second part is located on the bottom surface of the first mover; a second floating electrode plate, the second floating electrode plate is located on the second mover, and the second floating electrode plate includes a fourth part and a fifth part that are electrically connected to each other. Both the fourth part and the fifth part are located on the bottom surface of the second mover, and the fourth part faces the second part to form a second sub-capacitor; two third floating electrode plates, the third floating electrode plates are located on the first mover, and the third floating electrode plates include 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 mover, and the eighth part is located on the bottom surface of the first mover. The eighth part of any one of the third floating electrode plates faces the fifth part to form a third sub-capacitor, and the seventh parts of the two third floating electrode plates face the two second electrode plates respectively to form two fourth sub-capacitors; the capacitance between the first electrode plate and any one 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 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, and the capacitance value of the third sub-capacitor changes.

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

[0008] In some embodiments, 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.

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

[0010] In some embodiments, the circuit board further includes: two third electrodes, and the third electrodes are connected to the detection circuit; the second floating electrode further includes: a sixth portion electrically connected to the fourth portion and the fifth portion, and the sixth portion is located on the bottom surface of the second mover; the anti-shake motor further includes: two fourth floating electrodes, and the fourth floating electrodes are located on the first mover. The fourth floating electrode includes a ninth portion and a tenth portion that are electrically connected to each other. The ninth portion is located on the side wall of the first mover, and the tenth portion is located on the bottom surface of the first mover. The tenth portion of any one of the fourth floating electrodes faces the sixth portion to form a fifth sub-capacitor, and the ninth portions of the two fourth floating electrodes face the two third electrodes respectively to form two sixth sub-capacitors; the capacitance between the first electrode and any one of the third electrodes 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 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, and the capacitance value of the fifth sub-capacitor changes.

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

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

[0013] In some embodiments, the circuit board further includes: two fourth electrodes, and the fourth electrodes are connected to the detection circuit; the first floating electrode further includes: a third portion electrically connected to the first portion and the second portion, and the third portion is located on the side wall of the first mover. The third portion faces any one of the fourth electrodes to form a seventh sub-capacitor; the capacitance between the first electrode and any one 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, and the capacitance value of the seventh sub-capacitor changes.

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

[0015] In some embodiments, along the third direction, the distance between the fourth electrodes is less than the width of the third portion.

[0016] The technical solutions provided by the embodiments of the present application have at least the following advantages:

[0017] In the anti-shake motor provided by the embodiment of the present application, the first electrode plate and the second electrode plate are used to be connected to the detection circuit. The capacitance between the first electrode plate and any second electrode plate is composed of a first sub-capacitance, a second sub-capacitance, a third sub-capacitance, and a fourth sub-capacitance connected in series. The first sub-capacitance is formed by the first electrode plate facing the first part of the first floating electrode plate, the second sub-capacitance is formed by the fourth part of the second floating electrode plate facing the second part of the first floating electrode plate, the third sub-capacitance is formed by the eighth part of the third floating electrode plate facing the fifth part of the second floating electrode plate, and the fourth sub-capacitance is formed by the seventh part of the third floating electrode plate facing the second electrode plate. During the reciprocating movement of the second mover relative to the first mover in the second direction, since the capacitance values of the first sub-capacitance, the second sub-capacitance, and the fourth sub-capacitance remain unchanged, and only the capacitance value of the third sub-capacitance changes, the change in the 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 can be adjusted through the driving mechanism to compensate for the displacement caused by jitter, thereby improving the anti-shake accuracy of the anti-shake motor. Since both the first electrode plate and the second electrode plate are located on the circuit board, and the circuit board is fixed to the base, the detection circuit of the first electrode plate and the second electrode plate does not need to be connected to any mover, so the detection circuit will not be affected by the movement of the first mover or the second mover, which is beneficial to improving the accuracy of detecting the real-time position of the mover, and correspondingly, the accuracy of the driving signal generated by the driving mechanism is improved, and the anti-shake accuracy of the anti-shake motor is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the figures in the drawings do not constitute a proportional limitation; in order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following-described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is an exploded view of the anti-shake motor provided by the embodiment of the present application from one perspective;

[0020] Figure 2 is an exploded view of the anti-shake motor provided by the embodiment of the present application from another perspective;

[0021] Figure 3 is a top view of each electrode plate provided by the embodiment of the present application relative to the bottom surface of the base;

[0022] Figure 4Schematic diagram of the position structure corresponding to each electrode plate provided by the embodiment of the present application;

[0023] Figure 5 Two orthographic projection diagrams of the eighth part and the fifth part provided by the embodiment of the present application on the bottom surface of the base. Detailed implementation manners

[0024] As can be seen from the background art, there is currently a problem that the real-time position detection of the mover is inaccurate.

[0025] The embodiment of the present application provides an anti-shake motor, which at least helps to improve the accuracy of real-time position detection of the mover.

[0026] In the description of the embodiment 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 quantity, specific order or primary-secondary relationship of the indicated technical features.

[0027] In the description of the embodiment of the present application, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0028] Referring to "embodiment" herein means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiment of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: there is A, there is both A and B, and there is B. In addition, the character " / " in this article generally means that the associated objects before and after are in an "or" relationship.

[0030] In the description of the embodiment of the present 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", "circumferential", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the embodiment of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiment of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. 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 specific circumstances.

[0032] 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 further be included.

[0033] The terms used in the description of various embodiments herein are only for describing specific embodiments and are not intended to be limiting. As used in the description of the various embodiments and the appended claims, "component" is also intended to include the plural form unless the context clearly indicates otherwise.

[0034] The following will elaborate on the embodiments of the present application in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present application, many technical details are presented for 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 solutions claimed in the present application can still be implemented.

[0035] Figure 1 It is an exploded view of the anti-shake motor provided in the embodiment of the present application from one perspective; Figure 2 It is an exploded view of the anti-shake motor provided in the embodiment of the present application from another perspective; Figure 3 It is a top view of each electrode plate relative to the bottom surface of the base provided in the embodiment of the present application; Figure 4 It is a schematic diagram of the position structure corresponding to each electrode plate provided in the embodiment of the present application. Among them, in Figure 1 and Figure 2 , the positions corresponding to the first electrode plate, the second electrode plate, the third electrode plate, and the fourth electrode plate are all represented by dashed frames; in Figure 4 , for the convenience of display, only one side surface of the circuit board provided with the first electrode plate and the third electrode plate and one side surface provided with the second electrode plate and the third electrode plate are shown, and the other two side surfaces are not shown.

[0036] Referring 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 electrode plate 121, a second floating electrode plate 122, and a third floating electrode plate 123.

[0037] The first mover 111 is suspended above the base 101. The first mover 111 can reciprocate relative to the base 101 along the third direction Z, and the third direction Z is perpendicular to the bottom surface of the base 101.

[0038] 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. The first direction X intersects with the second direction Y and both are parallel to the bottom surface of the base 101.

[0039] 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 a detection circuit (not shown in the figure).

[0040] The first floating electrode plate 121 is located on the first mover 111. The first floating electrode plate 121 includes a first part 131 and a second part 132 which are electrically connected to each other. The first part 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, and the second part 132 is located on the bottom surface of the first mover 111.

[0041] The second floating electrode plate 122 is located on the second mover 112. The second floating electrode plate 122 includes a fourth part 134 and a fifth part 135 which 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 faces the second part 132 to form a second sub-capacitor.

[0042] The number of the third floating electrode plates 123 is at least two. The third floating electrode plates 123 are located on the first mover 111. The third floating electrode plates 123 include a seventh part 137 and an eighth part 138 which 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 one of the third floating electrode plates 123 faces the fifth part 135 of the second floating electrode plate 122 to form a third sub-capacitor. The seventh parts 137 of the two third floating electrode plates 123 face the two second electrode plates 142 respectively to form two fourth sub-capacitors.

[0043] The capacitance between the first electrode plate 141 and any one of the second electrode plates 142 is composed of the first sub-capacitor, the second sub-capacitor, the third sub-capacitor and the fourth sub-capacitor 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, and the capacitance value of the third sub-capacitor changes.

[0044] In the anti-shake motor provided by the embodiment of the present application, the lens is placed on the second mover 112. The first mover 111 moves relative to the base 101 along the third direction Y to drive the second mover to move along the third direction Y, and further drive the lens to move along the optical axis direction to achieve the focusing of the lens. The second mover 112 moves relative to the first mover 111 along the first direction X or the second direction Y to achieve the anti-shake in the biaxial direction perpendicular to the optical axis direction of the lens. 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-capacitance, a second sub-capacitance, a third sub-capacitance, and a fourth sub-capacitance connected in series. The first sub-capacitance is formed by the first part 131 of the first electrode plate 141 facing the first floating electrode plate 121. The second sub-capacitance 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-capacitance is formed by the fifth part 135 of the second floating electrode plate 122 facing the eighth part 138 of the third floating electrode plate 123. The fourth sub-capacitance is formed by the seventh part 137 of the third floating electrode plate 123 facing the second electrode plate 142. During the reciprocating movement 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 along the third direction Y relative to the base 101, there will be no relative displacement 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 reciprocating movement of the second mover 112 relative to the first mover 111 along the second direction Y, since the capacitance values of the first sub-capacitance, the second sub-capacitance, and the fourth sub-capacitance remain unchanged, only the capacitance value of the third sub-capacitance changes. Then, the change in the capacitance value between the first electrode plate 141 and any second electrode plate 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 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 through the driving mechanism to compensate for the displacement caused by the jitter, so as to improve 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, 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. Therefore, the detection circuit 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, and correspondingly, the accuracy of the driving signal generated by the driving mechanism is improved, and the anti-shake accuracy of the anti-shake motor is improved.

[0045] Reference Figure 1 and Figure 2 Figure 2 , the anti - shake motor may further include an upper cover 102 and a pressing plate 103. The upper cover 102 and the base 101 enclose a receiving cavity. The first mover 111, the second mover 112, and the circuit board 104 are all received in the receiving cavity. The pressing plate 103 can play a protective role to avoid damage or contamination of the internal components of the anti - shake motor.

[0046]

[0046] The anti - shake motor further includes a plurality of balls 106. Balls 106 are provided between the first mover 111 and the base 101 to enable the movement of the first mover 111 relative to the base 101 along the third direction Z; balls 106 are provided between the bottom of the second mover 112 and the first mover 111 to enable the movement of the second mover 112 relative to the first mover 111 along the first direction X or the second direction Y.

[0047]

[0047] The anti - shake motor is further provided with a plurality of magnets 105. Correspondingly, a drive coil (not shown in the figure) is provided in the circuit board 104. The magnet 105 and the drive coil constitute a drive mechanism. The magnet 105 fixed on the side wall of the first mover 111 and the corresponding drive coil are used to drive the movement of the first mover 111 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 side wall along the second direction Y respectively corresponding drive coils are used to drive the movement of the second mover 112 relative to the first mover 111 along the first direction X or the second direction Y.

[0048]

[0048] The circuit board 104 may further include: two third electrode plates 143, and the third electrode plates 143 are 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, and the sixth part 136 is located on the bottom surface of the second mover 112; the anti - shake motor may further include: two fourth floating electrode plates 124, the fourth floating electrode plates 124 are located on the first mover 111, the fourth floating electrode plates 124 include a ninth part 139 and a tenth part 130 that are electrically connected to each other, the ninth part 139 is located on the side wall of the first mover 111, the tenth part 130 is located on the bottom surface of the first mover 111, and the tenth part 130 of any one of the fourth floating electrode plates 124 faces the sixth part 136 of the second floating electrode plate 122 to form a fifth sub - capacitor, and the ninth parts 139 of the two fourth floating electrode plates 124 face the two third electrode plates 143 respectively to form two sixth sub - capacitors.

[0049] The capacitance between the first electrode plate 141 and any third electrode plate 143 is composed of a first sub-capacitance, a second sub-capacitance, a fifth sub-capacitance and a sixth sub-capacitance connected in series. During the reciprocating movement of the second mover 112 relative to the first mover 111 along the first direction X, the capacitance values of the first sub-capacitance, the second sub-capacitance and the sixth sub-capacitance remain unchanged, and the capacitance value of the fifth sub-capacitance changes.

[0050] During the reciprocating movement 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, there is no relative displacement 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 movement of the second mover 112 relative to the first mover 111 along the first direction X, since the capacitance values of the first sub-capacitance, the second sub-capacitance and the sixth sub-capacitance remain unchanged and only the capacitance value of the fifth sub-capacitance changes, the change in the capacitance value 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 can be adjusted through the driving mechanism to compensate for the displacement caused by jitter, thereby improving the anti-shake accuracy of the anti-shake motor.

[0051] The circuit board 104 may further include: two fourth electrode plates 144, and the fourth electrode plates 144 are connected to the detection circuit; the first floating electrode 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 faces any fourth electrode plate 144 to form a seventh sub-capacitance. The capacitance between the first electrode plate 141 and any fourth electrode plate 144 is composed of the first sub-capacitance and the seventh sub-capacitance 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-capacitance remains unchanged, and the capacitance value of the seventh sub-capacitance changes. Thus, the change in the capacitance value between the first electrode plate 141 and any fourth electrode plate 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 value 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, and then the position of the first mover 111 can be adjusted through the driving mechanism to compensate for the displacement caused by jitter, thereby improving the anti-shake accuracy of the anti-shake motor.

[0052] In some embodiments, the length of the first electrode plate 141 in the third direction Y is greater than the length of the first portion 131 in the third direction Y. The actual area where charge storage can occur 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 in the third direction Z, and the length of the first electrode plate 141 in the third direction Y is greater than the length of the first portion 131 in the third direction Y, it is beneficial to ensure that during the movement of the first mover 111 relative to the base 101 in the third direction Z, the effective area of the first sub-capacitor does not change because the first portion 131 extends beyond the first electrode plate 141, and thus the capacitance value of the first sub-capacitor does not change.

[0053] It should be noted that in this embodiment, taking the shapes of both the first electrode plate 141 and the first portion 131 as rectangles as an example does not limit the shapes of the first electrode plate 141 and the first portion 131. In other embodiments, the shapes of the first electrode plate and the second portion can also be circular, triangular, trapezoidal or polygonal, etc., 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 in the third direction, so that the capacitance value of the first sub-capacitor does not change.

[0054] 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.

[0055] The actual area where charge storage can occur between the second portion 132 and the fourth portion 134 is the effective area of the second sub-capacitor, that is, the overlapping area of the orthographic projection of the second portion 132 on the bottom surface of the base 101 and the orthographic projection of the fourth portion 134 on the base of the base 101. Since the second mover 112 can only move relative to the first mover 111 in the first direction X or the second direction Y, the distance between the second portion 132 and the fourth portion 134 does not change. When 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, or the orthographic projection of the fourth portion 134 on the bottom surface of the base covers the orthographic projection of the second portion on the bottom surface of the base, during the movement of the second mover 112 relative to the first mover 111 in 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, and thus the capacitance value of the second sub-capacitor does not change.

[0056] It should be noted that in this embodiment, taking the shapes of the second part 132 and the fourth part 134 as triangles as an example, it does not limit the shapes of the first plate 141 and the first part 131. In other embodiments, the shapes of the first plate and the second part can also be circular, elliptical, trapezoidal or polygonal, etc., 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 in the first direction or the second direction, so that the capacitance value of the second sub-capacitor does not change.

[0057] In this embodiment, the eighth parts 138 of the two third floating plates 123 are arranged along the second direction Y. In other embodiments, the included angle between the arrangement direction of the eighth parts 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°, etc.

[0058] Figure 5 These are two schematic diagrams of the orthographic projections of the eighth part and the fifth part on the bottom surface of the base provided by the embodiments of the present application. The fifth part is in a semi-transparent state to facilitate the display of the overlapping area between the eighth part and the fifth part.

[0059] The actual area where charge can be stored 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. Refer 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 one of the third floating plates 123 changes, and the capacitance value of the corresponding third sub-capacitor changes.

[0060] Refer to Figure 5 In (a) of , the length of the fifth part 135 in the first direction X can be greater than the length of the eighth part 138 in the first direction X; or, refer to Figure 5 In (b) of , the length of the fifth part 135 in the first direction X can be less than the length of the eighth part 138 in the first direction X; or, the length of the fifth part in the first direction can also be equal to the length of the eighth part in the first direction. Refer to Figure 5 In (a) of , the length of the fifth part 135 in the second direction Y can be greater than the distance between the eighth parts 138 of the two third floating plates; or, refer to Figure 5In (b) thereof, the length of the fifth part 135 in the second direction Y may be equal to the distance between the eighth parts 138 of the two third floating plates; alternatively, the length of the fifth part in the second direction may also be less than the distance between the eighth parts of the two third floating plates.

[0061] It should be noted that the size and shape of the fifth part 135 and the size and shape of the eighth part 138 can both be adjusted according to the actual situation, so that during the movement of the second mover 112 relative to the first mover 111 in the second direction Y, the effective area between the fifth part 135 and the eighth part 138 of any one of the third floating plates 123 changes, so that the capacitance value of the third sub-capacitor changes.

[0062] The actual area where charge storage can be provided between the seventh part 137 of the third floating plate 123 and the second plate 142 is the effective area of the fourth sub-capacitor, that is, the overlapping area of the orthographic projection of the second plate 142 on one side surface of the circuit board 104 and the orthographic projection of the seventh part 137 on the same side surface of the circuit board 104. The shape and size of the second plate 142 and the shape and size of the seventh part 137 can be adjusted according to the actual situation, as long as the effective area between the seventh part 137 and the second plate 142 remains unchanged when the first mover 111 moves relative to the base 101 in the third direction Z, so that the capacitance value of the fourth sub-capacitor does not change. For the specific settings, reference can be made to the aforementioned first plate 141 and the first part 131, which will not be elaborated here.

[0063] In this embodiment, the tenth parts 130 of the two fourth floating plates 124 are arranged along the first direction X. In other embodiments, the included angle between the arrangement direction of the tenth parts 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°, etc.

[0064] The actual area where charge storage can be provided 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 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 the actual situation, as long as the effective area between the sixth part 136 and the tenth part 130 of any one of the fourth floating plates 124 changes during the movement of the second mover 112 relative to the first mover 111 in the first direction X, 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 aforementioned fifth part 135 and the eighth part 138, which will not be elaborated here.

[0065] The actual area 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 surface of the circuit board 104 and the orthographic projection of the third electrode plate 143 on the same side 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 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. For the specific settings, reference can be made to the aforementioned first electrode plate 141 and the first part 131, which will not be elaborated here.

[0066] The actual area 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 surface of the circuit board 104 and the orthographic projection of the third part 133 on the same side 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 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 that the capacitance value of the seventh sub-capacitor changes. For the specific settings, reference can be made to the aforementioned fifth part 135 and the eighth part 138.

[0067] 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 part 133. In this way, an effective area can always be generated between the third part 133 and any one of the fourth electrode plates 144 during the movement, thereby avoiding the problem of sudden changes in capacitance detection, improving the accuracy of position detection, and improving the anti-shake accuracy of the anti-shake motor.

[0068] In some embodiments, along the third direction Z, the spacing between the fourth electrode plates 144 is less than the width of the third part 133. In this way, when the third part 133 moves between the fourth electrode plates 144, the situation where neither of the two fourth electrode plates 144 can obtain capacitance can be avoided, thereby avoiding the problem of sudden changes in capacitance detection, improving the accuracy of position detection, and improving the anti-shake accuracy of the anti-shake motor.

[0069] In this embodiment, it is taken as an example that both the second electrode plate 142 and the third electrode plate 143 are 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. Correspondingly, 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 can 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 can be adjusted according to the position of the third electrode plate 143.

[0070] 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 not change. Thus, 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 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 of the third sub-capacitor and the fifth sub-capacitor. 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 deduced inversely. Similarly, during the movement of the second mover 112 relative to the first mover 111 along the second direction Y, the fifth capacitance value may or may not change.

[0071] It should be noted that in the drawings provided in this embodiment, the shape and position of the electrical connection traces between the first portion 131, the second portion 132, and the third portion 133 corresponding to the first floating electrode plate 121 are only examples and do not constitute a limitation on the shape and position of the electrical connection traces between the first portion 131, the second portion 132, and the third portion 133. The shape and position of the electrical connection traces between the first portion 131, the second portion 132, and the third portion 133 can be adjusted according to the actual situation. Similarly, the shape and position of the electrical connection traces between the fourth portion 134, the fifth portion 135, and the sixth portion 136 corresponding to the second floating electrode plate 122 can be adjusted according to the actual situation; the shape and position of the electrical connection traces between the seventh portion 137 and the eighth portion 138 corresponding to the third floating electrode plate 123 can be adjusted according to the actual situation; the shape and position of the electrical connection traces between the ninth portion 139 and the tenth portion 130 corresponding to the fourth floating electrode plate 124 can be adjusted according to the actual situation.

[0072] In the anti-shake motor provided by 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. The capacitance between the first electrode plate 141 and any one of the second electrode plates 142 is composed of a first sub-capacitance, a second sub-capacitance, a third sub-capacitance, and a fourth sub-capacitance connected in series. The first sub-capacitance is formed by the first electrode plate 141 facing the first part 131 of the first floating electrode plate 121. The second sub-capacitance 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-capacitance 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-capacitance is formed by the seventh part 137 of the third floating electrode plate 123 facing the second electrode plate 142. During the reciprocating movement of the second mover 112 relative to the first mover 111 along the second direction Y, since the capacitance values of the first sub-capacitance, the second sub-capacitance, and the fourth sub-capacitance remain unchanged, and only the capacitance value of the third sub-capacitance changes, the change in the capacitance value between the first electrode plate 141 and any one of the second electrode plates 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 plate 141 and any one of the second electrode plates 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 through the driving mechanism to compensate for the displacement caused by jitter, 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, and the circuit board 104 is fixed to the base 101, the detection circuit of the first electrode plate 141 and the second electrode plate 142 does not need to be connected to any mover, so the detection circuit 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. Correspondingly, the accuracy of the driving signal generated by the driving mechanism is improved, and the anti-shake accuracy of the anti-shake motor is improved.

[0073] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present application. In actual applications, various changes can be made in form and details without departing from the spirit and scope of the present application. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be subject to the scope defined by 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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