Lens module and electronic device

Abstract

The utility model discloses an embodiment of lens module and electronic equipment, will movable lens set in the guide portion, and set the internal thread face with the outer thread on movable lens and rotate. The outer thread is configured as a plurality of thread segments arranged along the screw rod axial direction, and the pitches of the plurality of thread segments are different. Thus, when the screw rod rotates, a plurality of movable lenses can be simultaneously driven to move along the optical path, and the moving speeds of the plurality of movable lenses are different, so as to change the distance between the movable lenses. Therefore, zoom or focusing functions are realized, and the internal structure of the lens module is simplified. At the same time, adjusting the pitches of the thread segments can also change the moving speed and moving range of the corresponding movable lenses. On the other hand, when the first driving part is not powered, the current position of the movable lens can be limited by the screw rod, avoiding shaking. The wear phenomenon of the first driving part in long-term use is also reduced.

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 typically uses a coil and magnet combination for actuation. This method results in a complex internal structure for the camera lens assembly, increasing manufacturing costs. Furthermore, large adjustment strokes can lead to collisions and wear of internal components. Therefore, optimizing the actuation method for camera lens assemblies is a problem that needs to be addressed. Utility Model Content

[0003] In view of this, one embodiment of the present invention provides a lens module and an electronic device, which sets multiple thread segments with different pitches on the screw to drive multiple movable lenses respectively, thereby optimizing the driving method of the lens module.

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

[0005] Seat;

[0006] A fixed lens is mounted on the base.

[0007] A guide section is installed on one side of the fixed lens;

[0008] Filters;

[0009] Multiple movable lenses are movably disposed on the guide portion, each movable lens having an internal thread surface and a lens assembly, and the filter is disposed on the side of the lens assembly away from the fixed lens; and

[0010] The first driving part includes a screw with an external thread. The external thread includes multiple thread segments along the length of the screw. The multiple thread segments have different pitches and are screwed into the multiple internal thread faces respectively.

[0011] Furthermore, the external thread is a trapezoidal thread and breaks at two adjacent thread segments.

[0012] Furthermore, the plurality of threaded segments include a first threaded segment and a second threaded segment, wherein the pitch of the first threaded segment is less than that of the second threaded segment, and the axial length of the first threaded segment is less than that of the second threaded segment.

[0013] The plurality of movable lenses include a first lens corresponding to the first threaded segment and a second lens corresponding to the second threaded segment, the second lens being located between the first lens and the imaging unit.

[0014] Furthermore, the crest width of the second thread segment is greater than that of the first thread segment, and the crest diameter of the second thread segment is the same as that of the first thread segment.

[0015] Furthermore, both the first lens and the second lens have threaded grooves located on the same side of the first lens and the second lens, and the internal thread surface is formed on the inner wall of the threaded groove.

[0016] The screw passes through the two threaded grooves in sequence, and the side of the screw away from the movable lens is exposed on the outside of the threaded grooves.

[0017] Furthermore, the first driving unit includes a magnetic guide plate;

[0018] The lens module also includes:

[0019] The base includes a fixing frame, the fixing frame including two columns, the two ends of the screw being rotatably connected to the two columns, the magnetic plate being disposed on the fixing frame, and the magnetic plate and the screw being located on the same side of the movable lens; and

[0020] The second driving unit includes a first magnetic body disposed on the first lens and a second magnetic body disposed on the second lens. The second magnetic body and the first magnetic body are disposed on the side of the movable lens near the magnetic guide plate, and the magnetic force of the second magnetic body and the first magnetic body acts on the magnetic guide plate.

[0021] Furthermore, the guide portion includes a first guide rod and a second guide rod;

[0022] The first guide rod is fixedly connected to the two columns, and the movable lens is located between the first guide rod and the second guide rod;

[0023] Both the first lens and the second lens include a support portion and a lens barrel disposed on the support portion. The support portion has a first groove facing the first guide rod and a second groove facing the second guide rod.

[0024] The screw drives the first lens and the second lens to move, and the first slide groove and the second slide groove slide along the first guide rod and the second guide rod, respectively.

[0025] Furthermore, the first lens is located between the second lens and the fixed lens, and the screw drives the first lens and the second lens to move closer to or further away from the fixed lens.

[0026] Furthermore, the first drive unit also includes a worm gear, a turbine, and a drive motor disposed on the fixed frame. One end of the worm gear passes through the column and is connected to the turbine. The worm gear is fixedly connected to the output shaft of the drive motor and meshes with the turbine.

[0027] Furthermore, the supporting part of the second lens includes a first supporting body and a second supporting body. The first supporting body has a first sliding groove and a second sliding groove. The lens barrel is disposed on the second supporting body, and the second supporting body is movably disposed on the first supporting body.

[0028] The number of the second magnetic body is multiple;

[0029] The second driving unit further includes a first coil spaced apart from the plurality of second magnetic bodies. One of the second magnetic bodies and the first coil is disposed on the first carrier, and the other is disposed on the second carrier. The plurality of second magnetic bodies are arranged along the length direction of the first guide rod, and the magnetic poles of two adjacent second magnetic bodies face opposite directions.

[0030] The induced magnetic field of the first coil acts on a plurality of second magnetic bodies to drive the lens barrel closer to or away from the imaging unit via the second carrier.

[0031] Furthermore, the first carrier is provided with two third slide grooves facing different directions, and the second carrier is provided with two fourth slide grooves facing the two third slide grooves respectively;

[0032] The second lens also includes a plurality of ball bearings disposed between the third slide groove and the fourth slide groove, wherein the third slide groove moves relative to the fourth slide groove via the ball bearings.

[0033] Furthermore, the second lens also includes:

[0034] A flexible transmission line is disposed on the second lens and bends toward the first lens. The flexible transmission line includes a first end and a second end. The first end is fixedly connected to the imaging unit, and the second end is fixedly connected to the first carrier.

[0035] Furthermore, the lens module also includes a constraint part, which is disposed on the first lens and the second lens;

[0036] The constraint part is configured such that the movable lens is stationary, and the constraint part generates a constraint force to drive the two threaded segments to abut against the two internal threaded surfaces respectively.

[0037] Secondly, one embodiment of the present invention 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 includes a movable lens disposed on a guide portion, and an internal thread surface that engages with an external thread on the movable lens. The external thread is configured as multiple thread segments arranged along the screw axis, with different pitches for each thread segment. Therefore, when the screw rotates, multiple movable lenses can be moved simultaneously along the optical path, resulting in different moving speeds for each lens, thus changing the distance between them. This enables functions such as zooming or focusing, simplifying the internal structure of the lens module. Furthermore, adjusting the pitch of the thread segments can change the moving speed and range of the corresponding movable lens. On the other hand, when the first drive unit is not powered on, the screw can restrict the current position of the movable lens, giving the first drive unit a certain self-locking capability and preventing the movable lens from shaking. This also reduces wear on the first drive unit during long-term use. 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 second lens in an embodiment of this utility model;

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

[0048] Figure 8 This is a schematic diagram of the motion state of the first and second lenses in an embodiment of this utility model;

[0049] Figure 9yes Figure 1 Schematic diagram of the cross section at point AA;

[0050] Figure 10 yes Figure 9 A magnified view of a portion of the image;

[0051] Figure 11 This is a schematic diagram of the structure of the constraint part in some embodiments of the present invention;

[0052] Figure 12 This is a schematic diagram of the constraint part in some embodiments of the present invention.

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

[0054] 1-First drive unit;

[0055] 11-Screw; 111-Threaded section; 1111-First threaded section; 1112-Second threaded section;

[0056] 12-Turbine;

[0057] 13-Drive motor;

[0058] 14- Worm;

[0059] 2-Second drive unit;

[0060] 21-Second magnetic body; 22-First coil; 23-First magnetic body;

[0061] 3-Movable lens;

[0062] 31 - Internal thread surface;

[0063] 32-First Shot;

[0064] 33-Second lens; 331-Shatter;

[0065] 341-Supporting part; 3411-First support body; 3412-Second support body; 3413-Third slide groove; 3414-Fourth slide groove; 342-Lens barrel; 343-First slide groove; 344-Second slide groove; 345-First contact plane; 346-Second contact plane;

[0066] 35-ball bearing;

[0067] 36 - Flexible transmission line; 361 - First end; 362 - Second end;

[0068] 37-Magnetic plate;

[0069] 38-lens group;

[0070] 4-Guide section;

[0071] 41-First guide rod; 41a-Central axis; 42-Second guide rod;

[0072] 5 - Second coil;

[0073] 6-Fixed lens;

[0074] 7-Seal;

[0075] 71-Fixed frame; 711-Column;

[0076] 72-Base plate;

[0077] 8-Constraint section;

[0078] 811 - First connecting end; 812 - Second connecting end; 813 - Elastic zone;

[0079] 821 - Third magnetic material; 822 - Fourth magnetic material. Detailed Implementation

[0080] 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.

[0081] 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.

[0082] 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".

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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 second driving part 2, one or more movable lenses 3, a guide part 4, and a fixed lens 6 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 sequentially through the fixed lens 6 and the movable lens 3, and then exits from the light outlet hole. The optical path of the periscope lens module includes a first segment and a second segment. The first segment is where light enters the fixed lens 6, and the second segment is where light refracted by the fixed lens 6 enters the movable lens 3. The guide part 4 extends along the direction of the second segment of the optical path. The movable lens 3 is disposed on the guide part 4 and moves along the guide part 4. The movable lens 3 has an internal threaded surface 31. Optionally, the movable lens 3 may be provided with a through threaded hole or a threaded groove. The inner wall of the threaded hole or threaded groove forms the aforementioned internal thread surface 31.

[0088] 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 schematic diagram of the second lens 33 in this embodiment. Figure 8 This is a schematic diagram of the motion state of the first lens 32 and the second lens 33 in this embodiment.

[0089] In some implementations, such as Figures 4-7 As shown, the first drive unit 1 includes a screw 11. The screw 11 has an external thread. Along the length of the screw 11, the external thread includes multiple thread segments 111, the number of which can be two, three, or more. The multiple thread segments 111 have different pitches and respectively engage with multiple internal thread surfaces 31. Further referring to… Figure 8 As shown, when the screw 11 rotates, it can drive multiple movable lenses 3 along the second segment of the optical path, moving them closer to or further away from the imaging unit. In this embodiment, the guide portion 4 prevents the movable lenses 3 from rotating along with the screw 11, allowing them to move horizontally. Simultaneously, after the screw 11 rotates by a predetermined angle, the moving speeds of the movable lenses 3 in different thread segments 111 along the screw 11 axis will differ, causing a change in the distance between adjacent movable lenses 3. This satisfies the zoom or focus function of the lens module.

[0090] In summary, the lens module in this embodiment has a movable lens 3 mounted on the guide section 4, and an internal thread surface 31 that engages with the external thread is provided on the movable lens 3. The external thread is configured as multiple thread segments 111 arranged axially along the screw 11, and the pitches of the multiple thread segments 111 are different. Thus, when the screw 11 rotates, it can simultaneously drive multiple movable lenses 3 to move along the optical path, and make the moving speeds of the multiple movable lenses 3 different, thereby changing the distance between the movable lenses 3. This enables functions such as zooming or focusing, simplifying the internal structure of the lens module. At the same time, adjusting the pitch of the thread segments 111 can also change the moving speed and moving range of the corresponding movable lens 3. On the other hand, when the first drive section 1 is not powered on, the screw 11 can restrict the current position of the movable lens 3, giving the first drive section 1 a certain self-locking ability and preventing the movable lens 3 from shaking. It also reduces the wear of the first drive section 1 during long-term use.

[0091] In some implementations, such as Figure 8As shown, the external thread is configured as a trapezoidal thread to increase the structural strength of the threaded segment 111. Simultaneously, the external thread is disconnected at two adjacent threaded segments 111 (as shown in region I of the figure). Therefore, when the screw 11 rotates too much, causing the movable lens 3 to move to the end of the corresponding threaded segment 111, the disconnected external thread prevents the movable lens 3 from entering the adjacent threaded segment 111. This effectively prevents the movable lens 3 from getting stuck in the adjacent threaded segment 111.

[0092] In some implementations, such as Figure 8 As shown, the multiple thread segments 111 include a first thread segment 1111 and a second thread segment 1112. The pitch of the first thread segment 1111 is smaller than that of the second thread segment 1112, and the axial length of the first thread segment 1111 is smaller than that of the second thread segment 1112. Further referencing... Figure 2 As shown in Figure 3, the plurality of movable lenses 3 include a first lens 32 corresponding to the first threaded section 1111 and a second lens 33 corresponding to the second threaded section 1112. The second lens 33 is located between the first lens 32 and the light exit hole. During the rotation of the screw 11, the movement stroke and speed of the second lens 33 are greater than those of the first lens 32, so that the second lens 33 can coordinate with the position change of the first lens 32 to converge the focused incident light onto the imaging unit.

[0093] In some implementations, such as Figure 8 As shown, the crest width of the second thread segment 1112 is greater than that of the first thread segment 1111, and the crest diameter of the second thread segment 1112 is the same as that of the first thread segment 1111. In this embodiment, by increasing the crest width of the second thread segment 1112, the pitch of the first thread segment 1111 is increased, thereby improving the structural strength of the second thread segment 1112 and preventing deformation of the external thread of the second thread segment 1112 due to increased thread pressure.

[0094] In some implementations, such as Figure 3 As shown, both the first lens 32 and the second lens 33 have threaded grooves located on the same side of both lenses. An internal thread surface 31 is formed on the inner wall of the threaded groove. The axis of the threaded groove is parallel to the optical path, and the groove is recessed towards the center of the movable lens 3. Further referencing... Figure 4 As shown, the screw 11 passes through two threaded grooves in sequence, and the side of the screw 11 away from the movable lens 3 is exposed on the outside of the threaded grooves. In this embodiment, the screw 11 uses a partial external thread to drive the movable lens 3 to move, which not only reduces the volume of the movable lens 3, but also conducts the heat generated by friction between the external thread and the internal thread surface 31 to the outside in a timely manner, reducing the wear between the screw 11 and the movable lens 3.

[0095] In some implementations, such as Figures 2-3 As shown, the first drive unit 1 includes a magnetic guide plate 37. The magnetic guide plate 37 can be made of materials such as iron, nickel, or stainless steel. The base unit 7 includes a fixing bracket 71 and a second drive unit 2. Further referring to… Figures 4-8 As shown, the mounting bracket 71 includes two columns 711, and the two ends of the screw 11 are rotatably connected to the two columns 711. The magnetic plate 37 is disposed on the mounting bracket 71, and the magnetic plate 37 and the screw 11 are located on the same side of the movable lens 3. The second driving unit 2 includes a first magnetic body 23 disposed on the first lens 32 and a second magnetic body 21 disposed on the second lens 33. The second magnetic body 21 and the first magnetic body 23 are disposed on the side of the movable lens 3 near the magnetic plate 37, and the magnetic force of the second magnetic body 21 and the first magnetic body 23 acts on the magnetic plate 37.

[0096] This allows the screw 11 to be stably screwed into multiple threaded grooves, preventing the external thread from separating from the threaded grooves during screw 11 rotation. Simultaneously, the magnetic attraction of the first magnetic body 23 and the second magnetic body 21 to the magnetic guide plate 37 ensures that the first lens 32 and the second lens 33 are always positioned close to the screw 11, preventing the centers of the first lens 32 and the second lens 33 from shifting.

[0097] It should be noted that under the action of magnetic attraction, the threaded groove will apply positive pressure to the external thread. When the lens module is powered off, this positive pressure will generate static friction between the screw 11 and the movable lens 3, preventing the screw 11 from rotating easily and further improving the self-locking capability. Thus, it prevents the movable lens 3 from moving along the optical path after the lens module is powered off.

[0098] In some implementations, such as Figure 2 As shown, the guide section 4 includes a first guide rod 41 and a second guide rod 42. The first guide rod 41 is fixedly connected to two columns 711, and the movable lens 3 is located between the first guide rod 41 and the second guide rod 42. Further referencing... Figures 5-7 As shown, both the first lens 32 and the second lens 33 include 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 and a second groove 344 facing the second guide rod 42. When the screw 11 drives the first lens 32 and the second lens 33 to move, the first groove 343 and the second groove 344 slide along the first guide rod 41 and the second guide rod 42, respectively.

[0099] Specifically, the base 7 includes a base plate 72. Both the first lens 32 and the second lens 33 include lens groups 38, which are fixed inside the lens barrel 342. Two uprights 711 are erected on the base plate 72. The first guide rod 41 is positioned away from the base plate 72, and the second guide rod 42 is positioned close to the base plate 72. This prevents the first lens 32 and the second lens 33 from swaying during movement and ensures that the center of the lens group 38 is in the optical path. By using an insert molding process, a metal insert is placed inside the support portion 341, which improves the structural strength of the support portion 341 and reduces the deformation of the support portion 341.

[0100] In some implementations, such as Figures 2-5 As shown, the first lens 32 is a zoom lens, and the second lens 33 is a focusing lens. The first lens 32 and the second lens 33 are located between the light exit hole and the fixed lens 6, with the second lens 33 located between the first lens 32 and the light exit hole. The screw 11 is used to move the first lens 32 and the second lens 33 closer to or further away from the fixed lens 6.

[0101] In this embodiment, the first drive unit 1 can simultaneously adjust the distance between the first lens 32 and the second lens 33 and the fixed lens 6, thereby realizing the zoom and focus functions of the lens module. Furthermore, the second threaded section 1112 has a larger pitch, allowing the second lens 33 to approach or move away from the first lens 32 more quickly when the first lens 32 and the second lens 33 are close to or away from the fixed lens 6. This helps the second lens 33 to focus on the incident light, ensuring that the real image is clearly presented on the imaging unit of the device.

[0102] 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 left), 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.

[0103] 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 right), 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.

[0104] In some implementations, such as Figure 3As shown, the first drive unit 1 also includes a worm gear 14, a turbine gear 12, and a drive motor 13 mounted on the fixed frame 71. One end of the screw 11 passes through the column 711 and is connected to the turbine gear 12. The worm gear 14 is fixedly connected to the output shaft of the drive motor 13 and meshes with the turbine gear 12. The drive motor 13 can be arranged adjacent to the fixed lens 6. In this embodiment, the cooperation between the turbine gear 12 and the worm gear 14 can convert the rotational motion of the drive motor 13 into the rotation of the screw gear 11. Thus, the driving method of the first drive unit 1 is simplified.

[0105] In some implementations, such as Figures 2-7 As shown, the carrier portion 341 of the second lens 33 includes a first carrier 3411 and a second carrier 3412. The first carrier 3411 has a first groove 343 and a second groove 344. The lens barrel 342 is disposed on the second carrier 3412, and the second carrier 3412 is movably disposed on the first carrier 3411. There are multiple second magnetic bodies 21. The second driving portion 2 also includes a first coil 22 spaced apart from the multiple second magnetic bodies 21. One of the second magnetic bodies 21 and the first coil 22 is disposed on the first carrier 3411, and the other is disposed on the second carrier 3412. The multiple second magnetic bodies 21 are arranged along the length direction of the first guide rod 41, and the magnetic poles of adjacent second magnetic bodies 21 face opposite directions. The induced magnetic field of the first coil 22 acts on the multiple second magnetic bodies 21 to drive the lens barrel 342 towards or away from the imaging portion relative to the first carrier 3411 via the second carrier 3412.

[0106] Specifically, both the first drive unit 1 and the second drive unit 2 can independently drive the movement of the second lens 33. There are two second magnetic bodies 21, with the north pole of one and the south pole of the other pointing towards the guide plate 37. The second magnetic bodies 21 are disposed on the second support body 3412, and the first coil 22 is disposed on the first support body 3411. The second drive unit 2 can achieve linear or staged adjustment of the second lens 33. Taking staged adjustment as an example, when the first coil 22 is in a relative position to the two second magnetic bodies 21, the lens group 38 of the second lens 33 can be further moved along the optical path. Therefore, the second drive unit 2 can further achieve lens module focusing control.

[0107] In some implementations, such as Figures 6-7As shown, the first carrier 3411 is provided with two third slide grooves 3413 facing different directions. The second carrier 3412 is provided with two fourth slide grooves 3414 facing the two third slide grooves 3413 respectively. The second lens 33 also includes a plurality of balls 35, which are disposed between the third slide grooves 3413 and the fourth slide grooves 3414. The third slide grooves 3413 move relative to the fourth slide grooves 3414 through the balls 35. Thus, when the second carrier 3412 moves, the center of the second lens 33 can still be in the optical path.

[0108] In some implementations, such as Figure 2 and Figure 6 As shown, the second lens 33 also includes multiple spring clips 331. Each spring clip 331 includes a first connecting end, a second connecting end, and a curved extension section located between the first connecting end and the second connecting end. The first connecting end and the second connecting end are attached to the end face of the first carrier 3411 near the imaging part. When the second carrier 3412 is reset, the curved extension section abuts against the second carrier 3412. Thus, the elastic force assists the second carrier 3412 in quickly resetting, preventing the second carrier 3412 from moving excessively toward the imaging part.

[0109] In some implementations, such as Figures 5-7 As shown, the second lens 33 also includes a flexible transmission line 36. The flexible transmission line 36 is disposed on the second lens 33 and bends towards the first lens 32. The flexible transmission line 36 includes a first end 361 and a second end 362. The first end 361 is fixedly connected to the imaging unit. The second end 362 is fixedly connected to the first carrier 3411. This flexible transmission line 36 can be a ribbon cable or a flexible printed circuit board (FPC). Therefore, the bending method of the flexible transmission line 36 in this embodiment can avoid the deformation of the flexible transmission line 36 affecting the driving of the second driving unit 2.

[0110] Figure 10 yes Figure 9 A partially enlarged schematic diagram. The diagram shows the central axis 41a of the first guide rod 41.

[0111] In some implementations, such as Figures 9-10 As shown, the base 7 includes a base plate 72, and two uprights 711 are erected on the base plate 72. The first sliding groove 343 is a V-shaped groove with two mutually perpendicular first contact planes 345. The two first contact planes 345 extend along the axial direction of the first guide rod 41 and abut against the first guide rod 41. The V-shaped groove faces the side of the base plate 72. The second sliding groove 344 has a second contact plane 346, which extends along the axial direction of the second guide rod 42 and abuts against the second guide rod 42. The second contact plane 346 faces the base plate 72 and forms an angle of 45 degrees with both first contact planes 345.

[0112] It is easy to understand that in this embodiment, the movable lens 3 contacts the second guide rod 42 through the second contact plane 346, so that the horizontal positional accuracy of the movable lens 3 is controlled by the V-groove and the first guide rod 41. This avoids rapid wear of the movable lens 3 during reciprocating motion. At the same time, it reduces the friction between the movable lens 3 and the guide part 4, reducing the driving force of the first drive part 1. In addition, 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.

[0113] Furthermore, such as Figure 10 As shown, in the height direction of the column 711, the second magnetic body 21 and the first magnetic body 23 are located between the first guide rod 41 and the second guide rod 42. The distance between the first magnetic body 23 and the second magnetic body 21 and the central axis 41a is R1. The second contact plane 346 contacts the top surface of the second guide rod 42. 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 second guide rod 42 is R2. The second guide rod 42 applies a reaction force C1 to the second contact plane 346. Taking the second lens 33 as an example, the magnetic attraction between the second magnetic body 21 and the magnetic guide plate 37 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 second contact plane 346 to generate a torque C between the second guide rod 42. 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 23 and the second magnetic body 21.

[0114] In some implementations, such as Figure 10 As shown, the screw 11 is located to the left of the central axis 41a and below the magnetic plate 37. The distance from the center of the screw 11 to the central axis 41a is R3. When the screw 11 rotates clockwise, it generates a torque D acting on the movable lens 3, which is the product of the frictional force between the threaded section 111 and the internal thread surface 31 and R3. In this configuration, the torque C and torque D are in opposite directions, and the absolute value of torque C is the same as the absolute value of the sum of torque D and torque B. Conversely, when the screw 11 rotates counterclockwise, the corresponding torque D and torque C are in the same direction. In this configuration, the magnetic attraction between the first magnetic body 23 and the second magnetic body 21 and the magnetic plate 37 is configured such that the torque B corresponding to the first magnetic body 23 and the second magnetic body 21 is greater than the torque D generated by the screw 11, that is, the absolute value of torque C is the same as the difference between torque B and torque D. This ensures that the second contact plane 346 remains in contact with the second guide rod 42, guaranteeing that the movable lens 3 will not rotate along the central axis 41a during reciprocating motion.

[0115] In some implementations, such as Figure 4 and Figure 10 As shown, the first driving unit 1 also includes a second coil 5, which is disposed on the side of the magnetic plate 37 opposite to the first lens 32, and the axis of the second coil 5 is perpendicular to the magnetic plate 37. The magnetic field generated by the second coil 5 acts on the magnetic plate 37, making the magnetic plate 37 magnetic. Furthermore, the magnetic field generated by the second coil 5 attracts the magnetic fields generated by the first magnetic body 23 and the second magnetic body 21, thereby further increasing the magnetic attraction force B1 and improving the movement accuracy of the lens module.

[0116] Figure 11 and Figure 12 This is a structural schematic diagram of the constraint part 8 in different embodiments.

[0117] In some implementations, such as Figure 11 and Figure 12 As shown, the constraint part 8 is disposed on the first lens 32 and the second lens 33. During the operation of the lens module, the constraint part 8 can generate a tensile or pushing force between the first lens 32 and the second lens 33 to reduce the impact of the gap between the threaded section 111 and the internal thread surface 31 on the movement accuracy of the lens module. This tensile or pushing force is less than the driving force applied by the screw 11 to the first lens 32 and the second lens 33.

[0118] Further reference Figure 8 As shown, when the lens module is stationary, the internal thread corresponding to the first lens 32 abuts against the side of the thread in the first thread segment 1111 that is away from the second lens 33, while the internal thread corresponding to the second lens 33 abuts against the side of the thread in the second thread segment 1112 that is away from the first lens 32. This ensures the positional accuracy of the first lens 32 and the second lens 33. When the constraint part 8 is configured to generate tension, the screw 11 drives the first lens 32 and the second lens 33 forward. When the first lens 32 and the second lens 33 come to a standstill again, the tension generated by the constraint part 8 will again bring the two internal threads and the two threads together on the opposite sides. This reduces the impact of the gap between the internal and external threads on the motion accuracy. When the constraint part 8 is configured to generate thrust, the forces on the screw 11 and the movable lens 3 are reversed, and will not be described further.

[0119] Furthermore, such as Figure 11As shown, the constraint part 8 is configured as an elastic element, which includes a first connecting end 811, a second connecting end 812, and an elastic region 813. The first connecting end 811 is connected to the support part 341 of the first lens 32, and the second connecting end 812 is connected to the support part 341 of the second lens 33. Simultaneously, throughout the entire movement stroke of the first lens 32 and the second lens 33, the elastic region 813 is stretched and deformed, generating the aforementioned tensile force. Therefore, in this embodiment, as the distance between the first lens 32 and the second lens 33 gradually increases, the tensile force can be gradually increased to improve positional accuracy.

[0120] Furthermore, such as Figure 12 As shown, the constraint part 8 is configured as a magnetic structure. The magnetic structure includes a third magnetic body 821 and a fourth magnetic body 822. The polarities of the opposite sides of the third magnetic body 821 and the fourth magnetic body 822 can be configured to be the same or opposite to generate the aforementioned tensile force or the aforementioned thrust.

[0121] 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.

[0122] In summary, the electronic device in this embodiment places the movable lens 3 of the lens module on the guide part 4, and provides an internal thread surface 31 on the movable lens 3 that engages with the external thread. The external thread is configured as multiple thread segments 111 arranged axially along the screw 11, and the pitches of the multiple thread segments 111 are different. Thus, when the screw 11 rotates, it can simultaneously drive multiple movable lenses 3 to move along the optical path, and make the moving speeds of the multiple movable lenses 3 different, thereby changing the distance between the movable lenses 3. Thus, functions such as zooming or focusing are realized, simplifying the internal structure of the lens module. At the same time, adjusting the pitch of the thread segments 111 can also change the moving speed and moving range of the corresponding movable lens 3. On the other hand, when the first drive part 1 is not powered on, the screw 11 can restrict the current position of the movable lens 3, giving the first drive part 1 a certain self-locking ability and preventing the movable lens 3 from shaking. It also reduces the wear of the first drive part 1 during long-term use.

[0123] 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 on 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 having an internal thread surface and a lens assembly, and the filter is disposed on the side of the lens assembly away from the fixed lens; and The first driving part includes a screw with an external thread. The external thread includes multiple thread segments along the length of the screw. The multiple thread segments have different pitches and are screwed into the multiple internal thread faces respectively.

2. The lens module according to claim 1, characterized in that, The external thread is a trapezoidal thread and breaks at two adjacent thread segments.

3. The lens module according to claim 1, characterized in that, The plurality of threaded segments include a first threaded segment and a second threaded segment, wherein the pitch of the first threaded segment is less than that of the second threaded segment, and the axial length of the first threaded segment is less than that of the second threaded segment. The plurality of movable lenses include a first lens corresponding to the first threaded segment and a second lens corresponding to the second threaded segment, the second lens being located between the first lens and the imaging unit.

4. The lens module according to claim 3, characterized in that, The crest width of the second thread segment is greater than that of the first thread segment, and the crest diameter of the second thread segment is the same as that of the first thread segment.

5. The lens module according to claim 3, characterized in that, Both the first lens and the second lens have threaded grooves, which are located on the same side of the first lens and the second lens, and the internal thread surface is formed on the inner wall of the threaded groove. The screw passes through the two threaded grooves in sequence, and the side of the screw away from the movable lens is exposed on the outside of the threaded grooves.

6. The lens module according to claim 5, characterized in that, The first driving unit includes a magnetic guide plate; The lens module also includes: The base includes a fixing frame, the fixing frame including two columns, the two ends of the screw being rotatably connected to the two columns, the magnetic plate being disposed on the fixing frame, and the magnetic plate and the screw being located on the same side of the movable lens; and The second driving unit includes a first magnetic body disposed on the first lens and a second magnetic body disposed on the second lens. The second magnetic body and the first magnetic body are disposed on the side of the movable lens near the magnetic guide plate, and the magnetic force of the second magnetic body and the first magnetic body acts on the magnetic guide plate.

7. The lens module according to claim 6, characterized in that, The guide section includes a first guide rod and a second guide rod; The first guide rod is fixedly connected to the two columns, and the movable lens is located between the first guide rod and the second guide rod; Both the first lens and the second lens include a support portion and a lens barrel disposed on the support portion. The support portion has a first groove facing the first guide rod and a second groove facing the second guide rod. The screw drives the first lens and the second lens to move, and the first slide groove and the second slide groove slide along the first guide rod and the second guide rod, respectively.

8. The lens module according to claim 7, characterized in that, The base 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 second groove has a second contact plane that extends along the axial direction of the second guide rod and abuts against the second guide rod. The second contact plane faces the base plate and forms an angle of 45 degrees with both of the two first contact planes.

9. The lens module according to claim 3, characterized in that, The first lens is located between the second lens and the fixed lens, and the screw drives the first lens and the second lens to move closer to or away from the fixed lens.

10. The lens module according to claim 6, characterized in that, The first drive unit also includes a worm, a turbine, and a drive motor mounted on the fixed frame. One end of the worm passes through the column and is connected to the turbine. The worm is fixedly connected to the output shaft of the drive motor and meshes with the turbine.

11. The lens module according to claim 7, characterized in that, The supporting part of the second lens includes a first supporting body and a second supporting body. The first supporting body has a first sliding groove and a second sliding groove. The lens barrel is disposed on the second supporting body, and the second supporting body is movably disposed on the first supporting body. The number of the second magnetic body is multiple; The second driving unit further includes a first coil spaced apart from the plurality of second magnetic bodies. One of the second magnetic bodies and the first coil is disposed on the first carrier, and the other is disposed on the second carrier. The plurality of second magnetic bodies are arranged along the length direction of the first guide rod, and the magnetic poles of two adjacent second magnetic bodies face opposite directions. The induced magnetic field of the first coil acts on a plurality of second magnetic bodies to drive the lens barrel closer to or away from the imaging unit via the second carrier.

12. The lens module according to claim 11, characterized in that, The first carrier is provided with two third slide grooves facing different directions, and the second carrier is provided with two fourth slide grooves facing the two third slide grooves respectively; The second lens also includes a plurality of ball bearings disposed between the third slide groove and the fourth slide groove, wherein the third slide groove moves relative to the fourth slide groove via the ball bearings.

13. The lens module according to claim 11, characterized in that, The second lens also includes: A flexible transmission line is disposed on the second lens and bends toward the first lens. The flexible transmission line includes a first end and a second end. The first end is fixedly connected to the imaging unit, and the second end is fixedly connected to the first carrier.

14. The lens module according to any one of claims 4-13, characterized in that, The lens module also includes a constraint part, which is disposed on the first lens and the second lens; The constraint part is configured such that the movable lens is stationary, and the constraint part generates a constraint force to drive the two threaded segments to abut against the two internal threaded surfaces respectively.

15. An electronic device, characterized in that, The electronic device includes: The lens module according to any one of claims 1-14.

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