CN216469093U - Packing box - Google Patents

Abstract

The utility model provides a packing box, include: an openable outer packing box; and the inner packing box is accommodated in the outer packing box, the upper edge of the inner packing box is provided with a plurality of butt joint plates which are turned outwards, and the lower parts of the butt joint plates are butted with the inner wall of the outer packing box so as to separate the inner packing box from the inner wall of the outer packing box. The utility model has the advantages that: the inner packing box and the outer packing box are relatively separated through the abutting plate, so that the packing box can be effectively prevented from being damaged or deformed due to collision or extrusion when in use, and a buffering effect can be provided for an article to be packed; the structure of the inner packing box and the outer packing box is kept compact, the packing material is saved, and the occupied space is saved.

Description

Packing box

Technical Field

The utility model relates to the field of packaging technology, especially, relate to a packing carton.

Background

Electronic product such as flush mounting plate of switch, controller, smart machine all has self independent packing carton, and the packing carton plays the function of decorating and simple protection, and for the convenience of being sold the show before by the packing article, generally with the form of packing carton design for outer packing carton and the inside inner packing carton of locating outer packing carton with inlaying. At present, the inner packing box among most packing boxs is that direct the inlaying locates in the packing carton, by the packing article holding in the inner packing box, inner packing box lateral wall and outer packing box lateral wall in close contact with, when outer packing box received the extrusion or collided, the effort can directly transmit to the inner packing box, and buffer function is poor, causes easily by the packing article damage, is difficult to satisfy the requirement of this type of packing article in transportation and storage process.

SUMMERY OF THE UTILITY MODEL

In view of this, in order to solve the inner packing box and the outer packing box in close contact with of current packing carton, lead to easily when receiving the extrusion or the collision by the problem of packing article damage, the utility model provides an embodiment provides a packing carton.

An embodiment of the utility model provides a packing carton, include:

an openable outer packing box; and the inner packing box is accommodated in the outer packing box, the upper edge of the inner packing box is provided with a plurality of butt joint plates which are turned outwards, and the lower parts of the butt joint plates are butted with the inner wall of the outer packing box so as to separate the inner packing box from the inner wall of the outer packing box.

Preferably, the abutment plate is rotatable about its upper edge with the inner pack.

Preferably, the abutting plate is formed by pressing and folding relative to the upper edge of the inner packing box, and the abutting plate rotates relative to a crease line of the abutting plate and the upper edge of the inner packing box.

Preferably, the abutting plate is obliquely arranged.

Preferably, the lower part of the abutting plate is in point contact, line contact or surface contact with the inner wall of the outer packing box.

Preferably, the shape of each of the abutting plates is the same or different.

Preferably, the abutment plate is trapezoidal in shape.

Preferably, the thickness of the inner pack is lower than the depth of the outer pack.

Preferably, the inner packing box is a box body with an opening at the upper end, and each abutting plate is arranged around the box opening of the inner packing box.

Preferably, the inner packing box is a polygonal groove body with an opening at the upper end, and each edge of the box opening of the inner packing box is provided with one abutting plate.

Preferably, the inner packing box is a rectangular box body with an opening at the upper end, and each side of the box opening of the inner packing box is provided with the abutting plate.

Preferably, the inner packing box comprises a polygonal base plate and a plurality of enclosing plates, wherein the lower edge of each enclosing plate is connected with one edge of the base plate, and the upper edge of each enclosing plate is turned outwards to form the abutting plate.

Preferably, the enclosing plate is formed by bending and extending the edge of the base plate upwards.

Preferably, the shroud is rotatable about its lower edge.

Preferably, the lower edge of each enclosing plate is coincident with one edge of the base plate.

Preferably, the side edges of two adjacent coamings are overlapped.

Preferably, the outer packing box is in a shape of a cuboid and comprises a front plate and a rear plate which are parallel, a top plate and a bottom plate which are parallel, and two side plates which are parallel, wherein the top plate and the rear plate are connected and can rotate, so that the top plate can be opened and closed.

Preferably, the upper edge of each side plate is provided with a rotatable wing plate.

Preferably, the wing plate is formed by bending and extending the edge of the side plate inwards.

Preferably, the front part of the top plate is provided with an inserting plate which is inserted into the inner side of the upper part of the front plate so as to close the outer packing box.

Preferably, the inner box is formed by folding a single paperboard.

Preferably, the outer box is formed by folding a single sheet of cardboard.

Preferably, the surface of the outer packing box is provided with label sticking marks.

Preferably, the labeling indicia is disposed on the top plate.

Preferably, the labeling marks are L-shaped, the number of the labeling marks is two, and the two labeling marks are symmetrically arranged relative to the center parting line of the top plate.

Preferably, the label is marked as an indentation or a slit.

Preferably, the sticker indicia includes a first locator and a second locator; the first positioning portion and the second positioning portion are both linear; one end of the first positioning part is vertically connected with the other end of the second positioning part; the length of the first positioning portion is different from the length of the second positioning portion.

The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the utility model discloses a packing box, make inner packing box and outer packing box relatively separate through the butt joint board, thus can prevent effectively that the packing box from suffering from the collision or extruding and damaging or warping when using, and can provide the cushioning effect for waiting to pack the article; the structure of the inner packing box and the outer packing box is kept compact, the packing material is saved, and the occupied space is saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of a package box of the present invention;

FIG. 2 is an exploded view of a package of the present invention;

FIG. 3 is a perspective view of the inner package 20 of FIG. 1;

FIG. 4 is a schematic perspective view of the inner packing box 20 in FIG. 1;

FIG. 5 is a perspective view of the inner package 20 of FIG. 1;

FIG. 6 is an expanded plan view of the inner package 20 of FIG. 1;

FIG. 7 is a schematic view of the top panel and corresponding flaps of the outer box of FIG. 1 open and the bottom panel closed;

FIG. 8 is a schematic view of the bottom panel and corresponding flaps of the outer box of FIG. 1 open and the top panel closed;

in the figure: 10-outer packing box, 101-top plate, 101 a-inserting plate, 102-bottom plate, 103-back plate, 104-front plate, 105-side plate, 105 a-wing plate, 20-inner packing box, 201-base plate, 202-surrounding plate and 203-abutting plate.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described below with reference to the accompanying drawings. The following description is of the preferred embodiment of the present invention and is provided to enable a person of ordinary skill in the art to make and use the invention and is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It should be understood that they are relative concepts that may be varied in a number of ways depending on the use and placement of the package and that the use of directional terms should not be taken to limit the scope of the claims.

In the description of the present invention, it should be understood that the terms "upper portion", "lower portion", "upper end", "lower surface", "upper surface", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only 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 and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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, "plurality" means a plurality, such as two, three, four, etc., unless specifically limited otherwise.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and the like are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Referring to fig. 1-6, the structure of a packing box provided by the present application is specifically illustrated based on fig. 1-6; specifically, referring to fig. 1 and 2, an embodiment of the present invention provides a packing box, which includes an openable outer packing box 10 and an inner packing box 20 accommodated in the outer packing box 10.

As shown in fig. 2, the external packing box 10 includes a top plate 101, a bottom plate 102, a rear plate 103, a front plate 104 and two side plates 105. Wherein the bottom plate 102 is located at the bottom of the outer box 10, and the top plate 101 is disposed opposite to the bottom plate 102. The front plate 104 and the rear plate 103 are arranged in a front-back opposite manner, the bottoms of the front plate 104 and the rear plate 103 are both connected with the bottom plate 102, the two side plates 105 are positioned between the front plate 104 and the rear plate 103, the bottoms of the side plates 105 are connected with the bottom plate 102, and the front plate 104 and the rear plate 103 are respectively connected on the front side and the rear side.

As further shown in fig. 3 and 4, the bottom panel 102, the front panel 104, the rear panel 103 and the two side panels 105 define a slot with an upward facing notch, the rear edge of the top panel 101 is connected to the upper edge of the rear panel 103, and the top panel 101 is openable to insert or remove the inner pack 20 and the packaged articles. Specifically, the rear edge of the top plate 101 coincides with the upper edge of the rear plate 103 and is a crease line around which the top plate 101 can rotate. The front part of the top plate 101 is provided with a bent insertion plate 101a, the insertion plate 101a and the front edge of the top plate 101 form another crease line, the insertion plate can rotate around the crease line, and the insertion plate 101a is inserted into the front side of the slot body when the top plate 101 rotates to be closed with the slot body, so that the outer packing box 10 is stably closed.

As shown in fig. 1 and 2, in the present embodiment, the packing box is used for packing a cuboid-shaped switch panel or doorbell product, so that the outer packing box 10 is designed to be cuboid, the front panel 104 is parallel to the rear panel 103, the top panel 101 is parallel to the bottom panel 102, and the two side panels 105 are parallel. It will be understood by those skilled in the art that the shape and size of the outer box 10 when packaged is not limited to the specific embodiment of the present invention, and can be adjusted according to the shape and size of the packaged object contained therein.

As shown in fig. 2, each of the side plates 105 is provided at an upper edge thereof with a rotatable wing plate 105 a. The wing plate 105a is formed by bending and extending the edge of the side plate 105 inwards. The two wings 105a are folded inward toward the outer pack 10 to close the inner pack 20.

As shown in fig. 7 and 8, fig. 7 is a schematic view of the outer box 10 with the top plate 101 and the corresponding wing 105a open and the bottom plate 102 closed; fig. 8 is a schematic view of the outer box 10 with the bottom panel 102 and the corresponding flaps 105a open and the top panel 101 closed; as can be seen, the top end structure and the bottom end structure of the outer box 10 are symmetrical up and down, or the same; the upper side refers to a side corresponding to the top plate 101, and the lower side refers to a side corresponding to the bottom plate 102; thus, the manufacturing and folding processes of the outer packing box 10 are easier.

As shown in fig. 3, the shape of the inner pack 20 is approximately the same as or matched with the shape of the mouth of the outer pack 10 to fit the outer pack 10. Since the package box of the present embodiment is used for packing a rectangular switch panel, the inner package box 20 is a rectangular box body, and can be put into the outer package box 10 through the box opening of the outer package box 10 and taken out through the box opening of the outer package box 10. Preferably, the thickness of the inner pack 20 is lower than the depth of the outer pack 10, so that the packaged goods can protrude from the inner pack 20, and the packaged goods can be conveniently taken out from the inner pack 20. It will be appreciated that in other embodiments, when the package is used to package other articles, the shape of the inner package 20 can be flexibly adjusted according to the shape of the packaged article.

The upper edge of the inner packing box 20 is provided with a plurality of abutting plates 203 which are turned outwards, and the lower parts of the abutting plates 203 are directly or indirectly abutted against the inner wall of the outer packing box 10, so that the inner packing box 20 is separated from the inner wall of the outer packing box 10. The inner packing box 20 is designed as a box body with an open upper end, and each abutting plate 203 is arranged around the box opening of the inner packing box 20 so as to facilitate the access of the packed articles. Generally, the inner packing box 20 is a polygonal slot with an open upper end, and the abutting plate 203 is disposed on each side of the edge of the opening of the inner packing box 20. Preferably, the inner packing box 20 is a rectangular box with an open upper end, and each side of the box opening is provided with one abutting plate 203.

It should be noted that, as shown in fig. 4 and 5, the abutting plate 203 can rotate around the upper edge thereof and the inner pack 20, so as to facilitate the loading of the inner pack 20 into the outer pack 10. The abutting plate 203 may be formed by extending the upper edge of the inner pack 20 directly. If the abutting plate 203 is formed by folding and pressing the upper edge of the inner pack 20, the abutting plate 203 rotates relative to the folding line with the upper edge of the inner pack 20.

The number and shape of the abutting plates 203 may not be limited. The number of the abutting plates 203 is only required to be one for each surface of the inner wall of the outer packing box 10. The shapes of the abutting plates 203 may be the same or different from each other, and the inner pack 20 and the outer pack 10 may be separated from each other. The abutting plate 203 is disposed obliquely, and has an upper portion integrally connected to the inner pack 20 and a lower portion abutting against the inner wall of the outer pack 10. Since the shape of the lower portion of the abutting plate 203 can be set in various ways, the lower portion of the abutting plate 203 can contact with the inner wall of the outer packing box 10 in various ways, such as point contact, line contact or surface contact, as long as the contact and abutting effect can be achieved.

More specifically, as shown in fig. 3, 4 and 5, the inner box 20 of the present embodiment includes a polygonal base plate 201 and a plurality of side plates 202, wherein the lower side of each side plate 202 is connected to one side of the base plate 201, and the upper side of each side plate is folded outwards to form the abutting plate 203.

The lower end of the abutting plate 203 abuts against the bottom plate 102 of the outer packing box 10 directly or indirectly, and the width B of the abutting plate 203 is greater than the thickness a of the inner packing box 20, so as to form a hidden accommodating space between the bottom plate 102 of the outer packing box 10 and the base plate 201 of the inner packing box 20, and form an open accommodating space between the base plate 201 of the inner packing box 20 and the box opening of the outer packing box. The hidden accommodating space is used for packaging spare and accessory parts, such as screws, double-sided adhesive, data lines, signal lines and other spare and accessory parts; the open accommodating space is used for packaging a main body part (such as a switch) of a packaged article; therefore, when the top plate 101 is opened, the user only sees the packaged objects contained between the box openings of the inner packing box 20 and the outer packing box 10, and does not see the parts hidden in the hidden containing space hidden below, so that the overall appearance is more concise, and the user experience is improved. Meanwhile, because the hidden accommodating space below the inner packing box 20 exists, when the packing box falls, if the bottom of the outer packing box 10 is pressed by the contact with the ground, the hidden accommodating space can play a good buffering role so as to prevent the packed articles from being pressed and reduce the damage to the packed articles caused by the pressing.

Further, in order to prevent the user from neglecting the packaged articles in the hidden accommodating space without knowing the internal structure of the package box, the base plate 201 of the inner package box 20 may further be provided with at least one observation hole (not shown) penetrating through the base plate 201 of the inner package box 20, so that the open accommodating space is communicated with the hidden accommodating space, and further, after the user takes out the packaged articles in the open accommodating space, the user can find the spare parts in the hidden accommodating space through the observation hole, so as to prevent the articles from being lost and leaked.

The enclosing plates 202 are formed by bending and extending the edges of the substrate 201 upward, and the lower edge of each enclosing plate 202 coincides with one edge of the substrate 201. The lower edge of the coaming 202 is a crease line with the base plate 201, and the coaming 202 can rotate around the crease line. The side edges of two adjacent enclosing plates 202 are overlapped but not connected, so that the enclosing plates 202 are in a flexible rotating state, and packaged articles can be conveniently placed in the inner packing box 20.

Similarly, in this embodiment, the abutting plate 203 is also formed by folding, specifically, the upper edge of each of the surrounding plates 202 is folded outwards to form the abutting plate 203, so that the abutting plate 203 can rotate around the folding line of the surrounding plate 202. In order to ensure that each side surface of the inner packing box 20 is separated from the inner wall of the outer packing box 10, the abutting plates 203 are arranged on four side surfaces of the inner packing box 20, and each abutting plate 203 is arranged in pairs in an opposite manner, so that the two opposite side surfaces of the inner packing box 20 are better separated from the inner wall of the outer packing box 10. Preferably, the abutting plates 203 are shaped like an isosceles trapezoid, so that two adjacent abutting plates 203 are prevented from interfering with each other.

As shown in fig. 2, in order to solve the labeling problem of the external packing box 10, a labeling mark 1011 is provided on a surface of the external packing box 10, and the labeling mark 1011 may be provided on any surface of the external packing box 10. The labeling mark 1011 in this embodiment is disposed on the top plate 101, and the labeling mark 1011 in this embodiment is configured to be L-shaped; note that, the fact that the labeling mark 1011 is L-shaped means that: the shape of the label tag 1011 is similar to the shape of a capital letter L, and in a specific embodiment, the label tag 1011 includes a first positioning portion 10111 and a second positioning portion 10112; wherein the first positioning portion 10111 and the second positioning portion 10112 are provided as linear indentations or cutting lines, and one end of the first positioning portion 10111 is connected to one end of the second positioning portion 10112 and is vertically disposed, in addition, the lengths of the first positioning portion 10111 and the second positioning portion 10112 are different, as in the illustrated example of the present embodiment, the length of the first positioning portion 10111 is longer than the length of the second positioning portion 10112, so that the labeling mark 1011 as a whole travels in a shape similar to "L", in the process of labeling, the characteristics can be utilized to prevent the fool so as to prevent the labels from being reversely labeled, furthermore, the labeling mark 1011 can be positioned by using the right-angled features similar to the "L" shape formed by the first positioning portion 10111 and the second positioning portion 10112, and fool-proofing is achieved by using the features of the L shape with two sides of different lengths; in this embodiment, the number of the labeling marks 1011 is two, and the two labeling marks 1011 are symmetrically arranged relative to the midline of the top plate 101. After the packaged article is accommodated in the external packing box 10, the labeling machine is used for positioning and labeling through the two labeling marks 1011, so that information contents such as characters and patterns related to the packaged product are directly and intuitively displayed in front of consumers. Typically, the labeling indicia 1011 are indentations or slits. Among the above technical scheme, through the setting of labeling mark 1011 for the packing carton is fixing a position the calibration to the label more easily at the in-process of labelling, prevents that the label from pasting askewly. Of course, in other embodiments, the shape, number and arrangement position of the labeling markers 1011 may be adjusted as needed. For the shape of the label tag 1011, in other embodiments, other shapes with positioning effect may be set; for the number and the arrangement positions of the labeling marks 1011, for example, in another embodiment: only one label sticking mark is arranged, and the label sticking mark is used as a central point for positioning during label sticking; or in another embodiment: be provided with 3 labeling marks, one of them labeling mark sets up the central point at roof 101 and puts, and two other labeling marks are relative roof 101 divide the line symmetry to set up, and three labeling mark sets up on same straight line, when labeling, mainly fixes a position with the labeling mark of centre as the central point, with the labeling mark on both sides as the assistance-localization real-time for the location is more accurate. Of course, the above embodiments of the shape, number and arrangement position of the three labeling marks are only examples and are not intended to limit the present invention.

In addition, in the present embodiment, the outer packing box 10 may be formed by folding, adhering, splicing, etc. a single paperboard or multiple paperboards, and the inner packing box 20 may be integrally formed by folding a single paperboard as shown in fig. 6, so as to reduce the production process and save the manufacturing cost.

It should be noted that the packaging box provided by the present invention can be used for packaging various products, and is not limited to the switch panel and the doorbell product listed in this embodiment, and the products that can be packaged include but are not limited to electronic digital products, plastics, ceramics, biochemical products, food and medicine, etc.

In the description herein, references to the terms "an embodiment," "an example," "a specific implementation," "an example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the example 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 do not necessarily 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.

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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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.

Claims (22)

1. A package, comprising:

an openable outer packing box;

and the inner packing box is accommodated in the outer packing box, the upper edge of the inner packing box is provided with a plurality of butt joint plates which are turned outwards, and the lower parts of the butt joint plates are butted with the inner wall of the outer packing box so as to separate the inner packing box from the inner wall of the outer packing box.

2. A package according to claim 1, wherein: the abutting plate can rotate around the abutting plate and the upper edge of the inner packing box.

3. A package according to claim 2, wherein: the abutting plate is formed by pressing and folding relative to the upper edge of the inner packing box, and the abutting plate rotates relative to the folding line of the abutting plate and the upper edge of the inner packing box.

4. A package according to claim 1, wherein: the abutting plate is obliquely arranged.

5. A package according to claim 1, wherein: the lower part of the abutting plate is in point contact, line contact or surface contact with the inner wall of the outer packing box.

6. A package according to claim 1, wherein: the shape of the abutting plates is trapezoidal, and the shapes of the abutting plates are the same or different.

7. A package according to claim 1, wherein: the thickness of the inner packing box is lower than the depth of the outer packing box.

8. A package according to claim 1, wherein: the inner packing box is upper end open-ended box body, each the butt joint board encircles the box opening setting of inner packing box.

9. A package according to claim 8, wherein: the inner packing box is a polygonal groove body with an opening at the upper end, and each edge of the box opening edge of the inner packing box is provided with the abutting plate.

10. A package according to claim 8, wherein: the inner packing box comprises a polygonal base plate and a plurality of enclosing plates, wherein the lower edge of each enclosing plate is connected with one edge of the base plate, and the upper edge of each enclosing plate is turned outwards to form the abutting plate.

11. A package according to claim 10, wherein: the lower end of the abutting plate is abutted against the bottom plate of the outer packing box so as to separate the base plate of the inner packing box from the bottom plate of the outer packing box, and then at least one hidden accommodating space is formed between the bottom plate of the outer packing box and the base plate of the inner packing box, and an open accommodating space is formed between the base plate of the inner packing box and the box opening of the outer packing box.

12. A package according to claim 11, wherein: the base plate of the inner packing box is provided with at least one observation hole, and the observation hole penetrates through the base plate of the inner packing box, so that the open accommodating space is communicated with the hidden accommodating space.

13. A package according to claim 10, wherein: the coaming is formed by bending and extending the edge of the substrate upwards; the coaming can rotate around the lower edge of the coaming; the lower edge of each coaming is superposed with one edge of the substrate; and the side edges of two adjacent coamings are overlapped.

14. A package according to claim 1, wherein: the outer packing box is in a cuboid shape and comprises a front plate, a rear plate, a top plate, a bottom plate and two parallel side plates, wherein the front plate and the rear plate are parallel, the top plate and the bottom plate are parallel, and the top plate is connected with the rear plate and can rotate so as to be opened and closed.

15. A package according to claim 14, wherein: the upper edge of each side plate is provided with a rotatable wing plate; the wing plates are formed by bending and extending the edges of the side plates inwards; the front part of the top plate is provided with an inserting plate, and the inserting plate is inserted into the inner side of the upper part of the front plate so as to close the outer packing box.

16. A package according to claim 15, wherein: the top end structure and the bottom end structure of the outer packing box are mutually symmetrical.

17. A package according to claim 1, wherein: the inner packing box and the outer packing box are formed by folding a single paperboard.

18. A package according to claim 14, wherein: and label sticking marks are arranged on the surface of the outer packaging box.

19. A package according to claim 18, wherein: the label sticking mark is arranged on the top plate.

20. A package according to claim 18, wherein: the labeling marks are L-shaped, the number of the labeling marks is two, and the two labeling marks are symmetrically arranged relative to the middle parting line of the top plate.

21. A pack according to any one of claims 18 to 20, wherein: the label is marked as an indentation or a slit.

22. A pack according to any one of claims 18 to 20, wherein: the label sticking mark comprises a first positioning part and a second positioning part; the first positioning portion and the second positioning portion are both linear; one end of the first positioning part is vertically connected with the other end of the second positioning part; the length of the first positioning portion is different from the length of the second positioning portion.

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