Lens driving mechanism

Abstract

The utility model discloses a lens driving mechanism, which comprises a base, a prism carrier, a lens carrier and a plurality of capacitive sensing elements, the base comprises a bottom plate, a side plate, a polar plate, a transmitting polar plate and two receiving polar plates, and the side plate is connected to the side part of the bottom plate along a second direction. The polar plate is positioned at the rear part of the bottom plate or the side plate. The emission pole plate extends along the first direction and is located in the side plate. The receiving polar plates are located in the side plates side by side in the first direction and form a capacitor structure with the transmitting polar plates. The prism carrier comprises a support and a first metal frame, and an inclined supporting face is arranged at the front end of the support. The first metal frame comprises a pole piece, and the pole piece and the pole plate are oppositely arranged to form a capacitor structure. The lens carrier comprises a carrier frame and a second metal frame. The second metal frame is located in the carrier frame and comprises two metal plates, the two metal plates are located on the two sides of the carrier frame respectively, and one metal plate is arranged opposite to the transmitting polar plate and the receiving polar plate. The plurality of capacitive sensing elements are electrically connected with the plurality of capacitive structures.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical element drive technical field, especially relate to a lens drive mechanism. BACKGROUND

[0002] With the development of science and technology, nowadays many electronic devices (for example, smart phones or digital cameras) have the functions of taking pictures or recording videos. These electronic devices are increasingly popular and are developing towards convenient and thin designs to provide users with more choices.

[0003] Some electronic devices with photographing or video recording functions are provided with a lens drive mechanism to drive the optical components of the lens to move, thereby achieving the function of automatic focusing.

[0004] Currently, sensors are used in lens drive mechanisms to detect the positions of lens carriers or prism carriers, which usually need to arrange lines on the prism carriers or lens carriers. These lines will affect the operation of the prism carriers and the lens carriers. SUMMARY

[0005] The utility model aims at providing a lens drive mechanism to solve the problems in the prior art.

[0006] To solve the above technical problems, the embodiment of the utility model provides a lens drive mechanism, which comprises:

[0007] A base, the base comprises:

[0008] A bottom plate extending along a first direction;

[0009] A side plate connected to the side of the bottom plate along a second direction and forming a containing space with the bottom plate, the second direction being perpendicular to the first direction;

[0010] At least one pole plate located at the back of the bottom plate or the side plate;

[0011] At least one emitter plate extending along the first direction and located in the side plate; and

[0012] At least two receiver plates located side by side in the side plate along the first direction and forming a capacitor structure with the emitter plate;

[0013] A prism carrier located at the back end of the containing space and arranged to rotate around an axis extending along the first direction and an axis extending along the second direction, the prism carrier comprising:

[0014] A support provided with an inclined support surface at the front end for supporting a prism; and

[0015] a first metal frame comprising at least one pole piece, the pole piece being arranged opposite to the plate to form another capacitor structure;

[0016] a lens carrier located at the front end of the accommodating space and arranged to be movable along the first direction, the lens carrier comprising:

[0017] a carrier frame having a mounting slot extending along the first direction, the mounting slot extending through the carrier frame along the first direction for mounting a lens; and

[0018] a second metal frame located within the carrier frame and comprising at least two metal plates, the two metal plates being respectively located at two sides of the carrier frame along a second direction, and one of the metal plates being arranged opposite to the emitter plate and the receiver plate;

[0019] a plurality of capacitor sensing elements, the plurality of capacitor sensing elements being electrically connected to the plurality of capacitor structures.

[0020] In one embodiment, the base comprises two side plates, a front end plate and a rear end plate, the front end plate being connected to the front end of the bottom plate and provided with lightproof holes aligned with the mounting slots;

[0021] the rear end plate being connected to the rear end of the bottom plate.

[0022] In one embodiment, two plates are located within the bottom plate and arranged spaced apart along the first direction;

[0023] the other two plates are located within the side plates and arranged spaced apart along the first direction;

[0024] two pole pieces are located at the bottom surface of the bracket and form a first capacitor structure with the two plates;

[0025] the other two pole pieces are located at the side of the bracket and form a second capacitor structure with the other two plates.

[0026] In one embodiment, the base further comprises an internal circuit, the internal circuit being located within the bottom plate and the side plates and connected to the first capacitor structure, the second capacitor structure and the capacitor sensing elements.

[0027] In one embodiment, the internal circuit is electrically connected to the emitter plate and the receiver plate.

[0028] In one embodiment, the lens driving mechanism further comprises a spring, the spring being located at the top surface of the bracket and the side plates and connected to the bracket and the side plates.

[0029] In one embodiment, the spring is electrically connected with the first metal frame and the built-in circuit.

[0030] In one embodiment, the base further comprises a bottom metal plate, which is electrically connected with the built-in circuit and located in the bottom plate.

[0031] In one embodiment, the base further comprises two baffles, which are connected with the inner walls of the two side plates and located between the prism carrier and the lens carrier.

[0032] In one embodiment, the top surface of the bottom plate is provided with a support protrusion, and the top surface of the support protrusion is provided with a first ball groove;

[0033] The bottom of the prism carrier is provided with a groove accommodating the support protrusion, and the top wall of the groove is provided with a second ball groove;

[0034] The lens driving mechanism further comprises a ball, which is located in the first ball groove and the second ball groove to support the bracket to rotate around an axis extending in the first direction and an axis extending in the second direction. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figures 1-4 is an exploded view of the lens driving mechanism of one embodiment of the utility model.

[0036] Figure 5 is Figure 1 an assembly view of the lens driving mechanism in the embodiment shown.

[0037] Figure 6 is Figure 5 a sectional view of the lens driving mechanism along line A-A in the embodiment shown.

[0038] Figure 7 is Figure 5 a sectional view of the lens driving mechanism along line B-B in the embodiment shown.

[0039] Figure 8 is Figure 1 an exploded view of the lens driving mechanism in the embodiment shown.

[0040] Figure 9 is Figure 1 a perspective view of the first metal frame, the second metal frame, the spring, the built-in circuit and the four pole pieces in the embodiment shown.

[0041] Figure 10 is Figure 9 a perspective view of the first metal frame in the embodiment shown.

[0042] 10, lens driving structure; 1, base; 11, bottom plate; 111, support protrusion; 12, side plate; 121, avoiding gap; 122, baffle; 13, front end plate; 14, rear end plate; 15, built-in circuit; 16, first pole plate; 17, second pole plate; 18, emitter plate; 19, receiver plate; 2, prism carrier; 21, support; 22, first metal frame; 221, first pole piece; 222, second pole piece; 223, support plate; 224, back plate; 225, second ball groove; 226, metal strip; 23, nodding magnet group; 24, shaking magnet group; 25, groove; 26, mounting gap; 27, support surface; 29, ball; 3, lens carrier; 31, mounting groove; 32, carrier frame; 33, second metal frame; 34, metal plate; 35, zoom magnet group; 36, damping colloid; 4, reed; 5, shell; 6, nodding coil group; 7, shaking coil group; 8, zoom coil group; 9, capacitor element; DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that in the embodiments of the present application, many technical details are proposed in order to make the readers better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the claims of the present application can be realized.

[0044] Unless the context requires otherwise, throughout the specification and claims which follow, the word "comprise" and variations thereof, such as "comprising" and "comprises", are to be construed in an open, inclusive sense, that is as "including, but not limited to".

[0045] The embodiments of the present application will be described in detail below with reference to the drawings, so as to make the purpose, characteristics and advantages of the present application more clear. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present application, but only for illustrating the essential spirit of the technical scheme of the present application.

[0046] The reference to "one embodiment" or "an embodiment" in the entire specification means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the occurrence of "in one embodiment" or "in an embodiment" in various places in the specification does not necessarily refer to the same embodiment. In addition, a particular feature, structure or characteristic can be combined in any way in one or more embodiments.

[0047] As used in this specification and the appended claims, the singular forms“a,”“an” and“the” include plural referents unless the content clearly dictates otherwise. It should be noted that the term“or” is generally employed in its sense including“and / or”, unless the content clearly dictates otherwise.

[0048] In the following description, in order to clearly show the structure and working mode of the utility model, many directional words will be used for description, but the words of“front”, “back”, “left”, “right”, “outer”, “inner”, “outward”, “inward”, “up”, “down” and the like should be understood as convenient words, and should not be understood as limiting words.

[0049] The utility model relates to a kind of lens driving mechanism, which includes base 1, prism carrier 2, lens carrier 3, reed 4 and shell 5, wherein, base 1 has accommodating space, for accommodating prism carrier 2 and lens carrier 3, prism carrier 2 is used to install prism, and prism can make light direction turn, and prism carrier 2 can move prism, to change the illumination direction of light. Lens carrier 3 is used to install lens, and zoom operation of lens is realized by the movement of lens carrier 3. Reed 4 is used to drive prism carrier 2 reset. Shell 5 is covered in the top end of accommodating space and is connected with the bottom of base 1.

[0050] In one specific embodiment, as shown in Figures 1-4 Base 1 includes bottom plate 11, two side plates 12, front end plate 13 and rear end plate 14. Bottom plate 11 is a plate-shaped extending along a first direction, which is also the optical axis direction of the lens. Two side plates 12 are respectively connected to the two sides of bottom plate 11 along a second direction, and the second direction is perpendicular to the first direction. Both the first direction and the second direction are perpendicular to the vertical direction in Figure 1 The front end plate 13 and the rear end plate 14 are respectively connected to the front end and the rear end of the bottom plate 11 along the first direction. The front end plate 13 is located at one end close to the lens carrier 3 and is provided with a light-proof hole, and the rear end plate 14 is located at one end close to the prism carrier 2. The front end plate 13, the rear end plate 14, the two side plates 12 and the bottom plate 11 form an accommodating space.

[0051] Base 1 further includes two four polar plates and built-in circuit 15. The four polar plates are all conductive and integrally formed with the built-in circuit 15. The built-in circuit 15 can electrify the four polar plates after being electrified. Two of the four polar plates are first polar plates 16, and the other two are second polar plates 17. The two first polar plates 16 extend along the second direction and are arranged side by side in the bottom plate 11 along the first direction. The two second polar plates 17 are arranged side by side in one of the two side plates 12 along the first direction. Both the two first polar plates 16 and the two second polar plates 17 are close to the rear end of the base 1.

[0052] The prism carrier 2 is located at the rear end of the accommodating space, and the top surface of the prism carrier 2 is provided with a concave support surface 27, which is an inclined surface and can project light coming from the top to the lens located at the front end of the accommodating space after a 90° turn.

[0053] Specifically, the prism carrier 2 includes a bracket 21 and a first metal frame 22 located in the bracket 21, and the top surface of the bracket 21 is provided with a support surface 27 for mounting the prism.

[0054] The first metal frame 22 includes four pole pieces, a back plate 224, a support plate 223, and a metal strip 226 connecting the four pole pieces, the back plate 224, and the support plate 223 to each other, and the entire first metal frame 22 is integrally formed and can conduct electricity.

[0055] Of the four pole pieces, two pole pieces are located at the bottom of the bracket 21 and are first pole pieces 221. The other two pole pieces are located at the side of the bracket 21 along the second direction and are second pole pieces 222.

[0056] The two first pole pieces 221 and the two first pole plates 16 are aligned along the vertical direction, and the two first pole pieces 221 and the two first pole plates 16 form a first capacitance structure after being electrified. The two second pole pieces 222 and the two second pole plates 17 are aligned along the second direction, and each forms a second capacitance structure after being electrified. In addition, the base 1 is also provided with a capacitance sensing element, which is electrically connected with the built-in circuit 15 and can sense the capacitance change of the first capacitance structure and the second capacitance structure.

[0057] The lens driving mechanism further includes three coil groups and three magnet groups, one of which is a nodding coil group 6, the other is a shaking coil group 7, and the last is a zoom coil group 8. The three magnet groups correspondingly are a nodding magnet group 23, a shaking magnet group 24, and a zoom magnet group 35, respectively.

[0058] The shaking coil group 7 is installed at the rear end of the bottom plate 11 and is electrically connected with the built-in circuit 15 of the base 1, and the shaking magnet group 24 is installed at the bottom of the bracket 21 and is aligned with the shaking coil group 7 along the vertical direction. After the built-in circuit 15 is electrified, the shaking coil group 7 and the shaking magnet group 24 cooperate to drive the bracket 21 to rotate around an axis extending along the second direction. When the bracket 21 rotates, the distance between the two second pole pieces 222 and the two second pole plates 17 changes, the upper end of the two first pole pieces 221 approaches the second pole plate 17, and the lower end deviates from the second pole plate 17, the projection area of the two second pole pieces 222 and the two second pole plates 17 changes, thereby changing the capacitance of the second capacitance structure, and the rotation amplitude of the bracket 21 around the axis extending along the first direction is determined by the capacitance change. That is, the amplitude of the shaking of the bracket 21 can be determined by the capacitance change of the second capacitance structure.

[0059] The nodding coil assembly 6 is installed in the rear end plate 14 and is also electrically connected to the built-in circuit 15 of the base 1. The nodding magnet assembly 23 is installed at the rear end of the bracket 21 and is used to cooperate with the nodding coil assembly 6 to drive the bracket 21 to rotate around an axis extending along the first direction. During the rotation of the bracket 21, one of the two first pole pieces 221 deflects upward and the other deflects downward, and the capacitance of the first capacitor structure formed by the two first pole pieces 221 and the two first pole plates 16 changes. The capacitance sensing element 9 detects the change in capacitance to determine the amplitude of the bracket 21's rotation around the axis extending along the second direction.

[0060] The nodding amplitude of the bracket 21 can be determined by the change in the capacitance of the first capacitor structure.

[0061] The zoom coil assembly 8 is mounted on the front end of the side plate 12 , and the zoom magnet assembly 35 is mounted on the carrier and cooperates with the zoom coil assembly 8 to drive the lens carrier 3 to move along the first direction to adjust the focal length of the lens, which will be described in detail below.

[0062] exist Figures 2-5 In the illustrated embodiment, the base 1, rear panel 14, and side panels 12 each have slots for mounting coil assemblies, ensuring that multiple coil assemblies do not occupy any space. The rear end and bottom of the bracket 21 also have slots for accommodating the nodding coil assembly 6 and the shaking coil assembly 7. Similarly, the multiple coil assemblies do not protrude from the outer surface of the bracket 21.

[0063] The bottom of the bracket 21 is also provided with a groove 25, located at the center of the bracket 21 along the first and second directions. The top surface of the base plate 11 is also provided with a protruding support protrusion 111, which is located within the groove 25 and has a recessed first ball groove on its top surface. This ball groove serves as a fulcrum when the bracket nods or shakes its head, reducing friction.

[0064] The support plate 223 is located on the top wall of the groove 25 and is recessed toward the top to form a second ball groove 225. The first ball groove and the second ball groove 225 are arranged opposite to each other in the vertical direction and accommodate a ball 29. The ball 29 can support the bracket 21 to rotate around the axis extending along the first direction and around the axis extending along the second direction.

[0065] The two springs 4 are respectively located on the top surfaces of the bracket 21 and the side plates 12 and on both sides of the bracket 21 along the second direction. The two springs 4 are respectively connected to the bracket 21 and the two side plates 12 and have a certain elasticity. After the bracket 21 rotates, it can drive the bracket 21 to reset.

[0066] In addition, the two spring sheets 4 can also be energized and are respectively electrically connected with the built-in circuit 15 and the first metal frame 22. The built-in circuit 15 can energize the first pole sheet 221 and the second pole sheet 222 after being energized.

[0067] Specifically, the top surface of the two side plates 12 is respectively provided with a recessed avoiding gap 121, which is close to the rear end of the two side plates 12. The top surface of the bracket 21 is also provided with two mounting gaps 26, which are respectively located on both sides of the bracket 21 along the second direction. The two spring sheets 4 are respectively located in the two avoiding gaps 121 and the two mounting gaps 26.

[0068] In addition, the connection end of the built-in circuit 15 is located in the avoiding gap 121, and the connection end of the first metal frame 22 is also located in the mounting gap 26. The two spring sheets 4 are respectively electrically connected with the connection end of the built-in circuit 15 and the connection end of the first metal frame 22.

[0069] The back plate 224 is located in the bracket 21 and close to the rear end of the bracket 21. The back plate 224 is attached to the nodding magnet group 23 to fix the nodding magnet group 23 and can also improve the stability of the bracket 21.

[0070] The base 1 further comprises an emitter plate 18 and two receiver plates 19. The emitter plate 18 and the receiver plates 19 are both metal plates 34 and are integrally formed with the built-in circuit 15. After the built-in circuit 15 is energized, the emitter plate 18 and the two receiver plates 19 form two capacitor structures, which are defined as third capacitor structures.

[0071] Specifically, the emitter plate 18 extends along the first direction and is located in one of the side plates 12. The two receiver plates 19 and the emitter plate 18 are located in the same side plate 12 and at the bottom end of the emitter plate 18. The two receiver plates 19 are arranged side by side along the first direction. The built-in circuit 15 can energize the two receiver plates 19 and the emitter plate 18. In addition, the base 1 further comprises another capacitor sensing element 9, which is located in the same side plate 12 as the two receiver plates 19 and is electrically connected with the built-in circuit 15 and the two third capacitor structures, for sensing the capacitance of the two third capacitor structures.

[0072] The lens carrier 3 comprises a carrier frame 32 and a second metal frame 33. The carrier frame 32 extends along the first direction and is provided with a recessed mounting groove 31 at the top. The mounting groove 31 penetrates the carrier frame 32 along the first direction and is used for mounting a lens. The mounting groove 31 is aligned with the light-shielding hole of the front end plate 13 along the first direction, and light can be emitted from the light-shielding hole.

[0073] The front end side wall of the mounting groove 31 is a slope gradually deviating from the center of the mounting groove 31 along the second direction from back to front, that is, the front end opening of the mounting groove 31 gradually increases from back to front, which facilitates the emission of light.

[0074] The second metal frame 33 is located in the carrier frame 32 and includes two metal plates 34, which are respectively located on both sides of the carrier frame 32 along the second direction. One of the metal plates 34 is arranged opposite to the emitter plate 18 and the two receiver plates 19, and the height of the metal plate 34 exceeds the height of the emitter plate 18 and forms a floating capacitor structure with the emitter plate 18 and the receiver plates 19. When the carrier frame 32 moves along the first direction, the capacitance of the third capacitor structure between the emitter plate 18 and one of the receiver plates 19 gradually increases, and the capacitance of the third capacitor structure between the emitter plate 18 and the other receiver plate 19 gradually decreases. The change of the capacitance of the two third capacitor structures can be used to determine the position of the carrier frame 32, so as to more accurately control the carrier frame 32 to move to the target position, thereby improving the accuracy of the closed-loop control of the carrier frame 32.

[0075] The other metal plate 34 is located on the other side of the carrier frame 32 and is used to adsorb the zoom magnet group 35 in the carrier frame 32. The zoom magnet group 35 is installed in the carrier frame 32 and is arranged opposite to the zoom coil group 8 of the other side plate 12. The zoom coil group 8 is electrically connected to the built-in circuit 15 and, after being powered on, cooperates with the zoom magnet group 35 to drive the carrier frame 32 to move the carrier along the first direction, which is also the optical axis direction of the lens.

[0076] In addition, the bottom of the carrier frame 32 is also provided with a metal plate 34, and the three metal plates 34 are connected to each other to form a stable second metal frame 33 structure, so as to increase the stability of the carrier frame 32.

[0077] The bottom plate 11 is also provided with a bottom metal plate 34, which is integrally formed with the built-in circuit and can also electrically connect the built-in circuits 15 in the two side plates 12 to each other.

[0078] As a preferred solution, the inner side surfaces of the emitter plate 18 and the receiver plate 19 are flush with the inner side surfaces of the corresponding side plates 12, and the emitter plate 18 and the receiver plate 19 are respectively embedded in the side plates 12 and the inner side surfaces thereof do not protrude from the inner side surfaces of the side plates 12. The outer side surfaces of the metal plates 34 corresponding to the emitter plate 18 and the receiver plate 19 are also flush with the side surfaces of the carrier frame 32, that is, the metal plates 34 do not protrude from the outer side surfaces of the carrier frame 32 and are closer to the emitter plate 18 and the receiver plate 19.

[0079] The length of the emitter plate 18 along the first direction is greater than or equal to the total length of the two receiver plates 19 arranged side by side along the first direction. The emitter plate 18 needs to form a capacitor structure with the two receiver plates 19, and the length thereof should be greater than the length of the two receiver plates 19 as much as possible.

[0080] The front end of the carrier frame 32 is provided with a damping gel 36 arranged on both sides of the carrier frame 32 close to the second direction, for buffering the force of the carrier frame 32 touching the front end plate 13 when moving in the first direction.

[0081] The inner side of the two side plates 12 is also respectively provided with a baffle 122, which is aligned along the second direction and located between the prism carrier 2 and the lens carrier 3, for preventing the prism carrier 2 and the lens carrier 3 from interfering with each other when moving.

[0082] The emitter plate and the receiver plate of the utility model are arranged in the side plate and electrically connected with the built-in circuit, and the lens carrier does not need to be provided with any circuit. The first metal frame in the prism carrier can be electrically connected with the built-in circuit through the reed, and other circuits are not needed, and the lens driving mechanism does not need to be provided with circuits inside, which can guarantee that the operation of the prism carrier and the lens carrier is not disturbed.

[0083] The preferred embodiments of the utility model have been described in detail above, but it should be understood that, if necessary, aspects of the embodiments can be modified to adopt aspects, features and concepts of various patents, applications and publications to provide additional embodiments.

[0084] In view of the above detailed description, these and other changes can be made to the embodiments. Generally speaking, in the claims, the terms used should not be considered to be limited to the specific embodiments disclosed in the specification and claims, but should be understood to include all possible embodiments together with the full scope of equivalents enjoyed by these claims.

[0085] Those skilled in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the utility model, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the utility model.

Claims

1. A lens driving mechanism, characterized in that: The lens driving mechanism comprises: A base, comprising: a bottom plate extending along a first direction; a side plate connected to a side portion of the bottom plate along a second direction and forming a receiving space with the bottom plate, the second direction being perpendicular to the first direction; at least one electrode plate, the electrode plate being located at the rear of the bottom plate or the side plate; at least one emitter plate; the emitter plate extends along the first direction and is located within the side plate; and at least two receiving plates, the receiving plates being arranged side by side in the side plate along the first direction and forming a capacitor structure with the emitting plate; A prism carrier, located at the rear end of the accommodating space and configured to rotate about an axis extending along the first direction and about an axis extending along the second direction, and comprising: A bracket, wherein the front end of the bracket is provided with an inclined supporting surface for supporting the prism; and a first metal frame, the first metal frame comprising at least one electrode piece, the electrode piece and the electrode plate being arranged opposite to each other to form another capacitor structure; a lens carrier, the lens carrier being located at the front end of the accommodating space and being configured to be movable along the first direction, the lens carrier comprising: a carrier frame, the carrier frame having a mounting groove extending along the first direction, the mounting groove penetrating the carrier frame along the first direction, and being used for mounting a lens; and a second metal frame, the second metal frame being located in the carrier frame and comprising at least two metal plates, the two metal plates being respectively located on two sides of the carrier frame along the second direction, and one of the metal plates being disposed opposite to the emitter plate and the receiver plate; A plurality of capacitance sensing elements are electrically connected to the plurality of capacitance structures.

2. The lens driving mechanism according to claim 1, wherein: The base includes two side panels, a front end panel and a rear end panel, wherein the front end panel is connected to the front end of the bottom panel and is provided with a light-shielding hole aligned with the mounting groove; The rear end plate is connected to a rear end of the bottom plate.

3. The lens driving mechanism according to claim 1, wherein: Two electrode plates are located in the bottom plate and are spaced apart along the first direction; The other two electrode plates are located inside the side plate and are spaced apart along the first direction; The two electrode pieces are located on the bottom surface of the bracket and form a first capacitor structure with the two electrode plates; The other two electrode pieces are located on the side of the bracket and form a second capacitor structure with the other two electrode plates.

4. The lens driving mechanism according to claim 3, wherein: The base further includes a built-in circuit, which is located in the bottom plate and the side plate and is connected to the first capacitor structure, the second capacitor structure and the capacitive sensing element.

5. The lens driving mechanism according to claim 4, wherein: The built-in circuit is electrically connected to the emitter plate and the receiver plate.

6. The lens driving mechanism according to claim 4, wherein: The lens driving mechanism further includes a spring, which is located on the top surfaces of the bracket and the side plate and is connected to the bracket and the side plate.

7. The lens driving mechanism according to claim 6, wherein: The spring is electrically connected to the first metal frame and the built-in circuit.

8. The lens driving mechanism according to claim 4, wherein: The base further includes a bottom metal plate, which is electrically connected to the built-in circuit and is located inside the bottom plate.

9. The lens driving mechanism according to claim 2, wherein: The base further includes two baffles, which are connected to the inner walls of the two side plates and are located between the prism carrier and the lens carrier.

10. The lens driving mechanism according to claim 1, wherein: The top surface of the bottom plate is provided with a supporting protrusion, and the top surface of the supporting protrusion is provided with a first ball rolling groove; The bottom of the prism carrier is provided with a groove for accommodating the supporting protrusion, and the top wall of the groove is provided with a second ball groove; The lens driving mechanism further includes balls located in the first ball groove and the second ball groove to support the bracket to rotate around an axis extending along the first direction and around an axis extending along the second direction.

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