Camera module and digital device

Abstract

The present invention relates to a camera module and a digital device. The camera module includes: a moving unit that drives a lens unit to move along the optical axis direction; an elastic device that is adapted to be disposed on one side of the moving unit and contacts the moving unit to generate elastic deformation, thereby applying a squeezing force to the moving unit. The resultant force direction of the squeezing force points to the optical axis and is perpendicular to the optical axis direction. The camera module of the present invention can continuously and stably supply current to a coil, and can ensure that the optical axis remains stable during the movement of the moving unit.

Description

Technical Field

[0001] The present invention relates to the technical field of camera modules, and in particular, to a camera module and a digital device. Background Art

[0002] Currently, most mobile devices such as mobile phones and tablet computers are equipped with camera modules, which convert optical signals into electrical signals, record and save image information, so as to realize the functions of taking pictures and shooting videos. Compared with traditional camera systems, the cell phone camera module (CCM) is widely used in various new-generation portable camera devices due to its advantages such as miniaturization, low power consumption, low cost, and high image quality.

[0003] Currently, the structure of the camera module includes a lens unit, a voice coil motor (VCM), an infrared cut-off filter, an image sensor, a flexible printed circuit board (FPC) or a printed circuit board (PCB), and a connector connected to the mobile phone motherboard. Among them, the voice coil motor is used to realize the autofocus function of the lens unit, and the voice coil motor usually includes structures such as a magnet and a coil. During the operation of the camera module, current is first applied to the coil, and the energized coil cuts the magnetic induction line in the magnetic field to generate an electromagnetic force. The coil or the magnet moves under the action of the electromagnetic force, thereby driving the lens unit connected to the voice coil motor to move, adjusting the image distance and object distance of the camera module, and presenting a clear image. Usually, a Hall-effect Sensor can also be set in the voice coil motor to measure the change of the magnetic field in the voice coil motor, and judge the position of the coil or the magnet according to the change of the magnetic field, so as to realize the closed-loop control of the voice coil motor. The most common autofocus function in mobile phone cameras is completely completed by the entire driver.

[0004] With the rapid development of the smart phone industry, people's requirements for the imaging effect of mobile phone cameras are also gradually increasing. The focal length zoom range is an important factor affecting the imaging effect of mobile phone cameras. This requires the voice coil motor to be able to drive with a large stroke, and the large-stroke movement requires the camera to be stable within the stroke range, which puts forward higher requirements for the stability of the voice coil motor. Summary of the Invention

[0005] The purpose of the present invention is to provide a camera module with a large stroke that can keep the camera moving stably.

[0006] In order to solve the above technical problems, the present invention provides a camera module, which includes:

[0007] A moving unit that drives the lens unit to move along the optical axis direction;

[0008] An elastic device, which is adapted to be arranged on one side of the moving unit and contacts the moving unit to generate elastic deformation, thereby applying a squeezing force to the moving unit. The resultant force direction of the squeezing force points to the optical axis and is perpendicular to the optical axis direction.

[0009] Preferably, the elastic device includes a first elastic device and a second elastic device. The resultant force of the squeezing force of the first elastic device on the moving unit and the resultant force of the squeezing force of the second elastic device on the moving unit are parallel and in the same direction.

[0010] Preferably, the first elastic device is arranged on one side of the bottom of the moving unit, and the second elastic device is arranged on one side of the top of the moving component.

[0011] Preferably, the camera module further includes: a base, and the base includes: support components evenly distributed around. The support components include a first clamping position and a second clamping position. The first elastic device includes a metal sheet and a ball arranged on the support component. One metal sheet is installed on the first clamping position, and at least one ball is installed in the second clamping position. One side of the ball is tangent to the metal sheet, and the other side is tangent to one side of the bottom of the moving unit.

[0012] Preferably, the metal sheet is: a first metal sheet or a second metal sheet. The second metal sheet includes a sub-elastic component, and the sub-elastic component is adapted to contact the ball to generate elastic deformation, thereby applying a squeezing force to the ball. The second metal sheet is located on the same side of the base.

[0013] Preferably, the moving unit further includes a coil assembly; the ball contacts the coil assembly; so that when the moving unit moves, the coil assembly is electrically connected to the focus control chip through the ball, the metal sheet.

[0014] Preferably, the camera module further includes: a base, and the metal sheet is: two deformable elastic sheets and two L-shaped rigid elastic sheets. The two deformable elastic sheets are located on the same side of the base.

[0015] Preferably, the metal sheet is: a first metal sheet or a second metal sheet. The second metal sheet includes a sub-elastic component, and the sub-elastic component is adapted to contact the ball to generate elastic deformation, thereby applying a squeezing force to the ball. The second metal sheet is located on the same side of the base.

[0016] Preferably, the moving unit further includes a coil assembly; the ball is in contact with the coil assembly; so that when the moving unit moves, the coil assembly is electrically connected to the focus control chip through the ball and the metal sheet.

[0017] Preferably, the support assembly includes:

[0018] A columnar structure located on the base and parallel to the optical axis direction;

[0019] The first clamping position is located outside the columnar structure and is adapted to accommodate a partial area of the metal sheet, and its plane is parallel to the optical axis direction;

[0020] The second clamping position is a through hole perpendicular to the plane of the metal sheet and is adapted to accommodate the ball, and is adapted to enable the ball to contact the metal sheet and the coil assembly therein.

[0021] Preferably, the moving unit includes a bearing member, the bearing member is located in the iron shell assembly, is adapted to accommodate the lens unit of the camera module, and moves up and down along the optical axis direction inside the iron shell assembly.

[0022] Preferably, the second elastic device is a lens ring, and the lens ring is fixedly arranged at the top end of the iron shell assembly.

[0023] Preferably, the camera module further includes:

[0024] A dust-proof film and a film support structure;

[0025] The film support structure is located between the iron shell assembly and the lens ring and is fixedly connected to the iron shell assembly;

[0026] The dust-proof film connects the upper part of the lens and the film support structure to isolate the inside and outside of the camera module.

[0027] Preferably, the lens ring includes a bearing part and an elastic member, the elastic member is arranged in the bearing, and the elastic force of the elastic member on the moving part is perpendicular to the optical axis direction, so as to be adapted to keep the moving direction of the lens consistent with the optical axis direction during the movement of the lens.

[0028] Preferably, the elastic member includes an elastic split ring, the bearing part includes an inner ring wall, an outer ring wall, and a ring-shaped rib located between the inner ring wall and the outer ring wall, a glue application groove is arranged on the ring-shaped rib, the elastic split ring is arranged between the outer ring wall and the ring-shaped rib, and the glue application groove is adapted to accommodate glue to stick the body of the elastic split ring and retain the elastic activity of the open end of the elastic split ring.

[0029] Preferably, the annular rib is further provided with rolling grooves adapted to place ball bearings. The rolling grooves include: a first rolling groove near both ends of the opening of the elastic opening retainer ring, and a second spherical groove near the non-opening area of the elastic opening ring. The dispensing groove is located between the first rolling groove and the second rolling groove, or between two second rolling grooves. The dispensing groove is adapted to be provided with glue to adhere the elastic opening ring.

[0030] Preferably, the first rolling groove and the second metal sheet are arranged corresponding to each other in the vertical direction.

[0031] Preferably, one metal sheet corresponds to at least one ball bearing.

[0032] Preferably, the ball bearings are steel balls or ceramic balls.

[0033] In addition, the technical solution of the present invention further provides a digital device, including:

[0034] A body main body;

[0035] The camera module as described above, the camera module is disposed in the body main body. When the camera module focuses, its lens unit extends out of the surface of the body main body by greater than or equal to 800 microns.

[0036] Compared with the prior art, the camera module in the present invention has the following beneficial effects:

[0037] In the camera module provided in the embodiment of the present invention, through the setting of the elastic device, when the bottom of the moving unit is stressed towards one side, the resilience of the elastic device returns it to its original position to keep the movement direction of the lens unit consistent with the optical axis direction. Description of the Drawings

[0038] Figures 1 to 10 It is a schematic structural diagram of the camera module provided in the embodiment of the present invention. Detailed Embodiments

[0039] Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0040] Secondly, the present invention is described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of explanation, the schematic diagrams are only examples, and they should not limit the scope of protection of the present invention here.

[0041] To make the above objects, features, and advantages of the present invention more obvious and understandable, the structure of the camera module of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] The present invention provides a camera module, which includes:

[0043] A moving unit that drives the lens unit to move along the optical axis direction;

[0044] An elastic device, which is adapted to be disposed on one side of the moving unit and comes into contact with the moving unit to generate elastic deformation, thereby applying a squeezing force to the moving unit. The resultant force direction of the squeezing force points to the optical axis and is perpendicular to the optical axis direction.

[0045] The elastic device includes a first elastic device and a second elastic device. The resultant force of the squeezing force of the first elastic device on the moving unit and the resultant force of the squeezing force of the second elastic device on the moving unit are parallel and in the same direction.

[0046] The first elastic device is disposed on one side of the bottom of the moving unit, and the second elastic device is disposed on one side of the top of the moving component.

[0047] Specifically, this embodiment provides a camera module, referring to Figure 1 As shown, in this embodiment, the camera module includes a base 100, a moving unit 200 supported by the base 100, an iron shell assembly 300 covering and protecting the moving unit 200, a lens unit 600 that is carried by the moving unit 200 and telescopic in the iron shell assembly 300, and a lens ring 500 sleeved on the top of the lens unit. Preferably, this embodiment provides that the camera module includes a dust-proof film assembly 400 and a film support ring 401 at the top of the lens unit. In this embodiment, the moving unit 200 further includes a lens protective cover and a protective glass.

[0048] Specifically, in combination with Figure 1 , referring to Figures 2 to 8 As shown, the camera module includes:

[0049] A moving unit, the moving unit includes a coil assembly 210; a fixed unit, the fixed unit includes: a base 100, a metal sheet 130 and a ball 10, the base 100 includes: support components 101 evenly distributed around, the support components 101 include a first clamping position 11 and a second clamping position 12, the metal sheet 130 is installed on the first clamping position 11, the ball 10 is installed in the second clamping position 12, one side of the ball 10 is in tangential contact with the metal sheet 130, and the opposite side is in contact with the coil assembly 210, so as to be adapted to when the moving unit moves, the coil assembly is electrically connected to the focus control chip (not shown) of the camera module through the ball 10 and the metal sheet 130. With such a structure, the camera module can achieve a moving coil mode, and when performing shooting or photography and the camera performs telescopic movement, the coil can continuously obtain power supply through the ball 10 and the metal sheet 130, and the power supply line will not interfere with the movement of the camera.

[0050] Continuing to combine Figure 1 , in this embodiment, the moving unit 200 includes a bearing member, the bearing member is located in the iron shell assembly, is adapted to accommodate the lens unit 600 of the camera module, and moves up and down along the optical axis direction inside the iron shell assembly 300.

[0051] Specifically, in this embodiment, referring to Figure 3 as shown, the support component 101 includes: a columnar structure located on the base 100 and parallel to the optical axis direction. In this embodiment, the base 100 is a quasi-square structure, and the support components 101 are columnar structures erected at the four corners of the base. The first clamping position 11 is located outside the columnar structure, and the first clamping position 11 of each columnar structure is two relatively arranged slots, which are just adapted to accommodate the first connecting portion 31 of the metal sheet 130, and the plane where it is located is parallel to the optical axis direction; the second clamping position 12 is a through hole located in the columnar structure and opposite to the plane where the first connecting portion 31 of the metal sheet 130 is located, which is adapted to accommodate the ball 10, and is adapted to enable the ball 10 to roll therein and continuously contact the metal sheet 130, so as to continuously form an electrical conduction path with the coil assembly 210 through the metal sheet 130.

[0052] In addition, the base 100 also includes a circuit board 102, on which basic settings such as a driving chip, a Hall sensor, and a PCB circuit are provided.

[0053] Specifically, in this embodiment, as Figure 4As shown, the coil assembly 210 includes a coil body 212 and a carrier-embedded conductive block 211. The coil body 212 is a wire-wound coil, including a positive end (not labeled) and a negative end (not labeled). The carrier-embedded conductive block 211 is embedded in the shown bearing member. The carrier-embedded conductive block 211 includes a positive carrier-embedded conductive block 2111 and a negative carrier-embedded conductive block 2112. The positive end of the coil body 212 is welded to the positive carrier-embedded conductive block 2111, and the negative end of the coil body 212 is welded to the negative carrier-embedded conductive block 2112.

[0054] The welding part of the positive end of the coil body 212 and the positive carrier-embedded conductive block 2111 is on the bearing member, and the welding part of the negative end of the coil body 212 and the negative carrier-embedded conductive block 2112 is on the bearing member.

[0055] The coil body 212 is arranged on the outer ring of the support assembly 101, and the carrier-embedded conductive block 211 is embedded in the inner wall of the bearing member and contacts the ball. The carrier-embedded conductive block 211 (the positive carrier-embedded conductive block 2111 and the negative carrier-embedded conductive block 2112) has two planes, each plane is parallel to the optical axis direction and tangent to the ball.

[0056] The base 100 further includes: a wire-embedded layer 108, embedded inside the base 100, connected to the metal sheet 130, and connected to the focusing control chip of the camera module through the PCB circuit on the circuit board 102.

[0057] The wire-embedded layer 108 includes a positive embedded layer 1081 and a negative embedded layer 1082. The positive embedded layer 1081 and the positive carrier-embedded conductive block 2111 are electrically connected to the same metal sheet 130, and the negative embedded layer 1082 and the negative carrier-embedded conductive block 2112 are electrically connected to the same metal sheet 130.

[0058] Combined Figures 1 to 4 , refer to Figure 5As shown, the metal sheet 130 includes a first connecting portion 31 and a second connecting portion 32. The buried conductive wire layer 108 is welded to the first connecting portion 31, and the second connecting portion 32 is inserted into the first clamping position 11 and contacts the ball 10 in the second clamping position 12. In this embodiment, the first connecting portion 31 and the second connecting portion 32 are connected at a right angle. A positioning hole 30 is provided on the first connecting portion 31 for relative positioning with the base boss, and the buried conductive wire layer 108 is exposed between the positioning hole 30 and the second connecting portion. In other embodiments, the first connecting portion 31 and the second connecting portion 32 may be other folding angles or the two are connected in sequence to a smooth surface. For example, in one embodiment, the metal sheet is: two deformable elastic sheets and two L-shaped rigid elastic sheets, and the two deformable elastic sheets are located on the same side of the base.

[0059] Specifically, in one embodiment, in combination with Figures 1 to 3 , with reference to Figure 6 As shown, in this embodiment, the support assembly 101 further includes a third clamping position 13, and the fixing unit further includes an iron shell assembly 300. The iron shell assembly 300 includes:

[0060] An outer wall 302 and a buckle member 301 connected to the outer wall;

[0061] The outer wall 302 is disposed corresponding to the periphery of the base 100 and is adapted to accommodate the moving unit 200 therein;

[0062] The buckle member 301 is adapted to correspond to the support assembly 101 and is installed in the third clamping position 13, which can enhance the support strength of the support assembly.

[0063] In summary, as Figures 2 to 6 shown, the positive and negative electrodes of the coil body 212 respectively form a conductive path with the positive and negative electrodes of the focus control chip of the camera module through the carrier-embedded conductive block 211, the ball 10, the metal sheet 130, and the buried conductive wire layer 108.

[0064] Based on the above settings, in the camera module provided in this embodiment, the provided conductive path, through the structural and positional settings of the carrier-embedded conductive block 211, the ball 10, the metal sheet 130, and the buried conductive wire layer 108, can ensure that when the carrier assembly moves along the optical axis direction, it can continuously and stably supply current to the coil without hindering the movement of the carrier assembly.

[0065] Furthermore, through the settings of the carrier-embedded conductive block 211, the ball 10, and the metal sheet 130, it is ensured that the carrier assembly can also obtain continuous and stable current during a sufficiently long movement stroke.

[0066] Further, preferably, the materials of the carrier-embedded conductive block 211, the metal sheet 130, and the conductive wire buried layer 108 are conductive metals. In this embodiment, it can be copper.

[0067] Further, preferably, in this embodiment, the ball 10 is a steel ball. Because the hardness and conductivity of steel are relatively appropriate, and the rolling friction coefficient of the steel ball is small, the resistance of the moving parts can be reduced.

[0068] Further, preferably, in this embodiment, the surface of the ball 10 is gold-plated or silver-plated. Preferably, in this embodiment, the surface of the ball 10 is also coated with a conductive grease mixed with carbon powder or silver powder.

[0069] Further, preferably, in this embodiment, at least one ball corresponds to one metal sheet, preferably 1 to 4 balls. In this way, the power supply in the moving coil mode can be ensured to be stable within a relatively long stroke range.

[0070] In addition, further, in this embodiment, the metal sheet 130 is: the first metal sheet 131 or the second metal sheet 132. The second metal sheet 132 includes a sub-elastic member 34, and the sub-elastic member 34 is adapted to elastically deform due to the extrusion of the ball 10, so as to apply an extrusion force to the ball 10.

[0071] The positive electrode carrier-embedded conductive block 2111 or the negative electrode carrier-embedded conductive block 2112 is correspondingly electrically connected to at least the same second metal sheet 132. The second metal sheets 132 corresponding to the positive electrode carrier-embedded conductive block 2111 and the negative electrode carrier-embedded conductive block 2112 are located on the same side of the base 100.

[0072] In this way, when the bottom of the moving unit 200 is stressed towards one side, the sub-elastic member 34 of the second metal sheet 132 generates a clamping force due to the extrusion deformation of the ball 10, ensuring that the moving unit 200 does not disengage from the ball during movement and ensuring reliable conduction. And the resilience of the sub-elastic member 34 keeps the movement direction of the lens unit 600 consistent with the optical axis direction.

[0073] Further, the second metal sheets 132 corresponding to the positive electrode carrier-embedded conductive block 2111 and the negative electrode carrier-embedded conductive block 2112 are located on the same side of the base 100. The resultant force generated by the two second metal sheets 132 on the same side on the moving unit 200 is perpendicular to the optical axis direction and parallel to the resultant force generated by the elastic member 502 on the moving unit 200, so as to keep the moving unit 200 stable during movement.

[0074] Continue to combine Figure 1 with reference to Figures 7 to 10As shown, preferably, the fixing unit further includes a dust-proof film and a film-supporting structure; the film-supporting structure is located between the iron shell assembly and the lens ring, and is fixedly connected to the iron shell assembly; the dust-proof film connects the upper part of the lens to the film-supporting structure to isolate the inside and outside of the camera module.

[0075] The camera module further includes a lens ring 500, and the lens ring 500 is disposed on the outer ring at the top of the lens unit 600.

[0076] The lens ring 500 includes a bearing part 501 and an elastic member 502. The elastic member 502 is disposed in the bearing part 501. When the lens unit 600 is stressed in one direction, the resilience of the elastic member 502 returns it to its original position to keep the moving direction of the lens unit 600 consistent with the optical axis direction.

[0077] The elastic member includes an elastic split ring with an opening A. The bearing part includes an inner ring wall 532, an outer ring wall 531, and an annular rib 533 located between the inner ring wall 532 and the outer ring wall 531. A glue application groove 55 is provided on the annular rib 533. The elastic split ring is disposed between the outer ring wall 531 and the annular rib 533. The glue application groove 55 is adapted to accommodate glue to stick the body of the elastic split ring, while retaining the elastic activity of the open end of the elastic split ring.

[0078] A rolling groove 56 for placing a ball 19 is further provided on the annular rib 533. The rolling groove 56 includes a first rolling groove 561 near both ends of the opening A of the elastic split ring and a second rolling groove 562 near the non-opening area of the elastic split ring. The glue application groove 57 is located between the first rolling groove 561 and the second rolling groove 562, or between two second rolling grooves 562. The glue application groove is adapted to be provided with glue to stick the elastic split ring.

[0079] The first rolling groove 561 is correspondingly provided with the second metal sheet 132 in the vertical direction. That is, on the base 100 and the lens ring 500, the directions of the elastic forces provided by the metal sheet 130 or the elastic member 502 are the same.

[0080] The ball 10 is a steel ball. The friction between the steel ball and the moving part is rolling friction, and the friction coefficient is small, which can make the moving part move more smoothly.

[0081] The surface of the ball 10 is gold-plated or silver-plated. This can increase the conductivity of the ball. The number of balls corresponding to one metal sheet 130 is 1 to 3. Preferably, in this embodiment, the number of balls corresponding to one metal sheet 130 is 1.

[0082] Preferably, the ball 19 is a steel ball or a ceramic ball.

[0083] In this embodiment, a digital device is further provided, including:

[0084] A body main body; the camera module as described above, the camera module is disposed in the body main body, and when the camera module focuses, its lens unit extends 800 microns from the surface of the body main body. Preferably 1500 microns to 1600 microns.

[0085] Although the present invention has been disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A camera module, characterized in that, it includes: a moving unit that drives the lens unit to move along the optical axis direction; an elastic device adapted to be disposed on one side of the moving unit and contact the moving unit to generate elastic deformation, thereby applying a squeezing force to the moving unit, the resultant force direction of the squeezing force points to the optical axis and is perpendicular to the optical axis direction; the elastic device includes a first elastic device and a second elastic device, the resultant force of the squeezing force of the first elastic device on the moving unit and the resultant force of the squeezing force of the second elastic device on the moving unit are parallel and in the same direction, the first elastic device is disposed on one side of the bottom of the moving unit, and the second elastic device is disposed on one side of the top of the moving unit; the camera module further includes: a base, the base includes: support components evenly distributed around, the support components include a first clamping position and a second clamping position, the first elastic device includes a metal sheet and a ball disposed on the support component, one metal sheet is mounted on the first clamping position, at least one ball is mounted in the second clamping position, one side of the ball is tangent to the metal sheet, and the other side is tangent to one side of the bottom of the moving unit; the metal sheet includes a sub-elastic component, the sub-elastic component is adapted to contact the ball to generate elastic deformation, thereby applying a squeezing force to the ball, and the resilience of the sub-elastic component keeps the moving direction of the lens unit consistent with the optical axis direction; one metal sheet corresponds to at least one ball; the moving unit further includes a coil assembly, the ball contacts the coil assembly, so that when the moving unit moves, the coil assembly is electrically connected to the focus control chip through the ball, the metal sheet; the support component includes: a columnar structure located on the base and parallel to the optical axis direction, the first clamping position is located outside the columnar structure and is adapted to accommodate a partial area of the metal sheet, so that its plane is parallel to the optical axis direction, the second clamping position is a through hole perpendicular to the plane where the metal sheet is located and is adapted to accommodate the ball, and is adapted to make the ball contact the metal sheet and the coil assembly therein.

2. The camera module according to claim 1, characterized in that, the metal sheet is: two deformable elastic sheets and two L-shaped rigid elastic sheets, and the two deformable elastic sheets are located on the same side of the base.

3. The camera module according to claim 1, characterized in that, the metal sheets are located on the same side of the base.

4. The camera module according to claim 1, characterized in that, the moving unit includes a bearing component, the bearing component is located in the iron shell assembly and is adapted to accommodate the lens unit of the camera module and move up and down along the optical axis direction inside the iron shell assembly.

5. The camera module according to claim 4, characterized in that, the second elastic device is a lens ring, and the lens ring is fixedly disposed at the top end of the iron shell assembly.

6. The camera module according to claim 5, characterized in that, the camera module further includes: a dust-proof film and a film support structure; The film support structure is located between the iron shell assembly and the lens ring, and is fixedly connected to the iron shell assembly; The dust-proof film connects the upper part of the lens and the film support structure to isolate the inside and outside of the camera module.

7. The camera module according to claim 6, wherein, the lens ring includes a bearing part and an elastic member, the elastic member is disposed in the bearing, and the elastic force of the elastic member on the moving member is perpendicular to the optical axis direction, so as to be suitable for maintaining the same direction of movement as the optical axis direction during the movement of the lens.

8. The camera module according to claim 7, wherein, the elastic member includes an elastic split ring, the bearing part includes an inner ring wall, an outer ring wall, and a ring-shaped rib located between the inner ring wall and the outer ring wall, a glue application groove is provided on the ring-shaped rib, the elastic split ring is disposed between the outer ring wall and the ring-shaped rib, and the glue application groove is adapted to accommodate glue to adhere to the body of the elastic split ring, while retaining the elastic activity of the open end of the elastic split ring.

9. The camera module according to claim 8, wherein, the ring-shaped rib is further provided with a rolling groove adapted to place a ball, the rolling groove includes: a first rolling groove near the two open ends of the elastic split ring and a second rolling groove near the non-open area of the elastic split ring, the glue application groove is located between the first rolling groove and the second rolling groove, or between two second rolling grooves, and the glue application groove is adapted to apply glue to adhere to the elastic split ring.

10. The camera module according to claim 9, wherein, the first rolling groove is arranged corresponding to the metal sheet in the vertical direction.

11. The camera module according to claim 1 or 9, wherein, the ball is a steel ball or a ceramic ball.

12. A digital device, wherein, comprising: a body main body; the camera module according to claim 1, the camera module is disposed in the body main body, and when the camera module focuses, its lens unit extends out of the surface of the body main body by greater than or equal to 800 microns.

Images