Piezoelectric motor, camera module and electronic device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
- Filing Date
- 2021-12-31
- Publication Date
- 2026-07-24
Smart Images
Figure CN116437178B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of electronic devices, specifically to a piezoelectric motor, a camera module, and an electronic device. Background Technology
[0002] With the continuous development of electronic devices, they have become indispensable entertainment and social tools in people's daily lives, and people's demands for electronic devices are also increasing. Taking mobile phones as an example, some manufacturers incorporate piezoelectric drive structures into their camera modules to drive lens movement, thereby achieving the camera module's autofocus function. However, the existing piezoelectric drive structures have a relatively large lateral dimension, which is not conducive to the layout of internal components in mobile phones. Therefore, how to miniaturize piezoelectric drive structures has become a major focus for industry professionals. Summary of the Invention
[0003] One embodiment of this application provides a piezoelectric motor for driving the movement of a lens in a camera module. The piezoelectric motor includes: a frame, a carrier, multiple driving components, and an elastic component; the frame is provided with a bottom wall and a side wall; the bottom wall and the side wall enclose a receiving space; the side wall is provided with multiple through slots, the same number as the driving components, which are also connected to the receiving space; the carrier is disposed in the receiving space and configured to support the lens; one driving component is disposed in one of the through slots and abuts against the carrier, and is configured to vibrate after being energized to drive the carrier to move; the elastic component is provided with multiple elastic parts, the same number as the driving components, and connecting parts respectively connected to the multiple elastic parts; one elastic part is disposed on the side of one driving component away from the carrier and abuts against the driving component; the connecting part is disposed on the side wall.
[0004] Another embodiment of this application provides a camera module, which includes: a lens, a circuit board, a light sensor, and the aforementioned piezoelectric motor; the lens is disposed on the carrier, the circuit board is disposed on the side of the bottom wall away from the carrier, and the circuit board is also electrically connected to the driving component; the light sensor is disposed on the side of the circuit board facing the bottom wall and is disposed opposite to the lens.
[0005] This application embodiment also provides an electronic device, the electronic device including: a display screen, a housing and the above-mentioned camera module; the display screen is connected to the housing, and the two together enclose an installation space; the camera module is disposed in the installation space.
[0006] The piezoelectric motor provided in this application uses a frame consisting of a bottom wall and side walls that are connected. Multiple through-slots, communicating with the receiving space formed by the bottom and side walls, are provided on the side walls. This allows multiple drive components, the same number as the number of through-slots, to be respectively housed within these slots. The slots accommodate the drive components, reducing the space occupied by the drive components between the side walls and the carrier, thereby reducing the lateral dimension of the frame. Simultaneously, by using multiple elastic parts, the same number as the drive components, and connecting parts that connect these elastic parts, with each elastic part corresponding to a drive component, the motor provides elastic force to the drive components, causing them to abut against the carrier. This enables the drive components to vibrate when energized, driving the carrier to move. This configuration allows multiple drive components to share the elastic force provided by the same elastic part for abutment, reducing assembly steps and production costs of the piezoelectric motor. Attached Figure Description
[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0008] Figure 1 This is a schematic diagram of the structure of the electronic device 10 provided in the embodiments of this application;
[0009] Figure 2 yes Figure 1 An exploded view of the electronic device 10;
[0010] Figure 3 yes Figure 2 A structural schematic diagram of the central camera module 300;
[0011] Figure 4 yes Figure 3 Exploded view of the central camera module 300;
[0012] Figure 5 yes Figure 3 A schematic diagram of the cross-sectional structure of the central camera module 300 along line V-V;
[0013] Figure 6 yes Figure 4 Exploded view of the structure of medium-voltage electric motor 320;
[0014] Figure 7 yes Figure 3 Schematic diagram of the cross-sectional structure of medium-voltage electric motor 320 along line IV-IV;
[0015] Figure 8 yes Figure 6Schematic diagram of the structure of the middle frame 321;
[0016] Figure 9 yes Figure 3 A schematic diagram of the cross-sectional structure of the medium-voltage electric motor 320 along line VI-VI;
[0017] Figure 10 yes Figure 6 Schematic diagram of the drive component 323;
[0018] Figure 11 yes Figure 6 Schematic diagram of the structure of the elastic element 324;
[0019] Figure 12 yes Figure 6 Another schematic diagram of the connection structure between the middle frame 321 and the elastic element 324;
[0020] Figure 13 yes Figure 9 Another enlarged view of a portion at point A;
[0021] Figure 14 yes Figure 3 A schematic diagram of another cross-section of the medium-voltage electric motor 320 along line VI-VI;
[0022] Figure 15 yes Figure 3 A schematic diagram of another cross-sectional structure of the medium-voltage electric motor 320 along line VI-VI;
[0023] Figure 16 yes Figure 15 Schematic diagram of the structure of the elastic element 324;
[0024] Figure 17 yes Figure 3 A schematic diagram of the cross-sectional structure of the medium-voltage electric motor 320 along line VI-VI. Detailed Implementation
[0025] As used herein, “electronic device” (or simply “terminal”) includes, but is not limited to, means configured to receive / transmit communication signals via a wired connection (such as via a Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital Cable, Direct Cable Connection, and / or another data connection / network) and / or via a wireless interface (e.g., for cellular networks, Wireless Local Area Networks (WLANs), Digital Television Networks such as DVB-H networks, Satellite Networks, AM-FM Broadcast Transmitters, and / or another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a “wireless communication terminal,” a “wireless terminal,” or a “mobile terminal.” Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that may combine cellular radiotelephone with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, notepads, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.
[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.
[0027] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0028] Please see Figures 1 to 2 , Figure 1 This is a schematic diagram of the structure of the electronic device 10 provided in the embodiments of this application. Figure 2 yes Figure 1 A schematic diagram of the exploded structure of the electronic device 10.
[0029] The electronic device 10 provided in this application embodiment can be a mobile phone, tablet computer, laptop computer, smartwatch, or other device with a camera function. The following description uses a mobile phone as an example. Figures 1 to 2As shown, the electronic device 10 may include a display screen 100, a housing 200, and a camera module 300. The display screen 100 can be connected to the housing 200, and the two can jointly enclose an installation space 101. The camera module 300 can be disposed within the installation space 101 and can be used to receive light from outside the installation space 101 for imaging. In this embodiment, the camera module 300 also has the advantage of a small lateral dimension, reducing the space occupied by the camera module 300 within the installation space 101, thereby facilitating the device layout within the installation space 101.
[0030] It is understood that the aforementioned lateral dimension may refer to the dimension of the camera module 300 in the direction perpendicular to the optical axis Y. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or devices.
[0031] Specifically, the display screen 100 can be used to provide image display functionality for the electronic device 10, and when the user uses the camera function of the electronic device 10, the display screen 100 can also display the image from the camera module 300 to facilitate the user's shooting. For example... Figures 1 to 2As shown, the display screen 100 can be placed over one side of the housing 200, and the two can be bonded together with adhesive. The display screen 100 may include a transparent cover, a touch panel, and a display panel stacked sequentially. The surface of the transparent cover can be smooth and flat to facilitate touch operations such as clicking, swiping, and pressing. The transparent cover can be made of rigid materials such as glass, or flexible materials such as polyimide (PI) or colorless polyimide (CPI). The touch panel is disposed between the transparent cover and the display panel, and is used to respond to user touch operations, converting the corresponding touch operations into electrical signals that are transmitted to the processor of the electronic device 10, enabling the electronic device 10 to react accordingly. The display panel is mainly used to display images and can also serve as an interactive interface to instruct the user to perform the aforementioned touch operations on the transparent cover. The display panel can use an OLED (Organic Light-Emitting Diode) screen or an LCD (Liquid Crystal Display) screen to realize the image display function of the electronic device 10. In this embodiment, the transparent cover, touch panel, and display panel can be bonded together using adhesives such as OCA (Optically Clear Adhesive) and PSA (Pressure Sensitive Adhesive).
[0032] The housing 200 can be used to install various electronic components required for the electronic device 10, and the housing 200 and the display screen 100 can together enclose an installation space 101. For example... Figure 2 As shown, the housing 200 may include a middle frame 210 and a rear housing 220. The display screen 100 may cover one side of the middle frame 210, and the rear housing 220 may cover the opposite side of the middle frame 210, with the three components together forming an installation space 101. The installation space 101 can be divided into a first installation space 1011 formed by the display screen 100 and the middle frame 210, and a second installation space 1012 formed by the middle frame 210 and the rear housing 220. The first installation space 1011 can be used to install electronic devices such as fingerprint sensors, proximity sensors, and infrared sensors to achieve functions such as fingerprint unlocking, automatic screen off, and brightness self-adjustment. The second installation space 1012 can be used to install electronic devices such as microphones, speakers, flashlights, circuit boards, and batteries to achieve functions such as voice communication, audio playback, and lighting.
[0033] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature.
[0034] Furthermore, the materials of the middle frame 210 and the back cover 220 can be glass, metal, or hard plastic, giving them a certain structural strength. Since the middle frame 210 and the back cover 220 are generally directly exposed to the external environment, they can also possess certain wear-resistant, corrosion-resistant, and scratch-resistant properties, or a layer of wear-resistant, corrosion-resistant, and scratch-resistant functional material can be coated on the outer surface of the middle frame 210 and the back cover 220 (i.e., the outer surface of the electronic device 10). Optionally, the back cover 220 can also be designed with films such as textures, gradient colors, photochromic, and electrochromic films to enhance the appearance of the electronic device 10. In this embodiment, all directional indicators (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the figures). If the specific posture changes, the directional indicator will also change accordingly.
[0035] The middle frame 210 can be used to mount electronic components of the electronic device 10, thereby securing the electronic components within the mounting space 101. For example... Figure 2 As shown, the middle frame 210 may include a middle plate 211 and a frame 212. The middle plate 211 can be used to support the camera module 300, so as to fix the camera module 300 within the mounting space 101. For example, the middle plate 211 may be provided with screw holes or adhesive, so that the camera module 300 can be fixed to the middle plate 211 by screwing or bonding. Of course, the middle plate 211 can also be used to support other electronic components required by the electronic device 10. The frame 212 may be formed by extending the sidewall of the middle plate 211 in the thickness direction of the middle plate 211, so that the two opposite sides of the middle frame 210 can form corresponding open structures. The display screen 100 can cover the open structure on one side of the middle frame 210 to form the first mounting space 1011 together with the middle frame 210. The rear shell 220 can cover the open structure on the other opposite side of the middle frame 210 to form the second mounting space 1012 together with the middle frame 210. Meanwhile, the display screen 100 and the back cover 220 can be fixedly connected to the frame 212 by adhesive and / or clips to improve the structural strength of the three.
[0036] Furthermore, the middle plate 211 and the frame 212 can be an integral structure, and the two can be integrally formed by processes such as injection molding, stamping, and hot-dip molding. Of course, the middle plate 211 and the frame 212 can also be two independent structural components, which can be connected by one or a combination of assembly methods such as snap-fit, bonding, and welding. Optionally, the middle frame 210 can also only have the frame 212, while the display screen 100 can be set on one side of the frame 212, and the back cover 220 can be set on the opposite side of the frame 212. In this way, the three can still jointly enclose the installation space 101 to install the camera module 300 and other electronic components of the electronic device 10.
[0037] The camera module 300 can be installed within the mounting space 101, and can receive external light to form an image. Specifically, the camera module 300 can be installed in the first mounting space 1011 for front-facing photography, or in the second mounting space 1012 for rear-facing photography. Of course, both the first mounting space 1011 and the second mounting space 1012 can simultaneously house the camera module 300. It is understood that the aforementioned front-facing photography refers to the camera module 300 receiving light from the side where the display screen 100 is located to form an image, while the rear-facing photography refers to the camera module 300 receiving light from the side where the rear cover 220 is located to form an image.
[0038] like Figure 2 As shown, when the camera module 300 is installed in the first mounting space 1011, the area of the display screen 100 corresponding to the camera module 300 can be provided with a first light-transmitting area 110, allowing light reflected from external objects to pass through the first light-transmitting area 110 and illuminate the camera module 300 for imaging. Correspondingly, when the camera module 300 is installed in the second mounting space 1012, the area of the rear cover 220 corresponding to the camera module 300 can also be provided with a second light-transmitting area 221, allowing light reflected from external objects to pass through the second light-transmitting area 221 and illuminate the camera module 300 for imaging. The first light-transmitting area 110 and the second light-transmitting area 221 can be light-transmitting holes, i.e., corresponding holes are made in the display screen 100 and the rear cover 220 for light transmission. Alternatively, the display screen 100 and the back cover 220 can also be partially transparent to form a first light-transmitting area 110 and a second light-transmitting area 221, as long as external light can pass through the first light-transmitting area 110 and the second light-transmitting area 221 to illuminate the camera module 300.
[0039] Please see Figures 3 to 5 , Figure 3 yes Figure 2 A structural schematic diagram of the central camera module 300. Figure 4 yes Figure 3An exploded view of the central camera module 300. Figure 5 yes Figure 3 A schematic diagram of the cross-sectional structure of the central camera module 300 along line V-V.
[0040] The camera module 300 can be used to receive ambient light for imaging, and it also has an autofocus function. For example... Figures 3 to 5 As shown, the camera module 300 may include: a lens 310, a piezoelectric motor 320, a circuit board 330, a light sensor 340, a mounting base 350, and a filter 360. The lens 310 can be connected to the piezoelectric motor 320, and the piezoelectric motor 320 can drive the lens 310 to move along the optical axis Y, thereby enabling the camera module 300 to autofocus. The circuit board 330 can be disposed on one side of the piezoelectric motor 320 and can be electrically connected to the piezoelectric motor 320. The light sensor 340 can be disposed on the circuit board 330 and positioned opposite the lens 310 along the optical axis Y, and can be used to receive light entering the camera module 300 through the lens 310 for imaging. The mounting base 350 and the filter 360 can be disposed between the piezoelectric motor 320 and the circuit board 330, and the filter 360 can be disposed on the mounting base 350, which can be used to filter stray light to improve the shooting effect of the camera module 300. In this embodiment, the piezoelectric motor 320 also has the advantage of a small lateral dimension, which is beneficial to the miniaturization of the camera module 300, so as to reduce the space occupied by the camera module 300 in the installation space 101.
[0041] Specifically, lens 310 can be used to focus or diverge light rays entering the mounting space 101, thereby changing the propagation path of the incident light rays so that the light rays can illuminate the light sensor 340 for imaging after passing through lens 310. For example... Figure 4 and Figure 5 As shown, lens 310 can be housed within piezoelectric motor 320 and can reciprocate in the optical axis Y direction under the drive of piezoelectric motor 320, thereby realizing the autofocus function of camera module 300. Lens 310 can consist of one or more optical lenses made of glass or transparent plastic, such as freeform lenses, spherical lenses, and aspherical lenses, etc., and the multiple optical lenses can mutually correct and filter light and eliminate aberrations. Simultaneously, lens 310 can be connected to piezoelectric motor 320 by means such as snap-fit, adhesive, or threaded connection to improve the robustness of the connection.
[0042] Please combine Figure 5 See Figures 6 to 7 , Figure 6 yes Figure 4 Exploded view of the structure of medium-voltage electric motor 320. Figure 7 yes Figure 3 A schematic diagram of the cross-sectional structure of the medium-voltage electric motor 320 along line IV-IV.
[0043] The piezoelectric motor 320 can be used to drive the lens 310 to reciprocate in the optical axis Y direction, thereby enabling the camera module 300 to autofocus. For example... Figures 5 to 7 As shown, the piezoelectric motor 320 may include: a frame 321, a carrier 322, a drive member 323, an elastic member 324, a guide member 325, and a housing 326. The frame 321 can be used to mount the carrier 322, the drive member 323, the elastic member 324, and the guide member 325. The carrier 322 can be connected to both the lens 310 and the drive member 323, and can drive the lens 310 to reciprocate in the optical axis direction Y under the drive of the drive member 323. The elastic member 324 provides elastic force to the drive member 323, causing the drive member 323 and the carrier 322 to abut against each other, improving the driving efficiency of the drive member 323. The guide member 325 provides guidance for the reciprocating motion of the carrier 322 in the optical axis direction Y. The housing 326 can be connected to the frame 321, and can be used to protect the frame 321 and the various components mounted on the frame 321, and to restrict the movement of the carrier 322 in the optical axis direction Y. In this embodiment, the frame 321 can accommodate the drive component 323 to reduce the space occupied by the drive component 323 between the frame 321 and the carrier 322, thereby reducing the lateral dimension of the frame 321 and facilitating the miniaturization of the piezoelectric motor 320.
[0044] Please combine Figure 5 and Figure 7 See Figures 8 to 9 , Figure 8 yes Figure 6 A structural diagram of the middle frame 321. Figure 9 yes Figure 3 A schematic diagram of the cross-sectional structure of the medium-voltage electric motor 320 along line VI-VI.
[0045] like Figures 7 to 8As shown, the frame 321 may include a bottom wall 3211 and a side wall 3212 that are connected and perpendicularly arranged. The side wall 3212 may be connected to one side of the bottom wall 3211 in the optical axis direction Y, and the bottom wall 3211 and the side wall 3212 may together enclose a receiving space 3201 for accommodating the carrier 322. Simultaneously, the bottom wall 3211 may also be provided with a light-transmitting hole 3202 communicating with the receiving space 3201, and this light-transmitting hole 3202 may be positioned opposite to the lens 310 in the optical axis direction Y, so that light passing through the lens 310 can illuminate the light sensor 340 through the light-transmitting hole 3202 for imaging. The side wall 3212 may be provided with a through groove 3203 for mounting the drive component 323, and the through groove 3203 may be connected to the receiving space 3201 so as to accommodate the drive component 323, reduce the space occupied by the drive component 323 between the carrier 322 and the side wall 3212, thereby reducing the lateral dimension of the frame 321, which is beneficial to the miniaturization of the piezoelectric motor 320.
[0046] Specifically, the sidewall 3212 may include: a first sidewall 32121, a second sidewall 32122, a third sidewall 32123, a fourth sidewall 32124, and a fifth sidewall 32125. The first sidewall 32121 may be connected to and perpendicular to the second sidewall 32122; the third sidewall 32123 may be connected to and perpendicular to the second sidewall 32122; the fourth sidewall 32124 may be connected to and perpendicular to the third sidewall 32123; and the fifth sidewall 32125 may be connected to and intersect with both the first sidewall 32121 and the fourth sidewall 32124. Meanwhile, the first sidewall 32121, the second sidewall 32122, the third sidewall 32123, the fourth sidewall 32124, and the fifth sidewall 32125 can also be together with the bottom wall 3211 to form the aforementioned receiving space 3201, and the first sidewall 32121 and the fourth sidewall 32124 can also be symmetrically arranged about the thickness direction X of the fifth sidewall 32125. This thickness direction X can also pass through the geometric center of the side of the fifth sidewall 32125 facing the carrier 322. With this arrangement, the sidewall 3212 can be symmetrically arranged about the thickness direction X as a whole, which is beneficial to improving the force balance of the carrier 322 when driven by the driving member 323.
[0047] Furthermore, the first sidewall 32121 and the fourth sidewall 32124 can also be used to mount the elastic element 324, so that the elastic element 324 can provide elastic force to the driving element 323, allowing the driving element 323 to abut against the carrier 322 and improving the driving efficiency of the driving element 323. Specifically, the side of the first sidewall 32121 facing away from the carrier 322 can be provided with a first clearance groove 3204, and the side of the fourth sidewall 32124 facing away from the carrier 322 can be provided with a second clearance groove 3205. Both the first clearance groove 3204 and the second clearance groove 3205 can be used to mount the elastic element 324, thereby accommodating the elastic element 324 and reducing the space occupied by the elastic element 324 between the sidewall 3212 and the outer shell 326. This reduces the lateral dimension of the outer shell 326 and facilitates the miniaturization of the piezoelectric motor 320. Optionally, the design of the first clearance groove 3204 and the second clearance groove 3205 can also be omitted, and the elastic element 324 can also be directly set on the side of the first sidewall 32121 away from the carrier 322, and on the side of the fourth sidewall 32124 away from the carrier 322.
[0048] The second sidewall 32122 and the third sidewall 32123 can also be used to limit the position of the guide member 325, so that the guide member 325 can guide the movement of the carrier 322 in the optical axis direction Y. Specifically, a first holding portion 3206 can be provided on the side of the second sidewall 32122 facing the carrier 322, and the first holding portion 3206 can be disposed adjacent to the first sidewall 32121. A second holding portion 3207 can be provided on the side of the third sidewall 32123 facing the carrier 322, and the second holding portion 3207 can be disposed adjacent to the fourth sidewall 32124. Simultaneously, the first holding portion 3206 and the second holding portion 3207 can also be symmetrically arranged about the thickness direction X, and both the first holding portion 3206 and the second holding portion 3207 can jointly clamp the guide member 325 with the carrier 322, thus limiting the position of the guide member 325 in the receiving space 3201. For example, both the first holding part 3206 and the second holding part 3207 may be provided with a first groove 3208 for accommodating the guide member 325, so as to restrict the position of the guide member 325 in the accommodating space 3201 by means of the first groove 3208.
[0049] The fifth sidewall 32125 may be provided with the aforementioned through groove 3203, and the through groove 3203 may penetrate the fifth sidewall 32125 in the thickness direction X to connect the inside and outside of the receiving space 3201. With this configuration, the driving member 323 can be located at the corner of the sidewall 3212 (the fifth sidewall 32125) to accommodate the driving member 323 using the through groove 3203, thereby reducing the space occupied by the driving member 323 between the carrier 322 and the sidewall 3212, thus achieving the purpose of reducing the lateral dimension of the frame 321, which is beneficial to the miniaturization of the piezoelectric motor 320.
[0050] Optionally, the through-slot 3203 may not be limited to being located on the fifth sidewall 32125; it may also be located on any one of the first sidewall 32121, the second sidewall 32122, the third sidewall 32123, and the fourth sidewall 32124. Furthermore, the through-slot 3203 may not be limited to being located at the corner of the sidewall 3212; it may be located in other areas of the sidewall 3212. With this arrangement, the through-slot 3203 can still accommodate the drive component 323, reducing the space occupied by the drive component 323 between the carrier 322 and the sidewall 3212, thereby reducing the lateral dimension of the frame 321 and facilitating the miniaturization of the piezoelectric motor 320. It is understood that when the through-slot 3203 is located in areas of the sidewall 3212 other than the fifth sidewall 32125, the design of the fifth sidewall 32125 can be eliminated, and in this case, the fourth sidewall 32124 and the first sidewall 32121 can be connected and perpendicularly arranged.
[0051] The carrier 322 can be used to mount the lens 310, thereby driving the lens 310 to reciprocate in the optical axis direction Y, realizing the autofocus function of the camera module 300. Figure 5 and Figure 7 As shown, the carrier 322 can be disposed within the accommodating space 3201 and spaced apart from the side wall 3212 to reduce friction between the carrier 322 and the side wall 3212 during movement. Simultaneously, the carrier 322 can also be provided with a mounting hole 3221 positioned opposite the light-transmitting hole 3202 along the optical axis Y. This mounting hole 3221 can be used to mount the lens 310. For example, the inner wall surface of the mounting hole 3221 can be threaded, and the side surface of the lens 310 can also be provided with corresponding threads, allowing the lens 310 to be fastened within the mounting hole 3221 via threaded engagement, thereby achieving a fixed connection between the carrier 322 and the lens 310.
[0052] To cooperate with the first holding part 3206 and the second holding part 3207, the carrier 322 may also be provided with a third holding part 3222 disposed opposite to the first holding part 3206, and a fourth holding part 3223 disposed opposite to the second holding part 3207. For example... Figure 9As shown, the first holding part 3206 can be configured to clamp the guide member 325 together with the third holding part 3222, and cooperate with the third holding part 3222 to restrict the position of the guide member 325. The second holding part 3207 can be configured to clamp the guide member 325 together with the fourth holding part 3223, and cooperate with the fourth holding part 3223 to restrict the position of the guide member 325. For example, the third holding part 3222 and the fourth holding part 3223 can be provided with a second sliding groove 3224, which can work with the first sliding groove 3208 to receive the guide member 325, thereby restricting the guide member 325 so that the guide member 325 can provide guidance for the movement of the carrier 322 in the optical axis direction Y.
[0053] To prevent the carrier 322 from jamming with the guide member 325 during movement due to tolerances between the frame 321 and the carrier 322, the first slide groove 3208 can be designed as a V-shaped groove, and the second slide groove 3224 can be designed as a U-shaped groove. With this configuration, the guide member 325 can make point contact with the first holding part 3206 and the second holding part 3207, and two-point contact with the third holding part 3222 and the fourth holding part 3223. Optionally, the first slide groove 3208 and the second slide groove 3224 are not limited to being U-shaped or V-shaped grooves; they can be adjusted according to design requirements, and this embodiment does not limit this.
[0054] Please combine Figure 5 and Figure 9 See Figures 10 to 11 , Figure 10 yes Figure 6 A schematic diagram of the structure of the drive component 323. Figure 11 yes Figure 6 A schematic diagram of the structure of the intermediate elastic element 324.
[0055] The driving component 323 can be disposed within the through groove 3203 and abut against the carrier 322. It can vibrate after being energized, thereby driving the carrier 322 to reciprocate along the optical axis Y. For example... Figure 5 and Figure 10 As shown, the driving component 323 may include a vibration part 3231 and a friction part 3232. The vibration part 3231 may be disposed within the through groove 3203 and may also be electrically connected to the circuit board 330, generating micro-amplitude vibrations after being energized. The friction head 3232 may be disposed on the side of the vibration part 3231 facing the carrier 322, and the friction head 3232 may also abut against the carrier 322, generating friction with the carrier 322 under the drive of the vibration part 3231, thereby driving the carrier 322 to move. The specific working principle of the vibration part 3231 can be found in the inverse piezoelectric effect in the prior art, and will not be elaborated upon in this embodiment.
[0056] The vibrating part 3231 can be made of piezoelectric materials such as piezoelectric ceramics or piezoelectric single crystals, and can be a single-layer ceramic or a multi-layer ceramic. For example, the vibrating part 3231 can be made of materials such as lead zirconate titanate-based piezoelectric ceramics, potassium sodium niobate-based piezoelectric ceramics, barium titanate-based piezoelectric ceramics, lead magnesium niobate-lead indium niobate-based piezoelectric single crystals, or textured ceramics. Meanwhile, electrodes and contacts 32311 for electrical connection to the circuit board 330 can also be provided on the outer surface of the vibrating part 3231, so that the circuit board 330 can apply control signals to the vibrating part 3231. For example, three contacts 32311 can be provided on the outer surface of the vibrating part 3231; two contacts 32311 can be located on the side of the vibrating part 3231 facing the carrier 322, and one contact 32311 can be located on the side of the vibrating part 3231 away from the carrier 322.
[0057] The friction head 3232 can be located at the geometric center of the vibrating part 3231 facing the carrier 322, and its shape can be cylindrical, spherical, triangular pyramidal, or other irregular shapes. Simultaneously, the friction head 3232 can be made of wear-resistant materials such as alumina, silicon dioxide, zirconium oxide, carbon fiber, or polyester fiber to improve its service life and maintain the fitting accuracy between the drive component 323 and the carrier 322. Correspondingly, to increase the wear resistance and service life of the carrier 322, a friction plate can be provided on the side of the carrier 322 opposite to the friction head 3232, and the friction plate is made of the same material as the friction head 3232. The friction head 3232 can then abut against the friction plate and rub against it, thereby improving the reliability of the drive component 323.
[0058] The elastic element 324 can be disposed on the side wall 3212, and the elastic element 324 can also abut against the vibrating part 3231 to provide elastic force acting on the vibrating part 3231, so that the friction head 3232 can abut against the carrier 322, thereby improving the tightness of the fit between the friction head 3232 and the carrier 322. Figure 9 and Figure 11As shown, the elastic element 324 may include a first fixing part 3241, a second fixing part 3242, and an elastic part 3243. The first fixing part 3241 may be disposed on the side of the first sidewall 32121 opposite to the carrier 322 and located within the first clearance groove 3204. The second fixing part 3242 may be disposed on the side of the fourth sidewall 32124 opposite to the carrier 322 and located within the second clearance groove 3205. The elastic part 3243 may be disposed on the side of the fifth sidewall 32125 opposite to the carrier 322, and the opposite sides of the elastic part 3243 may be connected to the first fixing part 3241 and the second fixing part 3242 respectively. Simultaneously, the elastic part 3243 may also abut against the side of the vibrating part 3231 opposite to the carrier 322 to provide elastic force acting on the vibrating part 3231, enabling the friction head 3232 to fit tightly with the carrier 322, thereby improving the reliability of the engagement between the driving element 323 and the carrier 322.
[0059] Furthermore, in order to reduce the rigidity of the elastic portion 3243 and improve its deformability, the elastic portion 3243 may also be provided with a notch 32431 that penetrates the elastic portion 3243 in the thickness direction X. At the same time, the notch 32431 may also be connected to a contact 32311 located on the side of the vibrating portion 3231 facing away from the carrier 322, so as to provide the clearance space required for wiring when the contact 32311 is electrically connected to the circuit board 330.
[0060] Please combine Figure 7 and Figure 9 See Figures 12 to 14 , Figure 12 yes Figure 6 Another schematic diagram of the connection structure between the middle frame 321 and the elastic element 324. Figure 13 yes Figure 9 Another enlarged view of point A in the middle. Figure 14 yes Figure 3 A schematic diagram of another cross-section of the medium-voltage electric motor 320 along VI-VI.
[0061] Alternatively, the elastic element 324 may not be configured as described in the aforementioned embodiments. Figure 12 As shown, the elastic element 324 can also consist only of an elastic portion 3243, which can be disposed within the through groove 3203 and connected to the inner wall of the through groove 3203 via a spring force portion 32432. The spring force portion 32432 can be arranged in four positive directions, and can undergo elastic deformation, allowing it to provide elastic force to the vibrating part 3231. This eliminates the need for the first fixing part 3241 and the second fixing part 3242, and the elastic portion 3243 can be integrally formed with the frame 321 using processes such as stamping, reducing assembly steps and production costs.
[0062] Optionally, the elastic element 324 can be a spring or an elastic pad made of elastic materials such as silicone, rubber, and soft plastic, in addition to the spring sheet in the aforementioned embodiments. Figure 13 As shown, the elastic element 324 can be disposed between the vibrating part 3231 and the outer shell 326, and the elastic element 324 can abut against the vibrating part 3231 and the outer shell 326 respectively to provide elastic force on the vibrating part 3231, ensuring the tight fit between the friction head 3232 and the carrier 322.
[0063] Guide member 325 can be disposed within receiving space 3201, and can be used to guide the movement of carrier 322. For example... Figure 7 and Figure 9 As shown, the guide member 325 may include a first guide member 3251 and a second guide member 3252. The first guide member 3251 may be disposed at the corner where the first sidewall 32121 and the second sidewall 32122 meet, and is held by a first holding part 3206 and a third holding part 3222. The second guide member 3252 may be disposed at the corner where the third sidewall 32123 and the fourth sidewall 32124 meet, and is held by a second holding part 3207 and a fourth holding part 3223. Furthermore, the first guide member 3251 and the second guide member 3252 may be symmetrically arranged about the thickness direction X. Thus, by arranging the first guide member 3251 and the second guide member 3252 at two opposite corners of the side wall 3212, and by symmetrically arranging the first guide member 3251 and the second guide member 3252 about the thickness direction X, the first guide member 3251 and the second guide member 3252 can maintain force balance, thereby improving the motion stability of the carrier 322 in the optical axis direction Y.
[0064] Specifically, both the first guide member 3251 and the second guide member 3252 may include a plurality of balls, which can be housed within the space formed by the combination of the first groove 3208 and the second groove 3224. Simultaneously, the plurality of balls can be arranged in a straight line along the optical axis Y, and the diameter of the balls at the ends can be larger than the diameter of the balls in the middle, thereby reducing friction between the carrier 322 and the guide member 325 during movement. Furthermore, the space formed by the combination of the first groove 3208 and the second groove 3224 can be filled with a corresponding lubricant to further reduce friction generated by the carrier 322 during movement. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0065] Optionally, such as Figure 14As shown, in addition to the first guide member 3251 and the second guide member 3252, a third guide member 3253 can also be provided at the corner where the second sidewall 32122 and the third sidewall 32123 meet. Correspondingly, the third sidewall 32123 can be provided with a fifth holding portion 3209, and the fifth holding portion 3209 can be disposed adjacent to the second sidewall 32122. The carrier 322 can be provided with a sixth holding portion 3225 disposed opposite to the fifth holding portion 3209, and the sixth holding portion 3225 and the fifth holding portion 3209 can jointly clamp the third guide member 3253. The structure of the third guide member 3253 and its cooperation with the fifth holding portion 3209 and the sixth holding portion 3225 can be the same as or similar to the first guide member 3251 and the second guide member 3252 in the aforementioned embodiments, and will not be described in detail here.
[0066] Optionally, the first guide 3251, the second guide 3252, and the third guide 3253 are not limited to ball bearings; they can also be sliding rods. For example, the first guide 3251 can be connected to the bottom wall 3211, and the first guide 3251 can pass through the carrier 322, allowing the carrier 322 to slide relative to the first guide 3251 in the optical axis direction Y, thereby guiding the carrier 322.
[0067] like Figure 7 and Figure 9 As shown, the outer casing 326 can be disposed on the side of the bottom wall 3211 facing the carrier 322, and the outer casing 326 can also cover the side wall 3212 to protect the components in the accommodating space 3201. The outer casing 326 may be provided with a clearance hole 3261 opposite to the mounting hole 3221 in the optical axis direction Y, to provide clearance space for the assembly of the lens 310 and the carrier 322. Simultaneously, the outer casing 326 can abut against the first fixing part 3241 and the second fixing part 3242 to clamp the elastic member 324 with the side wall 3212, reducing the probability of the elastic member 324 loosening and improving the stability of the elastic force applied by the elastic member 324 to the vibrating part 3231. Furthermore, the outer casing 326 can also restrict the movement of the carrier 322 in the optical axis direction Y to prevent the carrier 322 from detaching from the accommodating space 3201 during movement.
[0068] Please see Figures 15 to 17 , Figure 15 yes Figure 3 A schematic diagram of another cross-sectional structure of the medium-voltage electric motor 320 along line VI-VI. Figure 16 yes Figure 15 Schematic diagram of the structure of the elastic element 324. Figure 17 yes Figure 3 A schematic diagram of the cross-sectional structure of the medium-voltage electric motor 320 along line VI-VI.
[0069] Optionally, the number of driving components 323 can be multiple, and the driving forces of multiple driving components 323 can be superimposed to reduce the material requirements of the vibrating part 3231, which helps to reduce the production cost of the piezoelectric motor 320. Figure 15 As shown, there can be two driving members 323, and both driving members 323 can be arranged on the first sidewall 32121. Correspondingly, two through slots 3203 can also be provided on the first sidewall 32121, and one through slot 3203 can be provided in the area where the first sidewall 32121 and the second sidewall 32122 are adjacent, and the other through slot 3203 can be provided in the area where the first sidewall 32121 and the fourth sidewall 32124 are adjacent. The two driving members 323 can be respectively provided in the two through slots 3203, and both driving members 323 can abut against the carrier 322. The specific structure of the driving members 323 is the same as or similar to that in the aforementioned embodiments, and will not be described in detail here.
[0070] It is understandable that when the through groove 3203 is set on the first side wall 32121, the design of the fifth side wall 32125 can be cancelled. At this time, the fourth side wall 32124 and the first side wall 32121 can be connected and set perpendicularly, and the first side wall 32121, the second side wall 32122, the third side wall 32123 and the fourth side wall 32124 can still form a receiving space 3201 with the bottom wall 3211.
[0071] Because the position of the driving component 323 changes, the positions of the first guide component 3251 and the second guide component 3252 will also change accordingly in order to maintain the force balance of the guide component 325. For example... Figure 15 As shown, the first guide member 3251 can be disposed on the side of the third sidewall 32123 facing the first sidewall 32121 and opposite to a through groove 3203. The second guide member 3252 can also be disposed on the side of the third sidewall 32123 facing the first sidewall 32121 and opposite to another through groove 3203. With this arrangement, the first guide member 3251 can correspond to one driving member 323, and the second guide member 3252 can correspond to another driving member 323, ensuring the force balance between the two and improving the stability of the carrier 322 during movement.
[0072] Furthermore, in order to restrict the positions of the first guide member 3251 and the second guide member 3252, the positions of the first retaining part 3206, the second retaining part 3207, the third retaining part 3222, and the fourth retaining part 3223 will also change accordingly. For example... Figure 15As shown, the first holding portion 3206 and the second holding portion 3207 can be disposed on the side of the third sidewall 32123 facing the first sidewall 32121. The third holding portion 3222 and the fourth holding portion 3223 can be disposed on the side of the carrier 322 facing the third sidewall 32123, with the third holding portion 3222 opposite to the first holding portion 3206 and the fourth holding portion 3223 opposite to the second holding portion 3207. Simultaneously, the first holding portion 3206 and the third holding portion 3222 can clamp the first guide member 3251, and the second holding portion 3207 and the fourth holding portion 3223 can clamp the second guide member 3252. The specific structure and engagement of the first retaining part 3206, the third retaining part 3222 and the first guide member 3251, as well as the specific structure and engagement of the second retaining part 3207, the fourth retaining part 3223 and the second guide member 3252, can be the same as or similar to the aforementioned embodiments, and will not be described in detail here.
[0073] Because multiple driving elements 323 are used, in order to ensure that all driving elements 323 are subjected to a consistent elastic force and abut against the carrier 322, the multiple driving elements 323 can share the same elastic element 324. For example... Figures 15 to 16 As shown, the elastic element 324 may include two elastic portions 3243 and connecting portions 3244 respectively connecting the two elastic portions 3243. The two elastic portions 3243 may be respectively disposed within two through slots 3203, and the elastic portions 3243 may also be located on the side of the driving element 323 opposite to the carrier 322, and abut against the driving element 323 to provide elastic force acting on the driving element 323, causing the driving element 323 to abut against the carrier 322. The connecting portion 3244 may be disposed on the side of the first sidewall 32121 opposite to the carrier 322, and the opposite sides of the connecting portion 3244 may be respectively connected to the two elastic portions 3243. With this configuration, the two driving elements 323 can share the elastic force provided by the same elastic element 324 to achieve abutment against the carrier 322. Compared to a scheme where each driving element 323 uses an independent elastic element 324 to provide elastic force, this effectively reduces the assembly steps and production costs of the piezoelectric motor 320. The structure of the elastic part 3243 can be the same as or similar to that of the aforementioned embodiments, and will not be described in detail here.
[0074] To reduce the space occupied by the connecting part 3244 between the first sidewall 32121 and the outer shell 326, the first sidewall 32121 can also be provided with a first clearance groove 3204 as in the aforementioned embodiment to accommodate the connecting part 3244, thereby reducing the space occupied by the connecting part 3244 between the first sidewall 32121 and the outer shell 326, thus achieving the purpose of reducing the lateral dimension of the outer shell 326, which is beneficial to the miniaturization of the piezoelectric motor 320. Optionally, in addition to accommodating the connecting part 3244 by providing a first clearance groove 3204, the connecting part 3244 can also be directly embedded in the first sidewall 32121.
[0075] Optionally, the number of driving components 323 is not limited to two, and the driving components 323 are not limited to being disposed on the first sidewall 32121. For example... Figure 17 As shown, the number of driving components 323 can be three, and the three driving components 323 can be respectively disposed on the first side wall 32121, the fourth side wall 32124, and the fifth side wall 32125. Specifically, a through groove 3203 can be provided in the area adjacent to the first side wall 32121 and the second side wall 32122, a through groove 3203 can be provided in the area adjacent to the fourth side wall 32124 and the third side wall 32133, and a through groove 3203 can be provided in the fifth side wall 32125, to accommodate the three driving components 323 respectively.
[0076] Because the arrangement and number of driving components 323 change, the positions of the first guide component 3251 and the second guide component 3252 will also change accordingly in order to maintain the force balance of the guide component 325. For example... Figure 17 As shown, the first guide member 3251 can be disposed on the side of the third sidewall 32123 facing the first sidewall 32121, and is positioned opposite to the through groove 3203 on the first sidewall 32121. The second guide member 3252 can be disposed on the side of the second sidewall 32122 facing the fourth sidewall 32124, and is positioned opposite to the through groove 3203 on the fourth sidewall 32124. With this configuration, the first guide member 3251 can correspond to one driving member 323, and the second guide member 3252 can correspond to another driving member 323. Furthermore, the first guide member 3251 and the second guide member 3252 can be symmetrically arranged about the thickness direction X to ensure the force balance between the two and improve the stability of the carrier 322 during movement. Optionally, the guide member 325 may also be provided with a third guide member 3253, and the third guide member 3253 may be provided at the corner where the second side wall 32122 and the third side wall 32123 meet, and be provided opposite to the drive member 323 located on the fifth side wall 32125.
[0077] Accordingly, to match the number of driving members 323, the elastic member 324 can be provided with three elastic portions 3243. For example... Figure 17As shown, three elastic portions 3243 can be respectively disposed in the three through slots 3203 of the first sidewall 32121, the fourth sidewall 32124, and the fifth sidewall 32125, and are located on the side of the driving member 323 away from the carrier 322, and abut against the driving member 323. There can be two connecting portions 3244. One connecting portion 3244 can be disposed on the side of the first sidewall 32121 away from the carrier 322, and connect to two elastic portions 3243 located on the first sidewall 32121 and the fifth sidewall 32125 respectively. The other connecting portion 3244 can be disposed on the side of the fourth sidewall 32124 away from the carrier 322, and connect to two elastic portions 3243 located on the fourth sidewall 32124 and the fifth sidewall 32125 respectively. With this configuration, the three drive components 323 can still share the elastic force provided by the same elastic element 324 to achieve contact with the carrier 322. Compared with the scheme where each drive component 323 uses an independent elastic element 324 to provide elastic force, this can effectively reduce the assembly process and production cost of the piezoelectric motor 320.
[0078] Optionally, in addition to the above embodiments, the number of driving components 323 can also be four, five or more, and the arrangement of multiple driving components 323 can also be adjusted according to design requirements. As long as multiple driving components 323 can share the elastic force provided by the same elastic component 324 to abut against the carrier 322, this embodiment does not limit this.
[0079] like Figure 4 and Figure 5 As shown, the circuit board 330 can be disposed on the side of the bottom wall 3211 facing away from the carrier 322. It can be electrically connected to the vibrating part 3231 via contacts 32311 on the vibrating part 3231 to apply a control signal to the vibrating part 3231, causing the vibrating part 3231 to generate micro-vibrations. The light sensor 340 can be disposed on the side of the circuit board 330 facing the bottom wall 3211, and the light sensor 340 can also be disposed opposite to the lens 310 in the optical axis direction Y to receive light incident through the lens 310. The light sensor 340 can be a CCD (Charge Coupled Device) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor. For CMOS image sensors, it can be based on RGGB or RYYB.
[0080] A mounting base 350 can be disposed between the circuit board 330 and the bottom wall 3211. The mounting base 350 may have a through hole 351 in the optical axis direction Y, opposite to the lens 310, to allow light to pass through the mounting base 350 and illuminate the light sensor 340. A filter 360 can be disposed on the side of the mounting base 350 facing the bottom wall 3211, and the filter 360 can cover the through hole 351. It can be used to filter stray light to improve the imaging effect of the camera module 300. The filter 360 can be an infrared cut-off filter to block infrared light from passing through. Alternatively, the filter 360 can be a blue glass filter that absorbs infrared light.
[0081] The piezoelectric motor 320 provided in this application embodiment sets the frame 321 as a bottom wall 3211 and a side wall 3212 connected together, and provides a plurality of through slots 3203 on the side wall 3212 that communicate with the receiving space 3201 formed by the bottom wall 3211 and the side wall 3212. This allows a plurality of driving members 323, which are the same number as the number of through slots 3203, to be respectively arranged in the plurality of through slots 3203. The through slots 3203 are used to receive the driving members 323, thereby reducing the space occupied by the driving members 323 between the side wall 3212 and the carrier 322, and thus achieving the purpose of reducing the lateral dimension of the frame 321. Meanwhile, by configuring the elastic element 324 as a plurality of elastic portions 3243, the same number as the driving element 323, and connecting portions 3244 respectively connecting the plurality of elastic portions 3243, and by configuring the plurality of elastic portions 3243 in a one-to-one correspondence with the driving element 323, providing elastic force to the driving element 323 so that the driving element 323 abuts against the carrier 322, thereby enabling the driving element 323 to vibrate after being energized to drive the carrier 322 to move. With this configuration, the plurality of driving elements 323 can share the elastic force provided by the same elastic element 324 to achieve abutment, which helps to reduce the assembly process and production cost of the piezoelectric motor 320.
[0082] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.
Claims
1. A piezoelectric motor for driving the movement of a lens in a camera module, characterized in that, The piezoelectric motor includes: a frame, a carrier, multiple driving components, and an elastic component; The frame is provided with a bottom wall and a side wall that are connected to each other; the bottom wall and the side wall enclose a receiving space; the side wall is provided with a plurality of through slots, the same number as the driving component, which are also connected to the receiving space. The carrier is disposed within the receiving space and is configured to carry the lens; a driving member is disposed within a through slot and abuts against the carrier, and is configured to generate vibration upon energization to drive the carrier to move; The elastic member is provided with a plurality of elastic parts in the same number as the driving member, and connecting parts that are respectively connected to the plurality of elastic parts; one of the elastic parts is provided on the side of the driving member away from the carrier and abuts against the driving member; the connecting part is provided on the side wall.
2. The piezoelectric motor according to claim 1, characterized in that, The connecting part is disposed on the side of the sidewall opposite to the carrier, and the elastic part is located in the through groove.
3. The piezoelectric motor according to claim 2, characterized in that, The piezoelectric motor further includes: a first guide member and a second guide member; the side wall is provided with two through slots; Both the first guide and the second guide are disposed within the accommodating space and are connected to the carrier; the first guide is disposed opposite to one of the through slots, and the second guide is disposed opposite to the other through slot; wherein, both the first guide and the second guide are used to provide guidance for the reciprocating motion of the carrier in the optical axis direction.
4. The piezoelectric motor according to claim 3, characterized in that, The sidewall includes: a first sidewall, a second sidewall connected to and perpendicular to the first sidewall, a third sidewall connected to and perpendicular to the second sidewall, and a fourth sidewall connected to and perpendicular to the first sidewall and the third sidewall respectively; wherein... The bottom wall, together with the first side wall, the second side wall, the third side wall, and the fourth side wall, forms the receiving space; the first side wall is provided with two through slots; the connecting part is provided on the side of the first side wall away from the carrier.
5. The piezoelectric motor according to claim 4, characterized in that, A through groove is provided in the area adjacent to the first sidewall and the second sidewall, and another through groove is provided in the area adjacent to the first sidewall and the fourth sidewall.
6. The piezoelectric motor according to claim 4, characterized in that, The third sidewall is provided with a first holding part and a second holding part on the side facing the carrier. The carrier is provided with a third holding part opposite to the first holding part and a fourth holding part opposite to the second holding part. The first holding part and the third holding part clamp the first guide member, and the second holding part and the fourth holding part clamp the second guide member.
7. The piezoelectric motor according to claim 1, characterized in that, The driving component includes: a vibration part and a friction part; The vibrating part is disposed in the through groove and abuts against the elastic part; the friction part is disposed on the side of the vibrating part facing the carrier and abuts against the carrier; wherein, the vibrating part is further configured to generate vibration after being energized, so that the friction part drives the carrier to reciprocate in the optical axis direction.
8. The piezoelectric motor according to claim 2, characterized in that, The piezoelectric motor also includes: a housing; The outer shell is disposed on the side of the bottom wall facing the carrier and covers the side wall; the connecting part is located between the side wall and the outer shell.
9. The piezoelectric motor according to claim 1, characterized in that, The connecting part is embedded in the side wall.
10. A camera module, characterized in that, The camera module includes: a lens, a circuit board, a light sensor, and a piezoelectric motor as described in any one of claims 1-9; The lens is disposed on the carrier, the circuit board is disposed on the side of the bottom wall away from the carrier, and the circuit board is also electrically connected to the driving component; the light sensor is disposed on the side of the circuit board facing the bottom wall and is disposed opposite to the lens.
11. The camera module according to claim 10, characterized in that, The camera module also includes: a mounting base and a filter; The mounting base is disposed between the bottom wall and the circuit board, and covers the photosensitive sensor; the filter is disposed on the side of the mounting base facing the bottom wall, and is disposed opposite to the lens.
12. An electronic device, characterized in that, The electronic device includes: a display screen, a housing, and a camera module as described in any one of claims 10-11; The display screen is connected to the housing, and the two together form an installation space; the camera module is disposed within the installation space.