阅读说明：本技术 舱门限位组件及具有其的航空航天设备 (Cabin door limiting assembly and aerospace equipment with cabin door limiting assembly ) 是由 任明法 张志宗 王春平 王�琦 翁飞 于 2019-10-29 设计创作，主要内容包括：本发明提供了一种舱门限位组件及具有其的航空航天设备。舱门限位组件包括：主体,设置有端框；舱门组件,可转动地安装在端框的第一侧,舱门组件包括舱门和设置在舱门上的锁定组件,舱门具有将端框的端口扣盖上的关门位置和将端框的端口打开的开门位置；弹性元件,安装在舱门和端框之间以使舱门从关门位置切换至开门位置；限位缓冲机构,包括限位组件和缓冲组件,缓冲组件位于限位组件的顶部,舱门打开至预定角度时,锁定组件与限位组件配合连接,并在缓冲组件的限定下锁紧在预定角度处。本发明能够有效防止舱门反弹或者限位失效的问题出现,能够实现分离装置中舱门的打开与防反弹,此结构也适用于其它小型的含舱门的装置中。(The invention provides a cabin door limiting assembly and aerospace equipment with the cabin door limiting assembly. The spacing subassembly of hatch door includes: a main body provided with an end frame; the hatch door assembly is rotatably arranged on the first side of the end frame and comprises a hatch door and a locking assembly arranged on the hatch door, and the hatch door is provided with a door closing position for covering the port of the end frame and a door opening position for opening the port of the end frame; an elastic element installed between the hatch door and the end frame to switch the hatch door from a closed door position to an open door position; the limiting buffer mechanism comprises a limiting component and a buffer component, wherein the buffer component is positioned at the top of the limiting component, and when the cabin door is opened to a preset angle, the locking component is connected with the limiting component in a matched mode and locked at the preset angle under the limitation of the buffer component. The invention can effectively prevent the problem of cabin door rebound or limit failure, can realize the opening and rebound prevention of the cabin door in the separating device, and is also suitable for other small-sized devices containing the cabin door.)

1. A door restraint assembly, comprising:

the device comprises a main body (10), wherein an end frame (11) is arranged on the main body (10);

a door assembly (20), said door assembly (20) being rotatably mounted on a first side of said end stile (11), said door assembly (20) comprising a door (21) and a locking assembly disposed on said door (21), said door (21) having a closed door position for covering a port of said end stile (11) and an open door position for opening a port of said end stile (11);

an elastic element (30), the elastic element (30) being mounted between the hatch door (21) and the end bell (11) to switch the hatch door (21) from the closed door position to the open door position;

the limiting buffer mechanism (40), the limiting buffer mechanism (40) comprises a limiting component (41) and a buffer component (42), the buffer component (42) is positioned at the top of the limiting component (41), when the cabin door (21) is opened to a preset angle, the locking component is matched and connected with the limiting component (41) and locked at the preset angle under the limitation of the buffer component (42).

2. Door stop assembly according to claim 1, characterized in that the first side of the end frame (11) is provided with a first groove (111), the elastic element (30) is a torsion spring mounted in the first groove (111), the first end of the torsion spring is fixed on the side wall of the first groove (111), and the second end of the torsion spring is fixed on the door (21).

3. The door limiting assembly according to claim 2, wherein the door assembly (20) further comprises a door shaft (23), a protrusion (213) is disposed on one side of the door (21) close to the end frame (11), the protrusion (213) is inserted into the first groove (111), a second groove (2131) for avoiding the torsion spring is disposed on the protrusion (213), first through holes (112) are disposed on both sides of the first groove (111), second through holes (2132) are disposed on both sides of the second groove (2131), the door shaft (23) is inserted into the torsion spring, the first through holes (112) and the second through holes (2132), and both ends of the door shaft (23) protrude out of the end frame (11).

4. The door restraint assembly of claim 3 wherein the first through hole (112) is a circular hole, the second through hole (2132) is a non-circular hole, and the door shaft (23) is a non-cylindrical structure that fits into the non-circular hole.

5. The door restraint assembly of claim 3 wherein the locking assembly comprises:

a first link block (221), the first link block (221) being fixed to a first end of the door shaft (23);

a second coupling block (222), the second coupling block (222) being fixed to a second end of the door shaft (23);

the periphery of the first connecting shaft block (221) and the periphery of the second connecting shaft block (222) are provided with hooks (223) used for being connected with the limiting assembly (41).

6. The door restraint assembly according to claim 5 wherein the restraint cushioning mechanism (40) further comprises two positioning portions (43), the two positioning portions (43) are respectively disposed on opposite sides of the main body (10), the two restraint assemblies (41) are disposed on the two positioning portions (43) in a one-to-one correspondence, and the two cushioning assemblies (42) are disposed on the two positioning portions (43) in a one-to-one correspondence.

7. Door stop assembly according to claim 6, characterized in that the positioning part (43) is a positioning housing provided with an opening (431) on the side close to the end frame (11), the cushioning assembly (42) and the stop assembly (41) being mounted at the opening (431).

8. The door restraint assembly of claim 6 wherein the first and second coupling blocks (221, 222) are each provided at their periphery with a first circular arc segment (224), the hook (223) being located at an end of the first circular arc segment (224), the restraint assembly (41) comprising:

a first spring (411), wherein the first spring (411) is horizontally arranged on the positioning part (43), and a first end of the first spring (411) is fixed on the positioning part (43);

the limiting block (412) is fixed to the second end of the first spring (411), a clamping groove (4121) matched with the hook (223) is formed in the top of the limiting block (412), and a second arc section (413) is arranged at one end, close to the first side of the end frame (11), of the limiting block (412).

9. The door restraint assembly of claim 8 wherein the bumper assembly (42) comprises:

a second spring (421), wherein the second spring (421) is horizontally arranged on the positioning part (43), the elastic coefficient of the second spring (421) is larger than that of the first spring (411), and the first end of the second spring (421) is fixed on the positioning part (43);

a buffer block (422), the buffer block (422) being fixed to a second end of the second spring (421).

10. Door stop assembly according to claim 1, characterized in that the side of the main body (10) close to the door assembly (20) is provided with a rubber mat (50).

11. Aerospace device comprising a door restraint assembly, wherein the door restraint assembly is a door restraint assembly according to any one of claims 1 to 10.

Technical Field

The invention relates to the technical field of aerospace products, in particular to a cabin door limiting assembly and aerospace equipment with the cabin door limiting assembly.

Background

The door limit structure is generally used in a device containing the door, and has the main functions of: the maximum opening angle of the cabin door is limited, and the rebound phenomenon after the cabin door is opened is prevented.

Some existing mechanisms for preventing the door from bouncing after opening are as follows:

the back of the cabin door and the baffle are provided with limiting devices, so that the cabin door can be locked after being opened in place, and the cabin door can not rebound.

The locking pin and the leaf spring mechanism are adopted, and the locking pin enters the round hole of the leaf spring through impact to lock the cabin door.

The side wall of the cabin door is provided with a limit pin which works in cooperation with a compression spring, and after the cabin door is opened at a certain angle, the limiting function is realized through a limit groove.

Most of the existing part of anti-bounce mechanisms of the cabin doors have large impact and are easily influenced by the environment, and the structures of the existing part of anti-bounce mechanisms of the cabin doors are easy to lose efficacy when the bounce of the cabin doors is large.

Disclosure of Invention

The invention mainly aims to provide a cabin door limiting assembly and aerospace equipment with the cabin door limiting assembly, and aims to solve the problem that the cabin door limiting assembly in the prior art is easy to fail.

In order to achieve the above object, according to one aspect of the present invention, there is provided a door check assembly including: the main body is provided with an end frame; a door assembly rotatably mounted to a first side of the end stile, the door assembly comprising a door having a closed position covering a port of the end stile and an open position opening the port of the end stile and a locking assembly disposed on the door; a resilient element mounted between the door and the end stile to switch the door from the closed door position to the open door position; the limiting buffer mechanism comprises a limiting component and a buffer component, the buffer component is located at the top of the limiting component, when the cabin door is opened to a preset angle, the locking component is connected with the limiting component in a matched mode, and the buffer component is limited and locked at the preset angle.

Further, the first side of end frame is provided with first recess, elastic element is for installing the torsional spring in the first recess, the first end of torsional spring is fixed on the lateral wall of first recess, the second end of torsional spring is fixed on the hatch door.

Further, the hatch door subassembly still includes the door-hinge, the hatch door is close to one side of end frame is provided with the lug, the lug is inserted and is established in the first recess, be provided with on the lug and dodge the second recess of torsional spring, the both sides of first recess all are provided with first through-hole, the both sides of second recess all are provided with the second through-hole, the door-hinge is worn to establish the torsional spring first through-hole and in the second through-hole, just the both ends of door-hinge all protrude in the end frame.

Further, the first through hole is a circular hole, the second through hole is a non-circular hole, and the door spindle is of a non-cylindrical structure matched with the non-circular hole.

Further, the locking assembly includes: the first connecting shaft block is fixed at the first end of the door shaft; the second connecting shaft block is fixed at the second end of the door shaft; the periphery of the first connecting shaft block and the periphery of the second connecting shaft block are provided with hooks used for being connected with the limiting assembly.

Furthermore, the limiting buffer mechanism further comprises two positioning parts, the two positioning parts are respectively arranged on two opposite sides of the main body, the two limiting assemblies are arranged on the two positioning parts in a one-to-one correspondence manner, and the two buffer assemblies are arranged on the two positioning parts in a one-to-one correspondence manner.

Furthermore, location portion is the location shell, the location shell is close to one side of end frame is provided with the opening, buffering subassembly with spacing subassembly is all installed the opening part.

Further, first pivot piece with the periphery of second pivot piece all is provided with first circular arc section, the couple is located the tip of first circular arc section, spacing subassembly includes: the first spring is horizontally arranged on the positioning part, and a first end of the first spring is fixed on the positioning part; the limiting block is fixed to the second end of the first spring, a clamping groove matched with the hook is formed in the top of the limiting block, and a second arc section is arranged at one end, close to the first side of the end frame, of the limiting block.

Further, the buffer assembly includes: the second spring is horizontally arranged on the positioning part, the elastic coefficient of the second spring is greater than that of the first spring, and the first end of the second spring is fixed on the positioning part; and the buffer block is fixed at the second end of the second spring.

Further, a rubber mat is arranged on one side, close to the cabin door assembly, of the main body.

According to another aspect of the invention, an aerospace device is provided, which includes a door restraint assembly, wherein the door restraint assembly is the door restraint assembly.

By applying the technical scheme of the invention, when the hatch door is actually used, the port of the end frame is closed under the action of external force, the elastic element is compressed by the hatch door in the process, when the hatch door needs to be opened, the port of the end frame is opened by the hatch door under the action of the restoring force of the elastic element, and after the hatch door is opened to a preset angle, the locking assembly on the hatch door assembly can be matched and connected with the limiting assembly and locked under the limitation of the buffer assembly, so that the problem of rebound or failure of the limit of the hatch door can be effectively prevented. The structure is simple and reliable, can realize the opening and the anti-rebounding of the hatch door in the separation device when being used in the cube star separation device, and is also suitable for other small devices containing the hatch door.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

figure 1 schematically illustrates an exploded view of the door restraint assembly of the present invention;

FIG. 2 schematically illustrates a side view of the door check assembly of the present invention in a closed door position; and

figure 3 schematically illustrates a side view of the door check assembly of the present invention in an open door position.

Wherein the figures include the following reference numerals:

10. a main body; 11. an end frame; 111. a first groove; 112. a first through hole; 12. a side plate; 20. a hatch door assembly; 21. a cabin door; 213. a bump; 2132. a second through hole; 2131. a second groove; 221. A first connecting shaft block; 222. a second coupling block; 223. hooking; 224. a first arc segment; 23. a door shaft; 30. an elastic element; 40. a limiting buffer mechanism; 41. a limiting component; 411. a first spring; 412. a limiting block; 4121. a card slot; 413. a second arc segment; 42. a buffer assembly; 421. a second spring; 422. a buffer block; 43. A positioning part; 431. an opening; 50. a rubber pad.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions of the present invention better understood, 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.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

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.

Referring to fig. 1 to 3, according to an embodiment of the present invention, there is provided a door check assembly, which includes a main body 10, a door assembly 20, an elastic member 30, and a check damper mechanism 40.

Wherein, the main body 10 is provided with an end frame 11; the hatch door assembly 20 is rotatably installed on a first side of the end frame 11, the hatch door assembly 20 comprises a hatch door 21 and a locking assembly arranged on the hatch door 21, and in actual use, the hatch door 21 has a closed door position for covering a port of the end frame 11 and an open door position for opening the port of the end frame 11; the elastic member 30 is installed between the hatch 21 and the end frame 11 to switch the hatch 21 from the closed door position to the open door position; the limiting buffer mechanism 40 comprises a limiting component 41 and a buffer component 42, wherein the buffer component 42 is positioned at the top of the limiting component 41, when the cabin door 21 is opened to a preset angle, the locking component is matched and connected with the limiting component 41, and is locked at the preset angle under the limitation of the buffer component 42.

In practical use, the hatch 21 is acted by external force to close the port of the end frame 11, in the process, the hatch 21 compresses the elastic element 30, when the hatch 21 needs to be opened, the hatch 21 opens the port of the end frame 11 under the restoring force of the elastic element 30, after the hatch 21 is opened to a preset angle, the locking assembly on the hatch assembly 20 can be matched and connected with the limiting assembly 41 and locked under the limitation of the buffer assembly 42, and the problem that the hatch 21 rebounds or the limiting fails can be effectively prevented. The structure is simple and reliable, can realize the opening and the anti-rebounding of the hatch door in the separation device when being used in the cube star separation device, and is also suitable for other small devices containing the hatch door.

Referring to fig. 1, the first side of the end frame 11 in this embodiment is provided with a first groove 111, and the elastic element 30 is a torsion spring installed in the first groove 111, a first end of the torsion spring is fixed on a sidewall of the first groove 111, and a second end of the torsion spring is fixed on the door 21. When the hatch door 21 is closed, the torsion spring is twisted tightly, and when the hatch door 21 needs to be opened, the torsion spring releases the restoring force of the torsion spring, so that the hatch door 21 is opened, and the structure is simple and convenient to realize.

The door assembly 20 further includes a door shaft 23, a protrusion 213 is disposed on one side of the door 21 close to the end frame 11, the protrusion 213 is inserted into the first groove 111, a second groove 2131 for avoiding the torsion spring is disposed on the protrusion 213, first through holes 112 are disposed on two sides of the first groove 111, second through holes 2132 are disposed on two sides of the second groove 2131, the door shaft 23 penetrates through the torsion spring, the first through holes 112 and the second through holes 2132, and two ends of the door shaft 23 protrude out of the end frame 11. When the torsion spring releases the restoring force, the door shaft 23 drives the door 21 to rotate along the first through hole 112, and drives the door 21 to open the port of the end frame 11.

Preferably, the first through hole 112 in this embodiment is a circular hole, which facilitates the rotation of the door shaft 23 in the first through hole 112, the second through hole 2132 is a non-circular hole, and the door shaft 23 is a non-cylindrical structure matched with the non-circular hole, which facilitates the synchronous driving of the rotation of the door 21 in the rotation process of the door shaft 23.

During actual installation, door shaft 23 is injectd in first through-hole 112 through the round pin axle, and stable in structure is reliable, prevents that door shaft 23 from dropping out from first through-hole 112.

Referring again to fig. 1 to 3, the locking assembly in the present embodiment includes a first coupling block 221 and a second coupling block 222, wherein the first coupling block 221 is fixed to a first end of the door shaft 23; the second coupling block 222 is fixed to the second end of the door shaft 23; wherein, the periphery of the first connecting shaft block 221 and the second connecting shaft block 222 is provided with a hook 223 for connecting with the limiting component 41.

The first coupling block 221 and the second coupling block 222 are provided with hooks 223, so that the door 21 can be locked at a predetermined opening angle stably, and the door is conveniently matched and connected with the limiting assembly 41.

In order to support and position the limiting component 41 and the buffering component 42, the limiting buffering mechanism 40 in this embodiment further includes two positioning portions 43, during actual installation, the two positioning portions 43 are respectively disposed on two opposite sides of the main body 10, correspondingly, the two limiting components 41 are disposed on the two positioning portions 43 in a one-to-one correspondence, and the two buffering components 42 are disposed on the two positioning portions 43 in a one-to-one correspondence, so as to be conveniently matched with the first connecting shaft block 221 and the second connecting shaft block 222 to stably limit the cabin door 21.

Preferably, the positioning portion 43 is a positioning housing, an opening 431 is formed on one side of the positioning housing close to the end frame 11, and the buffering assembly 42 and the limiting assembly 41 are both installed at the opening 431, so as to be conveniently connected with the first connecting shaft block 221 and the second connecting shaft block 222 in a matching manner for limiting and locking.

In this embodiment, the peripheries of the first connecting shaft block 221 and the second connecting shaft block 222 are both provided with a first arc segment 224, the hook 223 is located at an end of the first arc segment 224, the limiting assembly 41 includes a first spring 411 and a limiting block 412, wherein the first spring 411 is horizontally arranged on the positioning portion 43, and a first end of the first spring 411 is fixed on the positioning portion 43; the limiting block 412 is fixed at the second end of the first spring 411, a clamping groove 4121 matched with the hook 223 is arranged at the top of the limiting block 412, and a second arc segment 413 is arranged at one end, close to the first side of the end frame 11, of the limiting block 412.

When the torsional spring releases the restoring force, the door shaft 23 rotates in the first through hole 112, and drives the first connecting shaft block 221 and the second connecting shaft block 222 to rotate, in the process, the first arc section 224 rotates along the second arc section 413, and pushes the limit block 412 to move towards the direction far away from the first side of the end frame 11, when the hooks 223 on the first connecting shaft block 221 and the second connecting shaft block 222 overturn to the top of the limit block 412 along the second arc section 413, the first spring 411 resets, the limit block 412 moves towards the direction close to the first side of the end frame 11, at the moment, the hooks 223 hook in the clamping groove 4121, the cabin door 21 can be locked, and the problem of failure of opening of the cabin door 21 is avoided.

Preferably, the buffer assembly 42 includes a second spring 421 and a buffer block 422, wherein the second spring 421 is horizontally disposed on the positioning portion 43, the elastic coefficient of the second spring 421 is greater than that of the first spring 411, so as to effectively prevent the hook 223 from turning over, and a first end of the second spring 421 is fixed on the positioning portion 43; the buffer block 422 is fixed to the second end of the second spring 421, so as to buffer the first coupling block 221 and the second coupling block 222, and to stably lock the door 21 at a predetermined opening angle.

Preferably, the rubber pad 50 is disposed on a side of the main body 10 close to the door assembly 20 in this embodiment, so as to effectively prevent the door 21 from rubbing against the main body 10, and further prevent the door 21 from rebounding. In this embodiment, the bottom of the end frame 11 is provided with a side plate 12, and the rubber pad 50 may be fixed on the side plate 12 or the side wall of the end frame 11.

Referring to fig. 1 to 3 again, the hatch 21 in this embodiment is driven by the acting force of the torsion spring, the hatch assembly 20 rotates around the first through hole 112 of the end frame 11 to open, after the hatch 21 opens and rotates to a predetermined angle, the first connecting shaft block 221 and the second connecting shaft block 222 are both limited by the buffer block 422 and the limiting block 412, and the hatch assembly 20 is limited, so that the limiting and anti-rebounding functions of the hatch 21 are realized.

When the door 21 is in the closed position, as shown in fig. 2, the door 21 is acted by the torsion spring and is powered by the opening force of the door 21. When the door 21 is opened, the door assembly 20 rotates through a predetermined angle under the driving of the torsion spring, during the rotation, the first arc segment 224 on the first connecting shaft block 221 and the second connecting shaft block 222 meets the second arc segment 413 of the limit block 412, so that the limit block 412 and the first spring 411 are compressed, when the door assembly 20 moves to the state shown in fig. 3, the limit block 412 rebounds to the original position, then the door assembly 20 continues to rotate, the first connecting shaft block 221 and the second connecting shaft block 222 contact the buffer block 422, the buffer block 422 and the second spring 421 are compressed until the bottom edge of the door 21 contacts and collides with the rubber gasket 50, then the door assembly 20 rebounds, when the door assembly rebounds to the state shown in fig. 3, the hooks 223 of the first connecting shaft block 221 and the second connecting shaft block 222 contact the slots 4121 of the limit block 412, at this time, the limit block 412 limits the door assembly 20 and prevents the door from rebounding; finally, the hatch door assembly 20 stays in a state where the hatch door 21 contacts the rubber pad 50 under the action of the torsion spring, and at this time, the buffer block 422 and the rubber pad 50 are both in an extrusion state, so that the bounce of the hatch door 21 can be effectively prevented.

In the process of the opening movement of the hatch door 21, the limiting component 41 consisting of the limiting block 412 and the first spring 411 mainly plays a role in preventing rebounding, so that the part of the hatch door 21 does not have large resistance to the hatch door 21 in the process of unfolding, and the rigidity for compressing the first spring 411 is designed to be small and is easy to compress.

The damping assembly 42 composed of the damping block 422 and the second spring 421 mainly plays a damping role, so that the rigidity of the second spring 421 is designed to be large, the length of the damping block 422 is long, and the magnitude of the damping force provided by the damping assembly 42 is determined by the compression amount of the second spring 421 under the action of the first connecting shaft block 221 and the second connecting shaft block 222. When the hatch door 21 is opened at a certain angle, the hatch door 21 cannot be continuously rotated to be opened and cannot be rebounded, so that the functions of limiting the hatch door 21 and preventing rebounding are realized.

According to another aspect of the invention, there is provided aerospace equipment comprising a door restraint assembly as described above.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the first connecting shaft block and the second connecting shaft block of the cabin door limiting assembly are rigidly connected to the door shaft and are consistent with the rotating angle of the door shaft. The initial installation angles of the first connecting shaft block and the second connecting shaft can be calculated to coordinate with the limiting block to realize the mechanism function. The design of buffer block, cushion has all played the cushioning effect to the hatch door subassembly, avoids the impact force too big. The cabin door limiting assembly adopts two sets of anti-rebounding limiting buffer mechanisms, is symmetrically arranged left and right, and has high stability and reliability, wide application range, strong practicability and high reliability.

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 invention 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.

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.

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

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.