阅读说明：本技术 移载机构及具有其的生产线 (Move and carry mechanism and have its production line ) 是由 陈贵华 张朋涛 刘超 余长周 于 2021-07-21 设计创作，主要内容包括：本发明提供了一种移载机构及具有其的生产线,移载机构包括：机体,机体沿预定轨迹可移动地设置；夹持组件,设置在机体的第一侧面上,夹持组件包括夹持端面,夹持端面与第一侧面相对间隔设置,以在第一侧面与夹持端面之间构成夹持空间；承托组件,设置在机体的第二侧面上,承托组件包括承托端面,承托端面由第二侧面上朝向远离机体的方向延伸。本发明解决了现有技术中的空调的生产效率低的问题。(The invention provides a transfer mechanism and a production line with the same, wherein the transfer mechanism comprises: the body is movably arranged along a preset track; the clamping assembly is arranged on the first side surface of the machine body and comprises a clamping end surface, and the clamping end surface and the first side surface are oppositely arranged at intervals so as to form a clamping space between the first side surface and the clamping end surface; the bearing component is arranged on the second side face of the machine body and comprises a bearing end face, and the bearing end face extends from the second side face in the direction away from the machine body. The invention solves the problem of low production efficiency of the air conditioner in the prior art.)

1. A transfer mechanism, comprising:

the device comprises a machine body (1), wherein the machine body (1) is movably arranged along a preset track;

the clamping assembly (2) is arranged on a first side surface of the machine body (1), the clamping assembly (2) comprises a clamping end surface, and the clamping end surface and the first side surface are oppositely arranged at intervals so as to form a clamping space between the first side surface and the clamping end surface;

the supporting component (3) is arranged on the second side face of the machine body (1), the supporting component (3) comprises a supporting end face, and the supporting end face extends towards the direction far away from the machine body (1) on the second side face.

2. The transfer mechanism according to claim 1, wherein the gripping assembly (2) further comprises:

the clamping component (20) is arranged opposite to the first side surface of the machine body (1) at intervals, and the clamping end surface is arranged on the clamping component (20);

the clamping part (20) is movably arranged in a direction approaching or departing from the machine body (1).

3. The transfer mechanism according to claim 2, wherein the gripping assembly (2) further comprises:

a support member (21) mounted on the machine body (1), the support member (21) extending from the machine body (1) in a direction away from the machine body (1);

at least part of the clamping member (20) is mounted on the support member (21), the clamping member (20) being movably arranged in the extension direction of the support member (21).

4. The transfer mechanism according to claim 3, wherein the gripping assembly (2) further comprises:

a drive member (22), the drive member (22) having a telescopically arranged drive rod, the drive rod being in driving connection with the gripping member (20).

5. The transfer mechanism according to claim 1, further comprising:

the bottom support component (4) is installed on the machine body (1), the bottom support component (4) extends from the machine body (1) to the direction far away from the machine body (1), and the bottom support component (4) is located at the bottom of the clamping space;

the shoe part (4) is rotatably arranged around a predetermined axis, and the clamping assembly (2) is movably arranged towards the direction close to or far away from the shoe part (4).

6. The transfer mechanism according to claim 5, further comprising:

the first lifting assembly (5) is installed on the machine body (1), the first lifting assembly (5) comprises a first moving part (50) and a first guide rod (51), the first moving part (50) is sleeved on the first guide rod (51), and the first moving part (50) moves along the extending direction of the first guide rod (51);

the clamping assembly (2) is connected with the first moving part (50).

7. The transfer mechanism according to any one of claims 1 to 6, wherein the supporting element (3) further comprises:

the pressing component (30) is installed on the machine body (1), and the pressing component (30) is provided with a pressing end face which is opposite to the bearing end face;

the pressing part (30) is movably arranged towards the direction close to or far away from the bearing end face.

8. The transfer mechanism according to claim 7, characterized in that said supporting element (3) further comprises:

a support member (31) mounted on the machine body (1), wherein the support member (31) extends from the machine body (1) in a direction away from the machine body (1), and the support end surface is arranged on the support member (31);

the pressing part (30) and the supporting part (31) are arranged at intervals along the length direction of the machine body (1).

9. The transfer mechanism according to claim 7, further comprising:

the second lifting assembly is arranged on the machine body (1) and comprises a second moving part and a second guide rod, the second moving part is sleeved on the second guide rod, and the second moving part moves along the extending direction of the second guide rod;

the pressing member (30) is connected to the second moving member.

10. A production line comprising a feeding conveying line (300), a transferring mechanism (100) and a palletizing conveying line (200), the transferring mechanism (100) being located between the feeding conveying line (300) and the palletizing conveying line (200) to clamp a product on the feeding conveying line (300) onto the palletizing conveying line (200), characterized in that the transferring mechanism (100) is the transferring mechanism (100) according to any one of claims 1 to 9.

11. The production line of claim 10, wherein the palletization conveyor line (200) comprises:

a loading platform (2001) for conveying products;

a first positioning component (2004) arranged at the side of the feeding platform (2001), wherein at least part of the first positioning component (2004) is movably arranged towards the direction close to or far away from the product so as to position the product;

a blocking component (2002) arranged on the feeding platform (2001), wherein the blocking component (2002) is telescopically arranged along the vertical direction so as to block or avoid the product.

12. The production line of claim 10, wherein the feeding line (300) comprises:

a transport platform (3001) for transporting products;

a second positioning component (3002) arranged at the side of the conveying platform (3001), wherein at least part of the second positioning component (3002) is movably arranged towards the direction close to or far away from the product so as to position the product;

the limiting plate (3003) is arranged at the end part of the conveying platform (3001), and at least part of the limiting plate (3003) is attached to the product so as to limit the product.

Technical Field

The invention relates to the field of workpiece transferring, in particular to a transferring mechanism and a production line with the same.

Background

At present, various industries are developing towards the direction of automatic production so as to liberate labor force and improve the production efficiency of products.

In the case of production air conditioning, when a processed product is transferred from one conveyor line to another, a robot-independently developed jig is generally used to be off-line, so as to eliminate manual operation.

However, the clamp can only correspond to a single type of product, a new clamp needs to be replaced when the type of the product is switched every time, the clamp is low in universality, and the production efficiency of the air conditioner is affected.

Disclosure of Invention

The invention mainly aims to provide a transfer mechanism and a production line with the same, and aims to solve the problem that the production efficiency of an air conditioner in the prior art is low.

In order to achieve the above object, according to one aspect of the present invention, there is provided a transfer mechanism including: the body is movably arranged along a preset track; the clamping assembly is arranged on the first side surface of the machine body and comprises a clamping end surface, and the clamping end surface and the first side surface are oppositely arranged at intervals so as to form a clamping space between the first side surface and the clamping end surface; the bearing component is arranged on the second side face of the machine body and comprises a bearing end face, and the bearing end face extends from the second side face in the direction away from the machine body.

Further, the clamping assembly further comprises: the clamping component is arranged opposite to the first side surface of the machine body at intervals, and the clamping end surface is arranged on the clamping component; the holding member is movably disposed in a direction approaching or departing from the body.

Further, the clamping assembly further comprises: the supporting component is arranged on the machine body and extends from the machine body to the direction far away from the machine body; at least part of the clamping member is mounted on the support member, the clamping member being movably arranged in the extension direction of the support member.

Further, the clamping assembly further comprises: the driving component is provided with a driving rod which is arranged in a telescopic mode, and the driving rod is in driving connection with the clamping component.

Further, the transfer mechanism further includes: the collet component is arranged on the machine body, extends from the machine body towards the direction far away from the machine body, and is positioned at the bottom of the clamping space; the shoe member is rotatably disposed about a predetermined axis, and the gripping assembly is movably disposed toward and away from the shoe member.

Further, the transfer mechanism further includes: the first lifting assembly is arranged on the machine body and comprises a first moving part and a first guide rod, the first moving part is sleeved on the first guide rod, and the first moving part moves along the extending direction of the first guide rod; the clamping assembly is connected with the first moving part.

Further, the racking assembly further comprises: the pressing component is arranged on the machine body and is provided with a pressing end face, and the pressing end face is opposite to the bearing end face; the pressing part is movably arranged towards the direction close to or far away from the bearing end face.

Further, the racking assembly further comprises: the supporting part is arranged on the machine body, extends towards the direction far away from the machine body, and the supporting end face is arranged on the supporting part; the pressing part and the supporting part are arranged at intervals along the length direction of the machine body.

Further, the transfer mechanism further includes: the second lifting assembly is arranged on the machine body and comprises a second moving part and a second guide rod, the second moving part is sleeved on the second guide rod, and the second moving part moves along the extending direction of the second guide rod; the pressing part is connected with the second moving part.

According to another aspect of the present invention, there is provided a production line, including a feeding transmission line, a transferring mechanism and a palletizing transmission line, wherein the transferring mechanism is located between the feeding transmission line and the palletizing transmission line to clamp a product on the feeding transmission line onto the palletizing transmission line, and is characterized in that the transferring mechanism is the above-mentioned transferring mechanism.

Further, the pile up neatly transfer chain includes: the feeding platform is used for conveying products; the first positioning assembly is arranged on the side of the feeding platform, and at least part of the first positioning assembly is movably arranged towards the direction close to or far away from the product so as to position the product; the blocking component is arranged on the feeding platform and telescopically arranged in the vertical direction so as to block or avoid the product.

Further, the material loading transmission line includes: the conveying platform is used for conveying products; the second positioning assembly is arranged on the side of the conveying platform, and at least part of the second positioning assembly is movably arranged towards the direction close to or far away from the product so as to position the product; the limiting plate is arranged at the end part of the conveying platform, and at least part of the limiting plate is attached to the product so as to limit the product.

By applying the technical scheme of the invention, the transfer mechanism comprises a machine body, a clamping component and a bearing component, wherein the machine body is movably arranged along a preset track; the clamping assembly is arranged on the first side surface of the machine body and comprises a clamping end surface, and the clamping end surface and the first side surface are oppositely arranged at intervals so as to form a clamping space between the first side surface and the clamping end surface; the bearing subassembly sets up on the second side of organism, and the bearing subassembly includes the bearing terminal surface, and the bearing terminal surface is extended towards the direction of keeping away from the organism on by the second side. The product is respectively fixed by arranging the clamping component and the supporting component, when the product does not have a supporting plate and can only be clamped, the product is clamped by utilizing the action of the clamping component, when the product has the supporting plate, the supporting component operates, the product is supported by utilizing the supporting end face, and then the product is transported to a designated position by utilizing the movement of the machine body; the universality of the transfer mechanism is increased, so that the transfer mechanism can transport different products by utilizing the clamping component and the bearing component; the air conditioner production device takes the production of the air conditioner as an example, the air conditioner can be divided into various products such as an air conditioner outdoor unit, an indoor unit or a window machine, various products can be transported through the transfer mechanism, clamps do not need to be replaced according to different products, and the production efficiency of the air conditioner is greatly improved.

Drawings

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

fig. 1 shows a schematic structural view of an embodiment of a transfer mechanism according to the present invention;

FIG. 2 shows a schematic structural view of a production line according to the present invention;

figure 3 shows a schematic structural view of a palletization conveyor line of a production line according to the present invention; and

fig. 4 shows a schematic view of the structure of the feeding line of the production line according to the present invention.

Wherein the figures include the following reference numerals:

100. a transfer mechanism; 1. a body; 2. a clamping assembly; 20. a clamping member; 21. a support member; 210. a guide rail; 22. a drive member; 3. a holding assembly; 30. a pressing member; 31. a supporting member; 4. a shoe member; 40. a holding unit; 5. a first lifting assembly; 50. a first moving member; 51. a first guide bar;

200. a stacking conveying line; 2001. a feeding platform; 2002. a blocking member; 2003. a stacking tray; 2004. a first positioning assembly; 2005. a first photosensor;

300. a feeding transmission line; 3001. a conveying platform; 3002. a second positioning assembly; 3003. a limiting plate; 3004. a second photosensor.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application 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.

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 present invention provides a transfer mechanism, please refer to fig. 1 to 4, including: the device comprises a machine body 1, wherein the machine body 1 is movably arranged along a preset track; the clamping assembly 2 is arranged on the first side surface of the machine body 1, the clamping assembly 2 comprises a clamping end surface, and the clamping end surface and the first side surface are oppositely arranged at intervals so as to form a clamping space between the first side surface and the clamping end surface; bearing subassembly 3 sets up on the second side of organism 1, and bearing subassembly 3 includes the bearing terminal surface, and the bearing terminal surface is extended towards the direction of keeping away from organism 1 on the second side.

The transfer mechanism provided by the invention comprises a machine body 1, a clamping component 2 and a supporting component 3, wherein the machine body 1 is movably arranged along a preset track; the clamping assembly 2 is arranged on a first side surface of the machine body 1, the clamping assembly 2 comprises a clamping end surface, and the clamping end surface and the first side surface are oppositely arranged at intervals so as to form a clamping space between the first side surface and the clamping end surface; bearing subassembly 3 sets up on the second side of organism 1, and bearing subassembly 3 includes the bearing terminal surface, and the bearing terminal surface is extended towards the direction of keeping away from organism 1 on the second side. The product is fixed by arranging the clamping component 2 and the supporting component 3 respectively, when the product does not have a supporting plate and can only be clamped, the product is clamped by utilizing the action of the clamping component 2, when the product has the supporting plate, the supporting component 3 operates, the product is supported by utilizing the supporting end face, and then the product is transported to a designated position by utilizing the movement of the machine body 1; thus, the universality of the transfer mechanism is increased, and the transfer mechanism can transport different products by utilizing the clamping component 2 and the bearing component 3; the air conditioner production device takes the production of the air conditioner as an example, the air conditioner can be divided into various products such as an air conditioner outdoor unit, an indoor unit or a window machine, various products can be transported through the transfer mechanism, clamps do not need to be replaced according to different products, and the production efficiency of the air conditioner is greatly improved.

Specifically, the clamping assembly 2 further comprises: the clamping component 20 is arranged opposite to the first side surface of the machine body 1 at intervals, and the clamping end surface is arranged on the clamping component 20; the holding member 20 is movably disposed in a direction approaching or departing from the machine body 1. The size of the clamping space is adjusted in this way, so that the clamping assembly 2 can clamp products of different sizes. Preferably, the clamping member 20 is provided with a buffer pad, and the buffer pad is mounted on the clamping end surface and contacts with the product through the buffer pad, so as to avoid scratching the appearance of the product.

In the implementation, the clamping assembly 2 further comprises: a support member 21 mounted on the machine body 1, the support member 21 extending from the machine body 1 in a direction away from the machine body 1; at least part of the holding member 20 is mounted on the support member 21, and the holding member 20 is movably disposed in the extending direction of the support member 21. The supporting members 21 are provided with guide rails 210, the clamping members 20 are mounted on the guide rails 210 and move along the extending direction of the guide rails 210, the clamping members 20 are supported by the supporting members 21, the number of the supporting members 21 is two, and the two supporting members 21 are arranged at intervals along the width direction of the clamping members 20 to ensure the supporting stability of the clamping members 20.

Further, the clamping assembly 2 further comprises: a driving part 22, the driving part 22 is provided with a driving rod which is telescopically arranged, and the driving rod is connected with the clamping part 20 in a driving way. The driving component 22 is preferably a driving cylinder, an electric push rod or a hydraulic rod, the clamping assembly 2 further comprises a mounting plate, the mounting plate is mounted on the machine body and located between the two supporting components 21, the mounting plate is respectively connected with the two supporting components 21, the driving component 22 is mounted on the mounting plate, and the driving component 22 is supported by the mounting plate; the clamping assembly 2 further comprises a connecting plate mounted on the guide rail 210, and the clamping member 20 is mounted on the connecting plate, such that the horizontal pushing force of the driving rod is transmitted to the clamping member 20 arranged along the vertical direction through the connecting plate, so as to control the clamping member 20 to move along the direction close to or far away from the machine body 1.

In order to avoid the product to drop at the centre gripping in-process, move and carry mechanism and still include: the bottom support component 4 is arranged on the machine body 1, the bottom support component 4 extends from the machine body 1 to the direction far away from the machine body 1, and the bottom support component 4 is positioned at the bottom of the clamping space; the shoe member 4 is rotatably disposed about a predetermined axis, and the gripping assembly 2 is movably disposed toward and away from the shoe member 4. Carry out the bearing to the product through collet part 4, rotationally set up collet part 4 around predetermined axis, when needs are to the product centre gripping, dodge the product, when the product centre gripping behind the centre gripping space, carry out the bearing to the product. Preferably, the collet part 4 includes a plurality of bearing units 40 and rotation axis, the bearing unit is connected with the rotation axis, a plurality of bearing units 40 set up along the extending direction interval of rotation axis, drive a plurality of bearing units 40 through the rotation axis and rotate in step, be provided with the gasket on the terminal surface of bearing unit 40, in order to avoid scraping the surface of drawing the product, be close to or keep away from collet part 4 through centre gripping subassembly 2 orientation, make clamping member 20, form the fixed space to the product is fixed between organism 1 and the bearing unit 40, in order to guarantee the stability of product in the transportation.

In an embodiment provided by the present invention, the transfer mechanism further includes: the first lifting assembly 5 is installed on the machine body 1, the first lifting assembly 5 comprises a first moving part 50 and a first guide rod 51, the first moving part 50 is sleeved on the first guide rod 51, and the first moving part 50 moves along the extending direction of the first guide rod 51; the clamping assembly 2 is connected to the first moving member 50. The first moving member 50 is guided by the first guide rod 51 to move the clamping assembly 2 in the extending direction of the first guide rod 51, providing a driving force for moving the clamping assembly 2. Preferably, the first guide rod 51 is a screw rod, and the first moving member 50 is a nut engaged with the screw rod, so that the structure is simple and convenient to implement, wherein the machine body 1 is a frame structure, and the first lifting assembly 5 is installed in the frame.

In the embodiment of the invention, as shown in fig. 1, the supporting element 3 further comprises: the pressing part 30 is arranged on the machine body 1, the pressing part 30 is provided with a pressing end face, and the pressing end face is opposite to the bearing end face; the pressing part 30 is movably arranged toward or away from the supporting end face. Through the supporting effect of bearing terminal surface and the effect that compresses tightly of compressing tightly part 30, fix the product and compress tightly between part 30 and the bearing terminal surface to fix the product.

In particular, the supporting element 3 further comprises: a support member 31 attached to the machine body 1, the support member 31 extending from the machine body 1 in a direction away from the machine body 1, and a support end surface provided on the support member 31; the pressing member 30 and the receiving member 31 are spaced apart from each other in the longitudinal direction of the machine body 1. The supporting component 31 includes a first fork plate and a second fork plate, the first fork plate and the second fork plate are arranged at intervals along the width direction of the machine body, the first fork plate and the second fork plate support the product, when the product is forked on the first fork plate and the second fork plate, the pressing component 30 moves downwards to press the product, and preferably, a buffer gasket is arranged on the pressing end face of the pressing component 30.

In the specific implementation process, the transfer mechanism further comprises: the second lifting assembly is arranged on the machine body 1 and comprises a second moving part and a second guide rod, the second moving part is sleeved on the second guide rod, and the second moving part moves along the extending direction of the second guide rod; the pressing member 30 is connected to the second moving member. The second moving part drives the compressing part 30 to move, the compressing part 30 is guided through the second guide rod, so that the compressing part 30 is controlled to move, preferably, the second guide rod is a screw rod, the second moving part is a nut in threaded connection with the screw rod, the structure is simple, implementation is convenient, and the moving position of the compressing part 30 is controlled conveniently.

The present invention further provides a production line, as shown in fig. 2 to 4, including a feeding transmission line 300, a transferring mechanism 100 and a palletizing transmission line 200, where the transferring mechanism 100 is located between the feeding transmission line 300 and the palletizing transmission line 200 to clamp a product on the feeding transmission line 300 onto the palletizing transmission line 200, and the transferring mechanism 100 is the transferring mechanism 100 of the above embodiment.

Specifically, as shown in fig. 3, the palletizing conveyor line 200 includes: a loading platform 2001 for transporting products; a first positioning unit 2004 provided at a side of the loading platform 2001, at least a part of the first positioning unit 2004 being movably provided toward a direction approaching or separating from the product to position the product; and the blocking component 2002 is arranged on the feeding platform 2001, and the blocking component 2002 is telescopically arranged along the vertical direction so as to block or avoid the product. The first positioning component 2004 is preferably a driving cylinder, the end of a piston rod of the driving cylinder is provided with a clamping plate, and when the piston rod is pushed out, the clamping plate clamps the product between the side surface of the feeding platform 2001 and the clamping end surface of the clamping plate; or the first positioning assemblies 2004 are two groups, the two groups of first positioning assemblies 2004 are respectively arranged at two sides of the feeding platform 2001, and the product is clamped or released by the relative extension or retraction of the clamping plates in the two groups of first positioning assemblies 2004; the blocking member 2002 is preferably a telescopic rod to block the product after the product is transported to a designated location.

The stacking conveyor line 200 further comprises a stacking tray 2003 installed on the feeding platform 2001 and used for bearing products, a first photoelectric sensor 2005 is arranged at the end of the feeding platform 2001 and used for detecting whether the products exist on the feeding platform 2001 or not, when the first photoelectric sensor 2005 detects that the transfer mechanism 100 places the products on the stacking tray 2003, the products are determined to exist, the first positioning component 2004 positions the products, and the blocking component 2002 protrudes to block the products, so that the stability of the products is guaranteed.

As shown in fig. 4, the feeding line 300 includes: a delivery platform 3001 for delivering products; a second positioning component 3002 arranged at the side of the conveying platform 3001, wherein at least part of the second positioning component 3002 is movably arranged towards the direction close to or far away from the product so as to position the product; the limiting plate 3003 is arranged at the end of the conveying platform 3001, and at least part of the limiting plate 3003 is attached to the product so as to limit the product. The feeding transmission line 300 further includes a second photoelectric sensor 3004, the second photoelectric sensor 3004 is disposed at an end of the conveying platform 3001, and the second photoelectric sensor 3004 detects whether a product is at a clamping position of the conveying platform 3001, when the product is detected, the second positioning component 3002 extends out toward a direction close to the product until the product is attached to the product, and waits for the transferring mechanism 100 to clamp the product.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the transfer mechanism provided by the invention comprises a machine body 1, a clamping component 2 and a supporting component 3, wherein the machine body 1 is movably arranged along a preset track; the clamping assembly 2 is arranged on a first side surface of the machine body 1, the clamping assembly 2 comprises a clamping end surface, and the clamping end surface and the first side surface are oppositely arranged at intervals so as to form a clamping space between the first side surface and the clamping end surface; bearing subassembly 3 sets up on the second side of organism 1, and bearing subassembly 3 includes the bearing terminal surface, and the bearing terminal surface is extended towards the direction of keeping away from organism 1 on the second side. The product is fixed by arranging the clamping component 2 and the supporting component 3 respectively, when the product does not have a supporting plate and can only be clamped, the product is clamped by utilizing the action of the clamping component 2, when the product has the supporting plate, the supporting component 3 operates, the product is supported by utilizing the supporting end face, and then the product is transported to a designated position by utilizing the movement of the machine body 1; thus, the universality of the transfer mechanism is increased, and the transfer mechanism can transport different products by utilizing the clamping component 2 and the bearing component 3; the air conditioner production device takes the production of the air conditioner as an example, the air conditioner can be divided into various products such as an air conditioner outdoor unit, an indoor unit or a window machine, various products can be transported through the transfer mechanism, clamps do not need to be replaced according to different products, and the production efficiency of the air conditioner is greatly improved.

It should be noted that the terms "first," "second," and the like in the description and claims of this application 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 data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described 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.

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.

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.