Driving device and camera module

Abstract

The invention discloses a driving device and a camera module. The driving device comprises a base; the carrier is provided with a light through hole penetrating along an optical axis and is provided with a first corner and a second corner which are located at diagonal positions; the supporting assembly comprises a first guiding piece and a second guiding piece which are arranged on the base and extend in the optical axis direction, the first guiding piece is located at the first corner, the second guiding piece is located at the second corner, and the carrier is movably supported on the base by the supporting assembly at the first corner and the second corner; the driving assembly is used for driving the carrier to move along the optical axis relative to the base, the driving assembly comprises a first driving part and a second driving part which are arranged on the two adjacent sides of the carrier, and the first driving part and the second driving part are arranged on the two sides of the first corner. According to the optical focusing driving device and the camera module, the optical focusing driving device and the camera module are small in size.

Description

Technical Field

[0001] The present application relates to the field of camera technology, and in particular to a driving device and a camera module. Background Art

[0002] With the popularity of mobile electronic devices, the related technologies of camera modules applied to mobile electronic devices to help users capture images have been rapidly developed and improved. In the market, consumers have increasingly higher and more diverse requirements for the functions of camera modules configured in mobile electronic devices (such as smart phones).

[0003] At present, the common optical focus function is mainly achieved by setting a driving device in the camera module that can drive the optical lens to move along the optical axis. When the existing driving device realizes the optical image stabilization function, it often increases the size of the device, which is contrary to the development trend of mobile devices to be thinner and lighter.

[0004] Therefore, how to further reduce the size of the drive device while meeting its high performance has become an important direction of current technological development. Summary of the invention

[0005] One purpose of the present application is to realize an optical focus drive device and a camera module with a smaller size.

[0006] In order to achieve the above objectives, the technical solution adopted in this application is: a driving device, comprising: Base; A carrier, wherein the carrier has a light-through hole extending along the optical axis, and the carrier has a first corner and a second corner at diagonal positions; a supporting assembly, comprising a first guide and a second guide disposed on the base and extending along the optical axis, wherein the first guide is located at the first corner, and the second guide is located at the second corner, and the carrier is movably supported on the base by the supporting assembly at the first corner and the second corner; and A driving assembly, wherein the driving assembly includes a first driving part and a second driving part arranged on two adjacent sides of the carrier, the first driving part and the second driving part are used to drive the carrier to move along the optical axis relative to the base, and the first driving part and the second driving part are arranged on both sides of the first corner.

[0007] Preferably, the number of contact surfaces between the carrier and the first guide member is greater than the number of contact surfaces between the carrier and the second guide member.

[0008] As a preference, the number of contact surfaces between the carrier and the first guide member is two, and the number of contact surfaces between the carrier and the second guide member is one.

[0009] As a preferred embodiment, the carrier has a first contact surface and a second contact surface that are not coplanar at the first corner, the first guide member contacts the first contact surface and the second contact surface, the carrier has a third contact surface at the second corner, the second guide member contacts the third contact surface, the central axis of the first guide member along the optical axis direction and the central axis of the second guide member along the optical axis direction are connected to form a supporting surface, the third contact surface is parallel to the supporting surface, and the angle between the first contact surface and the supporting surface is θ 1 , the angle between the second contact surface and the support surface is θ 2 ,θ 1 ≠90°, θ 2 ≠90°.

[0010] As a preferred embodiment, there are at least two contact positions between the first guide member and the first contact surface spaced apart along the optical axis direction, there are at least two contact positions between the first guide member and the second contact surface spaced apart along the optical axis direction, and there is only one contact position between the second guide member and the third contact surface; θ 1 =θ 2 .

[0011] Preferably, the support assembly further comprises a first magnetic member and a second magnetic member, wherein a surface of the second magnetic member facing the second guide member is parallel to the third contact surface, and the first magnetic member is parallel to the first contact surface of the first guide member.

[0012] As a preference, the first guide member and the second guide member are guide rods.

[0013] Preferably, the first driving unit includes a first magnet and a first coil that are arranged opposite to each other, the first magnet is arranged on one of the carrier or the base, and the first coil is arranged on the other of the carrier or the base; the second driving unit includes a second magnet and a second coil that are arranged opposite to each other, the second magnet is arranged on one of the carrier or the base, and the second coil is arranged on the other of the carrier or the base.

[0014] Preferably, the supporting assembly further comprises a first magnetic member and a second magnetic member, wherein the first magnetic member and the first coil are arranged on the same side, and there is a first magnetic attraction force between the first magnetic member and the first magnet, and the second magnetic member and the second guide member are arranged at the second corner opposite to each other, and there is a second magnetic attraction force between the second guide member and the second magnetic member.

[0015] Preferably, the angle between the direction of the first magnetic attraction force and the direction of the second magnetic attraction force is an acute angle or an obtuse angle.

[0016] Preferably, the first magnet and the second magnet are arranged on the carrier, the base includes a conductive part arranged around the side wall of the base, the conductive part extends to a position opposite to the first driving part and the second driving part, the first coil and the second coil are arranged on the base and connected to the conductive part, and the first magnetic part is located on the other side of the conductive part opposite to the first coil.

[0017] Preferably, the base further comprises a position sensor arranged opposite to the second magnetic member, the second magnetic member is arranged on the carrier, the second magnetic member is suitable for providing a magnetic field, and the position sensor is used to detect changes in the magnetic field of the second magnetic member.

[0018] Preferably, the size of the second magnetic member at one end close to the position sensor is larger than that at one end away from the position sensor, and the second magnetic member has at least two magnetic poles on a side facing the position sensor.

[0019] Preferably, the carrier also includes a first side surface and a second side surface located on both sides of the first corner, and a third side surface and a fourth side surface located on both sides of the second corner, the first side surface is adjacent to the fourth side surface, the second side surface is adjacent to the third side surface, the first driving unit is arranged at an end of the first side surface close to the fourth side surface, the second driving unit is arranged at an end of the second side surface close to the third side surface, and the position sensor is arranged on the third side surface.

[0020] Preferably, the first driving portion is arranged at an end of the first side surface close to the fourth side surface, and the second driving portion is arranged at an end of the second side surface close to the third side surface.

[0021] Preferably, the conductive part is arranged around the first side surface, the second side surface and the third side surface of the carrier, and the conductive part is not arranged outside the fourth side surface.

[0022] As a preference, it further includes at least three conductive inserts arranged on the base, each of the conductive inserts is arranged at intervals from each other, the conductive insert includes a fixed portion embedded in the base and a pin extending in a direction perpendicular to the fixed portion, and at least one of the conductive inserts also includes an extension portion extending along the bottom surface of the base.

[0023] Preferably, the driving device further comprises an upper cover arranged on the base, wherein the upper cover and the base form a accommodating cavity, and the carrier, the supporting assembly and the driving assembly are arranged in the accommodating cavity so that the upper cover is grounded through the extension portion.

[0024] Preferably, the bottom surface of the base includes a first side, a second side, a third side and a fourth side, the fixing portions of the conductive inserts are arranged side by side on the second side of the base, and at least one of the conductive inserts located at both ends extends to both sides to form the extension portions, and the extension portions extend from the second side to the third side, the fourth side and the first side in sequence, or extend from the second side to the first side, the fourth side and the third side in sequence, and the extension portions extend outward at each corner position of the base to form a grounding contact portion for contacting the upper cover.

[0025] As a preferred embodiment, a camera module includes: Optical lens; A photosensitive component, arranged opposite to the optical lens along the optical axis, for receiving the light emitted by the optical lens for imaging, so as to obtain an image of the object; and As in any of the driving devices described above, the optical lens is held on the photosensitive path of the photosensitive component by the driving device, and the driving device is suitable for driving the optical lens to move along the optical axis direction to achieve optical performance adjustment.

[0026] Compared with the prior art, the beneficial effects of this application are: (1) The driving device of the present application can be applied to the front camera module of a mobile phone, which can meet the miniaturization requirements of the device without affecting the function of the camera module.

[0027] (2) The driving device of the present application further optimizes the internal space, which can make the layout of the driving part and other components more compact, reduce unnecessary space waste, and thus effectively reduce the overall size of the camera module.

[0028] (3) The driving device of the present application can further narrow the camera module and reduce its overall size by reasonably arranging the position of the driving part. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a stereoscopic schematic diagram of an embodiment of a camera module of the present application.

[0030] Figure 2 This is a schematic diagram of an explosion in one embodiment of the camera module of the present application.

[0031] Figure 3 It is a cross-sectional schematic diagram of an embodiment of the camera module of the present application.

[0032] Figure 4 This is a schematic diagram of the structure of the internal support assembly and the drive assembly in one embodiment of the drive device of the present application.

[0033] Figure 5 This is a schematic diagram of the position of the guide portion in one embodiment of the driving device of the present application.

[0034] Figure 6 This is a schematic diagram of the protruding portion of the guide member in one embodiment of the driving device of the present application.

[0035] Figure 7 This is a schematic diagram of the contact surface of the guide member in one embodiment of the driving device of the present application.

[0036] Figure 8 This is a schematic diagram of the angles of the contact surface and the support surface of the guide member in one embodiment of the driving device of the present application.

[0037] Fig. 9 It is a three-dimensional schematic diagram of an embodiment of the driving device of the present application.

[0038] Fig.10 It is a schematic diagram of the force analysis of the carrier in one embodiment of the driving device of the present application.

[0039] Fig.11 This is a schematic diagram of the positions of the second magnetic member and the supporting surface in one embodiment of the driving device of the present application.

[0040] Fig.12 Schematic diagram of the position of the second magnetic component in one embodiment of the driving device of the present application.

[0041] Fig.13 It is a schematic top view of a base in one embodiment of the driving device of the present application.

[0042] Fig.14 It is a three-dimensional schematic diagram of a conductive insert in an embodiment of the driving device of the present application.

[0043] Fig.15 This is a schematic diagram of the position of the conductive insert in one embodiment of the camera module of the present application.

[0044] Fig.16 Schematic diagram of the connection between the conductive part and the conductive insert in one embodiment of the camera module of the present application.

[0045] In the figure: 1, optical lens; 11, lens barrel; 12, optical lens; 2, photosensitive component; 21, photosensitive chip; 22, filter element; 23, bracket; 24, circuit board; 25, electronic component; 3, driving device; 31, upper cover; 32, base; 321, first side; 322, second side; 323, third side; 324, fourth side; 33, carrier; 331, first side; 332, second side; 333, third side; 334, fourth side; 335, light hole; 336, first guide; 3361, first convex; 3362, second convex; 337, second guide; 3371, third convex; 34, driving component; 341, first driving unit; 3411, first magnet ;3412, first coil;342, second drive unit;3421, second magnet;3422, second coil;35, support assembly;351, first magnetic member;352, second magnetic member;353, first guide member;3531, first support position;3532, second support position;354, second guide member;3541, third support position;36, position sensor;37, conductive portion;38, conductive insert;381, fixing portion;382, pin;383, extension portion;3831, ground contact portion;3832, non-ground contact portion;3801, end conductive insert;3802, middle conductive insert;41, first contact surface;42, second contact surface;43, third contact surface;44, support surface. DETAILED DESCRIPTION

[0046] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0047] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0048] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0049] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0050] In the drawings of the present application, the X, Y, and Z axes are coordinate axes of a spatial rectangular coordinate system, and the X, Y, and Z axes correspond to the width direction, length direction, and height direction of the driving device 3, respectively. Among them, the optical axis direction of the driving device 3 is the optical axis direction of the optical lens 1, which is parallel to the Z axis.

[0051] like Figure 1-3 As shown, one embodiment of the present application provides a driving device 3 of a camera module, including a base 32, a carrier 33 movably arranged in the base 32, and a driving component 34 for driving the carrier 33 to move relative to the base 32, the carrier 33 has a light hole 335 that passes through along the optical axis, the optical lens 1 is installed in the light hole 335 of the carrier 33, and the driving component 34 is used to drive the carrier 33 to move relative to the base 32 along the optical axis direction of the optical lens 1 to achieve an optical focusing function. The photosensitive component 2 of the camera module can be installed on the base 32, and the light is suitable for being incident on the photosensitive component 2 for imaging after being converged by the optical lens 1. It is worth mentioning that the light hole 335 of the carrier 33 can be as follows Figure 2 The structure shown, that is, the light hole 335 is a closed through hole, which has a side wall, and the side wall is arranged around the optical axis of the optical lens 1; alternatively, the light hole 335 of the carrier 33 can also be an unclosed through hole. It should be understood that when the light hole 335 is not closed, the optical lens 1 can also be installed in the light hole 335.

[0052] In this embodiment, the driving device 3 further includes an upper cover 31 , which is adapted to be mutually buckled with the base 32 to form a receiving cavity with the base 32 to protect other components of the driving device 3 .

[0053] Furthermore, if Figure 4 As shown, the carrier 33 has a first corner A and a second corner B at a diagonal position, and the driving device 3 further includes a supporting assembly 35, and the carrier 33 is movably supported on the base 32 by the supporting assembly 35 at the first corner A and the second corner B. The supporting assembly 35 includes a first guide member 353 and a second guide member 354 that are arranged on the base 32 and extend along the optical axis direction, the first guide member 353 is located at the first corner A, and the second guide member 354 is located at the second corner B.

[0054] Furthermore, the driving device 3 further includes a driving assembly 34, which is used to drive the carrier 33 to move relative to the base 32 in a direction parallel to the optical axis. The driving assembly 34 includes a first driving portion 341 and a second driving portion 342 arranged on two adjacent sides of the carrier 33, and applies forces to the carrier 33 from two adjacent sides of the carrier 33 to drive the carrier 33 to move. The adjacently arranged driving assemblies 34 help to improve the compactness of the overall structure of the driving device 3, effectively utilize the internal space of the driving device 3, and reduce the size of the driving device 3. It is worth mentioning that in the present application, the first driving portion 341 and the second driving portion 342 are both used to drive the carrier 33 to move relative to the base 32 along the optical axis.

[0055] Furthermore, if Figure 4 As shown, the first driving part 341 and the second driving part 342 are arranged on both sides of the first corner A. No other components are arranged on both sides of the first corner A of the driving device 3 of the present application, so there is no need to increase the size of the driving device 3, and there is enough space to arrange the driving component 34. In the prior art, in order to ensure the stable driving of the carrier 33, the two driving parts are usually symmetrically arranged on both sides of the carrier 33, and the center line of the two driving parts passes through the optical axis. However, in the scheme of the present application, if the first driving part 341 and the second driving part 342 are arranged according to the existing scheme, the second driving part 342 will occupy the space of the components that have been arranged at the second corner B, so that the size of the carrier 33 along the Y-axis direction needs to be increased, and increasing the size of the carrier 33 is contrary to the pursuit of miniaturization. In addition, if the size of the first driving part 341 and the second driving part 342 along the Y-axis direction is reduced, the symmetry of the first driving part 341 and the second driving part 342 is ensured, and the size of the driving device 3 along the Y-axis direction is not increased, which will affect the size of the driving force. Based on this, the present application proposes to arrange the first driving part 341 and the second driving part 342 adjacent to each other, and to make full use of the space of the carrier 33 and reasonably arrange the first driving part 341 and the second driving part 342 without reducing the size of the driving part and increasing the size of the carrier 33.

[0056] In some embodiments, the number of contact surfaces between the carrier 33 and the first guide 353 is greater than the number of contact surfaces between the carrier 33 and the second guide 354. It should be understood that since the first driving part 341 and the second driving part 342 are arranged on two adjacent sides of the first guide 353, when the coil is energized, the driving force generated by the first driving part 341 and the second driving part 342 is mainly concentrated near the first guide 353. Therefore, providing more contact surfaces between the carrier 33 and the first guide 353 helps to reduce the vibration of the carrier 33 during the focusing process, thereby enhancing the stability between the first guide 353 and the carrier 33.

[0057] Furthermore, the number of contact surfaces between the carrier 33 and the first guide 353 is two, which mainly play the role of limiting and guiding the carrier 33, and the number of contact surfaces between the carrier 33 and the second guide 354 is one, which mainly plays the role of supporting. The two side surfaces of the carrier 33 of the present application are in contact with the first guide 353, and the first guide 353 can be used as the main guide to limit the movement of the carrier 33 along the optical axis. Therefore, the first driving part 341 and the second driving part 342 of the present application are arranged on both sides adjacent to the first corner A where the first guide 353 is located, which helps to improve the linearity and stability of the movement of the carrier 33 relative to the base 32.

[0058] Specifically, Figure 7 As shown, the carrier 33 has a first contact surface 41 and a second contact surface 42 that are not coplanar at the first corner A, and the first guide 353 contacts the first contact surface 41 and the second contact surface 42 respectively. The carrier 33 has a third contact surface 43 at the second corner B, and the second guide 354 contacts the third contact surface 43. Preferably, the first guide 353 and the carrier 33 only contact the first contact surface 41 and the second contact surface 42, and the second guide 354 and the carrier 33 only contact the third contact surface 43. At this time, the first guide 353 mainly plays a role in limiting and guiding the carrier 33, and the second guide 354 mainly plays a role in supporting the carrier 33.

[0059] In some embodiments, Figure 5 , Figure 6 As shown, the carrier 33 has a first guide portion 336 extending along the Z-axis direction corresponding to the first guide member 353, and has a second guide portion 337 extending along the Z-axis direction corresponding to the second guide member 354. The first guide portion 336 has a first convex portion 3361 and a second convex portion 3362, and the first guide member 353 has a first support position 3531 and a second support position 3532 at positions corresponding to the first convex portion 3361 and the second convex portion 3362. The second guide portion 337 has a third convex portion 3371, and the second guide member 354 has a third support position 3541 at a position corresponding to the third convex portion 3371. Thus, along the Z-axis direction, the first guide member 353 and the second guide member 354 form a stable triangular support for the carrier 33, and the first guide member 353 and the second guide member 354 can achieve a stable support effect on the carrier 33.

[0060] In some embodiments, the central axis of the first guide member 353 along the optical axis and the central axis of the second guide member 354 along the optical axis are connected to form a support surface 44, or in other words, the central axis of the first guide member 353 along the optical axis and the central axis of the second guide member 354 along the optical axis are parallel to each other and are located together in the support surface 44. It can be understood that the support surface 44 mentioned in the present application is a virtual surface and does not specifically refer to a specific plane.

[0061] In some embodiments, Figure 8 As shown, the third contact surface 43 is parallel to the support surface 44, and the angle between the first contact surface 41 and the support surface 44 is θ 1 , the angle between the second contact surface 42 and the support surface 44 is θ 2 ,θ 1 ≠90°, θ 2 ≠90°. Preferably, θ 1 =θ 2 It should be understood that at the second corner B, the third contact surface 43 is parallel to the support surface 44, and the second guide member 354 does not limit and guide the carrier 33. Therefore, the first guide member 353 at the first corner A is mainly used to guide the carrier 33.

[0062] In some embodiments, the first guide 353 and the second guide 354 are respectively implemented as guide rods, and the first guide 353 and the second guide 354 are fixed to the base 32 , so that the carrier 33 moves along the guiding direction of the first guide 353 and / or the second guide 354 .

[0063] Furthermore, if Fig. 9 As shown, the carrier 33 also includes a first side surface 331 and a second side surface 332 located on both sides of the first corner A, and a third side surface 333 and a fourth side surface 334 located on both sides of the second corner B, wherein the first side surface 331 is adjacent to the fourth side surface 334, the second side surface 332 is adjacent to the third side surface 333, the first side surface 331 and the third side surface 333 are parallel to the Y-axis direction, the second side surface 332 and the fourth side surface 334 are parallel to the X-axis direction, and the X-axis direction and the Y-axis direction are perpendicular to each other and are both perpendicular to the optical axis.

[0064] In some embodiments, the first driving portion 341 and the second driving portion 342 are arranged on both sides of the first corner A, the first driving portion 341 is arranged at one end of the first side surface 331 close to the fourth side surface 334, and the second driving portion 342 is arranged at one end of the second side surface 332 close to the third side surface 333. Since the first guide member 353 is arranged at the first corner A, the first driving portion 341 and the second driving portion 342 are respectively offset to the side away from the first guide member 353, which can avoid excessive increase in the size of the driving device 3, make full use of the space on the adjacent side of the carrier 33, and facilitate the miniaturization of the driving device 3.

[0065] In some embodiments, the driving component 34 is a voice coil motor, and the first driving part 341 includes a first magnet 3411 and a first coil 3412 that are arranged opposite to each other, the first magnet 3411 is arranged in one of the carrier 33 or the base 32, and the first coil 3412 is arranged in the other of the carrier 33 or the base 32; the second driving part 342 includes a second magnet 3421 and a second coil 3422 that are arranged opposite to each other, the second magnet 3421 is arranged in one of the carrier 33 or the base 32, and the second coil 3422 is arranged in the other of the carrier 33 or the base 32. The first coil 3412 and the first magnet 3411 are arranged opposite to each other in a direction perpendicular to the optical axis, and the second coil 3422 and the second magnet 3421 are also arranged opposite to each other in a direction perpendicular to the optical axis.

[0066] Preferably, the first magnet 3411 and the second magnet 3421 are fixed to two adjacent sides of the carrier 33, and the first coil 3412 and the second coil 3422 are fixed to two adjacent sides of the base 32, so that after the first coil 3412 and the second coil 3422 are energized, the first magnet 3411, the second magnet 3421 and the carrier 33 are driven to move along the optical axis. Further preferably, the first magnet 3411 is arranged at one end of the first side surface 331 close to the fourth side surface 334, and the second magnet 3421 is arranged at one end of the second side surface 332 close to the third side surface 333.

[0067] Furthermore, if Figure 7 and Figure 8 As shown, the support assembly 35 also includes a first magnetic member 351 and a second magnetic member 352, the surface of the second magnetic member 352 facing the second guide member 354 is parallel to the third contact surface 43, the first magnetic member 351 is parallel to the first contact surface 41 of the first guide member 353, the first magnetic member 351 and the first coil 3412 are arranged on the same side, there is a first magnetic attraction between the first magnetic member 351 and the first magnet 3411, the second magnetic member 352 and the second guide member 354 are arranged at the second corner B opposite to each other, there is a second magnetic attraction between the second guide member 354 and the second magnetic member 352, and the angle between the direction of the first magnetic attraction and the direction of the second magnetic attraction is an acute angle or an obtuse angle, that is, the direction of the first magnetic attraction and the direction of the second magnetic attraction are not parallel and not perpendicular to each other.

[0068] It is worth mentioning that Fig.10 As shown, the central axis of the first guide member 353 along the optical axis direction and the central axis of the second guide member 354 along the optical axis direction are connected to form a support surface 44, and the first magnetic attraction F between the first magnetic member 351 and the first magnet 3411 1 The direction relative to the support surface 44 is not vertical, and has a large angle (about 45°). 1 After decomposition, the component force F parallel to the support surface 44 is12 The carrier 33 will move along F in the figure 12 However, since the first guide member 353 of the present application maintains a limit position with at least two surfaces in contact with the carrier 33, the carrier 33 is effectively prevented from being subjected to the component force F 12 The problem of deviation caused by the influence of the driving device 3 is helpful to improve the overall stability of the driving device 3.

[0069] Furthermore, for ease of assembly, the second guide member 354 of the present application only maintains one surface contact with the carrier 33 and does not play a limiting role. It should be understood that since the second magnetic attraction between the second magnetic member 352 and the second guide member 354 is perpendicular or nearly perpendicular to the support surface 44, the component of the second magnetic attraction parallel to the support surface 44 is zero or very small, and therefore, even if the second guide member 354 is not limited, it will not affect the stability of the carrier 33 during the focusing movement.

[0070] Furthermore, the second magnetic member 352 is fixed to the third side surface 333 of the carrier 33 and is opposite to the second guide member 354. At this time, since the fourth side surface 334 is neither provided with a driving magnet nor a magnetic member, the size of the fourth side surface 334 of the carrier 33 can be reduced, thereby further reducing the overall size of the driving device 3.

[0071] In some embodiments, Fig.11 As shown, on a plane perpendicular to the optical axis, the angle between the line connecting the geometric center of the second guide member 354 and the geometric center of the second magnetic member 352 and the line connecting the geometric center of the second guide member 354 and the geometric center of the first guide member 353 is α, and α≤90°. Preferably, α<90°, that is, the second magnetic member 352 is located on the side of the second guide member 354 close to the first guide member 353, so that the second magnetic member 352 does not protrude outside the carrier 33, thereby avoiding the increase of the size of the driving device 3 along the X-axis direction.

[0072] In some embodiments, the first magnetic member 351 and the second magnetic member 352 may be implemented as magnets, and the first guide member 353 and the second guide member 354 may be implemented as iron-containing materials suitable for being attracted by magnets. The material of the guide member may be set according to specific circumstances, and this application does not limit this.

[0073] In some embodiments, the first magnet 3411 and the second magnet 3421 are disposed on the carrier 33, the base 32 includes a conductive part 37 disposed around the side wall of the base 32, the conductive part 37 extends to a position opposite to the first driving part 341 and the second driving part 342, the first coil 3412 and the second coil 3422 are disposed on the base 32 and connected to the conductive part 37.

[0074] Specifically, Figure 8As shown, the conductive part 37 is arranged around the first side 331, the second side 332 and the third side 333 of the carrier 33. Since the fourth side 334 of the carrier 33 of the present application does not have any components that need to be conductive, the conductive part 37 is not set on the fourth side 334, which can further reduce the size of the driving device 3 along the Y-axis direction.

[0075] Furthermore, if Fig. 9 As shown, the first magnetic member 351 is fixed to the outer wall of the base 32 by being fixed to the conductive part 37. The first magnetic member 351 is fixed to the base 32 and attracted to the first magnet 3411 to provide a first magnetic force, and the first magnetic member 351 and the first coil 3412 are arranged opposite to each other on both sides of the conductive part 37.

[0076] Furthermore, if Fig.12 As shown, the base 32 also includes a position sensor 36 arranged opposite to the second magnetic member 352. The second magnetic member 352 is arranged on the carrier 33 and is suitable for providing a magnetic field. The position sensor 36 is used to detect changes in the magnetic field of the second magnetic member 352. Compared with the driving device of the prior art, which also needs to add a sensing magnet that matches the position sensing magnet, the second magnetic member 352 of the present application is used for magnetic attraction and position sensing at the same time, which can reduce the internal components of the driving device 3, thereby further reducing the size of the driving device 3.

[0077] Furthermore, in order to ensure the effectiveness of the second magnetic attraction, the second magnetic member 352 of the present application is disposed opposite to the second guide member 354 in the front face. Specifically, Figure 8 As shown, the surface of the second magnetic member 352 facing the second guiding member 354 is parallel to the third contact surface 43 . Therefore, the second magnetic member 352 is disposed obliquely relative to the third side surface 333 of the carrier 33 .

[0078] In some embodiments, the position sensor 36 can be selected as a Hall sensor, anisotropic magnetoresistance (AMR) sensor, giant magnetoresistance (GMR) sensor, tunnel magnetoresistance (TMR) sensor, linear magnetoresistance sensor, etc. To further improve the position sensing performance, the position sensor 36 is preferably a (TMR) position sensor and a magnetoresistance modulation sensor, which helps to obtain the magnetic field change information of the tilted second magnetic member 352.

[0079] Furthermore, if Fig.12As shown, the second magnetic member 352 has at least two magnetic poles on the side facing the position sensor 36, and the two magnetic poles are not the same magnetic pole. Specifically, the magnetic pole above the second magnetic member 352 is S, and the magnetic pole below is N, or the magnetic pole above is N, and the magnetic pole below is S. It should be understood that since the two magnetic poles are S pole and N pole, respectively, a strong magnetic field gradient will be formed between them. The magnetic field gradient refers to the rate of change of the magnetic field strength in space. This gradient enables the position sensor 36 to more clearly sense the change in the magnetic field strength.

[0080] Furthermore, the first driving unit 341 of the present application is arranged on the first side surface 331, the second driving unit 342 is arranged on the second side surface 332, and the position sensor 36 is arranged on the third side surface 333 of the carrier 33, so that the first driving unit 341, the second driving unit 342 and the position sensor 36 will not interfere with each other, such as magnetic interference. It should be understood that the first driving unit 341, the second driving unit 342 and the position sensor 36 are dispersedly arranged on each side surface, which can make full use of the space of the driving device 3, and will not cause the size of the driving device 3 to increase due to too many components on a single side, so that the internal space of the driving device 3 can be used more reasonably, and the size of the driving device 3 along the X-axis direction and the Y-axis direction can be reduced.

[0081] Furthermore, the carrier 33 also has a magnet groove with a shape similar to that of the second magnetic member 352, so that the second magnetic member 352 can be firmly embedded in the carrier 33, avoiding an increase in the size of the driving device 3 and reducing the risk of the second magnetic member 352 falling off.

[0082] Furthermore, the size of the second magnetic member 352 at one end close to the position sensor 36 is larger than the size at the end away from the position sensor 36, which can provide a stronger magnetic field for the position sensor 36, thereby improving the sensing accuracy of the position sensor 36 and reducing the risk of the second magnetic member 352 falling off.

[0083] Furthermore, the second magnetic part 352 is installed upward from the bottom of the carrier 33. Installing the second magnetic part 352 from the bottom can avoid space limitations when operating from the top, facilitate the use of installation tools and the operator's field of vision, simplify the installation process, reduce installation difficulty, and improve production efficiency.

[0084] In some embodiments, the conductive part 37 is implemented as a circuit board, fixed to the outer peripheral side of the base 32, and the conductive part 37 is arranged around three outer peripheral sides of the base 32. Specifically, an opening is provided on the base 32 corresponding to the first coil 3412, the second coil 3422 and the position sensor 36, and the first coil 3412, the second coil 3422 and the position sensor 36 are respectively fixed through the opening and electrically connected to the conductive part 37, so that the first coil 3412, the second coil 3422 and the position sensor 36 are respectively fixed to the base 32 through the conductive part 37.

[0085] In some embodiments, the first coil 3412 , the second coil 3422 , and the position sensor 36 are all electrically connected to the conductive portion 37 , and are electrically connected to the photosensitive component 2 through the conductive portion 37 .

[0086] Furthermore, if Fig.14 As shown, the driving device 3 also includes at least three conductive inserts 38 arranged on the base 32, wherein two conductive inserts 38 are respectively connected to the two ends of the coil to form a complete circuit, so that the current can stably flow through the coil, ensure the normal operation of the driving device 3, and realize functions such as lens autofocus and optical image stabilization. Another conductive insert 38 is used to connect to the upper cover 31 and then be grounded, so that the potential of each circuit inside the driving device 3 remains stable, ensuring the normal operation of the circuit and the accurate transmission of the signal, avoiding circuit failure and signal distortion caused by potential fluctuations, and at the same time, preventing the discharge phenomenon caused by the potential difference between the upper cover 31 and the ground or other equipment, and protecting the camera module from damage. It should be understood that there can be multiple conductive inserts 38 in the driving device 3 for grounding after contacting the upper cover 31. In addition, if a position sensing element is added to the driving device 3, it is necessary to add a conductive insert 38 electrically connected to the position sensing element. Therefore, at least three conductive inserts 38 need to be provided in the driving device 3. Specifically, each conductive insert 38 is arranged at intervals from each other to avoid short circuit caused by contact between multiple conductive inserts 38.

[0087] Furthermore, if Fig.14 , Fig.15As shown, the conductive insert 38 includes a fixing portion 381 embedded in the base 32 and a pin 382 extending in a direction perpendicular to the fixing portion 381, wherein at least one conductive insert 38 is a grounding insert, the fixing portion 381 of the grounding insert is not electrically connected to the conductive portion 37, and is only used to ground the upper cover 31, the fixing portion 381 of the remaining conductive inserts 38 is electrically connected to the conductive portion 37, and the pin 382 of the conductive insert 38 is connected to the external photosensitive component 2, and is used to achieve electrical connection between the conductive portion 37 and the external photosensitive component 2. In some embodiments, the conductive insert 38 can be electrically connected to the conductive portion 37 and the photosensitive component 2 by solder welding, and of course, it can also be electrically connected by other methods, such as wire bonding, thermocompression bonding, plug-in connection, and ultrasonic welding. The fixing portion 381 and the pin 382 can be integrally formed.

[0088] Preferably, the fixing portion 381 extends in a direction perpendicular to the Z axis, and the pin 382 is bent downward from one end of the fixing portion 381 and extends in a direction parallel to the Z axis.

[0089] like Fig.13 As shown, the bottom surface of the base 32 includes a first side 321, a second side 322, a third side 323 and a fourth side 324, the first side 321 is opposite to the first side 331 of the carrier 33, the second side 322 is opposite to the second side 332 of the carrier 33, the third side 323 is opposite to the third side 333 of the carrier 33, and the fourth side 324 is opposite to the fourth side 334 of the carrier 33. Preferably, the fixing portions 381 of each conductive insert 38 are arranged side by side on the second side 322 of the bottom surface of the base 32, and the pins 382 of each conductive insert 38 extend downward from the second side 322 of the bottom surface of the base 32.

[0090] Furthermore, if Fig.14 As shown, at least one conductive insert 38 also includes an extension portion 383 extending along the bottom surface of the base 32, and the extension portion 383 is suitable for achieving grounding by contacting with the upper cover 31, that is, the extension portion 383 of the conductive insert 38 becomes the grounding pin of the upper cover 31, and the conductive insert 38 is connected to the ground electrode of the circuit board on the photosensitive component 2, so that the upper cover 31 is grounded. Furthermore, the extension portion 383 extends in the base 32, which is also conducive to increasing the structural strength of the base 32.

[0091] Preferably, among the conductive inserts 38 arranged side by side, the conductive inserts 38 at the two ends are end conductive inserts 3801, and the conductive insert 38 between the two end conductive inserts 3801 is a middle conductive insert 3802. The middle conductive insert 3802 is not provided with an extension portion 383, and at least one end conductive insert 3801 has an extension portion 383. When the end conductive inserts 3801 extend outward, there is no need to bypass the middle conductive insert 3802, thereby avoiding increasing the size of the driving device 3 along the Y-axis direction.

[0092] In a specific embodiment, both end conductive inserts 3801 have an extension portion 383, wherein the extension portion 383 of one end conductive insert 3801 extends from the second side 322 of the bottom surface of the base 32 to the first side 321, the fourth side 324, and the third side 323 in sequence, or extends from the second side 322 of the bottom surface of the base 32 to the third side 323, the fourth side 324, and the first side 321 in sequence. Fig.14 The end conductive insert 3801 on the left side. The extension portion 383 of the other end conductive insert 3801 extends along the second side edge 322 of the bottom surface of the base 32, as shown in FIG. Fig.14 The end conductive insert 3801 on the right side of the middle.

[0093] Further, the extension portion 383 extends outward at each corner position of the base 32 to form a grounding contact portion 3831 for contacting the upper cover 31 to ground the upper cover 31, and a non-grounding contact portion 3832 that only extends outward and does not contact the upper cover 31. It is worth mentioning that the corner positions of the base 32 refer to the positions where the first side 321 intersects with the second side 322, the positions where the second side 322 intersects with the third side 323, the positions where the third side 323 intersects with the fourth side 324, and the positions where the fourth side 324 intersects with the first side 321. The corner positions refer to Fig.14 The area indicated by the dotted circle.

[0094] Specifically, Fig.14 , Fig.15 As shown, one end conductive insert 3801 with a longer extension portion 383 extends outwardly at the first corner position C along its extension direction to form a grounding contact portion 3831 and a non-grounding contact portion 3832, extends outwardly at the second corner position D to form a grounding contact portion 3831 and a non-grounding contact portion 3832, extends outwardly at the third corner position E to form a grounding contact portion 3831 and a non-grounding contact portion 3832, and extends outwardly at the fourth corner position F to form a grounding contact portion 3831 and a non-grounding contact portion 3832, and the other end conductive insert 3801 with a shorter extension portion 383 extends outwardly at the fourth corner position F to form a non-grounding contact portion 3832.

[0095] In some embodiments, Fig.16 As shown, at least one conductive insert 38 is not electrically connected to the conductive part 37, and is only used to contact the upper cover 31 to ground the upper cover 31. The other conductive inserts 38 realize electrical conduction between the driving device 3 and the photosensitive component 2 by being electrically connected to the conductive part 37. Specifically, the I²C bus interface lines used for communication on the conductive part 37 include SDA (data line), SCL (clock line), GND (ground line) and VDD (positive power supply). Among them, SDA is used to transmit data; SCL is used to synchronize data transmission and control the rate of data transmission; the GND ground line is the reference of all signals in the circuit to ensure the stability and accuracy of the signal; the VDD power supply positive electrode is used to provide power to the sensor or coil. Since the conductive insert 38 is electrically connected to the photosensitive component 2, the conductive part 37 can provide power to the photosensitive component 2 through the conductive insert 38 and transmit data to the photosensitive component 2.

[0096] Furthermore, if Figure 3 As shown, the present application also provides a camera module with the above-mentioned driving device 3, and the camera module includes an optical lens 1, a driving device 3 and a photosensitive component 2. Among them, the optical lens 1 is held on the photosensitive path of the photosensitive component 2 by the driving device 3, and the photosensitive component 2 is used to receive the light emitted by the optical lens 1 for imaging to obtain an image of the subject. The driving device 3 is suitable for driving the optical lens 1 to move to achieve optical performance adjustment.

[0097] Furthermore, the optical lens 1 has an optical axis, the direction of the optical axis is parallel to the Z-axis direction of the camera module, and the photosensitive component 2 is arranged opposite to the optical lens 1 along the optical axis.

[0098] In some embodiments, the optical lens 1 includes a lens barrel 11 and at least one optical lens 12 installed in the lens barrel 11, and the at least one optical lens 12 is arranged in the lens barrel 11 along the optical axis. The optical lens 1 is installed on the carrier 33 of the driving device 3 through the lens barrel 11.

[0099] In some embodiments, the lens barrel 11 and the carrier 33 of the optical lens 1 are integrally formed, which is equivalent to at least one lens being directly installed in the carrier 33 having the function of the lens barrel 11, which can further reduce the lateral dimensions of the driving device 3 in the X-axis direction and the Y-axis direction.

[0100] Furthermore, the photosensitive component 2 includes an imaging circuit board 24, a photosensitive chip 21 electrically connected to the imaging circuit board 24, and at least one electronic component 25. The photosensitive chip 21 is used to receive the light reflected by the subject collected by the optical lens 1 for imaging and is electrically connected to other electronic devices through the imaging circuit board 24.

[0101] In some embodiments, the electronic component 25 may be one or more passive electronic devices such as resistors and capacitors, or one or more active electronic devices such as driver chips and memory chips.

[0102] In some embodiments, the photosensitive component 2 includes a filter element 22, which is held on the photosensitive path of the photosensitive chip 21, so as to filter the imaging light incident on the photosensitive chip 21, and filter out the light that is not necessary for imaging, such as infrared light, in the incident light. Further, the photosensitive component 2 also includes a bracket 23, and the filter element 22 is mounted on the bracket 23, and the bracket 23 is fixed to the imaging circuit board 24, so that the filter element 22 is fixed to the imaging circuit board 24 through the bracket 23.

[0103] In some embodiments, the driving device 3 can be fixed to the photosensitive component 2 by being fixed to the bracket 23. The stress is transmitted by the bracket 23, so that the photosensitive component 2 can avoid being directly subjected to the impact force of the driving device 3. In other embodiments, the driving device 3 can also be fixed to the photosensitive component 2 by being fixed to the imaging circuit board 24. In this case, the bracket 23 is retracted relative to the edge of the imaging circuit board 24 to provide a fixed position for the driving device 3, reduce the space occupied by the bracket 23, and make the entire device more compact.

[0104] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A driving device, characterized in that: include: Base; A carrier, wherein the carrier has a light-through hole extending along the optical axis, and the carrier has a first corner and a second corner at diagonal positions; A support assembly, comprising a first guide and a second guide disposed on the base and extending along the optical axis, wherein the first guide is located at the first corner, and the second guide is located at the second corner, and the carrier is movably supported on the base by the support assembly at the first corner and the second corner; as well as A driving assembly, wherein the driving assembly includes a first driving part and a second driving part arranged on two adjacent sides of the carrier, the first driving part and the second driving part are used to drive the carrier to move along the optical axis relative to the base, and the first driving part and the second driving part are arranged on both sides of the first corner.

2. The driving device according to claim 1, characterized in that: The number of contact surfaces between the carrier and the first guide is greater than the number of contact surfaces between the carrier and the second guide.

3. The driving device according to claim 2, characterized in that: The number of contact surfaces between the carrier and the first guide is two, and the number of contact surfaces between the carrier and the second guide is one.

4. The driving device according to claim 3, characterized in that: The carrier has a first contact surface and a second contact surface that are not coplanar at the first corner, the first guide member is in contact with the first contact surface and the second contact surface, the carrier has a third contact surface at the second corner, the second guide member is in contact with the third contact surface, the central axis of the first guide member along the optical axis direction and the central axis of the second guide member along the optical axis direction are connected to form a supporting surface, the third contact surface is parallel to the supporting surface, the angle between the first contact surface and the supporting surface is θ1, the angle between the second contact surface and the supporting surface is θ2, θ1≠90°, θ2≠90°.

5. The driving device according to claim 4, characterized in that: There are at least two contact positions between the first guide member and the first contact surface spaced apart along the optical axis direction, there are at least two contact positions between the first guide member and the second contact surface spaced apart along the optical axis direction, and there is only one contact position between the second guide member and the third contact surface; θ1=θ2.

6. The driving device according to claim 5, characterized in that: The support assembly further includes a first magnetic member and a second magnetic member. A surface of the second magnetic member facing the second guiding member is parallel to the third contact surface, and a surface of the first magnetic member is parallel to the first contact surface of the first guiding member.

7. The driving device according to claim 6, characterized in that: The first guide member and the second guide member are guide rods.

8. The driving device according to any one of claims 1 to 7, characterized in that: The first driving unit includes a first magnet and a first coil that are arranged opposite to each other, the first magnet is arranged on one of the carrier or the base, and the first coil is arranged on the other of the carrier or the base; the second driving unit includes a second magnet and a second coil that are arranged opposite to each other, the second magnet is arranged on one of the carrier or the base, and the second coil is arranged on the other of the carrier or the base.

9. The driving device according to claim 8, characterized in that: The support assembly also includes a first magnetic member and a second magnetic member, the first magnetic member and the first coil are arranged on the same side, there is a first magnetic attraction force between the first magnetic member and the first magnet, the second magnetic member and the second guide member are arranged at the second corner opposite to each other, there is a second magnetic attraction force between the second guide member and the second magnetic member.

10. The driving device according to claim 9, characterized in that: The angle between the direction of the first magnetic attraction force and the direction of the second magnetic attraction force is an acute angle or an obtuse angle.

11. The driving device according to claim 9, characterized in that: The first magnet and the second magnet are arranged on the carrier, the base includes a conductive part arranged around the side wall of the base, the conductive part extends to a position opposite to the first driving part and the second driving part, the first coil and the second coil are arranged on the base and connected to the conductive part, and the first magnetic part is located on the other side of the conductive part opposite to the first coil.

12. The driving device according to claim 11, characterized in that: The base further comprises a position sensor arranged opposite to the second magnetic member, the second magnetic member is arranged on the carrier, the second magnetic member is suitable for providing a magnetic field, and the position sensor is used to detect changes in the magnetic field of the second magnetic member.

13. The driving device according to claim 12, characterized in that: The size of the second magnetic member at one end close to the position sensor is larger than the size of the end far from the position sensor, and the second magnetic member has at least two magnetic poles on a side facing the position sensor.

14. The driving device according to claim 12, characterized in that: The carrier also includes a first side surface and a second side surface located on both sides of the first corner, and a third side surface and a fourth side surface located on both sides of the second corner, the first side surface is adjacent to the fourth side surface, the second side surface is adjacent to the third side surface, the first driving unit is arranged at an end of the first side surface close to the fourth side surface, the second driving unit is arranged at an end of the second side surface close to the third side surface, and the position sensor is arranged on the third side surface.

15. The driving device according to claim 14, characterized in that: The first driving portion is disposed at an end of the first side surface close to the fourth side surface, and the second driving portion is disposed at an end of the second side surface close to the third side surface.

16. The driving device according to claim 14, characterized in that: The conductive part is disposed around the first side surface, the second side surface and the third side surface of the carrier, and the conductive part is not disposed outside the fourth side surface.

17. The driving device according to claim 16, characterized in that: It also includes at least three conductive inserts arranged on the base, each of which is arranged at intervals from each other, and the conductive insert includes a fixing portion embedded in the base and a pin extending in a direction perpendicular to the fixing portion. At least one of the conductive inserts also includes an extension portion extending along the bottom surface of the base.

18. The driving device according to claim 17, characterized in that: The driving device further comprises an upper cover arranged on the base, wherein the upper cover and the base form a receiving cavity, and the carrier, the supporting assembly and the driving assembly are arranged in the receiving cavity so that the upper cover is grounded through the extending portion.

19. The driving device according to claim 18, characterized in that: The bottom surface of the base includes a first side, a second side, a third side and a fourth side which are arranged in sequence, the fixing portions of the conductive inserts are arranged side by side on the second side of the base, and at least one of the conductive inserts located at both ends extends to both sides to form the extension portions, the extension portions extend from the second side to the third side, the fourth side and the first side in sequence, or extend from the second side to the first side, the fourth side and the third side in sequence, and the extension portions extend outward at each corner position of the base to form a grounding contact portion for contacting the upper cover.

20. A camera module, characterized in that: include: Optical lens; A photosensitive component, arranged opposite to the optical lens along the optical axis, for receiving the light emitted by the optical lens for imaging, so as to obtain an image of the object; as well as According to the driving device as described in any one of claims 1-19, the optical lens is held on the photosensitive path of the photosensitive component by the driving device, and the driving device is suitable for driving the optical lens to move along the optical axis direction to achieve optical performance adjustment.

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