Lens module and electronic device

Abstract

The utility model discloses a lens module and electronic equipment, arrange and constitute a plurality of coil groups along the same direction to multiple coils, and multiple coil groups and the magnetic part of multiple movable lenses correspond respectively, to make every movable lens can be driven independently by the drive part. Thus, in the cross section direction of the coil axial direction, the form of multiple coils of the same coil group is configured to be the same. It is helpful to the mutual superposition of the induced magnetic field generated by multiple coils of each coil group, to accurately drive the movable lens. At the same time, the coil form of the adjacent two coil groups is configured to be different, which helps to adjust the form of the magnetic part accordingly according to the form of the coil. Thus, the induced magnetic field generated by the coil group avoids interfering with the magnetic part corresponding to the adjacent coil group. The movement stroke of the movable lens is increased.

Description

Technical Field

[0001] This utility model relates to the field of camera technology, and in particular to a lens module and an electronic device. Background Technology

[0002] The focus adjustment of camera lens assemblies is typically achieved using a coil and magnet combination. This method limits the lens's movement. Furthermore, when driving multiple lenses, the induced magnetic fields of the coils can easily interfere with each other, making it difficult to guarantee control precision. Therefore, how to drive multiple lenses becomes a problem that needs to be solved. Utility Model Content

[0003] In view of this, one embodiment of the present invention provides a lens module and an electronic device, which uses multiple sets of coil groups to drive multiple movable lenses respectively, and the coil shapes of adjacent coil groups are configured differently so that the driving unit can independently drive multiple movable lenses.

[0004] According to a first aspect of the present invention, a lens module is provided, the lens module comprising:

[0005] Imaging section;

[0006] Guiding department;

[0007] Filters;

[0008] Multiple movable lenses are movably disposed on the guide portion, each movable lens comprising a lens group, and a filter disposed on the side of the lens group away from the fixed lens; and

[0009] The driving unit includes a plurality of coils arranged in the same direction and a plurality of magnetic parts corresponding to a plurality of movable lenses. The magnetic parts are disposed on the corresponding movable lenses, and the plurality of coils form a plurality of coil groups corresponding to a plurality of movable lenses.

[0010] In the axial cross-sectional direction of the coil, multiple coils in the same coil group have the same shape, while coils in two adjacent coil groups have different shapes. The coil group generates an induced magnetic field acting on the corresponding magnetic part to drive the movable lens to move closer to or away from the imaging part along the optical path.

[0011] Furthermore, the coil has an inner ring surface and an outer ring surface that are opposite to each other;

[0012] In the arrangement direction of the plurality of coils, the width of the coils in two adjacent coil groups and the thickness between the inner and outer annular surfaces are different.

[0013] Furthermore, the plurality of coil groups includes a first coil group and a second coil group;

[0014] The plurality of movable lenses include a first lens and a second lens, wherein the magnetic part of the first lens includes a first magnetic body, and the magnetic part of the second lens includes a second magnetic body;

[0015] In the arrangement direction of the plurality of coils, the width of the first magnetic body is adapted to the width of the coil of the first coil group, and the width of the second magnetic body is adapted to the width of the coil of the second coil group.

[0016] Furthermore, the first lens is located between the second lens and the fixed lens;

[0017] The number of coils in the second coil group is greater than the number of coils in the first coil group, and in the arrangement direction of the plurality of coils, the width and thickness of the coils in the second coil group are smaller than those in the first coil group.

[0018] Furthermore, both the first coil group and the second coil group include a first coil, a second coil, and a third coil, with the second coil located between the first coil and the third coil, forming a driving unit together with the first coil and the third coil;

[0019] The width of the first magnetic body is the same as the width of the coil in the first coil group, and the width of the second magnetic body is the same as the width of the coil in the second coil group;

[0020] The number of the first magnetic body and the number of the second magnetic body are both two. The two first magnetic bodies are arranged side by side with their magnetic poles facing opposite directions, and the two second magnetic bodies are arranged side by side with their magnetic poles facing opposite directions.

[0021] Furthermore, the drive unit also includes:

[0022] A control circuit, electrically connected to the drive unit and configured to feed a first electrical signal to the first coil, a second electrical signal to the second coil, and a third electrical signal to the third coil, wherein the first, second, and third electrical signals are all sinusoidal signals, and the phase difference between the second and first electrical signals is 120 degrees, and the phase difference between the second and third electrical signals is -120 degrees.

[0023] Furthermore, the second coil group includes two driving units, with the first and third coils of the two driving units arranged adjacent to each other.

[0024] Furthermore, the coil group includes a first coil, a third coil, and at least one second coil located between the first coil and the third coil;

[0025] The drive unit also includes:

[0026] A control circuit is electrically connected to the coil group and configured such that the magnetic field direction of the second coil is opposite to that of an adjacent coil to form a first drive pair, and the magnetic field direction of the second coil is opposite to that of another adjacent coil to form a second drive pair; at the same time, the magnetic field direction of the same second coil is opposite in the corresponding first drive pair and second drive pair.

[0027] Furthermore, the lens module also includes:

[0028] The base includes a fixing frame, which includes two uprights;

[0029] The guide portion includes a first guide rod, which is fixedly connected to the two columns.

[0030] The movable lens includes a support portion and a lens barrel disposed on the support portion, the support portion having a first sliding groove facing the first guide rod;

[0031] The drive unit includes a magnetic guide plate, which is disposed on the side of the first guide rod away from the movable lens;

[0032] The coil assembly drives the movable lens to move, the magnetic force of the plurality of magnetic parts acts on the magnetic guide plate, and the first slide groove slides along the first guide rod.

[0033] Furthermore, the base also includes a base plate on which two columns are erected;

[0034] The first groove is a V-shaped groove, which has two mutually perpendicular first contact planes. The two first contact planes extend along the axial direction of the first guide rod and abut against the first guide rod.

[0035] The movable lens also includes a ball bearing, and the lens barrel is located between the ball bearing and the first guide rod;

[0036] The bearing portion has a limiting groove facing the base plate, and the ball is disposed in the limiting groove and rolls along the base plate.

[0037] Secondly, this utility model embodiment also provides an electronic device, the electronic device comprising:

[0038] The lens module described in the first aspect above.

[0039] One embodiment of the lens module and electronic device of this utility model arranges multiple coils along the same direction to form multiple coil groups. Each coil group corresponds to a magnetic part of a movable lens, allowing each movable lens to be driven independently by a drive unit. Thus, in the axial cross-sectional direction of the coils, the multiple coils within the same coil group are configured with identical shapes. This facilitates the superposition of the induced magnetic fields generated by the multiple coils in each coil group, accurately driving the movable lens. Simultaneously, configuring the coil shapes of adjacent coil groups differently allows for corresponding adjustments to the shape of the magnetic parts based on the coil shape. This prevents the induced magnetic field generated by the coil group from interfering with the magnetic parts corresponding to adjacent coil groups, thereby increasing the travel distance of the movable lens. Attached Figure Description

[0040] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0041] Figure 1 This is a schematic diagram of the lens module structure according to an embodiment of the present utility model;

[0042] Figure 2 This is an exploded view of one side of the lens module according to an embodiment of the present invention;

[0043] Figure 3 This is an exploded view of the other side of the lens module in this embodiment of the present invention;

[0044] Figure 4 This is an internal schematic diagram of one side of the lens module according to an embodiment of the present invention;

[0045] Figure 5 This is an internal schematic diagram of the lens module on the other side of this utility model embodiment;

[0046] Figure 6 This is an exploded view of one side of the movable lens in an embodiment of this utility model;

[0047] Figure 7 This is an exploded view of the other side of the movable lens in an embodiment of this utility model;

[0048] Figure 8 This is a schematic diagram showing the positional relationship between the movable lens and the coil provided in the first embodiment of this utility model;

[0049] Figure 9 This is a schematic diagram of the electrical signal waveform of the lens module according to an embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram showing the positional relationship between the movable lens and the coil provided in the second embodiment of this utility model;

[0051] Figure 11 yes Figure 1 Schematic diagram of the cross section at point AA;

[0052] Figure 12 yes Figure 11 A magnified view of a portion of the image.

[0053] Explanation of reference numerals in the attached figures:

[0054] 1-Drive unit;

[0055] 11-Magnetic part; 111-First magnetic body; 112-Second magnetic body;

[0056] 12 - Coil; 13 - Coil group; 131 - First coil group; 132 - Second coil group;

[0057] 14-Inner ring surface; 15-Outer ring surface; 16-Drive unit;

[0058] 17-Magnetic guide plate; 181-First drive pair; 182-Second drive pair;

[0059] 21-First coil; 22-Second coil; 23-Third coil; 3-Movable lens;

[0060] 31-Lens group;

[0061] 32-First Shot;

[0062] 33-Second shot;

[0063] 341-Bearing part; 3411-Limiting groove;

[0064] 342 - Lens tube;

[0065] 343 - First groove; 345 - First contact plane;

[0066] 35-ball bearing;

[0067] 4-Guide section;

[0068] 41-First guide rod; 41a-Central axis;

[0069] 6-Fixed lens;

[0070] 7-Seal;

[0071] 71-Fixed frame; 711-Column; 712-Beam;

[0072] 72-Base plate;

[0073] 8-Control circuit. Detailed Implementation

[0074] The present invention will now be described based on embodiments, but it is not limited to these embodiments. In the following detailed description of the present invention, certain specific details are described in detail. Those skilled in the art will fully understand the present invention even without these details. To avoid obscuring the essence of the present invention, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0075] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only, and the scale shown in the drawings is only one embodiment; other embodiments are not necessarily implemented to scale.

[0076] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0077] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0078] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0079] For ease of explanation, spatially related terms such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “below” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplified term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0080] Figure 1 This is a schematic diagram of the lens module in this embodiment. Figure 2 and Figure 3 This is an exploded view of the lens module in this embodiment.

[0081] In some implementations, such as Figures 1-3 As shown, the lens module in this embodiment can be configured as a periscope lens module or a cylindrical lens module. Taking a periscope lens module as an example, the periscope lens module includes a base 7 and a first driving part 1, a guide part 4, a fixed lens 6, and a plurality of movable lenses 3 disposed on the base 7. The upper shell of the base 7 is provided with a light inlet hole, and the side of the base 7 is provided with a light outlet hole. Light enters from the light inlet hole, passes through the fixed lens 6 and the movable lenses 3 in sequence, and then exits from the light outlet hole. The light inlet hole is used for the fixed lens 6 of the periscope lens module to receive incident light. The movable lenses 3 are disposed on the guide part 4 so that the guide part 4 drives the movable lenses 3 to move along the light path. A magnetic part 11 is disposed on the side of the movable lenses 3. The light path of the periscope lens module includes a first segment and a second segment. The first segment is where light enters from the light inlet hole into the fixed lens 6, and the second segment is where light refracted by the fixed lens 6 enters into the movable lenses 3. The guide part 4 extends along the direction of the second segment of the light path.

[0082] Figure 4 and Figure 5 This is an internal schematic diagram of the lens module in this embodiment. Figure 6 and Figure 7 This is an exploded view of the movable lens 3 in this embodiment.

[0083] Further reference Figures 4-7 As shown, the drive unit 1 includes a plurality of coils 12 arranged in the same direction and a plurality of magnetic parts 11 corresponding to a plurality of movable lenses 3. The magnetic parts 11 are disposed on the corresponding movable lenses 3, and the plurality of coils 12 form a plurality of coil groups 13 corresponding to the plurality of movable lenses 3. In the axial direction of the coils 12, the coils 12 and the magnetic parts 11 are spaced apart by a predetermined distance.

[0084] Figure 8 This is a schematic diagram showing the positional relationship between the movable lens 3 and the coil 12 in this embodiment.

[0085] Further reference Figure 4 and Figure 8 As shown, in the axial cross-sectional direction of coil 12, that is, in the direction in which coil 12 is projected onto magnetic part 11 (e.g.) Figure 4 As indicated by arrow B, multiple coils 12 in the same coil group 13 have the same shape, while coils 12 in two adjacent coil groups 13 have different shapes. The coil group 13 generates an induced magnetic field acting on the corresponding magnetic part 11 to drive the movable lens 3 to move closer to or away from the fixed lens 6 along the optical path. In this embodiment, each coil group 13 can independently drive the corresponding movable lens 3 to move linearly.

[0086] Specifically, coil 12 includes a wire, which includes a winding section and two connecting sections. The winding section is spirally wound to form a coil body, and the two connecting ends extend from the coil body to form leads. In this embodiment, the multiple coil bodies in each coil group 13 maintain a consistent shape. All coil bodies are located on the same side of the movable lens 3. The coil bodies of two adjacent coil groups 13 have different dimensions in the direction of arrangement of the multiple coil bodies. Furthermore, the shape of the magnetic part 11 provided in each movable lens 3 is adapted to the shape of the corresponding coil 12. As a result, each coil group 13 can drive the corresponding magnetic part 11 to move, and the spacing between multiple coil bodies in the same coil group 13 is smaller than the spacing between two adjacent coil bodies in two adjacent coil groups 13. This reduces the interference of coil group 13 on the magnetic parts 11 corresponding to adjacent coil groups 13.

[0087] In summary, the lens module in this embodiment arranges multiple coils 12 along the same direction to form multiple coil groups 13. Each coil group 13 corresponds to a magnetic part 11 of a multiple movable lens 3, allowing each movable lens 3 to be driven independently by the drive unit 1. Thus, in the axial cross-sectional direction of the coils 12, the multiple coils 12 of the same coil group 13 are configured with identical shapes. This facilitates the superposition of the induced magnetic fields generated by the multiple coils 12 of each coil group 13, accurately driving the movable lens 3. Simultaneously, configuring the coils 12 of adjacent coil groups 13 with different shapes helps to adjust the shape of the magnetic part 11 accordingly based on the shape of the coil 12. This avoids interference from the induced magnetic field generated by the coil group 13 to the magnetic parts 11 corresponding to adjacent coil groups 13, increasing the travel distance of the movable lens 3.

[0088] In some implementations, such as Figure 2 As shown, coil 12 has an inner ring surface 14 and an outer ring surface 15 that are opposite to each other. The inner ring surface 14 faces the center of the coil and is located inside the outer ring surface 15. Further referencing... Figure 8 As shown, in the arrangement direction of the multiple coils 12 (as indicated by arrow C in the figure), the widths of the coils 12 in adjacent coil groups 13 and the thickness between the inner ring surface 14 and the outer ring surface 15 are different. Therefore, during the left-right movement of the magnetic part 11, the difference in the width of the coils 12 in the two coil groups 13 results in a more significant difference in the induced magnetic fields presented by the two coil groups 13. The difference in width between each magnetic part 11 allows the coil group 13 to drive the corresponding magnetic part 11.

[0089] In some embodiments, the coil body includes two first straight edges and two second straight edges in the circumferential direction. The two second straight edges are located between the two first straight edges, which extend parallel to each other along straight lines. The direction of extension of the first straight edges is perpendicular to the arrangement direction of the plurality of coils 12.

[0090] In some implementations, such as Figure 4 As shown, the plurality of coil groups 13 include a first coil group 131 and a second coil group 132. Further referencing... Figure 2 As shown, the multiple movable lenses 3 include a first lens 32 and a second lens 33. The magnetic part 11 of the first lens 32 includes a first magnetic body 111, and the magnetic part 11 of the second lens 33 includes a second magnetic body 112. In the arrangement direction of the multiple coils 12, the width of the first magnetic body 111 is adapted to the width of the coils 12 of the first coil group 131, and the width of the second magnetic body 112 is adapted to the width of the coils 12 of the second coil group 132. In this embodiment, the change in distance between the first lens 32 and the second lens 33 can realize the zoom and focus functions of the lens module.

[0091] In some implementations, such as Figures 2-4 As shown, the lens module also includes a fixed lens 6. The first lens 32 and the second lens 33 are located between the light-emitting aperture and the fixed lens 6, and the second lens 33 is located between the first lens 32 and the light-emitting aperture. The number of coils 12 in the second coil group 132 is greater than the number of coils 12 in the first coil group 131. Furthermore, in the arrangement direction of the multiple coils 12, the width and thickness of the coils 12 in the second coil group 132 are smaller than those in the first coil group 131.

[0092] Specifically, in this embodiment, the first lens 32 is a zoom lens, and the second lens 33 is a focusing lens. The overall length of the second coil group 132 is greater than that of the first coil group 131. By configuring the second coil group 132 with more coils 12 and a smaller width, the driving accuracy of the drive unit 1 on the second lens 33 can be improved. The second lens 33 can be precisely adjusted according to the position of the first lens 32, which helps the second lens 33 to focus on the incident light and ensures that the real image can be clearly presented on the imaging unit of the device.

[0093] In some implementations, such as Figure 8 As shown, the lens module can be configured in wide-angle mode. In this configuration, both the first lens 32 and the second lens 33 are moved away from the fixed lens 6 (shifted to the right), and the second lens 33 is also positioned away from the first lens 32. This increases the field of view of the lens module and enhances the depth of field.

[0094] In some implementations, such as Figure 8 As shown, the lens module can also be configured in telephoto mode. In this configuration, both the first lens 32 and the second lens 33 are close to the fixed lens 6 (shifted to the left), and the second lens 33 is positioned adjacent to the first lens 32. Therefore, the lens module can magnify distant objects and reduce the depth of field.

[0095] In some implementations, such as Figure 4 and Figure 8 As shown, both the first coil group 131 and the second coil group 132 include a first coil 21, a second coil 22, and a third coil 23. The second coil 22 is located between the first coil 21 and the third coil 23, and together with the first coil 21 and the third coil 23, forms a driving unit 16. The width of the first magnetic body 111 is the same as that of the coil 12 of the first coil group 131, and the width of the second magnetic body 112 is the same as that of the coil 12 of the second coil group 132. Further referring to... Figure 3 As shown, there are two first magnetic bodies 111 and two second magnetic bodies 112. The two first magnetic bodies 111 are arranged side by side with their magnetic poles facing opposite directions, and the two second magnetic bodies 112 are arranged side by side with their magnetic poles facing opposite directions.

[0096] Specifically, the north pole of one second magnetic body 112 and the south pole of another second magnetic body 112 face the coil group 13, and the north pole of one first magnetic body 111 and the south pole of another first magnetic body 111 face the coil group 13. In this embodiment, the drive unit 1 can realize linear or staged adjustment of the movable lens 3. The coil 12 can drive the movable lens 3 through the configured drive unit 16.

[0097] In some implementations, such as Figure 8 As shown, the second coil group 132 includes two drive units 16. The first coil 21 and the third coil 23 of the two drive units 16 are arranged adjacent to each other. This allows the induced magnetic fields of the two drive units 16 to be superimposed, ensuring that the movable lens 3 can move between the two drive units 16.

[0098] Figure 9 This is a schematic diagram of the electrical signal waveforms of the lens module in this embodiment. Curves I, II, and III in the figure represent three waveforms with different phases, respectively. The vertical axis represents the magnetic field strength, and the value of this axis represents the relative value (dimensionless) of the magnetic field strength during the magnetic field change.

[0099] In some implementations, such as Figures 8-9 As shown, the drive unit 1 also includes a control circuit 8. The control circuit 8 is electrically connected to the drive unit 16 and is configured to feed a first electrical signal to the first coil 21 (as shown by curve I), a second electrical signal to the second coil 22 (as shown by curve II), and a third electrical signal to the third coil 23 (as shown by curve III). The first, second, and third electrical signals are all sinusoidal signals, with a phase difference of 120 degrees between the second and first electrical signals and a phase difference of -120 degrees between the second and third electrical signals. This enables continuous adjustment of the movable lens 3 by the control circuit 8.

[0100] Specifically, such as Figure 8As shown, taking the drive unit 16 on the right as an example, the north pole of one second magnetic body 112 and the south pole of the other second magnetic body 112 of the second lens 33 face the drive unit 16. In this configuration, the magnetic field lines of the magnetic field of the magnetic part 11 are conducted from the north pole to the south pole. These magnetic field lines bend and pass through the drive unit 16. Further referencing... Figure 9 As shown by the dashed line IIa, in this configuration, the strength of the induced magnetic field generated by the second coil 22 is 1, and this induced magnetic field is attracted to the magnetic part 11. The strength of the induced magnetic field of the first coil group 131 and the third coil 23 is -0.5, and this induced magnetic field repels the magnetic part 11. Simultaneously, their superposition cancels out part of the magnetic force of the second coil 22, causing the driving unit 16 to generate a first superimposed magnetic field. However, this first superimposed magnetic field ensures sufficient magnetic force between the second coil 22 and the magnetic part 11. Therefore, the magnetic part 11 can be aligned with the second coil 22. When the second lens 33 needs to be moved forward, the control circuit 8 can simultaneously control the waveforms of the first, second, and third electrical signals. Specifically, by adjusting the magnetic field strength of the third coil 23 to a positive value and correspondingly reducing the magnetic field strength of the second coil 22, the first superimposed magnetic field moves forward, thereby achieving linear adjustment of the position of the second lens 33 by the driving unit 1.

[0101] Figure 10 This is a schematic diagram showing the positional relationship between the movable lens and the coil provided in the second embodiment.

[0102] In some implementations, such as Figure 10 As shown, the coil group 13 includes a first coil 21, a third coil 23, and at least one second coil 22 located between the first coil 21 and the third coil 23. The drive unit 1 also includes a control circuit 8. The control circuit 8 is electrically connected to the coil group 13.

[0103] Simultaneously, multiple coils 12 are arranged sequentially along the propagation direction of the second segment of the optical path. The control circuit 8 is configured such that, in the arrangement direction of the multiple coils 12, the magnetic field direction of the second coil 22 is opposite to that of an adjacent coil 12 on the front side, forming a second drive pair 182; and the magnetic field direction of the second coil 22 is opposite to that of an adjacent coil 12 on the rear side, forming a first drive pair 181. Furthermore, the magnetic field direction of the same second coil 22 is opposite in the corresponding first drive pair 181 and second drive pair 182.

[0104] Specifically, such as Figure 10As shown, taking the coil group 13 on the right as an example, when the magnetic part 11 of the second lens 33 is in its current position, the two second magnetic bodies 112 are in a relative state with the second coil 22 and the first coil 21 of the first drive pair 181, respectively (the second lens 33 is in the first position). The north pole of the second magnetic body 112 on the left faces the second coil 22, and the south pole of the second magnetic body 112 on the right faces the first coil 21. In this configuration, the control circuit 8 controls the south pole of the induced magnetic field of the second coil 22 and the north pole of the induced magnetic field of the first coil 21 to face the magnetic part 11. The other coils 12 of the coil group 13 can be idle, that is, they do not generate a magnetic field. When the drive unit 1 drives the second lens 33 to move to the second position, the control circuit 8 controls the north pole of the second coil 22 of the second drive pair 182 to face the magnetic part 11, and the south pole of the third coil 23 to face the direction of the second lens 33. The other coils 12 of the coil group 13 can be idle. In this configuration, the two second magnetic bodies 112 are attracted by the third coil 23 and the second coil 22 respectively, and thus move forward to the second position. This allows for staged adjustment of the movable lens 3. It improves the response speed of the movable lens 3 and reduces the power consumption of the drive unit 1.

[0105] In some implementations, such as Figures 2-6 As shown, the lens module also includes a base 7. The base 7 includes a mounting bracket 71. The mounting bracket 71 includes two pillars 711. The guide portion 4 includes a first guide rod 41, which is fixedly connected to the two pillars 711. The movable lens 3 includes a support portion 341 and a lens barrel 342 disposed on the support portion 341. The support portion 341 has a first groove 343 facing the first guide rod 41. The drive portion 1 includes a magnetic plate 17. The magnetic plate 17 is disposed on the side of the first guide rod 41 away from the movable lens 3. The coil assembly 13 drives the movable lens 3 to move, the magnetic force of the plurality of magnetic parts 11 acts on the magnetic plate 17, and the first groove 343 slides along the first guide rod 41.

[0106] Specifically, such as Figures 2-3 As shown, the control circuit 8 includes a circuit board with one side facing the coil assembly 13 and electrically connected to multiple coils 12. The mounting bracket 71 also includes a crossbeam 712. The crossbeam 712 is connected to the tops of two columns 711. The circuit board is attached to the crossbeam 712, and the magnetic plate 17 is attached to the side of the circuit board facing away from the coil assembly 13. By using an insert molding process, metal inserts are provided inside the support portion 341, which can improve the structural strength of the support portion 341 and reduce the deformation of the support portion 341.

[0107] Therefore, by utilizing the magnetic attraction of the first magnetic body 111 and the second magnetic body 112 to the magnetic guide plate 17, the first lens 32 and the second lens 33 are always kept close to the magnetic guide plate 17, preventing the centers of the first lens 32 and the second lens 33 from being misaligned. At the same time, it ensures that the first slide groove 343 is always in contact with the first guide rod 41. In addition, the friction between the first slide groove 343 and the first guide rod 41 can also prevent the movable lens 3 from easily shaking after the drive unit 1 is de-energized.

[0108] Figure 11 yes Figure 1 Schematic diagram of cross-section at point AA. Figure 12 yes Figure 11 A magnified view of a portion of the image.

[0109] In some implementations, such as Figure 2 and Figure 7 As shown, the seat 7 also includes a base plate 72. Further referencing... Figures 11-12 As shown, two columns 711 are erected on the base plate 72. The first sliding groove 343 is a V-shaped groove with two mutually perpendicular first contact surfaces 345. The two first contact surfaces 345 extend along the axial direction of the first guide rod 41 and abut against the first guide rod 41. The two columns 711 protrude from the base plate 72. The movable lens 3 also includes a ball bearing 35, and the lens barrel 342 is located between the ball bearing 35 and the first guide rod 41. The bearing portion 341 has a limiting groove 3411 facing the base plate 72, and the ball bearing 35 is disposed in the limiting groove 3411 and rolls along the base plate 72. In this embodiment, the cooperation between the first guide rod 41 and the ball bearing 35 improves the stability of the movement of the movable lens 3.

[0110] It is easy to understand that in this embodiment, the movable lens 3 contacts the base plate 72 via the ball bearing 35, allowing the horizontal positioning accuracy of the movable lens 3 to be controlled by the V-groove and the first guide rod 41. This prevents the movable lens 3 from wearing out rapidly during reciprocating motion. Simultaneously, it reduces the friction between the movable lens 3 and the guide portion 4, thus reducing the driving force of the first drive portion 1. Furthermore, the cross-section of the first guide rod 41 is configured as a circle. The two first contact planes 345 are tangent to the circle, thereby reducing the friction between the V-groove and the first guide rod 41.

[0111] Furthermore, such as Figure 10As shown, in the height direction of the column 711, the second magnetic body 112 and the first magnetic body 111 are located between the first guide rod 41 and the ball bearing 35. The distance between the first magnetic body 111 and the second magnetic body 112 and the central axis 41a is R1. The ball bearing 35 is in contact with the top surface of the base plate 72. In the horizontal direction (perpendicular to the height direction of the column 711), the distance between the central axis 41a and the top surface of the base plate 72 is R2. The base plate 72 applies a reaction force C1 to the ball bearing 35. Taking the second lens 33 as an example, the magnetic attraction between the second magnetic body 112 and the magnetic guide plate 17 is B1. This magnetic attraction B1 will cause the second lens 33 to generate a torque B. The torque B is the product of R1 and B1. At the same time, this magnetic attraction B1 will also cause the ball bearing 35 to generate a torque C between it and the base plate 72. The torque C is the product of R2 and C1. Therefore, by configuring the directions of torque B and torque C to be opposite and their absolute values ​​to be the same or approximately the same, the movable lens 3 is prevented from tilting under the influence of the first magnetic body 111 and the second magnetic body 112.

[0112] In an alternative implementation, the lens module in the above embodiments can be applied to an electronic device. This electronic device can be a mobile phone or a smartwatch, among other electronic devices.

[0113] In summary, the electronic device in this embodiment arranges multiple coils 12 along the same direction to form multiple coil groups 13. Each coil group 13 corresponds to a magnetic part 11 of a multiple movable lens 3, allowing each movable lens 3 to be driven independently by the drive unit 1. Thus, in the axial cross-sectional direction of the coils 12, the multiple coils 12 of the same coil group 13 are configured with identical shapes. This facilitates the superposition of the induced magnetic fields generated by the multiple coils 12 of each coil group 13, accurately driving the movable lens 3. Simultaneously, configuring the coils 12 of adjacent coil groups 13 with different shapes helps to adjust the shape of the magnetic part 11 accordingly based on the shape of the coil 12. This avoids interference from the induced magnetic field generated by the coil group 13 to the magnetic parts 11 corresponding to adjacent coil groups 13, increasing the travel distance of the movable lens 3.

[0114] The above descriptions are merely some embodiments of this utility model and are not intended to limit the scope of this utility model. For those skilled in the art, various modifications and variations can be made to this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the protection scope of this utility model.

Claims

1. A lens module, characterized in that, The lens module includes: Seat; A fixed lens is mounted in the base. A guide section is installed on one side of the fixed lens; Filters; Multiple movable lenses are movably disposed on the guide portion, each movable lens comprising a lens group, and a filter disposed on the side of the lens group away from the fixed lens; and The driving unit, installed in the base, includes a plurality of coils arranged in the same direction and a plurality of magnetic parts corresponding to the plurality of movable lenses. The magnetic parts are disposed on the corresponding movable lenses, and the plurality of coils form a plurality of coil groups corresponding to the plurality of movable lenses. In the axial cross-sectional direction of the coil, multiple coils in the same coil group have the same shape, while coils in two adjacent coil groups have different shapes. The coil group generates an induced magnetic field acting on the corresponding magnetic part to drive the movable lens to move closer to or away from the imaging part along the optical path.

2. The lens module according to claim 1, characterized in that, The coil has an inner ring surface and an outer ring surface that are opposite to each other; In the arrangement direction of the plurality of coils, the width of the coils in two adjacent coil groups and the thickness between the inner and outer annular surfaces are different.

3. The lens module according to claim 2, characterized in that, The plurality of coil groups includes a first coil group and a second coil group; The plurality of movable lenses include a first lens and a second lens, wherein the magnetic part of the first lens includes a first magnetic body, and the magnetic part of the second lens includes a second magnetic body; In the arrangement direction of the plurality of coils, the width of the first magnetic body is adapted to the width of the coil of the first coil group, and the width of the second magnetic body is adapted to the width of the coil of the second coil group.

4. The lens module according to claim 3, characterized in that, The first lens is located between the second lens and the fixed lens; The number of coils in the second coil group is greater than the number of coils in the first coil group, and in the arrangement direction of the plurality of coils, the width and thickness of the coils in the second coil group are smaller than those in the first coil group.

5. The lens module according to claim 4, characterized in that, Both the first coil group and the second coil group include a first coil, a second coil, and a third coil. The second coil is located between the first coil and the third coil and together with the first coil and the third coil forms a driving unit. The width of the first magnetic body is the same as the width of the coil in the first coil group, and the width of the second magnetic body is the same as the width of the coil in the second coil group; The number of the first magnetic body and the number of the second magnetic body are both two. The two first magnetic bodies are arranged side by side with their magnetic poles facing opposite directions, and the two second magnetic bodies are arranged side by side with their magnetic poles facing opposite directions.

6. The lens module according to claim 5, characterized in that, The drive unit also includes: A control circuit, electrically connected to the drive unit and configured to feed a first electrical signal to the first coil, a second electrical signal to the second coil, and a third electrical signal to the third coil, wherein the first, second, and third electrical signals are all sinusoidal signals, and the phase difference between the second and first electrical signals is 120 degrees, and the phase difference between the second and third electrical signals is -120 degrees.

7. The lens module according to claim 6, characterized in that, The second coil group includes two driving units, with the first and third coils of the two driving units arranged adjacent to each other.

8. The lens module according to claim 1, characterized in that, The coil group includes a first coil, a third coil, and at least one second coil located between the first coil and the third coil; The drive unit also includes: A control circuit is electrically connected to the coil group and configured such that the magnetic field direction of the second coil is opposite to that of an adjacent coil to form a first drive pair, and the magnetic field direction of the second coil is opposite to that of another adjacent coil to form a second drive pair; at the same time, the magnetic field direction of the same second coil is opposite in the corresponding first drive pair and second drive pair.

9. The lens module according to claim 1, characterized in that, The lens module also includes: The base includes a fixing frame, which includes two uprights; The guide portion includes a first guide rod, which is fixedly connected to the two columns. The movable lens includes a support portion and a lens barrel disposed on the support portion, the support portion having a first sliding groove facing the first guide rod; The drive unit includes a magnetic guide plate, which is disposed on the side of the first guide rod away from the movable lens; The coil assembly drives the movable lens to move, the magnetic force of the plurality of magnetic parts acts on the magnetic guide plate, and the first slide groove slides along the first guide rod.

10. The lens module according to claim 9, characterized in that, The base also includes a base plate, and the two columns are erected on the base plate; The first groove is a V-shaped groove, which has two mutually perpendicular first contact planes. The two first contact planes extend along the axial direction of the first guide rod and abut against the first guide rod. The movable lens also includes a ball bearing, and the lens barrel is located between the ball bearing and the first guide rod; The bearing portion has a limiting groove facing the base plate, and the ball is disposed in the limiting groove and rolls along the base plate.

11. An electronic device, characterized in that, The electronic device includes: The lens module according to any one of claims 1-10.

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