Camera module and electronic device

Abstract

Embodiments of the present application relate to the technical field of photography, and provide a camera module and an electronic device, used for solving the problems of low precision and large size in long-travel zoom cameras. The camera module comprises a base, a first lens group assembly, a second lens group assembly, a first piezoelectric actuator, and a second piezoelectric actuator. The macroscopic displacement generated by the microscopic vibration of the first piezoelectric actuator drives the first lens group assembly to move in a first direction, and the macroscopic displacement generated by the microscopic vibration of the second piezoelectric actuator drives the second lens group assembly to move in the first direction, thereby achieving the objectives of zoom and autofocus. The camera module does not require a voice coil motor, thereby alleviating the problems of low control precision and large product size.

Description

A camera module and electronic device

[0001] The present application claims priority to the Chinese Patent Application No. 202411346766.5, filed on September 25, 2024, entitled "A camera module and electronic device", and the Chinese Patent Application No. 202411527479.4, filed on October 29, 2024, entitled "A camera module and electronic device", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the field of camera technology, and in particular to a camera module and electronic device. BACKGROUND

[0003] With the continuous development of electronic device integration technology, photographing and video recording have become one of the commonly used functions of electronic devices, thereby making the application of cameras in electronic devices more and more widespread. Among them, the camera with zoom and autofocus functions can realize long-distance shooting with large focal length and wide-angle shooting with small focal length, thereby meeting the shooting needs of users in various scenes. In order to realize the zoom and autofocus functions, a plurality of voice coil motors are provided in the camera to drive the movement of a plurality of lens groups. However, with the increase in the number of lens groups, the number of voice coil motors also increases accordingly, thereby causing the long-stroke zoom camera to have the problems of low precision and large size. SUMMARY

[0004] The present application provides a camera module and electronic device, which are used to solve the problems of low precision and large size of the long-stroke zoom camera.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] In an aspect of the present application, a camera module is provided. The camera module includes a base, a first lens group assembly, a second lens group assembly, a first piezoelectric driver, and a second piezoelectric driver. The first lens group assembly is movably connected to the base along a first direction, and an optical axis direction of the first lens group assembly is parallel to the first direction. The first lens group assembly and the second lens group assembly are arranged in sequence along the first direction, and the second lens group assembly is movably connected to the base along the first direction, and an optical axis direction of the second lens group assembly is parallel to the first direction. A part (e.g., as a fixed part) of the first piezoelectric driver is connected to the base, and another part (e.g., as a movable part) of the first piezoelectric driver is connected to the first lens group assembly, and the first piezoelectric driver is used to drive the first lens group assembly to move along the first direction. A part (e.g., as a fixed part) of the second piezoelectric driver is connected to the base, and another part (e.g., as a movable part) of the second piezoelectric driver is connected to the second lens group assembly, and the second piezoelectric driver is used to drive the second lens group assembly to move along the first direction.

[0007] In summary, since the other part (e.g., as a movable part) of the first piezoelectric driver is connected to the base, and the other part (e.g., as a movable part) of the first piezoelectric driver is connected to the first lens group assembly, the macroscopic displacement caused by the microscopic vibration of the first piezoelectric driver can be transmitted to the first lens group assembly to drive the first lens group assembly to slide along the first direction, and thus the first lens group assembly can move along the optical axis direction of the first lens group assembly. Similarly, the macroscopic displacement caused by the microscopic vibration of the second piezoelectric driver can be transmitted to the second lens group assembly to drive the second lens group assembly to move along the optical axis direction of the second lens group assembly. By controlling the vibration form of the first piezoelectric driver and the second piezoelectric driver, the stroke of the first lens group assembly and the second lens group assembly can be controlled, thereby achieving the purpose of zooming and focusing. As can be seen from the above, the camera module provided by the present application can drive different lens group assemblies through different piezoelectric drivers in the process of focusing and zooming, so that the voice coil motor does not need to be arranged in the camera module. In this way, on the one hand, the problem of low stroke control precision caused by electromagnetic interference of multiple different voice coil motors when using a moving magnet voice coil motor can be avoided. On the other hand, the problem of low control precision caused by the counterforce of the flexible circuit board when the flexible circuit board needs to follow the movement of the lens group when using a moving coil voice coil motor, and the problem of large size of the entire camera module caused by the large size of the flexible circuit board can also be avoided.

[0008] In an alternative embodiment, the base is provided with a receiving cavity, which has a first sidewall and a second sidewall arranged oppositely and parallel to the first direction. The first piezoelectric driver and the second piezoelectric driver are both arranged on the side of the first sidewall away from the second sidewall. In this way, the power supply of the first piezoelectric driver and the second piezoelectric driver can also be arranged on the side of the first sidewall, thereby facilitating the layout of the internal structure of the camera module and facilitating the miniaturization of the camera module.

[0009] In an alternative embodiment, the first piezoelectric driver comprises a first piezoelectric vibrator and a first movable part. The first piezoelectric vibrator is connected to the base. The first movable part is arranged between the first piezoelectric vibrator and the first sidewall and abuts against the first piezoelectric vibrator. The first movable part is connected to the first lens group assembly and is movably connected to the first sidewall along the first direction. In this case, the first piezoelectric vibrator can serve as a fixed part of the first piezoelectric driver, so that the first piezoelectric driver can be connected to the base through the first piezoelectric vibrator. In the case where the first piezoelectric driver is arranged on the side of the first sidewall away from the second sidewall, the first piezoelectric vibrator is arranged on the side of the first sidewall. The first movable part can serve as a movable part of the first piezoelectric driver, so that the first piezoelectric driver can be connected to the first lens group assembly through the first movable part. In this way, during the vibration of the first piezoelectric vibrator, the first piezoelectric vibrator can transmit the macroscopic displacement caused by the microscopic vibration to the first movable part and drive the first movable part to move relative to the base along the first direction, because the first movable part abuts against the first piezoelectric vibrator. Since the first movable part is connected to the first lens group assembly, the first lens group assembly can be driven to move relative to the base along the first direction under the action of the first movable part. In addition, the first piezoelectric vibrator abuts against the first movable part, and the first movable part is connected to the first lens group assembly. Therefore, the first piezoelectric vibrator and the first lens group assembly are not in direct contact or connection, and are in a decoupled state. In this way, the inclination angle generated by the first piezoelectric vibrator during the vibration process is not easily directly transmitted to the first lens group assembly, so that the first lens group assembly can be stably moved along the first direction, thereby reducing the probability of deviation of the first lens group assembly. The structure of the second piezoelectric driver and the arrangement on the first sidewall are as described above, and will not be described here.

[0010] In an alternative embodiment, the first piezoelectric vibrator comprises a piezoelectric sheet and a contact bump. The piezoelectric sheet is elastically connected to the base. The contact bump is arranged on the side of the piezoelectric sheet facing the first movable part and contacts the first movable part. The contact bump protrudes from the piezoelectric sheet, so that the contact area between the contact bump and the first movable part is small. Therefore, the contact bump serves as the vibration starting point of the entire first piezoelectric vibrator, which facilitates the vibration of the piezoelectric vibrator.

[0011] In an alternative embodiment, the first piezoelectric driver further comprises an elastic member, the elastic member is connected to the first piezoelectric vibrator at a side away from the first movable part, and the elastic member is further connected to the base. Thus, the elastic member can also serve as a fixing member of the first piezoelectric driver. In addition, the elastic member is used to provide a pre-pressing force to the first piezoelectric vibrator against the first movable part, so that the first piezoelectric vibrator can be tightly abutted against the first movable part under the action of the pre-pressing force, thereby facilitating the transmission of the macroscopic displacement generated by the microscopic vibration of the first piezoelectric vibrator to the first movable part.

[0012] In an alternative embodiment, the second piezoelectric driver comprises a second piezoelectric vibrator and a second movable part. The second piezoelectric vibrator is connected to the base. The second movable part is located between the second piezoelectric vibrator and the first side wall, and the second movable part is abutted against the second piezoelectric vibrator. The second movable part is connected to the second lens group assembly, and the second movable part is further movably connected to the first side wall in the first direction. The working principles of the second piezoelectric vibrator and the second movable part are similar to those of the first piezoelectric vibrator and the first movable part, respectively, and will not be repeated here. In addition, the elastic member is further connected to the second piezoelectric vibrator at a side away from the second movable part. At this time, in the case that the first piezoelectric driver and the second piezoelectric driver are located on the same side of the base, the first piezoelectric driver and the second piezoelectric driver can share the same elastic member. In this way, the first piezoelectric driver and the second piezoelectric driver can reduce the number of components in the camera module by sharing the same elastic member, thereby achieving the purpose of simplifying the product structure.

[0013] In an alternative embodiment, in the first direction, both ends of the first slide shaft are connected to the base. The first lens group assembly and the second lens group assembly are both in sliding fit with the first slide shaft. In the first direction, both ends of the second slide shaft are connected to the base, and the first lens group assembly and the second lens group assembly are both in sliding fit with the second slide shaft. In this case, the first lens group assembly driven by the first piezoelectric driver can move along the same slide shaft, for example, along the extension direction of the above-mentioned first slide shaft (or the second slide shaft), as the second lens group assembly driven by the second piezoelectric driver. In this case, the above-mentioned first slide shaft and the second slide shaft can guide the moving direction of the first lens group assembly and the second lens group assembly, so that the multiple lens group, for example, the first lens group assembly and the second lens group assembly, can move coaxially.

[0014] In the related art, when multiple moving-magnet voice coil motors are used to drive multiple mirror groups, magnetic field interference occurs between the multiple voice coil motors, which affects the tilt between different mirror groups. This makes the multiple voice coil motors unable to be located on the same side of the base, so that coaxial sliding of the multiple mirror groups cannot be achieved. The tilt between the mirror groups refers to the relative angle of the center of the lens holder and the preset reference line. By comparison, the camera module provided in the embodiments of the present application does not need to be provided with the voice coil motor. In this way, on the one hand, during zooming or focusing of the camera module, the multiple mirror groups, such as the first mirror group assembly and the second mirror group assembly, can slide coaxially, so that the sliding reference of the first mirror group assembly and the second mirror group assembly is consistent, thereby facilitating improvement of the zooming or focusing accuracy of the entire camera module. On the other hand, when the first mirror group assembly and the second mirror group assembly are coaxial, and the first piezoelectric driver and the second piezoelectric driver are located on the same side, such as the first side wall, the first mirror group assembly and the second mirror group assembly can share a stroke space in the accommodating cavity along the first direction. In this case, at least part of the space for the first mirror group assembly to move in the accommodating cavity along the first direction can also be reused as the space for the second mirror group assembly to move in the accommodating cavity along the first direction, so that compared with the scheme of using independent stroke spaces for the first mirror group assembly and the second mirror group assembly respectively, the size of the camera module along the first direction can be effectively reduced, thereby facilitating miniaturization of the camera module.

[0015] In an optional embodiment, the first sliding shaft and the second sliding shaft are metal shafts. In addition, the camera module further comprises a first magnetic member and a second magnetic member. The first magnetic member is arranged on the first mirror group assembly. The second magnetic member is arranged on the first mirror group assembly. In this way, the first magnetic member and the first sliding shaft that are attracted to each other can make the movement of the first mirror group assembly more stable during sliding along the first sliding shaft. In addition, the second magnetic member and the second sliding shaft are arranged in the same way and have the same technical effects as described above, and will not be described again here.

[0016] In an optional embodiment, the first mirror group component is provided with a first slot, the first slot extends along the first direction, and the first slot is in sliding fit with the first sliding shaft. The first slot is a V-shaped slot. The first mirror group component is provided with a second slot, the second slot extends along the first direction, and the second slot is in sliding fit with the second sliding shaft. The second slot is a U-shaped or L-shaped slot. In this way, on the one hand, in the case where the first slot is in sliding fit with the first sliding shaft, the first sliding shaft abuts against both opposite side walls of the first slot, i.e., the first sliding shaft is in zero fit with both opposite side walls of the first slot. In this way, the sliding direction of the first mirror group component can be limited by the first slot. Thus, the first mirror group component slides along the extension direction of the first sliding shaft, i.e., the first direction, and the probability of deviation of the first mirror group component is reduced. On the other hand, in the case where the second slot is in sliding fit with the second sliding shaft, there can be a gap between the second sliding shaft and at least one side wall of the second slot. The gap can provide a certain space for the second sliding shaft to move on a surface perpendicular to the first direction, so as to reduce the possibility of interference and avoid the phenomenon of jamming when the first mirror group component moves along the first direction.

[0017] In an optional embodiment, the second mirror group component is provided with a fifth slot, the fifth slot extends along the first direction, and the fifth slot is in sliding fit with the first sliding shaft. The shape of the fifth slot is the same as that of the first slot. For example, in the case where the shape of the first slot is a V-shaped slot, the shape of the fifth slot is also a V-shaped slot. In addition, the second mirror group component is provided with a sixth slot. The sixth slot extends along the first direction, and the sixth slot is in sliding fit with the second sliding shaft. The shape of the sixth slot is the same as that of the second slot. For example, in the case where the shape of the second slot is an L-shaped slot or a U-shaped slot, the shape of the sixth slot is also an L-shaped slot or a U-shaped slot. In this way, the shapes of the slots in sliding fit with the same sliding shaft of the first mirror group component and the second mirror group component can be the same, so as to limit the sliding of the first mirror group component and the second mirror group component while avoiding the above-mentioned jamming phenomenon.

[0018] In an optional embodiment, the side of the second mirror group component away from the first sliding shaft and the second sliding shaft can be provided with a magnetic member that is attracted to the first sliding shaft and the second sliding shaft. The arrangement and technical effects of the magnetic member are the same as described above, and will not be described here again.

[0019] In an optional implementation, the camera module further includes a first light path turning mirror, a third lens group assembly, and a driving device. The first lens group assembly is located on the light exit side of the first light path turning mirror. The third lens group assembly is located on the light entrance side of the first light path turning mirror, and the third lens group assembly is slidingly connected to the base along a first direction, and the optical axis direction of the third lens group assembly is perpendicular to the first direction. A part of the driving device (for example, as a part of a fixed element) is connected to the base, and another part of the driving device (for example, as a part of a movable element) is connected to the third lens group assembly. The driving device is used to drive the third lens group assembly to slide along the first direction, so that the third lens group assembly can be driven to move along the first direction to cooperate with other lens groups to realize the switching of the focal length.

[0020] In an optional implementation, a receiving cavity is formed in the base, and the receiving cavity has a first sidewall and a second sidewall which are oppositely arranged and parallel to the first direction. The driving device is a third piezoelectric driver which is located on the side of the second sidewall away from the first sidewall. In this way, the driving device can be located on the opposite sides of the receiving cavity with the first piezoelectric driver (or the second piezoelectric driver), so as to reduce the size of the camera module along the first direction.

[0021] In an optional implementation, the first piezoelectric driver, the second piezoelectric driver, and the driving device can be located on the same side of the base, for example, all located on the side of the first sidewall (or the second sidewall).

[0022] In an optional implementation, the driving device is a voice coil motor which includes a coil and a magnet. The coil is connected to the base, and the magnet is connected to the third lens group assembly. Alternatively, the coil is connected to the third lens group assembly, and the magnet is connected to the base. The magnet or the coil drives the third lens group assembly to move relative to the base along the first direction during movement.

[0023] In an optional implementation, the camera module further includes a first light path turning mirror and a third lens group assembly. The first lens group assembly is located on the light exit side of the first light path turning mirror. The third lens group assembly is located on the light entrance side of the first light path turning mirror, and the third lens group assembly is slidingly connected to the base along a first direction, and the optical axis direction of the third lens group assembly is perpendicular to the first direction. The third lens group assembly is connected to the first piezoelectric driver or the second piezoelectric driver, and the first piezoelectric driver or the second piezoelectric driver is further used to drive the third lens group assembly to slide along the first direction. In this way, in the camera module, a separate driver for driving the third lens group assembly to move along the first direction is not needed, and by sharing the same driver for the third lens group assembly, the first lens group assembly, or the second lens group assembly, the purpose of reducing the components in the camera module can be achieved, so as to simplify the structure of the camera module.

[0024] In an alternative embodiment, the base is provided with a receiving cavity, and the camera module further comprises a first sliding shaft, a second sliding shaft, a third sliding shaft and a fourth sliding shaft. In the first direction, the two ends of the first sliding shaft are connected to the base, and the first lens group assembly and the second lens group assembly are in sliding cooperation with the first sliding shaft. In the first direction, the two ends of the second sliding shaft are connected to the base, and the first lens group assembly and the second lens group assembly are in sliding cooperation with the second sliding shaft. The technical effects of the first sliding shaft and the second sliding shaft are the same as described above, and will not be repeated here. In the first direction, the two ends of the third sliding shaft are connected to the base, the third sliding shaft is located on the side of the first sliding shaft away from the receiving cavity, and the third lens group assembly is in sliding cooperation with the third sliding shaft. In the first direction, the two ends of the fourth sliding shaft are connected to the base, the fourth sliding shaft is located on the side of the second sliding shaft away from the receiving cavity, and the third lens group assembly is in sliding cooperation with the fourth sliding shaft. In this case, the third sliding shaft and the fourth sliding shaft can guide the movement direction of the third lens group assembly, reducing the deviation of the third lens group assembly during sliding. As can be seen from the above, the third sliding shaft can be located above the first sliding shaft, and the fourth sliding shaft can be located above the second sliding shaft. Therefore, the third lens group assembly in sliding cooperation with the third sliding shaft and the fourth sliding shaft can be located above the first lens group assembly and the second lens group assembly. In this way, the third lens group assembly can occupy the space in the first direction, thereby reducing the size of the camera module in the first direction.

[0025] In an alternative embodiment, the camera module further comprises a first sliding shaft and a second sliding shaft. In the first direction, the two ends of the first sliding shaft are connected to the base, and the first lens group assembly, the second lens group assembly and the third lens group assembly are in sliding cooperation with the first sliding shaft. In the first direction, the two ends of the second sliding shaft are connected to the base, and the first lens group assembly, the second lens group assembly and the third lens group assembly are in sliding cooperation with the second sliding shaft. In this way, the first lens group assembly, the second lens group assembly and the third lens group assembly can move along the same sliding shaft, for example, along the extension direction of the first sliding shaft (or the second sliding shaft), thereby reducing the number of sliding shafts and achieving the purpose of simplifying the structure of the camera module.

[0026] In an alternative embodiment, the accommodating cavity is provided with a third slot and a fourth slot on the side wall facing the first movable part. The third slot and the fourth slot extend along the first direction and are arranged side by side. The first piezoelectric actuator further comprises a first slider and a second slider. The first slider is arranged on the side of the first movable part facing the accommodating cavity, and is in sliding connection with the third slot. The first slider is connected with the first movable part. The second slider is arranged on the side of the first movable part facing the accommodating cavity, and is in sliding connection with the fourth slot. The second slider is connected with the first movable part. In this case, the first slider can slide in the third slot and the second slider can slide in the fourth slot during the reciprocating movement of the first movable part along the first direction. The third slot and the fourth slot can guide the movement direction of the first slider and the second slider, respectively. Since the extending direction of the third slot and the fourth slot is parallel to the first direction, the first slider and the second slider slide along the first direction. On this basis, since the first slider is connected with the first movable part and the second slider is in contact with the first movable part, the first movable part can be driven to reciprocate along the first direction relative to the base by the first slider and the second slider.

[0027] In an alternative embodiment, the accommodating cavity is provided with a third slot and a fourth slot on the side wall facing the first movable part. The third slot and the fourth slot extend along the first direction and are arranged side by side. The first piezoelectric actuator further comprises a first slider and a second slider. The first slider is arranged on the side of the first movable part facing the accommodating cavity, and is in sliding connection with the third slot. The first slider is connected with the first movable part. The second slider is arranged on the side of the first movable part facing the accommodating cavity, and is in sliding connection with the fourth slot. The second slider is connected with the first movable part. In this case, the first slider can slide in the third slot and the second slider can slide in the fourth slot during the reciprocating movement of the first movable part along the first direction. The third slot and the fourth slot can guide the movement direction of the first slider and the second slider, respectively. Since the extending direction of the third slot and the fourth slot is parallel to the first direction, the first slider and the second slider slide along the first direction. On this basis, since the first slider is connected with the first movable part and the second slider is in contact with the first movable part, the first movable part can be driven to reciprocate along the first direction relative to the base by the first slider and the second slider.

[0028] In an alternative embodiment, the third groove extends along the first direction, and the third groove is a V-shaped groove. The fourth groove extends along the first direction, and the fourth groove is a U-shaped or L-shaped groove. In this way, on the one hand, when the first ball is located in the third groove, the first ball abuts against both opposite side walls of the third groove, i.e., the first ball is in a zero-fit state with both opposite side walls of the third groove. In this way, the third groove can limit the rolling direction of the first ball. Thus, the first ball rolls along the extension direction of the third groove, i.e., the first direction, reducing the probability of deviation of the first ball, and further reducing the probability of deviation of the first movable part when the first movable part moves along the first direction. On the other hand, when the second ball is located in the fourth groove, there can be a gap between the second ball and at least one side wall of the fourth groove. The gap can provide the second ball with a certain space for movement on a surface perpendicular to the first direction, reducing the possibility of interference and avoiding the phenomenon of jamming when the first movable part moves along the first direction.

[0029] In an alternative embodiment, the first piezoelectric driver further comprises a third magnetic member and a fourth magnetic member. The third magnetic member is located between the first movable part and the first mirror group assembly, and the third magnetic member is connected to the first movable part. The fourth magnetic member is located between the first movable part and the first mirror group assembly, and the fourth magnetic member is connected to the first mirror group assembly. The third magnetic member and the fourth magnetic member are arranged in sequence along the first direction, and the third magnetic member and the fourth magnetic member are magnetically attracted to each other. The first movable part is indirectly connected to the first mirror group assembly through the third magnetic member and the fourth magnetic member. In this way, along the first direction, the first movable part can be more closely connected to the first mirror group assembly through the third magnetic member and the fourth magnetic member. In this case, when the first piezoelectric vibrator converts micro-vibration into macro-displacement along the first direction, the displacement can be effectively transmitted to the first mirror group assembly through the closely adsorbed third magnetic member and fourth magnetic member, thereby improving the efficiency and precision of controlling the movement of the first mirror group assembly along the first direction.

[0030] In an alternative embodiment, the camera module further comprises a fifth magnetic member, a sixth magnetic member, and at least three first displacement detectors. The fifth magnetic member is connected to the first lens group assembly and is configured to generate a magnetic field. The sixth magnetic member is connected to the second lens group assembly and is configured to generate a magnetic field. The at least three first displacement detectors are connected to the base. In the first direction, the at least three first displacement detectors are arranged at intervals within the stroke range of the first lens group assembly and the second lens group assembly. The at least three first displacement detectors are configured to jointly detect the magnetic field generated by the fifth magnetic member and the sixth magnetic member. In this way, when the displacement of the first lens group assembly and the second lens group assembly is a long stroke (e.g., greater than 10 mm), the at least three first displacement detectors arranged at intervals within the stroke range of the first lens group assembly and the second lens group assembly can jointly detect the change in the magnetic field, avoiding a detection blind area in the middle region of the long stroke, thereby improving the displacement control accuracy of the first lens group assembly and the second lens group assembly.

[0031] In an alternative embodiment, the camera module can comprise two displacement detectors (e.g., Hall sensors or TMR sensors) connected to the first lens group assembly and the second lens group assembly, respectively, and a magnetic member (e.g., a magnetic grid and a magnet) connected to the base. The working principle of the displacement sensor and the magnetic member is as described above and will not be repeated here.

[0032] In an alternative embodiment, the camera module further comprises a seventh magnetic member and two second displacement detectors, which can be used as components for displacement detection of the third lens group assembly. The seventh magnetic member is connected to the third lens group assembly and is configured to generate a magnetic field. The two second displacement detectors are connected to the base. The two second displacement detectors are arranged at intervals at the two ends of the stroke range of the third lens group assembly, and are configured to detect the magnetic field generated by the seventh magnetic member. In this way, when one of the two second displacement detectors detects the magnetic field strength, the other second displacement detector can assist in detecting the magnetic field strength, thereby improving the accuracy of displacement detection. No displacement detector needs to be arranged in the middle of the stroke range of the third lens group assembly, thereby achieving the purpose of simplifying the structure and reducing the cost.

[0033] In an alternative embodiment, the camera module can comprise a displacement detector (e.g., a Hall sensor or a TMR sensor) connected to the third lens group assembly, and a magnetic member (e.g., a magnetic grid and a magnet) connected to the base. The working principle of the displacement sensor and the magnetic member is as described above and will not be repeated here.

[0034] In another aspect of the embodiments of the present application, an electronic device is provided, which includes a housing and any one of the camera modules as described above. The camera module is arranged in the housing. The electronic device has the same technical effects as the camera modules provided in the foregoing embodiments, which will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0035] FIG. 1 is a structural schematic diagram of an electronic device provided in the embodiments of the present application;

[0036] FIG. 2 is a structural schematic diagram of a camera module in FIG. 1;

[0037] FIG. 3 is an exploded structural schematic diagram of the camera module in FIG. 2;

[0038] FIG. 4 is a structural schematic diagram of an optical system in FIG. 2;

[0039] FIG. 5 is a sectional view obtained by cutting along the dashed line A1-A2 in FIG. 4;

[0040] FIG. 6 is a structural schematic diagram of a camera module provided in the embodiments of the present application;

[0041] FIG. 7 is a sliding schematic diagram of a lens group assembly provided in the embodiments of the present application;

[0042] FIG. 8 is a sectional view obtained by cutting along the dashed line A3-A4 in FIG. 7;

[0043] FIG. 9 is a structural schematic diagram of another camera module provided in the embodiments of the present application;

[0044] FIG. 10 is a sectional view obtained by cutting along the dashed line A5-A6 in FIG. 6;

[0045] FIG. 11 is a schematic diagram obtained in the direction C in FIG. 9;

[0046] FIG. 12 is another schematic diagram obtained in the direction C in FIG. 9;

[0047] FIG. 13 is a structural schematic diagram of still another camera module provided in the embodiments of the present application;

[0048] FIG. 14 is another sliding schematic diagram of a lens group assembly provided in the embodiments of the present application;

[0049] FIG. 15 is a sectional view obtained by cutting along the dashed line A7-A8 in FIG. 14;

[0050] FIG. 16 is another sectional view obtained by cutting along the dashed line A7-A8 in FIG. 14;

[0051] FIG. 17 is a schematic diagram of an optical system provided in the embodiments of the present application;

[0052] FIG. 18 is a structural schematic diagram of still another camera module according to an embodiment of the present application;

[0053] FIG. 19 is a structural schematic diagram of still another camera module according to an embodiment of the present application;

[0054] FIG. 20 is a sliding schematic diagram of still another lens group assembly according to an embodiment of the present application;

[0055] FIG. 21 is a structural schematic diagram of still another camera module according to an embodiment of the present application;

[0056] FIG. 22 is a sliding schematic diagram of still another lens group assembly according to an embodiment of the present application;

[0057] FIG. 23 is a sliding schematic diagram of still another lens group assembly according to an embodiment of the present application;

[0058] FIG. 24 is a structural schematic diagram of still another camera module according to an embodiment of the present application;

[0059] FIG. 25 is a schematic diagram obtained along the direction E in FIG. 24;

[0060] FIG. 26 is another schematic diagram obtained along the direction E in FIG. 24;

[0061] FIG. 27 is still another schematic diagram obtained along the direction E in FIG. 24;

[0062] FIG. 28 is still another schematic diagram obtained along the direction E in FIG. 24.

[0063] Label: 01-electronic device; 02-display screen; 03-back shell; 04-middle frame; 05-circuit board; 06-opening; 07-housing; 10-camera module; 11-housing; 12-optical system; 13-filter; 14-image sensor; 15-base; 101-accommodation cavity; M1-first side wall; M2-second side wall; 21-first mirror group assembly; 22-second mirror group assembly; 23-first light path turning mirror; 24-second light path turning mirror; 200-optical lens; 31-first piezoelectric driver; 32-second piezoelectric driver; 33-elastic member; 311a-first piezoelectric vibrator; 312a-first movable part; 311b-second piezoelectric vibrator; 312b-second movable part; 3110-piezoelectric sheet; 3111-contact bump; 43-third magnetic member; 44-fourth magnetic member; 3112-first ball; 3113-second ball; 503-third slot; 504-fourth slot; 3100-groove; 3114-first slider; 3115-second slider; 61-first sliding shaft; 62-second sliding shaft; 611-first magnetic member; 612-second magnetic member; 211-first slot; 212-second slot; 213-fifth slot; 214-sixth slot; 25-third mirror group assembly; 34-driving device; 311c-third piezoelectric vibrator; 312c-third movable part; 63-third sliding shaft; 64-fourth sliding shaft; 331-magnet; 332-coil; 201-fifth magnetic member; 202-first displacement detector; 203-sixth magnetic member; 301-seventh magnetic member; 302-second displacement detector. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application.

[0065] Hereinafter, the terms "first", "second", and the like are only used for description convenience, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0066] In addition, in the embodiments of the present application, the orientation terms such as "upper", "lower", "lateral", "longitudinal", "horizontal", and "vertical" can include but not limited to the orientation defined by the relative position of the components in the drawings. It should be understood that these directional terms can be relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the position of the components in the drawings.

[0067] In the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, the "connection" can be a fixed mechanical connection, or a detachable mechanical connection, or integrated; or the "connection" can be direct connection, or indirect connection through an intermediate medium.

[0068] In addition, unless otherwise explicitly specified and limited, the term "electrical connection" should be understood broadly, for example, the "electrical connection" can be direct electrical connection, for example, physical contact and electrical conduction between two components, or can be understood as electrical connection between different components through a physical line that can transmit electrical signals, such as copper foil or wire on a printed circuit board (PCB), to transmit electrical signals; or the "electrical connection" can be indirect electrical connection between two components through an intermediate medium; or the "electrical connection" can be electrical connection between two components through a non-contact / empty space, for example, electrical connection between two components through capacitive coupling to transmit electrical signals.

[0069] In the embodiments of the present application, "vertical" and "parallel" respectively represent approximately vertical and approximately parallel within a certain error range, which can be a range of less than or equal to 5°, 8° or 10° of deviation angle with respect to absolute vertical and absolute parallel, which is not limited here.

[0070] In the embodiments of the present application, the orientation terms such as "up", "down", "left", "right" and the like can include but are not limited to the orientation defined relative to the orientation of the components shown in the drawings, and it should be understood that these directional terms can be relative concepts, which are used for relative description and clarification, and can change accordingly according to the change of the orientation of the components shown in the drawings.

[0071] In the drawings of the embodiments of the present application, components are represented by arrows; parts are represented by arrows; and open structures such as openings, holes and the like are represented by arrows with wavy lines at the ends.

[0072] The electronic device provided in the embodiments of the present application can have a display function. The electronic device can be applied to various communication systems or communication protocols, such as a blue-tooth (BT) communication technology, a global positioning system (GPS) communication technology, a global system of mobile communication (GSM) communication technology, a wireless fidelity (WiFi) communication technology, a wideband code division multiple access wireless (WCDMA) communication technology, a long term evolution (LTE), a 5G communication technology, and other future communication technologies. The electronic device in the embodiments of the present application can be a mobile phone, a pad, a notebook computer, a camera, a smart home, a smart wearable device (for example, a smart watch, a smart bracelet, smart glasses, a smart helmet), a virtual reality (VR) electronic device, an augmented reality (AR) electronic device, and the like. The electronic device can also be a handheld device, a computing device, or other processing device connected to a wireless modem having a wireless communication function, a vehicle-mounted device, an electronic device in a 5G network, or an electronic device in a future evolved public land mobile network (PLMN), and the like, which are not limited in the embodiments of the present application.

[0073] In some embodiments, in order to enable the above-mentioned electronic device to realize the display function, as shown in FIG. 1, the electronic device 01 provided in the embodiments of the present application can include a display screen 02, a back cover 03 located at the back of the display screen 02 (opposite to the display surface of the display screen 02), and a middle frame 04 located between the display screen 02 and the back cover 03. The middle frame 04 can support the display screen 02.

[0074] The display screen 02 can be a liquid crystal display (LCD), or an organic light emitting diode (OLED) display screen, or a micro or mini light-emitting diode display screen, or a quantum dot light emitting diode (QLED) display screen, and the like, which are not limited in the embodiments of the present application.

[0075] The electronic device 01 can further include a circuit board 05 electrically connected to the display screen 02, and the circuit board 05 is provided with a processor electrically connected to the display screen 02. The back cover 03 is buckled on the middle frame 04, so that the mounting space is formed between the back cover 03 and the middle frame 04, and the circuit board 05, the processor, the battery and other devices are accommodated in the mounting space. The processor can provide display data to the display screen 02 to drive the display screen 02 to display images.

[0076] For example, the processor can include one or more processing units, such as an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units can be independent devices or integrated into one or more processors.

[0077] In addition, the electronic device 01 can further include a gyro sensor, a hall sensor, an external memory interface, an internal memory, a universal serial bus (USB) interface, a charging management module, a power management module, a battery, an antenna, a mobile communication module, a wireless communication module, an audio module, a speaker, a receiver, a microphone, an earphone interface, a sensor module, a key, and a camera, etc. electrically connected to the processor. The sensor module can include a pressure sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, and a bone conduction sensor, etc.

[0078] In some embodiments, in order to enable the electronic device 01 to realize the photographing function, the electronic device 01 provided by the embodiments of the present application can further include a camera module 10 as shown in FIG. 1. The rear shell 03 and the middle frame 04 can constitute the shell 07 of the electronic device 01, and the camera module 10 can be arranged in the shell 07. The camera module 10 can be a front camera module or a rear camera module. The front camera module can be arranged on the back of the display screen 02 shown in FIG. 1, and the photosensitive surface of the front camera module is located on the side of the display surface of the display screen 02. The rear camera module can be arranged on the side of the middle frame 04 away from the display screen 02, i.e. in the mounting space formed between the middle frame 04 and the rear shell 03, and the photosensitive surface of the rear camera module is located on the back of the electronic device 01.

[0079] For example, taking the rear camera module as an example, the rear shell 03 is provided with an opening 06 for exposing part of the camera module 10, and the opening 06 is used to expose the light entrance side of the camera module 10. The camera module 10 can be one or more of a standard camera module, a long-focus camera module, an ultra-long-focus camera module, a wide-angle camera module, and an ultra-wide-angle camera module. The number of camera modules 10 in the electronic device 01 is not limited in the present application.

[0080] The structure of the camera module 10 will be described below by taking the camera module 10 as a periscopic camera module as an example. In some embodiments of the present application, as shown in FIG. 2, the camera module 10 can include a housing 11, an optical system 12, a filter 13, and an image sensor 14. At least part of the optical system 12 can be arranged in the housing 11.

[0081] For the convenience of description, XYZ coordinate axes are established in the drawings, wherein the Z direction can be perpendicular to the light entrance side of the camera module 10 (i.e. the side for receiving the incident light of the solid arrow shown in FIG. 2), and the XY plane formed by the X direction and the Y direction can be perpendicular to the surface (i.e. the light entrance surface) where the light entrance side of the camera module 10 is located. For the convenience of description, the X direction is taken as the first direction X.

[0082] Based on this, in the photographing process, the external light enters the housing 11 along the direction shown by the solid arrow in FIG. 2, and then is transmitted to the image sensor 14 by the optical system 12 to achieve the purpose of imaging. For example, the optical system 12 can include a plurality of mirror group components, and the mirror group components can include one or more optical lenses. The optical lenses can be convex lenses or concave lenses, so that the optical system 12 with the optical lenses can use the refraction principle of the optical lenses to converge the light of the photographed object to the focal plane of the camera module 10 for imaging.

[0083] In addition, the image sensor 14 can be arranged at the focal plane of the camera module 10, so as to receive the light image of the object from the optical system 12, and to perform photoelectric conversion to generate image information. For example, the image sensor 14 can be a charge coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS). The image sensor 14 can include a plurality of light sensing units (not shown in the figure), each of which converts the received light quantity into an electrical signal in a corresponding proportional relationship with the light quantity.

[0084] On this basis, in order to improve the effective resolution and color restoration of the image sensor 14, the above-mentioned filter 13 can be arranged on the light receiving side of the image sensor 14. For example, the above-mentioned filter 13 can be an infrared filter 13, which can filter out infrared light in ambient light and transmit visible light. Alternatively, for another example, the filter 13 can be a double-bandpass filter, which can select a wavelength range in two regions of ambient light to pass through, such as visible light and infrared light, or visible light and ultraviolet light, or ultraviolet light and infrared light, etc.

[0085] As described above, as shown in FIG. 3, the optical system 12 can include a plurality of mirror group assemblies, for example, a first mirror group assembly 21 and a second mirror group assembly 22, which can perform certain processing on the received light, such as aberration correction, achromatization, etc.

[0086] Continuing as shown in FIG. 3, the camera module 10 further includes a base 15, which has a receiving cavity 101 formed therein. Part of the first mirror group assembly 21 and part of the second mirror group assembly 22 are located in the receiving cavity 101, and the first mirror group assembly 21 and the second mirror group assembly 22 can be arranged in sequence along a first direction X. Among them, the direction of the optical axis O1-O2 of the first mirror group assembly 21 can be approximately or completely overlapped with the direction of the optical axis (not labeled in FIG. 3) of the second mirror group assembly 22. In addition, the direction of the optical axis O1-O2 of the first mirror group assembly 21 and the direction of the optical axis of the second mirror group assembly 22 can be parallel to the first direction X.

[0087] On this basis, the first mirror group assembly 21 is movably connected (for example, slidingly or rollingly) with the base 15 along the first direction X, and the second mirror group assembly 22 is movably connected (for example, slidingly or rollingly) with the base 15 along the first direction X. In the process of moving (reciprocating) the first mirror group assembly 21 and the second mirror group assembly 22 along the first direction X, the focal length of the camera module 10 can be changed by changing the distance between the optical lenses, so as to achieve the purposes of optical zooming and auto focusing (AF). In this way, the camera module 10 can capture objects at different distances through optical zooming and focusing.

[0088] In the above, optical zooming refers to zooming by relying on the structure of an optical lens, which is caused by changes in the positions of the optical lens or mirror group, the object, and the focal point. The focal length refers to the vertical distance from the optical center of the optical lens or mirror group to the focal point (or focal plane) when an object at infinity passes through the optical lens or mirror group to form a clear image on the focal plane. The vertical distance from the optical center to the focal point can be changed through optical zooming. For example, the camera module 10 provided in the embodiments of the present application can have a zooming range of, for example, ultra-wide-angle focal length (focal length less than 21 mm), wide-angle focal length (focal length of 21 mm-35 mm), standard focal length (focal length of 35 mm-70 mm), medium-long focal length (focal length of 70 mm-135 mm), long focal length (focal length of 135-500 mm), and the like.

[0089] In addition, the direction of the optical axis O1-O2 can refer to the direction of the optical transmission of the first mirror group assembly 21. For example, for a symmetrical first mirror group assembly 21, the optical axis O1-O2 can coincide with the optical rotation center line of the first mirror group assembly 21. If the light ray coincides with the optical axis, the light will be transmitted along the optical axis in the optical system. The optical axis of the second mirror group assembly 22 can be obtained in the same way, which will not be described here.

[0090] The above is an example of taking the optical system 12 as including two mirror group assemblies (i.e., the first mirror group assembly 21 and the second mirror group assembly 22) for example. The number of mirror group assemblies is not limited in the present application. For example, the optical system 12 can include three or more mirror group assemblies. In this case, different mirror group assemblies are arranged so that the focal lengths obtained by different mirror group assemblies at different positions are more diversified, thereby increasing the degree of freedom of the camera module in the process of zooming and focusing.

[0091] As shown in FIG. 4, the optical system 12 can further include a first light path turning mirror 23 and a second light path turning mirror 24. The light path turning mirror can change the propagation path of the light. For example, the light originally propagating in the vertical direction is changed to propagate in the horizontal direction, or the light originally propagating in the horizontal direction is changed to propagate in the vertical direction. The light path turning mirror can be a prism (for example, a right-angle prism or a three-prism), or a mirror. The first mirror group assembly 21 and the second mirror group assembly 22 can be located on the light exit side of the first light path turning mirror 23, and the first mirror group assembly 21 and the second mirror group assembly 22 can be located on the light entrance side of the second light path turning mirror 24. In this case, the surface on which the light entrance side of the first light path turning mirror 23 is located can serve as the light entrance side of the camera module, for receiving external light.

[0092] Based on this, as shown in FIG. 5 (a cross-sectional view obtained by cutting along the dashed line A1-A2 in FIG. 4), the external light can be incident on the first light path turning mirror 23 along the solid arrow direction, and under the reflection of the first light path turning mirror 23, the transmission direction of the light can be changed, so that the light can be incident on the first mirror group assembly 21 and the second mirror group assembly 22 in the first direction X in sequence. For example, any one of the first mirror group assembly 21 and the second mirror group assembly 22 can include at least one optical lens 200. Under the optical effect of the optical lens 200 of the first mirror group assembly 21 and the second mirror group assembly 22, the light can be incident on the second light path turning mirror 24, and under the reflection of the second light path turning mirror 24, the light can be projected onto the optical filter 13 and the image sensor 14.

[0093] Alternatively, for another example, any one of the first mirror group assembly 21 and the second mirror group assembly 22 can further include a lens holder (not shown in FIG. 5) for carrying the optical lens 200. In this case, the optical lens 200 in any one of the first mirror group assembly 21 and the second mirror group assembly 22 can be located in the accommodating cavity 101 in FIG. 3. In addition, part of the lens holder in the mirror group assembly can be located in the accommodating cavity 101, and the other part can be located outside the accommodating cavity 101.

[0094] In this case, the camera module 10 provided by the embodiment of the present application can change the propagation path of the incident light through the first light path turning mirror 23 and the second light path turning mirror 24 as shown in FIG. 5, thereby reducing the requirement for the height (dimension in the Z direction) of the camera module, and further enabling the camera module 10 to be arranged laterally in the body of the electronic device 01 (as shown in FIG. 1) in the first direction X, thereby effectively reducing the thickness of the entire electronic device 01.

[0095] The above is an example in which the optical system 12 includes two light path turning mirrors, such as the first light path turning mirror 23 and the second light path turning mirror 24. The number of light path turning mirrors in the optical system 12 is not limited in the present application. For example, in another embodiment of the present application, the second light path turning mirror 24 can not be provided in the optical system 12 by changing the positions of the optical filter 13 and the image sensor 14 in FIG. 5. Alternatively, the optical system 12 can include three or more light path turning mirrors as needed.

[0096] In addition, the camera module 10 described above can further include an optical image stabilization (OIS) device to avoid or reduce the instrument shaking phenomenon in the process of capturing an optical signal, so as to improve the imaging quality. For example, the OIS device can be arranged on the side of the image sensor 14 in FIG. 5 away from the optical filter 13. The structure and arrangement position of the OIS device are not limited in the present application.

[0097] As described above, the focal length of the camera module 10 can be changed during the movement of the first lens group assembly 21 and the second lens group assembly 22 along the first direction X. In this case, in order to drive the first lens group assembly 21 and the second lens group assembly 22 to move along the first direction X, the camera module 10 can further include a first piezoelectric driver 31 and a second piezoelectric driver 32 in some embodiments of the present application, as shown in FIG. 6. The first piezoelectric driver 31 and the second piezoelectric driver 32 can use the inverse piezoelectric effect of piezoelectric materials to realize the conversion of electrical energy into mechanical energy.

[0098] The inverse piezoelectric effect refers to that when an electric field is applied in the polarization direction of a dielectric, the dielectric will produce mechanical deformation or mechanical stress in a certain direction. When the applied electric field is removed, the deformation or stress also disappears. By applying an alternating electric field to the dielectric, the dielectric can produce continuous deformation, which can be manifested as vibration in a macroscopic sense.

[0099] In addition, a part (for example, as a fixed part) of the first piezoelectric driver 31 can be connected with the base 15, and another part (for example, as a movable part) of the first piezoelectric driver 31 can be connected with the first lens group assembly 21. The first piezoelectric driver 31 is used to drive the first lens group assembly 21 to move along the first direction X. In addition, a part (for example, as a fixed part) of the second piezoelectric driver 32 can be elastically connected with the base 15, and another part (for example, as a movable part) of the second piezoelectric driver 32 can be connected with the second lens group assembly 22. The second piezoelectric driver 32 is used to drive the second lens group assembly 22 to move along the first direction X.

[0100] In some embodiments of the present application, the camera module 10 can include balls arranged between the first or second lens group assembly 21, 22 and the base 15 to enable the first or second lens group assembly 21, 22 to be connected to the base 15 in a rolling manner. Alternatively, in some other embodiments of the present application, the camera module 10 can include a sliding shaft connected to the base 15, and the first or second lens group assembly 21, 22 can be connected to the base 15 in a sliding manner via the sliding shaft. For the sake of convenience, the following description will be given by way of example with the first or second lens group assembly 21, 22 connected to the base 15 in a sliding manner via the sliding shaft, and the specific structure of the sliding shaft will be described in detail in the following embodiments.

[0101] In this case, as shown in FIG. 6, since a part of the first piezoelectric driver 31 (e.g., the part as the fixed member) can be connected to the base 15 and another part of the first piezoelectric driver 31 (e.g., the part as the movable member) can be connected to the first lens group assembly 21, the first piezoelectric driver 31 can generate vibration according to the inverse piezoelectric effect and transmit the macroscopic displacement generated by the microscopic vibration to the first lens group assembly 21 to drive the first lens group assembly 21 to move along the first direction X (i.e., the direction of the optical axis O1-O2 of the first lens group assembly 21). In addition, as described above, the first lens group assembly 21 is connected to the base 15 in a sliding manner along the first direction X. Therefore, under the action of the first piezoelectric driver 31, the first lens group assembly can move along the direction of the optical axis O1-O2 of the first lens group assembly 21 in the accommodating cavity 101.

[0102] Similarly, the vibration generated by the second piezoelectric driver 32 can be transmitted to the second lens group assembly 22 to drive the second lens group assembly 22 to move along the direction of the optical axis of the second lens group assembly (coinciding with the direction of the optical axis O1-O2 of the first lens group assembly 21) in the accommodating cavity 101. In this way, by controlling the vibration form (e.g., the amplitude, frequency, and direction, etc.) of the first and second piezoelectric drivers 31, 32, the direction and stroke of the first and second lens group assemblies 21, 22 moving along the first direction X in the accommodating cavity 101 can be controlled, so as to achieve the purposes of zooming and auto-focusing.

[0103] On this basis, as described above, the camera module 10 provided by the present application can drive different lens group assemblies by different piezoelectric drivers during the process of achieving auto-focusing and zooming, i.e., the first and second piezoelectric drivers 31, 32 are used to drive the first and second lens group assemblies 21, 22 to move in the accommodating cavity 101, respectively. Therefore, the camera module 10 does not need to be provided with a voice coil motor (VCM).

[0104] The voice coil motor is a device that can convert electrical energy into mechanical energy, and includes a magnet and a coil. The voice coil motor generates mechanical energy by using the action of the magnetic field of the magnet and the magnetic field generated by the current-carrying coil conductor on the magnetic pole. Specifically, when the current-carrying coil passes through the magnetic field generated by the magnet, an action force perpendicular to the magnetic field is generated. The size of the action force can depend on the strength of the magnetic field and the current flowing through the coil. The voice coil motor can be divided into a moving coil type (the coil is connected to the driven part) voice coil motor and a moving magnet type (the magnet is connected to the driven part) voice coil motor.

[0105] Based on this, on the one hand, when the camera module in the related art adopts multiple moving magnet type voice coil motors to drive different lens groups, there will be a large electromagnetic interference between the multiple different moving magnet type voice coil motors, thereby reducing the zoom and focusing accuracy of the camera module. In comparison, the multiple piezoelectric drivers in the camera module 10 provided in the embodiments of the present application, for example, the first piezoelectric driver 31 and the second piezoelectric driver 32, do not have electromagnetic interference between them, thereby improving the zoom and focusing accuracy of the camera module 10.

[0106] On the other hand, when the camera module in the related art adopts multiple moving coil type voice coil motors to drive different lens groups, the coils of each voice coil motor need to be connected to a flexible printed circuit (FPC) to supply power to the coils. The FPC needs to follow the movement of the lens group under the action of the coil, so that the FPC is bent under the action of external force to generate a reaction force. The above-mentioned reaction force will cause the lens group to be difficult to drive or to tilt, thereby reducing the zoom and focusing accuracy of the camera module. In addition, when the lens group in the camera module needs to realize a long stroke, the size of the FPC also needs to be increased accordingly to match the long stroke of the movement of the lens group. This will make the size of the FPC larger, thereby increasing the size of the entire camera module.

[0107] In comparison, the multiple piezoelectric drivers in the camera module 10 provided in the embodiments of the present application, for example, the first piezoelectric driver 31 and the second piezoelectric driver 32, do not need to follow the movement of the lens group, thereby avoiding the generation of the above-mentioned reaction force by the FPC, achieving the purpose of improving the zoom and focusing accuracy of the camera module 10. Moreover, the size of the above-mentioned FPC does not need to increase with the movement of the lens group, thereby enabling the camera module 10 to obtain a smaller size in the case of achieving a long stroke (for example, more than 10 mm). Therefore, as described above, the camera module 10 provided in the embodiments of the present application can have the characteristics of multiple lens group assemblies, long stroke, and miniaturization.

[0108] On this basis, as shown in FIG. 6, the accommodating cavity 101 of the base 15 has a first sidewall M1 and a second sidewall M2 arranged oppositely and parallel to the first direction X, and the first sidewall M1 and the second sidewall M2 can be parallel to the ZX surface and perpendicular to the Y direction. In addition, optionally, the first piezoelectric driver 31 and the second piezoelectric driver 32 are located on the side of the first sidewall M1 away from the second sidewall M2, that is, the positions of the first piezoelectric driver 31 and the second piezoelectric driver 32 can be on the same side of the base 15.

[0109] In the related art, when a plurality of voice coil motors are used to drive a plurality of mirror groups, the magnets in the plurality of voice coil motors interfere with each other, so that the plurality of voice coil motors cannot be arranged on the same side. In comparison, in the camera module 10 provided by the present application, no voice coil motor needs to be arranged. Therefore, the plurality of first piezoelectric drivers 31 and the plurality of second piezoelectric drivers 32 can be located on the same side (for example, the first sidewall M1 or the second sidewall M2) of the base 15. In this way, the power supply equipment of the first piezoelectric driver 31 and the second piezoelectric driver 32 can also be located on the side of the first sidewall M1, so as to facilitate the layout of the internal structure of the camera module 10, and facilitate the miniaturization of the camera module 10.

[0110] Alternatively, in some other embodiments of the present application, the positions of the first piezoelectric driver 31 and the second piezoelectric driver 32 can be distributed on different sides of the base 15. For example, the first piezoelectric driver 31 is located on the side of the first sidewall M1 of the base 15 (that is, the side of the first sidewall M1 away from the second sidewall M2). The second piezoelectric driver 32 can be located on the side of the second sidewall M2 of the base (that is, the side of the second sidewall M2 away from the first sidewall M1), which is not limited in the present application.

[0111] The above is an example of the camera module 10 having two mirror group assemblies (the first mirror group assembly 21 and the second mirror group assembly 22). In some other embodiments of the present application, optionally, the camera module 10 includes three or more mirror group assemblies arranged along the first direction X, and the arrangement of the mirror group assemblies is as described above, which will not be repeated here. In this case, by analogy, the camera module 10 includes three or more piezoelectric drivers. Each piezoelectric driver is connected with a mirror group assembly to drive the mirror group assembly to move relative to the base 15 along the first direction X. The technical effects of the piezoelectric driver are as described above, which will not be repeated here. In order to facilitate the description, the camera module 10 includes the first mirror group assembly 21 and the second mirror group assembly 22, and the first piezoelectric driver 31 and the second piezoelectric driver 32 are taken as examples for example description.

[0112] The structure of the first piezoelectric driver 31 is described below, and the structure of the second piezoelectric driver 32 can be similarly derived, which will not be described herein. In some embodiments of the present application, as shown in FIG. 6, the first piezoelectric driver 31 can include a first piezoelectric vibrator 311a and a first movable part 312a. Optionally, the first piezoelectric vibrator 311a is connected to the base 15. Thus, the first piezoelectric vibrator 311a can serve as a fixed part of the first piezoelectric driver 31, so that the first piezoelectric driver 31 can be connected to the base 15 through the first piezoelectric vibrator 311a. In the case where the first piezoelectric driver 31 is located on the side of the first side wall M1 away from the second side wall M2, the first piezoelectric vibrator 311a is located on the side of the first side wall M1.

[0113] In addition, in the case where the first piezoelectric driver 31 is located on the side of the first side wall M1 away from the second side wall M2, the first movable part 312a is located between the first piezoelectric vibrator 311a and the first side wall M1, and the first movable part 312a abuts against the first piezoelectric vibrator 311a. The first movable part 312a is connected to the first mirror group assembly 21, for example, in the case where the first mirror group assembly 21 includes an optical lens and a lens holder, the first movable part 312a can be connected to the lens holder. Thus, the first movable part 312a can serve as a movable part of the first piezoelectric driver 31, so that the first piezoelectric driver 31 can be connected to the first mirror group assembly 21 through the first movable part 312a. In addition, the first movable part 312a is also movably connected to the first side wall M1 along the first direction X.

[0114] In addition, the first piezoelectric driver 31 also includes an elastic member 33, which can be connected to the side of the first piezoelectric vibrator 311a away from the first movable part 312a, and the elastic member 33 is also connected to the base 15, so that the first piezoelectric vibrator 311a can be elastically connected to the base 15 through the elastic member 33. Thus, the elastic member 33 can also serve as a fixed part of the first piezoelectric driver 31. Optionally, the above-mentioned elastic member 33 can be a spring or a leaf spring.

[0115] Continuing as shown in FIG. 6, the second piezoelectric driver 32 includes a second piezoelectric vibrator 311b and a second movable part 312b. The second piezoelectric vibrator 311b is connected to the base 15. Similarly, the second piezoelectric vibrator 311b can serve as a fixed part of the second piezoelectric driver 32, so that the second piezoelectric driver 32 can be connected to the base 15 through the second piezoelectric vibrator 311b. In the case where the second piezoelectric driver 32 is located on the side of the first side wall M1 away from the second side wall M2, the second piezoelectric vibrator 311b is located on the side of the first side wall M1.

[0116] In addition, the second movable part 312b is located between the second piezoelectric vibrator 311b and the first side wall M1, and the second movable part 312b is in abutment with the second piezoelectric vibrator 311b. The second movable part 312b is connected with the second lens group assembly 22, for example, when the second lens group assembly 22 includes an optical lens and a lens holder, the second movable part 312b can be connected with the lens holder. Therefore, the second movable part 312b can serve as a movable part of the second piezoelectric driver 32, so that the second piezoelectric driver 32 can be connected with the second lens group assembly 22 through the second movable part 312b. In addition, the second movable part 312b is also movably connected with the first side wall M1 along the first direction X. The working principle of the second piezoelectric vibrator 311b and the second movable part 312b is the same as that of the first piezoelectric vibrator 311a and the first movable part 312a, which will not be repeated here.

[0117] In some embodiments of the present application, as shown in FIG. 6, the elastic member 33 is also connected with the second piezoelectric vibrator 311b on the side away from the second movable part 312b. At this time, in the case that the first piezoelectric driver 31 and the second piezoelectric driver 32 are located on the same side of the base 15, the first piezoelectric driver 31 and the second piezoelectric driver 32 can share the same elastic member 33.

[0118] For example, the elastic member 33 can be connected with the first piezoelectric vibrator 311a of the first piezoelectric driver 31 and the second piezoelectric vibrator 311b of the second piezoelectric driver 32 through the glue dispensing process. In addition, the two ends of the elastic member 33 can be connected with the base 15 through the glue dispensing process, so that the first piezoelectric driver 31 and the second piezoelectric driver 32 can be elastically connected with the base 15 through the above-mentioned elastic member 33. In this way, the first piezoelectric driver 31 and the second piezoelectric driver 32 can reduce the number of components in the camera module 10 by sharing the same elastic member 33, thereby achieving the purpose of simplifying the product structure. Alternatively, the first piezoelectric driver 31 and the second piezoelectric driver 32 can have different elastic members. For the convenience of description, the following examples are described by taking the first piezoelectric driver 31 and the second piezoelectric driver 32 sharing the same elastic member 33 as an example.

[0119] Further, the elastic member 33 can include an elastic part and a rigid part. The elastic part can be located on the side of the first end a2 of the elastic member 33, and the rest of the elastic member 33 is the rigid part. In this way, the rigid part can be connected with the first piezoelectric vibrator 311a of the first piezoelectric driver 31, and the elastic part is connected with the base. Similarly, the first piezoelectric driver 31 and the second piezoelectric driver 32 can also be connected with different elastic members by sharing the same elastic member.

[0120] In addition, as shown in FIG. 6, in the case that the first piezoelectric driver 31 and the second piezoelectric driver 32 share the same elastic member 33, the elastic member 33 is used to provide the first piezoelectric vibrator 311a with the abutment with the first movable part 312a and the second piezoelectric vibrator 311b with the abutment with the second movable part 312b. By connecting the elastic member 33 with the base 15, the first piezoelectric vibrator 311a of the first piezoelectric driver 31 and the second piezoelectric vibrator 311b of the second piezoelectric driver 32, the elastic member 33 can be used to apply a pre-pressing force (perpendicular to the first movable part 312a and the second movable part 312b along the Y direction) to the first piezoelectric vibrator 311a of the first piezoelectric driver 31 and the second piezoelectric vibrator 311b of the second piezoelectric driver 32 through the elastic deformation of the elastic member 33.

[0121] In this way, as shown in FIG. 6, the first piezoelectric vibrator 311a can be in close abutment with the first movable part 312a under the action of the pre-pressing force, which is conducive to transmitting the macroscopic displacement generated by the microscopic vibration of the first piezoelectric vibrator 311a to the first movable part 312a. Similarly, the second piezoelectric vibrator 311b can be in close abutment with the second movable part 312b under the action of the pre-pressing force, which is conducive to transmitting the macroscopic displacement generated by the microscopic vibration of the second piezoelectric vibrator 311b to the second movable part 312b.

[0122] In addition, as shown in FIG. 7, during the vibration of the first piezoelectric vibrator 311a, the first piezoelectric vibrator 311a can transmit the macroscopic displacement generated by the microscopic vibration to the first movable part 312a and drive the first movable part 312a to move relative to the base 15 (as shown in FIG. 6) along the first direction X because the first movable part 312a is in abutment with the first piezoelectric vibrator 311a. Since the first movable part 312a is connected with the first mirror group assembly 21, the first mirror group assembly 21 can be driven to move relative to the base 15 along the first direction X under the drive of the first movable part 312a.

[0123] As shown in FIG. 7, the first piezoelectric vibrator 311a is in abutment with the first movable part 312a, and the first movable part 312a is connected with the first mirror group assembly 21. Therefore, there is no direct contact or connection between the first piezoelectric vibrator 311a and the first mirror group assembly 21, and the first piezoelectric vibrator 311a and the first mirror group assembly 21 are in a decoupled state. In this way, the inclination angle generated by the first piezoelectric vibrator 311a during the vibration process is not easily directly transmitted to the first mirror group assembly 21, so that the first mirror group assembly 21 can be stably moved along the first direction X, i.e., the direction of the optical axis O1-O2 of the first mirror group assembly 21, to reduce the probability of deviation of the first mirror group assembly 21.

[0124] In addition, as known from the above, the elastic member 33 shown in FIG. 6 is connected with the first piezoelectric vibrator 311a and the base 15, and the elastic member 33 has no direct connection relationship with the first movable part 312a. Therefore, the static equilibrium of the pre-pressing force generated by the elastic member 33 only occurs between the base 15 and the first piezoelectric vibrator 311a, and has no effect on the movement of the first movable part 312a. The technical effects of the second piezoelectric vibrator 311b and the second movable part 312b in the second piezoelectric driver 32 are the same as described above, and will not be described here again.

[0125] The following takes the first piezoelectric driver 31 as an example to illustrate the specific structure of the first piezoelectric vibrator 311a, the connection relationship between the first movable part 312a and other components, and other components of the first piezoelectric driver 31. The setting mode of the second piezoelectric vibrator 311b and the second movable part 312b in the second piezoelectric driver 32 can be obtained in the same way, and will not be described one by one.

[0126] In some embodiments of the present application, as shown in FIG. 7, the first piezoelectric vibrator 311a optionally includes a piezoelectric sheet 3110 and a contact bump 3111. The piezoelectric sheet 3110 is elastically connected with the base 15. Optionally, the piezoelectric sheet 3110 includes piezoelectric ceramic. The contact bump 3111 is arranged on the side of the piezoelectric sheet 3110 facing the first movable part 312a, and the contact bump 3111 is in contact with the first movable part 312a. The contact bump 3111 protrudes from the piezoelectric sheet 3110, so that the contact area of the contact bump 3111 with the first movable part 312a is small, thereby making the contact bump 3111 as the vibration starting point of the entire first piezoelectric vibrator 311a, which is beneficial to the vibration of the first piezoelectric vibrator 311a.

[0127] On this basis, in order to make the force in the first direction X generated during the vibration of the first piezoelectric vibrator 311a be more effectively transmitted to the first mirror group assembly 21, as shown in FIG. 8 (a sectional view obtained by cutting along the dashed line A3-A4 in FIG. 7), the first piezoelectric driver 31 further includes a third magnetic member 43 and a fourth magnetic member 44. For example, the third magnetic member 43 can be a magnet (or a magnetic sheet), and the fourth magnetic member 44 can be a magnetic sheet (or a magnet). Alternatively, for another example, the third magnetic member 43 and the fourth magnetic member 44 can both be a magnet or a magnetic sheet, which is not limited in the present application.

[0128] Continuing to FIG. 8, the third magnetic member 43 is located between the first movable part 312a and the first lens group assembly 21, and the third magnetic member 43 is connected with the first movable part 312a. The fourth magnetic member 44 is located between the first movable part 312a and the first lens group assembly 21, and the fourth magnetic member 44 is connected with the first lens group assembly 21. The third magnetic member 43 and the fourth magnetic member 44 are arranged in sequence along the first direction X, and the third magnetic member 43 and the fourth magnetic member 44 are magnetically attracted to each other. Moreover, the first movable part 312a is indirectly connected with the first lens group assembly 21 through the third magnetic member 43 and the fourth magnetic member 44.

[0129] In this way, continuing to FIG. 8, along the first direction X, the first movable part 312a can be more closely connected with the first lens group assembly 21 through the third magnetic member 43 and the fourth magnetic member 44. In this case, the third magnetic member 43 and the fourth magnetic member 44 can generate relative motion in the Z direction and the Y direction, such as frictional motion. Therefore, during the relative motion of the third magnetic member 43 and the fourth magnetic member 44 in the Z direction and the Y direction, the macroscopic displacement along the Z direction and the Y direction converted by the first piezoelectric vibrator 311a from the microscopic vibration can be offset, and thus the phenomenon of the first lens group assembly 21 deviating in the Z direction and the Y direction during movement can be reduced.

[0130] Moreover, along the first direction X, the third magnetic member 43 and the fourth magnetic member 44 can be closely adsorbed, so that the relative displacement between the third magnetic member 43 and the fourth magnetic member 44 along the first direction X is small or almost nonexistent. When the first piezoelectric vibrator 311a converts the microscopic vibration into the macroscopic displacement along the first direction X, the displacement can be effectively transmitted to the first lens group assembly 21 through the closely adsorbed third magnetic member 43 and the fourth magnetic member 44, thereby improving the efficiency and precision of controlling the movement of the first lens group assembly 21 along the first direction X.

[0131] FIG. 8 is an example of arranging the third magnetic member 43 and the fourth magnetic member 44 between the first movable part 312a and the first lens group assembly 21 along the first direction X on the single side (i.e., the right side) of the first movable part 312a. In other embodiments of the present application, the third magnetic member 43 and the fourth magnetic member 44 can be arranged between the first movable part 312a and the first lens group assembly 21 along the first direction X on both sides (i.e., the left side and the right side) of the first movable part 312a. In addition, the connection mode and technical effects of the movable part in the second piezoelectric driver 32 and the second lens group assembly 22 are the same and can be obtained, and thus are not described again here. Alternatively, in other embodiments of the present application, the first movable part 312a and the first lens group assembly 21 can be connected by a glue layer or integrated into a structure, which is not limited in the present application.

[0132] In addition, as shown in FIG. 9, the first movable part 312a of the first piezoelectric driver 31 is movably connected with the first side wall M1. The manner in which the first movable part 312a is movably connected with the first side wall M1 is exemplarily described below. In some embodiments of the present application, the side wall of the accommodating cavity 101 of the base 15 facing the first movable part 312a, for example, the first side wall M1, is provided with a third slot 503 and a fourth slot 504 extending along the first direction X and arranged side by side along the Z direction.

[0133] In addition, as shown in FIG. 9, the first piezoelectric driver 31 further comprises at least one first ball 3112 and at least one second ball 3113. The first ball 3112 is arranged on the side of the first movable part 312a facing the accommodating cavity 101, and is in rolling connection with the third slot 503 and in contact with the first movable part 312a. The second ball 3113 is arranged on the side of the first movable part 312a facing the accommodating cavity 101, and is in rolling connection with the fourth slot 504 and in contact with the first movable part 312a.

[0134] FIG. 9 exemplarily illustrates the case where the first piezoelectric driver 31 comprises two first balls 3112 and two second balls 3113. In this case, as shown in FIG. 9, the first ball 3112 can roll in the third slot 503 and the second ball 3113 can roll in the fourth slot 504 during the reciprocating movement of the first movable part 312a along the first direction X. The third slot 503 and the fourth slot 504 can guide the movement direction of the first ball 3112 and the second ball 3113, respectively.

[0135] Since the extending direction of the third slot 503 and the fourth slot 504 is parallel to the first direction X, the first ball 3112 and the second ball 3113 roll along the first direction X. On this basis, since the first ball 3112 is in contact with the first movable part 312a and the second ball 3113 is in contact with the first movable part 312a, the first movable part 312a can be driven to reciprocate relative to the base 15 along the first direction X by the first ball 3112 and the second ball 3113.

[0136] In addition, as shown in FIG. 9, two strip-shaped grooves, i.e., a third strip-shaped groove 503 and a fourth strip-shaped groove 504, are formed on the side wall of the accommodating cavity 101 of the base 15 towards the first movable part 312a in the Z direction, so that the first movable part 312a can remain stable in the ZX surface during movement in the first direction X, and the phenomenon of warping is reduced, thereby improving the zooming and focusing accuracy of the camera module. Alternatively, in other embodiments of the present application, the base 15 can be provided with the third strip-shaped groove 503 or the fourth strip-shaped groove 504, or three or more strip-shaped grooves, which are not limited in the present application.

[0137] On this basis, in some embodiments of the present application, as shown in FIG. 10 (a cross-sectional view obtained by cutting along the dashed line A5-A6 in FIG. 6), the third strip-shaped groove 503 can be a V-shaped groove. The fourth strip-shaped groove 504 can be a U-shaped groove.

[0138] In the present application, the V-shaped groove refers to that the two opposite side walls of the groove body are inclined. The distance between the two opposite side walls is larger at the opening of the groove body, and smaller at the bottom of the groove body, so that the cross section (parallel to the ZY plane) of the groove body is in the shape of "V" or "trapezoid". The above is only an example of the V-shaped groove, and does not constitute a limitation on the structure of the V-shaped groove, as long as the two opposite side walls of the groove body are inclined, and the distance between the two side walls at the opening of the groove body is larger than the distance between the two side walls at the bottom of the groove body. In addition, the U-shaped groove in the present application refers to that the two opposite side walls of the groove body are parallel. So that the cross section (parallel to the ZY plane) of the groove body is in the shape of "U".

[0139] Based on this, on the one hand, as shown in FIG. 10, when the first ball 3112 is located in the third strip-shaped groove 503, the first ball 3112 abuts against the two opposite side walls of the third strip-shaped groove 503, i.e., the first ball 3112 is in the state of zero fit with the two opposite side walls of the third strip-shaped groove 503. In this way, the rolling direction of the first ball 3112 can be limited by the third strip-shaped groove 503. So that the first ball 3112 rolls in the extension direction of the third strip-shaped groove 503, i.e., in the first direction X, reducing the probability of deviation of the first ball 3112, and further reducing the probability of deviation of the first movable part 312a when moving in the first direction X.

[0140] On the other hand, as shown in FIG. 10, in the case where the second ball 3113 can be located in the fourth strip-shaped groove 504, a gap can be formed between the second ball 3113 and at least one side wall of the fourth strip-shaped groove 504, which can allow the second ball 3113 to have a certain space of movement in a surface (i.e., in the ZY plane) perpendicular to the first direction X, thereby reducing the possibility of interference and avoiding the phenomenon of jamming when the first movable part 312a moves along the first direction X.

[0141] As shown in FIG. 11 (which is a schematic view obtained along the direction C in FIG. 9), a recess 3100 for accommodating the first ball 3112 or the second ball 3113 can be formed on the surface of the base 15 (as shown in FIG. 9) towards the first movable part 312a. In this way, a part of the first ball 3112 (or the second ball 3113) can be embedded in the recess 3100, and another part can be embedded in the third strip-shaped groove 503 (or the fourth strip-shaped groove 504), thereby avoiding the first ball 3112 (or the second ball 3113) from falling off during the movement of the first movable part 312a along the first direction X.

[0142] The above description is based on the example of the movement of the first movable part 312a along the first direction X relative to the base 15 through the first ball 3112 and the second ball 3113. In another embodiment of the present application, as shown in FIG. 12 (which is another schematic view obtained along the direction C in FIG. 9), in the case where the third strip-shaped groove 503 and the fourth strip-shaped groove 504 are formed on the side wall of the accommodating cavity 101 of the base 15 towards the first movable part 312a, the first piezoelectric actuator further comprises a first slider 3114 and a second slider 3115.

[0143] As shown in FIG. 12, the first slider 3114 is arranged on the side of the first movable part 312a towards the accommodating cavity 101 (as shown in FIG. 9), and the first slider 3114 is connected to the first movable part 312a. For example, the first slider 3114 can be bonded to the first movable part 312a, or the first slider 3114 and the first movable part 312a can be connected as an integral structure. The second slider 3115 is arranged on the side of the first movable part 312a towards the accommodating cavity 101 (as shown in FIG. 9), and the second slider 3115 is connected to the first movable part 312a. The connection manner is the same as described above, and thus will not be described again. For example, the first slider 3114 or the second slider 3115 can be a semi-cylindrical structure as shown in FIG. 12, or can also be a semi-spherical protruding structure.

[0144] On this basis, the first slider 3114 is in sliding connection with the third groove 503 (as shown in FIG. 10), and the second slider 3115 is in sliding connection with the fourth groove 504 (as shown in FIG. 10). In this case, the first slider 3114 can slide in the third groove 503 and the second slider 3115 can slide in the fourth groove 504 during the reciprocating movement of the first movable part 312a along the first direction X. The third groove 503 and the fourth groove 504 can guide the movement direction of the first slider 3114 and the second slider 3115, respectively. Since the extension directions of the third groove 503 and the fourth groove 504 are parallel to the first direction X, the first slider 3114 and the second slider 3115 slide along the first direction X. On this basis, since the first slider 3114 is connected to the first movable part 312a and the second slider 3115 is in contact with the first movable part 312a, the first movable part 312a can be driven by the first slider 3114 and the second slider 3115 to reciprocate along the first direction X relative to the base 15.

[0145] Similarly, the third groove 503 in sliding cooperation with the first slider 3114 can be a V-shaped groove as shown in FIG. 10, and the fourth groove 504 in sliding cooperation with the second slider 3115 can be a U-shaped groove. The third groove 503 and the fourth groove 504 are arranged in the same manner and have the same technical effects as described above, and thus will not be described again.

[0146] As can be seen from the above, the first piezoelectric driver 31 and the second piezoelectric driver 32 can be located on the same side wall of the base 15, for example, the first piezoelectric driver 31 and the second piezoelectric driver 32 can be located on the side of the first side wall M1 away from the second side wall M2. On this basis, in order to improve the zooming and focusing accuracy of the camera module 10, the first lens group assembly 21 and the second lens group assembly 22 can also be coaxially arranged. The scheme of the first piezoelectric driver 31 and the second piezoelectric driver 32 being located on the same side and the first lens group assembly 21 and the second lens group assembly 22 being coaxially arranged will be described below.

[0147] In some embodiments of the present application, in order to make the first mirror group assembly 21 and the second mirror group assembly 22 slide along the first direction X relative to the base 15, as shown in FIG. 13, the camera module 10 further comprises a first sliding shaft 61 and a second sliding shaft 62. Wherein, along the first direction X, both ends of the first sliding shaft 61 are connected with the base 15. The first mirror group assembly 21 and the second mirror group assembly 22 are both in sliding fit with the first sliding shaft 61. In addition, along the first direction X, both ends of the second sliding shaft 62 are connected with the base 15. The first mirror group assembly 21 and the second mirror group assembly 22 are both in sliding fit with the second sliding shaft 62. For example, in the case that the first mirror group assembly 21 or the second mirror group assembly 22 comprises a lens holder for carrying optical lenses, the lens holder of the first mirror group assembly 21 or the second mirror group assembly 22 can be in sliding fit with the first sliding shaft 61 and the second sliding shaft 62.

[0148] As described above, the first piezoelectric driver 31 and the second piezoelectric driver 32 located on the same side wall (for example, the first side wall M1) of the base 15 are respectively connected with the first mirror group assembly 21 and the second mirror group assembly 22. For example, the first movable part 312a in the first piezoelectric driver 31 is connected with the first mirror group assembly 21, and the movable part (not labeled in FIG. 13) in the second piezoelectric driver 32 is connected with the second mirror group assembly 22. In this way, the first mirror group assembly 21 driven by the first piezoelectric driver 31 can move along the same sliding shaft, for example, along the extension direction of the first sliding shaft 61 (or the second sliding shaft 62) (i.e., the direction of the optical axis O1-O2 of the first mirror group assembly 21) as the second mirror group assembly 22 driven by the second piezoelectric driver 32. In this case, the first sliding shaft 61 and the second sliding shaft 62 can guide the moving direction of the first mirror group assembly 21 and the second mirror group assembly 22, so that the multiple mirror groups, for example, the first mirror group assembly 21 and the second mirror group assembly 22, can move coaxially.

[0149] In the related art, when multiple moving-magnet voice coil motors are used to drive multiple mirror groups respectively, the tilt between different mirror groups will be affected due to the magnetic field interference between the multiple voice coil motors. This will make the multiple voice coil motors unable to be located on the same side of the base, so that the coaxial sliding of the multiple mirror groups cannot be achieved. Wherein, the tilt between the mirror groups refers to the relative angle of the center of the lens holder and the preset reference line.

[0150] By comparison, in the camera module 10 provided by the embodiments of the present application, the above-mentioned voice coil motor is not required. In this way, on the one hand, during the zooming or focusing process of the camera module 10, since the multiple mirror groups, for example, the first mirror group assembly 21 and the second mirror group assembly 22, can slide coaxially, the sliding reference (for example, the sliding direction, the sliding friction, the stroke error, etc.) of the first mirror group assembly 21 and the second mirror group assembly 22 is consistent, thereby being conducive to improving the zooming or focusing accuracy of the entire camera module 10.

[0151] On the other hand, in the case where the first mirror group assembly 21 and the second mirror group assembly 22 are coaxial, and the first piezoelectric driver 31 and the second piezoelectric driver 32 are located on the same side, for example, the first side wall M1, the first mirror group assembly 21 and the second mirror group assembly 22 can share a stroke space in the first direction X within the accommodating cavity 101. In this case, at least part of the space (i.e., the stroke space) for the first mirror group assembly 21 to move in the first direction X within the accommodating cavity 101 can also be reused as the space for the second mirror group assembly 22 to move in the first direction X within the accommodating cavity 101, so that compared with the scheme of adopting independent stroke spaces for the first mirror group assembly 21 and the second mirror group assembly 22 respectively, the size of the camera module 10 in the first direction X can be effectively reduced, thereby facilitating the miniaturization of the camera module 10.

[0152] FIG. 13 is an example in which the camera module 10 is provided with two slide shafts, for example, the first slide shaft 61 and the second slide shaft 62. In this case, under the driving of the first piezoelectric driver 31 and the second piezoelectric driver 32 respectively, the first mirror group assembly 21 and the second mirror group assembly 22 can not only move in the extension direction of the first slide shaft 61, but also move in the extension direction of the second slide shaft 62. The extension directions of the first slide shaft 61 and the second slide shaft 62 can be the same, for example, both along the optical axis O1-O2 direction (i.e., the X direction) of the first mirror group assembly 21. For example, the first slide shaft 61 and the second slide shaft 62 can be respectively arranged close to the first side wall M1 and the second side wall M2 of the base 15, so that there is a gap between the first slide shaft 61 and the second slide shaft 62, thereby being able to guide the two ends of the first mirror group assembly 21 and the second mirror group assembly 22 in the Y direction, so that the first mirror group assembly 21 and the second mirror group assembly 22 are more stable during sliding.

[0153] In some embodiments of the present application, only one slide shaft can be provided, for example, only the first slide shaft 61 or only the second slide shaft 62. Or three or more slide shafts can be provided, which is not limited in the present application. For the convenience of description, the following examples are all based on the camera module 10 including the first slide shaft 61 and the second slide shaft 62.

[0154] On this basis, as shown in FIG. 14, optionally, a first slot 211 is formed on the first mirror group assembly 21. The first slot 211 can extend along the first direction X, and the first slot 211 is in sliding fit with the first sliding shaft 61. As shown in FIG. 15 (which is a sectional view obtained by cutting along the dashed line A7-A8 in FIG. 14), the first slot 211 is a V-shaped slot. For example, in the case where the first mirror group assembly 21 includes a lens holder for carrying optical lenses, the first slot 211 can be formed on the lens holder. The V-shaped slot is as described above, and will not be described here again.

[0155] In addition, as shown in FIG. 14, optionally, a second slot 212 is formed on the first mirror group assembly 21. The second slot 212 can extend along the first direction X, and the second slot 212 is in sliding fit with the second sliding shaft 62. As shown in FIG. 15, the second slot 212 can be formed on the lens holder. For example, the second slot 212 can be an L-shaped slot as shown in FIG. 15. Alternatively, the second slot 212 can be a U-shaped slot as shown in FIG. 16 (which is another sectional view obtained by cutting along the dashed line A7-A8 in FIG. 14). The U-shaped slot is as described above, and the L-shaped slot can be similarly described, and will not be described here again.

[0156] Based on this, on the one hand, as shown in FIG. 15, in the case where the first slot 211 is in sliding fit with the first sliding shaft 61, the first sliding shaft 61 abuts against both opposite side walls of the first slot 211, i.e., the first sliding shaft 61 is in zero fit with both opposite side walls of the first slot 211. In this way, the sliding direction of the first mirror group assembly 21 can be limited by the first slot 211. Thus, the first mirror group assembly 21 slides along the extension direction of the first sliding shaft 61, i.e., the first direction X, and the probability of deviation of the first mirror group assembly 21 is reduced.

[0157] On the other hand, as shown in FIG. 15, in the case where the second slot 212 is in sliding fit with the second sliding shaft 62, there can be a gap between the second sliding shaft 62 and at least one side wall of the second slot 212. The gap can provide the second sliding shaft 62 with a certain space of movement in a surface perpendicular to the first direction X (i.e., in the ZY plane), thereby reducing the possibility of interference and avoiding the phenomenon of jamming when the first mirror group assembly 21 moves along the first direction X.

[0158] Similarly, as shown in FIG. 14, the fifth groove 213 is formed on the second lens group assembly 22 and extends along the first direction X. The fifth groove 213 is in sliding fit with the first sliding shaft 61. The fifth groove 213 has the same shape as the first groove 211. For example, when the first groove 211 has a V shape, the fifth groove 213 also has a V shape. In addition, the sixth groove 214 is formed on the second lens group assembly 22. The sixth groove 214 extends along the first direction X and is in sliding fit with the second sliding shaft 62. The sixth groove 214 has the same shape as the second groove 212. For example, when the second groove 212 has an L shape or a U shape, the sixth groove 214 also has an L shape or a U shape. In this way, the shapes of the grooves in sliding fit with the same sliding shaft of the first lens group assembly 21 and the second lens group assembly 22 are the same, so that the sliding of the first lens group assembly 21 and the second lens group assembly 22 can be limited while avoiding the above-mentioned jamming phenomenon.

[0159] In addition, in order to improve the motion stability of the first lens group assembly 21 during the sliding along the first sliding shaft 61 and the second sliding shaft 62, optionally, as shown in FIG. 15, the first sliding shaft 61 and the second sliding shaft 62 are metal shafts. In addition, the camera module 10 can further include a first magnetic member 611 and a second magnetic member 612.

[0160] As shown in FIG. 14, the first magnetic member 611 is arranged on the first lens group assembly 21. For example, the first magnetic member 611 can be attached to the side surface of the first lens group assembly 21 away from the first sliding shaft 61. Alternatively, for another example, a groove can be formed on the side surface of the first lens group assembly 21 away from the first sliding shaft 61, and the first magnetic member 611 is arranged in the groove. In addition, the vertical projection of the first magnetic member 611 on the first lens group assembly 21 can overlap the vertical projection of the first sliding shaft 61 on the first lens group assembly 21, and the first magnetic member 611 is attracted to the first sliding shaft 61. In this way, along the Z direction, the first magnetic member 611 can correspond to the position of the first sliding shaft 61 up and down, so as to increase the attraction force between the first magnetic member 611 and the first sliding shaft 61, and make the motion of the first lens group assembly 21 more stable during the sliding along the first sliding shaft 61.

[0161] Similarly, as shown in FIG. 14, the second magnetic member 612 is arranged on the first lens group assembly 21. The vertical projection of the second magnetic member 612 on the first lens group assembly 21 overlaps the vertical projection of the second sliding shaft 62 on the first lens group assembly 21, and the second magnetic member 612 is attracted to the second sliding shaft 62. The arrangement and technical effects of the second magnetic member 612 and the second sliding shaft 62 are the same as described above, and will not be described here.

[0162] In an example, the first magnetic member 611 and the second magnetic member 612 can be a magnet or a magnetic sheet. In addition, the side of the second lens group assembly 22 facing away from the first sliding shaft 61 and the second sliding shaft 62 can also be provided with a magnetic member that is attracted to the first sliding shaft 61 and the second sliding shaft 62. The magnetic member can be provided in the same manner and achieve the same technical effects as described above, and thus will not be described again.

[0163] As described above, the first piezoelectric driver 31 drives the first lens group assembly 21 to reciprocate along the first direction X, and the second piezoelectric driver 32 drives the second lens group assembly 22 to reciprocate along the first direction X, so as to realize zooming or focusing. In another embodiment of the present application, as shown in FIG. 17, the camera module 10 further includes a third lens group assembly 25 located on the light entrance side of the first light path folding mirror 23. The third lens group assembly 25 is slidably connected to the base 15 along the first direction X (as shown in FIG. 18), and the optical axis direction O3-O4 of the third lens group assembly 25 is perpendicular to the first direction X.

[0164] The third lens group assembly 25 can be used to switch the focal length range of the camera module 10 in cooperation with other lens groups during movement along the first direction X. The present application does not limit the range of the switched focal length. In an example, the third lens group assembly 25 can include at least one optical lens. Alternatively, in another example, the third lens group assembly 25 can include at least one optical lens and a lens holder for carrying the optical lens.

[0165] On this basis, in order to drive the third lens group assembly 25 to move along the first direction X, as shown in FIG. 18, the camera module 10 further includes a driving device 34, a part (for example, as a fixed part) of which can be connected to the base 15. And another part (for example, as a movable part) of the driving device 34 can be connected to the third lens group assembly 25, and the driving device 34 is used to drive the third lens group assembly 25 to slide along the first direction X.

[0166] Continuing as shown in FIG. 18, as known from the above, the accommodating cavity 101 of the base 15 has a first sidewall M1 and a second sidewall M2 oppositely arranged and parallel to the first direction X. In the case that the first piezoelectric driver 31 and the second piezoelectric driver 32 shown in FIG. 13 are located at the first sidewall M1 away from the second sidewall M2, when the driving device 34 is a third piezoelectric driver, the third piezoelectric driver, i.e., the driving device 34 shown in FIG. 18, can be located at the second sidewall M2 away from the first sidewall M1. In this way, the driving device 34 can be arranged at opposite sides of the accommodating cavity 101 with the first piezoelectric driver 31 (or the second piezoelectric driver 32), so as to reduce the size of the camera module 10 along the first direction X. Alternatively, in some other embodiments of the present application, the first piezoelectric driver 31, the second piezoelectric driver 32, and the driving device 34 can be located at the same side of the base 15, for example, all at the side of the first sidewall M1 (or the second sidewall M2).

[0167] Similarly, in the case that the driving device 34 is a third piezoelectric driver, continuing as shown in FIG. 18, the driving device 34 can include the third piezoelectric vibrator 311c and the third movable part 312c as described above. The third piezoelectric vibrator 311c of the driving device 34 can be connected to the base 15 as a fixed part of the driving device 34, and the third movable part 312c can be connected to the third lens group assembly 25 as a movable part of the driving device 34. The structures and technical effects of the third piezoelectric vibrator 311c and the third movable part 312c are the same as described above and will not be repeated here. In addition, the driving device 34 can further include the elastic member as described above, and the arrangement and technical effects of the elastic member are the same as described above and will not be repeated here.

[0168] Alternatively, in some other embodiments of the present application, the driving device 34 described above is a voice coil motor. As shown in FIG. 19, the driving device 34 as a voice coil motor includes a coil 332 and a magnet 331. When the voice coil motor is a moving magnet type voice coil motor, the coil 332 is connected to the base 15, and the magnet 331 is connected to the third lens group assembly 25. The magnet 331 drives the third lens group assembly 25 to move relative to the base 15 along the first direction X during movement relative to the coil 332. Alternatively, when the voice coil motor is a moving coil type voice coil motor, the coil 332 is connected to the third lens group assembly 25, and the magnet 331 is connected to the base 15. The coil 332 drives the third lens group assembly 25 to move relative to the base 15 along the first direction X during movement relative to the magnet 331. The present application does not limit the type of the driving device 34 described above, and the following is exemplarily described by taking the driving device 34 as a third piezoelectric driver.

[0169] The following illustrates the manner in which the first piezoelectric driver 31, the second piezoelectric driver 32, and the driving device 34 slide relative to the base 15 in the first direction X. In some embodiments of the present application, as shown in FIG. 20, the camera module 10 optionally includes a first slide shaft 61 and a second slide shaft 62, which are connected to the base 15 (as shown in FIG. 18) and the first lens group assembly 21, the second lens group assembly 22 in the same manner as described above, and thus will not be described again here.

[0170] In addition, as shown in FIG. 20, the camera module 10 further includes a third slide shaft 63 and a fourth slide shaft 64. In the first direction X, both ends of the third slide shaft 63 are connected to the base 15 (as shown in FIG. 18). The third slide shaft 63 is located on the side of the first slide shaft 61 away from the accommodating cavity 101 (as shown in FIG. 18), i.e., in the Z direction, the third slide shaft 63 can be located above the first slide shaft 61. Moreover, the third lens group assembly 25 is in sliding cooperation with the third slide shaft 63.

[0171] As shown in FIG. 20, in the first direction X, both ends of the fourth slide shaft 64 are connected to the base 15 (as shown in FIG. 18). The fourth slide shaft 64 is located on the side of the second slide shaft 62 away from the accommodating cavity 101 (as shown in FIG. 18), i.e., in the Z direction, the fourth slide shaft 64 can be located above the second slide shaft 62. Moreover, the third lens group assembly 25 is in sliding cooperation with the fourth slide shaft 64. For example, in the case where the third lens group assembly 25 includes a lens holder for carrying an optical lens, the lens holder of the third lens group assembly 25 can be in sliding cooperation with the third slide shaft 63 and the fourth slide shaft 64. In this way, the third slide shaft 63 and the fourth slide shaft 64 can guide the moving direction of the third lens group assembly 25, reducing the deviation of the third lens group assembly 25 during sliding.

[0172] As can be seen from the above, as shown in FIG. 20, in the Z direction, the third slide shaft 63 can be located above the first slide shaft 61, and the fourth slide shaft 64 can be located above the second slide shaft 62. Therefore, the third lens group assembly 25 in sliding cooperation with the third slide shaft 63 and the fourth slide shaft 64 can be located above the first lens group assembly 21 and the second lens group assembly 22. In this way, the third lens group assembly 25 can occupy the space in the first direction X, thereby reducing the size of the camera module 10 in the first direction X.

[0173] FIG. 20 is an example in which the camera module 10 is provided with two slide shafts in sliding connection with the third lens group assembly 25, for example, the third slide shaft 63 and the fourth slide shaft 64. In this case, under the driving of the driving device 34, the third lens group assembly 25 can not only move in the extension direction of the third slide shaft 63, but also move in the extension direction of the fourth slide shaft 64. The extension directions of the third slide shaft 63 and the fourth slide shaft 64 can be the same, for example, both in the first direction X.

[0174] For example, the third sliding shaft 63 and the fourth sliding shaft 64 can be arranged close to the first side wall M1 and the second side wall M2 of the base 15 (as shown in FIG. 18) respectively, so that there is a gap between the third sliding shaft 63 and the fourth sliding shaft 64, thereby being able to guide both ends of the third lens group assembly 25 in the Y direction, so that the third lens group assembly 25 is more stable during sliding. In other embodiments of the present application, only one sliding shaft can be provided, for example, only the third sliding shaft 63 or only the fourth sliding shaft 64. Or three or more sliding shafts are provided, which is not limited in the present application.

[0175] The above is an example of the third lens group assembly 25 being arranged above the first lens group assembly 21 and the second lens group assembly 22. In other embodiments of the present application, as shown in FIG. 21, the camera module 10 includes a first sliding shaft 61 and a second sliding shaft 62, and the first sliding shaft 61 and the second sliding shaft 62 are connected to the base 15 in the manner described above. The first lens group assembly 21, the second lens group assembly 22, and the third lens group assembly 25 are all in sliding cooperation with the first sliding shaft 61, and the first lens group assembly 21, the second lens group assembly 22, and the third lens group assembly 25 are all in sliding cooperation with the second sliding shaft 62. In this way, the first lens group assembly 21, the second lens group assembly 22, and the third lens group assembly 25 can move along the same sliding shaft, for example, along the extension direction of the first sliding shaft 61 (or the second sliding shaft 62), thereby reducing the number of sliding shafts and achieving the purpose of simplifying the structure of the camera module 10.

[0176] For example, in the case where the driving device 34 drives the third lens group assembly 25, the first piezoelectric driver 31 drives the first lens group assembly 21, and the second piezoelectric driver 32 drives the second lens group assembly 22 as shown in FIG. 20, the third lens group assembly 25 can move in the same direction as the first lens group assembly 21 and the second lens group assembly 22 in the first direction X, for example, the third lens group assembly 25, the first lens group assembly 21, and the second lens group assembly 22 can all move to the right along the first direction X, or all move to the left along the first direction X.

[0177] Or, for another example, the third lens group assembly 25 can move in the opposite direction to the first lens group assembly 21 or the second lens group assembly 22 in the first direction X. For example, when the third lens group assembly 25 moves to the right along the first direction X, the first lens group assembly 21 or the second lens group assembly 22 can move to the left along the first direction X. Or, when the third lens group assembly 25 moves to the left along the first direction X, the first lens group assembly 21 or the second lens group assembly 22 can move to the right along the first direction X.

[0178] Alternatively, in some other embodiments of the present application, the third lens group assembly 25 can be driven to move along the first direction X by the first piezoelectric driver 31 or the second piezoelectric driver 32 without a separate driver for driving the third lens group assembly 25 to move along the first direction X. For example, as shown in FIG. 22, the third lens group assembly 25 is connected with the first piezoelectric driver 31. For example, in the case that the first piezoelectric driver 31 includes the first movable part 312a, the first movable part 312a of the first piezoelectric driver 31 can also be connected with the third lens group assembly 25. At this time, the first piezoelectric driver 31 is also used to drive the third lens group assembly 25 to slide along the first direction X in the process of driving the first lens group assembly 21 to slide along the first direction X.

[0179] For another example, as shown in FIG. 23, the third lens group assembly 25 is connected with the second piezoelectric driver 32. For example, in the case that the second piezoelectric driver 32 includes the second movable part 312b, the second movable part 312b of the second piezoelectric driver 32 can also be connected with the third lens group assembly 25. At this time, the second piezoelectric driver 32 is also used to drive the third lens group assembly 25 to slide along the first direction X in the process of driving the second lens group assembly 22 to slide along the first direction X.

[0180] As shown in FIG. 22 and FIG. 23, in the camera module 10, without a separate driver for driving the third lens group assembly 25 to move along the first direction X, by sharing the same driver for the third lens group assembly 25 with the first lens group assembly 21 or the second lens group assembly 22, the purpose of reducing the components in the camera module 10 can be achieved, so as to simplify the structure of the camera module 10.

[0181] For convenience of description, the following is exemplarily described by taking the example that the first piezoelectric driver 31 and the second piezoelectric driver 32 for driving the first lens group assembly 21 and the second lens group assembly 22 respectively are located on the same side (for example, the side where the first side wall M1 is located), and the driving device 34 for driving the third lens group assembly 25 is located on the other side (for example, the side where the second side wall M2 is located) as shown in FIG. 24.

[0182] In some embodiments of the present application, as known from the above, the base 15 can have a receiving cavity 101 as shown in Fig. 24, which has a first sidewall M1 and a second sidewall M2 oppositely arranged and parallel to the first direction X. In this case, the camera module 10 can further include, as shown in Fig. 25 (which is a schematic view taken along the direction E in Fig. 24), a fifth magnetic member 201, a sixth magnetic member 203 and at least three first displacement detectors 202, which can serve as components for displacement detection of the first lens group assembly 21 and the second lens group assembly 22.

[0183] Continuing as shown in Fig. 25, the fifth magnetic member 201 can be connected with the first lens group assembly 21. The fifth magnetic member 201 is configured to generate a magnetic field. The sixth magnetic member 203 is connected with the second lens group assembly 22, and the sixth magnetic member 203 is configured to generate a magnetic field. In an example, the fifth magnetic member 201 is a magnetic grid or a magnet. In addition, the at least three first displacement detectors 202 are connected with the base 15. In addition, along the first direction X, the at least three first displacement detectors 202 are spaced apart and arranged within a stroke range L1 of the first lens group assembly 21 and the second lens group assembly 22. The stroke range L1 of the first lens group assembly 21 and the second lens group assembly 22 refers to a range of movement of the first lens group assembly 21 and the second lens group assembly 22 within the receiving cavity 101 along the first direction X from left to right or from right to left.

[0184] In an example, the at least three first displacement detectors 202 can be arranged on an inner surface of the first sidewall M1 facing the receiving cavity 101. The fifth magnetic member 201 can be arranged on a side of the first lens group assembly 21 facing the first sidewall M1, and the sixth magnetic member 203 can be arranged on a side of the second lens group assembly 22 facing the first sidewall M1. In this way, the fifth magnetic member 201 and the sixth magnetic member 203 can overlap with the positions of the at least three first displacement detectors 202 during movement of the first lens group assembly 21 and the second lens group assembly 22, respectively. For example, when the fifth magnetic member 201 (or the sixth magnetic member 203) overlaps with one of the first displacement detectors 202 during movement, the first displacement detector 202 can detect the magnetic field of the fifth magnetic member 201 (or the sixth magnetic member 203).

[0185] In an example, the fifth magnetic member 201 (or the sixth magnetic member 203) overlaps with one of the first displacement detectors 202 refers to that a vertical projection of the fifth magnetic member 201 (or the sixth magnetic member 203) on the first sidewall M1 overlaps with at least a part of a vertical projection of one of the first displacement detectors 202 on the first sidewall M1.

[0186] Alternatively, the at least three first displacement detectors 202 can be disposed on the bottom of the accommodation cavity 101. The fifth magnetic member 201 can be disposed on the surface of the first lens group assembly 21 facing the bottom of the accommodation cavity 101, and the sixth magnetic member 203 can be disposed on the surface of the second lens group assembly 22 facing the bottom of the accommodation cavity 101.

[0187] In some embodiments of the present application, the first displacement detector 202 can be a Hall sensor. The working principle of the Hall sensor is based on the Hall effect, that is, when an electric current passes through a conductor, if the conductor is in a magnetic field (for example, the magnetic field provided by the fifth magnetic member 201 and the sixth magnetic member 203), a certain potential difference will be generated on both sides of the conductor. This potential difference is related to the strength and direction of the magnetic field, so it can be used to detect the strength and direction of the magnetic field.

[0188] Alternatively, in some other embodiments of the present application, the first displacement detector 202 is a tunnel magneto resistance (TMR) sensor. The working principle of the TMR sensor is based on the magnetic tunnel resistance effect, that is, a structure is formed by sandwiching two magnetic layers between a non-magnetic layer. When an external magnetic field (for example, the magnetic field provided by the fifth magnetic member 201 and the sixth magnetic member 203) and the magnetic field in the magnetic layer interact, the direction of the magnetic field changes, thereby changing the value of the magnetic tunnel resistance. This change in resistance value is related to the change in the external magnetic field, so it can be used to detect the strength and direction of the magnetic field.

[0189] Based on this, within the stroke range L1, when the fifth magnetic member 201 (or the sixth magnetic member 203) moves with the first lens group assembly 21 (or the second lens group assembly 22), the at least three first displacement detectors 202 can be used to jointly detect the magnetic field of the fifth magnetic member 201 and the sixth magnetic member 203. The processor obtains the displacement amount of the first lens group assembly 21 or the second lens group assembly 22 according to the detection results of the at least three first displacement detectors 202, so as to realize accurate control of the displacement amount.

[0190] In the case where the displacement amount of the first lens group assembly 21 and the second lens group assembly 22 is a long stroke (for example, the maximum is more than 10 mm), by arranging at least three first displacement detectors 202 at intervals within the stroke range L1 of the first lens group assembly 21 and the second lens group assembly 22, the at least three first displacement detectors 202 can jointly detect the change of the magnetic field, avoiding the occurrence of a detection blind area in the middle region of the long stroke, thereby improving the control accuracy of the displacement amount of the first lens group assembly 21 and the second lens group assembly 22.

[0191] The above is an example of a magnetic member connected to the lens group and a detector connected to the base. In another embodiment of the application, as shown in FIG. 26 (another schematic view obtained along direction E in FIG. 24), the camera module can include two displacement detectors (e.g., Hall sensors or TMR sensors) connected to the first lens group assembly 21 and the second lens group assembly 22, respectively, and a magnetic member (e.g., a magnetic scale and a magnet) connected to the base 15. The size of the magnetic member along the first direction X can be comparable to the length of the travel range L1 of the first lens group assembly 21 and the second lens group assembly 22. The working principle of the displacement sensor and the magnetic member is as described above, and will not be repeated here. As described above, the driving device 34 for driving the third lens group assembly 25 is located on the side where the second side wall M2 is located, as shown in FIG. 24. In this case, the camera module 10 can further include a seventh magnetic member 301 and two second displacement detectors 302, as shown in FIG. 27 (another schematic view obtained along direction E in FIG. 24), which can serve as components for displacement detection of the third lens group assembly 25.

[0192] The seventh magnetic member 301 is connected to the third lens group assembly 25 and is used to generate a magnetic field. The second displacement detector 302 is connected to the base 15. As an example, the second displacement detector 302 can be arranged on the inner surface of the second side wall M2 facing the accommodation cavity 101. The seventh magnetic member 301 can be arranged on the side surface of the third lens group assembly 25 facing the second side wall M2. Alternatively, the second displacement detector 302 can be arranged on the bottom of the accommodation cavity 101. The seventh magnetic member 301 can be arranged on the surface of the third lens group assembly 25 facing the bottom of the accommodation cavity 101. The seventh magnetic member 301 can be a magnetic scale or a magnet, which is used to generate a magnetic field. The second displacement detector 302 can be a Hall sensor or a TMR sensor. The displacement detection method of the second displacement detector 302 is as described above, and will not be repeated here.

[0193] The two second displacement detectors 302 are arranged at both ends of the travel range L2 of the third lens group assembly 25 along the first direction X. The travel range L2 of the third lens group assembly 25 refers to the range of movement of the third lens group assembly 25 in the accommodation cavity 101 along the first direction X from left to right or from right to left. In addition, by arranging one second displacement detector 302 at each end of the travel range L2 of the third lens group assembly 25, one of the second displacement detectors 302 can detect the magnetic field strength while the other second displacement detector 302 can assist in detecting the magnetic field strength, thereby facilitating improvement of the accuracy of displacement detection. No displacement detector needs to be arranged in the middle of the travel range L2 of the third lens group assembly 25, thereby achieving the purpose of simplifying the structure and reducing the cost.

[0194] The above is an example of the magnetic member connected with the lens group and the detector connected with the base. In another embodiment of the present application, as shown in FIG. 28 (which is another schematic view taken along the direction E in FIG. 24), the camera module can include a displacement detector (e.g., a Hall sensor or a TMR sensor) connected with the third lens group assembly 25, and a magnetic member (e.g., a magnetic grid and a magnet) connected with the base 15. The magnetic member can have a dimension along the first direction X that is comparable to the length of the third lens group assembly 25. The displacement sensor and the magnetic member operate in the same manner as described above, and thus will not be described again.

[0195] The above is an example of the magnetic member connected with the lens group and the detector connected with the base. In another embodiment of the present application, as shown in FIG. 28 (which is another schematic view taken along the direction E in FIG. 24), the camera module can include a displacement detector (e.g., a Hall sensor or a TMR sensor) connected with the third lens group assembly 25, and a magnetic member (e.g., a magnetic grid and a magnet) connected with the base 15. The magnetic member can have a dimension along the first direction X that is comparable to the length of the third lens group assembly 25. The displacement sensor and the magnetic member operate in the same manner as described above, and thus will not be described again. The above is an example of the magnetic member connected with the lens group and the detector connected with the base. In another embodiment of the present application, as shown in FIG. 28 (which is another schematic view taken along the direction E in FIG. 24), the camera module can include a displacement detector (e.g., a Hall sensor or a TMR sensor) connected with the third lens group assembly 25, and a magnetic member (e.g., a magnetic grid and a magnet) connected with the base 15. The magnetic member can have a dimension along the first direction X that is comparable to the length of the third lens group assembly 25. The displacement sensor and the magnetic member operate in the same manner as described above, and thus will not be described again.

Claims

1. A camera module (10), characterized by, The application relates to a camera module (10), comprising: a base (15); a first lens group assembly (21); the first lens group assembly (21) is movably connected with the base (15) along a first direction (X); an optical axis direction of the first lens group assembly (21) is parallel to the first direction (X); a second lens group assembly (22); the first lens group assembly (21) and the second lens group assembly (22) are arranged in sequence along the first direction (X), and the second lens group assembly (22) is movably connected with the base (15) along the first direction (X); an optical axis direction of the second lens group assembly (22) is parallel to the first direction (X); a first piezoelectric driver (31); one part of the first piezoelectric driver (31) is connected with the base (15), and the other part of the first piezoelectric driver (31) is connected with the first lens group assembly (21); the first piezoelectric driver (31) is used for driving the first lens group assembly (21) to move along the first direction (X); a second piezoelectric driver (32); one part of the second piezoelectric driver (32) is connected with the base (15), and the other part of the second piezoelectric driver (32) is connected with the second lens group assembly (22); the second piezoelectric driver (32) is used for driving the second lens group assembly (22) to move along the first direction (X).

2. The camera module (10) according to claim 1, characterized in that The base (15) is provided with a containing cavity (101); the containing cavity (101) has a first side wall (M1) and a second side wall (M2) which are oppositely arranged and parallel to the first direction (X); the first piezoelectric driver (31) and the second piezoelectric driver (32) are located on the side of the first side wall (M1) away from the second side wall (M2).

3. The camera module (10) according to claim 2, characterized in that The first piezoelectric driver (31) comprises: a first piezoelectric vibrator (311a) connected with the base (15); a first movable part (312a) located between the first piezoelectric vibrator (311a) and the first side wall (M1); the first movable part (312a) is in abutment with the first piezoelectric vibrator (311a); the first movable part (312a) is connected with the first lens group assembly (21), and the first movable part (312a) is further movably connected with the first side wall (M1) along the first direction (X).

4. The camera module (10) according to claim 3, characterized in that The first piezoelectric driver (31) further comprises: a resilient member (33) connected with the side of the first piezoelectric vibrator (311a) away from the first movable part (312a); the resilient member (33) is further connected with the base (15); the resilient member (33) is used for providing the first piezoelectric vibrator (311a) with a pre-pressing force in abutment with the first movable part (312a).

5. The camera module (10) according to claim 4, characterized in that the second piezoelectric driver (32) comprises: a second piezoelectric vibrator (311b) connected with the base (15); A second movable part (312b) is located between the second piezoelectric vibrator (311b) and the first side wall (M1), and the second movable part (312b) is in abutment with the second piezoelectric vibrator (311b); the second movable part (312b) is connected with the second mirror group assembly (22), and the second movable part (312b) is also movably connected with the first side wall (M1) along the first direction (X); The elastic member (33) is further connected with a side of the second piezoelectric vibrator (311b) away from the second movable part (312b).

6. The camera module (10) according to any one of claims 1-5, characterized in that, The camera module (10) further comprises: A first sliding shaft (61) is connected with the base (15) at both ends thereof along the first direction (X); the first mirror group assembly (21) and the second mirror group assembly (22) are both in sliding fit with the first sliding shaft (61); A second sliding shaft (62) is connected with the base (15) at both ends thereof along the first direction (X); the first mirror group assembly (21) and the second mirror group assembly (22) are both in sliding fit with the second sliding shaft (62).

7. The camera module (10) according to claim 6, characterized in that: The first sliding shaft (61) and the second sliding shaft (62) are both metal shafts; The camera module (10) further comprises: A first magnetic member (611) is arranged on the first mirror group assembly (21); the first magnetic member (611) is used for being attracted to the first sliding shaft (61); A second magnetic member (612) is arranged on the first mirror group assembly (21); the second magnetic member (612) is used for being attracted to the second sliding shaft (62).

8. The camera module (10) according to claim 6 or 7, characterized in that: A first slot (211) is arranged on the first mirror group assembly (21); the first slot (211) extends along the first direction (X), and the first slot (211) is in sliding fit with the first sliding shaft (61); the first slot (211) is a V-shaped slot; A second slot (212) is arranged on the first mirror group assembly (21); the second slot (212) extends along the first direction (X), and the second slot (212) is in sliding fit with the second sliding shaft (62); the second slot (212) is a U-shaped slot or an L-shaped slot.

9. The camera module (10) according to claim 8, characterized in that: A fifth slot (213) is arranged on the second mirror group assembly (22); the fifth slot (213) extends along the first direction (X), and the fifth slot (213) is in sliding fit with the first sliding shaft (61); the fifth slot (213) has the same shape as the first slot (211). The second mirror group assembly (22) is provided with a sixth slot (214); the sixth slot (214) extends along the first direction (X), and the sixth slot (214) is in sliding fit with the second sliding shaft (62); the shape of the sixth slot (214) is the same as that of the second slot (212).

10. The camera module (10) according to any one of claims 1-9, characterized in that, The camera module (10) further comprises: A first light path turning mirror (23), and the first mirror group assembly (21) is located on the light exit side of the first light path turning mirror (23); A third mirror group assembly (25) is located on the light entrance side of the first light path turning mirror (23), and the third mirror group assembly (25) is in sliding connection with the base (15) along the first direction (X); the optical axis direction of the third mirror group assembly (25) is perpendicular to the first direction (X); A driving device (34), one part of the driving device (34) is connected with the base, and the other part of the driving device (34) is connected with the third mirror group assembly (25), and the driving device (34) is used to drive the third mirror group assembly (25) to slide along the first direction (X).

11. The camera module (10) according to claim 10, characterized in that The base (15) is provided with a containing cavity (101) therein; The containing cavity (101) has a first side wall (M1) and a second side wall (M2) which are oppositely arranged and parallel to the first direction (X); The driving device (34) is a third piezoelectric driver, and the third piezoelectric driver is located on the side of the second side wall (M2) away from the first side wall (M1).

12. The camera module (10) according to claim 10, characterized in that, The driving device (34) is a voice coil motor, and the voice coil motor comprises a coil (332) and a magnet (331); The coil (332) is connected with the base (15), and the magnet (331) is connected with the third mirror group assembly (25); or the coil (332) is connected with the third mirror group assembly (25), and the magnet (331) is connected with the base (15).

13. The camera module (10) according to any one of claims 1-9, characterized in that, The camera module (10) further comprises: A first light path turning mirror (23), and the first mirror group assembly (21) is located on the light exit side of the first light path turning mirror (23); A third mirror group assembly (25) is located on the light entrance side of the first light path turning mirror (23), and the third mirror group assembly (25) is in sliding connection with the base (15) along the first direction (X); the optical axis direction of the third mirror group assembly (25) is perpendicular to the first direction (X); The third mirror group assembly (25) is connected with the first piezoelectric driver (31) or the second piezoelectric driver (32), and the first piezoelectric driver (31) or the second piezoelectric driver (32) is further used to drive the third mirror group assembly (25) to slide along the first direction (X).

14. The camera module (10) according to any one of claims 10-13, characterized in that, The base (15) is provided with a containing cavity (101) therein; and the camera module (10) further comprises: a first sliding shaft (61); two ends of the first sliding shaft (61) are connected with the base (15) along the first direction (X); the first lens group assembly (21) and the second lens group assembly (22) are in sliding fit with the first sliding shaft (61); a second sliding shaft (62); two ends of the second sliding shaft (62) are connected with the base (15) along the first direction (X); the first lens group assembly (21) and the second lens group assembly (22) are in sliding fit with the second sliding shaft (62); a third sliding shaft (63); two ends of the third sliding shaft (63) are connected with the base (15) along the first direction (X); the third sliding shaft (63) is located on a side of the first sliding shaft (61) away from the accommodating cavity (101), and the third lens group assembly (25) is in sliding fit with the third sliding shaft (63); a fourth sliding shaft (64); two ends of the fourth sliding shaft (64) are connected with the base (15) along the first direction (X); the fourth sliding shaft (64) is located on a side of the second sliding shaft (62) away from the accommodating cavity (101), and the third lens group assembly (25) is in sliding fit with the fourth sliding shaft (64).

15. The camera module (10) according to any one of claims 10-13, characterized in that, The camera module (10) further comprises: a first sliding shaft (61); two ends of the first sliding shaft (61) are connected with the base (15) along the first direction (X); the first lens group assembly (21), the second lens group assembly (22), and the third lens group assembly (25) are in sliding fit with the first sliding shaft (61); a second sliding shaft (62); two ends of the second sliding shaft (62) are connected with the base (15) along the first direction (X); the first lens group assembly (21), the second lens group assembly (22), and the third lens group assembly (25) are in sliding fit with the second sliding shaft (62).

16. The camera module (10) according to any one of claims 2-15, characterized in that the first piezoelectric driver (31) further comprises: a third magnetic member (43) located between the first movable part (312a) and the first lens group assembly (21), the third magnetic member (43) being connected with the first movable part (312a); a fourth magnetic member (44) located between the first movable part (312a) and the first lens group assembly (21), the fourth magnetic member (44) being connected with the first lens group assembly (21); the third magnetic member (43) and the fourth magnetic member (44) are sequentially arranged along the first direction (X), and the third magnetic member (43) and the fourth magnetic member (44) are magnetically attracted to each other; wherein the first movable part (312a) is indirectly connected with the first lens group assembly (21) through the third magnetic member (43) and the fourth magnetic member (44).

17. The camera module (10) according to any one of claims 2-16, characterized in that, The camera module (10) further comprises: a fifth magnetic member (201) connected with the first lens group assembly (21), the fifth magnetic member (201) being used for generating a magnetic field; A sixth magnetic member (203) is connected with the second lens group assembly (22), and is configured to generate a magnetic field; At least three first displacement detectors (202) are connected with the base (15), and are arranged at intervals in a range of a stroke of the first lens group assembly (21) and the second lens group assembly (22) along the first direction (X), and are configured to jointly detect the magnetic field of the fifth magnetic member (201) and the sixth magnetic member (203).

18. The camera module (10) according to any one of claims 10-16, characterized in that, The camera module (10) further comprises: A seventh magnetic member (301) is connected with the third lens group assembly (25), and is configured to generate a magnetic field; Two second displacement detectors (302) are connected with the base (15), and are arranged at intervals at two ends of a stroke range of the third lens group assembly (25), and are configured to detect the magnetic field of the seventh magnetic member (301).

19. An electronic device (01), characterized by It comprises: A shell (07) and the camera module (10) as claimed in any one of claims 1-18, wherein the camera module (10) is arranged in the shell (07).

Images