CN111796389A - Camera module - Google Patents
Camera module Download PDFInfo
- Publication number
- CN111796389A CN111796389A CN201910281794.6A CN201910281794A CN111796389A CN 111796389 A CN111796389 A CN 111796389A CN 201910281794 A CN201910281794 A CN 201910281794A CN 111796389 A CN111796389 A CN 111796389A
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- China
- Prior art keywords
- camera module
- movable unit
- unit
- rolling member
- disposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000005096 rolling process Methods 0.000 claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 210000000746 body region Anatomy 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention provides a camera module, comprising: a fixing unit including an accommodating space; a movable unit disposed in the accommodating space; an actuator configured to drive the movable unit in the optical axis direction, including a coil member provided on the movable unit; and a rolling member disposed between the fixed unit and the movable unit.
Description
Technical Field
The invention relates to the technical field of camera modules, in particular to a self-camera module.
Background
At present, most mobile equipment such as mobile phones and tablet computers carry camera modules, the conversion between optical signals and electric signals is realized through the camera modules, and image information is recorded and stored, so that the photographing and photographing functions are realized. Compared with the conventional Camera system, a Cell phone Camera Module (CCM) is widely used in various new-generation portable Camera devices due to its advantages of miniaturization, low power consumption, low cost, high image quality, and the like.
At present, 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 a main Board of the mobile phone. Among them, the voice coil motor is used to realize an auto-focusing function of the lens unit, and the voice coil motor generally includes a magnet, a coil, and the like as an actuator for driving the lens unit. In the working process of the camera module, current is firstly supplied to the coil, a magnetic field is generated after the coil is supplied with the current, the magnetic field generated in the coil and the magnetic field generated by the magnet interact 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 presented. Usually, a Hall Sensor (Hall-effect Sensor) may be further disposed in the voice coil motor, and the Hall Sensor is utilized to measure the change of the magnetic field in the voice coil motor, and the position of the coil or the magnet is determined according to the change of the magnetic field, thereby implementing the closed-loop control of the voice coil motor.
When the lens unit in the prior art performs focusing movement, the electromagnetic force generated between the coil and the magnet drives the lens unit to overcome the friction force applied to the outer wall to perform telescopic movement, and a large current needs to be provided for the coil, so that the lens unit can be driven to move only by the large electromagnetic force generated between the coil and the magnet.
Disclosure of Invention
The invention aims to provide a camera module, which reduces the resistance force applied to a lens unit in the moving process and improves the performance of the camera module.
In order to solve the above technical problem, the present invention provides a camera module, including:
a fixing unit including an accommodating space;
a movable unit disposed in the accommodating space;
an actuator configured to drive the movable unit in the optical axis direction, including a coil member provided on the movable unit;
and a rolling member disposed between the fixed unit and the movable unit.
Optionally, the camera module further comprises: and a support member configured to clamp the movable unit, disposed between the fixed unit and the movable unit.
Optionally, the support member includes a body region in the horizontal direction, and a clamping region extending in the vertical direction from the body region.
Optionally, a receiving groove is provided on the clamping area, and the rolling member is disposed in the receiving groove.
Optionally, the fixing unit is provided with a lower flanging structure, and a hollow structure is arranged at a position of the lower flanging structure corresponding to the clamping area.
Optionally, the supporting part is provided with a stopping part covering the accommodating groove to prevent the rolling member from falling.
Optionally, the stopping member is provided with a plurality of openings, the diameter of each opening is smaller than the diameter of the rolling member, and the rolling member protrudes out of the stopping member through the openings and contacts with the movable unit.
Optionally, the coil member is powered by the rolling member.
Optionally, the outer wall of the movable unit is provided with a conductive structure corresponding to the rolling member, and two poles of the coil member are respectively connected with the conductive structure.
Optionally, the rolling member is covered with conductive grease.
Optionally, the actuator further comprises a magnetic member disposed at the fixing unit.
Compared with the prior art, the camera module has the following beneficial effects:
according to the camera module, the rolling component is arranged between the fixed unit and the movable unit, and the rolling component enables rolling friction to be generated between the fixed unit and the movable unit, so that resistance force applied to the movable unit in the moving process is reduced.
Drawings
Fig. 1 is a cross-sectional view of a camera module according to an embodiment of the invention;
FIG. 2 is a block diagram of a support member in accordance with an embodiment of the present invention;
FIG. 3 is a block diagram of a support member in another embodiment of the present invention;
fig. 4 is a block diagram of a lower datum surface of an upper structural member in accordance with an embodiment of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather construed as limited to the embodiments set forth herein.
Next, the present invention is described in detail by using schematic diagrams, and when the embodiments of the present invention are described in detail, the schematic diagrams are only examples for convenience of description, and the scope of the present invention should not be limited herein.
In order to solve the problems in the background art, the coil, the movable unit and the upper structural part of the automatic focusing motor are assembled into an upper assembly part by taking the upper structural part of the automatic focusing motor as a reference, and the same reference is adopted in the assembly process of the coil and the movable unit, so that the assembly tolerance in the assembly process is reduced.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, a camera module according to the present invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 1, the camera module of the present invention includes a fixed unit 21 and a movable unit 50, the fixed unit 21 includes an accommodating space in which the movable unit 50 is disposed, and the fixed unit 21 is configured such that the movable unit 50 is movable in or out of the accommodating space. The rolling member 60 is disposed between the fixed unit 21 and the movable unit 50, and the rolling member 60 is, for example, a spherical structure, and is in contact with the movable unit 50 to generate rolling friction between the fixed unit 21 and the movable unit 50. In the present invention, the fixed unit 21 is, for example, a housing of a camera module, the movable unit 50 is, for example, a lens barrel module of the camera module, a lens unit is disposed in the lens barrel module, and the lens unit moves along with the lens barrel module during the focusing process of the module.
The actuator is configured to drive the movable unit 50 in the optical axis direction (Z direction), and includes a coil member 40 provided on the movable unit 50, a magnetic member 22 provided in the fixed unit 21. In the working process of the camera module, the coil member 40 is electrified to generate a magnetic field, electromagnetic force is generated between the magnetic member 22 and the coil member 40, and the movable unit is driven by the electromagnetic force to move along the optical axis direction. The coil member 40 serves as a mover during the transportation of the movable unit 50, and the magnetic part 22 serves as a stator to be kept stationary.
Referring to fig. 1 and 2, the camera module of the present invention includes a supporting member 14, the supporting member 14 includes a body region 141 in a horizontal direction (a plane in which XY directions are located), and a plurality of clamping regions 142 extending in a vertical direction (Z direction) from the body region, the clamping regions 142 are in contact with the lens barrel module 50, and at least one clamping region 142 provides a force perpendicular to an optical axis direction to the lens barrel module 50 to fix the lens barrel module 50. A receiving groove 1421 is disposed on the clamping area 142, and the rolling member 60 is disposed in the receiving groove 1421. The rolling members 60 are, for example, spherical structures, and a plurality of rolling members, for example, two rolling members, may be disposed in each receiving groove 1421.
The supporting part 14 is provided with a stopping part 1422 covering the receiving groove 1421 to prevent the rolling member 60 from falling. The stopping member 1422 is provided with a plurality of openings 1423, the diameter of the openings 1423 is smaller than the diameter of the rolling member 60, and the rolling member 60 protrudes out of the stopping member 1422 through the openings 1423 and contacts the movable unit 50.
The receiving groove 1421 is fixedly connected to the stopping part 1422. In the embodiment of fig. 2, the clamping area 142 may be an integrally formed structure, a receiving groove 1421 is formed on the clamping area 142, and after the rolling member 60 is placed, a portion of the clamping area 142 away from the top of the main area 141 is bent to cover the receiving groove 1423 to form a stopping part 1422. In another embodiment, referring to fig. 3, the receiving groove 1421 is separately formed, and after the rolling member 60 is placed in the receiving groove 1421, the stopping part 1422 on the clamping area 142 is fixedly connected, for example, by bonding or welding.
Further, as shown in fig. 1, fig. 2, fig. 3, and fig. 4, the camera module of the present invention includes an upper structural member 10, a plurality of limiting structures 1321 are disposed at edges of the lower reference surface 132 of the upper structural member 10, and the limiting structures 1321 are used for fixing the supporting component 14. In this embodiment, the limiting structure 1321 is a boss, and the shape thereof may be a plurality of shapes such as a circle, a square, a diamond, and a hexagon. The edge of the main body 141 of the supporting component 14 is provided with a groove 144 corresponding to the position limiting structure 1321, the groove 144 may or may not penetrate through the supporting component 14, and the shape of the groove 144 may be circular, square, diamond, hexagon, etc., and the shape thereof is correspondingly arranged according to the shape of the position limiting structure 1321. In addition, in other embodiments of the present invention, the limiting structure 1321 may also be configured as a limiting groove, and the supporting component 14 may be configured with a limiting boss correspondingly, so as to fix and assemble the supporting component 14 to the rigid structure 13, which is also within the scope of the protection concept of the present invention.
The coil member 40 is supplied with an electric signal through the rolling member 60. The supporting component 14 is further provided with a pin area (not shown in the figure) in the vertical direction (Z direction), the pin area is provided with a lead pad, the supporting component 14 is connected with the circuit board of the camera module through the lead pad, the circuit board is connected to the main board of the terminal, and the lead pad realizes electric signal transmission between the circuit board and the supporting component.
Referring to fig. 1, the outer wall of the movable unit 50 is provided with a plurality of conductive structures 70 corresponding to the rolling members 60, and both poles of the coil member 40 are connected to the conductive structures 70, respectively. In the moving process of the movable unit 50, the conductive structure 70 is always in contact with the rolling member 60, and the electrical connection between the rolling member 60 and the conductive structure 70 is maintained, so that the circuit board and the coil member 40 are always in electrical contact, and the focusing control of the camera module is realized. In order to increase the electrical conductivity of the rolling member 60, the rolling member 60 is coated with an electrically conductive grease.
With continued reference to fig. 1, the fixing unit 21 is provided with a downward flanging structure 211, and a hollow structure 2112 is provided at a position of the downward flanging structure 211 corresponding to the clamping area.
In summary, in the camera module of the present invention, the rolling member is disposed between the fixed unit and the movable unit, and the rolling member causes rolling friction between the fixed unit and the movable unit, so as to reduce resistance applied to the movable unit during movement. In addition, the rolling component realizes the electric signal transmission between the circuit board and the coil component, and the coil component is controlled to drive the movable unit to move.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (11)
1. The utility model provides a camera module which characterized in that includes:
a fixing unit including an accommodating space;
a movable unit disposed in the accommodating space;
an actuator configured to drive the movable unit in the optical axis direction, including a coil member provided on the movable unit;
and a rolling member disposed between the fixed unit and the movable unit.
2. The camera module of claim 1, wherein the camera module further comprises: and a support member configured to clamp the movable unit, disposed between the fixed unit and the movable unit.
3. The camera module of claim 2, wherein the support member includes a body region in a horizontal direction, and a grip region extending in a vertical direction from the body region.
4. The camera module of claim 3, wherein a receiving groove is provided on the clamping area, the rolling member being disposed in the receiving groove.
5. The camera module according to claim 3, wherein the fixing unit is provided with a downward flanging structure, and a hollow structure is arranged at a position of the downward flanging structure corresponding to the clamping area.
6. The camera module of claim 4, wherein the support member is provided with a stopper member covering the receiving groove to prevent the rolling member from falling.
7. The camera module according to claim 6, wherein the stopping member has a plurality of openings formed therein, the openings having a diameter smaller than a diameter of the rolling member, and the rolling member protrudes outside the stopping member through the openings and contacts the movable unit.
8. The camera module of claim 1, wherein the coil member is powered by the rolling member.
9. The camera module according to claim 8, wherein the outer wall of the movable unit is provided with a conductive structure corresponding to the rolling member, and both poles of the coil member are connected to the conductive structure, respectively.
10. The camera module of claim 8, wherein said rolling member is surrounded by conductive grease.
11. The camera module of claim 1, wherein the actuator further comprises a magnetic member disposed at the fixed unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910281794.6A CN111796389A (en) | 2019-04-09 | 2019-04-09 | Camera module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910281794.6A CN111796389A (en) | 2019-04-09 | 2019-04-09 | Camera module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111796389A true CN111796389A (en) | 2020-10-20 |
Family
ID=72805256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910281794.6A Pending CN111796389A (en) | 2019-04-09 | 2019-04-09 | Camera module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111796389A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11474416B2 (en) * | 2018-07-25 | 2022-10-18 | Tdk Taiwan Corp. | Optical member driving mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201322820Y (en) * | 2008-12-12 | 2009-10-07 | 三星高新电机（天津）有限公司 | Voice coil motor mobile phone camera with ball bearings |
| CN208444116U (en) * | 2018-05-20 | 2019-01-29 | 格科微电子（上海）有限公司 | Camera module |
| JP2019049670A (en) * | 2017-09-12 | 2019-03-28 | 日本電産コパル株式会社 | Lens drive device, imaging device and potable electronic apparatus |
| CN210666160U (en) * | 2019-04-09 | 2020-06-02 | 格科微电子（上海）有限公司 | Camera module |
-
2019
- 2019-04-09 CN CN201910281794.6A patent/CN111796389A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201322820Y (en) * | 2008-12-12 | 2009-10-07 | 三星高新电机（天津）有限公司 | Voice coil motor mobile phone camera with ball bearings |
| JP2019049670A (en) * | 2017-09-12 | 2019-03-28 | 日本電産コパル株式会社 | Lens drive device, imaging device and potable electronic apparatus |
| CN208444116U (en) * | 2018-05-20 | 2019-01-29 | 格科微电子（上海）有限公司 | Camera module |
| CN210666160U (en) * | 2019-04-09 | 2020-06-02 | 格科微电子（上海）有限公司 | Camera module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11474416B2 (en) * | 2018-07-25 | 2022-10-18 | Tdk Taiwan Corp. | Optical member driving mechanism |
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