Packaging structure

Abstract

The utility model provides a packaging structure which comprises a shell, a cover body and a locking structure. The cover body is rotatably or separably buckled on the shell; at least one of the shell and the cover body is provided with an alignment groove. The locking structure comprises an operation part and a locking plate. The operation part is at least partially attached to the outer side surface of the shell or the cover body. The locking plate is in a plane shape and comprises an alignment part. And the locking plate is in transmission connection with the operation part, is rotatably arranged in the shell or the cover body, is parallel to one side surface of the shell or the cover body, and corresponds to the position of the alignment groove. Wherein the operation part drives the locking plate to rotate, so that the position of the alignment part is aligned with the position of the alignment groove, the shell and the cover body are locked, or the position of the alignment part is staggered with the position of the alignment groove, and the shell and the cover body are unlocked. According to the embodiment of the utility model, the influence on stacked transportation of a plurality of packaging structures is small, and the stability of the packaging structures is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to packaging storage structure technical field, especially a packaging structure. BACKGROUND

[0002] In the field of commodity packaging technology, or when the packaging box is used daily, the packaging structure needs to be locked in some cases. For example, it can improve the protection of commodity packaging, reduce the risk of falling of the goods inside the packaging structure, or avoid the situation that children mistakenly contact medicines or dangerous goods.

[0003] At present, the packaging structure with locking function usually sets a lock on the outside of the packaging structure, and cooperates with a lock made of plastic or metal to realize the locking function. However, in this locking structure, the lock and the lock are protruded relative to the surface of the packaging structure, which is not conducive to stacking and transporting multiple packaging structures, and the protruding position is easy to be damaged by collision. On the other hand, for conventional paper packaging structures, the lock made of plastic or metal is pasted on the outside of the packaging structure, and the combination ability with the packaging structure is poor, which is easy to damage and fall off.

[0004] The content of the background section merely represents the best of the inventor's knowledge and does not necessarily represent the state of the art in the field. INVENTION CONTENTS

[0005] In view of one or more defects in the prior art, the utility model provides a packaging structure, which comprises:

[0006] A shell;

[0007] A cover body rotatably or detachably buckled on the shell; at least one of the shell or the cover body is provided with an alignment slot;

[0008] A locking structure, comprising:

[0009] An operation part at least partially attached to the outer surface of the shell or the cover body;

[0010] A lock plate in a planar shape, comprising an alignment part; the lock plate is in transmission connection with the operation part, rotatably arranged in the interior of the shell or the cover body, and parallel to one side surface of the shell or the cover body, and corresponding to the position of the alignment slot;

[0011] Wherein, the operation part drives the rotation of the lock plate, so that the alignment part is aligned with the position of the alignment slot, and the shell and the cover body are locked, or the alignment part is misaligned with the position of the alignment slot, and the shell and the cover body are unlocked.

[0012] According to one aspect of the present invention, the locking structure further includes:

[0013] The outer shell defines a cavity, the cavity including a through groove whose position corresponds to the position of the alignment groove; the locking piece is rotatably disposed within the cavity.

[0014] According to one aspect of the present invention, the locking structure is fixedly connected to one of the housing or the cover, and the alignment groove is disposed on the other of the housing or the cover; during the rotation of the locking piece, the alignment part extends out of the through groove and aligns with the position of the alignment groove, or retracts from the through groove and is misaligned with the position of the alignment groove.

[0015] According to one aspect of the present invention, the locking plate further includes:

[0016] A rotating shaft through hole, wherein the locking piece is sleeved on a rotating shaft at the position of the rotating shaft through hole;

[0017] The missing portion, the alignment portion and the missing portion are located circumferentially in the through hole of the rotating shaft; during the rotation of the locking piece, the alignment portion and the missing portion correspond to the through groove in sequence; when the alignment portion corresponds to the through groove, the alignment portion extends to the outside of the through groove and engages with the alignment groove; when the missing portion corresponds to the through groove, the missing portion separates from the alignment groove.

[0018] According to one aspect of the present invention, the locking structure further includes:

[0019] A transmission mechanism is disposed inside the cavity; the operating part is connected to the locking plate via the transmission mechanism.

[0020] According to one aspect of the present invention, the locking structure further includes:

[0021] A first rotating shaft is vertically disposed on a first plane; wherein, the first plane is a side surface of the outer casing parallel to the locking piece;

[0022] The second rotating shaft is perpendicularly disposed on the first plane;

[0023] The transmission mechanism includes:

[0024] A first transmission gear is rotatably disposed around the first rotating shaft;

[0025] The second transmission gear is rotatably disposed around the second shaft and meshes with the first transmission gear;

[0026] The operating part is fixedly connected to the first transmission gear; the locking plate is fixedly connected to the second transmission gear.

[0027] According to one aspect of the present invention, the operating part includes:

[0028] A connecting shaft is fixedly connected to the first transmission gear and is coaxial with the first rotating shaft;

[0029] A handle, which is fixedly connected to the connecting shaft and extends to the outer surface of the housing or the cover.

[0030] According to one aspect of the present invention, the connecting shaft is partially engaged with the first transmission gear; the locking plate is partially engaged with the second transmission gear.

[0031] According to one aspect of the present invention, the second transmission gear is partially embedded in the locking plate, and the locking plate is located between the first plane and the second transmission gear; the locking structure further includes:

[0032] A shim is disposed between the first transmission gear and the first plane to match the heights of the first transmission gear and the second transmission gear relative to the first plane.

[0033] According to one aspect of the present invention, a support portion of uniform thickness is provided on the inner circumferential side of the outer shell, and the thickness of the support portion is equal to the height of the transmission mechanism in the direction perpendicular to the first plane.

[0034] Compared with existing technologies, the embodiments of this utility model provide a packaging structure in which the locking structure has an operating part attached to the outer surface of the shell or cover, and a locking piece located inside the shell or cover. The operating part drives the locking piece to rotate, locking or unlocking the shell and cover. The locking structure in this embodiment has minimal impact on the external dimensions of the packaging structure and minimal impact on the stacking and transportation of multiple packaging structures. Furthermore, because the locking piece is located inside the shell or cover, it is less susceptible to external structural influences during locking or unlocking, resulting in higher stability of the packaging structure. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0036] Figure 1 These are assembly diagrams of the packaging structure in some embodiments of this utility model;

[0037] Figure 2This is an assembly diagram of the locking structure in some embodiments of this utility model;

[0038] Figure 3 This is a schematic diagram of the packaging structure in some embodiments of this utility model. Detailed Implementation

[0039] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0040] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0044] The embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0045] Figure 1 A schematic diagram of the assembly of the packaging structure 100 according to some embodiments of the present invention is shown. Figure 2 A schematic diagram of the assembly of the locking structure 130 according to some embodiments of the present invention is shown. The following is in conjunction with... Figure 1 and Figure 2 The packaging structure 100 is described.

[0046] like Figure 1 As shown, the packaging structure 100 includes a shell 110, a cover 120, and a locking structure 130. The cover 120 is rotatably or detachably fastened to the shell 110. For example, the cover 120 and the shell 110 are connected by a pivot; the cover 120 can be flipped relative to the shell 110 and fastened to it, either closing or opening the space of the shell 110. In other embodiments, the cover 120 is detachable from the shell 110; when the cover 120 is fastened to the shell 110, it closes the space of the shell 110; when the cover 120 is detached from the shell 110, it opens the space of the shell 110.

[0047] At least one of the housing 110 or the cover 120 is provided with an alignment groove 111. The alignment groove 111 is used to engage with the locking structure 130. In some embodiments, the sidewall of the housing 110 has a double-layer structure; for example, the housing 110 is made of folded paper material, and a double-layer structure is formed at at least one sidewall of the housing 110. The alignment groove 111 is formed on the sidewall of the double-layer structure of the housing 110 and extends into the interior of the double-layer structure. In some embodiments, the alignment groove 111 may penetrate the sidewall of the housing 110 or the cover 120 and extend to the exterior of the housing 110 or the cover 120. The specific structure and its engagement method with the locking structure 130 are then described. Figure 2 Please provide an explanation.

[0048] like Figure 2 As shown, the locking structure 130 includes an operating part 131 and a locking piece 132. At least a portion of the operating part 131 is attached to the outer surface of the housing 110 or the cover 120 to allow the user to operate the locking structure 130 from the outside of the housing 110 or the cover 120.

[0049] The locking piece 132 is generally planar, for example, made from cardboard or greyboard. The locking piece 132 includes an alignment portion 1321, which engages with the alignment groove 111. The locking piece 132 is kinetically connected to the operating portion 131. The locking piece 132 is rotatably disposed inside the housing 110 or cover 120 and parallel to one side of the housing 110 or cover 120. The planar shape of the locking piece 132, and its parallelity to the side of the housing 110 or cover 120, reduces the space occupied by the locking structure 130 and simplifies the structure of the packaging structure 100. The position of the locking piece 132 corresponds to the position of the alignment groove 111. For example, the locking piece 132 is disposed inside the cover 120, the alignment groove 111 is disposed on the housing 110, and the locking piece 132 is positioned close to the alignment groove 111. When the locking piece 132 rotates, it engages with the alignment groove 111 to lock or unlock.

[0050] Specifically, the operating unit 131 drives the locking piece 132 to rotate, causing the position of the alignment part 1321 relative to the alignment groove 111 to change. When the position of the alignment part 1321 is rotated to align with the alignment groove 111, the housing 110 and the cover 120 can be locked. When the position of the alignment part 1321 is rotated to be misaligned with the alignment groove 111, the housing 110 and the cover 120 can be locked.

[0051] In this embodiment, the locking tab 132 is located inside the housing 110 or the cover 120, making it less susceptible to external environmental and structural influences, which helps improve the structural stability of the packaging structure 100. A portion of the operating part 131 is attached to the outer surface of the housing 110 or the cover 120, having minimal impact on the structural dimensions of the packaging structure 100, which is beneficial for stacking, transporting, or storing the packaging structure 100. Furthermore, the locking tab 132 in this application is generally flat and can be made from paper material, simplifying the processing and eliminating the need for injection molding, thus reducing processing costs.

[0052] See Figure 2 According to a preferred embodiment of the present invention, the locking structure 130 further includes a housing 133. The housing 133 defines a cavity, the cavity including a through groove 1331, the position of which corresponds to the position of the alignment groove 111. The locking piece 132 is rotatably disposed within the cavity. In this embodiment, the locking structure 130 can be integrated into one unit using the housing 133. After the locking structure 130 is assembled, as shown... Figure 2 As shown in the leftmost shape, it is roughly a flat cuboid shape. The locking structure 130 can be assembled into the packaging structure 100, which helps to reduce the assembly difficulty of the packaging structure 100 and increase the applicability of the locking structure 130.

[0053] In some embodiments, the outer shell 133 may be made of folded cardboard to house the locking piece 132 within the cavity, thereby protecting the locking piece 132 and defining its position, thus improving the structural stability of the locking structure 130.

[0054] In a preferred embodiment of this invention, the locking structure 130 is fixedly connected to one of the housing 110 or the cover 120, and the alignment groove 111 is provided on the other of the housing 110 or the cover 120. For example, the locking structure 130 fits against the inner side of the cover 120 facing the housing 110, and the alignment groove 111 is provided on the housing 110. Or, in some other embodiments, the opposite is true.

[0055] During the rotation of the locking piece 132, the aligning part 1321 can extend from the position of the through groove 1331 to the outside of the housing 133 and align with the position of the aligning groove 111, thereby locking the housing 110 and the cover 120. Alternatively, the aligning part 1321 can retract to the inside of the housing 133 and be misaligned with the aligning groove 111, thereby unlocking the housing 110 and the cover 120.

[0056] According to a preferred embodiment of the present invention, see [link to preferred embodiment]. Figure 2 The locking piece 132 includes a pivot hole 1322 and a notch 1323. The locking piece 132 is sleeved onto a rotating shaft (e.g., at the position of the pivot hole 1322). Figure 2The second rotating shaft 136 is mounted on the housing 133. Specifically, in some embodiments, the rotating shaft is attached to the inside of the housing 133, and the locking piece 132 is sleeved on the rotating shaft through the rotating shaft through hole 1322 and can rotate around the rotating shaft.

[0057] The alignment portion 1321 and the missing portion 1323 are located circumferentially in the through hole 1322 of the rotating shaft. During the rotation of the locking piece 132 around the rotating shaft, the positions of the alignment portion 1321 and the missing portion 1323 rotate accordingly, and the alignment portion 1321 and the missing portion 1323 sequentially correspond to the through groove 1331. When the alignment portion 1321 corresponds to the through groove 1331, the alignment portion 1321 extends to the outside of the through groove 1331 and engages with the alignment groove 111. When the missing portion 1323 corresponds to the through groove 1331, due to the secure structure of the missing portion 1323, the missing portion 1323 separates from the alignment groove 111, releasing the lock.

[0058] In a preferred embodiment of this invention, the locking structure 130 further includes a transmission mechanism 134. See also... Figure 2 The transmission mechanism 134 is disposed inside the cavity of the housing 133, and the operating part 131 is connected to the locking plate 132 through the transmission mechanism 134. The transmission mechanism 134 optimizes the position of the operating part 131 and the locking plate 132, and optimizes the transmission ratio between the operating part 131 and the locking plate 132, thereby improving the convenience of use for the user.

[0059] like Figure 2 As shown, according to a specific embodiment of the present invention, the locking structure 130 further includes a first rotating shaft 135 and a second rotating shaft 136. The first rotating shaft 135 and the second rotating shaft 136 are perpendicular to a first plane 1332, wherein the first plane 1332 represents a side of the housing 133 parallel to the locking piece 132, for example... Figure 2 The lower side of the housing 133 shown.

[0060] In some embodiments, the first pivot 135 and the second pivot 136 can be cut from cardboard or greyboard into an auxiliary shape and pasted at a predetermined position on the first plane 1332 of the housing 133. The height of the first pivot 135 and the second pivot 136 can be set to be approximately equal to or slightly greater than the thickness of the transmission mechanism 134, so as to reduce the thickness dimension of the locking structure 130 and reduce the encroachment of the locking structure 130 on the accommodating space of the packaging structure 100.

[0061] See Figure 2The transmission mechanism 134 includes a first transmission gear 1341 and a second transmission gear 1342. The first transmission gear 1341 is rotatably mounted around a first rotating shaft 135. The second transmission gear 1342 is rotatably mounted around a second rotating shaft 136, and the second transmission gear 1342 meshes with the first transmission gear 1341. In this embodiment, the operating part 131 is fixedly connected to the first transmission gear 1341, and the locking plate 132 is fixedly connected to the second transmission gear 1342. When the operating part 131 drives the first transmission gear 1341 to rotate around the first rotating shaft 135, the first transmission gear 1341 and the second transmission gear 1342 mesh, causing the locking plate 132 to rotate.

[0062] In some embodiments, the gear ratio of the first transmission gear 1341 and the second transmission gear 1342 can be adjusted to change the transmission ratio of the transmission mechanism 134 and improve the user's operating experience. For example, if the transmission ratio of the transmission mechanism 134 is 1:2, when the operating part 131 rotates half a revolution, the locking plate 132 rotates one revolution, that is, at least one locking and unlocking process is completed.

[0063] The operating unit 131 includes a connecting shaft 1311 and a handle 1312 (see...) Figure 1 and Figure 3 The connecting shaft 1311 and the first transmission gear 1341 are fixedly connected and coaxial with the first rotating shaft 135. In this embodiment, the operating part 131 moves around the axis of the first rotating shaft 135, which can reduce the lateral extrusion force of the first transmission gear 1341 and the first rotating shaft 135 and improve the service life of the packaging structure 100.

[0064] The handle 1312 is fixedly connected to the connecting shaft 1311, and the handle 1312 extends to the offset surface of the housing 110 or cover 120. The handle 1312 can be made from cardboard, for example... Figure 1 and Figure 3 As shown, the connecting shaft 1311 extends to the outer surface of the cover 120. The handle 1312 is bonded to the connecting shaft 1311, fitting against the outer surface of the cover 120, and can rotate about the first pivot 135. Preferably, an indicator area can be provided on the handle 1312 and the outer surface of the housing 110 or the cover 120 to indicate the locked position of the locking structure 130. For example, when the handle 1312 is rotated to the position corresponding to the indicator area, it indicates that the locking structure 130 is locked or unlocked.

[0065] In some embodiments, the connecting shaft 1311 and the first transmission gear 1341 are engaged. The locking plate 132 and the second transmission gear 1342 are engaged. For example Figure 2As shown, the first transmission gear 1341 has a groove, and the shape of the groove matches the shape of the connecting shaft 1311. The connecting shaft 1311 is partially embedded in the groove and is fixedly connected to the first transmission gear 1341. Correspondingly, as... Figure 2 As shown, a groove can be formed on the locking plate 132, and the shape of the groove matches the shape of the second transmission gear 1342. The second transmission gear 1342 is partially embedded in the groove and fixedly connected to the locking plate 132. This is beneficial to improving the connection strength between the second transmission gear 1342 and the locking plate 132, and also beneficial to reducing the thickness of the transmission mechanism 134, reducing the structural size of the locking structure 130 and the impact on the accommodating space of the packaging structure 100.

[0066] In some embodiments, the second transmission gear 1342 is partially embedded in the locking plate 132, which is disposed between the first planes 1332. For example, the second rotating shaft 136 is attached to the first plane 1332, the second transmission gear 1342 is partially embedded in the locking plate 132, and the locking plate 132 and the second transmission gear 1342 are sleeved on the second rotating shaft 136 and are rotatable around the second rotating shaft 136.

[0067] The locking structure 130 also includes a shim 137, which is disposed between the first transmission gear 1341 and the first plane 1332. The shim 137 can be used to adjust the height of the first transmission gear 1341 so that the heights of the first transmission gear 1341 and the second transmission gear 1342 relative to the first plane 1332 are matched. In some embodiments, the shim 137 can be a circular piece formed by cutting cardboard and connected to the first rotating shaft 135. The shim 137 can be disposed between the first rotating shaft 135 and the first piece 1332, and the shim 137 is configured not to interfere with the locking piece 132.

[0068] See Figure 2 In some embodiments, a support portion 1333 of uniform thickness is provided circumferentially on the inner side of the outer casing 133. The support portion 1333 may be located at a corner of the outer casing 133. The thickness of the support portion 1333 is equal to the height of the transmission mechanism 134 in the direction perpendicular to the first plane 1332. Alternatively, the thickness of the support portion 1333 may be slightly greater than the height of the transmission mechanism 134 in the direction perpendicular to the first plane 1332. The support portion 1333 helps to improve the structural stability of the locking structure 130.

[0069] Finally, it should be noted that the above descriptions are merely embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A packaging structure, characterized by, The packaging structure comprises: a shell; a cover rotatably or detachably buckled on the shell; at least one of the shell or the cover is provided with a positioning slot; a locking structure comprising: an operating part at least partially attached to the outer surface of the shell or the cover; a lock plate in a planar shape, comprising a positioning part; the lock plate is in transmission connection with the operating part, rotatably arranged inside the shell or the cover, parallel to one side of the shell or the cover, and corresponding to the position of the positioning slot; wherein the operating part drives the lock plate to rotate, so that the positioning part is aligned with the position of the positioning slot, locking the shell and the cover, or the positioning part is misaligned with the position of the positioning slot, unlocking the shell and the cover.

2. The packaging structure of claim 1, wherein The locking structure further comprises: an outer shell defining a cavity, the cavity comprising a through slot corresponding to the position of the positioning slot; the lock plate is rotatably arranged in the cavity.

3. The packaging structure of claim 2, wherein One of the locking structure and the shell or the cover is fixedly connected, and the positioning slot is arranged on the other one of the shell or the cover; during the rotation of the lock plate, the positioning part is extended from the through slot and aligned with the position of the positioning slot, or retracted from the through slot and misaligned with the position of the positioning slot.

4. The packaging structure of claim 2, wherein The lock plate further comprises: a rotating shaft through hole, the lock plate is sleeved on a rotating shaft at the position of the rotating shaft through hole; a vacancy part, the positioning part and the vacancy part are located in the circumferential direction of the rotating shaft through hole; during the rotation of the lock plate, the positioning part and the vacancy part correspond to the through slot in turn; when the positioning part corresponds to the through slot, the positioning part extends to the outside of the through slot and is clamped with the positioning slot; when the vacancy part corresponds to the through slot, the vacancy part is separated from the positioning slot.

5. The packaging structure of claim 2, wherein The locking structure further comprises: a transmission mechanism arranged inside the cavity; the operating part is in transmission connection with the lock plate through the transmission mechanism.

6. The packaging structure of claim 5, wherein The locking structure further comprises: a first rotating shaft vertically arranged on a first plane; wherein the first plane is one side of the outer shell parallel to the lock plate; a second rotating shaft vertically arranged on the first plane; The transmission mechanism comprises: a first transmission gear rotatably arranged around the first rotating shaft; a second transmission gear rotatably arranged around the second rotating shaft and meshing with the first transmission gear; wherein the operating part is fixedly connected with the first transmission gear; the lock plate is fixedly connected with the second transmission gear.

7. The packaging structure of claim 6, wherein The operating part comprises: a connecting shaft fixedly connected with the first transmission gear and coaxial with the first rotating shaft; a handle fixedly connected with the connecting shaft and extending to the outer surface of the shell or the cover.

8. The packaging structure of claim 7, wherein The connecting shaft is partially embedded with the first transmission gear; the lock plate is partially embedded with the second transmission gear.

9. The packaging structure of claim 6, wherein The second transmission gear is embedded in the lock plate between the first plane and the second transmission gear; The lock structure further comprises: A gasket is arranged between the first transmission gear and the first plane to match the height of the first transmission gear and the second transmission gear relative to the first plane.

10. The packaging structure according to any one of claims 6-9, characterized in that, The inner side of the shell is circumferentially provided with a support part with uniform thickness, and the thickness of the support part is equal to the height of the transmission mechanism in the direction perpendicular to the first plane.

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