阅读说明：本技术 驱动装置、相机模组、电子设备及驱动装置组装方法 (Driving device, camera module, electronic device and driving device assembling method ) 是由 孙伟 周聚鹤 于 2019-03-19 设计创作，主要内容包括：本发明提供一种驱动装置、相机模组、电子设备及驱动装置组装方法,该驱动装置包括底座、下弹簧、镜头组件、上弹簧、线圈和磁体,底座包括端子,下弹簧弹性设于底座与镜头组件之间,镜头组件可相对底座移动地设于底座上,上弹簧设于镜头组件上,端子的一端从底座底部露出,另一端朝上弹簧延伸至与上弹簧电性连接,上弹簧还与线圈电性连接,线圈设于镜头组件上,磁体与线圈对应设置。本发明的驱动装置、相机模组、电子设备和驱动装置组装方法中,通过上弹簧实现电连接,端子与上弹簧的连接过程可在镜头组件的上部作业,操作空间较大,操作方便,且可依次将下弹簧、镜头组件设于底座上方,所有部件无需翻转,操作更为方便,组装流程也更为简化。(The invention provides a driving device, a camera module, electronic equipment and a driving device assembling method, wherein the driving device comprises a base, a lower spring, a lens component, an upper spring, a coil and a magnet, the base comprises a terminal, the lower spring is elastically arranged between the base and the lens component, the lens component is movably arranged on the base relative to the base, the upper spring is arranged on the lens component, one end of the terminal is exposed out of the bottom of the base, the other end of the terminal is upwards extended to be electrically connected with the upper spring, the upper spring is also electrically connected with the coil, the coil is arranged on the lens component, and the magnet is arranged corresponding to the coil. In the driving device, the camera module, the electronic equipment and the assembling method of the driving device, the electric connection is realized through the upper spring, the connection process of the terminal and the upper spring can work on the upper part of the lens assembly, the operation space is large, the operation is convenient, the lower spring and the lens assembly can be arranged above the base in sequence, all components do not need to be turned over, the operation is more convenient, and the assembling process is simplified.)

1. A driving device is characterized by comprising a base (10), a lower spring (12), a lens assembly (14), an upper spring (16), a coil (18) and a magnet (20), the base (10) comprises a terminal (102), the lower spring (12) is elastically arranged between the base (10) and the lens component (14), the lens component (14) is movably arranged on the base (10) relative to the base (10), the upper spring (16) is arranged on the lens assembly (14), one end of the terminal (102) is exposed out of the bottom of the base (10), the other end of the terminal extends towards the upper spring (16) to be electrically connected with the upper spring (16), the upper spring (16) is also electrically connected with the coil (18), the coil (18) is arranged on the lens component (14), and the magnet (20) is arranged corresponding to the coil (18).

2. The drive arrangement of claim 1, wherein the lens assembly (14) includes a carrier (142) and a lens (144) secured to the carrier (142), the carrier (142) and the lens (144) being of unitary construction.

3. The drive device according to claim 1, wherein there are two coils (18), and two coils (18) are respectively disposed on two opposite sides of the lens assembly (14).

4. The drive device according to claim 3, wherein the number of the magnets (20) is two, and two magnets (20) are respectively provided on two opposite sides of the lens assembly (14) and respectively provided corresponding to the two coils (18).

5. The driving apparatus as claimed in claim 4, wherein the upper spring (16) comprises a first upper spring portion (162) and two second upper spring portions (164), one end of each of the first upper spring portion (162) and the second upper spring portion (164) is fixedly connected to the base (10), the other end of each of the first upper spring portion and the second upper spring portion (164) is fixedly connected to the lens assembly (14), the two second upper spring portions (164) are electrically connected to the two terminals (102), one end of each of the two coils (18) is electrically connected to the two second upper spring portions (164), and the other end of each of the two coils (18) is electrically connected to the first upper spring portion (162).

6. The driving device according to claim 2, wherein the base (10) further comprises a base (104), the terminal (102) is embedded in the base (104), the base (10) is provided with a first protruding column (106), and the base (10) is further provided with a second protruding column (108); a first clamping hole 122 is formed in the lower spring (12), and the first convex column (106) is clamped in the first clamping hole 122; be equipped with third projection (146) on carrier (142), go up spring (16) and include second inner circle, second connection deformation portion and second outer lane, the second connect deformation portion connect in the second inner circle with between the second outer lane, be equipped with second card hole (166) on the second outer lane, the second inner circle is equipped with third card hole (168), second projection (108) card is gone into in second card hole (166), third projection (146) card is gone into in third card hole (168).

7. The driving apparatus according to claim 2, further comprising a housing (22), wherein the housing (22) is covered on the base (10), the lower spring (12), the lens assembly (14), the upper spring (16), the coil (18) and the magnet (20) are all covered in the housing (22), and the terminal (102) is electrically connected to the upper spring (16) through a gap between the lens assembly (14) and the housing (22).

8. A camera module comprising the driving device of any one of claims 1 to 7.

9. An electronic device comprising the camera module of claim 8.

10. A method of assembling a drive device, comprising the steps of:

providing a base (10), the base (10) comprising a terminal (102);

providing a lower spring (12), arranging the lower spring (12) on the base (10), and fixing one end of the lower spring (12) on the base (10);

providing a lens assembly (14) and a coil (18), arranging the coil (18) on the lens assembly (14), arranging the lens assembly (14) on the base (10), and connecting the other end of the lower spring (12) to the lens assembly (14);

providing an upper spring (16), arranging the upper spring (16) on the lens assembly (14), wherein the upper spring (16) is respectively electrically connected with the terminal (102) and the coil (18);

providing a magnet (20) and a shell (22), arranging the magnet (20) in the shell (22), buckling the shell (22) above the lens assembly (14), enabling the upper spring (16) to be located between the lens assembly (14) and the shell (22), and enabling the magnet (20) and the coil (18) to be correspondingly arranged.

Technical Field

The present invention relates to the field of imaging technologies, and in particular, to a driving device, a camera module, an electronic apparatus, and a driving device assembling method.

Background

With the progress of science and technology, the application of camera modules is more and more extensive, and at present, except cameras, mobile phones, computers and other electronic equipment are equipped with camera modules, so that people can take pictures at any time and any place conveniently, and convenience and fun are brought to the life of people. The camera module comprises a fixed-focus camera module and a zooming camera module, and in the zooming camera module, the lens can be driven to move through the driving device, so that focusing is realized.

The driving device generally comprises a base, a lower spring, a carrier, an upper spring, a magnet, a coil and a shell, wherein the lower spring is arranged on the base, the carrier is arranged on the base and positioned between the upper spring and the lower spring, and the coil is electrically connected with a circuit board below the driving device through the lower spring to realize electric conduction. When the coil is electrified, the coil generates a force for driving the carrier to move up and down under the magnetic force action of the magnet, so that the lens mounted on the carrier is driven to move up and down, and focusing is realized. When the driving device is assembled, a lower spring, a carrier and a coil are generally assembled into a rotor part, then the rotor part is assembled on a base, and finally the assembled part is integrally connected with a shell with a magnet and an upper spring arranged inside.

However, in the above driving device, the lower spring is electrically connected to the circuit board, and the lower spring is assembled with the carrier and the coil and then electrically connected to the base, so that the operation space is small during connection and the operation is inconvenient.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

The invention aims to provide a driving device, a camera module, electronic equipment and a driving device assembling method which have large assembling operation space and are convenient to operate.

The invention provides a driving device which comprises a base, a lower spring, a lens assembly, an upper spring, a coil and a magnet, wherein the base comprises a terminal, the lower spring is elastically arranged between the base and the lens assembly, the lens assembly is movably arranged on the base relative to the base, the upper spring is arranged on the lens assembly, one end of the terminal is exposed out of the bottom of the base, the other end of the terminal extends towards the upper spring to be electrically connected with the upper spring, the upper spring is also electrically connected with the coil, the coil is arranged on the lens assembly, and the magnet is arranged corresponding to the coil.

In one embodiment, the lens assembly includes a carrier and a lens fixed on the carrier, and the carrier and the lens are of an integrated structure.

In one embodiment, the number of the coils is two, and the two coils are respectively arranged on two opposite sides of the lens assembly.

In one embodiment, the number of the magnets is two, and the two magnets are respectively arranged on two opposite sides of the lens assembly and respectively arranged corresponding to the two coils.

In one embodiment, the upper spring includes a first upper spring portion and two second upper spring portions, one end of each of the first upper spring portion and the second upper spring portion is fixedly connected to the base, the other end of each of the first upper spring portion and the second upper spring portion is fixedly connected to the lens assembly, the two second upper spring portions are electrically connected to the two terminals respectively, one end of each of the two coils is electrically connected to the two second upper spring portions respectively, and the other end of each of the two coils is electrically connected to the first upper spring portion respectively.

In one embodiment, the base further includes a base portion, the terminal is embedded in the base portion, the base is provided with a first convex column, and the base is further provided with a second convex column; the lower spring is provided with a first clamping hole, and the first convex column is clamped in the first clamping hole; be equipped with the third projection on the carrier, it includes second inner circle, second connection deformation portion and second outer lane to go up the spring, the second connect deformation portion connect in the second inner circle with between the second outer lane, be equipped with second card hole on the second outer lane, the second inner circle is equipped with the third card hole, the second projection card is gone into in the second card hole, the third projection card is gone into in the third card hole.

In one embodiment, the driving device further includes a housing, the housing is covered on the base, the lower spring, the lens assembly, the upper spring, the coil and the magnet are covered in the housing, and the terminal passes through a gap between the lens assembly and the housing and is electrically connected to the upper spring.

The invention also provides a camera module comprising the driving device.

The invention also provides electronic equipment comprising the camera module.

The invention also provides a driving device assembling method, which comprises the following steps:

providing a base, the base comprising terminals;

providing a lower spring, arranging the lower spring on the base, and fixing one end of the lower spring on the base;

providing a lens assembly and a coil, arranging the coil on the lens assembly, arranging the lens assembly on the base, and connecting the other end of the lower spring to the lens assembly;

providing an upper spring, and arranging the upper spring on the lens assembly, wherein the upper spring is respectively electrically connected with the terminal and the coil;

providing a magnet and a shell, arranging the magnet in the shell, buckling the shell above the lens assembly, enabling the upper spring to be positioned between the lens assembly and the shell, and enabling the magnet and the coil to be correspondingly arranged.

In the driving device, the camera module, the electronic equipment and the assembling method of the driving device, the terminal is electrically connected with the upper spring electrically connected with the coil, and the electric connection is realized through the upper spring, so that the connection process of the terminal and the upper spring can work on the upper part of the lens assembly, the operation space is large, and the operation is convenient. Meanwhile, due to the fact that the upper portion of the lens assembly is operated, the lower spring, the lens assembly and the shell can be sequentially arranged above the base, all components do not need to be turned over, operation is more convenient, and the assembly process is also simplified. In addition, because the operation is carried out on the upper part of the lens assembly, when the upper spring and the terminal are welded together, a protective film can be added, and the lens assembly is prevented from being polluted during welding.

Drawings

Fig. 1 is an exploded perspective view of a driving device according to an embodiment of the present invention.

Fig. 2 is an assembled view of the driving apparatus shown in fig. 1 with a housing removed.

Fig. 3 is a sectional view taken along the line III-III in fig. 2.

Fig. 4 is a flowchart of a driving device assembling method according to an embodiment of the invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 to 3, a driving apparatus according to an embodiment of the present invention includes a base 10, a lower spring 12, a lens assembly 14, an upper spring 16, a coil 18, a magnet 20, and a housing 22. The base 10 includes terminals 102. The lower spring 12 is elastically disposed between the base 10 and the lens assembly 14. The lens assembly 14 is movably disposed on the base 10 relative to the base 10. The upper spring 16 is elastically disposed between the lens assembly 14 and the housing 22, one end of the terminal 102 is exposed from the bottom of the base 10, the other end of the terminal extends toward the upper spring 16 to electrically connect to the upper spring 16, and the upper spring 16 is further electrically connected to the coil 18. The coil 18 is disposed on the lens assembly 14, the magnet 20 is disposed on the housing 22, and the magnet 20 is disposed corresponding to the coil 18.

In the driving device, the terminal 102 is electrically connected to the upper spring 16 electrically connected to the coil 18, and the electrical connection is realized through the upper spring 16, so that the connection process of the terminal 102 and the upper spring 16 can work on the upper part of the lens assembly 14, the operation space is large, and the operation is convenient. Meanwhile, because the upper part of the lens assembly 14 is operated, the lower spring 12, the lens assembly 14 and the shell 22 can be arranged above the base 10 in sequence, all the components do not need to be turned over, the operation is more convenient, and the assembly process is also more simplified. In addition, since the work is performed on the upper portion of the lens module 14, a protective film may be added when the upper spring 16 and the terminal 102 are welded together, thereby preventing the lens module 14 from being contaminated during welding.

In this embodiment, the base 10 further includes a base 104, and the terminal 102 is embedded in the base 104. The base 104 may be injection molded from plastic. The terminal 102 is made of a conductive material, such as metal. Specifically, in the present embodiment, the terminals 102 are two spaced apart from each other. The base 10 is provided with a first convex column 106. The four corners of the base 10 are respectively provided with a corner post 107, and the corner post 107 is provided with a second convex post 108. The terminals 102 are located outside the outside edges of the lens assembly 14.

In this embodiment, the lower spring 12 is a unitary body, and one end of the lower spring is fixedly connected to the base 10, and the other end of the lower spring is fixedly connected to the lens assembly 14, and the lower spring 12 can support the lens assembly 14 and can allow the lens assembly 14 to move relative to the base 10. Specifically, the lower spring 12 includes a first inner ring, a first connection deformation portion, and a first outer ring, the connection deformation portion is deformable and is connected between the first inner ring and the first outer ring, the first outer ring is fixedly connected to the base 10, and the first inner ring is fixedly connected to the lens assembly 14. More specifically, the lower spring 12 is provided with a first locking hole 122, and the first protrusion 106 of the base 10 is locked in the first locking hole 122.

In this embodiment, the lens assembly 14 includes a carrier 142 and a lens 144 fixed to the carrier 142. Specifically, in the embodiment, the carrier 142 and the lens 144 are integrated. It will be appreciated that the carrier 142 and lens 144 may also be a split structure that is assembled together when assembled. When the carrier 142 and the lens 144 are integrally formed, the assembly process can be simplified. Specifically, the carrier 142 is provided with a third protrusion 146.

In this embodiment, the upper spring 16 is fixedly connected to the base 10 at one end and fixedly connected to the lens assembly 14 at the other end to allow the lens assembly 14 to move relative to the base 10. Specifically, the upper spring 16 includes a first upper spring portion 162 and two second upper spring portions 164, and one end of each of the first upper spring portion 162 and the second upper spring portion 164 is fixedly connected to the base 10, and the other end of each of the first upper spring portion 162 and the second upper spring portion 164 is fixedly connected to the lens assembly 14, so as to allow the lens assembly 14 to move relative to the base 10. The two second upper spring portions 164 are electrically connected to the two terminals 102, respectively.

Specifically, the upper spring 16 includes a second inner ring, a second connection deformation portion, and a second outer ring, the second connection deformation portion is deformable and is connected between the second inner ring and the second outer ring, the second outer ring is fixedly connected to the base 10, and the second inner ring is fixedly connected to the lens assembly 14. More specifically, the second outer ring of the upper spring 16 is provided with a second locking hole 166, the second inner ring is provided with a third locking hole 168, the second protrusion 108 of the base 10 is locked into the second locking hole 166, and the third protrusion 146 of the carrier 142 is locked into the third locking hole 168.

In this embodiment, the coil 18 is disposed on the carrier 142. In the present embodiment, the number of the coils 18 is two. One end of each of the two coils 18 is electrically connected to the two second upper spring portions 164, and the other end of each of the two coils 18 is electrically connected to the first upper spring portion 162, so that the two coils 18 are connected in series, and current flows in from one terminal 102, sequentially passes through one second upper spring portion 164, the first upper spring portion 162, the other second upper spring portion 164, and finally flows out through the other terminal 102. It is understood that the number of the coils 18 may be one, and the upper spring 16 may be divided into two parts, and the two parts of the upper spring 16 are electrically connected to two ends of the coils 18 respectively. In addition, three or more coils 18 may be provided, but the connection relationship of the circuits needs to be adjusted correspondingly, which is not described herein again.

Specifically, two coils 18 are provided on two opposite sides of the lens assembly 14, respectively. In this way, the coils 18 are not arranged on the other two sides of the lens assembly 14, so that the external dimensions of the other two sides of the driving device can be reduced, and the driving device is beneficial to miniaturization.

In this embodiment, the number of the magnets 20 is two corresponding to the number of the coils 18, and the two magnets 20 are respectively disposed on two opposite sides of the lens assembly 14 and respectively corresponding to the two coils 18. Similarly, the magnets 20 are not arranged on the other two sides of the lens assembly 14, so that the external dimensions of the other two sides of the driving device can be reduced, and the miniaturization of the driving device is facilitated.

In this embodiment, the housing 22 is disposed on the base 10, and the lower spring 12, the lens assembly 14, the upper spring 16, the coil 18 and the magnet 20 are disposed in the housing 22. Specifically, the housing 22 may be fixedly attached to the base 10. The terminal 102 is electrically connected to the upper spring 16 through the gap between the lens assembly 14 and the housing 22.

The invention also provides a camera module comprising the driving device.

The invention also provides electronic equipment comprising the camera module.

Referring to fig. 4, the driving device assembling method according to an embodiment of the present invention includes the following steps:

s11, providing the base 10. The base 10 includes terminals 102.

Specifically, the base 10 further includes a base 104, and the terminal 102 is embedded in the base 104. The base 104 may be injection molded from plastic. The terminal 102 is made of a conductive material, such as metal. Specifically, in the present embodiment, the terminals 102 are two spaced apart from each other. The base 10 is provided with a first convex column 106. The four corners of the base 10 are respectively provided with a corner post 107, and the corner post 107 is provided with a second convex post 108.

S13, providing the lower spring 12, disposing the lower spring 12 on the base 10, and fixing one end of the lower spring 12 to the base 10. Specifically, the lower spring 12 is a unitary body, and one end of the lower spring is fixedly connected to the base 10, and the other end of the lower spring is fixedly connected to the lens assembly 14, and the lower spring 12 can support the lens assembly 14 and can allow the lens assembly 14 to move relative to the base 10. Specifically, the lower spring 12 includes a first inner ring, a first connection deformation portion, and a first outer ring, the connection deformation portion is deformable and is connected between the first inner ring and the first outer ring, the first outer ring is fixedly connected to the base 10, and the first inner ring is fixedly connected to the lens assembly 14. More specifically, the lower spring 12 is provided with a first locking hole 122, and the first protrusion 106 of the base 10 is locked in the first locking hole 122.

S15, providing the lens assembly 14 and the coil 18, disposing the coil 18 on the lens assembly 14, disposing the lens assembly 14 on the base 10, and connecting the other end of the lower spring 12 to the lens assembly 14. Specifically, the coil 18 may be assembled on the lens assembly 14, and then the lens assembly 14 is disposed on the base 10, or the lens assembly 14 may be disposed on the base 10, and then the coil 18 is assembled on the lens assembly 14.

Specifically, the lens assembly 14 includes a carrier 142 and a lens 144 secured to the carrier 142. Specifically, in the embodiment, the carrier 142 and the lens 144 are integrated. It will be appreciated that the carrier 142 and lens 144 may also be a split structure that is assembled together when assembled. When the carrier 142 and the lens 144 are integrally formed, the assembly process can be simplified. Specifically, the carrier 142 is provided with a third protrusion 146. The coil 18 is disposed on the carrier 142. In the present embodiment, the number of the coils 18 is two. More specifically, two coils 18 are provided on two opposite sides of the lens assembly 14, respectively. In this way, the coils 18 are not arranged on the other two sides of the lens assembly 14, so that the external dimensions of the other two sides of the driving device can be reduced, and the driving device is beneficial to miniaturization. Of course, the number of the coils 18 may be one or three or more.

S17, providing the upper spring 16, and disposing the upper spring 16 on the lens assembly 14, wherein the upper spring 16 is electrically connected to the terminal 102 and the coil 18, respectively.

Specifically, the spring 16 is fixedly connected to the base 10 at one end and to the lens assembly 14 at the other end to allow the lens assembly 14 to move relative to the base 10. Specifically, the upper spring 16 includes a first upper spring portion 162 and two second upper spring portions 164, and one end of each of the first upper spring portion 162 and the second upper spring portion 164 is fixedly connected to the base 10, and the other end of each of the first upper spring portion 162 and the second upper spring portion 164 is fixedly connected to the lens assembly 14, so as to allow the lens assembly 14 to move relative to the base 10. The two second upper spring portions 164 are electrically connected to the two terminals 102, respectively.

Specifically, the upper spring 16 includes a first upper spring portion 162 and two second upper spring portions 164, and one end of each of the first upper spring portion 162 and the second upper spring portion 164 is fixedly connected to the base 10, and the other end of each of the first upper spring portion 162 and the second upper spring portion 164 is fixedly connected to the lens assembly 14, so as to allow the lens assembly 14 to move relative to the base 10.

In step S17, the steps of electrically connecting the upper spring 16 with the terminal 102 and the coil 18 respectively are as follows: the two second upper spring portions 164 are electrically connected to the two terminals 102, and may be welded together; one end of each of the two coils 18 is electrically connected to the two second upper spring portions 164, and the other end of each of the two coils 18 is electrically connected to the first upper spring portion 162, so that the two coils 18 are connected in series, and current flows in from one terminal 102, sequentially passes through one second upper spring portion 164, the first upper spring portion 162, the other second upper spring portion 164, and finally flows out through the other terminal 102. When the number of the coils 18 is one, the upper spring 16 is divided into two parts, and the two parts of the upper spring 16 are electrically connected with two ends of the coils 18 respectively; when the number of the coils 18 is three or more, the connection relationship of the circuits can be adjusted according to the requirement, and the description is omitted here.

More specifically, the upper spring 16 includes a second inner ring, a second coupling deformation portion, and a second outer ring, the second coupling deformation portion being deformable and coupled between the second inner ring and the second outer ring, the second outer ring being fixedly coupled to the base 10, and the second inner ring being fixedly coupled to the lens assembly 14. More specifically, the second outer ring of the upper spring 16 is provided with a second locking hole 166, the second inner ring is provided with a third locking hole 168, the second protrusion 108 of the base 10 is locked into the second locking hole 166, and the third protrusion 146 of the carrier 142 is locked into the third locking hole 168.

S19, providing the magnet 20 and the housing 22, disposing the magnet 20 in the housing 22, and snapping the housing 22 over the lens assembly 14, with the upper spring 16 between the lens assembly 14 and the housing 22, and with the magnet 20 and the coil 18 disposed correspondingly.

Specifically, the housing 22 is housed on the base 10, and the lower spring 12, the lens assembly 14, the upper spring 16, the coil 18, and the magnet 20 are housed in the housing 22. The housing 22 may be fixedly attached to the base 10. The terminal 102 is electrically connected to the upper spring 16 through the gap between the lens assembly 14 and the housing 22.

By using the assembly method of the driving device, the terminal 102 is electrically connected with the upper spring 16 electrically connected with the coil 18, and the electrical connection is realized through the upper spring 16, so that the connection process of the terminal 102 and the upper spring 16 can work on the upper part of the lens component 14, the operation space is large, and the operation is convenient. Meanwhile, because the upper part of the lens assembly 14 is operated, the lower spring 12, the lens assembly 14 and the shell 22 can be arranged above the base 10 in sequence, all the components do not need to be turned over, the operation is more convenient, and the assembly process is also more simplified. In addition, since the work is performed on the upper portion of the lens module 14, a protective film may be added when the upper spring 16 and the terminal 102 are welded together, thereby preventing the lens module 14 from being contaminated during welding.

In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on," "disposed on" or "located on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements present.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 can be understood in a specific case to those of ordinary skill in the art.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.