Lens module and electronic device

Abstract

The application provides a lens module and an electronic device. The lens module comprises a first lens, a second lens, a first driving mechanism and a second driving mechanism. The first lens has a first optical axis, and the second lens has a second optical axis parallel to the first optical axis. The first driving mechanism drives the first lens to move along the first optical axis, and the second driving mechanism drives the second lens to move towards the first optical axis, so that the first optical axis and the second optical axis coincide. In a first state, the thickness of the lens module is a first thickness, and in a second state, the thickness of the lens module is a second thickness, which is greater than the first thickness. By dividing the lens module with multiple lenses into two lenses, and by stretching and moving the two lenses to focus in the second state, the two lenses are arranged side by side and spaced apart in the first state, thereby reducing the thickness of the lens module in the first state in the direction of the optical axis, and making the lens module thinner.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical imaging technology, and particularly relates to a lens module and electronic equipment. BACKGROUND

[0002] At present, users have higher and higher requirements for the shooting function of electronic equipment, and lens modules gradually develop in the direction of multiple lenses. Currently, there are cameras with 7 lenses or even 8 lenses. With the increasing number of lenses, the thickness of the lens module will inevitably increase, which is not conducive to the thinness of the lens module and the electronic equipment. SUMMARY

[0003] The purpose of the present application is to provide a lens module that can be thinner.

[0004] To achieve the purpose of the present application, the present application provides the following technical solutions:

[0005] A lens module comprises: a first lens having a first optical axis; a second lens having a second optical axis parallel to the first optical axis; a first driving mechanism connected with the first lens; and a second driving mechanism connected with the second lens; wherein the lens module switches between a first state and a second state; in the first state, the first lens and the second lens are arranged side by side with a spacing, and the thickness of the lens module is a first thickness; in the process of switching from the first state to the second state, the first driving mechanism drives the first lens to move along the first optical axis, and the second driving mechanism drives the second lens to move towards the first optical axis; in the second state, the first optical axis coincides with the second optical axis, light enters the second lens from the first lens, and the thickness of the lens module is a second thickness, which is greater than the first thickness.

[0006] By dividing the lens module with multiple lenses into two lenses and realizing the switching between the first state and the second state through the extension and movement of the two lenses, in the first state, the two lenses are arranged side by side with a spacing, and the thickness of the lens module is a first thickness; in the second state, the two lenses are arranged in layers and the optical axes coincide, at this time the thickness of the lens module is a second thickness, and the first thickness is less than the second thickness. In this way, the lens module can be flexibly switched between the first state and the second state, and the lens module can be thinner in the first state, and can be switched to the second state when needed. In this way, the overall electronic equipment can be thinned, and only the lens module slightly protrudes from the surface of the electronic equipment when switched to the second state, meeting the user's demand for thinness of the electronic equipment.

[0007] Further, the first driving mechanism comprises a first driving member, a first transmission member and a first support, the first support is fixedly connected with the first lens, the first driving member is connected with the first support through the first transmission member, the first driving member drives the first transmission member to move, and drives the first support to move along the first optical axis; the second driving mechanism comprises a second driving member, a second transmission member and a second support, the second support is fixedly connected with the second lens, the second driving member is connected with the second support through the second transmission member, the second driving member drives the second transmission member to move, and drives the second support to move towards the first optical axis.

[0008] The first driving member of the first driving mechanism drives the first transmission member to move, drives the first support to move along the first optical axis, and the second driving member is connected with the second support through the second transmission member, the second driving member drives the second transmission member to move, and drives the second support to move towards the first optical axis. In this way, the first driving mechanism and the second driving mechanism both have independent power systems and transmission structures, and the movement of the first lens and the second lens can be controlled independently, without interfering with each other, and the structure is relatively simple.

[0009] Further, the first driving mechanism further comprises a transition member, the transition member comprises a first inclined surface, the first support comprises a second inclined surface corresponding to the first inclined surface, the first driving member drives the transition member and the first support to move relative to each other, and the relative sliding of the first inclined surface and the second inclined surface drives the first support to move along the first optical axis.

[0010] Through the cooperation of the inclined surface structure between the transition member and the support, the length of the first driving mechanism in the optical axis direction can be further reduced, which is further beneficial to the thinning of the lens module.

[0011] Further, the first driving mechanism further comprises a first guide member, the first support is slidably connected with the first guide member, and under the guidance of the first guide member, the first support moves in the first optical axis direction; and / or the second driving mechanism further comprises a second guide member, the second support is slidably connected with the second guide member, and under the guidance of the second guide member, the second support moves towards the first optical axis.

[0012] The first guide member and the first transmission member jointly act on the first lens to prevent the first lens from rotating or sliding perpendicular to the optical axis direction when moving along the optical axis, and better control the moving direction of the first lens; similarly, through the joint action of the second guide member and the second transmission member, the direction of the second lens when moving towards the first optical axis can be well limited.

[0013] Further, the first driving member comprises an ultrasonic linear actuator, and the first transmission member comprises a carbon rod; and / or the second driving member comprises a motor, and the second transmission member comprises a worm-rack transmission structure or a screw-nut transmission structure.

[0014] The ultrasonic linear actuator can well control the linear moving direction without deviation, and the friction between the carbon rod and the support can well drive the first support to move linearly along the first optical axis in the reverse direction; through the cooperation of the worm and the rack or the cooperation of the screw and the nut, the second lens can also be well moved towards the first optical axis and the moving direction thereof can be controlled.

[0015] Further, the worm in the worm-rack transmission structure or the screw in the screw-nut transmission structure is divided into a first part and a second part along the axial direction, the first part is close to the first lens, the second part is away from the first lens relative to the first part, and the axial tooth thickness of the first part is smaller than that of the second part; and / or the second guide member is divided into a third part and a fourth part along the axial direction, the third part is close to the first lens, the fourth part is away from the first lens relative to the third part, and the diameter of the third part is smaller than that of the fourth part.

[0016] By setting the axial tooth thickness of the worm or the screw and the diameter of the second guide member to be smaller in the part region close to the first lens than in the part region far from the first lens, the freedom degree of the second lens in the process of moving towards the first optical axis is increased, thereby facilitating the secondary alignment of the second lens with the first lens and improving the alignment accuracy of the lens module. Since the direct guiding action of the worm and the second guide member will cause a large alignment tolerance of the second lens during the moving process, the alignment accuracy can be improved by increasing the freedom degree of movement during the moving process and then performing secondary alignment after the second lens moves to the specified position.

[0017] Further, the lens module further comprises a positioning block, which is arranged at a position corresponding to the first lens to position the second lens.

[0018] By adding the positioning block, the secondary positioning of the movement of the second lens is realized, and the alignment accuracy of the first lens and the second lens is improved.

[0019] Further, the lens module further comprises a first matching structure and a second matching structure, one of which is arranged on the second support and the other of which is arranged on the positioning block, and the first matching structure and the second matching structure match with each other to realize the positioning of the second lens.

[0020] By setting the first matching structure and the second matching structure on the second support and the positioning block, the first lens and the second lens are better positioned by the cooperation between the first matching structure and the second matching structure during secondary positioning.

[0021] Further, the first matching structure comprises a first magnetic member and a plurality of balls, and the second matching structure comprises a second magnetic member and a positioning groove; the first magnetic member and the second magnetic member attract each other, so that the balls are embedded in the positioning groove to realize positioning of the second lens.

[0022] The secondary positioning of the support and the positioning block is powered by the mutual attraction between the first magnetic member and the second magnetic member, and the positioning of the second lens is completed by the mutual action of the balls and the positioning groove, i.e., the balls are embedded in the positioning groove.

[0023] The application also provides an electronic device comprising a body and the lens module described above, and the lens module is installed on the body. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0025] Figure 1 is a structural schematic diagram of a lens module in a first state of an embodiment;

[0026] Figure 2 is a structural schematic diagram of a lens module in a second state of an embodiment;

[0027] Figure 3 is a simplified schematic diagram of two lens sections of a lens module in a first state of an embodiment;

[0028] Figure 4 is a simplified schematic diagram of two lens sections of a lens module in a second state of an embodiment

[0029] Figure 5 is a structural schematic diagram of a lens module of another embodiment;

[0030] Figure 6 is Figure 5 a simplified schematic diagram of a first inclined surface and a second inclined surface in

[0031] Figure 7 is Figure 6a simplified schematic diagram of the force acting in the lens module;

[0032] Figure 8 a structural schematic diagram of one angle of the lens module of an embodiment;

[0033] Figure 9 a structural schematic diagram of another angle of the lens module of an embodiment;

[0034] Figure 10 a front structural schematic diagram of the positioning block of an embodiment;

[0035] Figure 11 a three-dimensional structural schematic diagram of the positioning block of an embodiment;

[0036] Figure 12 a three-dimensional structural schematic diagram of the second support and the second lens of an embodiment;

[0037] Figure 13 a schematic diagram of an electronic device of an embodiment. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0039] In the present application, the terms “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inner”, “outer”, “middle”, “vertical”, “horizontal”, “lateral”, “longitudinal” and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0040] Moreover, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term “upper” can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific circumstances.

[0041] In addition, the terms "mounting", "arrangement", "provided with", "connected", "linked" should be interpreted broadly. For example, it can be a fixed connection, detachable connection, or integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.

[0042] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0043] The technical solutions of the present application will be further described below in conjunction with specific embodiments and drawings.

[0044] Please refer to Figure 1 With Figure 2 , the present application provides a lens module 100, comprising: a first lens 20 having a first optical axis S1; a second lens 40 having a second optical axis S2 parallel to the first optical axis S1; a first driving mechanism 60 connected with the first lens 20; and a second driving mechanism 80 connected with the second lens 40.

[0045] The lens module 100 switches between a first state (as shown in Figure 1 ) and a second state (as shown in Figure 2 ).

[0046] In the first state, the first lens 20 and the second lens 40 are arranged side by side and spaced apart, i.e. the first optical axis S1 of the first lens 20 does not coincide with the second optical axis S2 of the second lens 40, and the first lens 20 and the second lens 40 are in the same horizontal plane, and the thickness of the lens module 100 is a first thickness H1 (as shown in Figure 3 ).

[0047] In the process of switching from the first state to the second state, the first driving mechanism 60 drives the first lens 20 to move along the first optical axis S1, and the second driving mechanism 80 drives the second lens 40 to move towards the first optical axis S1.

[0048] In the second state, the first optical axis S1 coincides with the second optical axis S2, and the light rays enter the second lens 40 from the first lens 20, and the thickness of the lens module 100 is a second thickness H2 (as shown in Figure 4 ), and the second thickness H2 is greater than the first thickness H1.

[0049] It can be understood that the first lens 20 and the second lens 40 each have at least one lens. The more lenses of the first lens 20 or the second lens 40, the more lenses of the lens module 100, so that the lens module 100 can obtain clearer and higher quality images.

[0050] By dividing the multi-lens lens module 100 into two lenses, i.e., the first lens 20 and the second lens 40, and by the extension and movement of the two lenses to realize the switching between the first state and the second state. In the first state, the first lens 20 and the second lens 40 are arranged side by side and spaced apart, and the thickness of the lens module 100 is the first thickness H1; in the second state, the first lens 20 and the second lens 40 are arranged in layers and the first optical axis S1 and the second optical axis S2 coincide, at this time the thickness of the lens module 100 is the second thickness H2, the first thickness H1 is less than the second thickness H2. In this way, the lens module 100 can be flexibly switched between the first state and the second state, and the lens module 100 can be thinner in the first state, and can be switched to the second state when needed. In this way, the overall electronic device can be thinned, and only the lens module 100 slightly protrudes from the surface of the electronic device when switched to the second state, meeting the user's demand for thin electronic devices.

[0051] In some embodiments, the 7-lens lens module 100 can be divided into a 3-lens first lens 20 and a 4-lens second lens 40; in some other embodiments, the 7-lens lens module 100 can also be divided into a 2-lens first lens 20 and a 5-lens second lens 40; in another embodiment, the 6-lens lens module 100 can also be divided into a 3-lens first lens 20 and a 3-lens second lens 40. In the actual design process, the multi-lens lens module 100 can be divided into a first lens 20 and a second lens 40 with fewer lenses according to specific needs, and then the first lens 20 and the second lens 40 are combined to form the lens module 100 by extension and movement. The above are only exemplary embodiments of several feasible embodiments, and should not be considered as limiting the first lens 20 and the second lens 40 of the present application to the above combinations.

[0052] In some embodiments, the first driving mechanism 60 includes a first driving member 62, a first transmission member 64, and a first support 66, the first support 66 is fixedly connected with the first lens 20, the first driving member 62 is connected with the first support 66 through the first transmission member 64, the first driving member 62 drives the first transmission member 64 to move, and drives the first support 66 to move along the first optical axis S1.

[0053] The second driving mechanism 80 comprises a second driving member 82, a second transmission member 84 and a second support 86 fixedly connected with the second lens 40, the second driving member 82 is connected with the second support 86 through the second transmission member 84, the second driving member 82 drives the second transmission member 84 to move, and drives the second support 86 to move towards the first optical axis S1.

[0054] The first driving member 62 of the first driving mechanism 60 drives the first transmission member 64 to move, drives the first support 66 to move along the first optical axis S1, and the second driving member 82 of the second driving mechanism 80 is connected with the second support 86 through the second transmission member 84, the second driving member 82 drives the second transmission member 84 to move, and drives the second support 86 to move towards the first optical axis S1. In this way, the first driving mechanism 60 and the second driving mechanism 80 both have independent power systems and transmission structures, and can independently control the movement of the first lens 20 and the second lens 40 respectively, without interfering with each other, and the structure is relatively simple.

[0055] Please refer to Figure 5 In some other embodiments, the first driving mechanism 60 further comprises a transition member 68, the transition member 68 comprises a first inclined surface 682, the first support 66 comprises a second inclined surface 662 corresponding to the first inclined surface 682, the first driving member 62 drives the transition member 68 and the first support 66 to move relative to each other, and the relative sliding of the first inclined surface 682 and the second inclined surface 662 drives the first support 66 to move along the first optical axis S1.

[0056] It can be understood that the corresponding second inclined surface 662 of the first inclined surface 682 means that the angle of the first inclined surface 682 and the angle of the second inclined surface 662 are 90°, so that the movement distance of the first inclined surface 682 (i.e. the transition member 68) moving transversely can be converted into the movement distance of the second inclined surface 662 (i.e. the second support 66) along the first optical axis S1.

[0057] Since the length of the first transmission member 64 is changed from the vertical direction (i.e. the direction of the first optical axis S1) to the horizontal direction (i.e. perpendicular to the first optical axis S1), through the cooperation between the first inclined surface 682 of the transition member 68 and the second inclined surface 662 of the support 66, the length of the first driving mechanism 60 in the direction of the first optical axis S1 can be further reduced, which is further beneficial to the thinning of the lens module 100.

[0058] Please refer to Figure 5 and Figure 6, the slope angle of the first slope 682 is a, and the slope angle of the second slope 662 is β, and it can be known from the above that a and β should satisfy the relationship: a + β = 90°. In this way, the lateral movement (i.e., the movement direction is perpendicular to the first optical axis S1) of the transition piece 68 can be converted into the movement of the second slope 662 (i.e., the bracket 66) along the first optical axis S1 through the sliding between the first slope 682 and the second slope 662.

[0059] Please refer to Figure 7 , assuming that the force provided by the first driving piece 62 is F, and without considering the influence of some other factors such as friction, the component force F1 of the force F acting on the second slope 662 through the first slope 682 is Fsin a, and the component force F2 of the second slope 662 that can provide to drive the first bracket 66 along the first optical axis S1 is F1sin β = Fsin a sin β. And since a + β = 90° (0° < a, β < 90°), it can be further obtained that F2 = Fsin a cos a = 1 / 2 Fsin 2a (0° < a, β < 90°).

[0060] From F2 = 1 / 2 Fsin 2a combined with the image properties of the sine function, it can be seen that in order to make the value of F2 larger, under the condition that F is certain, the value of a should not be too large or too small, and a can further satisfy the relationship: 30° ≤ a ≤ 60°. Similarly, β can also further satisfy the relationship: 30° ≤ β ≤ 60°. Because the movement direction of the first driving piece 62 driving the first transmission piece 64 is along the direction perpendicular to the first optical axis S1, it is easy to cause the sliding between the first slope 682 and the second slope 662 to require more power. In order to achieve a larger power F2 with a smaller power F, improve the conversion efficiency, the value range of a and β should satisfy the above relationship.

[0061] Please continue to refer to Figure 1 In some embodiments, the first driving mechanism 60 can further include a first guide piece 65, the first guide piece 65 is arranged in parallel and spaced apart with the first driving piece 64, the first bracket 66 is in sliding connection with the first guide piece 65, and under the guiding action of the first guide piece 65, the first bracket 66 moves along the direction of the first optical axis S1.

[0062] The second driving mechanism 80 can further include a second guide piece 85, the second guide piece 85 is arranged in parallel and spaced apart with the second transmission piece 84, the second bracket 86 is in sliding connection with the second guide piece 85, and under the guiding action of the second guide piece 85, the second bracket 86 moves towards the first optical axis S1.

[0063] The first guide member 65 and the first transmission member 64 jointly act to make the first lens 20 not produce rotation or sliding in a direction perpendicular to the first optical axis S1 when moving along the first optical axis S1, and better control the moving direction of the first lens 20; similarly, through the joint action of the second guide member 85 and the second transmission member 84, the direction of the second lens 40 when moving towards the first optical axis S1 can be well limited, so that the alignment of the second lens 40 and the first lens 20 is more accurate, and the alignment accuracy of the lens module 100 is improved.

[0064] In some embodiments, the first driving member 62 can be an ultrasonic linear actuator, and the first transmission member 64 can be a carbon rod.

[0065] In the present embodiment, the ultrasonic linear actuator can include a piezoelectric sheet, the piezoelectric sheet is in direct contact with one end of the carbon rod, and the first support 66 is in sliding connection with the outer peripheral wall of the carbon rod. The working principle is as follows: initially, the piezoelectric sheet is in a flat state, directly in contact with the carbon rod, and the carbon rod and the first support 66 are relatively static due to the frictional resistance on the surface of the carbon rod; the external circuit supplies power to the piezoelectric sheet, and controls the input voltage to make the piezoelectric sheet deform slowly under the action of the electric field force, and the deformed part in contact with the carbon rod protrudes, thereby extruding the carbon rod to move, and the carbon rod drives the first support 66 to move due to the frictional resistance on the surface; when the piezoelectric sheet deforms to the maximum deformation threshold, the control input voltage is controlled to make the piezoelectric sheet quickly return to the flat state, and the carbon rod quickly slides downward, while the first support 66 stays at the original height due to inertia; then the control input voltage is controlled to make the piezoelectric sheet slowly deform... Such a cycle continues until the first support 66 moves to the predetermined position.

[0066] By providing power through the ultrasonic linear actuator and combining the good surface friction characteristics of the carbon rod itself, the linear movement of the first support 66 can be well controlled without deviation.

[0067] In other embodiments, the first driving member 62 can also be a motor, and the first transmission member 64 can also be a screw nut, which can be fixedly connected with the first support 66. The motor drives the screw to rotate, and drives the screw nut to move linearly along the length direction of the screw, so that the first lens 20 moves along the direction of the first optical axis S1.

[0068] It can be understood that in some other embodiments, the first driving member 62 and the first transmission member 64 of the first driving mechanism 60 can also be other combinations, and the present application does not limit the specific structure of the first driving mechanism 60.

[0069] Please continue to refer to Figure 1In some embodiments, the second driving member 82 comprises a motor, and the second transmission member 84 can comprise a worm 842 and a rack 844, the worm 842 being arranged in parallel with the second guide member 85 along the moving direction of the second support 86, and the rack 844 being fixedly connected with the second support 86, the worm 842 being engaged with the rack 844, so that the worm 842 is driven to rotate by the motor, and the rack 844 is driven to move along the length direction of the worm 842 by the engagement of the worm 842 and the rack 844, thereby driving the second support 86 to move towards the first optical axis S1. It can be understood that the moving direction of the second support 86 refers to the direction of the second support 86 towards the first optical axis S1.

[0070] It can be understood that in some other embodiments, the second transmission member 84 of the second driving mechanism 80 can also be other feasible structures, such as a screw-nut transmission structure, and the present application does not limit the specific structure of the second driving mechanism 80. In addition, since the second transmission member 84 is a screw-nut transmission structure, its principle is basically the same as that of the worm-rack transmission structure, so the present application only specifically describes the embodiment in which the second transmission member 84 is a worm-rack transmission structure.

[0071] Please refer to Figure 8 and Figure 9 In some embodiments, the worm 842 in the worm-rack transmission structure is divided into a first part 8421 and a second part 8422 along the axial direction, the first part 8421 is close to the first lens 20, and the second part 8422 is away from the first lens 20 relative to the first part 8421, the axial tooth thickness D1 of the first part 8421 is smaller than the axial tooth thickness D2 of the second part 8422.

[0072] It can be understood that the axial tooth thickness of the helical teeth of the first part 8421 and the second part 8422 can be gradually changed (i.e., the axial tooth thickness of the first part 8421 gradually decreases from one end close to the second part 8422 to the other end, and the axial tooth thickness of the second part 8422 gradually increases from one end close to the first part 8421 to the other end), or can be equal (i.e., the axial tooth thickness of the helical teeth of the first part 8421 is equal everywhere, and the axial tooth thickness of the helical teeth of the second part 8422 is equal everywhere), as long as the axial tooth thickness of the first part 8421 is smaller than the axial tooth thickness of the second part 8422, and the present application does not limit the specific structure.

[0073] In some embodiments, the second guide member 85 is divided into a third part 853 and a fourth part 854 along the axial direction, the third part 853 is close to the first lens 20, and the fourth part 854 is away from the first lens 20 relative to the third part 853, the diameter R3 of the third part 853 is smaller than the diameter R4 of the fourth part 854.

[0074] It can be understood that the diameters of the third part 853 and the fourth part 854 can be gradually changed (i.e. the diameter of the third part 853 gradually decreases from one end close to the fourth part 854 to the other end, and the diameter of the fourth part 854 gradually increases from one end close to the third part 853 to the other end), or can be equal (i.e. the diameter of the third part 853 is equal everywhere, and the diameter of the fourth part 854 is equal everywhere), as long as the diameter of the third part 853 is smaller than the diameter of the fourth part 854, and the present application does not make specific limitations thereto.

[0075] By making the axial tooth thickness of the worm 842 or the diameter of the second guide 85 smaller at one end close to the first lens 20 than at the other end away from the first lens 20, the freedom of movement of the second lens 40 during movement towards the first optical axis S1 is increased, and then a secondary alignment is performed when the second lens 40 is moved directly below the first lens 20, thereby achieving the positioning of the second lens 40 to make the second optical axis S2 coincide with the first optical axis S1. Since the direct guidance of the worm 842 and the second guide 85 will cause a large alignment tolerance of the second lens 40 during movement, which is not conducive to the assembly of the high-precision first lens 20 and the second lens 40, the alignment accuracy can be improved by increasing the freedom of movement during movement and performing secondary alignment after the second lens 40 is moved to the specified position.

[0076] Please also refer to Figure 1 、 Figure 2 In some embodiments, the lens module 100 can further include a positioning block 70, which is arranged at a position corresponding to the first lens 20, i.e. the positioning block 70 can make the second lens 40 correspond to the first lens 20 (i.e. the second optical axis S2 coincides with the first optical axis S1) during movement towards the first optical axis S1. It can be understood that the positioning block 70 arranged at a position corresponding to the first lens 20 means that the positioning block 70 is arranged on one side of the first lens 20, and when the second lens 40 is moved to a position in contact with the positioning block 70, the second lens 40 is just aligned with the first lens 20 under the block of the positioning block 70, i.e. the second optical axis S2 coincides with the first optical axis S1.

[0077] By increasing the positioning block 70, the secondary alignment of the movement of the second lens 40 is realized, the alignment accuracy of the first lens 20 and the second lens 40 is improved, and the cumulative tolerance caused by the transmission of the second transmission member 84 during the movement of the second lens 40 is reduced.

[0078] Please refer to Figure 10 to Figure 12In some embodiments, the second bracket 86 may include a first mating structure 862, and the positioning block 70 may include a second mating structure 72. The positioning of the second lens 40 can be achieved by the cooperation of the first mating structure 862 and the second mating structure 72, so that the second optical axis S2 coincides with the first optical axis S1.

[0079] In some embodiments, the first mating structure 862 may include a first magnetic element 8622 and a plurality of balls 8624, and the second mating structure 72 may include a second magnetic element 722 and a positioning groove 724. The first magnetic element 8622 and the second magnetic element 722 are correspondingly arranged, that is, when the second bracket 86 moves to the position of the positioning block 70, the first magnetic element 8622 and the second magnetic element 722 are coaxial. When the second bracket 86 moves to the position of the positioning block 70, the mutual attraction between the first magnetic element 8622 and the second magnetic element 722 causes the second bracket 86 to adhere tightly to the positioning block 70. At the same time, due to the action of the balls 8624 and the positioning groove 724, the balls 8624 will roll into the positioning groove 724, thereby achieving precise alignment.

[0080] In practical implementation, a groove (not shown in the figure) can be formed at corresponding positions on the corresponding surfaces of the second bracket 86 and the positioning block 70, respectively. Then, the first magnetic element 8622 is placed in the groove of the second bracket 86, and the second magnetic element 722 is placed in the groove of the positioning block 70. In this way, the structure of the lens module 100 can be made more compact, which is beneficial to its miniaturization.

[0081] In some embodiments, the positioning groove 724 can be arranged in an "X" shape, with the second magnetic element 722 disposed at its center. Correspondingly, there can be four balls 8624, each corresponding to one of the four corners of the positioning groove 724. In other embodiments, the cross-sectional shape of the positioning groove 724 can be "V" shaped or trapezoidal, etc. This allows for better and more precise positioning of the second lens 40, ensuring that the second optical axis S1 coincides with the second optical axis S2. Of course, the positioning groove 724 and the balls 8624 can also be configured in other feasible ways, and this invention does not limit this.

[0082] It is understood that the first magnetic component 8622 and the second magnetic component 722 can be components with magnetic properties such as magnets, and there is no limitation on their specific types. Furthermore, the present invention does not impose any specific limitations on their specific shapes, which can be set into circles, rectangles, triangles, polygons, etc., according to actual needs.

[0083] Therefore, by the secondary alignment between the first matching structure 862 and the second matching structure 72, the influence of the large tolerance generated by the worm 842 and the second guide 85 during the guiding and driving of the second support 86 to move towards the first optical axis S1 can be effectively avoided. Only the matching tolerance of the first matching structure 862 and the second matching structure 72 needs to be considered, and obviously, the matching tolerance of the first matching structure 862 and the second matching structure 72 is small and easier to control, so that the lens module 100 with higher precision can be obtained.

[0084] It can be understood that in some other embodiments, the first matching structure 862 and the second matching structure 72 can also be other structures capable of playing the same role. The present application only provides a preferred embodiment, but should not be understood as only being implemented by this embodiment. The present application does not limit the specific structure of the first matching structure 862 and the second matching structure 72.

[0085] In some other embodiments, the first matching structure 862 can also be arranged on the positioning block 70, and the second matching structure 72 is arranged on the second support 86. That is, the first matching structure 862 and the second matching structure 72 can be arranged on one of the positioning block 70 and the second support 86, and are not limited to the implementation manner listed in the above embodiment.

[0086] Please refer to Figure 13 The present application also provides an electronic device 1000, which comprises a body 500 and the lens module 100 according to any one of the above embodiments. The lens module 100 is installed in the body 500. The obtained electronic device 1000 can be more thin, and when it is necessary to take photos or record videos, the lens module 100 will protrude from the surface of the electronic device 1000, and when it is not working (i.e. the lens module 100 is not needed), the lens module 100 will be retracted into the body 500, thereby reducing the thickness of the electronic device 1000 and making the electronic device 1000 more thin.

[0087] The electronic device 1000 can be a mobile phone, a tablet computer or a smart wearable device, and the present application does not limit the specific type of the electronic device 1000.

[0088] The above disclosure is only a preferred embodiment of the present application, and of course cannot limit the scope of the rights of the present application. Those skilled in the art can understand that the entire or partial processes of the above embodiments can be implemented, and equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A lens module, characterized in that, Applied to electronic devices, including: A first lens has a first optical axis, the direction of which is the thickness direction of the electronic device; The second lens has a second optical axis parallel to the first optical axis; A first driving mechanism, the first driving mechanism being connected to the first lens; and A second drive mechanism is connected to the second lens; The lens module switches between a first state and a second state. In the first state, the first lens and the second lens are arranged side by side with a gap, and the thickness of the lens module is a first thickness; During the process of switching from the first state to the second state, the first driving mechanism drives the first lens to move along the first optical axis, and the second driving mechanism drives the second lens to move toward the first optical axis. In the second state, the first optical axis and the second optical axis coincide, and light enters the second lens from the first lens. The thickness of the lens module is the second thickness, which is greater than the first thickness. The first driving mechanism includes a first driving component, a first transmission component, and a first bracket. The first bracket is fixedly connected to the first lens. The first driving component is connected to the first bracket through the first transmission component. The first driving component drives the first transmission component to move, thereby causing the first bracket to move along the first optical axis. The first driving mechanism further includes a transition member, the transition member includes a first inclined surface, the first bracket includes a second inclined surface corresponding to the first inclined surface, the first driving member drives the transition member and the first bracket to move relative to each other, and the first inclined surface and the second inclined surface slide relative to each other to move the first bracket along the first optical axis direction; The extension direction of the first transmission member is perpendicular to the direction of the first optical axis, and the movement direction of the transition member is perpendicular to the direction of the first optical axis. The slope angle of the first inclined plane is α, and the slope angle of the second inclined plane is β, satisfying the following relationships: α + β = 90°, 30° ≤ α ≤ 60°, 30° ≤ β ≤ 60°.

2. The lens module as described in claim 1, characterized in that, The second driving mechanism includes a second driving component, a second transmission component, and a second bracket. The second bracket is fixedly connected to the second lens. The second driving component is connected to the second bracket through the second transmission component. The second driving component drives the second transmission component to move, thereby causing the second bracket to move toward the first optical axis.

3. The lens module as described in claim 2, characterized in that, The first driving mechanism further includes a first guide member, and the first bracket is slidably connected to the first guide member. Under the guidance of the first guide member, the first bracket moves in the direction of the first optical axis. And / or, The second drive mechanism further includes a second guide member, and the second bracket is slidably connected to the second guide member. Under the guidance of the second guide member, the second bracket moves toward the first optical axis.

4. The lens module as described in claim 3, characterized in that, The first driving element includes an ultrasonic linear actuator, and the first transmission element includes a carbon rod; and / or, The second driving component includes a motor, and the second transmission component includes a worm gear and rack transmission structure or a lead screw and nut transmission structure.

5. The lens module as described in claim 4, characterized in that, The worm in the worm gear and rack transmission structure or the lead screw in the lead screw and nut transmission structure is divided into a first part and a second part along the axial direction. The first part is close to the first lens, and the second part is far away from the first lens relative to the first part. The axial tooth thickness of the first part is smaller than the axial tooth thickness of the second part. And / or, The second guide is divided into a third part and a fourth part along the axial direction. The third part is close to the first lens, and the fourth part is far away from the first lens relative to the third part. The diameter of the third part is smaller than the diameter of the fourth part.

6. The lens module as described in claim 2, characterized in that, The lens module also includes a positioning block, which is positioned at a location corresponding to the first lens and is used to position the second lens.

7. The lens module as described in claim 6, characterized in that, The lens module further includes a first mating structure and a second mating structure, one of which is disposed on the second bracket and the other is disposed on the positioning block. The first mating structure and the second mating structure cooperate with each other to achieve the positioning of the second lens.

8. The lens module as described in claim 7, characterized in that, The first mating structure includes a first magnetic element and a plurality of balls, and the second mating structure includes a second magnetic element and a positioning groove. The first magnetic element and the second magnetic element attract each other so that the balls are embedded in the positioning groove to achieve the positioning of the second lens.

9. An electronic device, characterized in that, The electronic device includes a body and a lens module as described in any one of claims 1-8, wherein the lens module is mounted on the body.

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