阅读说明：本技术 一种卷烟包装薄膜拆解装置 (Cigarette packaging film disassembling device ) 是由 郭得敏 景浩 熊巍 卫民 罗亚 于 2020-06-18 设计创作，主要内容包括：本发明公开一种卷烟包装薄膜拆解装置,包括：薄膜拆解组件：为长方体框架结构,包括多根切割丝,所述多根切割丝连接于至少一个电回路中；支撑组件：用于固定所述长方体框架结构。本发明卷烟包装薄膜拆解装置,在操作时不会划伤手部、不会破坏卷烟条盒、小盒上的包装工艺特征以及印刷和防伪技术信息,安全、准确、便捷。(The invention discloses a cigarette packaging film disassembling device, which comprises: film disassembling assembly: the cutting device is of a cuboid frame structure and comprises a plurality of cutting wires, and the cutting wires are connected in at least one electric loop; a support component: for fixing the cuboid frame structure. The disassembling device for the cigarette packaging film does not scratch hands, does not damage packaging process characteristics and printing and anti-counterfeiting technical information on cigarette cartons and small boxes, and is safe, accurate and convenient.)

1. A cigarette packaging film disassembling device is characterized by comprising:

film disassembling assembly: the cutting device is of a cuboid frame structure and comprises a plurality of cutting wires, and the cutting wires are connected in at least one electric loop;

a support component: for fixing the cuboid frame structure.

2. The cigarette packaging film disassembling apparatus according to claim 1, wherein a side length of the rectangular parallelepiped frame structure is adjustable.

3. The cigarette packaging film disassembling device of claim 1, wherein the cutting wire is a heating resistance wire.

4. The cigarette packaging film dismantling device of claim 2, wherein said support assembly includes a platform and a control box mounted on said platform; the platform is provided with two parallel first sliding grooves, the control box is provided with two mounting holes, the mounting holes are positioned on an extension line of the first sliding grooves, the control box is provided with two parallel second sliding grooves, and the second sliding grooves are positioned right above the mounting holes; further comprising:

a first support bar: the first supporting rod is assembled in the first sliding groove in a sliding mode, and one end of the first supporting rod is installed in the control box through the installation hole;

a second support bar: the lower end of the second supporting rod is fixedly connected with the first supporting rod;

a third supporting rod: one end of the third supporting rod is assembled in the second sliding groove in a sliding mode, and the other end of the third supporting rod is in sliding fit with the second supporting rod.

5. The cigarette packaging film dismantling device of claim 4, wherein a first support bar driving device and a third support bar driving device are installed in the control box.

6. The cigarette packaging film disassembling device according to claim 4, wherein the first support rod, the second support rod or/and the third support rod are provided with right-angled grooves, and cutting wires are installed in the right-angled grooves.

7. The cigarette packaging film dismantling device of claim 4, 5 or 6, wherein the rectangular parallelepiped frame structure comprises a first cutting unit and a second cutting unit, the first cutting unit and the second cutting unit being connected in parallel in the same electric circuit;

the first cutting unit comprises a first cutting wire, a second cutting wire, a third cutting wire and a fourth cutting wire, the first cutting wire is parallel to the second cutting wire, the third cutting wire is parallel to the fourth cutting wire, two ends of the third cutting wire are respectively in sliding connection with the first cutting wire and the second cutting wire through cutting wire connecting rings, and two ends of the fourth cutting wire are respectively in sliding connection with the first cutting wire and the second cutting wire through cutting wire connecting rings; the first cutting wire and the second cutting wire are both provided with circuit connecting ends;

the second cutting unit comprises a fifth cutting wire, a sixth cutting wire, a seventh cutting wire and an eighth cutting wire, the fifth cutting wire is parallel to the sixth cutting wire, the seventh cutting wire is parallel to the eighth cutting wire, two ends of the seventh cutting wire are respectively in sliding connection with the fifth cutting wire and the sixth cutting wire through cutting wire connecting rings, and two ends of the eighth cutting wire are respectively in sliding connection with the fifth cutting wire and the sixth cutting wire through cutting wire connecting rings; the fifth cutting wire and the sixth cutting wire are both provided with circuit connecting ends.

8. The cigarette packaging film disassembling device according to claim 7, wherein the first cutting wire comprises a vertical section and a circuit connecting section, the second cutting wire comprises a vertical section and a circuit connecting section, and the first cutting wire vertical section, the second cutting wire vertical section, the third cutting wire and the fourth cutting wire are attached to the outer surface of the control box; the fourth cutting wire and the eighth cutting wire are attached to the surface of the platform.

9. The cigarette packaging film disassembling device according to claim 7, wherein a first cutting wire winding and unwinding device, a second cutting wire winding and unwinding device, a fifth cutting wire winding and unwinding device and a sixth cutting wire winding and unwinding device are installed in the control box.

10. The cigarette packaging film disassembling device according to claim 3, wherein the heating resistance wire is one of a steel wire, a nichrome wire, and a pure nickel wire.

Technical Field

The invention belongs to the field of cigarette sample inspection and detection equipment, and relates to a cigarette packaging film disassembling device.

Background

Before cigarettes are marketed, corresponding packs, most commonly a pack of 20 cigarettes, a pack of 10 cigarettes and a pack of 50 cigarettes, are required. The cigarette quality stabilizer is used for ensuring the stable quality of cigarettes in the processes of transportation, storage, sale and the like, and can also play a role in beautifying and publicizing and facilitating the identification of consumers.

In the process of cigarette quality supervision and inspection and detection, in order to ensure that various indexes of cigarette strips, cigarette boxes, cigarettes and tobacco shreds meet standards and requirements, the films of the cigarette strips and cigarette boxes need to be disassembled so as to conveniently inspect and detect the cigarettes from outside to inside and from outside to inside, and further obtain clear conclusions.

Generally, when a tobacco quality supervision, inspection and detection mechanism supervises and detects the quality of cigarettes, a common cutter directly cuts a packaging film of a cigarette carton and a small box package, and the simple and direct operation is easy to scratch hands, and can damage packaging process characteristics and printing and anti-counterfeiting technical information on the cigarette carton and the small box to different degrees, so that the quality supervision, inspection and detection work is not facilitated.

In order to protect the packaging information such as original branding, original printing and the like, the tobacco quality supervision, inspection and detection mechanism in Jiangsu province and the like determines the requirements of disassembly from certain angles and the like on the packaging film for disassembling the cigarette carton and the small box package by using a cutter and the like, and makes detailed requirements for protecting the original branding, the original printing and the like, but does not fundamentally solve the problems of scratching hands or damaging the packaging process characteristics on the cigarette carton and the small box, printing, anti-counterfeiting technical information and the like.

In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:

1. the prior art lacks special equipment for disassembling the packaging film.

2. In the process of disassembling the packaging film of the cigarette carton and the small box package, the packaging film and the packaging box are damaged, and the information such as the packaging process characteristics, the printing technology, the anti-counterfeiting technology and the like cannot be reserved.

3. Is not beneficial to the standardization of quality supervision and inspection and detection work.

Disclosure of Invention

In view of this, the present invention aims to provide a packaging film dismantling device, which can maintain complete packaging information, has the characteristics of safety, accuracy and convenience, and can not scratch hands, damage packaging process characteristics on cigarette cartons and small boxes, and print and anti-counterfeiting technical information during operation.

The inventor provides a technical scheme for solving the technical problems by continuous innovation through long-term exploration and trial and multiple experiments and endeavors, and the technical scheme is that the invention provides a disassembling device for cigarette packaging films, which comprises:

film disassembling assembly: the cutting device is of a cuboid frame structure and comprises a plurality of cutting wires, and the cutting wires are connected in at least one electric loop;

a support component: for fixing the cuboid frame structure.

According to a further embodiment of the disassembling device for the cigarette packaging film, the side length of the rectangular frame structure can be adjusted.

According to a further embodiment of the disassembling device for the cigarette packaging film, the cutting wire is a heating resistance wire.

According to a further embodiment of the disassembling device for cigarette packaging films, the supporting assembly comprises a platform and a control box arranged on the platform; the platform is provided with two parallel first sliding grooves, the control box is provided with two mounting holes, the mounting holes are positioned on an extension line of the first sliding grooves, the control box is provided with two parallel second sliding grooves, and the second sliding grooves are positioned right above the mounting holes; further comprising:

a first support bar: the first supporting rod is assembled in the first sliding groove in a sliding mode, and one end of the first supporting rod is installed in the control box through the installation hole;

a second support bar: the lower end of the second supporting rod is fixedly connected with the first supporting rod;

a third supporting rod: one end of the third supporting rod is assembled on the second sliding groove in a sliding mode, and the other end of the third supporting rod is in sliding fit with the second supporting rod.

According to a preferred embodiment of the disassembling device for cigarette packaging films, a first supporting rod driving device and a third supporting rod driving device are installed in the control box.

According to a preferred embodiment of the disassembling device for the cigarette packaging film, the first support rod, the second support rod or/and the third support rod are/is provided with a right-angle groove, and a cutting wire is arranged in the right-angle groove.

According to a further embodiment of the disassembling device for cigarette packaging films, the rectangular frame structure comprises a first cutting unit and a second cutting unit, and the first cutting unit and the second cutting unit are connected in parallel in the same electric circuit;

the first cutting unit comprises a first cutting wire, a second cutting wire, a third cutting wire and a fourth cutting wire, the first cutting wire is parallel to the second cutting wire, the third cutting wire is parallel to the fourth cutting wire, two ends of the third cutting wire are respectively in sliding connection with the first cutting wire and the second cutting wire through cutting wire connecting rings, and two ends of the fourth cutting wire are respectively in sliding connection with the first cutting wire and the second cutting wire through cutting wire connecting rings; the first cutting wire and the second cutting wire are both provided with circuit connecting ends;

the second cutting unit comprises a fifth cutting wire, a sixth cutting wire, a seventh cutting wire and an eighth cutting wire, the fifth cutting wire is parallel to the sixth cutting wire, the seventh cutting wire is parallel to the eighth cutting wire, two ends of the seventh cutting wire are respectively in sliding connection with the fifth cutting wire and the sixth cutting wire through cutting wire connecting rings, and two ends of the eighth cutting wire are respectively in sliding connection with the fifth cutting wire and the sixth cutting wire through cutting wire connecting rings; the fifth cutting wire and the sixth cutting wire are both provided with circuit connecting ends.

According to a preferred embodiment of the disassembling device for the cigarette packaging film, the first cutting wire comprises a vertical section and a circuit connecting section, the second cutting wire comprises a vertical section and a circuit connecting section, and the vertical section of the first cutting wire, the vertical section of the second cutting wire, the third cutting wire and the fourth cutting wire are attached to the outer surface of the control box; the fourth cutting wire and the eighth cutting wire are attached to the surface of the platform.

According to a preferred embodiment of the disassembling device for the cigarette packaging film, a first cutting wire winding and unwinding device, a second cutting wire winding and unwinding device, a fifth cutting wire winding and unwinding device and a sixth cutting wire winding and unwinding device are installed in the control box.

According to a preferred embodiment of the disassembling device for the cigarette packaging film, the heating resistance wire is one of a steel wire, a nickel-chromium heating wire, a nickel-chromium alloy wire and a pure nickel wire.

Compared with the prior art, one of the technical solutions has the following advantages:

a) the disassembling device for the cigarette packaging film does not scratch hands, does not damage packaging process characteristics and printing and anti-counterfeiting technical information on cigarette cartons and small boxes, and is safe, accurate and convenient.

b) In one embodiment of the cigarette packaging film disassembling device, cigarette cartons and small box packaging films with different specifications can be disassembled, and high-temperature steel wires are disassembled from corner positions of package of the cigarette cartons and the small box packaging films at fixed positions.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic perspective view of a cigarette packaging film dismantling device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a film dismantling assembly in a preferred embodiment of the cigarette packaging film dismantling device of the present invention.

Fig. 3 is a partial enlarged view of I in fig. 2.

Fig. 4 is a schematic cross-sectional structural view of a driving device in a preferred embodiment of the cigarette packaging film dismantling device of the present invention.

The labels in the figure are respectively: 100 of the platform, the platform is a single platform,

101 of the first slide groove,

200 a control box is arranged in the box body,

201 the second slide groove of the first slide groove,

202 the installation holes of the base plate are arranged,

301 a first support bar is provided which is,

302 a second support bar, which is,

303 of the third support bar are arranged in the first support bar,

411 the first cutting wire is cut in the first cutting wire,

412 a second cutting wire, the second cutting wire,

413 of a third cutting wire, the third cutting wire,

414 of the fourth cutting wire or wires,

421 a fifth cutting wire to be cut,

422 the sixth cutting wire is cut from the first cutting wire,

423 with a seventh cutting wire, and a second cutting wire,

424 the eighth cutting wire or wires,

431 a cutting wire connecting ring,

the block is driven by 12.

Detailed Description

The following description is made with reference to the accompanying drawings and a specific embodiment.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

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, it may not be further defined and explained in subsequent figures.

See fig. 1-3. The cigarette packaging film disassembling device described in this embodiment includes a film disassembling assembly: is a cuboid frame structure and comprises a plurality of cutting wires which are connected in at least one electric loop. Many cutting filaments are located cuboid frame construction's sideline respectively, and correspondingly, many cutting filaments are located each edges and corners department of packing carton respectively. The cutting wire is a heating resistance wire, such as any one of the heating resistance wires in the prior art, such as a steel wire, a nickel-chromium heating wire, a nickel-chromium alloy wire, a pure nickel wire and the like. The invention only selects the heating resistance wire, and does not relate to the improvement of materials. The cutting wire is positioned in the electric circuit, the circuit is electrified, the cutting wire generates heat, the temperature reaches 300 ℃, and then the packaging film can be cut at the corner of the packaging box. The side length of the cuboid frame structure can be fixed or adjustable. Preferably adjustable cuboid frame structure, applicable in the cutting of the not unidimensional packing carton film.

A support component: for supporting and securing the rectangular parallelepiped frame structure. The cutting wire is a thin wire made of a metal material, and the cuboid frame structure is maintained through a supporting component.

This embodiment provides a specific support assembly comprising a platform 100 and a control box 200 mounted on the platform. The platform 100 is horizontally disposed, and the control box 200 is installed on the upper surface of the platform 100 and is perpendicular to the upper surface of the platform 100. The platform 100 is provided with two parallel first sliding grooves 101, the control box 200 is provided with two mounting holes 202, the mounting holes 202 are located on an extension line of the first sliding grooves 101, the control box 200 is provided with two parallel second sliding grooves 201, and the second sliding grooves 201 are located right above the mounting holes. The first sliding groove 101, the mounting hole 202 and the second sliding groove 201 are located in a plane, and the first sliding groove 101, the mounting hole 202 and the second sliding groove 201 are located in two parallel planes.

The support assembly further comprises a first support strut 301: the first support rod 301 is slidably mounted in the first sliding groove 101, and one end of the first support rod 301 is mounted in the control box 200 through the mounting hole 202. The control box 200 is provided with a first support rod driving device, and the first support rod driving device drives the first support rod 301 to reciprocate linearly in the first sliding chute 101. The first support bar driving means may be implemented in various ways, such as a combination of a motor and a gear mechanism, a combination of a motor and a screw mechanism, a cylinder, a hydro-cylinder, and any means that can be used in the prior art. The motor can be a stepping motor or a servo motor.

The support assembly further includes a second support bar 302: the second supporting rod 302 is perpendicular to the first supporting rod 301 and the platform 100, and the lower end of the second supporting rod 302 is fixedly connected with one end of the first supporting rod 302. The lower end of the second support bar 302 is in sliding fit with the first sliding groove 101. The second support bar 302 is driven to slide according to the first support bar 301. The first supporting rod 301 is driven to regulate the distance between the second supporting rod 302 and the control box 200, so that the disassembling device is suitable for the packing boxes with different width sizes.

The support assembly further comprises a third support bar 303: one end of the third support bar 303 is slidably assembled to the second sliding groove 201, and the other end of the third support bar 303 is slidably fitted with the second support bar 303. A third support rod driving device is installed in the control box 200. The length direction line of the second chute 201 is perpendicular to the upper surface of the platform 100. The second sliding groove 201 is matched with the second sliding groove in a sliding manner in the horizontal direction, and the third supporting rod 303 is driven to slide according to the second supporting rod 302. The third supporting rod driving device enables the third supporting rod 303 to slide up and down in the second sliding chute 201, so that the disassembling device is suitable for packaging boxes with different height sizes. The third support bar driving means may be implemented in various ways, such as a combination of a motor and a gear mechanism, a combination of a motor and a screw mechanism, a cylinder, and any means that can be used in the prior art. The motor can be a stepping motor or a servo motor. Referring to fig. 4, the driving device includes a driving block 12, and a through hole is formed in the driving block 12, and the third supporting rod 303 is slidably engaged with the through hole. Under the action of the third supporting rod driving device, the driving block reciprocates up and down in the second sliding chute 201.

In order to improve the safety of the dismounting device, the first support rod 301, the second support rod 302 or/and the third support rod 303 are/is provided with right-angle grooves, and cutting wires are arranged in the right-angle grooves. In this embodiment, the first support rod 301 and the third support rod 303 are provided with right-angle grooves, and cutting wires are installed at right angles of the right-angle grooves. One surface of the right-angle groove of the first support rod 301 is located on the same plane with the upper surface of the platform 100, and the other surface of the right-angle groove of the first support rod 301 is perpendicular to the upper surface of the platform 100. The two first support rods 301 are symmetrically arranged. A necking sliding groove in sliding fit with the third supporting rod 303 is formed in the second supporting rod 302, and a sliding block in sliding fit with the necking sliding groove is arranged at the end of the third supporting rod 303. The throat chute can ensure that the sliding block slides in the throat chute, and meanwhile, when the second supporting rod 302 moves, the third supporting rod 303 can be driven to move in the horizontal direction.

See fig. 2. The cuboid frame structure comprises a first cutting unit and a second cutting unit, and the first cutting unit and the second cutting unit are connected in parallel in the same electric loop.

See fig. 2 and 3. The first cutting unit includes a first cutting wire 411, a second cutting wire 412, a third cutting wire 413, and a fourth cutting wire 414. The first cutting wire 411 and the second cutting wire 412 are both provided with a circuit access end, the first cutting wire 411 comprises a vertical section and a circuit connection section, and the second cutting wire 412 comprises a vertical section and a circuit connection section. The first cutting wire vertical section, the second cutting wire vertical section, the third cutting wire 413 and the fourth cutting wire 414 are attached to the outer surface of the control box. The first cutting wire 411 is parallel to the second cutting wire 414, the third cutting wire 412 is parallel to the fourth cutting wire, and two ends of the third cutting wire are respectively connected with the first cutting wire 411 and the second cutting wire 412 in a sliding manner through a cutting wire connecting ring 431. The wire attachment ring 431 is a metal ring where the wire attachment ring 431 is slidably mounted within a right angle groove of the third support bar.

Both ends of the fourth cutting wire 414 are slidably connected with the first cutting wire 411 and the second cutting wire 412 through cutting wire connection rings 431, respectively. The two ends of the fourth cutting wire 414 may also be fixedly connected with the first cutting wire 411 and the second cutting wire 412. When the two ends of the fourth cutting wire 414 are also fixedly connected with the first cutting wire 411 and the second cutting wire 412, the lower ends of the first cutting wire 411 and the second cutting wire 412 are fixed, the upper ends of the first cutting wire 411 and the second cutting wire 412 are raised according to the third supporting rod 303 to be released, and the upper ends of the first cutting wire 411 and the second cutting wire 412 are lowered according to the third supporting rod 303 to be taken up. In order to facilitate wire winding and unwinding, a first cutting wire winding and unwinding device and a second cutting wire winding and unwinding device are installed in the control box, and the first cutting wire winding and unwinding device and the second cutting wire winding and unwinding device adopt winch structure devices.

The second cutting unit comprises a fifth cutting wire 421, a sixth cutting wire 422, a seventh cutting wire 423 and an eighth cutting wire 424, the fifth cutting wire 421 is parallel to the sixth cutting wire 422, the seventh cutting wire 423 is parallel to the eighth cutting wire 424, two ends of the seventh cutting wire 423 are respectively connected with the fifth cutting wire 421 and the sixth cutting wire 422 through cutting wire connecting rings 431 in a sliding manner, and two ends of the eighth cutting wire 424 are respectively connected with the fifth cutting wire 421 and the sixth cutting wire 422 through cutting wire connecting rings 431 in a sliding manner; the fifth cutting wire 421 and the sixth cutting wire 423 are both provided with circuit connection ends. The second cutting unit is arranged in the same structure as the first cutting unit, but the supporting structure is different. The second cutting unit is remote from the control box 200. A fifth cutting wire winding and unwinding device and a sixth cutting wire winding and unwinding device are installed in the control box, and the fifth cutting wire winding and unwinding device and the sixth cutting wire winding and unwinding device adopt winch structure devices.

For improving the security, install a baffle in the second bracing piece outside, prevent that the cutting silk from exposing, cause unexpected scald to measurement personnel.

The cigarette packaging film disassembling device is a safe and rapid tool for carrying out cigarette quality supervision and inspection detection, can effectively prevent inspectors from being scratched when the cigarette packaging film is disassembled, and has important significance for retaining original packaging process characteristics on cigarette cartons and small boxes and printing and anti-counterfeiting technical information. At present, with the deep and effective promotion of cigarette smuggling and counterfeit work, the annual inspection and detection number of tobacco quality supervision inspection and detection mechanisms in each province of China is continuously increased, the task load of disassembling cigarette cartons and small box packaging films is more and more serious, the current common cutter direct disassembling mode is difficult to avoid scratching inspection personnel, packaging process characteristics, printing and anti-counterfeiting technical information and the like on the cigarette cartons and the small boxes are easy to damage, and the disassembling efficiency is low.

The cigarette packaging film disassembling device has the advantages of safety, high efficiency, time and labor saving and the like. The main method is that the edges and corners of the packing film are instantaneously cut by a heating steel wire (at the temperature of 300 ℃) in the process that the cigarettes pass through a fixed track, so that the packing process characteristics and the printing and anti-counterfeiting technical information on a barrel and a small box are not damaged and the original shape is kept when the cigarette packing film is disassembled.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are used in the orientations and positional relationships indicated in the drawings, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the interconnection of two elements or through the interaction of two elements. 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, "above" or "below" a first feature means that the first and second features are in direct contact, and that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.