CN215181146U - Drive module, camera device and electronic equipment - Google Patents

Abstract

The utility model discloses a drive module, a camera device and an electronic device, which relates to the technical field of optical devices, wherein the drive module comprises an induction coil and a magnetic piece, one of the induction coil and the magnetic piece is arranged on the peripheral surface of a carrier, the other one is arranged on the inner side surface of a shell, and the induction coil and the magnetic piece are mutually induced; the induction coil comprises a first straight part, a second straight part, a first arc part and a second arc part, wherein the first arc part and the second arc part are respectively connected between the end parts of the first straight part and the second straight part; the magnetic part comprises a first magnetic part and a second magnetic part, one of the first magnetic part and the second magnetic part is parallel to the first straight part and is arranged at an interval, and the other of the first magnetic part and the second magnetic part is parallel to the second straight part and is arranged at an interval. The utility model discloses can solve the interval between induction coil and the magnetic part among the prior art and increase gradually to both sides by the nearly tangent position of induction coil and magnetic part, the technique that has reduced the utilization ratio is not enough.

Description

Drive module, camera device and electronic equipment

Technical Field

The utility model relates to an optical equipment technical field, concretely relates to drive module, camera device and electronic equipment.

Background

In the prior art, a Voice Coil Motor (VCM) is widely used to complete an auto-focus function of photographing, and the VCM can adjust a position of a lens to present a clear image. The voice coil motor has the characteristics of high frequency response and high precision. The main principle is that in a permanent magnetic field, the direct current of a coil in a motor is changed to drive a carrier and a lens fixed on the carrier to move axially, so that the focusing function is realized.

As shown in fig. 1, the induction coil 10 is wound around the periphery of the carrier 30 and four magnetic members 20 enclosing a rectangular space, the induction coil 10 is disposed in the rectangular space, for convenience of winding, the induction coil 10 is substantially circular, and the distance between the induction coil 20 and the magnetic members 20 gradually increases from the near-tangent position of the induction coil and the magnetic members to both sides, which will result in less magnetic flux in the region with a larger distance between the induction coil and the magnetic members, i.e. the distance between the B1 and the B2 region is greater than the distance between the a region, thereby reducing the utilization rate of the induction coil and the magnetic members.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a drive module, a camera device and an electronic apparatus, which are less in the problem of the large area magnetic flux between the induction coil and the magnetic member in the prior art, and are less in the technical shortage of the utilization rate of the induction coil and the magnetic member.

On one hand, the utility model provides a driving module, which comprises a shell and a carrier arranged in the shell and used for mounting a lens;

the driving module further comprises an induction coil and a magnetic piece, one of the induction coil and the magnetic piece is arranged on the peripheral surface of the carrier, the other one of the induction coil and the magnetic piece is arranged on the inner side surface of the shell, and the induction coil and the magnetic piece are mutually induced;

wherein at least parts of two opposite sides of the induction coil respectively correspond to the magnetic members on two sides to be mutually excited.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses shown drive module, induction coil set to straight form portion and arcuation portion respectively, and the magnetic part sets up with the parallel interval of straight form portion respectively, and induction coil does not have the interval with the region that the magnetic part corresponds and changes, can effectively guarantee that the magnetic field is intensive, has effectively promoted the utilization ratio between induction coil and the magnetic part.

According to one aspect of the above technical solution, the induction coil includes a first straight portion, a second straight portion, a first arc portion and a second arc portion, the first arc portion and the second arc portion are respectively connected between ends of the first straight portion and the second straight portion;

the magnetic part comprises a first magnetic part and a second magnetic part, one of the first magnetic part and the second magnetic part is parallel to and spaced from the first straight part, and the other of the first magnetic part and the second magnetic part is parallel to and spaced from the second straight part.

According to an aspect of the foregoing technical solution, the induction coil is wound on a peripheral surface of the carrier, and the first magnetic member and the second magnetic member are correspondingly disposed on an inner side surface of the housing.

According to an aspect of the above technical solution, the first magnetic member and the first straight portion are mutually inductive, the first magnetic member is disposed outside the first straight portion, the second magnetic member and the second straight portion are mutually inductive, and the second magnetic member is disposed outside the second straight portion.

According to an aspect of the present invention, the first straight portion and the second straight portion have the same length, and the first arc portion and the second straight portion have the same length and arc degree.

According to an aspect of the present invention, the first straight portion and the second straight portion have a length greater than a length of the first arc portion and the second straight portion.

According to an aspect of the above technical solution, a ratio of the length of the first straight portion to the length of the first arc portion is 1:0.7 to 1: 0.9.

According to one aspect of the above technical solution, the outer peripheral surface of the carrier is provided with a receiving groove for receiving the induction coil.

On the other hand, the utility model also provides a camera device, which comprises a lens, an imaging sensor and the driving module in the technical proposal;

the lens is arranged on the carrier and can axially move under the driving of the carrier, the imaging sensor is arranged on one side of the shell, which is far away from the lens, and the imaging sensor and the lens are oppositely arranged on an optical axis path.

On the other hand, the utility model also provides an electronic equipment, electronic equipment includes among the above-mentioned technical scheme camera device.

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 and/or 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 a prior art electromagnetic assembly;

fig. 2 is a schematic structural diagram of a driving module according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a magnetic member and an induction coil in a driving module according to a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of an induction coil according to a first embodiment of the present invention;

the figure elements are illustrated in symbols:

the magnetic induction type electromagnetic induction device comprises a shell 10, a cover 11, a base 12, a carrier 20, a first magnetic part 31, a second magnetic part 32, an induction coil 40, a first straight part 41, a second straight part 42, a first arc-shaped part 43 and a second arc-shaped part 44.

Detailed Description

In order to make the objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for illustrative purposes only and do not indicate or imply that the referenced device or element must be in a particular orientation, constructed and operated, and should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, which is a schematic view of an electromagnetic assembly in the prior art, wherein the driving module includes an induction coil 10 wound around a periphery of a carrier 30 and four magnetic members 20 enclosing a rectangular space, the induction coil 10 is disposed in the rectangular space, for convenience of winding, the induction coil 10 is substantially circular, and a distance between the induction coil 20 and the magnetic members 20 gradually increases from a near-tangent position of the induction coil and the magnetic members to two sides, which will result in a smaller magnetic flux in an area where the distance between the induction coil and the magnetic members is larger, that is, the distance between the B1 and the B2 area is larger than the distance between the a area, thereby reducing utilization rates of the induction coil and the magnetic members.

Referring to fig. 2-4, a driving module according to a first embodiment of the present invention is shown, in a three-dimensional XYZ rectangular coordinate system, the driving module includes a housing 10 and a carrier 20 disposed in the housing 10 for mounting a lens, it should be understood that the housing 10 shown in this embodiment refers to a base 12 and a cover 11 in the prior art, the base 12 and the cover 11 enclose to form the housing 10, and the carrier 20 is movably disposed inside the housing 10 and moves along an axial direction (Z-axis direction) of the housing 10 under the driving of the driving module to achieve focusing.

The driving module further includes an induction coil 40 and a magnetic member, one of the induction coil 40 and the magnetic member is disposed on the peripheral surface of the carrier 20, the other is disposed on the inner side surface of the housing 10, and the induction coil 40 and the magnetic member mutually induce.

In a preferred embodiment, the driving module is shown as a moving coil type, i.e. the induction coil 40 is wound on the outer surface of the carrier 20, and the magnetic element is arranged on the inner surface of the cover 11; when the induction coil 40 is energized, since the induction coil 40 is wound on the outer surface of the movable carrier 20, and the magnetic member is stationary relative to the driving module as a whole, the induction coil 40 will drive the carrier 20 to move axially inside the housing 10 to achieve optical focusing.

In another embodiment, the driving module is designed as a moving-iron type, that is, the magnetic element is disposed on the outer periphery of the carrier 20, the induction coil 40 is disposed on the inner surface of the cover 11 in a surrounding manner, and similarly, when the induction coil 40 is energized, a lorentz force is generated between the induction coil 40 and the magnetic element, since the magnetic element is disposed on the outer surface of the movable carrier 20 and the induction coil 40 is stationary with respect to the optical driving motor as a whole, the magnetic element will drive the carrier 20 to move axially inside the housing 10 to achieve optical focusing.

In order to avoid the problem that the distance between the induction coil and the magnetic part in the prior art gradually increases from the nearly tangent position of the induction coil and the magnetic part to two sides. At least parts of two opposite sides of the induction coil respectively correspond to the magnetic parts on two sides so as to be mutually excited, namely the other two sides of the induction coil are not mutually excited with the magnetic parts. As shown in fig. 4, in the present embodiment, the induction coil 40 includes a first straight portion 41, a second straight portion 42, a first arc portion 43 and a second arc portion 44, the first arc portion 43 and the second arc portion 44 are respectively connected between the ends of the first straight portion 41 and the second straight portion 42, and the induction coil 40 is disposed in a racetrack shape as a whole. The magnetic member for mutually energizing the induction coil 40 includes a first magnetic member 31 and a second magnetic member 32, one of the first magnetic member 31 and the second magnetic member 32 is parallel to and spaced apart from the first straight portion 41, and the other is parallel to and spaced apart from the second straight portion 42. That is, in the driving module shown in the present embodiment, only the first straight portion 41 and the second straight portion 42 of the induction coil 40 and the first magnetic element 31 and the second magnetic element 32 are mutually excited to generate the lorentz force.

In the driving module shown in this embodiment, the induction coil is respectively arranged into the straight portion and the arc portion, the magnetic member is respectively arranged in parallel with the straight portion at an interval, and the area where the induction coil corresponds to the magnetic member has no interval change, so that the magnetic field is effectively ensured to be dense, and the utilization rate between the induction coil and the magnetic member is effectively improved.

For convenience of illustration, in the present embodiment, the magnetic member corresponding to the first magnetic member 31 is the first magnetic member 31, and the magnetic member corresponding to the second magnetic member 32 is the second magnetic member 32. The first magnetic member 31 and the first straight portion 41 are mutually inductive, the first magnetic member 31 is disposed outside the first straight portion 41, the second magnetic member 32 and the second straight portion 42 are mutually inductive, and the second magnetic member 32 is disposed outside the second straight portion 42. The first magnetic element 31 and the second magnetic element 32 are respectively disposed outside the induction coil 40, and meet the above-mentioned moving coil design requirement.

It should be understood by those skilled in the art that the descriptions of the technical terms "first" and "second" in the present embodiment are only used for distinguishing one from another, and are not specifically referred to for illustration.

In this embodiment, the first straight portion 41 and the second straight portion 42 have the same length, and the first arc portion 43 and the second straight portion 42 have the same length and arc degree. In order to increase the area of the induction coil 40 that can interact with the magnetic member as much as possible, the lengths of the first straight portion 41 and the second straight portion 42 are longer than the lengths of the first arc portion 43 and the second straight portion 42.

Specifically, the ratio of the length of the first straight portion 41 to the length of the first arc portion 43 is 1:0.85, and similarly, the ratio of the length of the second straight portion 42 to the length of the second arc portion 44 is 1: 0.85. In other alternative embodiments, the ratio of the length of the first straight portion 41 to the length of the first arc portion 43 is 1:0.9-1:0.7, and similarly, the ratio of the length of the second straight portion 42 to the length of the second arc portion 44 is 1:0.9-1: 0.7. the length ratio of the straight part to the arc part is in a reasonable range, which not only can ensure that the induction coil 40 and the magnetic part can generate enough thrust to drive the carrier 20 and the lens, but also can ensure that the shape of the induction coil 40 basically corresponds to the shapes of the carrier 20 and the shell 10, and is convenient for assembly.

In this embodiment, the peripheral surface of the carrier 20 is provided with a receiving groove (not shown) for receiving the induction coil 40, and the induction coil 40 is wound in the receiving groove, so that the connection strength between the induction coil 40 and the carrier 20 can be ensured, and the induction coil 40 is prevented from being separated from the carrier 20 along the axial direction.

A second embodiment of the present invention provides a camera device, which includes a lens, an imaging sensor, and the driving module of the first embodiment;

the lens is arranged on the carrier and can axially move under the driving of the carrier, the imaging sensor is arranged on one side of the shell, which is far away from the lens, and the imaging sensor and the lens are oppositely arranged on an optical axis path.

A third embodiment of the present invention provides an electronic device, which includes the camera device described in the second embodiment, and the electronic device is an intelligent terminal with a shooting function, such as a smart phone, a tablet computer, and the like.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a drive module, drive module includes the casing and locates be used for installing the carrier of camera lens in the casing, its characterized in that:

the driving module further comprises an induction coil and a magnetic piece, one of the induction coil and the magnetic piece is arranged on the peripheral surface of the carrier, the other one of the induction coil and the magnetic piece is arranged on the inner side surface of the shell, and the induction coil and the magnetic piece are mutually induced;

wherein at least parts of two opposite sides of the induction coil respectively correspond to the magnetic members on two sides to be mutually excited.

2. The drive module of claim 1, wherein:

the induction coil comprises a first straight part, a second straight part, a first arc part and a second arc part, wherein the first arc part and the second arc part are respectively connected between the end parts of the first straight part and the second straight part;

the magnetic part comprises a first magnetic part and a second magnetic part, one of the first magnetic part and the second magnetic part is parallel to and spaced from the first straight part, and the other of the first magnetic part and the second magnetic part is parallel to and spaced from the second straight part.

3. The drive module of claim 2, wherein: the induction coil is wound on the peripheral surface of the carrier, and the first magnetic part and the second magnetic part are correspondingly arranged on the inner side surface of the shell.

4. The drive module of claim 3, wherein: the first magnetic part and the first straight part are mutually induced, the first magnetic part is arranged on the outer side of the first straight part, the second magnetic part and the second straight part are mutually induced, and the second magnetic part is arranged on the outer side of the second straight part.

5. The drive module of claim 2, wherein: the first straight portion and the second straight portion have the same length, and the first arc portion and the second straight portion have the same length and arc.

6. The drive module of claim 5, wherein: the lengths of the first straight portion and the second straight portion are greater than the lengths of the first arc portion and the second straight portion.

7. The drive module of claim 6, wherein: the ratio of the length of the first straight part to the length of the first arc part is 1: 0.7-1: 0.9.

8. The drive module of any of claims 1-7, wherein: and the peripheral surface of the carrier is provided with a containing groove for containing the induction coil.

9. A camera device, comprising a lens, an imaging sensor, and the driving module of any one of claims 1-8;

the lens is arranged on the carrier and can axially move under the driving of the carrier, the imaging sensor is arranged on one side of the shell, which is far away from the lens, and the imaging sensor and the lens are oppositely arranged on an optical axis path.

10. An electronic apparatus characterized by comprising the image pickup device according to claim 9.

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