CN-115840277-B - Camera module and digital equipment thereof

Abstract

The invention provides a camera module and digital equipment thereof, wherein the camera module comprises a moving unit which drives a lens unit to move along the direction of an optical axis, elastic devices which are uniformly distributed around the moving unit and are contacted with the moving unit to generate elastic deformation so as to apply extrusion force to the moving unit, the resultant force direction of the extrusion force is directed to the optical axis and is perpendicular to the optical axis, the elastic devices comprise a first elastic device and a second elastic device, the resultant force of the extrusion force of the first elastic device to the moving unit is opposite to the resultant force direction of the extrusion force of the second elastic device to the moving unit, and thus when the moving unit moves along the direction of the optical axis along with the lens unit, the movement of the moving unit in the direction perpendicular to the optical axis can be well limited, and thus the movement of the moving unit in the direction perpendicular to the optical axis is very stable, thereby ensuring the stability of the movement of the camera module in the direction perpendicular to the optical axis and ensuring the imaging quality of a camera.

Inventors

• LUO JUN
• XU YONG

Assignees

• 格科微电子（上海）有限公司

Dates

Publication Date

20260512

Application Date

20210918

Claims (20)

1. 1. A camera module, comprising: The lens unit is driven to move along the optical axis direction by the moving unit, the moving unit comprises a carrier, and a groove is formed in the side wall of the carrier; A base for carrying the mobile unit; the elastic devices are uniformly distributed around the mobile unit, contact with the mobile unit and generate elastic deformation so as to apply extrusion force to the mobile unit, and the resultant force direction of the extrusion force points to the optical axis and is perpendicular to the optical axis; The elastic device comprises a first elastic device and a second elastic device, and the resultant force of the extrusion force of the first elastic device to the mobile unit is opposite to the resultant force of the extrusion force of the second elastic device to the mobile unit; at least one locking structure, locking structure is located on the base, locking structure includes: a coil unit; the magnetic unit is arranged towards the coil unit, and when the coil unit is electrified, a magnetic field generated by the coil unit interacts with a magnetic field of the magnetic unit and is used for driving the coil unit and the magnetic unit to move relatively so as to lock or unlock the moving unit; The fixing part comprises a fixing base and a sliding rail positioned on the fixing base, and the sliding rail extends along a direction parallel to the moving direction of the magnetic unit or the coil unit; An elastic supporting part, wherein one end of the elastic supporting part is fixedly arranged with the magnetic unit; the locking slide block is provided with a lock tongue, and when the mobile unit is released and unlocked, the lock tongue is positioned in the groove.
2. 2. The camera module of claim 1, further comprising a base having support assemblies uniformly distributed around the base, the support assemblies including a first support assembly and a second support assembly, the first elastic device being mounted in the first support assembly, the second elastic device being mounted in the second support assembly.
3. 3. The camera module of claim 2, wherein the first support assembly has a first clamping position and a second clamping position, the first elastic device comprises a first metal sheet clamped on the first clamping position and a first rolling element clamped on the second clamping position, one side of the first rolling element is contacted with the first metal sheet, the other side of the first rolling element passes through the second clamping position and then is contacted with a guide rail of the moving unit, and when the moving unit moves, the coil assembly of the moving unit is electrically connected with the first rolling element and the first metal sheet and the focusing control chip through the guide rail.
4. 4. A camera module as recited in claim 3, wherein the first metal sheet further has an elastic structure thereon, and the elastic structure is located on the first metal sheet and is clamped in the first clamping position.
5. 5. A camera module according to claim 3, wherein the second support assembly has a third clamping position and a fourth clamping position, the second elastic device comprises a second metal sheet clamped on the third clamping position and a second rolling member clamped on the fourth clamping position, one side of the second rolling member is contacted with the second metal sheet, the other side of the second rolling member passes through the fourth clamping position and then is contacted with a guide rail of the moving unit, and when the moving unit moves, the coil assembly of the moving unit is electrically connected with the second rolling member and the second metal sheet and the focusing control chip through the guide rail.
6. 6. The camera module of claim 5, wherein the second rolling element is a metal post or a plurality of side-by-side metal balls.
7. 7. The camera module of claim 2, wherein the carrier has a through hole corresponding to the support assembly, and the support assembly penetrates into the through hole after the carrier is mounted on the base.
8. 8. The camera module of claim 7, wherein the carrier has a lens receiving cavity extending through and protruding from a surface of the carrier, and the lens unit is sleeved in the lens receiving cavity.
9. 9. The camera module of claim 8, further comprising a lens protective sleeve having a hollow cavity therein, the lens protective sleeve being sleeved on a top end of the lens receiving cavity for moving the lens unit into the hollow cavity to be isolated from the outside when the lens unit moves.
10. 10. The camera module according to claim 9, further comprising an iron case provided corresponding to a periphery of the base for accommodating the moving unit therein, the moving unit moving up and down along an optical axis direction inside the iron case.
11. 11. The camera module of claim 10, further comprising a lens ring fixedly disposed on a top end of the iron shell.
12. 12. The camera module of claim 11, further comprising a flexible connection mechanism between the ring and the iron shell and connected to the bottom of the lens protective sleeve, wherein the flexible connection mechanism forms a space with the lens protective sleeve for preventing foreign objects from entering that affect the optical performance of the camera module.
13. 13. The camera module of claim 12, wherein the ring includes a bearing member on the flexible connection mechanism, an elastic member within the bearing member, and a third rolling element between the elastic member and the bearing member.
14. 14. The camera module of claim 13, wherein the elastic component comprises an elastic split ring, the bearing component comprises an inner ring wall, an outer ring wall, and an annular raised line between the inner ring wall and the outer ring wall, the annular raised line is provided with a dispensing slot and an opening, the dispensing slot is used for containing glue to adhere to a ring body of the elastic split ring, one side of the third rolling element is in contact with the elastic split ring, the elastic split ring is in an elastic movable state, the third rolling element is arranged in the opening, and the elastic split ring is arranged between the outer ring wall and the annular raised line.
15. 15. The camera module of claim 14, wherein the number of openings is greater than or equal to three.
16. 16. The camera module according to claim 1, wherein the elastic support portion is compressed and the moving unit is unlocked when the coil unit is energized and the coil unit and the magnetic unit are relatively moved.
17. 17. The camera module according to claim 1, wherein when the coil unit is de-energized, a magnetic field of the coil unit disappears, the magnetic unit is driven to return by the resilience of the resilient support portion, and the moving unit is locked.
18. 18. The camera module of claim 1, wherein a slider is disposed between the locking slider and the slide rail.
19. 19. The camera module of claim 1, wherein the locking slider has a receiving cavity therein, and the magnetic unit is detachably coupled to the receiving cavity.
20. 20. The camera module of claim 19, wherein the locking tongue is located on an outer wall of the receiving cavity.

Description

Camera module and digital equipment thereof Technical Field The present invention relates to camera modules, and particularly to a camera module and a digital device thereof. Background At present, most mobile devices such as mobile phones and tablet computers are provided with camera modules, and the camera modules are used for realizing conversion between optical signals and electrical signals and recording and storing image information, so that photographing and shooting functions are realized. Compared with the traditional camera system, the mobile phone camera module (Cell phone Camera Module, CCM) is widely applied to various new generation portable camera devices due to the advantages of miniaturization, low power consumption, low cost, high image quality and the like. 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 circuit board (Flexible Printed Circuit board, FPC) or a printed circuit board (Printed Circuit Board, PCB), and a connector connected to a mobile phone motherboard. The voice coil motor is used for realizing an automatic focusing function of the lens unit, and generally comprises a magnet, a coil and other structures, in the working process of the camera module, current is firstly supplied to the coil, the electrified coil cuts a magnetic induction line in a magnetic field to generate electromagnetic force, and the coil or the magnet moves under the action of the electromagnetic force, so that the lens unit connected with the voice coil motor is driven to move, the image distance and the object distance of the camera module are adjusted, and clear images are displayed. A Hall-effect Sensor (Hall-effect Sensor) may be provided in the voice coil motor, and the Hall Sensor may be used to measure a change in a magnetic field in the voice coil motor, and determine the position of the coil or the magnet based on the change in the magnetic field, thereby realizing closed-loop control of the voice coil motor. Most commonly, the auto-focus function in the camera of the mobile phone is completely completed by the whole driver. With the rapid development of the smart phone industry, the requirements of people on the imaging effect of the mobile phone camera are gradually improved. The focal length zoom range is an important factor affecting the imaging effect of the mobile phone camera. These require that the voice coil motor be capable of large stroke driving, which requires that the camera be kept stable over a range of strokes, which places high demands on the stability of the voice coil motor. Disclosure of Invention The invention solves the problem of providing a camera module capable of keeping a lens unit stably moving in an ultra-long travel range. The invention provides a camera module which comprises a moving unit, elastic devices and a first elastic device, wherein the moving unit drives a lens unit to move along the direction of an optical axis, the elastic devices are uniformly distributed around the moving unit and are in contact with the moving unit to generate elastic deformation so as to apply extrusion force to the moving unit, the resultant force direction of the extrusion force points to the optical axis and is perpendicular to the optical axis, the elastic devices comprise a first elastic device and a second elastic device, and the resultant force of the extrusion force of the first elastic device to the moving unit is opposite to the resultant force direction of the extrusion force of the second elastic device to the moving unit. Optionally, the device further comprises a base, wherein the base is provided with supporting components which are uniformly distributed all around, the supporting components comprise a first supporting component and a second supporting component, the first elastic device is installed in the first supporting component, and the second elastic device is installed in the second supporting component. Optionally, the first support component is provided with a first clamping position and a second clamping position, the first elastic device comprises a first metal sheet clamped on the first clamping position and a first rolling piece clamped on the second clamping position, one side of the first rolling piece is contacted with the first metal sheet, the other side of the first rolling piece passes through the second clamping position and then is contacted with the guide rail of the moving unit, and when the moving unit moves, the coil component of the moving unit is electrically connected with the first rolling piece, the first metal sheet and the focusing control chip through the guide rail. Optionally, the first metal sheet is further provided with an elastic structure, and the elastic structure is located on the first metal sheet and is clamped in the first clamping position. Optionally, the second support component is provided with a third clamping posit