阅读说明：本技术 一种无人机桨叶连接结构 (Unmanned aerial vehicle paddle connection structure ) 是由 曹雷 于 2020-07-06 设计创作，主要内容包括：本发明涉及无人机技术领域,具体为一种无人机桨叶连接结构,安装于无人机螺旋桨上,包括安装架、转动座、桨叶、滑动座和连接杆；安装架的第一端安装于无人机螺旋桨上；转动座安装于安装架的第二端上；桨叶包括安装座和桨叶本体,安装座安装于转动座上,桨叶本体可转动连接于安装座上；滑动座可滑动连接于安装架上,连接杆第一端铰接于滑动座上,连接杆第二端活动连接于桨叶本体上,滑动滑动座可使连接杆驱动桨叶本体展开或者折叠收拢,从而便于无人机的存放。(The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle paddle connecting structure which is arranged on a propeller of an unmanned aerial vehicle and comprises an installation frame, a rotating seat, a paddle, a sliding seat and a connecting rod; the first end of the mounting rack is mounted on the propeller of the unmanned aerial vehicle; the rotating seat is arranged on the second end of the mounting rack; the paddle comprises a mounting seat and a paddle body, the mounting seat is mounted on the rotating seat, and the paddle body is rotatably connected to the mounting seat; but sliding seat sliding connection articulates on the sliding seat on the mounting bracket, and connecting rod second end swing joint is on the paddle body, and sliding seat can make connecting rod drive paddle body expand or fold and draw in to be convenient for unmanned aerial vehicle deposit.)

1. An unmanned aerial vehicle paddle connecting structure is arranged on an unmanned aerial vehicle propeller and is characterized by comprising a mounting frame (2), a rotating seat (3), a paddle (4), a sliding seat (6) and a connecting rod (7);

the first end of the mounting rack (2) is mounted on the unmanned aerial vehicle propeller; the rotating seat (3) is arranged at the second end of the mounting rack (2);

the paddle (4) comprises a mounting seat (41) and a paddle body (42), the mounting seat (41) is mounted on the rotating seat (3), and the paddle body (42) is rotatably connected to the mounting seat (41);

but sliding seat (6) sliding connection in on mounting bracket (2), connecting rod (7) first end articulate in on sliding seat (6), connecting rod (7) second end swing joint in on paddle body (42), slide sliding seat (6) can make connecting rod (7) drive paddle body (42) expand or fold and draw in.

2. The unmanned aerial vehicle paddle connection structure of claim 1, characterized in that, still include fixed establishment (5), be equipped with slip boss (411) and fixed orifices (412) on mount pad (41), be equipped with on rotating seat (3) with slip boss (411) matched with first sliding tray (31), fixed establishment (5) set up in rotate seat (3), and fixed establishment (5) can block in or withdraw from fixed orifices (412).

3. The unmanned aerial vehicle paddle connection structure of claim 2, characterized in that, fixed establishment (5) includes mounting (51), first elastic component (52) and pull ring (53), but mounting (51) sliding connection in rotate on seat (3), the first end of mounting (51) is equipped with fixed boss (511), but fixed boss (511) card is gone into or withdraws from fixed hole (412), first elastic component (52) cover is located on mounting (51), and its one end butt in fixed boss (511) on, the other end butt in rotate on seat (3), pull ring (53) set up in the second of mounting (51) is served.

4. The unmanned aerial vehicle paddle connection structure of claim 1, further comprising a first hinge base (8) and a first ball head (9), wherein the first ball head (9) is hinged to the first hinge base (8) through a ball joint, the first ball head (9) is in threaded connection with the first end of the connecting rod (7), and the first hinge base (8) is mounted on the sliding base (6) so that the first end of the connecting rod (7) is hinged to the sliding base (6).

5. The unmanned aerial vehicle paddle connection structure of claim 4, characterized in that, be equipped with on mount pad (6) and connect boss (61), connect boss (61) top slope setting, first free bearing (8) fixed connection is in on the inclined plane at connect boss (61) top.

6. The unmanned aerial vehicle paddle connection structure of claim 5, wherein the angle of inclination of the top of the connection boss (61) is 20-70 degrees.

7. The unmanned aerial vehicle paddle connection structure of claim 1, further comprising a second hinge base (10) and a second ball head (11), wherein the second ball head (11) is hinged to the second hinge base (10) through a ball joint, the second ball head (11) is in threaded connection with the second end of the connecting rod (7), and the second hinge base (10) is slidably connected to the paddle body (42) so that the second end of the connecting rod (7) is movably connected to the paddle body (42).

8. The unmanned aerial vehicle paddle connection structure of claim 7, further comprising a connector (12), wherein the rotating base (3) is rotatably connected to the second end of the mounting bracket (2), the connector (12) is fixedly connected to the paddle body (42), so that the connector (12) and the paddle body (42) enclose a second sliding groove (121), and the second hinge base (10) is slidably connected to the second sliding groove (121).

9. The unmanned aerial vehicle paddle connection structure of claim 1, further comprising a second elastic member (13) and a permanent magnetic chuck (14), wherein the permanent magnetic chuck (14) is fixedly connected to the mounting frame (2), the permanent magnetic chuck (14) can be magnetically attracted to the sliding seat (6), an annular placing cavity (141) is formed in the permanent magnetic chuck (14), the second elastic member (13) is arranged in the annular placing cavity (141), one end of the second elastic member abuts against the end portion of the annular placing cavity (141), and the other end of the second elastic member abuts against the sliding seat (6).

Technical Field

The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle paddle connecting structure.

Background

An unmanned aerial vehicle, abbreviated as "unmanned aerial vehicle" ("UAV"), is an unmanned aerial vehicle that is operated using a radio remote control device and a self-contained program control device. Unmanned aerial vehicles are in fact a general term for unmanned aerial vehicles, and can be defined from a technical perspective as follows: unmanned fixed wing aircraft, unmanned VTOL aircraft, unmanned airship, unmanned helicopter, unmanned multi-rotor aircraft, unmanned paravane, etc. Compared with manned aircraft, it has the advantages of small volume, low cost, convenient use, etc.

Disclosure of Invention

Technical problem to be solved

In order to solve the problems, the invention provides an unmanned aerial vehicle blade connecting structure which can fold and furl blades, so that the unmanned aerial vehicle can be conveniently stored.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: an unmanned aerial vehicle paddle connecting structure is arranged on an unmanned aerial vehicle propeller and comprises a mounting frame, a rotating seat, a paddle, a sliding seat and a connecting rod; the first end of the mounting rack is mounted on the propeller of the unmanned aerial vehicle; the rotating seat is arranged on the second end of the mounting rack; the paddle comprises a mounting seat and a paddle body, the mounting seat is mounted on the rotating seat, and the paddle body is rotatably connected to the mounting seat; but sliding seat sliding connection is on the mounting bracket, and connecting rod first end articulates on sliding seat, and connecting rod second end swing joint is on the paddle body, and sliding seat can make the connecting rod drive paddle body expand or fold and draw in.

Preferably, this unmanned aerial vehicle paddle connection structure still includes fixed establishment, is equipped with slip boss and fixed orifices on the mount pad, rotates and is equipped with the first sliding tray with slip boss matched with on the seat, and fixed establishment sets up on rotating the seat, and fixed establishment can block in or withdraw from the fixed orifices.

Preferably, the fixing mechanism includes a fixing member, a first elastic member and a pull ring, the fixing member is slidably connected to the rotating base, a fixing boss is disposed at a first end of the fixing member, the fixing boss can be clamped into or withdrawn from the fixing hole, the first elastic member is sleeved on the fixing member, one end of the first elastic member abuts against the fixing boss, the other end of the first elastic member abuts against the rotating base, and the pull ring is disposed at a second end of the fixing member.

Preferably, this unmanned aerial vehicle paddle connection structure still includes first free bearing and first bulb, and first bulb ball joint articulates on first free bearing, and first bulb and the first end threaded connection of connecting rod, and first free bearing is installed on the sliding seat to make the first end of connecting rod articulate on the sliding seat.

Preferably, the mounting base is provided with a connecting boss, the top of the connecting boss is obliquely arranged, and the first hinge base is fixedly connected to the inclined surface at the top of the connecting boss.

Preferably, the angle of inclination of the top of the connection boss is 20-70 degrees.

Preferably, this unmanned aerial vehicle paddle connection structure still includes second free bearing and second bulb, and second bulb ball joint articulates on the second free bearing, and second bulb and connecting rod second end threaded connection, second free bearing sliding connection is on the paddle body to make connecting rod second end swing joint on the paddle body.

Preferably, this unmanned aerial vehicle paddle connection structure still includes the connecting piece, rotates seat rotatable coupling on the second of mounting bracket is served, and connecting piece fixed connection is on the paddle body to make connecting piece and paddle body enclose synthetic second sliding tray, but second free bearing sliding connection is on the second sliding tray.

Preferably, this unmanned aerial vehicle paddle connection structure still includes second elastic component and permanent magnetism sucking disc, and permanent magnetism sucking disc fixed connection is on the mounting bracket, and the permanent magnetism sucking disc can be inhaled with the sliding seat magnetism, is equipped with the annular on the permanent magnetism sucking disc and places the chamber, and the intracavity is placed to the annular in to the second elastic component, and its one end butt is placed the chamber tip in the annular, and the other end butt is on the sliding seat.

(III) advantageous effects

The invention provides an unmanned aerial vehicle paddle connecting structure, which has the following beneficial effects: after the flight operation of the unmanned aerial vehicle is finished, the sliding seat slides away from the rotating seat, so that the sliding seat drives the connecting rod to drive the blade body to swing downwards, the blade body is folded and furled, the occupied space of the blade body is reduced, and the unmanned aerial vehicle can be stored conveniently; otherwise, expand the regulation to the paddle body when needs to during unmanned aerial vehicle's flight operation, slide the regulation to the sliding seat, so that the sliding seat is close to and rotates the seat and slide, because the total length of connecting rod can not change, thereby when making the sliding seat be close to and rotate the seat and slide, will order about connecting rod drive paddle body and around the mount pad upwards swing, until expandes the paddle body completely, can satisfy unmanned aerial vehicle's flight user demand.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

FIG. 1 shows an overall structural diagram of an embodiment of the present invention;

FIG. 2 shows an enlarged view of section A of FIG. 1;

FIG. 3 shows a second overall structural diagram of an embodiment of the present invention;

FIG. 4 shows an enlarged view of portion B of FIG. 3;

FIG. 5 shows a schematic structural view of a mount in an embodiment of the invention;

FIG. 6 shows a schematic structural view of a rotating seat in an embodiment of the present invention;

FIG. 7 shows a schematic structural view of a fixing mechanism in an embodiment of the invention;

fig. 8 shows a schematic structural diagram of a permanent magnetic chuck in an embodiment of the present invention.

In the figure: 2 mounting bracket, 3 rotating base, 31 first sliding groove, 4 paddles, 41 mounting base, 411 sliding boss, 412 fixed orifices, 42 paddle body, 5 fixed establishment, 51 fixed part, 511 fixed boss, 52 first elastic component, 53 pull ring, 6 sliding base, 61 connecting boss, 7 connecting rod, 8 first hinge base, 9 first bulb, 10 second hinge base, 11 second bulb, 12 connecting piece, 121 second sliding groove, 13 second elastic component, 14 permanent magnetic chuck, 141 annular placing cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, an embodiment of the present invention provides an unmanned aerial vehicle blade connection structure, which is mounted on an unmanned aerial vehicle propeller and includes a mounting frame 2, a rotating base 3, a blade 4, a sliding base 6 and a connecting rod 7;

the first end of the mounting frame 2 is mounted on the propeller of the unmanned aerial vehicle; the rotating seat 3 is arranged on the second end of the mounting frame 2;

the blade 4 comprises a mounting seat 41 and a blade body 42, the mounting seat 41 is mounted on the rotating seat 3, and the blade body 42 is rotatably connected to the mounting seat 41;

but slide holder 6 sliding connection is on mounting bracket 2, and connecting rod 7 first end articulates on slide holder 6, and connecting rod 7 second end swing joint is on paddle body 42, and slide holder 6 can make connecting rod 7 drive paddle body 42 expand or fold and draw in.

According to the scheme, after the flight operation of the unmanned aerial vehicle is finished, the sliding seat 6 slides away from the rotating seat 3, so that the sliding seat 6 drives the connecting rod 7 to drive the blade body 42 to swing downwards, the blade body 42 is folded and furled, the occupied space of the blade body 42 is reduced, and the unmanned aerial vehicle can be conveniently stored; on the contrary, expand the regulation as required to paddle body 42, so that during unmanned aerial vehicle's flight operation, slide 6 and adjust, so that slide 6 is close to and rotates seat 3 and slide, because the total length of connecting rod 7 can not change, thereby make slide 6 be close to when rotating seat 3 slides, will order about connecting rod 7 drive paddle body 42 around mount pad 41 upswing, until unfolding paddle body 42 completely, unmanned aerial vehicle's flight user demand can be satisfied, at this moment, paddle body 42, mounting bracket 2 and connecting rod 7 form the triangle-shaped structure jointly, so that connecting rod 7 supports paddle body 42, thereby improve paddle body 42 at the intensity of flight in-process, and then do benefit to paddle body 42's life's improvement.

In this embodiment, one end of the blade body 42 is rotatably connected to the mounting base 41 through a rotating shaft.

Further, in order to facilitate the realization of installing fast or dismantling paddle 4, this unmanned aerial vehicle paddle connection structure still includes fixed establishment 5, is equipped with slip boss 411 and fixed orifices 412 on the mount pad 41, rotates and is equipped with the first sliding tray 31 with slip boss 411 matched with on the seat 3, and fixed establishment 5 sets up on rotating seat 3, and fixed establishment 5 can block into or withdraw from fixed orifices 412.

Specifically, the blade 4 can be fixedly mounted on the rotating base 3 by sliding the blade 4 and clamping the fixing mechanism 5 into the fixing hole 412; conversely, the fixing mechanism 5 is withdrawn out of the fixing hole 412, and the blade 4 is slid, so that the blade 4 can be detached from the rotating base 3, and the blade 4 can be more simply and quickly mounted or detached. In this embodiment, the first sliding groove 31 is a dovetail groove, and the sliding boss 411 is a dovetail boss, so that the sliding of the sliding boss 411 and the first sliding groove 31 is more stable and reliable, and the phenomenon of shaking is not easy to occur.

Further, the fixing mechanism 5 may be snapped into or out of the fixing hole 412 for facilitating the mounting or dismounting of the blade 4. The fixing mechanism 5 includes a fixing member 51, a first elastic member 52 and a pull ring 53, the fixing member 51 is slidably connected to the rotating base 3, a first end of the fixing member 51 is provided with a fixing boss 511, the fixing boss 511 can be inserted into or withdrawn from the fixing hole 412, the first elastic member 52 is sleeved on the fixing member 51, one end of the first elastic member abuts against the fixing boss 511, the other end of the first elastic member abuts against the rotating base 3, and the pull ring 53 is disposed on a second end of the fixing member 51.

Specifically, the rotating base 3 is provided with a sliding hole and a relief hole, so that the fixing member 51 is slidably connected to the rotating base 3. When the blade 4 needs to be installed on the rotating base 3, the pull ring 53 needs to be pulled first, so that the fixing member 51 slides on the rotating base 3, and the fixing boss 511 slides into the avoiding hole, at this time, the first elastic member 52 is in a compressed state, then the sliding boss 411 and the first sliding groove 31 are matched and slide to a set position, then the pull ring 53 is released, under the elastic force action of the first elastic member 52, the fixing member 51 can slide on the rotating base 3, and the fixing boss 511 slides and is clamped into the fixing hole 412, so that the installation of the blade 4 is completed.

On the contrary, when the blade 4 needs to be detached from the rotating base 3, the pull ring 53 is pulled first, so that the fixing member 51 slides on the rotating base 3, and the fixing boss 511 is completely slid and withdrawn out of the fixing hole 412, at this time, the first elastic member 52 is in a compressed state, then the blade 4 is slid, the blade 4 can be detached from the rotating base 3, so as to complete the detachment of the blade, at this time, the pull ring 53 is loosened, the fixing member 51 can slide on the rotating base 3 under the elastic force action of the first elastic member 52, and the maximum shape of the pull ring 53 is larger than the diameter of the sliding hole, so that the phenomenon that the fixing member 51 slides out of the sliding hole can be avoided. In this embodiment, the first elastic member 52 is a compression spring.

Further, in order to facilitate the first end of the connecting rod 7 to be hinged on the sliding seat 6, the requirement for unfolding or folding the blade body 42 is met. This unmanned aerial vehicle paddle connection structure still includes first free bearing 8 and first bulb 9, and 9 ball joints of first bulb articulate on first free bearing 8, and first bulb 9 and the first end threaded connection of connecting rod 7, and first free bearing 8 is installed on sliding seat 6 to make 7 first ends of connecting rod articulate on sliding seat 6.

Further, in order to prevent the first ball 9 from interfering with the first hinge base 8 during the unfolding or folding and folding operation of the blade body 42, the unfolding or folding adjustment of the blade body 42 is affected. The mounting seat 6 is provided with a connecting boss 61, the top of the connecting boss 61 is obliquely arranged, and the first hinged support 8 is fixedly connected to the inclined surface at the top of the connecting boss 61. In this embodiment, the positioning groove is formed on the inclined surface at the top of the connecting boss 61, so that the first hinge base 8 is fixedly mounted on the connecting boss 61.

Specifically, when the top of the connecting boss 61 is arranged horizontally and the first hinged support 8 is fixedly connected to the horizontal plane top of the connecting boss 61, if the blade body 42 is unfolded and adjusted, the unfolding amplitude of the blade body 42 is small, otherwise the first ball head 9 interferes with the first hinged support 8, so that the unmanned aerial vehicle is not favorable for flying; if the first hinge base 8 is fixedly connected to the vertical side wall of the connecting boss, when the blade body 42 is folded and adjusted, the folding range of the blade body 42 is small, otherwise, the first ball head 9 interferes with the first hinge base 8, and therefore the folding, folding and storage of the blade 4 are not facilitated.

Further, in order to make paddle body 42 can obtain the bigger range of expanding and fold and draw in the range in to unmanned aerial vehicle's flight is used or is deposited. The inclination angle of the top of the connecting boss 61 is 20-70 degrees. In this embodiment, the preferred 45 degrees of inclination at connection boss 61 top to make paddle body 42 have the best range of expanding and fold and draw in the range, with the user demand that satisfies unmanned aerial vehicle or deposit the demand.

Further, in order to facilitate the second end of the connecting rod 7 to be movably connected to the blade body 42, the requirements for unfolding or folding the blade body 42 are met. This unmanned aerial vehicle paddle connection structure still includes second free bearing 10 and second bulb 11, and 11 ball joints of second bulb articulate on second free bearing 10, and second bulb 11 and connecting rod 7 second end threaded connection, and second free bearing 10 sliding connection is on paddle body 42 to make connecting rod 7 second end swing joint on paddle body 42.

Further, in order to allow the blades 4 to be rotatably adjusted, the connecting rods 7 do not interfere with the rotational adjustment thereof, thereby affecting the rotational adjustment of the blades 4. This unmanned aerial vehicle paddle connection structure still includes connector 12, rotates seat 3 rotatable coupling and holds on the second of mounting bracket 2, and connector 12 fixed connection is on paddle body 42 to make connector 12 and paddle body 42 enclose synthetic second sliding tray 121, but second free bearing 10 sliding connection is on second sliding tray 121.

Specifically, when rotating seat 3 and rotating to drive paddle 4 and rotate, second free bearing 10 can slide in second sliding tray 121, so that connecting rod 7 can suit with paddle body 42 all the time, thereby avoid connecting rod 7 to rotate the in-process and produce the interference with paddle body 42, and influence paddle body 42 pivoted risk.

In this embodiment, the first end of mounting bracket 2 is installed on the unmanned aerial vehicle screw, then mounting bracket 2, rotation seat 3 and paddle 4 can rotate along with the screw to realize unmanned aerial vehicle's flight operation. The rotating seat 3 is rotatably connected to the second end of the mounting frame 2 through a rotating shaft, and the rotating shaft can be rotatably connected to the mounting frame 2 through a swing motor. When the swing seat is used, the swing motor can be controlled by using an external control device, so that the rotation angle of the rotating seat 3 can be accurately adjusted. The installation frame 2 is provided with an avoiding groove, so that when the rotating seat 3 is rotatably adjusted, the blade 4 and the installation frame 2 cannot interfere with each other, and the blade 4 can be conveniently rotatably adjusted. During the use, rotate seat 3 through using external control device and rotate the regulation, then can make paddle 4 rotate with rotating seat 3 together to the realization is to the regulation of different angles between paddle 4 and the horizontal plane, so that satisfy different flight operation and flight state's user demand. Meanwhile, the accurate adjustment of different angles of the rotating seat 3 can be realized through an external control device, and the influence of external environmental factors can not be caused.

Further, can effectively fix after in order to make paddle body 42 can expand automatically and draw in the regulation in to make things convenient for unmanned aerial vehicle's flight to use or deposit. This unmanned aerial vehicle paddle connection structure still includes second elastic component 13 and permanent magnetism sucking disc 14, and 14 fixed connection of permanent magnetism sucking disc are on mounting bracket 2, and permanent magnetism sucking disc 14 can inhale with 6 magnetism of sliding seat, are equipped with the annular on the permanent magnetism sucking disc 14 and place chamber 141, and second elastic component 13 is arranged the annular in placing chamber 141, and its one end butt is placed the chamber 141 tip in the annular, and the other end butt is on sliding seat 6.

Specifically, when the flight operation of the unmanned aerial vehicle is finished and the unmanned aerial vehicle needs to be stored, the sliding seat 6 is close to the permanent magnetic chuck 14 to slide, so that the sliding seat 6 drives the connecting rod 7 to drive the blade body 42 to swing downwards, the blade body 42 is folded, until the sliding seat 6 abuts against the end part of the permanent magnetic chuck 14, the switch of the permanent magnetic chuck 14 is adjusted to an ON gear, at the moment, the permanent magnetic chuck 14 can be magnetically attracted with the sliding seat 6 to fix the sliding seat 6 ON the position, so that the unmanned aerial vehicle is convenient to store, at the moment, the second elastic part 13 is in a compressed state and is completely arranged in the annular placing cavity 141;

expand the regulation to paddle body 42 as required to when carrying out unmanned aerial vehicle flight operation, adjust the switch of permanent magnetism sucking disc 14 to the OFF shelves, permanent magnetism sucking disc 14 then can not inhale with sliding seat 6 magnetism this moment, then under the elastic force effect of second elastic component 13, permanent magnetism sucking disc 14 slip will be kept away from to sliding seat 6, until expandes paddle body 42 completely, thereby make things convenient for unmanned aerial vehicle to fly the operation. In this embodiment, the second elastic element 13 is a compression spring, and the bottom end of the sliding seat 6 is made of a magnetic material.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.