Lens module and camera device having the same

Abstract

The application discloses a lens module and a camera device with the same. The lens module according to the embodiment of the application comprises a lens barrel, a movable part and an electromagnetic driving assembly. The lens barrel is internally provided with a containing space. The movable part is used for carrying an image sensor. The part of the movable part used for carrying the image sensor is located below the containing space. The electromagnetic driving assembly comprises a coil and a magnetic body. The electromagnetic driving assembly is arranged on the side surface of the movable part. The electromagnetic driving assembly is used for driving the movable part to move so as to drive the image sensor to move. The lens module according to the embodiment of the application reduces the volume of the camera device, occupies a small space and can meet the demand of people on the thin and short camera module or camera device.

Description

Technical Field

[0001] The present invention relates to the technical field of camera equipment, and in particular to a lens module and a camera equipment having the same. Background Art

[0002] With the rapid development of multimedia technology, digital cameras, camcorders, tablet computers, and mobile phones with cameras are becoming increasingly popular among consumers. Lens modules are an indispensable component in these devices. A lens module typically consists of a lens barrel, a lens mount, a lens, a drive mechanism, and an image sensor. The lens is housed in the lens barrel, the image sensor is mounted in the lens mount, and the drive mechanism adjusts the lens, causing it to move relative to the image sensor to achieve focusing or image stabilization.

[0003] Existing focus or image stabilization lens modules utilize a drive motor or voice coil motor to displace the lens barrel or lens mount, thereby changing the distance between the lens and the image sensor to achieve focus or image stabilization. However, these lens modules are not only costly but also require a large space for lens movement due to their bulk, increasing the size of the lens module and failing to meet the demand for thin, lightweight, and compact camera modules or imaging equipment. Therefore, there is a need for a focus or image stabilization lens module that occupies a small footprint. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a lens module, which is small in size and occupies a small space, and can meet people's demand for a camera module or a camera device that is light, thin and short.

[0005] The present invention also provides a camera device having the lens module.

[0006] According to an embodiment of the first aspect of the present invention, the lens module includes a lens barrel, a movable part and an electromagnetic drive assembly, wherein a storage space is provided in the lens barrel; the movable part is used to carry an image sensor, and the part of the movable part used to carry the image sensor is located below the storage space; the electromagnetic drive assembly is provided on the side of the movable part, and the electromagnetic drive assembly is used to drive the movable part to move, thereby driving the image sensor to move.

[0007] The lens module according to the embodiment of the present invention has at least the following technical effects: a storage space is provided in the lens barrel for placing the lens assembly, the movable portion is used to carry the image sensor, and the portion used to carry the image sensor is located below the storage space, so that the image sensor can be located at the bottom of the lens assembly. The electromagnetic drive assembly is used to drive the movable portion to move, so that the distance or positional relationship between the image sensor and the lens assembly can be adjusted to achieve focusing or anti-shake. By driving the image sensor to move instead of driving the lens assembly to move, the driving force required for the lens module is smaller and the driving is more convenient. At the same time, the image sensor is relatively small, so that the space reserved for the image sensor in the lens module is also small, thereby saving the thickness of the lens module in the axial direction.

[0008] According to some embodiments of the lens module according to the embodiments of the present invention, the movable part includes a carrying plate and a side plate, the side plate is arranged on the side of the lens barrel, the carrying plate is connected to the side plate and is located at the bottom of the accommodating space, and the carrying plate is used to carry the image sensor; the electromagnetic driving component drives the side plate to move, thereby driving the carrying plate to move.

[0009] According to some embodiments of the lens module of the present invention, the lens module also includes a fixed plate, which is arranged on the side of the movable part, and the fixed plate is arranged opposite to the side plate; the electromagnetic drive component includes a coil and a magnetic body, and the coil and the magnetic body are respectively arranged on the fixed plate and the side plate.

[0010] According to some embodiments of the lens module according to the embodiments of the present invention, a groove is formed on the side plate, and the coil is embedded in the groove; and the magnetic body is disposed on the fixing plate.

[0011] According to some embodiments of the lens module according to the embodiments of the present invention, a groove is provided on the fixing plate, and the coil is embedded in the fixing plate; and the magnetic body is provided on the side plate.

[0012] According to some embodiments of the lens module according to the embodiments of the present invention, the side plate and the fixed plate are provided with sliding grooves arranged opposite to each other, the sliding grooves are enclosed to form a slideway, and balls and / or rollers are provided in the slideway.

[0013] According to some embodiments of the lens module according to the embodiments of the present invention, the lens module further includes a bearing, and the bearing is arranged between the fixed plate and the side plate, and the side plate abuts against the fixed plate through the bearing.

[0014] According to some embodiments of the lens module according to the embodiments of the present invention, the lens module further includes a Hall sensor, which is arranged on the magnetic body and is used to sense the positional relationship between the coil and the magnetic body.

[0015] According to some embodiments of the lens module of the present invention, the magnetic body includes a positive magnetic pole and a negative magnetic pole, and the positive magnetic pole and the negative magnetic pole are arranged in a vertical direction.

[0016] The camera device according to the second embodiment of the present invention includes the lens module according to the first embodiment of the present invention.

[0017] The camera device according to the embodiment of the present invention has at least the following technical effects: by adopting the above-mentioned lens module, the volume of the lens module is reduced, and the space occupied is small, which can meet people's demand for a thin, light and short camera module or camera device.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0020] Figure 1 is a schematic diagram of the overall structure of a lens module according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the lens module fixing plate and the movable part according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic structural diagram of a first driving mode of a lens module according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic structural diagram of a second driving mode of a lens module according to an embodiment of the present invention;

[0024] Figure 5 2 is a schematic structural diagram of a third driving mode of a lens module according to an embodiment of the present invention;

[0025] Figure 6 2 is a schematic structural diagram of a fourth driving mode of a lens module according to an embodiment of the present invention;

[0026] Figure 7 2 is a schematic structural diagram of a fifth driving mode of a lens module according to an embodiment of the present invention;

[0027] Reference numerals:

[0028] Lens barrel 100 , movable portion 200 , supporting plate 210 , side plate 220 , slide groove 221 , ball bearings 230 , ball bearings 240 , bearing 250 , coil 310 , magnetic body 320 , Hall sensor 321 , positive magnetic pole 322 , negative magnetic pole 323 , fixing plate 400 , groove 410 , flexible printed circuit board 500 , and housing 600 . DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference below Figures 1 to 7 The lens module according to the embodiment of the present invention is described.

[0034] For example Figure 2 and Figure 3 As shown, the lens module according to an embodiment of the present invention includes a lens barrel 100, a movable part 200 and an electromagnetic driving assembly. A accommodating space is provided in the lens barrel 100; the movable part 200 is used to carry the image sensor, and the part of the movable part 200 used to carry the image sensor is located below the accommodating space; the electromagnetic driving assembly is provided on the side of the movable part 200, and the electromagnetic driving assembly is used to drive the movable part 200 to move, thereby driving the image sensor to move.

[0035] For example Figure 2 and Figure 3 As shown, the lens module includes a lens barrel 100, a movable portion 200, and an electromagnetic drive assembly. The lens barrel 100 is provided with a storage space for accommodating the lens. The movable portion 200 is used to carry an image sensor, and the portion carrying the image sensor is located below the storage space. The image sensor is located below the storage space to receive image signals transmitted by the lens. The electromagnetic drive assembly is located on the side of the movable portion 200. The electromagnetic assembly includes a coil 310 and a magnetic body 320. By connecting one of the coil 310 and the magnetic body 320 to the movable portion 200 and fixing the other, the coil 310 is energized, so that the coil 310 is subjected to a Lorentz force in a magnetic field, causing the coil 310 and the magnetic body 320 to displace relative to each other. By changing the direction of the current in the coil 310, the movable portion 200 can be moved upward or downward, thereby causing the image sensor to move closer to or further away from the lens assembly to achieve focusing.

[0036] According to the lens module of the embodiment of the present invention, by being arranged in this way, at least the following beneficial effects can be achieved: a storage space is provided in the lens barrel 100, which can be used to place the lens assembly, the movable part 200 is used to carry the image sensor, and the part used to carry the image sensor is located below the storage space, so that the image sensor can be located at the bottom of the lens assembly, and the distance between the image sensor and the lens assembly can be adjusted by driving the movable part 200 to move by the driving assembly to achieve focusing or anti-shake. By driving the image sensor to move instead of driving the lens assembly to move, the driving force required for the lens module is smaller and the driving is more convenient. At the same time, the image sensor is small in size, so that the space reserved for the image sensor in the lens module is also small, thereby saving the thickness of the lens module in the axial direction, making the lens module small in size and occupying a small space, which can meet people's demand for a thin and light camera module or a camera device.

[0037] In some specific embodiments of the present invention, the movable portion 200 includes a supporting plate 210 and a side plate 220. The side plate 220 is arranged on the side of the lens barrel 100. The supporting plate 210 is connected to the side plate 220 and is located at the bottom of the accommodating space. The supporting plate 210 is used to support the image sensor; the electromagnetic driving component drives the side plate 220 to move, thereby driving the supporting plate 210 to move.

[0038] For example Figures 3 to 7As shown, the movable portion 200 includes a side plate 220 and a carrying plate 210. The side plate 220 is arranged on the side of the lens barrel 100. The carrying plate 210 is connected to the side plate 220 and is located at the bottom of the accommodating space. The carrying plate 210 is used to carry the image sensor so that the image sensor is located at the bottom of the lens assembly. The carrying plate 210 and the side plate 220 are connected. The electromagnetic drive assembly drives the side plate 220 to move, thereby driving the carrying plate 210 to move. The movement of the carrying plate 210 can drive the image sensor to move together, so that the position between the image sensor and the lens assembly changes, thereby achieving the effect of focusing. When the electromagnetic drive assembly drives the side plate 220 to move upward or downward, the side plate 220 drives the carrying plate 210 to move upward or downward, so that the distance between the image sensor and the lens assembly is closer or farther away, thereby achieving focusing.

[0039] In some specific embodiments of the present invention, the lens module also includes a fixed plate 400, which is arranged on the side of the movable part 200, and the fixed plate 400 is arranged opposite to the side plate 220; the electromagnetic drive component includes a coil 310 and a magnetic body 320, and the coil 310 and the magnetic body 320 of the electromagnetic drive component are respectively arranged on the fixed plate 400 and the side plate 220.

[0040] For example Figure 2 As shown, the lens module further includes a fixed plate 400, which is frame-shaped and frames the movable part 200 and the lens barrel 100. The fixed plate 400 is arranged opposite to the side plate 220. The coil 310 and the magnetic body 320 of the electromagnetic drive assembly are respectively arranged on the fixed plate 400 and the side plate 220. That is, when the coil 310 is arranged on the fixed plate 400, the magnetic body 320 is arranged on the side plate 220. Figures 3 to 6 As shown, when the coil 310 is disposed on the side plate 220, the magnetic body 320 is disposed on the fixing plate 400, for example Figure 7 One of the coil 310 and the magnetic body 320 is fixed, and the other is fixed to the side plate 220 of the movable part 200, so that the electromagnetic driving component can drive the image sensor to move to achieve focusing.

[0041] In some specific embodiments of the present invention, a groove 410 is defined on the side plate 220 , and the coil 310 is embedded in the groove 410 ; the magnetic body 320 is disposed on the fixing plate 400 .

[0042] For example Figure 7 As shown, a groove 410 is opened on the side plate 220, the coil 310 is embedded in the groove 410, and the magnetic body 320 is set on the fixed plate 400. Through such a setting, the larger coil 310 is embedded in the side plate 220, which can effectively save space in the lens module, increase space utilization, and reduce the volume of the lens module.

[0043] In some specific embodiments of the present invention, a groove 410 is defined on the fixing plate 400 , and the coil 310 is embedded in the fixing plate 400 ; the magnetic body 320 is disposed on the side plate 220 .

[0044] For example Figures 3 to 6 As shown, a groove 410 is formed on the fixed plate 400, the coil 310 is embedded in the fixed plate 400, and the magnetic body 320 is arranged on the side plate 220. This arrangement allows the relatively lightweight magnetic body 320 to be arranged on the side plate 220. When the coil 310 is energized, a Lorentz force is generated to drive the magnetic body 320 and the side plate 220 upward or downward, thereby causing the movable part 200 to drive the image sensor toward or away from the lens assembly, thereby achieving the focusing function.

[0045] By configuring in this way, the lighter magnetic body 320 is disposed on the side plate 220 , which can reduce the requirement on the driving force and make the movable part 200 easier to drive.

[0046] In some specific embodiments of the present invention, the side panels 220 and the fixed panel 400 are provided with oppositely disposed sliding grooves 221 , which enclose and form a slideway, in which balls 230 and / or rollers 240 are disposed.

[0047] For example Figure 2 、 Figure 3 and Figure 4 As shown, the side panels 220 and the fixed plate 400 are provided with opposing grooves 221, which together form a slideway. Balls 230 and / or rollers 240 are disposed within the slideway. This arrangement transforms static friction into dynamic friction during the movement between the movable portion 200 and the fixed plate 400, effectively reducing friction and making the movable portion 200 easier to drive and less susceptible to wear, thereby increasing its service life and precision. Furthermore, the arrangement of the slideway, balls 230, and rollers 240 acts as a guide for the movement of the movable portion 200, limiting its direction of movement and ensuring more precise and controllable movement.

[0048] Furthermore, a baffle can be provided on the lens module. The baffle is provided above the slide to prevent the ball 230 or the roller 240 from sliding out of the slide. At the same time, the baffle can restrict the movement of the movable part 200 to a certain extent, preventing the movable part 200 from moving too far, thereby playing a certain limiting role.

[0049] In some specific embodiments of the present invention, the lens module further includes a bearing 250 . The bearing 250 is disposed between the fixed plate 400 and the side plate 220 . The side plate 220 abuts against the fixed plate 400 through the bearing 250 .

[0050] For example Figure 5 As shown, the lens module further includes a bearing 250 , which is disposed between the fixed plate 400 and the side plate 220 . The side plate 220 abuts against the fixed plate 400 through the bearing 250 , and the bearing 250 can be a plane rolling bearing 250 .

[0051] The provision of the bearing 250 changes the mutual movement between the side plate 220 and the fixed plate 400 from static friction to dynamic friction, effectively reducing friction and making the movable portion 200 easier to drive. Furthermore, the provision of the bearing 250 is simpler, eliminating the need to machine the fixed plate 400 or the side plate 220 to form the slide groove 221. Furthermore, the bearing 250 is relatively narrow, which does not increase the distance between the side wall of the lens barrel 100 and the side plate 220, thereby minimizing the size of the imaging device and further reducing the cost.

[0052] The use of the ball bearings 230 and / or the ball bearings 230 makes the mutual movement between the side plate 220 and the side wall of the lens barrel 100 change from static friction to dynamic friction. The use of the bearings 250 between the side plate 220 and the fixed plate 400 makes the mutual movement between the side plate 220 and the side wall of the lens barrel 100 change from static friction to dynamic friction. In both embodiments, two rows of slideways and two rows of bearings 250 are provided. In fact, these two methods can be used either alone or simultaneously, both of which are within the scope of protection of the present invention. Figure 6 In the illustrated embodiment, both the slideway ball bearings 230 and the bearings 250 are used, with the slideway ball bearings 230 on one side of the side panel 220 and the bearings 250 on the other side. This arrangement reduces costs, simplifies the structure, and provides a track for relative movement between the side panel 220 and the lens sidewall, ensuring that the movable portion 200 has a defined trajectory, resulting in more precise movement and easier control.

[0053] Furthermore, magnetic members are embedded in the side panels 220 and the fixed plate 400. The magnetic force of the magnetic members allows the side panels 220 and the fixed plate 400 to abut against each other, and the side panels 220 and the sidewalls of the lens barrel 100 are then moved relative to each other via the balls 230, rollers 240, or bearings 250. The magnetic force of the magnetic members holds the side panels 220 in close contact with the sidewalls of the lens barrel 100, and the drive assembly is mounted on the outer wall of the lens barrel 100, allowing the drive assembly to conveniently drive the movable portion 200.

[0054] In some specific embodiments of the present invention, the lens module further includes a Hall sensor 321 . The Hall sensor 321 is disposed on the magnetic body 320 . The Hall sensor 321 is used to sense the positional relationship between the sensing coil 310 and the magnetic body 320 .

[0055] For example Figure 3 and Figure 4 As shown, the lens module also includes a Hall sensor 321, which is disposed on the magnetic body 320 and is used to sense the positional relationship between the coil 310 and the magnetic body 320. The Hall sensor 321 can detect changes in the magnetic flux on the coil 310, thereby sensing the positional relationship between the coil 310 and the magnetic body 320, thereby facilitating the lens module to control the position of the movable portion 200.

[0056] In some specific embodiments of the present invention, the magnetic body 320 includes a positive magnetic pole 322 and a negative magnetic pole 323 , and the positive magnetic pole 322 and the negative magnetic pole 323 are arranged in a vertical direction.

[0057] For example Figure 3 and Figure 4 As shown, the magnetic body 320 includes a positive pole 322 and a negative pole 323, and the positive pole 322 and the negative pole 323 are arranged in the vertical direction. By arranging the positive pole 322 and the negative pole 323 up and down, the magnetic flux lines of the magnetic body 320 can pass through the coil 310. When current is generated in the coil 310, a Lorentz force can be generated to move the movable part 200. By changing the direction of the current in the coil 310, the movable part 200 can be moved in the opposite direction.

[0058] Furthermore, the lens module also includes a flexible circuit board 500, such as Figure 1 、 Figure 2 and Figure 3 As shown, one end of the flexible circuit board 500 is connected to the image sensor, and the other end is used to connect to the mainboard of the imaging device. The image sensor receives the image signal transmitted by the lens assembly, converts the image signal into an electrical signal, and transmits it to the mainboard of the imaging device via the flexible circuit board 500. The portion of the flexible circuit board 500 connected to the lens module is arranged in an S-shaped curve. This allows the portion of the flexible circuit board 500 connected to the image sensor to move with the image sensor when the electromagnetic drive assembly drives the movable part 200 up and down. The S-shaped curve of the flexible circuit board 500 reserves a certain length for the flexible circuit board 500 to move, thereby not affecting the connection with the mainboard of the imaging device.

[0059] Furthermore, the lens module further includes a housing 600 , which frames components such as the fixing plate 400 , the movable portion 200 , and the lens barrel 100 .

[0060] The camera device according to the second embodiment of the present invention includes the lens module according to the first embodiment of the present invention.

[0061] The camera device according to the embodiment of the present invention adopts the above-mentioned lens module, which reduces the size of the camera device and occupies a small space, thereby meeting people's demand for a thin, light and compact camera module or camera device.

[0062] Other structures and operations of the camera apparatus according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0063] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A lens module, characterized in that: include: A lens barrel (100), wherein a receiving space is provided in the lens barrel (100); a movable portion (200), the movable portion (200) comprising a carrying plate (210) and a side plate (220), the side plate (220) being arranged on a side surface of the lens barrel (100), the carrying plate (210) being connected to the side plate (220) and being located at the bottom of the accommodating space, the carrying plate (210) being used to carry an image sensor; an electromagnetic drive component, the electromagnetic drive component being arranged on a side of the movable portion (200), and the electromagnetic drive component being used to drive the movable portion (200) to move, thereby driving the image sensor to move; A fixed plate (400), wherein the fixed plate (400) is arranged on the side of the movable part (200), the fixed plate (400) is arranged opposite to the side plate (220), and the side plate (220) and the fixed plate (400) are provided with oppositely arranged sliding grooves (221), and the sliding grooves (221) are enclosed to form a slideway, and balls (230) and / or rollers (240) are arranged in the slideway, and a baffle is arranged above the slideway to prevent the balls (230) and / or the rollers (240) from sliding out of the slideway.

2. The lens module according to claim 1, wherein: The electromagnetic drive assembly includes a coil (310) and a magnetic body (320), and the coil (310) and the magnetic body (320) are respectively arranged on the fixed plate (400) and the side plate (220).

3. The lens module according to claim 2, wherein: A groove (410) is provided on the side plate (220), and the coil (310) is embedded in the groove (410); and the magnetic body (320) is arranged on the fixing plate (400).

4. The lens module according to claim 2, wherein: A groove (410) is provided on the fixing plate (400), and the coil (310) is embedded in the fixing plate (400); and the magnetic body (320) is arranged on the side plate (220).

5. The lens module according to claim 2, wherein: The lens module further comprises a bearing (250), wherein the bearing (250) is arranged between the fixed plate (400) and the side plate (220), and the side plate (220) is in contact with the fixed plate (400) via the bearing (250).

6. The lens module according to claim 2, wherein: The lens module further comprises a Hall sensor (321), wherein the Hall sensor (321) is arranged on the magnetic body (320), and the Hall sensor (321) is used to sense the positional relationship between the coil (310) and the magnetic body (320).

7. The lens module according to claim 2, wherein: The magnetic body (320) includes a positive magnetic pole (322) and a negative magnetic pole (323), and the positive magnetic pole (322) and the negative magnetic pole (323) are arranged in a vertical direction.

8. A camera device, characterized in that: Comprising the lens module according to any one of claims 1 to 7.

Images