Sliding Focus Driving Device, Lens Module and Electronic Device

Abstract

The present application provides a sliding focus driving device, a lens module and an electronic device, including a bracket, a driving component and a mounting base for mounting a lens; the driving component includes a driving coil and a driving magnet, both the driving coil and the driving magnet are located on the first side surface of the mounting base, and the first side surface is parallel to the optical axis of the lens when the lens is mounted on the mounting base. A guiding portion is provided on the bracket, the mounting base is mounted on the guiding portion, the driving coil and the driving magnet are arranged corresponding to each other and can perform relative movement with the driving magnet when energized, so as to drive the mounting base to slide relative to the bracket along the guiding portion in the direction of the optical axis of the lens. The bracket and the guiding portion are integrally formed by an injection molding process. The sliding focus driving device of the present application has the advantages of fewer components and simple structure, which is beneficial to improving the integrity of the sliding focus driving device and helps to reduce the production cost.

Description

Technical Field

[0001] The present application relates to the field of camera technology, and in particular, to a sliding focusing drive device, a lens module, and an electronic device. Background Art

[0002] With the update and iteration of electronic devices, users have higher and higher requirements for the photography and camera functions of electronic devices. An autofocus camera has become one of the essential components in electronic devices.

[0003] In the prior art, a reed-type autofocus motor can be used to drive the lens to focus. The deformation ability of the reed is used to drive and support the focusing movement of the lens. However, due to the limitation of the elastic coefficient of the reed (i.e., the k value), it is difficult to increase the focusing stroke. To increase the focusing stroke of the lens, a ball-type autofocus motor can be used to drive the lens to focus in the prior art. The relative movement between multiple balls and the lens is used to drive the lens to focus. Such a structure gets rid of the limitation of the elastic coefficient of the reed-type autofocus motor and can increase the focusing stroke of the lens to a certain extent. However, the structure with multiple balls has many parts and a complex structure.

[0004] It can be seen that the prior art has the problem that it is difficult to balance a large focusing stroke and a simple structure of the lens. Summary of the Invention

[0005] The embodiments of the present application provide a sliding focusing drive device, a lens module, and an electronic device, which solve the problem in the prior art that it is difficult to balance a large focusing stroke and a simple structure of the lens.

[0006] The present application provides a sliding focusing drive device, including a bracket, a drive assembly, and a mounting base for mounting a lens. The drive assembly includes a drive coil and a drive magnet. Both the drive coil and the drive magnet are located on the first side of the mounting base, and the first side is parallel to the optical axis of the lens when the lens is mounted on the mounting base. A guiding portion is provided on the bracket, and the mounting base is mounted on the guiding portion. The drive coil and the drive magnet are arranged corresponding to each other and can perform relative movement with the drive magnet when energized, so as to drive the mounting base to slide relative to the bracket along the guiding portion in the direction of the optical axis of the lens. The bracket and the guiding portion are integrally formed by an injection molding process.

[0007] The sliding focusing drive device of the present application uses a drive magnet provided on the first side of the mounting base and a drive coil correspondingly arranged with the drive magnet as a drive component, enabling the sliding focusing drive device of the present application to get rid of the limitation that the reed-type focusing motor in the prior art is difficult to increase the focusing stroke due to the limitation of the elastic coefficient, which is beneficial to increasing the focusing stroke of the drive device. Moreover, the present application provides a guiding effect on the relative movement of the mounting base and the bracket through a guiding portion integrally formed with the bracket by injection molding, which can improve the stability and reliability of the sliding of the mounting base. Further, since the drive magnet and the drive coil in the present application are arranged on one side (i.e., on the first side of the mounting base), and the guiding portion is integrally formed on the bracket by injection molding process, therefore, the sliding focusing drive device of the present application has the advantages of fewer components and simple structure, which is beneficial to improving the integrity of the sliding focusing drive device and helps to reduce the production cost.

[0008] In some possible embodiments, the arrangement direction of the magnetic poles in the drive magnet is consistent with the sliding direction of the mounting base, and the drive coil is parallel to the surface of the drive magnet.

[0009] In some possible embodiments, the drive magnet uses a single-sided bipolar magnet or a single-sided multi-pole magnet.

[0010] In some embodiments, there are multiple guiding portions, and the multiple guiding portions are symmetrically distributed on both sides of the lens optical axis. The symmetrically arranged guiding portions help to improve the balance of the mounting base, make the mounting base slide more smoothly, and help to improve the anti-shake performance of the focusing drive device.

[0011] In some embodiments, the guiding portion is semi-cylindrical or hemispherical.

[0012] In some embodiments, at least one first guiding groove is provided on the side of the mounting base opposite to the guiding portion, at least part of the multiple guiding portions are engaged with at least one first guiding groove, and at least one first guiding groove extends along the lens optical axis direction, and the mounting base can be driven to slide along the corresponding guiding portion through at least one first guiding groove.

[0013] In the sliding focusing drive device of the embodiment of the present application, a first guiding groove corresponding to the guiding portion is provided on the mounting base, and the mounting base can be engaged with the first guiding groove through the guiding portion, which can avoid shaking and skew during the movement, thereby improving the stability and reliability during the sliding of the mounting base and effectively improving the anti-shake performance when the lens focuses.

[0014] In some embodiments, the cross-sectional shape of the first guiding groove is V-shaped, and the guiding portion engaged with the first guiding groove abuts against the groove wall of the first guiding groove.

[0015] The sliding focusing driving device according to the embodiment of the present application can engage with a corresponding guiding portion through a first guiding groove having a V-shaped cross-sectional shape, and thus can accurately position the guiding portion and the position of the bracket, which is beneficial to improving the assembly accuracy and assembly efficiency of the focusing driving device.

[0016] In some embodiments, at least one second guiding groove is provided on a side of the mounting base opposite to the guiding portion, at least a part of the plurality of guiding portions is mounted in at least one second guiding groove, at least one second guiding groove extends along the lens optical axis direction, and the mounting base can be driven to slide along the corresponding guiding portion through at least one second guiding groove. Along a direction perpendicular to the lens optical axis, the width of the second guiding groove is greater than the width of the guiding portion mounted therein.

[0017] In the sliding focusing driving device according to the embodiment of the present application, a first guiding groove and a second guiding groove corresponding to the guiding portion are provided on the mounting base, and the mounting base can further improve the stability and reliability of the sliding process of the mounting base through the mutual cooperation of the guiding portion, the first guiding groove and the second guiding groove, and effectively improve the anti-shake performance when the lens focuses.

[0018] In some embodiments, the cross-sectional shape of the second guiding groove is U-shaped or L-shaped, and the guiding portion mounted in the second guiding groove is spaced from the side wall of the second guiding groove.

[0019] Adopting a second guiding groove with a U-shaped or L-shaped cross-sectional shape can, on the one hand, cooperate with the first guiding groove to guide and position the mounting base, improving the stability and reliability of the sliding process of the mounting base. On the other hand, since the width of the second guiding groove is greater than the width of the guiding portion mounted therein (or can be understood as the width along the direction perpendicular to the lens optical axis), it can provide a certain installation margin (or can be understood as a tolerance space) for the assembly of the bracket and the mounting base, which helps to improve the assembly efficiency of the focusing driving device.

[0020] In some embodiments, a driving magnet is provided on the mounting base, and the sliding focusing driving device further includes a magnetic attracting member. The magnetic attracting member is provided on the bracket and can be magnetically attracted to the driving magnet so that the mounting base is attached to the guiding portion of the bracket.

[0021] The sliding focusing driving device according to the embodiment of the present application magnetically attracts the bracket to the driving magnet through the magnetic attracting member, which can make the mounting base always press against the guiding portion of the bracket during the sliding process, and thus can ensure smooth sliding and improve the stability of the focusing driving device.

[0022] In some embodiments, the sliding focusing driving device further includes a position sensor and a driving controller;

[0023] The position sensor is installed on the mounting base to detect the real-time position of the mounting base and feed back the real-time position to the drive controller. The drive controller is electrically connected to the position sensor and the drive component to receive the real-time position fed back by the position sensor and control the drive component to drive the mounting base to slide according to the real-time position.

[0024] The sliding focus drive device of the embodiment of the present application can detect the real-time position of the mounting base through a position sensor and feed back the real-time position to the drive controller. The drive controller controls the action of the drive component according to the real-time position to form a closed-loop drive control cycle to control the sliding of the mounting base, which can effectively improve the accuracy of the sliding position of the mounting base and help improve the focusing accuracy of the lens.

[0025] In some possible embodiments, the driving magnet includes a first magnetic pole and a second magnetic pole disposed opposite to each other, and the position sensor is disposed at the junction of the first magnetic pole and the second magnetic pole.

[0026] In some possible embodiments, the position sensor is located on a side of the driving coil facing the mounting base, or on a side of the driving coil facing away from the mounting base.

[0027] In some embodiments, the sliding focus driving device further includes an anti-shake component, and the anti-shake component includes a first coil, a second coil, a first magnet, and a second magnet.

[0028] The first coil is arranged corresponding to the first magnet and can move relative to the first magnet when powered on, so as to drive the mounting base to move in the first direction. The second coil is arranged corresponding to the second magnet and can move relative to the second magnet when powered on, so as to drive the mounting base to move in the second direction. The first direction, the second direction and the lens optical axis direction are perpendicular to each other.

[0029] The sliding focus drive device of the embodiment of the present application utilizes the first coil, the first magnet, the second coil, and the second magnet to enable the mounting base to move in the first direction and the second direction. Since the first direction, the second direction, and the optical axis of the lens are perpendicular to each other, the movement of the mounting base in the first direction and / or the second direction is restrained, that is, the mounting base is prevented from shaking in the first direction and / or the second direction, which can further improve the stability and anti-shake performance of the focus drive device.

[0030] In some embodiments, the first coil and the second coil are located in the same plane, and the plane where the first coil and the second coil are located is perpendicular to the optical axis of the lens.

[0031] In some possible embodiments, the first coil and the second coil are distributed at right angles.

[0032] In some embodiments, the plane where the first coil is located and the plane where the second coil is located are both parallel to the optical axis of the lens.

[0033] The present application also provides a lens module, which includes the sliding focusing drive device involved in the above-mentioned embodiments and a lens, and the lens is mounted on the mounting base of the sliding focusing drive device.

[0034] For the lens module of the embodiment of the present application, since the sliding focusing drive device adopted by it has the advantages of good focusing stability, simple structure and low cost, the lens module of the embodiment of the present application has the advantages of good focusing stability, simple structure and low cost.

[0035] The present application also provides an electronic device, which includes the lens module mentioned in the above-mentioned embodiments.

[0036] For the electronic device of the embodiment of the present application, since the lens module adopted by it has the advantages of good focusing stability, simple structure and low cost, the electronic device of the embodiment of the present application has the advantages of simple structure, low cost and better shooting performance. Description of the Drawings

[0037] Figure 1 It is a partial three-dimensional structural schematic diagram of the sliding focusing drive device of the embodiment of the present application;

[0038] Figure 2a It is a partial planar structural schematic diagram of the sliding focusing drive device of the embodiment of the present application;

[0039] Figure 2b is Figure 2a a partial enlarged structural schematic diagram of area A1 in

[0040] Figure 3a It is a partial three-dimensional structural schematic diagram of the sliding focusing drive device of the embodiment of the present application, wherein the bracket is hidden and not shown;

[0041] Figure 3b is Figure 3a a partial enlarged structural schematic diagram of area A3 in

[0042] Figure 4a It is a partial three-dimensional structural schematic diagram of the sliding focusing drive device of the embodiment of the present application, wherein the mounting base is hidden and not shown;

[0043] Figure 4b is Figure 4a a partial enlarged structural schematic diagram of area A4 in

[0044] Figure 5 It is a structural schematic diagram of the drive assembly in the sliding focusing drive device of the embodiment of the present application, wherein the drive assembly adopts a single-sided bipolar structure;

[0045] Figure 6Schematic structural diagram of the driving component in the sliding focus driving device according to the embodiment of the present application; wherein, the driving component adopts a single-sided multi-pole structure;

[0046] Figure 7a Partial perspective structural diagram of the sliding focus driving device according to the embodiment of the present application, wherein the mounting base and the driving component are hidden and not shown;

[0047] Figure 7b Is Figure 7a Partial enlarged structural diagram of area A2 in

[0048] Figure 8 Partial perspective structural diagram of the bracket in the sliding focus driving device according to the embodiment of the present application;

[0049] Figure 9 Partial perspective structural diagram of the sliding focus driving device according to the embodiment of the present application, wherein the position sensor is installed on the mounting base;

[0050] Figure 10a Partial perspective structural diagram of the sliding focus driving device according to the embodiment of the present application, wherein the first coil and the second coil are in the same plane, and both the first magnet and the second magnet are single-sided single-pole magnets;

[0051] Figure 10b Partial perspective structural diagram of the sliding focus driving device according to the embodiment of the present application, wherein the first coil and the second coil are in the same plane, and both the first magnet and the second magnet are single-sided double-pole magnets;

[0052] Figure 10c Partial perspective structural diagram of the sliding focus driving device according to the embodiment of the present application, wherein the first magnet and the second magnet are in different planes;

[0053] Figure 11 Stereo structural diagram of the lens module according to the embodiment of the present application.

[0054] Explanation of reference numerals:

[0055] 1: Sliding focus driving device;

[0056] 10: Housing; 11: Mounting base; 111: First side; 111A: First guide groove; 111B: Second guide groove; 12: Bracket; 120: Mounting hole; 121: Guide part; 122: Guide part; 123: Guide part; 124: Guide part; 13: Driving component; 131: Driving coil; 132: Driving magnet; 1321: First magnetic pole; 1322: Second magnetic pole; 14: Magnetic attraction part; 15: Position sensor;

[0057] 16: Anti-shake component; 161: First coil; 162: Second coil; 163: First magnet; 164: Second magnet;

[0058] F1: First direction; F2: Second direction; M: Lens optical axis; S1: Interface; N: Axis of symmetry;

[0059] 2: Lens module;

[0060] 20: Lens; 21: Circuit board. Detailed implementation mode

[0061] The following specific embodiments illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Although the description of the present application will be introduced in combination with some embodiments, this does not mean that the features of this application are limited to this implementation manner. On the contrary, the purpose of introducing the application in combination with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the key points of the present application, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0062] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0063] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0064] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0065] In the description of the present application, it should be understood that in the present application, "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines such as copper foils or wires of a printed circuit board (PCB) that can transmit electrical signals. "Communication connection" can refer to the transmission of electrical signals, including wireless communication connections and wired communication connections. Wireless communication connections do not require a physical medium and do not belong to the connection relationship that limits the product structure.

[0066] To make the objectives, technical solutions, and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0067] The present application is applicable to various electronic devices with variable-focus cameras, such as smartphones, tablet computers, cameras, action cameras, smart watches, etc.

[0068] Please refer to Figures 1 to 3b , Figure 1 , which is a partial perspective structural view of the sliding focus driving device according to an embodiment of the present application, Figure 2a , which is a partial planar structural view of the sliding focus driving device according to an embodiment of the present application, Figure 2b is Figure 2a a partial enlarged structural view of the A1 area in Figure 3a , which is a partial perspective structural view of the sliding focus driving device according to an embodiment of the present application, where the bracket is hidden and not shown, Figure 3b is Figure 3a a partial enlarged structural view of the A3 area in

[0069] As Figures 1 to 3b shown, the present application provides a sliding focus driving device 1, including a bracket 12, a driving component 13, and a mounting base 11 for mounting a lens 20 (see Figure 11 ). As Figure 3a and Figure 3b shown, the driving component 13 includes a driving coil 131 and a driving magnet 132. Both the driving coil 131 and the driving magnet 132 are located on the first side surface 111 of the mounting base 11, and the first side surface is parallel to the lens 20 (seeFigure 11 ) The lens optical axis M when installed on the mounting base 11. The first side can be, for example, the upper side, lower side, left side or right side of the mounting base 11 when viewed along the direction of the lens optical axis M.

[0070] The bracket 12 is provided with guiding parts (such as guiding part 121 and guiding part 122), the mounting base 11 is installed on the guiding parts (such as guiding part 121 and guiding part 122), the driving coil 131 and the driving magnet 132 are correspondingly arranged and can perform relative movement when electrified with respect to the driving magnet 132, so as to drive the mounting base 11 to slide relative to the bracket 12 along the guiding parts (such as guiding part 121 and guiding part 122) in the direction of the lens optical axis M. The bracket 12 and the guiding parts (such as guiding part 121 and guiding part 122) are integrally formed by an injection molding process.

[0071] Those skilled in the art can understand that the injection molding integral forming process (or can be called the injection molding process) refers to the process of making semi-finished parts of a certain shape by operations such as pressurizing, injecting, cooling, and separating the molten raw materials. Therefore, the present application does not limit the materials of the bracket 12 and the guiding parts (such as guiding part 121 and guiding part 122). As long as the materials can be processed and formed by the injection molding integral forming process, they do not deviate from the scope of the embodiments of the present application. For example, they can be polystyrene, polypropylene, polycarbonate, etc.

[0072] Please refer to Figures 3a to 4b Understand, Figure 4a It is a partial three-dimensional structural schematic diagram of the sliding focusing drive device according to the embodiment of the present application, wherein the mounting base is hidden and not shown. Figure 4b It is Figure 4a The partial enlarged structural schematic diagram of the A4 area in

[0073] The relative movement between the driving coil 131 and the driving magnet 132 can be understood as that one of them is fixed and the other moves relative to it. For example, in one embodiment, please refer to Figure 3b 、 Figure 4b , and in combination with Figure 1 and Figure 2bIt is understood that the driving coil 131 is arranged on the bracket 12 and is fixed. The driving magnet 132 is arranged on the first side of the mounting base 11. When powered on, the magnetic force generated by the driving coil 131 and the driving magnet 132 causes the driving magnet 132 to move relative to the driving coil 131 and drive the mounting base 11 to slide along the lens optical axis M. In other alternative embodiments, the driving coil 131 can also be arranged on the mounting base 11, and the driving magnet 132 can be arranged on the bracket 12 and fixed. Then, the magnetic force generated between the two causes the driving coil 131 to move relative to the driving magnet 132 and drive the mounting base 11 to slide along the lens optical axis M. As long as relative movement can occur between the driving coil 131 and the driving magnet 132 and the mounting base 11 can be driven to slide along the lens optical axis M, it does not depart from the scope of the embodiments of the present application.

[0074] Furthermore, the cooperation form of the driving coil 131 and the driving magnet 132 is not limited. For example, Figure 5 As shown, the number of driving coils 131 can be one, and the driving magnet 132 is a single-sided bipolar magnet. The driving coil 131 and the driving magnet 132 are arranged face to face. Specifically, in one embodiment, the driving magnet 132 has a first magnetic pole 1321 and a second magnetic pole 1322 connected back to back, and the interface surface S1 between the first magnetic pole 1321 and the second magnetic pole 1322 is located within the annular structure of the driving coil 131. Or it can be understood that the driving coil 131 is an axisymmetric structure, and the first magnetic pole 1321 and the second magnetic pole 1322 are symmetrically arranged about a symmetry axis N of the driving coil 131. In one embodiment, the interface surface S1 between the first magnetic pole 1321 and the second magnetic pole 1322 coincides with a symmetry axis N of the driving coil 131. In other alternative embodiments, as Figure 6 shown, the number of driving coils 131 can also be multiple, and the multiple driving coils 131 are arranged in parallel. Correspondingly, the driving magnet 132 can be, for example, a single-sided multi-pole magnet. Specifically, the driving magnet 132 can, for example, have two first magnetic poles 1321 and two second magnetic poles 1322. One first magnetic pole 1321 and one second magnetic pole 1322 form a group, and the two groups of magnetic poles are arranged in parallel. Each group of magnetic poles is arranged face to face with a corresponding driving coil 131.

[0075] Among them, the driving coil 131 and the driving magnet 132 being arranged face to face can be understood as the driving coil 131 being arranged parallel to the surface of the driving magnet 132.

[0076] Those skilled in the art can understand that a single-sided magnet can be understood as a magnet with a stronger magnetic force on one side and a weaker magnetic force on the other side. A magnetic pole is the part of a magnet with the strongest magnetic force. A magnet usually has two magnetic poles. One magnetic pole points to the south and is called the south pole (S pole), and the other magnetic pole points to the north and is called the north pole (N pole).

[0077] In one embodiment, please refer to Figure 5 , Figure 6 and Figure 1 for understanding. The arrangement direction of the magnetic poles (such as the first magnetic pole 1321 and the second magnetic pole 1322) in the driving magnet 132 is consistent with the sliding direction of the mounting base, or it can be understood that the arrangement direction of the magnetic poles (such as the first magnetic pole 1321 and the second magnetic pole 1322) in the driving magnet 132 is parallel to the lens optical axis M.

[0078] The material of the driving magnet 132 can be, for example, a magnet. In other alternative embodiments, it can also be other materials that can be coupled with the coil magnetic field.

[0079] It should be noted that the parallel and perpendicular mentioned in this application are not strict mathematical concepts, and a certain angle deviation is allowed, which can be understood as approximately parallel and approximately perpendicular.

[0080] For the sliding focusing drive device 1 of this application, the driving magnet 132 provided on the first side of the mounting base 11 and the driving coil 131 correspondingly arranged with the driving magnet 132 are used as the driving component 13, so that the sliding focusing drive device 1 of this application gets rid of the limitation that the focusing stroke of the leaf spring type focusing motor in the prior art is difficult to increase due to the elastic coefficient limitation, which is beneficial to increasing the focusing stroke of the drive device. Moreover, in this application, the guiding parts (such as the guiding part 121 and the guiding part 122) integrally formed by injection molding with the bracket 12 provide a guiding effect on the relative movement of the mounting base 11 and the bracket 12, which can improve the stability and reliability of the sliding of the mounting base. Further, since the driving magnet 132 and the driving coil 131 in this application are arranged on one side (i.e., on the first side 111 of the mounting base), and the guiding parts (such as the guiding part 121 and the guiding part 122) are integrally formed on the bracket 12 by the injection molding process, therefore, the sliding focusing drive device 1 of this application has the advantages of fewer parts and simple structure, which is beneficial to improving the integrity of the sliding focusing drive device 1 and helps to reduce the production cost. And, since in this application, the guiding parts (such as the guiding part 121 and the guiding part 122) and the bracket 12 are integrally formed, it can avoid impact damage to the bracket 12 when falling, which is beneficial to improving the reliability of the internal parts of the focusing drive device when falling.

[0081] It can be seen that the sliding focusing drive device of this application has the advantages of a large focusing stroke and a small moving inclination angle, and at the same time has the advantages of simple structure and low cost, and has excellent market prospects.

[0082] Figure 7a is a partial three-dimensional structural schematic diagram of the sliding focusing drive device of the embodiment of this application, in which the mounting base and the driving component are hidden and not shown. Figure 7b is Figure 7aSchematic diagram of the partial enlarged structure of area A2 Figure 8 Schematic diagram of the partial three-dimensional structure of the bracket in the sliding focus driving device according to the embodiment of the present application

[0083] The number of guiding parts in the present application is not limited. For example, it can be one or multiple, such as 2, 4, or 6, etc. Multiple guiding parts are symmetrically distributed on both sides of the lens optical axis M. In one embodiment, please refer to Figure 7a 、 Figure 7b and in combination with Figure 1 and Figure 2a 、 Figure 2b Understand that the guiding parts are multiple, for example, including guiding part 121 and guiding part 122. Guiding part 121 and guiding part 122 are symmetrically distributed on both sides of the lens optical axis M, or it can be understood that the symmetry axis of guiding part 121 and guiding part 122 is parallel to the lens optical axis M. The symmetrically arranged guiding parts (such as guiding part 121 and guiding part 122) help to improve the balance of the mounting base 11, make the mounting base slide more smoothly, and help to improve the anti-shake performance of the focus driving device

[0084] Furthermore, the shape of the guiding part is not limited. In one embodiment, as shown in Figure 7a and Figure 7b it can be semi-cylindrical. In one embodiment, the guiding part can also be hemispherical, as shown in Figure 8 Guiding part 121, guiding part 122, guiding part 123, and guiding part 124 in the shape of a hemisphere are symmetrically distributed on both sides of the lens optical axis, or it can be understood that the symmetry axes of guiding part 121, guiding part 122, guiding part 123, and guiding part 124 are parallel to the lens optical axis M. In other alternative embodiments, the guiding part can also be cylindrical, spherical, or other shapes. In one embodiment, as shown in Figures 7a to 8 and referring to Figure 3b Understand that the bracket 12 is also provided with a mounting hole 120 for embedding the driving coil 131. The driving coil 131 is installed in the mounting hole 120, and multiple guiding parts (such as guiding part 121 and guiding part 122) are located on both sides of the mounting hole 120

[0085] Please refer to Figures 1 to 3b On the side of the mounting base 11 opposite to the guiding part (such as guiding part 121 and guiding part 122), there is at least one first guiding groove 111A. At least part of the multiple guiding parts is engaged with at least one first guiding groove 111A. At least one first guiding groove 111A extends along the direction of the lens optical axis M, and the mounting base 11 can be driven to slide along the corresponding guiding part (such as guiding part 121) through at least one first guiding groove 111A. Among them, the number and shape of the first guiding groove 111A are not limited. In one embodiment, as shown in Figure 2band Figure 3b As shown in Figure 3b , the cross-sectional shape of the first guiding groove 111A is V-shaped, and the guiding portion 121 is engaged in the first guiding groove 111A. Specifically, the guiding portion 121 abuts against the groove wall of the first guiding groove 111A.

[0086] In the sliding focusing driving device 1 according to the embodiment of the present application, a first guiding groove 111A corresponding to the guiding portion (such as the guiding portion 121) is provided on the mounting base 11. The mounting base 11 can be engaged with the first guiding groove 111A through the guiding portion (such as the guiding portion 121), which can avoid shaking and skew during the movement, reduce the dynamic inclination angle of the focusing driving device, and further improve the stability and reliability of the mounting base 11 during the sliding process, effectively improving the anti-shake performance when the lens focuses. Further, the sliding focusing driving device 1 according to the embodiment of the present application can engage the corresponding guiding portion (such as the guiding portion 121) through the first guiding groove 111A with a V-shaped cross-sectional shape, and then can accurately position the position of the guiding portion (such as the guiding portion 121) and the bracket 12, which is beneficial to improving the assembly accuracy and assembly efficiency of the focusing driving device 1.

[0087] Further, please refer to Figures 1 to 3b , at least one second guiding groove 111B is provided on the side of the mounting base 11 opposite to the guiding portion (such as the guiding portion 121 and the guiding portion 122). At least part of the plurality of guiding portions is installed in at least one second guiding groove 111B. At least one second guiding groove 111B extends along the direction of the lens optical axis M. The mounting base 11 can be driven to slide along the corresponding guiding portion (such as the guiding portion 122) through at least one second guiding groove 111B. Along the direction perpendicular to the lens optical axis M, the width of the second guiding groove 111B is greater than the width of the guiding portion (such as the guiding portion 122) installed therein. Among them, the number and shape of the second guiding grooves 111B are not limited. In one embodiment, as shown in Figure 2b Figure 2bAs shown, the cross-sectional shape of the second guiding groove 111B is L-shaped. Specifically, the guiding portion 122 is spaced from the side wall of the second guiding groove 111B. In other alternative embodiments, the cross-sectional shape of the second guiding groove 111B is U-shaped or other shapes. In the sliding focusing driving device 1 of the embodiment of the present application, the mounting base 11 is provided with a first guiding groove 111A and a second guiding groove 111B corresponding to the guiding portion. The mounting base 11 can further improve the stability and reliability of the sliding process of the mounting base through the mutual cooperation of the guiding portion (such as the guiding portion 121 and the guiding portion 122) and the first guiding groove 111A and the second guiding groove 111B, and effectively improve the anti-shake performance during lens focusing. Further, by using the second guiding groove 111B with a U-shaped or L-shaped cross-sectional shape, on the one hand, it can cooperate with the first guiding groove 111A to play a guiding and positioning role for the mounting base 11, improving the stability and reliability of the mounting base 11 during the sliding process. On the other hand, since the width of the second guiding groove 111B is greater than the width of the guiding portion (such as the guiding portion 122) installed therein (or can be understood as the width in the direction perpendicular to the lens optical axis M), it can provide a certain installation margin (or can be understood as a tolerance space) for the assembly of the bracket 12 and the mounting base 11, which helps to improve the assembly efficiency of the focusing driving device 1.

[0088] Those skilled in the art can understand that the mounting base 11 may also not be provided with the second guiding groove 111B, and the surface of the mounting base 11 facing the guiding portion 122 directly contacts and slides with the guiding portion 122. Such a structure can also be understood as a planar structure, which can also play a supporting role for the guiding portion 122, and there is no limit on the left and right sides of the planar structure, which can provide an installation margin (or can be understood as a tolerance space) for the assembly of the bracket 12 and the mounting base 11.

[0089] In one embodiment, a lubricating material, such as grease, surface coating, etc., is applied between the first guiding groove 111A, the second guiding groove 111B and the corresponding guiding portion. It can reduce the friction during the sliding process, improve the sliding smoothness of the mounting base, reduce power consumption, and improve the control accuracy. The lubricating material can be applied in the first guiding groove 111A and / or the second guiding groove 111B, or can be applied to the guiding portion. The present application does not make any limitations in this regard.

[0090] In one embodiment, please refer to Figure 3b and in combination with Figure 1It is understood that the sliding focus driving device further includes a magnetic attracting member 14. The driving magnet 132 is disposed on the mounting base 11, and the magnetic attracting member 14 is disposed on the bracket 12 and can be magnetically attracted to the driving magnet 132. In one embodiment, the magnetic attracting member 14 is located on the side of the driving coil 131 away from the driving magnet 132. The bracket 12 is magnetically attracted to the driving magnet 132 through the magnetic attracting member 14, so that the mounting base 11 fits against the guiding portions (such as the guiding portion 121 and the guiding portion 122) of the bracket 12. Wherein, the magnetic attracting member 14 can be, for example, a metal member, a magnet, etc. The material of the metal is not limited. For example, it can be a material such as iron, nickel, cobalt, etc. that can be adsorbed by a magnet.

[0091] In the sliding focus driving device according to the embodiment of the present application, the bracket 12 is magnetically attracted to the driving magnet 132 through the magnetic attracting member, which can ensure that the mounting base 11 is always pressed against the guiding portion of the bracket 12 during the sliding process, thereby ensuring smooth sliding and improving the stability of the focus driving device 1.

[0092] In one embodiment, please refer to Figure 9 and combine with Figure 3b to understand that Figure 9 is a partial three-dimensional structural schematic diagram of the sliding focus driving device according to the embodiment of the present application. The sliding focus driving device 1 further includes a position sensor 15 and a driving controller (not shown in the figure);

[0093] The position sensor 15 is installed on the mounting base 11 to detect the real-time position of the mounting base 11 and feed back the real-time position to the driving controller (not shown in the figure). The driving controller (not shown in the figure) is electrically connected to the position sensor 15 and the driving assembly 13 to receive the real-time position fed back by the position sensor 15 and control the driving assembly 13 to drive the mounting base 11 to slide according to the real-time position.

[0094] Specifically, please combine with Figure 5 and Figure 9 to understand that the position sensor 15 can be, for example, disposed at the junction of the first magnetic pole 1321 and the second magnetic pole 1322, or it can be understood that the position sensor 15 is correspondingly disposed with the interface S1 between the first magnetic pole 1321 and the second magnetic pole 1322. The position sensor 15 can be disposed inside the driving coil 131 (or can be understood as the side facing the mounting base 11), or can be disposed outside the driving coil 131 (or can be understood as the side away from the mounting base 11).

[0095] Wherein, the type of the position sensor 15 is not limited. For example, it can be a TMR (tunnel magnetoresistance effect) sensor, a Hall (Hall-effect position sensor) position sensor, etc. In other alternative embodiments, it can also be other sensors capable of detecting the real-time position.

[0096] Please refer to Figures 10a to 10c , Figure 10a which is a partial perspective structural view of the sliding focusing drive device according to an embodiment of the present application, Figure 10b which is a partial perspective structural view of the sliding focusing drive device according to an embodiment of the present application, Figure 10c which is a partial perspective structural view of the sliding focusing drive device according to an embodiment of the present application.

[0097] The sliding focusing drive device 1 according to an embodiment of the present application further includes an anti-shake assembly 16, and the anti-shake assembly 16 includes a first coil 161, a second coil 162, a first magnet 163, and a second magnet 164.

[0098] The first coil 161 and the first magnet 163 are correspondingly arranged and can move relative to the first magnet 163 when energized to drive the mounting base 11 to move in the first direction F1. The second coil 162 and the second magnet 164 are correspondingly arranged and can move relative to the second magnet 164 when energized to drive the mounting base 11 to move in the second direction F2. The first direction F1, the second direction F2, and the lens optical axis M direction are perpendicular to each other.

[0099] In one embodiment, both the first magnet 163 and the second magnet 164 are provided on the mounting base 11, both the first coil 161 and the second coil 162 are provided on the bracket, the first coil 161 and the first magnet 163 are arranged face to face, and the second coil 162 and the second magnet 164 are arranged face to face. In other alternative embodiments, it may also be that the first coil 161 and the second coil 162 are provided on the mounting base 11, both the first magnet 163 and the second magnet 164 are provided on the bracket, the first magnet 163 and the first coil 161 are arranged face to face, and the second magnet 164 and the second coil 162 are arranged face to face.

[0100] Wherein, the number and relative positions of the first coil 161, the second coil 162, the first magnet 163, and the second magnet 164 are not limited. For example, a structure of a single-sided single-pole magnet cooperating with a coil can be adopted, or a structure of a single-sided bipolar magnet cooperating with a coil can be adopted, or a structure of a single-sided multi-pole magnet cooperating with a coil can be adopted. As long as they can cooperate with each other so that the mounting base 11 is restricted in two mutually perpendicular directions of the first direction F1 and the second direction F2 during the sliding process, it does not deviate from the scope of the embodiment of the present application. In one embodiment, as Figure 10a and Figure 10b shown, the first coil 161 and the second coil 162 are in the same plane, and the plane where the first coil 161 and the second coil 162 are located is perpendicular to the lens optical axis M. For example, the first coil 161 and the second coil 162 are distributed at a 90° right angle. In one embodiment, Figure 10aIn the anti-shake component shown, both the first magnet 163 and the second magnet 164 are single-sided single-pole magnets. In one implementation, Figure 10b In the anti-shake component shown, both the first magnet 163 and the second magnet 164 are single-sided double-pole magnets.

[0101] In other alternative implementations, the anti-shake component is located on the side surface of the mounting base 11 parallel to the lens optical axis M. For example, the planes where the first coil 161 and the second coil 162 are located are both parallel to the lens optical axis M. In one implementation, as Figure 10c shown, when viewed along the lens optical axis M, the aforementioned first side surface 111 (i.e., the position where the driving component is located) is on the upper side of the mounting base, and the anti-shake component is on the left side, and / or the right side, and / or the lower side of the mounting base.

[0102] In one implementation, as Figure 10c shown, both the first coil 161 and the first magnet 163 are multiple. A plurality of first coils 161 and a plurality of first magnets 163 are provided on the lower side of the mounting base. Both the second coil 162 and the second magnet 164 are multiple. A plurality of second coils 162 and a plurality of second magnets 164 are distributed on the left side and the right side of the mounting base. Among them, the first magnet 163 and the second magnet 164 can, for example, adopt single-sided double-pole magnets or single-sided multi-pole magnets.

[0103] The sliding focusing drive device 1 of the embodiment of the present application can make the mounting base 11 move in the first direction F1 and the second direction F2 by using the first coil 161, the first magnet 163, the second coil 162, and the second magnet 164. Since the first direction F1, the second direction F2, and the lens optical axis M are perpendicular to each other, it plays a role in restraining the movement of the mounting base in the first direction F1 and / or the second direction F2, that is, preventing the mounting base from shaking in the first direction F1 and / or the second direction F2, and can further improve the stability and anti-shake performance of the focusing drive device 1.

[0104] Please refer to Figure 11 , the present application also provides a lens module 2, including the sliding focusing drive device 1 involved in the above embodiments and a lens 20. The lens 20 is mounted on the mounting base 11 of the sliding focusing drive device 1. The lens module 2 is also provided with a circuit board 21, which can be used for external electrical connection, for example, it can be connected to a power supply, the main board of an electronic device, the controller of the lens module, and so on. The circuit board 21 can, for example, adopt an FPC (Flexible Printed Circuit, flexible circuit board). Further, the lens module 2 further includes a housing 10. The bracket 12 of the sliding focusing drive device is fixedly mounted on the housing 10, and at least part of the sliding focusing drive device is covered inside the housing 10. The lens module 2 can be, for example, a wide-angle lens, a standard lens, a telephoto lens, an ultra-wide-angle lens, and so on.

[0105] For the lens module 2 according to the embodiment of the present application, since the sliding focusing driving device 1 adopted by it has the advantages of good focusing stability, simple structure and low cost, the lens module 2 according to the embodiment of the present application has the advantages of good focusing stability, simple structure and low cost.

[0106] The present application also provides an electronic device, including the lens module 2 involved in each of the above embodiments.

[0107] For the electronic device according to the embodiment of the present application, since the lens module 2 adopted by it has the advantages of good focusing stability, simple structure and low cost, the electronic device according to the embodiment of the present application has the advantages of simple structure, low cost and better shooting performance.

[0108] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

Claims

1. A sliding focus driving device, characterized in that, it includes a bracket, a driving component, and a mounting base for mounting a lens; the driving component includes a driving coil and a driving magnet, both the driving coil and the driving magnet are located on the first side of the mounting base, and the first side is parallel to the optical axis of the lens when the lens is mounted on the mounting base; a guiding portion is provided on the bracket, the mounting base is mounted on the guiding portion, the driving coil and the driving magnet are correspondingly arranged and can move relative to the driving magnet when powered on, so as to drive the mounting base to slide relative to the bracket along the guiding portion in the direction of the optical axis of the lens; the bracket and the guiding portion are integrally formed by an injection molding process; the guiding portion is in a semi-cylindrical shape, there are multiple guiding portions, at least one second guiding groove is provided on the side of the mounting base opposite to the guiding portion, at least part of the multiple guiding portions are mounted in the at least one second guiding groove, the at least one second guiding groove extends along the direction of the optical axis of the lens, and the mounting base can be driven to slide along the corresponding guiding portion through the at least one second guiding groove; a lubricating material is coated between the second guiding groove and the corresponding guiding portion; along the direction perpendicular to the optical axis of the lens, the width of the second guiding groove is greater than the width of the guiding portion mounted therein; the cross-sectional shape of the second guiding groove is U-shaped or L-shaped, and the guiding portion mounted in the second guiding groove is spaced from the side wall of the second guiding groove; the driving magnet is arranged on the mounting base, and the sliding focus driving device further includes a magnetic attracting member, the magnetic attracting member is arranged on the bracket and can magnetically attract the driving magnet, so that the mounting base fits against the guiding portion of the bracket; the sliding focus driving device further includes an anti-shake component, the anti-shake component includes a first coil, a second coil, a first magnet, and a second magnet; the first magnet and the second magnet are both arranged on the mounting base, the first coil and the second coil are both arranged on the bracket, or the first magnet and the second magnet are both arranged on the bracket, and the first coil and the second coil are both arranged on the mounting base; wherein, the first coil and the first magnet are correspondingly arranged and can move relative to the first magnet when powered on, so as to drive the mounting base to move in a first direction, the second coil and the second magnet are correspondingly arranged and can move relative to the second magnet when powered on, so as to drive the mounting base to move in a second direction; the first direction, the second direction, and the direction of the optical axis of the lens are perpendicular to each other.

2. The sliding focus driving device according to claim 1, characterized in that, the multiple guiding portions are symmetrically distributed on both sides of the optical axis of the lens.

3. The sliding focus driving device according to claim 2, characterized in that, On one side of the mounting base opposite to the guiding portion, there is provided at least one first guiding groove. At least a part of the plurality of guiding portions is engaged with the at least one first guiding groove. The at least one first guiding groove extends along the direction of the lens optical axis, and the mounting base can be driven to slide along the corresponding guiding portion through the at least one first guiding groove.

4. The sliding focusing driving device according to claim 3, wherein, the cross-sectional shape of the first guiding groove is V-shaped, and the guiding portion engaged with the first guiding groove abuts against the groove wall of the first guiding groove.

5. The sliding focusing driving device according to any one of claims 1-4, wherein, the sliding focusing driving device further includes a position sensor and a driving controller; the position sensor is mounted on the mounting base to detect the real-time position of the mounting base and feed back the real-time position to the driving controller. The driving controller is electrically connected to the position sensor and the driving component to receive the real-time position fed back by the position sensor and control the driving component to drive the mounting base to slide according to the real-time position.

6. The sliding focusing driving device according to claim 1, wherein, the first coil and the second coil are located in the same plane, and the plane where the first coil and the second coil are located is perpendicular to the lens optical axis.

7. The sliding focusing driving device according to claim 1, wherein, the plane where the first coil is located and the plane where the second coil is located are both parallel to the lens optical axis.

8. A lens module, wherein, it includes the sliding focusing driving device according to any one of claims 1-7 and a lens, and the lens is mounted on the mounting base of the sliding focusing driving device.

9. An electronic device, wherein, it includes the lens module according to claim 8.

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