阅读说明：本技术 一种拨禾机构及含有其的割台和玉米收获机 (Reel mechanism and contain its header and maize picker ) 是由 张明源 宋玉兵 王岩亮 赵凯龙 齐广敏 刘娜 于 2020-12-16 设计创作，主要内容包括：本发明涉及一种拨禾机构及含有其的割台和玉米收获机,包括至少两个并排设置的输送通道,每个输送通道的两侧分别设置有拨禾链,输送通道以其中两个输送通道之间的间隙处为界线分为两组或以一侧侧端为界线全部为一组,每个输送通道靠近界线一侧的拨禾链为从动链,远离界线一侧的拨禾链为主动链,主动链分别沿对应的输送通道从前向后延伸,其后端用于动力输入,从动链设置于对应的输送通道的前端,除界线处的从动链以外,其他从动链与相邻输送通道的主动链通过换向机构传动连接。本发明利用相邻输送通道之间的间隙设置换向机构,使得一个输送通道的主动链可以传递动力给相邻输送通道的从动链,能在有限的空间内实现合理的装配。(The invention relates to a reel mechanism, a header containing the reel mechanism and a corn harvester, comprising at least two conveying channels arranged side by side, wherein two sides of each conveying channel are respectively provided with a reel chain, the conveying channels are divided into two groups by taking a gap between the two conveying channels as a boundary line or are all divided into one group by taking one side end as a boundary line, the reel chain on one side of each conveying channel close to the boundary line is a driven chain, the reel chain on one side far away from the boundary line is a driving chain, the driving chains respectively extend from front to back along the corresponding conveying channels, the rear ends of the driving chains are used for power input, the driven chains are arranged at the front ends of the corresponding conveying channels, and except the driven chains on the boundary line, the other driven chains are in transmission connection with the driving chains of the adjacent conveying channels through a reversing mechanism. The reversing mechanism is arranged by utilizing the gap between the adjacent conveying channels, so that the driving chain of one conveying channel can transmit power to the driven chain of the adjacent conveying channel, and reasonable assembly can be realized in a limited space.)

1. A reel mechanism comprises at least two conveying channels (1) which are arranged side by side, reel chains (2) are respectively arranged on two sides of each conveying channel (1), the conveying channels (1) are divided into two groups by taking a gap between the two conveying channels (1) as a boundary line or are all divided into one group by taking one side end as a boundary line, the reel chain (2) on one side, close to the boundary line, of each conveying channel (1) is a driven chain (21), the reel chain (2) on one side, far away from the boundary line, is a driving chain (22), the driving chains (22) respectively extend from front to back along the corresponding conveying channel (1), the rear ends of the driving chains are used for power input, the driven chains (21) are arranged at the front ends of the corresponding conveying channels (1), and except the driven chains (21) on the boundary line, other driven chains (21) and driving chains (22) adjacent to the conveying channels (1) are connected through a reversing mechanism (2) 3) And (5) transmission connection.

2. A reel-up according to claim 1, characterised in that the conveying channel (1) is completely grouped with one side end as a boundary, and the driven chain (21) at the boundary extends backwards for power input.

3. A reel mechanism according to claim 1, characterized in that the conveying channels (1) are divided into two groups by a gap between two of the conveying channels (1), and both of the driven chains (21) at the boundary extend backward for power input.

4. A reel mechanism according to claim 1, characterized in that the conveying channels (1) are divided into two groups by taking the gap between two conveying channels (1) as a boundary, and one of the two driven chains (21) at the boundary extends backwards for power input and is in transmission connection with the other through a reversing mechanism (3).

5. Reel mechanism according to any one of claims 1 to 4, characterized in that the driven chain (21) and the driving chain (22) are both double-chain structures and are provided with tensioning means.

6. Reel-up according to claim 5, characterized in that the tensioning device of the driven chain (21) is an elastic crank tensioner (24) and the tensioning device of the driving chain (22) is a spring tensioner (23).

7. Reel mechanism according to any one of claims 1 to 4, characterized in that said reel chain (2) comprises at least two chain wheels (25) and a drive chain (26) connecting said chain wheels (25), the reversing mechanism (3) comprises two mutually meshed reversing gears (31), two reversing chain wheels (32) and a reversing chain (33), one chain wheel (25) of one of the two reel chains (2) needing to be in transmission connection is coaxially connected with one reversing gear (31), one chain wheel (25) of the other of the two reel chains (2) needing to be in transmission connection is coaxially connected with one reversing chain wheel (32), the other reversing gear (31) is coaxially connected with the other reversing chain wheel (32), and the two reversing chain wheels (32) are in transmission connection through the reversing chain (33).

8. Reel-up mechanism according to claim 7, characterized in that the reversing mechanism (3) further comprises an elastic crank tensioning wheel (24) for tensioning the reversing chain (33).

9. A header comprising an ear picking bench (4) and an ear picking roller (5) mounted on the ear picking bench (4), characterized in that the ear picking bench (4) is further mounted with a reel mechanism as claimed in any one of claims 1 to 8, the ear picking roller (5) being located at the rear side of the reel mechanism and providing power thereto.

10. A corn harvester comprising a header as claimed in claim 9.

Technical Field

The invention relates to a reel mechanism, a header containing the reel mechanism and a corn harvester, and belongs to the technical field of agricultural machinery.

Background

On the header of the existing corn harvester, the transmission mode of the reel chains at two sides of the conveying channel is that power is transmitted one by one from the snapping rollers, each reel chain needs to extend to the end from the front, so that a plurality of long chains on the header are caused, a driving structure corresponding to each snapping roller needs to be designed on each snapping roller, and in a limited space, the driving structure is densely arranged, is difficult to assemble and is easy to damage.

The difficulty in solving the problems is that crops need to pass through the middle of the conveying channels, no structure can be arranged, and the conveying of the crops is prevented from being blocked, so that special transmission structures can be arranged at the gaps between the adjacent conveying channels, the transmission mode of the reel chain is changed, the number of long chains is reduced, and the problems are solved.

Disclosure of Invention

The invention aims to solve the technical problem of providing a reel mechanism, a header containing the reel mechanism and a corn harvester, and the reel mechanism is designed by starting from a conveying channel close to two sides, a scheme that a driven chain is driven and linked by an adjacent driving chain is designed, the number of long chains is reduced by optimizing a reel chain and a transmission mode of the reel chain, a part of long chains is changed into short chains at the front end and are driven by adjacent long chains, so that the number of the long chains driven by a snapping roll is reduced, the number of required driving structures is also reduced, reasonable assembly can be realized in a limited space, and the problems are solved.

The technical scheme for solving the technical problems is as follows: a reel mechanism comprises at least two conveying channels arranged side by side, reel chains are arranged on two sides of each conveying channel respectively, the conveying channels are divided into two groups by taking a gap between the two conveying channels as a boundary line or are all divided into one group by taking a side end as a boundary line, the reel chain on one side, close to the boundary line, of each conveying channel is a driven chain, the reel chain on one side, far away from the boundary line, of each conveying channel is a driving chain, the driving chains respectively extend from front to back along the corresponding conveying channels, the rear ends of the driving chains are used for power input, the driven chains are arranged at the front ends of the corresponding conveying channels, and except the driven chains on the boundary line, the other driven chains are in transmission connection with the driving chains of the adjacent conveying channels through a reversing mechanism.

The invention has the beneficial effects that: the reversing mechanism is arranged in the gap between the adjacent conveying channels, so that the driving chain of one conveying channel can transmit power to the driven chain of the adjacent conveying channel, the driven chain does not need to extend to the rear to be connected with the snapping roller through the driving structure, the number of long chains can be reduced on the premise of not influencing the normal conveying of crops by the conveying channels, approximately half of the reel chains only need to be arranged at the front ends of the corresponding conveying channels and are driven by other reel chains, and reasonable assembly can be realized in a limited space. And the requirement of feeding can be satisfied in the group of driving chain, and it is smooth to only can also make transfer passage rear end one side at the driven chain of front end, and the feeding is more smooth and easy.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the conveying channel is in a group by taking one side end as a boundary, and the driven chain at the boundary extends backwards and is used for power input.

The advantage of adopting the above further scheme is that the reel chains of all the conveying channels can be uniformly arranged, the reel chain close to one side is a driven chain, the reel chain far away from one side is a driving chain, and one driving chain and one driven chain at the end parts of the two ends are both in a mode of extending backwards to form a long chain so as to obtain power input.

Further, the conveying channels are divided into two groups by taking a gap between the two conveying channels as a boundary, and the two driven chains at the boundary extend backwards and are used for power input.

The beneficial effect of adopting the above further scheme is that all the conveying channels can be divided into boundary lines by adopting a mode of separately arranging left and right sides, the driving chains of the conveying channels on two sides drive the driven chains of the adjacent conveying channels on one side far away from the boundary lines, the two driving chains at the end parts of two ends are respectively used for obtaining power input by adopting a mode of extending backwards to form long chains, and the two driven chains at the boundary lines can also be used for obtaining power input by adopting a mode of extending backwards to form long chains.

Further, the conveying channels are divided into two groups by taking a gap between the two conveying channels as a boundary, and one of the two driven chains at the boundary extends backwards for power input and is in transmission connection with the other driven chain through a reversing mechanism.

The beneficial effect who adopts above-mentioned further scheme is that the mode that sets up separately left and right sides with all transfer passage adoption, divide with the boundary line, the driving chain of the transfer passage of both sides drives the driven chain of keeping away from adjacent transfer passage on boundary line one side, two driving chains at both ends tip all adopt the mode that extends backward into the long chain in order to obtain power input, two driven chains in boundary line department can select the mode that extends backward into the long chain in order to obtain power input, another then is driven by it and rotates, reduce the quantity of a long chain again than above-mentioned technical scheme like this, the space that needs to occupy at the rear end still less, structural arrangement can be more reasonable.

Further, the driven chain and the driving chain are both double-chain structures and are provided with tensioning devices.

Furthermore, the tensioning device of the driven chain is an elastic crank tensioning wheel, and the tensioning device of the driving chain is a spring tensioning wheel.

The reel chain has a double-chain structure and is provided with the tensioning device, and the reel chain adopts two different tensioning devices, namely a spring tensioning wheel for a driving chain and an elastic crank tensioning wheel for a driven chain, and if the driven chain needs to extend backwards, the two elastic crank tensioning wheels can be respectively arranged at the front and the back for tensioning.

Furthermore, the reel chains comprise at least two chain wheels and a driving chain connected with the chain wheels, the reversing mechanism comprises two mutually meshed reversing gears, two reversing chain wheels and a reversing chain, one chain wheel of one of the two reel chains needing to be in transmission connection is coaxially connected with one reversing gear, one chain wheel of the other of the two reel chains needing to be in transmission connection is coaxially connected with one reversing chain wheel, the other reversing gear is coaxially connected with the other reversing chain wheel, and the two reversing chain wheels are in transmission connection through the reversing chain.

The beneficial effects of adopting above-mentioned further scheme are that reversing mechanism still need to make the rotation direction of these two standing grain chains opposite except that will link together adjacent standing grain chain drive, just so can accomplish to rotate from the front to the back at the standing grain chain that corresponds transfer passage one side, pass through the mode that the sprocket drive chain rotated based on current standing grain chain, set reversing mechanism to above-mentioned structure, the structure is comparatively simple, can reform transform on current design.

Further, the reversing mechanism further comprises an elastic crank tensioning wheel for tensioning the reversing chain.

Adopt above-mentioned further scheme's beneficial effect to need tensioning structure in order to keep tensioning also for the switching-over chain, because its length is shorter, it is more suitable to adopt elasticity crank take-up pulley.

The invention also relates to a header, which comprises an ear picking rack and an ear picking roller arranged on the ear picking rack, wherein the ear picking rack is also provided with the seedling shifting mechanism, and the ear picking roller is positioned at the rear side of the seedling shifting mechanism and provides power for the seedling shifting mechanism.

The invention also relates to a corn harvester which comprises the cutting table.

Drawings

Fig. 1 is a top view of a prior art header;

fig. 2 is a top view of a reel mechanism of the prior art;

fig. 3 is a top view of the reel mechanism of embodiment 1 of the present invention;

fig. 4 is a top view of embodiment 3, scheme 1 of the reel mechanism of the present invention;

fig. 5 is a top view of embodiment 3, scheme 2 of the reel mechanism of the present invention;

fig. 6 is a top view of embodiment 3 of the reel mechanism of the present invention;

FIG. 7 is a top view of the header of the present invention;

fig. 8 is a front view of the header of the present invention (omitting the reel chains and the reversing chains for easy understanding);

fig. 9 is a schematic diagram of an oblique view structure of the header of the present invention (the reel chains and the reversing chains are simplified for easy understanding).

In the drawings, the components represented by the respective reference numerals are listed below:

1. conveying channel, 2, reel chain, 21, driven chain, 22, driving chain, 23, spring tensioning wheel, 24, elastic crank tensioning wheel, 25, chain wheel, 26, driving chain, 3, reversing mechanism, 31, reversing gear, 32, reversing chain wheel, 33, reversing chain, 4, ear picking rack, 5 and ear picking roller.

Detailed Description

The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

As shown in fig. 1 and 2, in the prior art, all the reel chains 2 on both sides of the reel mechanism and the conveying channel 1 on the header are not divided into a driving chain and a driven chain, extend from the front end to the last, and are in transmission connection with the snapping rolls 5 mounted on the snapping bench 4, so that more long chains are on the header, and the snapping rolls 5 are also required to be provided with driving structures corresponding to the snapping rolls one by one, so that the driving structures are densely arranged, and the snapping rolls 5 are too numerous in structure, difficult to assemble and easy to damage.

As shown in fig. 3-6, the invention relates to a reel mechanism, comprising at least two side-by-side conveying channels 1, reel chains 2 are respectively arranged on two sides of each conveying channel 1, the conveying channels 1 are divided into two groups by taking a gap between two conveying channels 1 as a boundary line or are all divided into one group by taking one side end as a boundary line, the reel chain 2 of each conveying channel 1 close to one side of the boundary line is a driven chain 21, the reel chain 2 far away from one side of the boundary line is a driving chain 22, the driving chains 22 respectively extend from front to back along the corresponding conveying channel 1, the rear end of the driven chain 21 is used for power input, the driven chain 21 is arranged at the front end of the corresponding conveying channel 1, except the driven chain 21 at the boundary, the other driven chains 21 are in transmission connection with the driving chain 22 of the adjacent conveying channel 1 through the reversing mechanism 3.

According to the invention, the reversing mechanism 3 is arranged by utilizing the gap between the adjacent conveying channels 1, so that the driving chain 22 of one conveying channel 1 can transmit power to the driven chain 21 of the adjacent conveying channel 1, and the driven chain 21 does not need to extend to the rear to be connected with the snapping roller 5 through the driving structure, and on the premise of not influencing the normal conveying of crops by the conveying channel 1, the number of long chains can be reduced, so that nearly half of the reel chains 2 only need to be arranged at the front end of the corresponding conveying channel and driven by other reel chains 2, and reasonable assembly can be realized in a limited space. And the stirring and sending of the driving chain 22 can meet the feeding requirement, and the driven chain 21 at the front end can enable one side of the rear end of the conveying channel 1 to be smooth, so that the feeding is smoother.

Based on this infrastructure, the present invention has the following various embodiments.

Example 1:

as shown in fig. 3, the conveying path 1 is defined by a set of one side end, and the driven chain 21 at the defined line extends rearward for power input. That is, all conveying channels 1 are arranged side by side in the same mode, the reel chains 2 of all conveying channels 1 are uniformly arranged, the reel chain 2 close to one side is a driven chain 21, the reel chain 2 far away from one side is a driving chain 22, the driving chain 21 drives the driven chain 21 of the adjacent conveying channel 1, and the driving chain 22 and the driven chain 21 at the end parts of two ends are both extended backwards to form a long chain so as to obtain power input.

For example, as shown in fig. 3, the reel mechanism has two conveying paths 1. Compared with the prior art, the driving structure at the snapping roll 5 is one less, and the structural design and assembly are more convenient. If the number of the conveyance paths 1 is larger, they may be arranged side by side in sequence on the basis of the structure of fig. 3.

Example 2

The conveying channels 1 are divided into two groups by taking a gap between two conveying channels 1 as a boundary, and two driven chains 21 at the boundary extend backwards and are used for power input. That is, all the conveying channels 1 are divided into two parts by a boundary line, the driving chains 22 of the conveying channels 1 on both sides drive the driven chains 21 of the adjacent conveying channels 1 on the side far from the boundary line, the two driving chains 22 on both ends extend backwards to form long chains to obtain power input, and the two driven chains 21 on the boundary line can also extend backwards to form long chains to obtain power input. Compared with the unilateral structure of the embodiment 1, the embodiment has the structure that the middle two driven chains 21 are opposite, the reasonability of the arrangement angle of each conveying channel 1 can be kept, and the overall structure is more symmetrical.

Example 3

As shown in fig. 4-6, the conveying channels 1 are divided into two groups by taking the gap between two conveying channels 1 as a boundary, and one of the two driven chains 21 at the boundary extends backwards for power input and is in transmission connection with the other through a reversing mechanism 3. The two driving chains 22 at the end parts of the two ends are input with power in a mode of extending backwards into long chains, one of the two driven chains 21 at the boundary line can be input with power in a mode of extending backwards into long chains, and the other driven chain is driven to rotate by the two driven chains 21. This reduces the number of long chains compared to example 2, requires less space at the rear end, and the structural arrangement can be more reasonable and is the best solution.

It will be appreciated that one of the driven chains 21 of the two conveyors 1 at the boundary is long, the other driven chain 21 and all the other driven chains 21 of the conveyors 1 are short, and the number of long chains can be reduced by nearly half compared with the prior art in which all the driven chains are long.

The embodiment 3 comprises the following three technical schemes:

scheme 1: as shown in fig. 4, three conveying channels 1 are included, wherein a boundary line is formed between two adjacent conveying channels 1, and another conveying channel 1 is located on the other side of one conveying channel 1. In the scheme, 6 reel chains 2 are provided, wherein only 4 long-chain structures are provided, and 2 long-chain structures are only needed to be set as short chains at the front end and do not need to be linked with the snapping roll 5 at the rear end.

Scheme 2: as shown in fig. 5, the conveying device comprises four conveying channels 1, two adjacent conveying channels 1 in the middle are defined by a boundary, and the other two conveying channels 1 are respectively positioned at two sides of the two conveying channels 1. Based on the harvesting environment of the current corn harvester and other similar harvesters, four conveying channels 1 are generally enough for harvesting crops, and on the basis, the preferable scheme is that two sides of two conveying channels 1 forming a boundary line are respectively provided with one conveying channel 1 and 8 reel chains 2 in total, wherein only 5 long-chain structures are provided, 3 long-chain structures are only required to be provided as short chains at the front end, and the rear end is not required to be linked with a snapping roll 5.

Scheme 3: as shown in fig. 6, the conveying device comprises five conveying channels 1, wherein a boundary line is formed between two adjacent conveying channels 1, another conveying channel 1 is positioned on one side of the two conveying channels 1, and the rest two conveying channels are positioned on the other side of the two conveying channels. In the scheme, 10 reel chains 2 are provided, wherein only 6 long-chain structures are provided, 4 long-chain structures are only needed to be set as a short chain at the front end, and linkage with the snapping roll 5 at the rear end is not needed.

On the basis of the above embodiments, the driven chain 21 and the driving chain 22 are both double-chain structures, and both are provided with tensioning devices.

Preferably, the tensioning device of the driven chain 21 is an elastic crank tensioning wheel 24, and the tensioning device of the driving chain 22 is a spring tensioning wheel 23.

The reel chain 2 is a double chain structure and is provided with a tension device, which belongs to the prior art, but the invention adopts two different tension devices, namely a spring tension wheel 23 aiming at the driving chain 22 and an elastic crank tension wheel 24 aiming at the driven chain 21, if the driven chain 21 needs to extend backwards, two elastic crank tension wheels 24 can be respectively arranged at the front and the back for tension.

The specific structures of the spring tension pulley 23 and the elastic crank tension pulley 24 are shown in the figures, which belong to the prior art, and the invention will not be described herein.

On the basis of the above embodiments, the reeling chain 2 includes at least two chain wheels 25 and a driving chain 26 connected to the chain wheels 25, the reversing mechanism 3 includes two mutually meshed reversing gears 31, two reversing chain wheels 32 and a reversing chain 33, one of the chain wheels 25 of one of the two reeling chains 2 to be in transmission connection is coaxially connected with one of the reversing gears 31, one of the chain wheels 25 of the other of the two reeling chains 2 to be in transmission connection is coaxially connected with one of the reversing chain wheels 32, the other of the reversing gears 31 is coaxially connected with the other of the reversing chain wheels 32, and the two reversing chain wheels 32 are in transmission connection through the reversing chain 33.

As shown in fig. 5 and 8, the reversing mechanism 3 is configured to have the above structure based on the manner that the existing reel chains 2 drive the driving chains 26 to rotate through the chain wheels 25, and the reversing mechanism 3 is simple in structure and can be modified in the existing design.

The long chain structure of the reel chain 2 belongs to the prior art, if the reel chain 2 is a straight line type, the front end and the rear end are respectively provided with a chain wheel 25 and sleeved with a driving chain 26, for example, the driving chains 22 at the two side edges in each drawing, if a certain bending angle needs to be set, the front end, the middle part and the rear end can be respectively provided with a chain wheel 25 and sleeved with a driving chain 26, for example, the driving chain 22 at the middle in each drawing. The short chain structure of the reel chain 2 is a linear reel chain 2 formed at the front end of a bending angle, and the front end and the middle part are respectively provided with a chain wheel 25 which is sleeved with a driving chain 26. More particularly, in some schemes, one of the driven chains 21 needs to extend backward, and is different from a long chain structure, and is divided into a front section and a rear section, the front section is consistent with other short chain structures, the rear short chain is a middle section and a rear end, and is respectively provided with a chain wheel 25 and sleeved with an additional driving chain 26, and the middle chain wheel 25 is used for transmission, so that the power of the rear end is transmitted to the front end. The driving chain 26 is also provided with a seedling poking protrusion for poking crops.

In particular, one of the reversing gears 31 can be coaxially connected below the middle chain wheel 25 of one of the two reel chains 2 which need to be connected in a transmission way, and the other reversing gear 31 is meshed with the middle chain wheel, so that in order to avoid influencing the conveying of the crops in the conveying channel 1, another reversing gear 31 may be disposed in the gap of the adjacent conveying path 1, and coaxially connected with one of the reversing sprockets 32, another reversing chain wheel 32 is coaxially connected below the middle chain wheel 25 of the other of the two reel chains 2 which need to be connected in a transmission way, the reversing chain 33 bypasses the two reversing chain wheels 32 (an integral linkage structure is formed, the two reversing gear wheels 31 synchronously and reversely rotate to realize the rotation of the reversing chain 33, so that the reversing chain wheels 32 are driven to rotate), the transmission connection of the middle chain wheels 25 of the two reel chains 2 is realized, the rotating directions are opposite, and the crop conveying effect of the conveying channel 1 is met.

Preferably, the reversing mechanism 3 further includes an elastic crank tensioning wheel for tensioning the reversing chain 33. The reversing chain 33 also requires a tensioning arrangement to maintain tension, and due to its short length, it is appropriate to use a resilient crank tensioner.

As shown in fig. 8 and 9, the invention further relates to a cutting table, which comprises an ear picking rack 4 and an ear picking roller 5 arranged on the ear picking rack 4, wherein the ear picking rack 4 is also provided with the reel mechanism, and the ear picking roller 5 is positioned at the rear side of the reel mechanism and provides power for the reel mechanism. Other structures on the header, the snapping rack 4 and the snapping roller 5 belong to the prior art, a driving structure on the snapping roller 5 also belongs to the prior art, the invention aims to reduce the number of the snapping rack and ensure that the mounting space is enough, and the specific structure of the snapping rack is not described in detail herein.

The invention also relates to a corn harvester which comprises the cutting table. Besides, if the harvester for other crops involves the corresponding conveying channel 1 and the reel chain 2, the reel mechanism can also be adopted, and the harvester belongs to the protection scope of the invention.

In the description of the present invention, it is to be understood that the terms "middle", "two sides", "upper", "lower", "front", "rear", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "fixed," "drive-connected," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the terms "embodiment," "scheme," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.