CN215953945U - Electromagnetic camera driving device for zooming - Google Patents
Electromagnetic camera driving device for zooming Download PDFInfo
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- CN215953945U CN215953945U CN202122614673.4U CN202122614673U CN215953945U CN 215953945 U CN215953945 U CN 215953945U CN 202122614673 U CN202122614673 U CN 202122614673U CN 215953945 U CN215953945 U CN 215953945U
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Abstract
The utility model relates to an electromagnetic camera driving device for zooming, which has the technical key points that: a base; a protective shell; the camera lens unit comprises a movable lens group and a fixed lens group, wherein optical axes of the movable lens group and the fixed lens group are overlapped; the electromagnetic actuator comprises a coil assembly and magnet assemblies, wherein the coil assembly comprises a coil base arranged on the side of the base and a plurality of groups of coils arranged on the coil base, each group of coils consists of A, B, C three-phase coils arranged along the optical axis, the magnet assemblies comprise magnet bases fixed with the outer frame of the movable lens group and a plurality of magnets arranged on the magnet bases facing the coil assembly, the coils and the magnets are arranged oppositely, and the magnetic poles of two adjacent magnets are arranged oppositely; a position sensing unit. The utility model solves the problem that the existing camera lens driving device can not realize the high-power continuous optical zooming function, realizes the ultra-long-distance shooting of the lens, and has the advantages of small volume, large displacement, no magnetic interference, simple components and easy assembly.
Description
Technical Field
The present invention relates to an imaging lens driving device, and more particularly, to an electromagnetic imaging driving device for zooming, which is suitable for use in a camera of a hand-held imaging device.
Background
At present, a handheld camera device, especially a camera driving device of a mobile phone, basically and completely uses a Voice Coil Motor (VCM) to drive an entire lens, although such a method has the advantages of simple structure, mature technology, low cost, and the like, the following problems still exist:
the application scene is basically limited to medium and low load, medium and low displacement main shooting, auxiliary shooting, wide angle, micro distance, medium and low power long focus and the like, and cannot realize a high power continuous optical zooming function to realize ultra-long distance shooting due to the limitation of a lens moving mode and a driving mode. With the urgent need of ultra-long-distance shooting, the realization of the high-power continuous optical zoom function of the camera driving device has become a great problem to be solved urgently in the current hand-held camera device, especially the camera driving device of the mobile phone.
Disclosure of Invention
The utility model aims to provide an electromagnetic camera driving device for zooming, which is reasonable in structure and reliable in use, solves the problem that the conventional camera lens driving device cannot realize a high-power continuous optical zooming function, realizes the ultra-long-distance shooting of a lens, and has the advantages of small volume, large displacement, no magnetic interference, simple components and easiness in assembly.
The technical scheme of the utility model is as follows:
an electromagnetic camera driving device for zooming is technically characterized by comprising:
the base is used for limiting and supporting;
the protective shell is buckled with the base to form a protective cavity;
the camera lens unit comprises a movable lens group and a fixed lens group, wherein optical axes of the movable lens group and the fixed lens group are overlapped;
the electromagnetic actuator is used for driving the movable lens group to do linear motion along the optical axis direction, the electromagnetic actuator comprises a coil assembly and magnet assemblies corresponding to the coil assembly, the coil assembly comprises a coil seat arranged on the side of the base and a plurality of groups of coils arranged on the coil seat along the optical axis direction, each group of coils consists of A, B, C three-phase coils arranged along the optical axis, each magnet assembly comprises a magnet seat fixed with the outer frame of the movable lens group and a plurality of magnets arranged on the magnet seat towards the coil assembly side along the optical axis direction, the coils and the magnets are arranged oppositely, the magnetic poles of two adjacent magnets are arranged oppositely, and the magnet assembly is configured on at least one side of the movable lens group;
and the position sensing units comprise position sensors and signal receivers, and the number of the position sensing units is the same as that of the movable lens groups, and the position sensing units are used for sensing the position change of the movable lens groups.
In the above-mentioned electromagnetic camera driving device for zooming, the number of the fixed lens groups is two, and the fixed lens groups are respectively a first fixed lens group and a second fixed lens group which are arranged at the front side and the rear side of the movable lens group, the front end and the rear end of the base are provided with a front retaining wall and a rear retaining wall, the middle part of the front retaining wall is provided with a first fixing groove corresponding to the first fixed lens group, and the middle part of the rear retaining wall is provided with a second fixing groove corresponding to the second fixed lens group; a rolling support structure is arranged between the base and the outer frame of the movable lens group; the coil assembly is located the avris of base, the tip of preceding, back barricade is equipped with the positioning channel groove that corresponds coil assembly's coil base tip.
The above-mentioned electromagnetic type drive arrangement that makes a video recording for zooming, the roll bearing structure is including a plurality of ball grooves of the frame top surface and the bottom surface of locating movable lens group, locate the last support ball in the ball groove of movable lens group frame top surface, locate the lower support ball in the ball groove of movable lens group frame bottom surface, locate the slide of base bottom plate upper surface, the slide is parallel with the optical axis, the lower support ball is by centre gripping between the ball groove and the slide of movable lens group frame bottom surface, it is by centre gripping between the ball groove of protective housing and movable lens group frame top surface to go up the support ball.
In the above-mentioned electromagnetic camera driving device for zooming, the upper surface of the bottom plate of the base is provided with a receiver fixing groove, the bottom surface of the outer frame of the movable lens group is provided with a sensor fixing groove corresponding to the receiver fixing groove, the signal receiver of the position sensing unit is embedded in the receiver fixing groove, and the position sensor of the position sensing unit is embedded in the sensor fixing groove.
In the above-mentioned electromagnetic camera driving device for zooming, the number of the movable lens groups is two, which are respectively the first movable lens group and the second movable lens group, the number of the electromagnetic actuators is two, and the coil assemblies of the two electromagnetic actuators are respectively located at two sides of the base; the same electromagnetic actuator is provided with two magnet assemblies, the two magnet assemblies of the same electromagnetic actuator are respectively fixed at the same sides of the outer frames of the first movable lens group and the second movable lens group, and magnet seat fixing grooves corresponding to the magnet assemblies are formed in the two sides of the first movable lens group and the second movable lens group.
The electromagnetic camera driving device for zooming is characterized in that the base is an insulating base, a plurality of metal reinforcements are embedded in the base in advance, a bonding pad connected with the metal reinforcements is arranged on the upper surface of a base plate of the base, a terminal leading-out area is arranged on one side edge of the base plate of the base, and the electromagnetic actuator and the position sensing unit are connected with the terminal leading-out area through the metal reinforcements.
The utility model has the beneficial effects that:
the device adopts the matching mode of the unique structure of the magnet assembly and the coil assembly of the electromagnetic actuator, when in use, high-frequency alternating current sinusoidal electric signals with the phase difference of 120 degrees in pairs are respectively loaded on A, B, C three-phase coils in the coil assembly, and an electric field generated by the A, B, C three-phase coils is matched with a magnetic field generated by the magnet assembly after the coil assembly is electrified, so that the coil assembly makes linear motion, and further, the movable lens group is driven to move in the base along the optical axis direction. The problem of current camera lens drive arrangement can't realize the continuous optics of high power and zoom the function is solved, realize the super long-range shooting of camera lens, have small, the displacement is big, the component is simple, easily the advantage of equipment.
Drawings
FIG. 1 is a schematic structural view of the present invention (excluding the protective case);
FIG. 2 is a schematic view of the structure of the base of the present invention (a signal receiver is installed on one side of the base plate);
FIG. 3 is a schematic diagram of a combination structure of the movable lens group and the electromagnetic actuator according to the present invention;
FIG. 4 is an exploded view of the movable lens group and the magnet assembly according to the present invention;
fig. 5 is a schematic configuration diagram of an imaging lens unit of the present invention;
FIG. 6 is an exploded view of the movable lens group and the position sensing unit according to the present invention;
fig. 7 is a schematic structural view of the protective case of the present invention.
In the figure: 1. the optical lens module comprises a first fixed lens group, 2, a first movable lens group, 3, a coil holder, 4, a coil, 5, a second movable lens group, 501, a magnet holder fixing groove, 502, a sensor fixing groove, 503, a ball groove, 504, a ball groove, 6, a second fixed lens group, 7, a base, 701, a first fixing groove, 702, a second fixing groove, 703, a positioning clamping groove, 704, a receiver fixing groove, 705, a slide way, 706, a bonding pad, 707, a terminal leading-out area, 8, an upper support ball, 9, a signal receiver, 10, a magnet holder, 1001, a rectangular groove, 11, a magnet, 12, a position sensor, 13 and a protective shell.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 7, the present invention provides an electromagnetic imaging drive device for zooming, including a base 7, a protective case 13, an imaging lens unit, an electromagnetic actuator, and a position sensing unit. The base 7 is used for limiting and supporting; the protective shell 13 is buckled with the base 7 to form a protective cavity integrally; the camera shooting lens unit comprises a movable lens group and a fixed lens group, wherein the optical axes of the movable lens group and the fixed lens group are overlapped; the electromagnetic actuator is at least one and used for driving the movable lens group to do linear motion along the optical axis direction, the electromagnetic actuator comprises a coil assembly and magnet assemblies corresponding to the coil assembly, the coil assembly comprises a coil base 3 arranged on the side of the base 7 and a plurality of groups of coils 4 arranged on the coil base 3 along the optical axis direction, and each group of coils 4 consists of A, B, C three- phase coils 401, 402 and 403 arranged along the optical axis. The magnet assembly comprises a magnet seat 10 fixed with the outer frame of the movable lens group and a plurality of magnets 11 arranged on the magnet seat 10 towards the coil assembly side along the optical axis direction, the coil 4 and the magnets 11 are oppositely arranged, the magnetic poles of two adjacent magnets 11 are oppositely arranged, and the magnet assembly is configured on at least one side of the movable lens group; and position sensing units including position sensors 12 and signal receivers 9, the number of the position sensing units being the same as the number of the movable lens groups, for sensing position changes of the movable lens groups.
In this embodiment, the number of the fixed lens groups is two, which are respectively the first fixed lens group 1 and the second fixed lens group 6 disposed at the front and the rear sides of the movable lens group, the front and the rear ends of the base 7 are provided with a front retaining wall and a rear retaining wall, the middle of the front retaining wall is provided with a first fixing groove 701 corresponding to the first fixed lens group 1, and the middle of the rear retaining wall is provided with a second fixing groove 702 corresponding to the second fixed lens group 6. The number of the movable lens groups is two, which are the first movable lens group 2 and the second movable lens group 5, respectively. The image capturing lens units in other embodiments may be configured appropriately according to the design of the actual optical system, that is, according to the number of the movable lens groups designed by the optical system, not limited to the configuration number of the embodiment. The number of the electromagnetic actuators is two, and the coil assemblies of the two electromagnetic actuators are respectively positioned on two sides of the base 7. The same electromagnetic actuator is provided with two magnet assemblies, the two magnet assemblies of the same electromagnetic actuator are respectively fixed at the same side of the outer frames of the first movable lens group 2 and the second movable lens group 5, and magnet seat fixing grooves corresponding to the magnet assemblies are arranged on the two sides of the first movable lens group 2 and the second movable lens group 5.
When the magnet assemblies are arranged on one side of the movable lens group, the magnet assemblies of the first movable lens group 2 and the second movable lens group 5 are respectively arranged on two different sides, the corresponding position sensing units are also arranged on the same side of the magnet assemblies, only the positions are different, and the structure and the principle are the same. In this embodiment, the first movable lens group 2 and the second movable lens group 5 are configured with magnet components on both sides, the first movable lens group 2 and the second movable lens group 5 are symmetrically arranged, and the corresponding position sensing units are respectively located on both sides of the base 7 to avoid interference.
A rolling support structure is arranged between the base 7 and the outer frame of the movable lens group. Taking the second movable lens group as an example, the rolling support structure includes a plurality of ball grooves disposed on the top and bottom surfaces of the outer frame of the second movable lens group 5, an upper support ball 8 disposed in the ball groove 503 on the top surface of the outer frame of the second movable lens group 5, a lower support ball (omitted in the figure) disposed in the ball groove 504 on the bottom surface of the outer frame of the second movable lens group 5, and a slide 705 disposed on the upper surface of the bottom plate of the base 7. The slide 705 is parallel to the optical axis, the lower support ball is clamped between the ball groove 504 on the bottom surface of the outer frame of the second movable lens group 5 and the slide 705, and the upper support ball 8 is clamped between the protective shell 13 and the ball groove 503 on the top surface of the outer frame of the second movable lens group 5. After the protective shell 13 and the base 7 are fixed in a press fit manner, a gap is reserved between the protective shell 13 and the base 7 for the first movable lens group 2 and the second movable lens group 5, and the first movable lens group 2 and the second movable lens group 5 freely slide along the shooting optical axis under the action of external force in the protective cavity.
Taking the second movable lens group 5 as an example, two sides of the outer frame of the second movable lens group 5 are provided with magnet holder fixing grooves 501 corresponding to the magnet assemblies, and the groove bottom surfaces of the magnet holder fixing grooves 501 and the magnet holders 10 are connected by injection molding and embedding or are bonded or riveted by glue. The magnet holder 10 is made of a magnetic conductive metal, for example, a silicon steel sheet is preferable, and the magnetic conductivity of the magnetic field is enhanced. The magnet holder 10 includes a plurality of rectangular grooves 1001 arranged at intervals toward the coil assembly, and each magnet 11 in the same magnet assembly is disposed in the corresponding rectangular groove 1001 and the magnetic poles of the adjacent magnets 11 are arranged oppositely. Coil pack is located the avris of base 7, the tip of preceding, back barricade is equipped with the positioning channel groove 703 that corresponds coil pack's coil base 3 tip, and the both ends of coil base 3 are inserted respectively in the positioning channel groove 703 of preceding, back barricade, through the embedding of moulding plastics or glue bonding or riveted form fixed connection. The coil base 3 is made of a magnetic conductive metal, for example, a silicon steel sheet is preferable, and the magnetic conductivity of the magnetic field is enhanced. A receiver fixing groove 704 is formed on the upper surface of the bottom plate of the base 7, a sensor fixing groove corresponding to the receiver fixing groove 704 is formed on the bottom surface of the outer frame of the movable lens group, for example, the second movable lens group 5, a sensor fixing groove 502 corresponding to the receiver fixing groove 704 is formed on the bottom surface of the outer frame of the second movable lens group 5, the signal receiver 8 of the position sensing unit is embedded in the receiver fixing groove 704, and the position sensor 12 of the position sensing unit is embedded in the sensor fixing groove 502.
The base 7 is an insulating base, a plurality of metal reinforcements are embedded in the base 7 in advance, and the metal reinforcements are elements for conducting the position sensing unit, the electromagnetic actuator and the external control circuit at the same time. The upper surface of the bottom plate of the base 7 is provided with a bonding pad 706 connected with a metal reinforcing member, one side edge of the bottom plate of the base 7 is provided with a terminal leading-out area 707, and the electromagnetic actuator and the position sensing unit are connected with the terminal leading-out area 707 through the metal reinforcing member. The metal reinforcing member is a plurality of discontinuous structures and is made of one of metals, such as iron, copper alloy, stainless steel and the like. The structure of the base 1 is not limited to this, and it can be only plastic structure, adopting the way of signal transmission matching circuit board.
The driving method of the utility model comprises the following steps: the movable lens group is driven to linearly move along the optical axis direction by adopting the electromagnetic actuator, each group of coils 4 of the coil assembly of the same electromagnetic actuator is linearly arranged along the optical axis direction, each group of coils 4 comprises A, B, C three-phase coils, all A-phase coils in each group of coils 4 are connected in parallel or in series, all B-phase coils in each group of coils 4 are connected in parallel or in series, and all C-phase coils in each group of coils 4 are connected in parallel or in series. A. B, C the three- phase coils 401, 402, 403 are energized with currents whose phases are different by 120 °, and the electric field generated by the A, B, C three- phase coils 401, 402, 403 cooperates with the magnetic field generated by the magnets to make the magnet assembly move linearly, thereby driving the first movable lens group 2 and the second movable lens group 5 to move in the optical axis direction in the base 7. Interchanging any two groups of high-frequency alternating current sinusoidal electric signals which are introduced into A, B, C three- phase coils 401, 402 and 403 to enable the magnet assemblies to move reversely, so that a movable lens group where the magnet assemblies are located is driven to move reversely; when the first movable lens group 2 and the second movable lens group 5 move along the optical axis, the position sensors embedded at the bottoms of the first movable lens group 2 and the second movable lens group 5 and the signal receiver embedded on the base 7 move relatively, the signal receiver monitors the motion condition of the corresponding movable lens group in real time, sends a position compensation signal to a corresponding control circuit of the electromagnetic actuator, controls the movable lens group to move and adjust the corresponding position precision, so that closed-loop control is realized, and the position is repeatedly adjusted for multiple times until the preset position precision is reached.
Among the aforesaid, A, B, C three-phase coil lets in the back at the electric current, can form a magnetic field that moves along the optical axis direction around it, because adjacent magnetite magnetic pole is opposite in the magnetite subassembly, and the electric current of inserting has certain phase difference simultaneously, therefore the magnetic field that magnetite subassembly and A, B, C three-phase coil formed produces the driving force along the optical axis direction, drives the magnetite subassembly along optical axis direction rectilinear motion, and then drives portable camera lens group and removes.
The coil multiunit is arranged side by side, the effect that the magnetic pole was arranged in opposite directions: A. b, C after the three-phase coil is connected with the electric signal, it will generate certain fluctuation, the coil multi-group parallels, it can reduce the fluctuation effectively, the magnetic pole is arranged oppositely, it can increase the driving force, the lens moves more smoothly, it is convenient to zoom continuously, it can output better imaging quality.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the utility model are also within the scope of the present patent.
Claims (6)
1. An electromagnetic image pickup drive device for zooming, comprising:
the base is used for limiting and supporting;
the protective shell is buckled with the base to form a protective cavity;
the camera lens unit comprises a movable lens group and a fixed lens group, wherein optical axes of the movable lens group and the fixed lens group are overlapped;
the electromagnetic actuator is used for driving the movable lens group to do linear motion along the optical axis direction, the electromagnetic actuator comprises a coil assembly and magnet assemblies corresponding to the coil assembly, the coil assembly comprises a coil seat arranged on the side of the base and a plurality of groups of coils arranged on the coil seat along the optical axis direction, each group of coils consists of A, B, C three-phase coils arranged along the optical axis, each magnet assembly comprises a magnet seat fixed with the outer frame of the movable lens group and a plurality of magnets arranged on the magnet seat towards the coil assembly side along the optical axis direction, the coils and the magnets are arranged oppositely, the magnetic poles of two adjacent magnets are arranged oppositely, and the magnet assembly is configured on at least one side of the movable lens group;
and the position sensing units comprise position sensors and signal receivers, and the number of the position sensing units is the same as that of the movable lens groups, and the position sensing units are used for sensing the position change of the movable lens groups.
2. The electromagnetic camera driving device for zooming according to claim 1, characterized in that: the number of the fixed lens groups is two, the fixed lens groups are respectively a first fixed lens group and a second fixed lens group which are arranged at the front side and the rear side of the movable lens group, front retaining walls and rear retaining walls are arranged at the front end and the rear end of the base, a first fixing groove corresponding to the first fixed lens group is arranged in the middle of each front retaining wall, and a second fixing groove corresponding to the second fixed lens group is arranged in the middle of each rear retaining wall; a rolling support structure is arranged between the base and the outer frame of the movable lens group; the coil assembly is located the avris of base, the tip of preceding, back barricade is equipped with the positioning channel groove that corresponds coil assembly's coil base tip.
3. The electromagnetic camera driving device for zooming according to claim 2, characterized in that: the rolling support structure comprises a plurality of ball grooves arranged on the top surface and the bottom surface of the outer frame of the movable lens group, an upper support ball arranged in the ball groove on the top surface of the outer frame of the movable lens group, a lower support ball arranged in the ball groove on the bottom surface of the outer frame of the movable lens group, and a slide arranged on the upper surface of the base bottom plate, wherein the slide is parallel to the optical axis, the lower support ball is clamped between the ball groove and the slide on the bottom surface of the outer frame of the movable lens group, and the upper support ball is clamped between the protective shell and the ball groove on the top surface of the outer frame of the movable lens group.
4. The electromagnetic camera driving device for zooming according to claim 1, characterized in that: the upper surface of the bottom plate of the base is provided with a receiver fixing groove, the bottom surface of the outer frame of the movable lens group is provided with an inductor fixing groove corresponding to the receiver fixing groove, the signal receiver of the position sensing unit is embedded in the receiver fixing groove, and the position inductor of the position sensing unit is embedded in the inductor fixing groove.
5. The electromagnetic camera driving device for zooming according to claim 1, characterized in that: the number of the movable lens groups is two, the movable lens groups are respectively a first movable lens group and a second movable lens group, the number of the electromagnetic actuators is two, and the coil assemblies of the two electromagnetic actuators are respectively positioned on two sides of the base; the same electromagnetic actuator is provided with two magnet assemblies, the two magnet assemblies of the same electromagnetic actuator are respectively fixed at the same sides of the outer frames of the first movable lens group and the second movable lens group, and magnet seat fixing grooves corresponding to the magnet assemblies are formed in the two sides of the first movable lens group and the second movable lens group.
6. The electromagnetic camera driving device for zooming according to claim 1, characterized in that: the base is an insulating base, a plurality of metal reinforcements are embedded in the base in advance, a bonding pad connected with the metal reinforcements is arranged on the upper surface of a base plate of the base, a terminal leading-out area is arranged on one side edge of the base plate of the base, and the electromagnetic actuator and the position sensing unit are connected with the terminal leading-out area through the metal reinforcements.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122614673.4U CN215953945U (en) | 2021-10-29 | 2021-10-29 | Electromagnetic camera driving device for zooming |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122614673.4U CN215953945U (en) | 2021-10-29 | 2021-10-29 | Electromagnetic camera driving device for zooming |
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| CN215953945U true CN215953945U (en) | 2022-03-04 |
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| CN202122614673.4U Active CN215953945U (en) | 2021-10-29 | 2021-10-29 | Electromagnetic camera driving device for zooming |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115629459A (en) * | 2022-10-21 | 2023-01-20 | 荣耀终端有限公司 | Lens barrel assembly and manufacturing method thereof, voice coil motor, camera module and terminal equipment |
| CN117674537A (en) * | 2024-01-30 | 2024-03-08 | 基合半导体（宁波）有限公司 | Focusing motor, closed-loop control method of focusing motor and image pickup apparatus |
-
2021
- 2021-10-29 CN CN202122614673.4U patent/CN215953945U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115629459A (en) * | 2022-10-21 | 2023-01-20 | 荣耀终端有限公司 | Lens barrel assembly and manufacturing method thereof, voice coil motor, camera module and terminal equipment |
| CN117674537A (en) * | 2024-01-30 | 2024-03-08 | 基合半导体（宁波）有限公司 | Focusing motor, closed-loop control method of focusing motor and image pickup apparatus |
| CN117674537B (en) * | 2024-01-30 | 2024-06-04 | 基合半导体（宁波）有限公司 | Focusing motor, closed-loop control method of focusing motor and image pickup apparatus |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Electromagnetic camera driver for zoom Effective date of registration: 20220929 Granted publication date: 20220304 Pledgee: China Construction Bank Corporation Panjin branch Pledgor: Liaoning Zhonglan Photoelectric Technology Co.,Ltd. Registration number: Y2022210000157 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |