Case and tape cartridge

Abstract

The shell comprises a first shell and a second shell which are connected in the thickness direction of the shell, the shell is provided with a notch, the notch is formed in the width side of the shell and penetrates through the two thickness sides of the shell, the shell comprises an arm body and an identification column, and the identification column is arranged in the length direction of the shell. The arm body is adjacent to the notch and deviates from the center of the shell relative to the notch, and the identification column protrudes out of the arm body; the first shell comprises a first arm part, the second shell comprises a second arm part, and the arm body is formed by connecting the first arm part and the second arm part in the thickness direction; at least one of the first arm part and the second arm part is of a cavity shell structure. The tape cartridge comprises the housing. According to the utility model, the strength of the arm body where the identification column is located is improved on the premise of reducing materials.

Description

Technical Field

[0001] This utility model relates to the field of printing consumables technology, specifically to a printing consumable cassette and its outer casing for a label printer. Background Technology

[0002] In the field of printing equipment, the outer casing is typically manufactured using injection molding. To reduce production costs and material usage, designers employ various optimization techniques for the casing structure, such as adjusting wall thickness, arranging stiffeners, incorporating weight-reducing structures, and rationally arranging functional components. These optimizations effectively reduce raw material costs while ensuring the basic functionality of the casing.

[0003] However, in practical applications, it has been found that excessively pursuing material savings may affect the structural strength and overall performance of the product. Especially in areas with high load-bearing stress or requiring precise positioning, if the structural design is not reasonable enough, deformation can easily occur during use due to insufficient local strength, thereby affecting the product's functionality.

[0004] Therefore, when designing the shell structure, it is necessary to make comprehensive trade-offs in multiple aspects such as cost control, process implementation and product performance, so as to ensure that the product can maintain a good cost performance and perform its expected functions stably and reliably. This has become an urgent problem to be solved in this field. Utility Model Content

[0005] The primary objective of this invention is to provide an outer shell that enhances the bending strength of the arm.

[0006] The second objective of this invention is to provide a belt box that enhances the bending strength of the arm body to ensure the effectiveness of the identification column.

[0007] The first objective of this utility model is to provide an outer shell comprising a first shell and a second shell connected along its own thickness direction. The outer shell has a notch, which is opened on the width side of the outer shell and extends through both sides of the thickness of the outer shell. The outer shell includes an arm and an identification post. In the length direction of the outer shell, the arm is adjacent to the notch and the arm is away from the center of the outer shell relative to the notch. At least one identification post protrudes from the arm. The first shell includes a first arm portion, and the second shell includes a second arm portion. The arm is formed by connecting the first arm portion and the second arm portion along the thickness direction. At least one of the first arm portion and the second arm portion is configured as a cavity shell structure.

[0008] As can be seen from the above scheme, the cavity shell structure includes at least two walls facing different directions. The edges of the multiple walls facing different directions are connected to each other to form a shell. The walls are thicker, and because the walls in different directions are connected to each other, the cavity shell structure has better bending strength than a thin single wall plate. The two arms on the first shell and the second shell are joined together to form an arm body, and at least one arm body adopts the cavity shell structure. The arm body has a thicker thickness in the thickness direction of the shell, and the cavity shell structure has better strength, ensuring the bending deformation resistance of the arm body, thereby ensuring that the identification post can continue to be effective in the contact state. It also reduces the overall material usage because of the formation of the cavity shell.

[0009] A further option is to configure one of the first arm and the second arm as a cavity shell structure, and the other of the first arm and the second arm as a wall panel.

[0010] As can be seen from the above, if one arm is set as a cavity shell structure to meet the strength requirements, setting the other arm as a wall panel can further save materials.

[0011] A further embodiment includes a first connecting post and a first hole seat; the first connecting post is connected to one of the first arm and the second arm, and the first hole seat is connected to the other of the first arm and the second arm. The first connecting post and the first hole seat are fitted along the thickness direction, and both the first connecting post and the first hole seat are located inside the arm body.

[0012] As can be seen from the above, when one of the arms is set as a wall panel, the wall panel itself still has poor strength and resistance to deformation. If the wall panel is only adjacent to the cavity shell of the other arm without any other connection, under additional force, such as accidental scraping or being pulled by a finger, the wall panel may still undergo irreversible deformation. Therefore, the structural connection between the wall panel and the cavity shell structure is strengthened by connecting columns and hole seats.

[0013] Another further embodiment includes a second connecting post and a second hole seat; the first shell includes a first root portion connected to the extended beginning of the first arm portion, the second shell includes a second root portion connected to the extended beginning of the second arm portion; the second connecting post is connected to one of the first root portion and the second root portion, the second hole seat is connected to the other of the first root portion and the second root portion, the second connecting post and the second hole seat are fitted along the thickness direction, and both the second connecting post and the second hole seat are located inside the shell.

[0014] As can be seen from the above, in view of the limited space inside the arm body, this utility model sets the second connecting post and the second hole seat in a space that is sufficient and close to the first root and the second root of the arm body, which can also strengthen the connection between the first arm and the second arm.

[0015] A further option is to designate the extended end of the arm body as a bent portion, with the bent portion extending towards the gap relative to the base of the arm body.

[0016] As can be seen from the above, compared with a straight arm, an arm with a bent end provides additional support to the sidewalls of the cavity structure during installation. The bending extension prevents deformation of the shell, has better bending resistance, improves the overall stability of the shell, and can avoid excessive stress concentration during use, thus extending the service life of the cavity structure.

[0017] A further proposed solution is to extend the base along the width of the outer shell and the bent portion along the length of the outer shell.

[0018] A further approach is to have at least one identification post protrude from the bend.

[0019] As can be seen above, a straight arm does not conform to the distribution of some models of identification posts with boxes. An arm with an extended end bent into an "L" shape can also meet the requirements for setting up identification posts while saving materials.

[0020] A further embodiment is that the outer shell includes a sidewall, with a notch formed between the sidewall and the arm body. The sidewall extends in both the width and length directions of the outer shell. The outer shell includes a connecting portion, with the outer surface of the sidewall, the connecting portion, and the arm body connected in sequence. The outer surface of the sidewall, except for the area connected to the connecting portion, is set as a wall surface.

[0021] As can be seen from the above, this design can minimize unnecessary structures on the sidewall surface, making the overall structure more compact, maximizing space utilization, and further saving on shell material.

[0022] A further option is to have a first right-angle portion on the width side, with the first end of the wall surface connected to the first right-angle portion; and / or, to have a second right-angle portion on the length side of the outer casing, with the second end of the wall surface connected to the second right-angle portion.

[0023] As can be seen from the above, the right-angle design makes stress transmission more uniform, avoids stress concentration, and thus improves the service life of the shell structure.

[0024] A further option is that, in the projection along the thickness direction, at least a portion of the wall surface extends along an arc; or, in the projection along the thickness direction, at least a portion of the wall surface extends continuously and tortuously.

[0025] As can be seen from the above, extending the wall surface along a fixed-diameter arc or continuously zigzagging can make the wall surface exhibit a trend of bending and extending from the width side to the length side of the shell, thereby optimizing the outer contour of the shell and enhancing its aesthetic appeal.

[0026] Another further solution is that the outer casing has printing tape roll holes, and in the thickness direction projection, the wall surface is set on the outer periphery of the printing tape roll holes and the covered angle is greater than or equal to 80 degrees.

[0027] As can be seen from the above, with this setting, the wall surface and the printing tape roll hole are concentric or nearly concentric, resulting in a more harmonious visual experience and enhancing the aesthetic appeal.

[0028] The second objective of this utility model is to provide a housing that includes an outer shell, and the outer shell adopts the aforementioned outer shell. Attached Figure Description

[0029] Figure 1 This is a structural diagram of the first embodiment of the outer shell of this utility model from the perspective of the thickness direction.

[0030] Figure 2 This is a structural diagram from a second perspective of the first embodiment of the outer shell of this utility model.

[0031] Figure 3 This is an exploded view of the structure of the first embodiment of the outer shell of this utility model.

[0032] Figure 4 This is a structural diagram of the second shell in the first embodiment of the outer shell of this utility model.

[0033] Figure 5 This is a structural diagram from a third perspective of the first embodiment of the outer shell of this utility model.

[0034] Figure 6 This is a structural diagram from the fourth perspective of the first embodiment of the outer shell of this utility model.

[0035] Figure 7 This is a structural diagram from a first perspective of the second embodiment of the outer shell of this utility model.

[0036] Figure 8 This is an exploded view of the structure of the second embodiment of the outer shell of this utility model.

[0037] Figure 9 This is a structural diagram from a second perspective of the second embodiment of the outer shell of this utility model.

[0038] Figure 10 for Figure 1 Enlarged view of point A in the middle. Detailed Implementation

[0039] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0041] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0043] In the description of the embodiments of this application, the technical terms "center", "length", "width", "thickness", "inner" and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] First embodiment with box, first embodiment with outer shell

[0046] The tape cassette in this embodiment is a label printer printing consumable tape cassette. The tape cassette includes an outer shell and an internal structure disposed within the outer shell. The internal structure is implemented using existing technology.

[0047] See Figure 1 , Figure 1 This is a front view along the thickness direction of the box, such as... Figure 1 As shown, perpendicular to the thickness direction, the direction with the larger dimension on the cassette is the length direction of the cassette and the outer shell, and the direction with the smaller dimension on the cassette is the width direction of the cassette and the outer shell. Figure 1 The side facing the paper shown is the side of the outer casing opposite the bottom wall of the printer's consumables storage area.

[0048] from Figure 1 Viewed along the thickness direction of the outer casing, the cartridge casing has drive shaft holes 100, printing tape roll holes 1001, adhesive tape roll holes 1002, carbon ribbon roll holes 1003, and recycling roll holes 1004 distributed at different positions. The cartridge casing includes a first corner 101 and a second corner 102, which are located diagonally opposite each other, as shown below. Figure 1 As shown, the first corner 101 is located at the upper left corner of the outer casing and the second corner 102 is located at the lower right corner of the outer casing; the outer casing with the box includes a width side 1031 and a length side 1032. The width side 1031 refers to the outermost side of the outer casing in the width direction, away from the first corner 101 and close to the outermost side of the second corner 102. The length side 1032 refers to the outermost side of the outer casing in the length direction, away from the first corner 101 and close to the outermost side of the second corner 102. That is, the second corner 102 is the angle between the width side 1031 and the length side 1032.

[0049] A drive shaft hole 100 is located on the outer casing near the first corner 101, and is used to mount a drive shaft. A printing tape roll hole 1001 is located on the outer casing near the second corner 102, and is used to mount a printing consumable roll. An adhesive tape roll hole 1002 is located relatively close to the outer casing at a third corner, while a carbon ribbon roll hole 1003 is located relatively close to the outer casing at a fourth corner. The third corner is closer to the width side 1031, while the fourth corner is farther from the width side 1032. Figure 1 As shown, the third corner is located at the lower left corner of the casing, while the fourth corner is located at the upper right corner. Adhesive tape roll hole 1002 is used to mount adhesive tape rolls, and carbon ribbon roll hole 1003 is used to mount carbon ribbon rolls. Additionally, a recycling roll hole 1004 is located in the middle of the casing, between the adhesive tape roll hole 1002 and the carbon ribbon roll hole 1003, and is used to mount a recycled carbon ribbon roll.

[0050] In the width direction of the outer casing, a cantilever 1011 is provided on the opposite side to the width side 1031, with the starting end of the cantilever 1011 close to... Figure 1 The fourth corner is shown in the upper right corner, and the cantilever 1011 extends toward the first corner 101. In the width direction, the cantilever 1011 and the location of the roll rewind hole 1004 are spaced apart to form a printhead position 1006 for inserting the printhead. In the length direction, the cantilever 1011 and the location of the drive shaft hole 100 are spaced apart to form a conveyor position. The conveyor position is connected to the printhead position 1006. The consumable extends out from inside the cantilever 1011, passes through the conveyor position, and reaches the drive shaft hole 100. The printhead and the roller located in the printhead position 1006 can press the consumable from the opposite sides of the consumable at the conveyor position.

[0051] See Figure 1 and Figure 2 An arm body 12 is provided on the second corner 102, and four identification posts 17 are provided on and near the arm body 12. The identification posts 17 are used to abut and cooperate with the identification points on the printer. The outer casing is provided with a notch 110, such as Figure 1 As shown, the notch 110 is formed on the width side 1031 of the outer casing, as... Figure 2 As shown, the notch 110 extends through both sides of the thickness of the outer shell along the thickness direction of the outer shell. Due to the notch 110, the aforementioned arm 12 is formed at the adjacent location of the notch 110 in the length direction of the outer shell, and the arm 12 located at the second corner 102 is away from the center of the outer shell in the length direction relative to the notch 110.

[0052] See Figure 1 and Figure 10 In this embodiment, the extended end of the arm body 12 is configured as a bent portion 122. Along the width direction of the outer shell, the end of the arm body 12 connected to the main body of the outer shell is the extended beginning end of the arm body 12, and the end of the arm body 12 located away from the main body of the outer shell on the width side 1031 is the extended end of the arm body 12. The bent portion 122 extends relative to the base 121 of the arm body 12 in a direction close to the opening of the notch 110, and the dividing line between the base 121 and the bent portion 122 is at... Figure 1 As shown by the dashed line L, the base 121 extends along the width direction of the outer shell, while the bent portion 122 extends along the length direction of the outer shell. The bent portion 122 does not refer to its own bending, but rather to its bending relative to the base 121 of the arm body 12. That is, except for the bent and protruding part at the extended end, the part that extends straight along the width direction is the base 121 of the arm body 12.

[0053] Furthermore, the extended end of the arm 12 is flush with the width side 1031. In the prior art, because the arm is designed as a flat thin-walled plate, if the arm is too long, it will further lead to problems such as easy bending or even breakage. Therefore, the arm in the prior art is relatively short and has a certain amount of indentation relative to the width side. However, this also means that the corner where the arm of the tape cartridge is located lacks a structure that can limit the fit with the printer, affecting the installation stability of the tape cartridge. Since the improved arm of this utility model has sufficient bending resistance, even if the extended end of the arm 12 is flush with the width side, there will be no bending deformation problem, and the arm 12 can once again become a limiting structure located at the corner of the tape cartridge, forming a good support fit with the printer, thereby improving the installation stability of the tape cartridge.

[0054] See Figure 1 and Figure 2In this embodiment, one identification post 17 is disposed outside the arm body 12, two identification posts 17 are disposed on the base 121, and one identification post 17 is disposed on the bend 122. Specifically, the arm body 12 includes a surface 141, which is a surface on the arm body 12 that is used to contact the printer identification point in the thickness direction of the outer shell. The surface 141 extends beyond the beginning of the extension of the arm body 12, and four cylindrical identification posts 17 protrude from the surface 141 along the thickness direction of the outer shell. With this arrangement, the distance between the identification posts 17 and the surface 141 protruding from the printer identification point in the thickness direction of the arm body is reduced. Thus, when the identification posts are shorter, there is better bending resistance.

[0055] See Figure 3 and Figure 4 The outer shell includes a first shell 18 and a second shell 19 connected along their respective thickness directions. The first shell 18 is a one-piece molded plastic shell, and the second shell 19 is also a one-piece molded plastic shell. The first shell 18 includes a first arm 13, and the second shell 19 includes a second arm 14. The arm body 12 is formed by joining the first arm 13 and the second arm 14 together along their thickness directions. In this embodiment, the first arm 13 is configured as a wall panel, while the second arm 14 is configured as a cavity shell structure.

[0056] Among them, such as Figure 3 As shown, the wall panel consists of only one first wall extending along a plane perpendicular to the thickness direction of the outer shell.

[0057] In this application, the cavity shell structure includes at least two walls facing different directions, multiple walls are connected to form a shell, and a cavity is formed between the multiple walls, open at least in the thickness direction of the shell. Wherein, as Figure 4 As shown, in this embodiment, the cavity shell structure of the second arm 14 includes a second wall extending along a plane perpendicular to the thickness direction of the shell, and also includes a peripheral wall extending from the outer peripheral edge of the second wall along the thickness direction of the shell toward the first arm 13. The second wall and the peripheral wall are connected to form a shell, and a cavity is formed between the second wall and the peripheral wall that opens toward the first wall.

[0058] See Figure 3 The first housing 18 also includes a first connecting post 151, which is connected to the surface of the first wall of the first arm 13 and extends toward the second arm 14 along the thickness direction of the housing. See also Figure 4 The second shell 19 also includes a cylindrical first hole seat 150, in which a second connecting hole 152 is formed. The first hole seat 150 connects between the second wall and the peripheral wall of the second arm 14. Further, the first connecting post 151 and the first hole seat 150 are connected to the straight-extending end of the base of the arm 12.

[0059] When the first shell 18 and the second shell 19 are connected along the thickness direction of the shell, the first arm 13 and the second arm 14 are also connected along the thickness direction of the shell to form the arm body 12. The first connecting post 151 and the first connecting hole 152 of the first hole seat 150 are inserted and fitted along the thickness direction, and the first connecting post 151 and the first hole seat 150 are located inside the arm body 12. The first wall of the first arm 13 covers the cavity of the second arm 14, and the two together form an arm body 12 whose cavity is completely sealed. The arm body 12 has sufficient thickness and a bent and connected wall to provide sufficient bending strength, and can also reduce the amount of material used for injection molding by forming a cavity.

[0060] Additionally, see Figure 3 and Figure 4 The outer shell includes a sidewall, which includes a first sidewall 189 on the first shell 18 and a second sidewall 199 on the second shell 19. The first sidewall 189 and the second sidewall 199 are joined together to form a sidewall, and a notch 110 is formed between the sidewall and the arm body 12.

[0061] See Figure 5 and Figure 6 The outer shell has a first right-angle portion 1091 on the width side 1031 and a second right-angle portion 1092 on the length side 1032. The sidewall extends in both the width and length directions of the outer shell and extends between the first right-angle portion 1091 and the second right-angle portion 1092. The outer shell includes a connecting portion 129. The outer surface of the sidewall, the connecting portion, and the arm are connected in sequence. The outer surface of the sidewall, except for the area connected to the connecting portion 129, is provided with the aforementioned wall surface.

[0062] Furthermore, the wall surface includes a first wall surface 1891 located on the surface of the first sidewall 189 and a second wall surface 1991 located on the surface of the second sidewall 199.

[0063] See Figure 1 and Figure 6 The second wall surface 1991 extends along an arc, and this arc is concentric with the printing tape roll hole 1001. See also... Figure 5 and Figure 6 The first end of the first wall surface 1891 and the first end of the second wall surface 1991 are both connected to the first right-angle portion 1091. However, since the second right-angle portion 1092 is only provided on the first shell, only the second end of the first wall surface 1891 is connected to the second right-angle portion 1092. See also... Figure 1 In the projection along the thickness direction, the first wall surface 1891 and the second wall surface 1991 are disposed on the outer periphery of the printing tape roll hole 1001 and the covered angle α is greater than or equal to 45 degrees to make the visual perception of the arc surface more obvious. In this embodiment, the angle α is 82 degrees.

[0064] Second embodiment with box, second embodiment with outer shell

[0065] The actual size of the specific model corresponding to the cassette in this embodiment is smaller than the actual size of the specific model corresponding to the cassette in the first embodiment.

[0066] See Figure 7 and Figure 8 Unlike the first embodiment of the outer shell, in this embodiment, the arm 22 extends in a straight line along the width of the outer shell and does not have the bent portion 122 in the first embodiment; in this embodiment, both the first arm portion 23 and the second arm portion 24 adopt a cavity shell structure; in this embodiment, only one identification post is included connected to the second arm portion 24.

[0067] In this embodiment, the first arm portion 23 and the second arm portion 24 are not connected to the first connecting post and the first connecting hole, but the outer shell of this embodiment includes a second connecting post 251 and a second hole seat 250 disposed outside the arm body 22. Specifically, the first shell includes a first root portion 261, which is connected to the extended beginning of the first arm portion 23, and the second connecting post 251 extends from the surface of the first root portion 261 toward the second shell along the thickness direction; the second shell includes a second root portion 262, which is connected to the extended beginning of the second arm portion 24, and the cavity of the second root portion 262 is connected to the second hole seat 250, in which a second connecting hole 252 toward the first shell is provided. The second connecting post 251 and the second connecting hole 252 are inserted and fitted along the thickness direction of the outer shell, and after the first shell and the second shell are connected to form an outer shell, both the second connecting post 251 and the second connecting hole 252 are located inside the outer shell. When the cartridge is a smaller model and both arms use a cavity structure, the limited space inside the arm cavity makes it difficult to install a large mounting hole. To address this, the second connecting post 251 and the second mounting hole 250 are respectively positioned in a space that is sufficient and close to the first root 261 and the second root 262 of the arm body 22, which can also strengthen the connection between the first arm 23 and the second arm 24.

[0068] Additionally, see Figure 9 In this embodiment, the first wall surface 289 on the first sidewall of the first shell includes a first arcuate portion 2891, a first flat portion 2892, a second arcuate portion 2893, and a second flat portion 2894 that are sequentially bent and connected from a first end near its width side 2031 to a second end near its length side 2032. Under this configuration, the first wall surface 289 extends continuously and tortuously in the projection in the thickness direction.

[0069] In other embodiments, based on the first or second embodiment, the connecting posts and connecting holes are interchanged between the first and second shells. Specifically, a plurality of connecting holes are provided on the outer peripheral surface of the first shell, and the connecting holes are cylindrical and penetrating; correspondingly, the second shell is provided with connecting posts that correspond one-to-one with the connecting holes, the outer diameter of the connecting post is smaller than the inner diameter of the connecting hole, and the end of the connecting post is provided with a chamfered structure for easy insertion. Through the above arrangement, the reliability of the connection between the first shell and the second shell is improved.

[0070] In other embodiments, the arm body is generally in a straight line shape, and both the first and second arm sections adopt a cavity shell structure. The inner wall of the first arm section has an inwardly extending first connecting post, and the inner wall of the second arm section has a first hole seat that mates with the first connecting post. The first connecting post and the first hole seat are fixedly connected by a mating mechanism. This structure makes full use of the internal space of the arm body and improves the strength of the connection structure.

[0071] In other embodiments, a predetermined distance is provided between the extended end of the arm and the width side of the housing in the width direction, and the predetermined distance extends along the length direction of the arm. This arrangement ensures both installation leeway and avoids potential interference between components.

[0072] In other embodiments, the bend may extend along an inclined direction, forming an acute angle with the length direction of the outer shell, and the transition of the bend is provided with a rounded transition structure. This structure optimizes the stress distribution of the bend.

[0073] In other embodiments, the arm body includes a bent portion, but the bent portion is not connected to the identification post.

[0074] In other embodiments, a buckle and a protrusion are respectively provided on the outer surfaces of the first arm and the second arm, and the first arm and the second arm are connected by the engagement of the buckle and the protrusion. This connection method facilitates assembly and disassembly and has good stability.

[0075] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shell comprising a first shell and a second shell connected along a thickness direction of the shell; characterized in that: the shell is provided with a notch, the notch is formed on a width side of the shell and penetrates through both sides of the thickness of the shell, the shell has an arm body and at least one identification column, the arm body is adjacent to the notch in a length direction of the shell, and the at least one identification column protrudes from the arm body; the first shell comprises a first arm portion, the second shell comprises a second arm portion, and the arm body is connected by the first arm portion and the second arm portion along the thickness direction; at least one of the first arm portion and the second arm portion is provided as a cavity shell structure. 2.The shell according to claim 1, characterized in that: one of the first arm portion and the second arm portion is provided as a cavity shell structure, and the other of the first arm portion and the second arm portion is provided as a wall plate. 3.The shell according to claim 2, characterized in that: further comprising a first connecting column and a first hole seat; the first connecting column is connected to one of the first arm portion and the second arm portion, the first hole seat is connected to the other of the first arm portion and the second arm portion, the first connecting column cooperates with the first hole seat along the thickness direction, and the first connecting column and the first hole seat are both located inside the arm body. 4.The shell according to claim 1, characterized in that: further comprising a second connecting column and a second hole seat; the first shell comprises a first root portion connected to an extension starting end of the first arm portion, and the second shell comprises a second root portion connected to an extension starting end of the second arm portion; the second connecting column is connected to one of the first root portion and the second root portion, the second hole seat is connected to the other of the first root portion and the second root portion, the second connecting column cooperates with the second hole seat along the thickness direction, and the second connecting column and the second hole seat are both located inside the shell. 5.The shell according to any one of claims 1 to 4, characterized in that: an extension end of the arm body is provided as a bending portion, and the bending portion extends towards the notch relative to a base portion of the arm body. 6.The shell according to claim 5, characterized in that: at least one of the identification columns protrudes from the bending portion. 7.The shell according to claim 5, characterized in that: the base portion extends along a width direction of the shell, and the bending portion extends along a length direction of the shell. 8.The shell according to any one of claims 1 to 4, characterized in that: the shell comprises a side wall, the notch is formed between the side wall and the arm body, the side wall has an extension distance in both the width direction of the shell and the length direction of the shell; the shell comprises a connecting portion, a surface side of the side wall, the connecting portion and the arm body are sequentially connected; a wall surface is provided on the surface side of the side wall except for an area connected to the connecting portion. 9.The shell according to claim 8, characterized in that: the width side is provided with a first right angle portion, a first end of the wall surface is connected to the first right angle portion; and / or, The length side of the housing is provided with a second right angle portion, and a second end of the wall surface is connected to the second right angle portion.

10. The housing according to claim 9, wherein: At least a portion of the wall surface extends along a circular arc line in a projection in the thickness direction; Or, At least a portion of the wall surface continuously and tortuously extends in the projection in the thickness direction.

11. The housing according to claim 9, wherein: The housing is provided with a print tape winding hole, and the wall surface is disposed at an outer periphery of the print tape winding hole in the projection in the thickness direction, and an angle of coverage is greater than or equal to 80 degrees.

12. A cassette comprising a housing, characterized in that The housing is the housing according to any one of claims 1 to 11.

Images