A rotating packaging box

Abstract

The present application relates to a rotating packaging box, comprising a box body, a box holder for placing cosmetics, a cover plate, and a rotating mechanism for driving the box holder to rotate relative to the box body and the cover plate; the box holder is installed in the box body, the cover plate is used to cover the box body, a side of the box holder close to the cover plate is provided with a plurality of placement cavities for placing cosmetics, and the cover plate is provided with a plurality of access openings for facing and communicating with the placement cavities. The present application has the effect of improving the problem that the packaging box needs to be flipped for taking and placing, and the cosmetics are mixed crosswise.

Description

Technical Field

[0001] The present application relates to the technical field of cosmetic packaging boxes, and in particular to a rotating packaging box. Background Art

[0002] Cosmetics are indispensable for people in modern life, especially for ladies. Cosmetics usually need to be packaged in boxes before entering the market. The packaging box can not only protect the products inside, but also beautify the external image of the cosmetics, thus promoting the circulation of cosmetics. The quality of packaging directly affects the sales of cosmetics, as well as the audience's judgment on the quality and grade of cosmetics.

[0003] At present, there are many types of packaging boxes for storing cosmetics, most of which are flip-top structures, that is, the box consists of a box cover and a box body, the box body is provided with a plurality of cavities or grooves for storing cosmetics, and the edge of the box cover is usually connected to the edge of the box body by a hinge.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: when using such a box, the box cover needs to be opened to take out the cosmetics stored in the box, and the various cosmetics in the box are easily cross-mixed, which affects the use effect. Summary of the invention

[0005] In order to improve the problem that the packaging box needs to be flipped to take and put, and the cosmetics are cross-mixed, the present application provides a rotating packaging box.

[0006] The present application provides a rotating packaging box adopting the following technical solution:

[0007] A rotating packaging box comprises a box body, a box holder for placing cosmetics, a surface cover, and a rotating mechanism for driving the box holder to rotate relative to the box body and the surface cover; the box holder is installed in the box body, the surface cover is used to cover the box body, a side of the box holder close to the surface cover is provided with a plurality of placement cavities for placing cosmetics, and the surface cover is provided with a plurality of taking and placing openings facing the placement cavities and communicating with the placement cavities.

[0008] By adopting the above technical solution, when it is necessary to take or place cosmetics, the rotating mechanism is rotated until the placement cavity is located below the placement opening, so that the placement cavity is exposed to the air, so that different cosmetics can be taken or placed. The structure is compact and easy to use, and the problem of the packaging box needing to flip the lid for taking or placing and the cross-mixing of cosmetics is improved.

[0009] The present application is further configured as follows: the rotating mechanism includes a plane bearing and a driving portion for driving the plane bearing to rotate, the plane bearing is located below the box holder, the center axis of the plane bearing is parallel to the center axis of the box body, and the two ends of the plane bearing along its own center axis are respectively fixedly connected to the box body and the box holder.

[0010] By adopting the above technical solution, the driving part is started, the driving part drives the plane bearing to rotate, and the plane bearing drives the box holder to rotate. By starting the driving part, the placement cavity and the access port can be controlled to be relative or closed, which is convenient for taking and placing the required cosmetics.

[0011] The present application is further configured as follows: the driving part includes a rotating shaft and a 3D rubber part, the 3D rubber part is fixedly connected to one end of the rotating shaft in the length direction, the end of the rotating shaft away from the 3D rubber part is penetrated by a surface cover plate and fixedly connected to a plane bearing or a box holder, and the central axis of the rotating shaft is parallel to the central axis of the box holder.

[0012] By adopting the above technical solution, it is convenient for the user to grasp the 3D plastic part and rotate the shaft, thereby driving the box holder to rotate inside the box body, which is convenient and quick.

[0013] The present application is further configured as follows: the placement cavity includes a placement portion for placing cosmetics, and a pick-and-place portion for taking and placing cosmetics, a connecting port is opened at one end of the pick-and-place portion in the length direction, and the pick-and-place portion is connected to the placement portion through the connecting port; the width of the pick-and-place portion is smaller than the width of the pick-and-place portion, so that limiting portions are formed on both sides of the connecting port along the length direction of the pick-and-place portion, and the limiting portions are used to prevent cosmetics from sliding from the placement cavity into the pick-and-place portion.

[0014] By adopting the above technical solution, the taking and placing part is convenient for taking out the cosmetics placed in the placement cavity, and the limiting part prevents the cosmetics from sliding from the placement cavity into the taking and placing part and causing impact to the cosmetics.

[0015] The present application is further configured as follows: the taking and placing opening is larger than the placing cavity.

[0016] By adopting the above technical solution, when rotating the rotating mechanism, it is not necessary to fully turn the access opening to be located directly above the placement cavity in order to take out and put the lipstick, thereby reducing the problem of fine-tuning the position of the access opening when rotating the rotating mechanism.

[0017] The present application is further configured as follows: a plurality of cosmetic models are marked on one side of the box holder close to the surface cover, the cosmetic models are located on one side of the length direction of the placement cavity, each of the placement cavity corresponds to a cosmetic model, and a display port for displaying the cosmetic model is provided on one side of the length direction of the taking and placing port, and the display port and the taking and placing port are connected.

[0018] By adopting the above technical solution, when the cosmetics placed in several placement cavities are similar in appearance and difficult to distinguish, the display opening can serve as an indicator, making it easier for users to determine the desired cosmetics.

[0019] The present application is further configured as follows: an elastic layer is coated inside the placement cavity.

[0020] By adopting the above technical solution, the material of the elastic layer is described by taking EVA pearl cotton as an example, so that after the cosmetics are placed in the placement cavity, the elastic layer has a locking effect on the cosmetics, making it difficult for the cosmetics to slip out of the placement cavity.

[0021] The present application is further configured as follows: the rotating mechanism includes a rotating part and a driving part for driving the rotating part to rotate, the rotating part is located below the box holder, the rotating part includes a radial bearing, the central axis of the radial bearing is parallel to the central axis of the box body, and the two ends of the radial bearing along the direction of its own central axis are respectively installed on the box body and the box holder.

[0022] By adopting the above technical solution, the driving part is rotated, and the driving part drives the radial bearing to rotate, thereby driving the box holder to rotate. By rotating the driving part, the placement cavity and the access opening can be controlled to be relative or closed, which is convenient for taking and placing the required cosmetics.

[0023] The present application is further configured as follows: the rotating part also includes a positioning sleeve, the positioning sleeve is sleeved outside the radial bearing, the central axis of the positioning sleeve coincides with the central axis of the radial bearing, one end of the positioning sleeve along the direction of its own central axis is fixedly connected to the box body, and the inner ring of the radial bearing is fixedly connected to a padding plate for being fixedly connected to the box holder on the side close to the box holder; a plurality of one-way grooves matching the number of placement cavities are provided on the side close to the box holder, the one-way grooves are respectively arranged one by one opposite to the placement cavities, and a plurality of positioning blocks for being embedded in the one-way grooves are fixedly connected on the side close to the one-way grooves; the one-way groove and the box holder The side of the rotation direction is the same as that of the one-way groove is set as an inclined slope, and the inclination direction of the slope is inclined from the center of the one-way groove to the direction away from the center of the one-way groove, and the positioning block is a wedge-shaped block, and the inclined surface of the positioning block is used to slide with the slope.

[0024] By adopting the above technical solution, every time the user rotates the box tray unidirectionally, the positioning block moves from one unidirectional groove to another unidirectional groove, so that the placement cavity can be accurately opposite to the corresponding pick-up and release port. By respectively embedding the positioning blocks into different unidirectional grooves, the pick-up and release ports are opposite to different placement cavities, eliminating the problem of needing to accurately rotate the rotating shaft to make the placement cavity and the corresponding pick-up and release port opposite.

[0025] The present application is further configured as follows: the number of the positioning blocks is less than the number of the placement cavities, and the number of the positioning blocks is at least two.

[0026] By adopting the above technical solution, the provision of at least two positioning blocks can not only ensure the stability of the box holder during rotation, but also improve the accuracy of the interlocking fit between the positioning block and the one-way groove. The provision of too many positioning blocks will increase the error of the present application and reduce the accuracy of the interlocking fit between the positioning block and the one-way groove. If there is only one positioning block, it is easy to cause the side of the box holder away from the positioning block to collapse, affecting the rotation of the box holder.

[0027] The present application is further configured as follows: the driving part includes a rotating shaft and a 3D plastic part, the 3D plastic part is fixedly connected to one end of the rotating shaft in the length direction, the end of the rotating shaft away from the 3D plastic part is penetrated by a surface cover plate to be fixedly connected to the box holder, or the end of the rotating shaft away from the 3D plastic part is penetrated by a surface cover plate and a box holder in sequence to be fixedly connected to a padding plate, or the end of the rotating shaft away from the 3D plastic part is penetrated by a surface cover plate, a box holder and a padding plate in sequence to be fixedly connected to the inner ring of the radial bearing.

[0028] By adopting the above technical solution, it is convenient for the user to grasp the 3D plastic part and rotate the shaft, thereby driving the box holder to rotate inside the box body.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. By setting a plane bearing as a part of the rotating mechanism, and by setting an independent placement cavity and a corresponding placement port connected to the placement cavity, the problem of the packaging box needing to be flipped for placement and the cross-mixing of cosmetics is improved, and the structure is compact and easy to use.

[0031] 2. By setting the positioning sleeve, one-way groove and positioning block, the placement cavity can be accurately aligned with the corresponding pick-up and release port. By respectively embedding the positioning blocks into different one-way grooves, the pick-up and release ports are aligned with different placement cavities, eliminating the need to accurately rotate the rotating shaft to make the placement cavity and the corresponding pick-up and release port aligned. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of embodiment 1 of the present application.

[0033] Figure 2 It is a schematic diagram of the positional relationship structure of various components of Example 1 of the present application.

[0034] Figure 3 It is a schematic diagram of the box holder structure of Example 1 of the present application.

[0035] Figure 4 It is a schematic diagram of the positional relationship of the various components of the second embodiment of the present application.

[0036] Figure 5 It is a schematic diagram of the positional relationship between the rotating part and the box holder of the second embodiment of the present application.

[0037] Figure 6 It is a schematic diagram of the structure of the rotating part of the second embodiment of the present application.

[0038] Explanation of the reference numerals: 1. box body; 101. bottom cover; 102. cylinder; 2. box holder; 3. surface cover; 301. take-in and put-out port; 302. display port; 4. plane bearing; 5. rotating shaft; 6. 3D rubber part; 7. placement cavity; 71. placement part; 72. take-in and put-out part; 8. limiting part; 9. radial bearing; 10. positioning sleeve; 11. raising plate; 12. one-way groove; 13. positioning block; 14. slope. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-6 This application is described in further detail.

[0040] The embodiment of the present application discloses a rotating packaging box.

[0041] Embodiment 1

[0042] Reference Figure 1 and Figure 2 The rotating packaging box includes a box body 1, a box holder 2 for placing cosmetics, a surface cover 3, and a rotating mechanism for driving the box holder 2 to rotate relative to the box body 1 and the surface cover 3; the box holder 2 is installed in the box body 1, and the surface cover 3 is used to cover the box body 1. The box body 1, the box holder 2, and the surface cover 3 are all circular in shape, and the diameter of the box holder 2 is smaller than the diameter of the box body 1, so that the rotating mechanism can drive the box holder 2 to rotate in the box body 1. The box body 1 includes a bottom cover 101 and a cylinder 102. The cylinder 102 is fixedly connected to the side of the bottom cover 101 close to the box holder 2, and the side of the cylinder 102 away from the bottom cover 101 contacts the surface cover 3.

[0043] The rotating mechanism includes a plane bearing 4 and a driving part for driving the box tray 2 to rotate, the plane bearing 4 is located below the box tray 2, the plane bearing 4 is located in the middle of the bottom cover 101, the plane bearing 4 is fixedly connected to the bottom cover 101, and the central axis of the plane bearing 4 coincides with the central axis of the bottom cover 101. The side of the plane bearing 4 away from the bottom cover 101 is fixedly connected to the box tray 2.

[0044] The driving part includes a rotating shaft 5 and a 3D rubber part 6. The 3D rubber part 6 is fixedly connected to one end of the rotating shaft 5 in the length direction, so that the user can grasp the 3D rubber part 6 to rotate the rotating shaft 5, thereby driving the box holder 2 to rotate in the box body 1; the end of the rotating shaft 5 away from the 3D rubber part 6 is penetrated by a surface cover plate 3 and is fixedly connected to the plane bearing 4 or the box holder 2. In this embodiment, the example of the rotating shaft 5 away from the 3D rubber part 6 is taken as an example to illustrate that the central axis of the rotating shaft 5 coincides with the central axis of the box holder 2.

[0045] A plurality of placement cavities 7 for placing cosmetics are provided on one side of the box holder 2 away from the flat gasket. In this embodiment, twelve placement cavities 7 are used as an example for illustration, and the number of placement cavities 7 is not limited; in this embodiment, the placement cavities 7 are used for placing lipsticks as an example for illustration. A plurality of placement cavities 7 are arranged in a circular array along the central axis of the box holder 2, and two adjacent placement cavities 7 are spaced apart from each other. An elastic layer (not shown in the figure) is coated in the placement cavity 7, and the material of the elastic layer is described by taking EVA pearl cotton as an example, so that after the lipstick is placed in the placement cavity 7, the elastic layer has a locking effect on the lipstick, so that the lipstick is not easy to slip out of the placement cavity 7.

[0046] Reference Figure 2 and Figure 3 The placement cavity 7 includes a placement portion 71 for placing cosmetics and a pick-and-place portion 72 for taking and placing cosmetics. A connecting port is provided at one end of the pick-and-place portion 72 in the length direction. The pick-and-place portion 72 is connected to the placement portion 71 through the connecting port. The width of the placement portion 71 is smaller than the width of the pick-and-place portion 72, so that a limiting portion 8 is formed on both sides of the connecting port along the length direction of the pick-and-place portion 72. The limiting portion 8 is used to prevent the lipstick from sliding from the placement cavity 7 to the pick-and-place portion 72 and causing impact on the lipstick. The placement cavity 7 is provided on the side of the box holder 2 away from the plane bearing 4. The material of the box holder 2 is EVA resin, and the material of the box holder 2 is not limited.

[0047] The cover plate 3 is provided with a plurality of access openings 301 for facing and communicating with the placement cavity 7, and the plurality of access openings 301 are arranged in a circumferential array along the central axis of the cover plate 3. The rotating shaft 5 is rotated so that the access openings 301 are located directly above the placement cavity 7, so that the lipstick in the placement cavity 7 can be taken out and placed.

[0048] The access opening 301 is larger than the placement cavity 7, so that when the 3D plastic part 6 is rotated, it is not necessary to completely turn the access opening 301 to be located directly above the placement cavity 7 in order to access the lipstick in the box holder 2, thereby reducing the need to fine-tune the position of the access opening 301 when rotating the rotating shaft 5.

[0049] A side of the box tray 2 away from the bottom plate is marked with several lipstick color numbers (not shown in the figure), and the lipstick color numbers are located on one side of the length direction of the placement cavity 7. Each placement cavity 7 corresponds to a lipstick color number, and the lipstick color numbers are arranged in a circular array along the central axis direction of the box tray 2; a display port 302 for displaying the red number of the port 302 is opened on one side of the length direction of the taking and placing port 301, and the display port 302 and the taking and placing port 301 are connected.

[0050] Embodiment 2

[0051] Reference Figure 4 and Figure 5, the difference between the first embodiment and the second embodiment is that the structure of the rotating mechanism is different; the rotating mechanism includes a rotating part and a driving part for driving the rotating part to rotate, the rotating part includes a radial bearing 9 and a positioning sleeve 10, the radial bearing 9 and the positioning sleeve 10 are both fixedly connected to the side of the bottom cover plate 101 close to the box tray 2; the positioning sleeve 10 is sleeved outside the radial bearing 9, the central axis of the radial bearing 9 coincides with the central axis of the positioning sleeve 10, and the central axis of the positioning sleeve 10 coincides with the central axis of the bottom cover plate 101. The inner ring of the radial bearing 9 is fixedly connected to the side close to the box tray 2 with a pad plate 11, and the radial bearing 9 is fixedly connected to the side of the box tray 2 close to the bottom cover plate 101 through the pad plate 11, so that when the driving part drives the box tray 2 to rotate, the box tray 2 is prevented from contacting the outer ring of the radial bearing 9, thereby increasing the resistance of the box tray 2 during rotation.

[0052] The driving part includes a rotating shaft 5 and a 3D rubber part 6. The 3D rubber part 6 is fixedly connected to one end of the rotating shaft 5 in the length direction, so that the user can grasp the 3D rubber part 6 to rotate the rotating shaft 5, thereby driving the box holder 2 to rotate in the box body 1; the end of the rotating shaft 5 away from the 3D rubber part 6 is penetrated by a surface cover plate 3 to be fixedly connected to the box holder 2, or the end of the rotating shaft 5 away from the 3D rubber part 6 is penetrated by the surface cover plate 3 and the box holder 2 in sequence to be fixedly connected to the padding plate 11, or the end of the rotating shaft 5 away from the 3D rubber part 6 is penetrated by the surface cover plate 3, the box holder 2, and the padding plate 11 in sequence to be fixedly connected to the inner ring of the radial bearing 9; in this embodiment, the example of the end of the rotating shaft 5 away from the 3D rubber part 6 being penetrated by the surface cover plate 3, the box holder 2, and the padding plate 11 in sequence to be fixedly connected to the inner ring of the radial bearing 9 is used for explanation.

[0053] Reference Figure 5 and Figure 6 , the side of the positioning sleeve 10 close to the box tray 2 is provided with a plurality of one-way grooves 12 matching the number of the placement cavities 7, and the one-way grooves 12 are respectively arranged opposite to the placement cavities 7. The side of the box tray 2 close to the one-way grooves 12 is fixedly connected with a plurality of positioning blocks 13 for being embedded in the one-way grooves 12, the number of the positioning blocks 13 is less than the number of the placement cavities 7, and the number of the positioning blocks 13 is at least two. In this embodiment, the number of the positioning blocks 13 is three as an example for explanation, and the three positioning blocks 13 are arranged in a circumferential array along the central axis direction of the box tray 2. The arrangement of the three positioning blocks 13 can not only ensure the stability of the box tray 2 during rotation, but also improve the accuracy of the positioning blocks 13 and the one-way grooves 12 in the embedding fit. The arrangement of too many positioning blocks 13 will increase the error of the present application and reduce the accuracy of the positioning blocks 13 and the one-way grooves 12 in the embedding fit.

[0054] When the driving part is rotated, the three positioning blocks 13 can be sequentially inserted into the corresponding one-way grooves 12, and the positioning blocks 13 are respectively inserted into different one-way grooves 12, so that the access opening 301 is opposite to different placement cavities 7. A space is provided between the side of the box holder 2 away from the positioning sleeve 10 and the cover plate 3 for the positioning blocks 13 to be inserted into the one-way groove 12 or to be removed from the one-way groove 12, so as to facilitate the rotation of the box holder 2.

[0055] The side of the one-way groove 12 that rotates in the same direction as the box tray 2 is provided with an inclined slope 14, and the inclination direction of the slope 14 is inclined from the center of the one-way groove 12 to the direction away from the center of the one-way groove 12, so that the positioning block 13 inserted into the one-way groove 12 can be rotated out of the one-way groove 12 as the box tray 2 rotates. Accordingly, the positioning block 13 is a wedge-shaped block, and the inclined surface of the positioning block 13 is used to slide with the slope 14. Each time the user rotates the box tray 2 in one direction, the positioning block 13 moves from one one-way groove 12 to another one-way groove 12, so that the placement cavity 7 can be accurately opposite to the corresponding access opening 301, eliminating the need to accurately rotate the shaft 5 to make the placement cavity 7 and the corresponding access opening 301 opposite.

[0056] The implementation principle of the rotating packaging box in the above embodiment of the present application is: when it is necessary to take or place cosmetics, grasp the 3D plastic part 6 and rotate the rotating shaft 5 until a certain placement cavity 7 is located below a certain placement port 301, so that the cosmetics in the placement cavity 7 are exposed to the air, and the cosmetics in the placement cavity 7 can be taken or placed, and the rotating shaft 5 is rotated again so that the placement cavity 7 is hidden under the surface cover 3, so that the cosmetics that are not used temporarily can be hidden.

[0057] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rotating packaging box, characterized in that: The box comprises a box body (1), a box holder (2) for placing cosmetics, a cover plate (3), and a rotating mechanism for driving the box holder (2) to rotate relative to the box body (1) and the cover plate (3); the box holder (2) is installed in the box body (1); the cover plate (3) is used to cover the box body (1); a plurality of placement cavities (7) for placing cosmetics are provided on a side of the box holder (2) close to the cover plate (3); and the cover plate (3) is provided with a plurality of access openings (301) for facing the placement cavities (7) and communicating with the placement cavities (7); The placement cavity (7) comprises a placement portion (71) for placing cosmetics, and a pick-and-place portion (72) for taking and placing cosmetics; a communication port is provided at one end of the pick-and-place portion (72) in the length direction, and the pick-and-place portion (72) is connected to the placement portion (71) through the communication port; the width of the pick-and-place portion (72) is smaller than the width of the pick-and-place portion (72), so that limiting portions (8) are formed on both sides of the communication port along the length direction of the pick-and-place portion (72), and the limiting portions (8) are used to prevent cosmetics from sliding from the placement cavity (7) into the pick-and-place portion (72); The rotating mechanism comprises a rotating part and a driving part for driving the rotating part to rotate, the rotating part is located below the box holder (2), the rotating part comprises a radial bearing (9), the central axis of the radial bearing (9) is parallel to the central axis of the box body (1), and the two ends of the radial bearing (9) along the direction of its central axis are respectively mounted on the box body (1) and the box holder (2); The rotating part further comprises a positioning sleeve (10), the positioning sleeve (10) is sleeved outside the radial bearing (9), the central axis of the positioning sleeve (10) coincides with the central axis of the radial bearing (9), one end of the positioning sleeve (10) along the central axis direction thereof is fixedly connected to the box body (1), and a padding plate (11) for being fixedly connected to the box holder (2) is fixedly connected to the inner ring of the radial bearing (9) on the side close to the box holder (2); a plurality of one-way grooves (12) matching the number of the placement cavities (7) are provided on the side close to the box holder (2) of the positioning sleeve (10). ), the one-way grooves (12) are arranged opposite to the placement cavities (7) one by one, and a plurality of positioning blocks (13) for being embedded in the one-way grooves (12) are fixedly connected to a side of the box holder (2) close to the one-way grooves (12); a side of the one-way groove (12) having the same rotation direction as the box holder (2) is provided with an inclined slope (14), the inclination direction of the slope (14) being inclined from the center of the one-way groove (12) to a direction away from the center of the one-way groove (12), the positioning block (13) being a wedge-shaped block, and the inclined surface of the positioning block (13) being used for sliding cooperation with the slope (14); The driving part comprises a rotating shaft (5) and a 3D rubber part (6), wherein the 3D rubber part (6) is fixedly connected to one end of the rotating shaft (5) in the length direction, and the end of the rotating shaft (5) away from the 3D rubber part (6) is penetrated by a surface cover plate (3) to be fixedly connected to the box holder (2), or the end of the rotating shaft (5) away from the 3D rubber part (6) is penetrated by the surface cover plate (3) and the box holder (2) in sequence to be fixedly connected to the padding plate (11), or the end of the rotating shaft (5) away from the 3D rubber part (6) is penetrated by the surface cover plate (3), the box holder (2) and the padding plate (11) in sequence to be fixedly connected to the inner ring of the radial bearing (9); The placement cavity (7) is coated with an elastic layer.

2. The rotating packaging box according to claim 1, characterized in that: The taking and placing opening (301) is larger than the placing cavity (7).

3. The rotating packaging box according to claim 1, characterized in that: A plurality of cosmetic models are marked on one side of the box holder (2) close to the cover plate (3), and the cosmetic models are located on one side of the placement cavity (7) in the length direction, and each placement cavity (7) corresponds to a cosmetic model. A display port (302) for displaying the cosmetic model is provided on one side of the placement opening (301) in the length direction, and the display port (302) is connected to the placement opening (301).

4. The rotating packaging box according to claim 1, characterized in that: The number of the positioning blocks (13) is less than the number of the placement cavities (7), and the number of the positioning blocks (13) is at least two.

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