CN112684564A

CN112684564A - Lens module and camera equipment with same

Info

Publication number: CN112684564A
Application number: CN202110049179.XA
Authority: CN
Inventors: 夏念明; 陈洪; 刘述伦
Original assignee: Dongguan Yadeng Electronics Co Ltd
Current assignee: Guangdong haideya Technology Co.,Ltd.
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-04-20

Abstract

The invention discloses a lens module and camera equipment with the same, wherein the lens module comprises a lens cone, a movable part and an electromagnetic driving assembly, and an accommodating space is arranged in the lens cone; the movable part is used for bearing an image sensor, and the part of the movable part for bearing the image sensor is positioned below the accommodating space; the electromagnetic driving assembly comprises a coil and a magnetic body, the electromagnetic driving assembly is arranged below the accommodating space, and the electromagnetic driving assembly drives the movable part to move through the Lorentz force or the magnetic force generated between the magnetic field generated by electrifying the coil and the magnetic body so as to drive the image sensor to move. According to the lens module, the focusing is realized by driving the image sensor to move instead of driving the lens component to move, so that the driving force required by the lens module is smaller, the space reserved for the image sensor by the lens module is also smaller, and the thickness in the axial direction can be saved.

Description

Lens module and camera equipment with same

Technical Field

The invention relates to the technical field of camera equipment, in particular to a lens module and camera equipment with the same.

Background

With the rapid development of multimedia technology, digital cameras, video cameras, tablet computers and mobile phones with cameras are more and more favored by consumers, and in the digital cameras, video cameras, mobile phone cameras and other photographic devices, the lens module is an indispensable component. The lens module generally includes a lens barrel, a lens holder, a lens, a driving device, and an image sensor. The lens is accommodated in the lens barrel, the image sensor is arranged on the lens base, and the driving device adjusts the lens, so that the lens moves relative to the image sensor to realize the focusing or anti-shaking function.

In the conventional focusing or anti-shake lens module, a driving motor or a voice coil motor is used to drive a lens barrel or a lens base to displace, so as to change the distance between a lens and an image sensor, thereby realizing focusing or anti-shake. However, the lens module is not only high in cost, but also needs to reserve a large space for the movement of the lens due to the large size of the lens, so that the size of the lens module is increased, and the requirements of people on the lightness, thinness, shortness and shortness of the camera module or the camera equipment cannot be met. Therefore, it is desirable to provide a focusing or anti-shake lens module with small space occupation.

Disclosure of Invention

The present invention is directed to at least one of the technical problems of the prior art, and therefore, the present invention provides a lens module, which has a small size and a small occupied space, and can satisfy the light, thin, short and small requirements of people for a camera module or a camera device.

The invention also provides a camera device with the lens module.

The lens module according to the embodiment of the first aspect of the invention comprises a lens barrel, a movable part and an electromagnetic driving assembly, wherein an accommodating space is arranged in the lens barrel; the movable part is used for bearing an image sensor, and the part of the movable part for bearing the image sensor is positioned below the accommodating space; the electromagnetic driving assembly comprises a coil and a magnetic body, the electromagnetic driving assembly is arranged below the accommodating space, and the electromagnetic driving assembly generates a Lorentz force or a magnetic force between a magnetic field generated by electrifying the coil and the magnetic body to drive the movable part to move so as to drive the image sensor to move.

The lens module according to the embodiment of the invention at least has the following technical effects: be provided with accommodation space in the lens cone, can be used for placing the lens subassembly, the movable part is used for bearing image sensor to the part that is used for bearing image sensor is located the accommodation space below, makes image sensor can be located the bottom of lens subassembly, thereby drives the movable part through the electromagnetic drive subassembly and removes and to adjust the distance or the position relation realization focusing between image sensor and the lens subassembly or anti-shake. The driving force required by the lens module is smaller and the driving is more convenient by driving the image sensor to move instead of driving the lens assembly to move. Meanwhile, the size of the image sensor is small, so that the space reserved for the image sensor by the lens module is small, and the thickness of the lens module in the axial direction can be saved.

According to some embodiments of the present invention, the coil is disposed on the movable portion, and the two magnetic bodies are disposed and respectively fixedly disposed at both sides of the coil.

According to some embodiments of the invention, the faces of the magnetic bodies on both sides of the coil facing the coil are one of positive magnetic poles and the other of negative magnetic poles.

According to some embodiments of the invention, the coil is fixedly disposed below the movable portion, and the magnetic body is connected to the bottom of the movable portion and located above the coil.

According to some embodiments of the invention, a face of the magnetic body facing the coil is a negative magnetic pole or a positive magnetic pole.

According to some embodiments of the present invention, the movable portion includes a bearing plate located at the bottom of the accommodating space, the bearing plate is used for bearing the image sensor, and the electromagnetic driving assembly drives the bearing plate to move so as to drive the image sensor to move.

According to some embodiments of the present invention, the lens module further includes a fixed plate, the movable portion further includes a side plate, the fixed plate and the side plate are disposed on a side surface of the movable portion and are disposed opposite to each other, and the movable portion moves relative to the fixed plate through the side plate.

According to some embodiments of the present invention, the side plates and the fixing plate are provided with sliding grooves which are oppositely arranged, the sliding grooves are enclosed to form a sliding way, and the sliding way is provided with balls and/or rollers.

According to some embodiments of the invention, the side plate and the fixing plate are embedded with magnetic members, and the side plate and the fixing plate are abutted by magnetic force of the magnetic members.

An image pickup apparatus according to an embodiment of a second aspect of the present invention includes the lens module according to the above-described embodiment of the first aspect of the present invention.

According to the image pickup apparatus of the embodiment of the present invention, at least the following technical effects are obtained: by adopting the lens module, the size of the lens module is reduced, the occupied space is small, and the requirements of people on the lightness, thinness, shortness and smallness of the camera module or the camera equipment can be met.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above-mentioned additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of an overall structure of a lens module according to an embodiment of the invention;

FIG. 2 is a schematic view of a combination structure of a lens module fixing plate and a movable portion according to an embodiment of the present invention;

FIG. 3 is a schematic view of a first driving method of a lens module according to an embodiment of the invention;

FIG. 4 is a schematic bottom view of a first driving method of a lens module according to an embodiment of the invention;

fig. 5 is a structural diagram of a second driving method of the lens module according to the embodiment of the invention.

Reference numerals:

the lens barrel 100, the movable portion 200, the carrier plate 210, the side plate 220, the sliding groove 221, the ball 230, the coil 310, the magnetic body 320, the hall sensor 321, the fixed plate 400, the magnetic member 410, the flexible circuit board 500, and the housing 600.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

A lens module according to an embodiment of the present invention is described below with reference to fig. 1 to 5.

For example, as shown in fig. 2 and fig. 3, a lens module according to an embodiment of the first aspect of the present invention includes a lens barrel 100, a movable portion 200, and an electromagnetic driving assembly, wherein an accommodating space is provided in the lens barrel 100; the movable part 200 is used for bearing the image sensor, and the part of the movable part 200 for bearing the image sensor is positioned below the accommodating space; the electromagnetic driving assembly comprises a coil 310 and a magnetic body 320, the electromagnetic driving assembly is arranged below the accommodating space, and the electromagnetic driving assembly drives the movable portion 200 to move by generating a lorentz force or a magnetic force between a magnetic field generated by electrifying the coil and the magnetic body so as to drive the image sensor to move.

For example, as shown in fig. 2 and 3, a lens module according to an embodiment of the first aspect of the present invention includes a lens barrel 100, a movable portion 200, and an electromagnetic driving component, wherein an accommodating space is provided in the lens barrel 100, and the accommodating space is used for accommodating the lens component. The movable portion 200 is used for bearing an image sensor, and a portion bearing the image sensor is located below the accommodating space, and the image sensor is located below the accommodating space, i.e. can receive an image signal transmitted by the lens. The electromagnetic driving assembly is located at the bottom of the accommodating space, the electromagnetic assembly comprises a coil 310 and a magnetic body 320, one of the coil 310 and the magnetic body 320 is connected with the movable part 200, the other is fixedly arranged, through electrifying the coil 310, Lorentz force or mutual attraction or repulsion of magnetic force is generated between the coil 310 and the magnetic body 320, so that mutual displacement occurs between the coil 310 and the magnetic body 320, the movable part 200 can move upwards or downwards by changing the direction of current in the coil 310, and the image sensor is close to or far away from the lens assembly, so that focusing is realized.

According to the lens module provided by the embodiment of the invention, at least the following beneficial effects can be achieved by the arrangement: the lens barrel 100 is provided with an accommodating space for accommodating a lens assembly, the movable portion 200 is used for bearing an image sensor, and a portion of the movable portion 200 for bearing the image sensor is located below the accommodating space, so that the image sensor can be located at the bottom of the lens assembly, and the movable portion 200 is driven by the electromagnetic driving assembly to move, so that the distance or the position relationship between the image sensor and the lens assembly can be adjusted, and focusing or anti-shake is achieved. The driving force required by the lens module is smaller and the driving is more convenient by driving the image sensor to move instead of driving the lens assembly to move. Meanwhile, the size of the image sensor is small, so that the space reserved for the image sensor by the lens module is small, the thickness of the lens module in the axial direction can be saved, the size of the lens module is small, the occupied space is small, and the requirements of people on the lightness, thinness, shortness and smallness of a camera module or a camera device can be met.

In some embodiments of the present invention, the coil 310 is disposed on the movable portion 200, and two magnetic bodies 320 are disposed and respectively fixedly disposed at two sides of the coil 310.

For example, as shown in fig. 5, the coil 310 is disposed on the movable portion 200 and fixedly connected to the movable portion 200, two magnetic bodies 320 are disposed on two sides of the coil 310, and a magnetic induction line generated by the magnetic bodies 320 passes through the coil 310, so that a lorentz force is generated between the coil 310 and the magnetic bodies 320 to drive the movable portion 200 to move up and down, and the image sensor is close to or far from the lens assembly, thereby achieving the lens focusing effect. By disposing the magnetic bodies 320 on both sides of the coil 310, the space on both sides of the coil 310 can be used to reduce the thickness in the optical axis direction, thereby reducing the volume of the mirror module in the optical axis direction.

In some embodiments of the present invention, the surfaces of the magnetic bodies 320 facing the coil 310 on both sides of the coil 310 are a positive magnetic pole and a negative magnetic pole.

By arranging the magnetic bodies 320 located at both sides of the coil 310 such that one is a positive magnetic pole and the other is a negative magnetic pole facing the coil 310, it is ensured that the magnetic induction lines generated by the two magnetic bodies 320 can pass through the coil 310 to generate the lorentz force of interaction, and at the same time, the magnetic bodies 320 have a certain length in the vertical direction to ensure that the magnetic induction lines always pass through the coil 310 when the coil 310 moves up and down following the movable portion 200.

In some embodiments of the present invention, the coil 310 is fixedly disposed below the movable portion 200, and the magnetic body 320 is connected to the bottom of the movable portion 200 and is disposed above the coil 310.

For example, as shown in fig. 3 and 4, the coil 310 is fixedly disposed below the movable portion 200, the magnetic body 320 is connected to the bottom of the movable portion 200 and is disposed above the coil 310, when the coil 310 is energized, the coil 310 generates magnetism, and the magnetism generated by the coil 310 and the magnetism of the magnetic body 320 attract or repel each other, so that the image sensor is far away from or close to the lens assembly, thereby adjusting the distance between the image sensor and the lens assembly to achieve focusing. Meanwhile, the magnetic body 320 has a lighter weight than the coil 310, and the magnetic body 320 is more easily connected to the movable part 200 to be driven.

In some embodiments of the present invention, the surface of the magnetic body 320 facing the coil 310 has a negative or positive magnetic pole.

The whole surface of the magnetic body 320 facing the coil 310 is a negative magnetic pole or a positive magnetic pole, so that the magnetism generated by the energization of the coil 310 can attract or repel the bottom surface of the magnetic body 320, thereby generating a force to drive the movable part 200 to move up and down, adjusting the distance between the image sensor and the lens assembly, and achieving the focusing effect.

In some embodiments of the present invention, the movable portion 200 includes a supporting plate 210, the supporting plate 210 is located at the bottom of the accommodating space, the supporting plate 210 is used for supporting the image sensor, and the electromagnetic driving component drives the supporting plate 210 to move so as to drive the image sensor to move.

For example, as shown in fig. 3 and 4, the movable portion 200 includes a bearing plate 210, the bearing plate 210 is located at the bottom of the accommodating space, the bearing plate 210 is used for bearing the image sensor, and the electromagnetic driving component drives the bearing plate 210 to move, so as to drive the image sensor to move.

In some embodiments of the present invention, the lens module further includes a fixing plate 400, the movable portion 200 further includes a side plate 220, the fixing plate 400 and the side plate 220 are disposed on a side surface of the movable portion 200, the fixing plate 400 and the side plate 220 are disposed opposite to each other, and the movable portion 200 moves relative to the fixing plate 400 through the side plate 220.

For example, as shown in fig. 2 and 3, the lens module further includes a fixing plate 400, the fixing plate 400 frames the movable portion 200 and the lens barrel 100 in a frame shape, the fixing plate 400 is disposed opposite to the side plate 220, the movable portion 200 moves relative to the fixing plate 400 through the side plate 220, and when the electromagnetic driving assembly drives the movable portion 200 to move, the side plate 220 of the movable portion 200 abuts against the fixing plate 400 so that the movable portion 200 can move upward or downward along the fixing plate 400 through the side plate 220.

In some embodiments of the present invention, the side plates 220 and the fixing plate 400 are provided with opposite sliding grooves 221, the sliding grooves 221 enclose to form a sliding channel, and the sliding channel is provided with balls and/or rollers 230

For example, as shown in fig. 2 and 3, the side plate 220 and the fixing plate 400 are provided with sliding grooves 221 which are oppositely arranged, the sliding grooves 221 are enclosed to form a sliding way, and balls and/or rollers 230 are arranged in the sliding way, so that the mutual movement between the movable part 200 and the fixing plate 400 is changed from static friction to dynamic friction, the friction force can be effectively reduced, the movable part 200 is easier to drive and is less prone to wear, and the service life and the precision are increased. And the arrangement of the slide way, the balls and the rollers 230 provides a guide for the movement of the movable part 200, which limits the direction of the movement of the movable part 200, so that the movement of the movable part 200 can be more accurately and easily controlled.

More closely, can also set up the baffle on the lens module, the baffle setting prevents ball or roller 230 from following the slide roll-off in the slide, and the baffle can carry out certain limiting action to the removal of movable part 200 simultaneously, prevents that the displacement of movable part 200 is too big, plays certain limiting displacement.

In some embodiments of the present invention, magnetic members 410 are embedded in the side plates 220 and the fixing plates 400, and the side plates 220 and the fixing plates 400 are abutted by the magnetic force of the magnetic members 410. The magnetic members 410 are embedded in the side plates 220 and the fixing plate 400, the side plates 220 and the fixing plate 400 can be abutted against each other by the magnetic force of the magnetic members 410, and the side plates 220 and the side walls of the lens barrel 100 can move relative to each other by balls, rollers 230 or bearings. The side plate 220 is tightly attached to the side wall of the lens barrel 100 by the magnetic force of the magnetic member 410, and the driving assembly is mounted on the outer side wall of the lens barrel 100, so that the driving assembly can conveniently drive the movable portion 200.

Further, the lens module further includes a hall sensor 321, for example, as shown in fig. 4, the hall sensor 321 is disposed on the magnetic body 320, and the hall sensor 321 is used for sensing the position relationship between the coil 310 and the magnetic body 320. The hall sensor 321 can detect the change of the magnetic flux on the coil 310, so as to sense the position relationship between the coil 310 and the magnetic body 320, and facilitate the control of the lens module on the position of the movable part 200.

Further, the lens module further includes a flexible circuit board 500, for example, as shown in fig. 2, fig. 3 and fig. 4, one end of the flexible circuit board 500 is connected to the image sensor, and the other end of the flexible circuit board 500 is used for being connected to a motherboard of the image pickup device, and the image sensor receives the image signal transmitted by the lens assembly, converts the image signal into an electrical signal, and transmits the electrical signal to the motherboard of the image pickup device through the flexible circuit board 500. The position that flexible circuit board 500 is connected with the lens module is the crooked setting of S type for the part that flexible circuit board 500 and image sensor are connected can be followed image sensor and moved together when electromagnetic drive assembly drive movable part 200 reciprocated, and certain length can be reserved for flexible circuit board 500 'S removal to the part that flexible circuit board 500 is the crooked of S type, from not influencing the relation of being connected with camera equipment' S mainboard.

Further, the lens module further includes a housing 600, for example, as shown in fig. 1, the housing 600 frames the fixing plate 400, the movable portion 200, the lens barrel 100, and other components therein.

According to the camera equipment provided by the embodiment of the invention, the volume of the camera equipment is reduced by adopting the lens module, the occupied space is small, and the requirements of people on the lightness, thinness, shortness and smallness of the camera module or the camera equipment can be met.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lens module, comprising:

a lens barrel (100), wherein an accommodating space is arranged in the lens barrel (100);

a movable part (200), wherein the movable part (200) is used for bearing an image sensor, and the part of the movable part (200) for bearing the image sensor is positioned below the accommodating space;

the electromagnetic driving assembly comprises a coil (310) and a magnetic body (320), the electromagnetic driving assembly is arranged below the accommodating space, and the electromagnetic driving assembly generates a magnetic field through energization of the coil (310) and generates a Lorentz force or a magnetic force between the magnetic body (320) to drive the movable part (200) to move so as to drive the image sensor to move.

2. The lens module as claimed in claim 1, wherein the coil (310) is disposed on the movable portion (200), and two of the magnetic bodies (320) are disposed and respectively fixedly disposed on two sides of the coil (310).

3. The lens module as claimed in claim 2, wherein the faces of the magnetic bodies (320) on both sides of the coil (310) facing the coil (310) are a positive magnetic pole and a negative magnetic pole.

4. The lens module as claimed in claim 1, wherein the coil (310) is fixedly disposed below the movable portion (200), and the magnetic body (320) is connected to a bottom of the movable portion (200) and is disposed above the coil (310).

5. The lens module as claimed in claim 4, wherein the surface of the magnetic body (320) facing the coil (310) is a negative or positive magnetic pole.

6. The lens module as claimed in claim 1, wherein the movable portion (200) includes a bearing plate (210), the bearing plate (210) is located at the bottom of the accommodating space, the bearing plate (210) is used for bearing the image sensor, and the electromagnetic driving component drives the bearing plate (210) to move so as to drive the image sensor to move.

7. The lens module as claimed in claim 6, further comprising a fixing plate (400), wherein the movable portion (200) further comprises a side plate (220), the fixing plate (400) and the side plate (220) are disposed on a side surface of the movable portion (200), the fixing plate (400) and the side plate (220) are disposed opposite to each other, and the movable portion (200) moves relative to the fixing plate (400) through the side plate (220).

8. The lens module as claimed in claim 7, wherein the side plate (220) and the fixing plate (400) are provided with opposite sliding grooves (221), the sliding grooves (221) enclose to form a slideway, and the slideway is provided with balls and/or rollers (230).

9. The lens module as claimed in claim 6, wherein a magnetic member (410) is embedded in the side plate (220) and the fixing plate (400), and the side plate (220) and the fixing plate (400) are abutted by a magnetic force of the magnetic member (410).

10. An image pickup apparatus characterized by comprising the lens module according to any one of claims 1 to 9.