阅读说明：本技术 一种罩杯切割设备 (Cup cutting equipment ) 是由 郑涛 鲍芳 于 2020-11-30 设计创作，主要内容包括：本发明属于内衣生产设备领域,公开了一种罩杯切割设备,其包括：设置在固定基础上的工作台,工作台上用于放置待切割的罩杯成型海绵；设置在工作台的上方的施压机构,施压机构的施压端能够在驱动装置的驱动下沿竖直方向上下移动；以及可脱离地放置于工作台上的切割刀组件,切割刀组件至少包括一个环形刀具,环形刀具的刀刃朝向下方设置。其中,环形刀具构造为竖直板环形结构,环形刀具围成的切割轮廓构造为与待切割的罩杯轮廓相同。本发明的罩杯切割设备能够提高生产效率的同时,结构简单,降低企业的生产成本。(The invention belongs to the field of underwear production equipment, and discloses cup cutting equipment, which comprises: the worktable is arranged on the fixed foundation and is used for placing cup molding sponge to be cut; the pressing end of the pressing mechanism can move up and down along the vertical direction under the driving of the driving device; and the cutter assembly is detachably arranged on the workbench and at least comprises an annular cutter, and the cutting edge of the annular cutter faces downwards. Wherein, annular cutter structure is vertical board annular structure, and the cutting profile structure that annular cutter encloses is the same with the cup profile that waits to cut. The cup cutting equipment provided by the invention has the advantages that the production efficiency can be improved, the structure is simple, and the production cost of an enterprise is reduced.)

1. A cup cutting apparatus, comprising: the worktable is arranged on a fixed foundation and is used for placing cup forming sponge to be cut; the pressing mechanism is arranged above the workbench, and a pressing end of the pressing mechanism can move up and down in the vertical direction under the driving of the first driving device; and the cutter assembly is detachably arranged on the workbench and at least comprises an annular cutter, the cutting edge of the annular cutter is arranged downwards, the annular cutter is of a vertical plate annular structure, and the cutting profile surrounded by the annular cutter is the same as the profile of a cup to be cut.

2. A cup cutting apparatus as claimed in claim 1, wherein said cutter assembly includes two said annular cutters symmetrically disposed and interconnected, the distance between the centers of the two annular cutters being set equal to the distance between the centers of the left and right cups on the cup-forming sponge.

3. A cup cutting apparatus as claimed in claim 2, wherein said vertical plate loop structure is made of a metallic material.

4. A cup cutting apparatus according to any one of claims 1 to 3, wherein the table includes a base on which the cup-forming sponge to be cut is placed and a moving table provided on the base, the pressure applying mechanism being fixed on the base and located above the moving table, wherein the moving table is arranged to be horizontally movable between a proximal end and a distal end under the influence of an external force.

5. A cup cutting device as claimed in claim 4, wherein the pressure applying mechanism includes a supporting frame fixedly connected with the base and a first telescopic mechanism vertically arranged on the supporting frame, one end of the first telescopic mechanism facing the workbench is fixedly connected with a horizontal pressure applying plate, and the horizontal pressure applying plate can apply pressure to and separate from the cutter assembly under the driving of the first telescopic mechanism.

6. A cup cutting device as claimed in claim 5, wherein the horizontal pressing plate includes two plate portions symmetrically disposed and connected to each other, the pressing mechanism further includes a pressing rod mechanism disposed between the two plate portions, the pressing rod mechanism includes a horizontal pressing rod elastically connected to the first telescoping mechanism perpendicular to the telescoping direction of the first telescoping mechanism, the length direction of the horizontal pressing rod is parallel to the moving direction of the moving table, and the horizontal pressing rod is disposed to pre-press the cutting knife before the horizontal pressing plate under the driving of the first telescoping mechanism.

7. A cup cutting device as claimed in claim 5, wherein said horizontal pressing plate includes two plate portions disposed in bilateral symmetry and connected to each other, said pressing mechanism further includes a pressing rod mechanism disposed between the two plate portions, said pressing rod mechanism includes a second driving device disposed on said moving table and a horizontal pressing rod connected to said second driving device and having a length direction parallel to a moving direction of said moving table, said second driving device is used for driving said horizontal pressing rod to move up and down in a vertical direction to disengage and press said cutting knife.

8. A cup cutting apparatus according to claim 6 or 7, wherein the compression bar mechanism further includes a second telescoping mechanism fixed to the support frame and connected to the horizontal compression bar for driving the horizontal compression bar to telescope in a horizontal direction.

9. A cup cutting device as claimed in claim 8, wherein the pressure applying mechanism further includes a pre-pressing mechanism, the pre-pressing mechanism includes a third telescoping mechanism fixed on the side wall of the support frame and a vertical pressing rod connected to the third telescoping mechanism, the vertical pressing rod is located above the horizontal pressing rod, and the vertical pressing rod can be disengaged from and pressed against the horizontal pressing rod under the driving of the third telescoping mechanism.

10. A cup cutting apparatus according to claim 9, wherein a recess is formed in an end of the vertical strut abutting the horizontal strut and/or a top of the cutter assembly abutting the horizontal strut for receiving the horizontal strut.

Technical Field

The invention belongs to the field of underwear production equipment, and particularly relates to cup cutting equipment.

Background

The underwear is generally composed of an outer layer of cloth and a sponge cup filled in the cloth. A plurality of processing procedures are required in the production process of the underwear, such as cloth gluing in the early stage, primary underwear forming, cloth trimming in the middle stage, cup processing, cup filling in the later stage to underwear forming and the like. Among them, in the process of cup processing, usually process a plurality of cups on the great whole piece sponge of an area, this just needs in follow-up production, need tailor the cup on the whole piece sponge. For smaller enterprises, in order to save cost, the cutting is usually carried out in a manual mode, so that the efficiency is very low, the human factors are more, and the qualification rate of products is usually low; and to using intelligent, mechanized equipment of tailorring, this kind of equipment is higher although can reach more standardized production, its cost, and the structure is complicated, and the fortune dimension cost is higher, still is unfavorable for small-size enterprise's production demand.

Disclosure of Invention

In order to solve all or part of the problems, the invention aims to provide cup cutting equipment, which is simple in structure and capable of improving production efficiency and reducing production cost of enterprises.

The cup cutting apparatus of the present invention comprises: the worktable is arranged on the fixed foundation and is used for placing cup molding sponge to be cut; the pressing end of the pressing mechanism can move up and down along the vertical direction under the driving of the driving device; and the cutter assembly is detachably arranged on the workbench and at least comprises an annular cutter, and the cutting edge of the annular cutter faces downwards. Wherein, annular cutter structure is vertical board annular structure, and the cutting profile structure that annular cutter encloses is the same with the cup profile that waits to cut.

Further, the cutting knife subassembly includes two annular cutters that bilateral symmetry set up and interconnect, and the distance at the center of two annular cutters sets to and cup shaping sponge on the distance at the center of controlling the cup equal.

Further, the vertical plate ring structure is made of a metal material.

Further, the workstation includes the base and sets up the removal mesa on the base, and the cup shaping sponge that treats the cutting is placed on removing the mesa, and the mechanism of exerting pressure is fixed on the base and is located the top that removes the mesa, and wherein, removes the mesa and sets up to can follow horizontal migration between near-end and the distal end under the exogenic action.

Further, the pressing mechanism comprises a support frame fixedly connected with the base and a first telescopic mechanism arranged on the support frame along the vertical direction, one end of the first telescopic mechanism, which faces the workbench, is fixedly connected with a horizontal pressing plate, and the horizontal pressing plate can press and separate the cutting knife assembly under the driving of the first telescopic mechanism.

Further, the horizontal pressing plate comprises two plate parts which are arranged in a bilateral symmetry mode and connected with each other, the pressing mechanism further comprises a pressing rod mechanism arranged between the two plate parts, the pressing rod mechanism comprises a horizontal pressing rod which is perpendicular to the stretching direction of the first stretching mechanism and is elastically connected with the first stretching mechanism, the length direction of the horizontal pressing rod is parallel to the moving direction of the moving table board, and the horizontal pressing rod is arranged to be capable of pre-pressing the cutting knife in advance of the horizontal pressing plate under the driving of the first stretching mechanism.

Further, the horizontal pressing plate comprises two plate parts which are arranged in a bilateral symmetry mode and connected with each other, the pressing mechanism further comprises a pressing rod mechanism arranged between the two plate parts, the pressing rod mechanism comprises a driving device arranged on the moving table board and a horizontal pressing rod which is connected with the driving device and is parallel to the moving direction of the moving table board in the length direction, and the driving device is used for driving the horizontal pressing rod to move up and down along the vertical direction so as to separate from and press the cutting knife.

Furthermore, the pressure lever mechanism also comprises a second telescopic mechanism which is fixed on the support frame and connected with the horizontal pressure lever, and the second telescopic mechanism is used for driving the horizontal pressure lever to stretch along the horizontal direction.

Furthermore, the pressure applying mechanism further comprises a prepressing mechanism, the prepressing mechanism comprises a third telescopic mechanism fixed on the side wall of the support frame and a vertical compression bar connected with the third telescopic mechanism, the vertical compression bar is located above the horizontal compression bar, and the vertical compression bar can be separated from and press the horizontal compression bar under the driving of the third telescopic mechanism.

Furthermore, a groove for accommodating the horizontal compression rod is formed at one end of the vertical compression rod jointed with the horizontal compression rod and/or at the position where the top of the cutting knife assembly is jointed with the horizontal compression rod.

The cup cutting equipment has the following advantages: 1) according to the cup cutting equipment disclosed by the invention, before cutting, the annular cutter is placed at the corresponding cup, then the whole body is placed on the workbench, and the driving device is started to finish the cutting of the cup, so that the cup cutting equipment disclosed by the invention is convenient to use, and the cup production efficiency can be effectively improved; 2) the cup cutting equipment can complete the whole process only by the annular cutter and the pressing mechanism, so that the cup cutting equipment is simple in structure, the production cost of enterprises can be directly reduced for small and medium-sized enterprises, and the cup cutting equipment is suitable for popularization and use.

Drawings

FIG. 1 is a schematic structural view of a cup cutting apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the cup cutting apparatus shown in FIG. 1 without the cutter assembly;

FIG. 3 is a front view of the cup cutting apparatus shown in FIG. 1;

FIG. 4 is a side cross-sectional view of the cup cutting apparatus shown in FIG. 3;

FIG. 5 is a schematic view showing the internal structure of the cup cutting apparatus shown in FIG. 3;

fig. 6 is a schematic structural view of the cutter assembly shown in fig. 1.

Detailed Description

For a better understanding of the purpose, structure and function of the invention, a cup cutting device according to the invention will be described in more detail below with reference to the accompanying drawings.

Fig. 1 to 6 illustrate a structure of a cup cutting apparatus 100 according to an embodiment of the present invention, wherein fig. 1 is a schematic structural view of the cup cutting apparatus 100 according to an embodiment of the present invention; fig. 2 is a schematic view of the structure of the cup cutting device 100 shown in fig. 1 without the cutting knife assembly 3; fig. 3 is a front view of the cup cutting apparatus 100 shown in fig. 1; FIG. 4 is a side cross-sectional view of the cup cutting apparatus 100 shown in FIG. 3; fig. 5 is a schematic view of the internal structure of the cup cutting apparatus 100 shown in fig. 3; fig. 6 is a schematic structural view of the cutting blade assembly 3 shown in fig. 1. Referring to fig. 1 to 6, a cup cutting apparatus 100 according to an embodiment of the present invention includes: a workbench 1 arranged on a fixed base, wherein the workbench 1 is used for placing cup molding sponge (not shown in the figure) to be cut; the pressing mechanism 2 is arranged above the workbench 1, and a pressing end of the pressing mechanism 2 can move up and down in the vertical direction under the driving of the first driving device; and the cutting knife assembly 3 can be detachably placed on the workbench 1, the cutting knife assembly 3 at least comprises an annular cutter 31, and the cutting edge of the annular cutter 31 is arranged downwards. Wherein, the annular cutter 31 can be constructed into a vertical plate annular structure, and the cutting profile surrounded by the annular cutter 31 is constructed to be the same as the cup profile to be cut.

When the cup cutting device 100 according to the embodiment of the present invention is used, the annular cutter 31 of the cutter assembly 3 is placed at a corresponding cup position on the cup-shaped sponge to be cut, the cutting edge of the annular cutter 31 contacts with the sponge, and the cutting contour surrounded by the annular cutter 31 matches with the shape of the cup. The cup molding sponge to be cut, on which the annular cutter 31 is placed, is integrally placed on the workbench 1, the first driving device is started, and the pressing end of the pressing mechanism 2 moves downwards under the driving of the first driving device until certain pressure is applied to the annular cutter 31, so that the annular cutter 31 cuts the sponge. After the cutting is completed, the first driving device drives the pressing end of the pressing mechanism 2 to move upwards, so that the pressing mechanism 2 is separated from the annular cutter 31, the cup molding sponge after the cutting is completed is taken out, the cut cup is taken out for standby, and then the annular cutter 31 is placed at the position of the next cup to be cut to enter the cutting operation of the next cup.

With the above arrangement, the cup cutting apparatus 100 of the embodiment of the present invention has the following advantages: 1) according to the cup cutting equipment 100 provided by the embodiment of the invention, before cutting, the annular cutter 31 is only required to be placed at the corresponding cup, then the whole body is placed on the workbench 1, and the driving device is started to finish the cutting of the cup, so that the cup cutting equipment 100 provided by the embodiment of the invention is convenient to use, and the cup production efficiency can be effectively improved; 2) the cup cutting equipment 100 of the embodiment of the invention can complete the whole process only by the annular cutter 31 and the pressing mechanism 2, so that the cup cutting equipment 100 has a simple structure, and the production cost of enterprises can be directly reduced for small and medium-sized enterprises, and the cup cutting equipment is suitable for popularization and use.

Preferably, as shown in fig. 6, the cutter assembly 3 may include two ring cutters 31 symmetrically disposed at left and right sides and connected to each other, and the distance between the centers of the two ring cutters 31 is set to be equal to the distance between the centers of the left and right cups on the cup-shaped sponge. With this arrangement, it is known from the common knowledge that the cups are designed to be symmetrical with respect to each other, and therefore, the cups are usually formed symmetrically with respect to each other when the cups are formed on the cup-forming sponge. In the embodiment of the present invention, the cutter assembly 3 is configured to have two annular cutters 31 arranged in bilateral symmetry, so that when in use, a set of cups in bilateral symmetry can be cut at one time. Like this, not only directly improved the efficiency of cup production, control the while and cut for a set of still more be convenient for the grouping of the cup after the cutting reserve to cup mistake scheduling problem's emergence in follow-up production process about avoiding, thereby still improved the production efficiency of underwear. Further preferably, the cutter assembly 3 may include a plurality of sets of annular cutters 31 arranged in left-right symmetry, so that the production efficiency can be further improved.

Preferably, as shown in connection with fig. 6, the vertical plate ring structure may be made of a metal material. Through this setting, annular cutter 31's simple structure, easily processing can directly reduce the manufacturing cost of cutter. Preferably, the annular cutter 31 can be made of materials with high structural strength, such as steel, so that the structural strength is ensured, the pressure resistance of the annular cutter can be improved, and the service life of the annular cutter is prolonged.

Preferably, as shown in fig. 2, the working table 1 may include a base 11 and a moving table 12 disposed on the base 11, the cup-shaped sponge to be cut is placed on the moving table 12, and the pressing mechanism 2 is fixed on the base 11 and located above the moving table 12. Wherein the moving table 12 can be configured to move horizontally between the proximal end a and the distal end B under an external force. With this arrangement, the moving table 12 is arranged to be horizontally movable between the proximal end a and the distal end B, i.e., in a direction close to the operator and between the pressing positions of the pressing mechanism 2. Like this, when operating personnel placed the cup shaping sponge that treats the cutting, can remove removal mesa 12 and place after the position that is close to operating personnel and is located the outside of applying pressure mechanism 2, place and remove the below region of portable mesa to applying pressure mechanism 2 again after accomplishing to go on the cutting operation of exerting pressure of going after, thereby can guarantee effectively and improve the security of operating personnel when changing the position of annular cutter 31.

In a preferred embodiment, the movable table 12 can be controlled electrically by a slide rail, a slide way and a driving device, or can be controlled manually by only connecting the slide rail and the slide way, and can be specifically set according to actual requirements. The preferred embodiment is exemplified in that if the movable table 12 is manually pushed and pulled by the connection of the slide rail and the slide way, a slide way (not shown) is provided on one of the bottom of the movable table 12 and the top of the base 11 along the moving direction of the movable table 12, and a slide rail (not shown) slidably engaged with the slide way is provided on the other.

Preferably, as shown in fig. 4 and 5, the pressing mechanism 2 may include a supporting frame 21 fixedly connected to the base 11 and a first telescopic mechanism 22 vertically disposed on the supporting frame 21, wherein a horizontal pressing plate 23 is fixedly connected to an end of the first telescopic mechanism 22 facing the workbench 1, and the horizontal pressing plate 23 is capable of pressing and disengaging the cutting blade assembly 3 under the driving of the first telescopic mechanism 22. Preferably, the area of the horizontal pressing plate 23 should be equal to or larger than the area of the cross section of the cutter assembly 3 to achieve more stable and good force application.

In a preferred embodiment, the horizontal pressing plate 23 may include two plate portions 231 (as shown in fig. 5) disposed symmetrically left and right and connected to each other, the pressing mechanism 2 may further include a pressing rod mechanism 24 disposed between the two plate portions 231, the pressing rod mechanism 24 may include a horizontal pressing rod 241 elastically connected to the first retracting mechanism 22 perpendicularly to the retracting direction of the first retracting mechanism 22, the length direction of the horizontal pressing rod 241 is parallel to the moving direction of the moving table 12, and the horizontal pressing rod 241 is disposed to be able to pre-press the cutting knife before the horizontal pressing plate 23 is driven by the first retracting mechanism 22. Here, the elastic connection is understood to mean that the connection to the first telescopic mechanism 22 is via a spring which can have a downward pressure in the compressed state.

With the above arrangement of the preferred embodiment, the cup cutting device 100 of the present embodiment can realize the pre-pressing of the cutting knife assembly 3 by the horizontal pressing bar 241. Specifically, cup cutting equipment 100 is when using, first telescopic machanism 22 drive level pressure plate 23 and horizontal depression bar 241 remove to cutting knife subassembly 3 simultaneously, the position through with horizontal depression bar 241 is less than horizontal pressure plate 23 setting, like this, horizontal depression bar 241 can be prior to horizontal pressure plate 23 and cutting knife subassembly 3 contact in order to carry out the pre-compaction admittedly to cutting knife subassembly 3, cutting knife subassembly 3 after the pre-compaction is fixed in corresponding position steadily, in order can guarantee the accuracy of cutting knife subassembly 3 position effectively when horizontal pressure plate 23 is exerted pressure and is cut, thereby can guarantee the cutting shape of the cup of accomplishing.

In a second preferred embodiment as shown in fig. 4 and 5, the horizontal pressing plate 23 may include two plate portions 231 which are arranged in bilateral symmetry and connected with each other, the pressing mechanism 2 may further include a pressing rod mechanism 24 arranged between the two plate portions 231, the pressing rod mechanism 24 may include a second driving device 242 arranged on the moving table top 12 and a horizontal pressing rod 241 connected with the second driving device 242 and having a length direction parallel to the moving direction of the moving table top 12, and the second driving device 242 is used for driving the horizontal pressing rod 241 to move up and down along a vertical direction to disengage and press the cutting knife assembly 3.

With the above arrangement of the preferred embodiment, the cup cutting device 100 of the present embodiment can realize the pre-pressing of the cutting knife assembly 3 by the horizontal pressing bar 241. Specifically, cup cutting equipment 100 is when using, and cutting knife subassembly 3 places back on the cup shaping sponge that waits to cut, and second drive arrangement 242 drive horizontal compression bar 241 and cutting knife subassembly 3 contact in order to carry out the prepressing with cutting knife subassembly 3 admittedly, and cutting knife subassembly 3 after the prepressing is fixed in corresponding position steadily to can guarantee the accuracy of cutting knife subassembly 3 position effectively when the cutting of exerting pressure at horizontal pressure plate 23, thereby can guarantee the cutting shape of the cup of accomplishing.

Above-mentioned two kinds of preferred embodiments all can be guaranteed operating personnel when placing cutting knife subassembly 3 and waiting the whole part on the cup shaping sponge that cuts, can realize the stability of cutting knife subassembly 3 position through pressing in advance admittedly to can avoid effectively causing the unsafe problem of cutting position to take place because of the relatively poor and cause of stability of cutting knife subassembly 3 when removing mesa 12 and remove.

In a preferred embodiment, the pressing rod mechanism 24 may further include a second telescopic mechanism (not shown) fixed on the supporting frame 21 and connected to the horizontal pressing rod 241, and the second telescopic mechanism is used for driving the horizontal pressing rod 241 to extend and retract in the horizontal direction. It can be known in connection with the above description, in order to guarantee and improve the safety of operating personnel when changing the position of annular cutter 31, generally when placing cutting knife subassembly 3 and the whole part on the cup shaping sponge that waits to cut, the removal mesa 12 moves to the outside and is close to operating personnel's position, this embodiment sets up the second telescopic machanism and can be after cutting knife subassembly 3 and the whole part that waits to cut on the cup shaping sponge are placed, before removal mesa 12 moves to the position of exerting pressure, can enough realize the pre-compaction admittedly through horizontal compression bar 241, thereby make the in-process that removes mesa 12 and remove, cutting knife subassembly 3's overall stability is better, further can avoid causing the inaccurate problem of cutting position to take place because of the relatively poor stability of cutting knife subassembly 3 when removing mesa 12 and remove, guarantee the accuracy of cutting knife subassembly 3 position.

Preferably, as shown in fig. 1 to 5, the pressing mechanism 2 further includes a prepressing mechanism 25, the prepressing mechanism 25 includes a third telescopic mechanism 251 fixed on a side wall of the supporting frame 21 and a vertical pressing rod 252 (shown in fig. 1) connected to the third telescopic mechanism 251, the vertical pressing rod 252 is located above the horizontal pressing rod 241, and the vertical pressing rod 252 can be driven by the third telescopic mechanism 251 to disengage from and press the horizontal pressing rod 241. In combination with the above, since the horizontal pressing rod 241 can extend and retract, the pressure at the end of the horizontal pressing rod 241 can be gradually reduced along with the extension and retraction length of the horizontal pressing rod 241, in this embodiment, by providing the pre-pressing mechanism 25, a certain pressure can be effectively applied to the end of the horizontal pressing rod 241, so that the pressure strength at the end of the horizontal pressing rod 241 can be ensured, and the stability of the pressure of the cutting knife assembly 3 in the moving process can be ensured.

It should be noted that the first telescoping mechanism 22, the second telescoping mechanism (not shown in the figure), and the third telescoping mechanism 251 can be implemented by means of linear transmission of an air cylinder, electric control linear transmission of a guide rail and a slide block, and the like, and it is only required that the components connected with the corresponding telescoping mechanisms can move and apply force in the vertical direction and the horizontal direction.

In the preferred embodiment shown in fig. 1, a groove 32 for accommodating the horizontal pressing rod 241 may be further formed at one end of the vertical pressing rod 252 abutting the horizontal pressing rod 241 and/or at a position where the top of the cutting knife assembly 3 abuts the horizontal pressing rod 241. As can be seen from the above description, the vertical pressing rod 252 and the horizontal pressing rod 241, and the horizontal pressing rod 241 and the cutting knife assembly 3 are slidably and firmly engaged. Like this, in this embodiment, through setting up recess 32, can be at the in-process of pressing solid through the recess 32 that forms and the cooperation of horizontal depression bar 241, spacing horizontal depression bar 241 and cutting knife subassembly 3's position effectively to can make its application of force to cutting knife subassembly 3 can not produce the skew, guarantee the stability of pressing solid. Like this, the position of spacing cutting knife subassembly 3 can guarantee effectively that the cup shaping sponge that waits to cut places the uniformity of position to can make the orderly efficient of production go on.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

Furthermore, the terms "first", "second", etc. 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. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.