Cartridge and method for thermally welding sheet

Abstract

The invention provides a cartridge capable of reducing the possibility of generating a gap between a liquid introduction part and a liquid supply part of a printing apparatus, and a thermal deposition method of a sheet. The cartridge is provided with: a liquid storage part; a liquid supply unit; and a housing part including a wall part having an opening connected to the liquid supply part, a plurality of welding protrusions arranged along an outer edge of the opening in a state of being spaced apart from each other, and a plurality of thermal welding parts arranged along the outer edge of the opening in a state of being spaced apart from each other. The plurality of thermal welding parts are attached to a part of the surface of the plurality of welding convex parts and are arranged in a state of being separated from each other. And a sheet that covers the opening, the plurality of welded protrusions, and the plurality of heat-welded portions and is bonded to the plurality of welded protrusions in a peelable manner, the plurality of welded protrusions being portions that are not melted by heat welding among protrusions formed from a heat-weldable material, and the plurality of heat-weldable portions being bonded to the plurality of welded protrusions in a peelable manner. Each of the plurality of heat-welded portions is a portion formed by melting due to heat welding in the protruding portion before heat welding with the sheet, and a portion of the plurality of heat-welded portions is in contact with the sheet.

Description

Technical Field

[0001] The present invention relates to a box and a method for heat-fusion bonding of a sheet. Background Art

[0002] Patent document 1 discloses a box having a film arranged on an adapter. The adapter is mounted on a liquid storage body that stores ink. The adapter is provided with a liquid supply unit, which is a tubular component protruding from the liquid storage body, on the inner side. The adapter engages with the printing device when the box is mounted on the printing device. The liquid supply unit supplies ink to the outside. An opening is formed on the bottom wall of the adapter. The liquid supply unit is arranged in such a way that the central axis of the liquid supply unit passes through the opening. The liquid supply unit is provided with a valve mechanism that opens the valve by inserting the liquid inlet unit of the printing device and closes the valve when the liquid inlet unit is not inserted. The liquid inlet unit of the printing device is inserted into the liquid supply unit, and the ink inside the liquid storage body is supplied to the printing device.

[0003] The film is mounted on the bottom wall in a state of covering the opening of the adapter. Specifically, a convex portion, i.e., a first mounting portion, is formed on the bottom wall of the adapter. The first mounting portion surrounds the opening. The film is in a state of covering the first mounting portion and the opening. The film is mounted on the box by welding the film and the first mounting portion. The user peels off the film from the opening before mounting the box on the printing device.

[0004] Generally speaking, in heat welding, it is known that the portion heated by welding may be deformed due to melting. In the box of Patent Document 1, it is considered that heat welding is performed by the welding component in a state where the first mounting portion as a protrusion is covered by a film, thereby preventing the wall of the adapter without a protrusion from being dented due to melting. On the other hand, in the box of Patent Document 1, the portion of the first mounting portion in contact with the film is melted by the welding component due to heat welding, and the melted portion may flow into the step difference portion of the first mounting portion. Since the step difference portion is not directly heated by the welding component, the temperature during heat welding is lower than that of the portion of the first mounting portion contacting the welding component. Therefore, the portion that melts and flows into the step difference portion may solidify in an unstable state without being bonded to the step difference portion. When the user peels the film off the adapter, the portion that solidifies in a state without being bonded to the step difference portion may be peeled off while remaining bonded to the film.

[0005] The portion peeled off from the wall due to adhesion to the film may enter the opening. The raw material entering the opening may adhere to the liquid supply part. In order for the liquid introduction part of the printing device to be connected to the liquid supply part so that the ink can flow, the liquid introduction part and the liquid supply part need to be in close contact. For example, when a linear raw material along the shape of the first mounting part adheres to the liquid supply part through the opening, a gap may be generated between the liquid introduction part and the liquid supply part. As a result, the ink inside the liquid storage body may leak from the gap generated between the liquid introduction part and the liquid supply part.

[0006] Patent Document 1: Japanese Patent Application Publication No. 2022-148023 Summary of the invention

[0007] According to a first aspect of the present disclosure, there is provided a box installed on a printing device having a liquid introduction portion. The box comprises: a liquid storage portion for storing liquid; a liquid supply portion capable of supplying the liquid stored in the liquid storage portion to the printing device by connecting to the liquid introduction portion; a storage portion that internally stores a portion of the liquid supply portion and comprises a wall portion, wherein the wall portion has an opening, a plurality of welding protrusions, and a plurality of hot-melt bonding portions, wherein the opening is for the liquid introduction portion to be inserted and is connected to the liquid supply portion, wherein the plurality of welding protrusions are a plurality of protrusions arranged along the outer edge of the opening at intervals, and wherein the plurality of hot-melt bonding portions are attached to the plurality of The plurality of welded protrusions are arranged on a portion of the surface of the plurality of welded protrusions and are arranged in a state of being separated from each other; a thin sheet, which covers the opening, the plurality of welded protrusions and the plurality of hot-melt-bonded portions and is bonded to the plurality of welded protrusions in a peelable manner, the plurality of welded protrusions are respectively the protrusions formed on the wall portion before the thin sheet is hot-melt-bonded and are the portions of the protrusions formed by the raw material that can be hot-melt-bonded that are not melted by hot-melt-bonding, and the plurality of hot-melt-bonded portions are respectively the portions of the protrusions formed by the hot-melt-bonding before the thin sheet is hot-melt-bonded and are melted, and a portion is connected to the thin sheet.

[0008] According to a second aspect of the present disclosure, a method for hot-melting a sheet is provided. The method for hot-melting a sheet comprises: in a state where a sheet formed of a raw material capable of hot-melting covers an opening formed on a wall portion of a storage portion and a mounting portion, the mounting portion and the sheet are hot-melted by a welding component, thereby forming a plurality of hot-melting protrusions and a plurality of hot-melting portions, wherein the storage portion internally stores a portion of a liquid supply portion that enables liquid stored in a liquid storage portion to flow out to a printing device, the mounting portion is a protrusion formed of a raw material capable of hot-melting, the plurality of hot-melting protrusions are portions of the mounting portion that are not melted by hot-melting, and are a plurality of protrusions arranged along the outer edge of the opening in a state where they are spaced apart from each other, and the plurality of hot-melting portions are portions of the mounting portion that are melted by hot-melting and attached to a portion of the surface of the plurality of hot-melting protrusions, and are arranged in a state where they are spaced apart from each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a perspective view showing the structure of a printing system as an embodiment of the present disclosure.

[0010] Figure 2 A diagram for explaining the box installation portion.

[0011] Figure 3 A diagram illustrating a state in which the cartridge is completely installed in the cartridge installation portion.

[0012] Figure 4 Observe in the -Z direction Figure 2 Figure 2-1 shows a diagram of a box mounting portion.

[0013] Figure 5 A three-dimensional diagram of the box.

[0014] Figure 6 A three-dimensional view of the box before heat-fusion bonding with the sheet.

[0015] Figure 7 This is a diagram showing a state in which a cartridge with the sheet peeled off is inserted into a cartridge mounting portion.

[0016] Figure 8 Observe along the +Z direction Figure 5 Figure of the box.

[0017] Fig. 9 for Figure 8 IX-IX sectional view.

[0018] Fig.10 Observe along the +Z direction Figure 5 A schematic diagram illustrating the storage bottom wall.

[0019] Fig.11 For the general Figure 6An enlarged view of a portion of the storage bottom wall of the box.

[0020] Fig.12 for Fig.10 XII-XII sectional view.

[0021] Fig.13 For the general Fig.10 An enlarged view of the periphery of section XII-XII.

[0022] Fig.14 A diagram for explaining the installation process of the cartridge to the cartridge installation portion.

[0023] Fig.15 A diagram illustrating a state in which the cartridge is completely installed in the cartridge installation portion.

[0024] Fig.16 Observe along the -Z direction Fig.15 .

[0025] Fig.17 It is a figure explaining the 1st welding member.

[0026] Fig.18 This is a flowchart for explaining an example of a method for thermally welding a sheet.

[0027] Fig.19 It is a figure for demonstrating the cartridge of 2nd Embodiment.

[0028] Fig. 20 This is a diagram for explaining a box in a state where a sheet 230 is heat-fused.

[0029] Fig.21 It is a figure explaining the 2nd welding member. DETAILED DESCRIPTION

[0030] A. First Implementation Method:

[0031] A1. Structure of the first embodiment:

[0032] Figure 1 1 is a perspective view showing the structure of a printing system 1 as an embodiment of the present disclosure. Figure 1In the figure, three mutually orthogonal spatial axes, namely the X-axis, the Y-axis and the Z-axis, are depicted. The directions pointed to by the arrow marks of the X-axis, the Y-axis and the Z-axis represent the positive directions along the X-axis, the Y-axis and the Z-axis, respectively. The positive directions along the X-axis, the Y-axis and the Z-axis are set as the +X direction, the +Y direction and the +Z direction, respectively. The directions opposite to the directions pointed to by the arrow marks of the X-axis, the Y-axis and the Z-axis are the negative directions along the X-axis, the Y-axis and the Z-axis, respectively. The negative directions along the X-axis, the Y-axis and the Z-axis are set as the -X direction, the -Y direction and the -Z direction, respectively. The directions along the X-axis, the Y-axis and the Z-axis that are not positive or negative are marked as the X direction, the Y direction and the Z direction, respectively. The same is true for the figures and descriptions shown later. The X-axis and the Y-axis are axes along the horizontal plane, and the Z-axis is an axis along the direction of gravity.

[0033] The printing system 1 uses ink to print on the printing medium PM. In this embodiment, the printing system 1 uses a plurality of inks to print. The printing system 1 includes a printing device 10 and four cartridges 20. The printing device 10 is an inkjet printer that ejects liquid ink to print on the printing medium PM. The cartridges 20 can be installed or removed from the printing device 10. Figure 1 As shown in FIG. 1 , the printing device 10 is used in a state of being arranged on a horizontal surface. The printing device 10 includes a storage box 11 , a cartridge mounting portion 12 , a carriage 13 , a discharge head 14 , a tube 15 , a drive mechanism 16 , and a control portion 17 .

[0034] The storage box 11 stores the box mounting portion 12, the slide 13, the ejection head 14, the drive mechanism 16, the control unit 17, and the box 20. The storage box 11 has a substantially rectangular shape. The storage box 11 includes a front surface cover 110 and a replacement cover 111. The front surface cover 110 is a portion for placing the printed print medium PM. The front surface cover 110 is disposed on the wall on the +Y direction side of the storage box 11. The front surface cover 110 is a plate-shaped component extending in the X direction and the Y direction. The replacement cover 111 is opened and closed when the user removes and installs the box 20 relative to the box mounting portion 12. The replacement cover 111 is a portion of the wall on the +Y direction side of the storage box 11.

[0035] Figure 2 FIG. 1 is a diagram for explaining the box mounting portion 12. Figure 2 In the figure, the box 20 and a part of the box mounting portion 12 are omitted. Figure 4 In the present embodiment, the box 20 is inserted or removed from the box installation portion 12 by the user along the Y direction. Specifically, the box 20 is inserted in the -Y direction by the user relative to the box installation portion 12. In addition, the box 20 is pulled out in the +Y direction by the user relative to the box installation portion 12.

[0036] The cartridge mounting portion 12 transmits the ink supplied from the cartridge 20 through Figure 1 The cartridge mounting portion 12 is located on the -Y direction side of the replacement cover 111 inside the storage box 11. Figure 2 As shown, the cartridge mounting portion 12 includes a mounting box 120, four liquid introduction portions 121, four support members 122, four liquid storage portions 123, four device-side supply portion positioning portions 124, four device-side terminal portions 125, and an engaging formation body 126. Figure 2 In the figure, reference symbols are given to the liquid introduction portion 121, the support member 122, the liquid storage portion 123, the device-side supply portion positioning portion 124, and the device-side terminal portion 125 which are located closest to the +X direction.

[0037] The installation box 120 forms a storage chamber 120a for storing the cartridge 20. The installation box 120 has a substantially rectangular parallelepiped box shape with an open surface on the +Y direction side. Figure 2 , for the sake of convenience, a diagram showing a portion of the opening on the +X direction side of the installation box 120 is shown. The installation box 120 is provided with four support members 122, four liquid storage portions 123, four device-side supply portion positioning portions 124, four device-side terminal portions 125, and an engaging formation body 126. The liquid introduction portion 121, support member 122, liquid storage portion 123, device-side supply portion positioning portion 124, device-side terminal portion 125, and engaging formation body 126 located closest to the +X direction are described below.

[0038] Figure 3 20 is a cross-sectional view for explaining the installation state of the cartridge 20 in the cartridge installation portion 12. Figure 3 The liquid introduction part 121 is described. The liquid introduction part 121 receives the ink supplied from the liquid supply part 218 of the cartridge 20. The liquid supply part 218 will be described later. The liquid introduction part 121 is a cylindrical member. The liquid introduction part 121 has a flow channel inside for the ink to flow. The liquid introduction part 121 is connected to the liquid storage part 123, and the ink flowing in the flow channel flows into the liquid storage part 123. Figure 2 As shown, the liquid introduction part 12 is provided on the −Y direction side with respect to the device-side supply part positioning part 124 .

[0039] The supporting member 122 forms the bottom of the storage chamber 120a. The supporting member 122 supports the box 20 stored in the storage chamber 120a toward the +Z direction. In the present embodiment, four supporting members 122 are arranged in the X direction. The supporting member 122 has a shape extending in the Y direction and recessed in the -Z direction. The supporting member 122 includes a supporting bottom wall 122a, a first supporting side wall 122b, and a second supporting side wall 122c. The supporting bottom wall 122a supports the box 20 in the Z direction. The supporting bottom wall 122a includes a supporting opening 122aa. The supporting opening 122aa is provided with a liquid introduction portion 121 on the inner side. The supporting opening 122aa is formed at the end of the supporting bottom wall 122a on the +Y direction side. The supporting opening 122aa penetrates in the Z direction. The supporting opening 122aa is formed from the first supporting side wall 122b to the second supporting side wall 122c in the X direction.

[0040] Figure 4 Observe in the -Z direction Figure 2 FIG. 12 shows a box mounting portion 12. In addition, Figure 4 In, omitted Figure 2 A portion of the box installation portion 12 shown. The first supporting side wall 122b supports the box 20 on the -X direction side. The first supporting side wall 122b extends from the supporting bottom wall 122a to the +Z direction at the end of the supporting bottom wall 122a on the -X direction side. The first supporting side wall 122b has a first installation guide portion 122ba. The first installation guide portion 122ba guides the box 20 in the insertion direction and the removal direction when the box 20 is installed by the user. Figure 4 As shown, the first installation guide portion 122ba is a convex portion protruding toward the second supporting side wall 122c. The first installation guide portion 122ba extends along the Y direction. In the present embodiment, the two first installation guide portions 122ba are arranged at intervals in the Y direction. The second supporting side wall 122c supports the box 20 on the +X direction side. The second supporting side wall 122c extends from the supporting bottom wall 122a to the +Z direction at the end portion on the +X direction side of the supporting bottom wall 122a. The second supporting side wall 122c is opposite to the first supporting side wall 122b in the X direction. The second supporting side wall 122c has a second installation guide portion 122ca. The second installation guide portion 122ca guides the box 20 in the insertion direction and the removal direction when the box 20 is installed by the user. As shown Figure 4 As shown, the second mounting guide portion 122ca is a convex portion protruding toward the first supporting side wall 122b. The second mounting guide portion 122ca extends along the Y direction. In the present embodiment, two second mounting guide portions 122ca are arranged at intervals in the Y direction.

[0041] Figure 2The liquid storage portion 123 shown stores the ink received from the cartridge 20 via the liquid introduction portion 121. Figure 1 The liquid storage portion 123 is located on the -Z direction side of the liquid introduction portion 121. The device-side supply portion positioning portion 124 is a portion that enters the supply portion positioning portion 223b of the box 20 during the installation process of the box 20 to the box mounting portion 12. In a state after the terminal connection process described later and before the supply portion connection process, the liquid introduction portion 121 is opposite to the opening 223a of the storage portion 220 in the Z direction. The supply portion positioning portion 223b, the storage portion 220, the opening 223a and the installation process will be described later. The device-side supply portion positioning portion 124 has a substantially rectangular shape.

[0042] The device-side terminal portion 125 is electrically connected to the circuit board 250 of the box 20 when the box 20 is mounted on the box mounting portion 12. The circuit board 250 will be described later. The device-side terminal portion 125 is electrically connected to the circuit board 250 of the box 20 through wiring (not shown). Figure 1 The circuit board 250 and the control unit 17 are electrically connected. As a result, data communication can be performed between the circuit board 250 and the control unit 17. The engaging member 126 engages with the box 20 when the box 20 is installed in the box installation unit 12, thereby maintaining the installation state of the box 20 in the box installation unit 12. The engaging member 126 is provided at the end of the box installation unit 12 on the +Y direction side. Figure 3 As shown, the engagement forming body 126 has an installation engagement portion 126a. The installation engagement portion 126a holds the installation state of the cartridge 20 by engaging with the cartridge engagement portion 222a of the cartridge 20. The cartridge engagement portion 222a will be described later.

[0043] Figure 1 The carriage 13 shown moves the ejection head 14 relative to the print medium PM. Specifically, the carriage 13 moves the ejection head 14 by reciprocating in the X direction. The ejection head 14 ejects ink to the print medium PM, thereby printing data such as text and images on the print medium PM. The tube 15 circulates the ink in the liquid storage portion 123 of the cartridge mounting portion 12, thereby supplying the ink to the ejection head 14.

[0044] The driving mechanism 16 reciprocates the carriage 13 in the X direction based on a control signal from the control unit 17. The driving mechanism 16 includes a timing belt 160 and a driving motor 161. The timing belt 160 transmits the power of the driving motor 161 to the carriage 13. The driving motor 161 rotates the timing belt 160. The control unit 17 controls each unit of the printing device 10 and sends or receives signals to or from the cartridge 20.

[0045] Figure 5 It is a three-dimensional view of the box 20. Figure 6 It is a perspective view of the case 20 before heat-fusion bonding with the sheet 230. The sheet 230 will be described later. Figure 7 This is a diagram showing a state in which the cartridge 20 from which the sheet 230 has been peeled off is inserted into the cartridge mounting portion 12 . Figure 5 as well as Figure 6 The X direction, Y direction, and Z direction are shown in Figure 7 The cartridge 20 shown in FIG. 1 is in a state where the cartridge 20 has been completely inserted into the cartridge installation portion 12. The cartridge 20 stores ink to be supplied to the printing device 10. The cartridge 20 is configured to be attachable to or detachable from the printing device 10. Figure 1 As shown in FIG. 1 , in this embodiment, four boxes 20 are installed on the printing device 10. The box 20 has a substantially rectangular shape. In the box 20, the X direction is the short side direction of the box 20, the Y direction is the long side direction, and the Z direction is the height direction. In the box 20, the size in the long side direction is the largest, and the size in the short side direction is the smallest. Figure 5 As shown, the box 20 includes a box body 200 and a circuit board 250 .

[0046] The box body 200 includes a liquid storage body 210, a storage part 220, and a sheet 230. The liquid storage body 210 stores ink as a liquid. The liquid storage body 210 has a substantially rectangular shape. The liquid storage body 210 includes a front wall 211, a rear wall 212, an upper wall 213, a bottom wall 214, a first side wall 215, a second side wall 216, a liquid storage part 217, and a liquid supply part 218. The front wall 211 forms a wall portion on the -Y direction side of the liquid storage body 210. The rear wall 212 forms a wall portion on the +Y direction side of the liquid storage body 210. The rear wall 212 is opposite to the front wall 211 in the Y direction. The upper wall 213 forms a wall portion on the +Z direction side of the liquid storage body 210. The bottom wall 214 forms a wall portion on the -Z direction side of the liquid storage body 210. The bottom wall 214 faces the upper wall 213 in the Z direction. The first side wall 215 forms a wall portion on the -X direction side of the liquid container 210. The second side wall 216 forms a wall portion on the +X direction side of the liquid container 210. The second side wall 216 faces the first side wall 215 in the X direction.

[0047] Figure 8 Observe along the +Z direction Figure 5 Figure 20 of the box. Fig. 9 for Figure 8 IX-IX sectional view. Figure 5 The liquid receiving portion 217 shown in the figure is a portion for receiving ink. The liquid receiving portion 217 is formed by injection molding using polypropylene as a material. The liquid supply portion 218 allows the ink in the liquid receiving portion 217 to flow in. Figure 3As shown, the liquid supply unit 218 is connected to the liquid introduction unit 121 of the cartridge mounting unit 12 when the cartridge 20 is mounted on the cartridge mounting unit 12. The liquid supply unit 218 is connected to the liquid introduction unit 121 through the liquid introduction unit 121. Figure 1 The ejection head 14 of the printing device 10 shown in the figure supplies the ink contained in the liquid containing section 217. In the present embodiment, the liquid supply section 218 is a cylindrical member. The liquid supply section 218 is provided with a liquid introduction section 121 inserted into the liquid supply section 218. Figure 6 The valve mechanism is a valve mechanism that opens the valve when the liquid introduction part 121 is inserted into the opening 223a of the storage part 220 shown in the figure, and closes the valve when the liquid introduction part 121 is not inserted into the opening 223a. Fig. 9 As shown in the figure, the liquid supply part 218 has a gasket 218a inside. Although not shown in the figure, when the liquid introduction part 121 is inserted, the gasket 218a seals the liquid introduction part 121 and the liquid supply part 218. Thus, it is possible to prevent the ink inside the liquid storage part 217 from leaking from between the liquid supply part 218 and the liquid introduction part 121.

[0048] Figure 6 The storage portion 220 shown accommodates a portion of the liquid supply portion 218 therein. The storage portion 220 is mounted on the liquid storage portion 217. The storage portion 220 has a substantially rectangular parallelepiped shape with an opening on the +Z direction side. The storage portion 220 is molded by injection molding using polypropylene as a material. The storage portion 220 includes a storage front wall 221, a storage rear wall 222, a storage bottom wall 223, a first storage side wall 224, and a second storage side wall 225. The storage front wall 221 forms a wall portion on the -Y direction side of the storage portion 220. The storage rear wall 222 forms a wall portion on the +Y direction side of the storage portion 220. The storage rear wall 222 is opposite to the storage front wall 221 in the Y direction. The storage rear wall 222 includes a box locking portion 222a. As shown in FIG. Figure 3 As shown, the cartridge engaging portion 222a enters through the mounting engaging portion 126a of the cartridge mounting portion 12 and engages with the mounting engaging portion 126a when the cartridge 20 is mounted in the cartridge mounting portion 12. The mounting state of the cartridge 20 relative to the cartridge mounting portion 12 is maintained by this engagement. Figure 6 As shown, the box engagement portion 222a is a recessed portion recessed in the -Y direction from the outer surface of the storage rear wall 222. The box engagement portion 222a is formed near the end portion of the storage rear wall 222 intersecting with the storage bottom wall 223.

[0049] Fig.10 Observe along the +Z direction Figure 5 The schematic diagram of the storage bottom wall 223 is provided for explanation. Fig.10 , the sheet 230 is shown in perspective. Figure 5 As shown, the storage bottom wall 223 forms the wall portion on the -Z direction side of the storage portion 220. Figure 5 as well as Fig.10 As shown, the storage bottom wall 223 has an opening 223a, a supply unit positioning portion 223b, a first welding protrusion 223c, 14 first heat welding portions 223d, a second welding protrusion 223e, 9 second heat welding portions 223f, a third welding protrusion 223g, and a third heat welding portion 223h. Fig.10 In FIG. 1 , hatching is applied to the first welding protrusion 223c, the second welding protrusion 223e, and the third welding protrusion 223g. Fig.10 , the first heat-bonded portion 223d, the second heat-bonded portion 223f, and the third heat-bonded portion 223h are shown in perspective, and the first heat-bonded portion 223d located on the XII-XII section described later is hatched. Fig.10 The shapes of the first welding protrusion 223c, the second welding protrusion 223e, the third welding protrusion 223g, the first heat welding part 223d, the second heat welding part 223f and the third heat welding part 223h are not accurate.

[0050] like Figure 3 As shown, the liquid introduction part 121 is inserted into the opening 223a. The opening 223a is connected to the liquid supply part 218. The opening 223a passes through the central axis CA of the liquid supply part 218 when viewed in the Z direction. In the present embodiment, the opening 223a has a substantially circular shape when viewed in the Z direction. The supply part positioning part 223b is a part that receives the device-side supply part positioning part 124 of the box mounting part 12 when the box 20 is mounted on the box mounting part 12. The supply part positioning part 223b implements positioning of the liquid supply part 218 relative to the liquid introduction part 121. The positioning will be described later. The supply part positioning part 223b is located on the +Y direction side relative to the opening 223a. As Figure 6 As shown, the supply portion positioning portion 223 b is a recessed portion recessed toward the +Z direction on the outer surface of the bottom wall 214 .

[0051] Fig.11 For the general Figure 6 FIG. 2 is an enlarged view of a portion of the storage bottom wall 223 of the box 20. Before describing the first welding protrusion 223c, the box 20 before being heat-welded with the sheet 230 will be described. Fig.11 As shown, before being heat-fused with the sheet 230, the box 20 has a first mounting portion 30, a second mounting portion 31, and a third mounting portion 32. The first mounting portion 30, the second mounting portion 31, and the third mounting portion 32 are convex portions formed on the storage bottom wall 223 of the box 20 before being heat-fused with the sheet 230. Fig.11As shown, the first mounting portion 30, the second mounting portion 31 and the third mounting portion 32 protrude from the storage bottom wall 223 in the -Z direction. The first mounting portion 30, the second mounting portion 31 and the third mounting portion 32 are formed of raw materials that can be heat-welded. In the present embodiment, the first mounting portion 30, the second mounting portion 31 and the third mounting portion 32 are formed of polypropylene. The first mounting portion 30 is a continuous convex portion surrounding the opening 223a. The first mounting portion 30 has a hexagonal shape when viewed along the Z direction. The second mounting portion 31 is a continuous convex portion arranged along the edge of the supply portion positioning portion 223b except the edge on the opening 223a side. The third mounting portion 32 is connected to the end of the first mounting portion 30 on the -Y direction side. The third mounting portion 32 has a rectangular shape when viewed along the Z direction.

[0052] Fig.10 The first welding protrusion 223c shown is a continuous protrusion surrounding the opening 223a. The first welding protrusion 223c overlaps with the sheet 230 when viewed in the +Z direction. The first welding protrusion 223c protrudes from the storage bottom wall 223. The first welding protrusion 223c has a hexagonal shape when viewed in the Z direction. The first welding protrusion 223c has 14 first welding protrusions 223ca and 14 first connecting parts 223cb.

[0053] The first welded protrusion 223ca is Fig.11 The portion of the first mounting portion 30 that has not been melted by heat welding is shown. Fig.10 As shown, 14 first welding protrusions 223ca are arranged along the outer edge of the opening 223a in a state where they are spaced apart from each other. Six of the 14 first welding protrusions 223ca are respectively arranged at the vertices of the first welding protrusion 223c that is hexagonal when viewed along the Z direction. In addition, "arranged at the vertex" in this specification means arranged at a position including the vertex. The eight first welding protrusions 223ca that are not arranged at the vertices are respectively arranged on the sides of the first welding protrusion 223c. In addition, Fig.10 The shape of the first welding protrusion 223ca in the figure is not accurate. The 14 first welding protrusions 223c correspond to the shapes of the melted parts of the first mounting part 30. The shapes of the first welding protrusion 223c formed by melting the part of the first mounting part 30 including the vertices of the hexagon when viewed in the Z direction and the first welding protrusion 223c formed by melting the side part of the first mounting part 30 are different.

[0054] The first connection part 223cb connects the adjacent first welding protrusions 223ca to each other. Thus, the plurality of first welding protrusions 223ca and the first connection part 223cb constitute a continuous protrusion surrounding the opening 223a, namely, the first welding protrusion 223c. In the present embodiment, the 14 first connection parts 223cb are respectively connected to the thin sheet 230 continuously between the adjacent first welding protrusions 223ca. In detail, the 14 first connection parts 223cb are respectively connected to the thin sheet 230 continuously on the outer surface on the -Z direction side from the end connected to the first welding protrusion 223ca to the end connected to the opposite first welding protrusion 223ca. In other words, it is configured in a manner that no gap is generated between the first connection part 223cb and the thin sheet 230 when viewed along the X direction. In the present embodiment, the first connection part 223cb is arranged on the edge of the first welding protrusion 223c.

[0055] Fig.12 for Fig.10 Sectional view XII-XII of the Fig.12 In the middle, painted with Fig.10 The hatching lines correspond to the first weld protrusion 223ca and the first heat weld portion 223d. Fig.12 The sizes and shapes of the various parts are not accurate. Fig.12 The first heat-welding portion 223d shown is Fig.11 The first mounting portion 30 is formed by melting due to heat welding. A portion of the first welding protrusion 223ca is in contact with the sheet 230. In detail, Fig.12 As shown, the surface of the first heat-bonded portion 223d on the -Z direction side is bonded to the sheet 230. The fourteen first heat-bonded portions 223d are attached to a part of the surface of the fourteen first welded protrusions 223ca, respectively.

[0056] like Fig.12 As shown, the first heat-welding portion 223d is formed from the end of the first welding protrusion 223ca on the -Z direction side to a portion of the step difference portion SD toward the portion of the storage bottom wall 223 where the first welding protrusion 223c is not formed. The portion of the first heat-welding portion 223d formed on the step difference portion SD is a portion where the portion of the first mounting portion 30 melted by heat welding flows into the step difference portion SD and solidifies at the step difference portion SD. Fig.12 The same is true for the other first heat-fused portions 223d not shown in the figure. In addition, the 14 first heat-fused portions 223d correspond to the shapes of the melted portions of the first mounting portion 30. The first heat-fused portions 223d formed by melting the portions of the first mounting portion 30 including the vertices of the hexagon when viewed along the Z direction and the first heat-fused portions 223d formed by melting the portions of the sides of the first mounting portion 30 may have different shapes. Fig.10 as well as Fig.12 As shown, the first heat-welding portion 223d of the present embodiment covers the outer surface of the -Z direction side of the first welding protrusion 223ca. When viewed along the +Z direction, the 14 first heat-welding portions 223d overlap in a manner that each includes one of the 14 first welding protrusions 223ca. The 14 first heat-welding portions 223d are arranged in a spaced-apart state. The 14 first heat-welding portions 223d are arranged along the outer edge of the opening 223a.

[0057] Fig.13 For the general Fig.10 In this embodiment, as shown in FIG. Fig.13 As shown, Fig.10 The first heat-welding portion 223d located on the hexagonal side of the first welding protrusion 223c when viewed in the Z direction has an elliptical shape when viewed in the +Z direction. The first heat-welding portion 223d located on the hexagonal side is described below. The first heat-welding portion 223d has an overlapping portion 223da and a non-overlapping portion 223db. Fig.13 In FIG. 2 , the non-overlapping portion 223db is hatched. The overlapping portion 223da is a portion that overlaps with the first welded convex portion 223ca when viewed in the +Z direction. The non-overlapping portion 223db is a portion that does not overlap with the first welded convex portion 223ca when viewed in the +Z direction. Fig.13 As shown, among the intersections between the line dividing the overlapping portion 223da and the non-overlapping portion 223db on the outer periphery of the first heat-welded portion 223d, the intersection located closest to the front when viewed along the -Y direction is marked as the first intersection FI. Fig.13 There are two intersections located at the nearest front position as shown, and the intersection located on the +X direction side is described below. Depending on the shape of the first heat-welded portion 223d, there may be one intersection. In this embodiment, it is configured so that the angle formed by the straight line D1 perpendicular to the -Y direction and the Z direction when viewed in the Z direction and the tangent line T passing through the end Ed when approaching the first intersection FI along the outer contour of the outer periphery of the non-overlapping portion 223db is 30°.

[0058] Fig.10 The second welding protrusion 223e shown is a continuous protrusion arranged along the edge of the supply unit positioning portion 223b except the edge on the opening 223a side. The second welding protrusion 223e overlaps with the sheet 230 when viewed in the +Z direction. The second welding protrusion 223e protrudes from the storage bottom wall 223. The second welding protrusion 223e includes 9 second welding protrusions 223ea and 8 second connecting portions 223eb.

[0059] The second welded protrusion 223ea is Fig.11 The portion of the second mounting portion 31 that has not been melted by heat welding is shown. Fig.10 As shown, the nine second welding protrusions 223ea are arranged along the outer edge of the supply unit positioning portion 223b at intervals. Two of the nine second welding protrusions 223ea are respectively arranged at positions including the corners of the second welding protrusion 223e. The second welding protrusions 223ea not arranged at positions including the corners are respectively arranged on the sides. In addition, Fig.10 The shape of the second welded protrusion 223ea is not accurate. Like the first welded protrusion 223ca, the nine second welded protrusions 223ea correspond to the shapes of the melted portions of the second mounting portion 31.

[0060] The second connection portion 223eb connects the adjacent second welding protrusions 223ea to each other. Thus, the plurality of second welding protrusions 223ea and the second connection portion 223eb constitute a continuous protrusion along the supply portion positioning portion 223b. In the present embodiment, the eight second connection portions 223eb are respectively connected to the sheet 230 continuously between the adjacent second welding protrusions 223ea. In detail, the eight second connection portions 223eb are respectively connected to the sheet 230 continuously on the outer surface on the -Z direction side from the end connected to the second welding protrusion 223ea to the end connected to the opposite second welding protrusion 223ea. In other words, it is configured in such a way that no gap is generated between the second connection portion 223eb and the sheet 230 when viewed along the X direction.

[0061] The second heat-fusion portion 223f is: Fig.11 The other part of the second mounting portion 31 is melted by heat welding. Fig.10The second heat-welding portion 223f and a portion of the second welding protrusion 223ea shown are in contact with the sheet 230. In detail, similarly to the first heat-welding portion 223d, the surface of the second heat-welding portion 223f on the -Z direction side is bonded to the sheet 230. The nine second heat-welding portions 223f are attached to a portion of the surface of the nine second welding protrusions 223ea, similarly to the first heat-welding portion 223d. That is, the second heat-welding portion 223f is formed from the end of the second welding protrusion 223ea on the -Z direction side to a portion of the step difference portion toward the portion of the storage bottom wall 223 where the second welding protrusion 223e is not formed. The portion of the second heat-welding portion 223f formed on the step difference portion is a portion where the portion of the second welding protrusion 223e melted by heat-welding flows into the step difference portion and solidifies at the step difference portion. The nine second heat-welded portions 223f correspond to the shapes of the melted portions of the second mounting portion 31. The second heat-welded portions 223f formed by melting the corners of the second mounting portion 31 and the second heat-welded portions 223f formed by melting the sides of the second mounting portion 31 may have different shapes.

[0062] like Fig.10 As shown, the second heat-welding portion 223f of this embodiment covers the outer surface of the -Z direction side of the second welding protrusion 223ea. When viewed along the +Z direction, the nine second heat-welding portions 223f overlap in a manner that each includes one of the nine second welding protrusions 223ea. The nine second heat-welding portions 223f are arranged in a spaced-apart state. The second heat-welding portions 223f are arranged along the outer edges of the supply portion positioning portion 223b.

[0063] The third welding protrusion 223g is a protrusion connected to the end of the first welding protrusion 223c on the -Y direction side and protruding from the first welding protrusion 223c in the -Y direction. The third welding protrusion 223g includes a third connecting portion 223ga and a third welding protrusion 223gb. The third connecting portion 223ga is a portion connected to the first welding protrusion 223c. The third welding protrusion 223gb is a portion of the third mounting portion 32 that is not melted by heat welding.

[0064] The third heat-fusion portion 223h is: Fig.11 The third mounting portion 32 is formed by melting due to heat welding. Fig.10 As shown, the third heat-bonded portion 223h is attached to the surface of the third welded protrusion 223gb.

[0065] Figure 6The first storage side wall 224 shown forms a wall portion on the -X direction side of the storage section 220. The first storage side wall 224 intersects with the storage bottom wall 223 and extends in the Y direction which is the long side direction of the storage section 220. The first storage side wall 224 extends from the storage bottom wall 223 toward the liquid storage body 210. The first storage side wall 224 has a first box guide portion 224a. When the box 20 is inserted into the box mounting portion 12, the first box guide portion 224a contacts the first mounting guide portion 122ba of the box mounting portion 12 and is guided in the -Y direction by the first mounting guide portion 122ba. The first box guide portion 224a extends along the Y direction at the end portion of the first storage side wall 224 on the -Z direction side. The second storage side wall 225 is opposite to the first storage side wall 224 in the X direction which is the short side direction of the storage section 220. The second storage side wall 225 intersects the storage bottom wall 223 and extends in the Y direction, which is the long side direction of the storage portion 220. The second storage side wall 225 includes a second box guide 225a. When the box 20 is inserted into the box mounting portion 12, the second box guide 225a contacts the second mounting guide 122ca of the box mounting portion 12, and is guided in the -Y direction by the second mounting guide 122ca. The second box guide 225a extends in the Y direction at the end of the second storage side wall 225 on the -Z direction side.

[0066] Figure 5 The sheet 230 shown can prevent foreign matter from entering from the outside of the box 20 by covering the opening 223a. More specifically, the sheet 230 can prevent foreign matter from adhering to the pad 218a of the liquid supply part 218 connected to the opening 223a by covering the opening 223a. The sheet 230 can be peeled off from the storage bottom wall 223 while covering the opening 223a, the first welding protrusion 223c, the supply part positioning part 223b, the second welding protrusion 223e, the third welding protrusion 223g, the first heat welding part 223d, the second heat welding part 223f, and the third heat welding part 223h. The sheet 230 is bonded to the first heat-bonded portion 223ca, the second heat-bonded portion 223ea and the third heat-bonded portion 223gb via the first heat-bonded portion 223d, the second heat-bonded portion 223f and the third heat-bonded portion 223h in a removable manner. The sheet 230 overlaps the first heat-bonded portion 223d, the second heat-bonded portion 223f and the third heat-bonded portion 223h in the Z direction. Before the user mounts the box 20 on the box mounting portion 12, the sheet 230 is peeled off from the storage bottom wall 223 in the -Y direction. The -Y direction is the direction in which the sheet 230 is peeled off.

[0067] In this embodiment, if Figure 8As shown, when the box 20 is observed along the +Z direction, the thin sheet 230 is arranged in a manner overlapping with a portion of the first box guide 224a and the second box guide 225a and extending from the first box guide 224a and the second box guide 225a. In detail, the thin sheet 230 is arranged in a manner that the first thin sheet side portion 231 described later overlaps with the first box guide 224a and is located on the -X direction side compared to the first box guide 224a. In addition, the thin sheet 230 is arranged in a manner that the second thin sheet side portion 232 described later overlaps with the second box guide 225a and is located on the +X direction side compared to the second box guide 225a. In the present embodiment, the dimension of the thin sheet 230 in the X direction is larger than the spacing in the X direction between the first box guide 224a and the second box guide 225a.

[0068] In this embodiment, a fold is formed in a portion of the sheet 230 along the X direction, which is the width direction. The fold is formed by sealing the box 20 in a decompressed bag when the box 20 is shipped. The sheet 230 has a rectangular shape when the fold is not formed. The sheet 230 includes a first sheet side portion 231, a second sheet side portion 232, a first sheet end portion 233, a second sheet end portion 234, Fig. 9 The liquid absorbing member 235 is shown. Figure 8 As shown, the first sheet side portion 231 forms one end of the X direction, which is the short side direction of the box 20. The second sheet side portion 232 forms the other end of the X direction. The first sheet end portion 233 forms one end of the Y direction, which is the long side direction of the box 20. The first sheet end portion 233 is located at the end of the sheet 230 on the +Y direction side of the box 20. When viewed in the +Z direction, the first sheet end portion 233 is opposite to the first sheet end portion 233. Figure 5 The box engaging portion 222a shown in the figure is partially covered and extends outward from the storage rear wall 222. Figure 5 As shown, the length L1 of the portion of the sheet 230 extending outward from the storage rear wall 222 is longer than Figure 6 The length L2 from the storage bottom wall 223 to the box engaging portion 222a is shown. Figure 8 The second sheet end portion 234 shown forms an end portion of the sheet 230 on the −Y direction side of the cassette 20 .

[0069] The sheet 230 is formed of a material that can be heat-welded. In this embodiment, the sheet 230 is formed of polyethylene terephthalate. Fig.12Although not shown, the portion of the sheet 230 that is in contact with the first heat-welding portion 223d, the second heat-welding portion 223f, and the third heat-welding portion 223h is deformed from the shape before heat-welding due to melting. The deformed portion is welded to the first heat-welding portion 223d, the second heat-welding portion 223f, and the third heat-welding portion 223h.

[0070] Fig. 9 The liquid absorber 235 shown is a component for absorbing liquid. The liquid absorber 235 can absorb the ink stored in the cartridge 20. In this embodiment, the liquid absorber 235 is disposed on the surface of the sheet 230 on the +Z direction side. Fig. 9 As shown, the liquid absorber 235 is arranged on the surface of the sheet 230 on the +Z direction side, which is opposite to the top end of the liquid supply unit 218. In the present embodiment, the liquid absorber 235 is circular. The liquid absorber 235 is a component for holding liquid by a predetermined capillary force. The liquid absorber 235 may be, for example, a foaming component such as polyurethane foam, a porous body formed of polyvinyl alcohol, or a component formed of non-woven fabric. Since the sheet 230 has the liquid absorber 235, even if the box 20 falls or collides with other objects and is impacted, so that the ink leaks from the liquid supply unit 218, the leaked ink can be absorbed by the liquid absorber 235. It is possible to suppress the ink from scattering to the outside when the sheet 230 is peeled off from the storage bottom wall 223.

[0071] Figure 8 The circuit substrate 250 shown is configured with Figure 2 The circuit board 250 is provided on the box side terminal 251 which contacts the device side terminal portion 125 of the box mounting portion 12 shown in FIG. Figure 5 The corner portion is a portion where the storage front wall 221 and the storage bottom wall 223 intersect. The corner portion is a concave portion that is recessed toward the inside of the storage portion 220.

[0072] A2. Description of the installation process and installation status of Box 20:

[0073] Fig.14 A diagram for explaining the mounting process which is the process of mounting the cartridge 20 to the cartridge mounting portion 12 . Fig.15 This is a diagram for explaining a state in which the cartridge 20 is completely installed in the cartridge installation portion 12 . Fig.16 Observe along the -Z direction Fig.15 The above Figure 3 for Fig.16First, the installation process and installation state after the sheet 230 is peeled off from the storage bottom wall 223 are described. The installation process consists of a terminal connection process and a supply unit connection process. The terminal connection process is that the user connects the box 20 from Fig.14 The status shown becomes Figure 7 The state shown is moved in the -Y direction, and inserted into Figure 2 The supply section connection process is a process of connecting the liquid introduction section 121 of the cartridge installation section 12 to the liquid supply section 218 of the cartridge 20 while the device side terminal section 125 and the cartridge side terminal 251 are electrically connected. Specifically, in the supply section connection process, the liquid introduction section 121 of the cartridge installation section 12 is connected to the liquid supply section 218 of the cartridge 20 while the device side terminal section 125 and the cartridge side terminal 251 are electrically connected. Figure 7 From the state of Figure 3 The user rotates the storage rear wall 222 of the cartridge 20 in the direction indicated by the arrow mark A, with the rotation fulcrum RF of the cartridge mounting portion 12 shown as the center, so that the liquid introduction portion 121 is connected to the liquid supply portion 218. Fig.15 As shown, the installation of the box 20 to the box installation portion 12 is completed. Figure 3 In the mounted state shown, the mounted state is maintained by the engagement of the cartridge engaging portion 222 a of the cartridge 20 with the mounting engaging portion 126 a formed on the engagement forming body 126 of the cartridge mounting portion 12 .

[0074] A3. Preventing the forgetting to peel off the sheet 230:

[0075] As described above, the box 20 is smoothly installed on the box installation portion 12 in a state where the sheet 230 is peeled off from the storage bottom wall 223. Hereinafter, the installation process is performed in a state where the sheet 230 is welded to the storage bottom wall 223, i.e., in a welded state. As described above, Figure 8 The first sheet side portion 231 of the sheet 230 is arranged so as to overlap with the first box guide portion 224a and be located closer to the -X direction side than the first box guide portion 224a. In addition, the second sheet side portion 232 of the sheet 230 is arranged so as to overlap with the second box guide portion 225a and be located closer to the +X direction side than the second box guide portion 225a. In this embodiment, in the welding state, when the welding is performed from Fig.14 The state shown changes to Figure 7During the terminal connection process in the state shown, the sheet 230 is configured to be interposed between the first installation guide 122ba and the first box guide 224a and between the second installation guide 122ca and the second box guide 225a. Thus, in the welded state, when the terminal connection process is implemented, the box 20 does not move smoothly in the -Y direction. Therefore, in the stage before the sheet 230 collides with the liquid introduction part 121, that is, during the terminal connection process, the user can notice that the sheet 230 is forgotten to be peeled off. Thus, it is possible to prevent the sheet 230 from colliding with the liquid introduction part 121 and causing the ink to adhere to the outer surface of the sheet 230.

[0076] When the welding process is carried out Figure 7 The state shown changes to Fig.15 In the case of the supply unit connection process in the state shown, before the liquid introduction portion 121 of the box installation portion 12 and the liquid supply portion 218 of the box 20 are connected, the sheet 230 is configured in a manner interposed between the device-side supply unit positioning portion 124 and the supply unit positioning portion 223b. In this embodiment, the second welding protrusion 223ea is arranged along the outer edge of the supply unit positioning portion 223b. In other words, the outer edge of the supply unit positioning portion 223b is welded to the sheet 230 by heat welding. When the user moves the box 20 to Figure 7 When the cartridge 20 is rotated and moved in the direction of arrow mark A, the device-side supply unit positioning unit 124 collides with the sheet 230. Therefore, the cartridge 20 does not smoothly move in the direction of arrow mark A, and the user can notice that the sheet 230 has been forgotten to be peeled off. Thus, it is possible to prevent the sheet 230 from colliding with the liquid introduction unit 121 and causing the liquid to adhere to the sheet 230.

[0077] In addition, as mentioned above, Figure 8 The first sheet end 233 of the sheet 230 extends outward from the storage rear wall 222 to the extent that the first sheet end 233 covers a portion of the box engaging portion 222a. Figure 8 As shown, in the Y direction which is the long side direction of the box 20, the first sheet end portion 233 is located closer to the +Y direction than the storage rear wall 222. Figure 7 The state shown changes to Fig.15 In the case of the supply unit connection process in the state shown in the figure, in the stage before the installation is completed, the sheet 230 is between Figure 3The installation engaging portion 126a of the cartridge installation portion 12 shown in the figure and the cartridge engaging portion 222a of the cartridge 20 are configured in the manner shown in the figure. As a result, the cartridge 20 does not smoothly rotate and move in the direction of the arrow mark A due to the collision between the installation engaging portion 126a and the thin sheet 230, and the user can notice that the thin sheet 230 is forgotten to be peeled off before the installation of the cartridge 20 relative to the cartridge installation portion 12 is completed. Therefore, it is possible to suppress the user from forgetting to peel off the thin sheet 230. As a result, the connection between the liquid supply portion 218 and the liquid introduction portion 121 is normally implemented.

[0078] According to the box 20 of the present embodiment, a plurality of first heat-bonded portions 223d are attached to a portion of the surface of the first welding protrusion 223ca in a state where they are spaced apart from each other. Therefore, when the user peels off the sheet 230 from the storage bottom wall 223, the shape of the first heat-bonded portion 223d attached to the sheet 230 and peeled off becomes smaller than in a case where the first heat-bonded portion 223d is continuous. Therefore, even in a case where a portion of the first heat-bonded portion 223d peeled off from the storage bottom wall 223 enters the opening 223a, the possibility of a gap being generated between the liquid introduction portion 121 and the liquid supply portion 218 of the printing device 10 can be reduced compared to a case where a plurality of first heat-bonded portions 223d are continuous with each other. Moreover, by covering the opening 223a with the sheet 230, it is possible to prevent foreign matter from entering the opening 223a.

[0079] Furthermore, the first welding protrusions 223ca overlapped by the first heat welding parts 223d are connected by a plurality of first connecting parts 223cb, so that when ink leaks from the opening 223a, the first connecting parts 223cb can block it. In addition, since the first welding protrusions 223ca located at adjacent vertices of the first welding protrusion 223c are welded to each other, and the first connecting parts 223cb between the adjacent first welding protrusions 223ca are continuously connected to the sheet 230, the first connecting parts 223cb located between the vertices can be closely attached to the sheet 230. Thus, foreign matter can be prevented from entering between the first connecting parts 223cb and the sheet 230.

[0080] Fig.13The non-overlapping portion 223db shown may be bonded to the sheet 230 and peeled off from the storage bottom wall 223 when the sheet 230 is peeled off. According to the box 20 of this embodiment, the portion where the non-overlapping portion 223db is located in the angle range formed by the straight line parallel to the peeling direction and the straight line D1 perpendicular to the peeling direction passing through the points that divide the overlapping portion 223da and the non-overlapping portion 223db is less than 90°. That is, when the sheet 230 overlaps with the first heat-welding portion 223d, i.e., the Z direction, there is a portion where the first heat-welding portion 223d is not present in the angle range formed by the straight line parallel to the -Y direction as the peeling direction and the straight line D1 perpendicular to the peeling direction. When a force to peel off the sheet 230 is applied at the boundary between the portion and the non-overlapping portion 223db, the possibility of the sheet 230 being peeled off while being bonded to the non-overlapping portion 223db is lowered compared to the embodiment where the portion where the non-overlapping portion 223db is greater than 90°. Thus, when the user peels off the sheet 230 in the peeling direction, the easily peelable portion of the thermal fusion portion can be easily separated from the sheet 230 .

[0081] A4. Thermal fusion method of sheet 230:

[0082] Fig.17 2 is a diagram for explaining the first welding member 50. The first welding member 50 is formed by placing the sheet 230 relative to the Fig.11 A component used when the first mounting portion 30, the second mounting portion 31 and the third mounting portion 32 are thermally welded. Fig.17 In order to explain the posture of the first welding member 50 during heat welding, the X direction, the Y direction, and the Z direction are shown. Fig.17 The X direction, Y direction, Z direction and Fig.11 Heat welding is performed while the X, Y, and Z directions are aligned. Fig.17 As shown, the first welding member 50 has a substantially rectangular parallelepiped shape. The first welding member 50 is configured to generate heat in such a manner that the surface temperature reaches 280°C. In this embodiment, the first welding member 50 is a heater. The first welding member 50 has a first bottom surface 510. The first bottom surface 510 is in contact with the first bottom surface during heat welding. Fig.11 The first bottom surface 510 is a surface facing the storage bottom wall 223 as a wall portion of the storage portion 220. The first bottom surface 510 includes 14 first heating protrusions 520, 9 second heating protrusions 530, and a third heating protrusion 540.

[0083] The first heating protrusion 520 is Fig.11 The first mounting portion 30 and the sheet 230 are heat-welded. Fig.11 middle. Fig.17The first heating protrusion 520 shown is a protrusion formed on the first bottom surface 510. The first heating protrusion 520 is formed on the first bottom surface 510 in a state where the first heating protrusion 520 is spaced apart from each other. In the present embodiment, the 14 first heating protrusions 520 are configured in a manner such that the outline has a substantially hexagonal shape when the adjacent first heating protrusions 520 are connected to each other by a line. Six of the 14 first heating protrusions 520 are configured in a manner such that they are located at the vertices of the substantially hexagon. The second heating protrusion 530 heat-welds the second mounting portion 31 and the thin sheet 230. The second heating protrusion 530 is a protrusion formed on the first bottom surface 510. The second heating protrusion 530 is formed on the first bottom surface 510 in a state where the first heating protrusion 540 is spaced apart from each other. The third heating protrusion 540 heat-welds the third mounting portion 32 and the thin sheet 230. The third heating protrusion 540 is a protrusion formed on the first bottom surface 510. The third heating protrusion 540 is formed on the -Y direction side relative to the first heating protrusion 520. The third heating protrusion 540 is formed to be spaced apart from the first heating protrusion 520 .

[0084] Fig.18 This is a flowchart for explaining an example of a method for heat-welding the sheet 230. Heat-welding can be performed by an operator or by a robot that has pre-stored steps. Figure 6 The box 20 shown before the sheet 230 is heat-fused is fixed to the jig in a state where the opening 223a, the first mounting portion 30, the supply portion positioning portion 223b, the second mounting portion 31, and the third mounting portion 32 are covered by the sheet 230. Fig.18 In step S10, the temperature of the first welding member 50 is set to a set value. In this embodiment, the temperature of the first welding member 50 is raised to 280°C. In step S20, Fig.17 The X-axis, Y-axis, and Z-axis of Figure 6 The X-axis, Y-axis, and Z-axis of the first welding member 50 are aligned. Furthermore, when viewed in the Z direction, the first welding member 50 is arranged so that six of the 14 first heating protrusions 520 located at the vertices of the substantially hexagonal shape overlap with the vertices of the hexagon of the first mounting portion 30. At this time, when viewed in the Z direction, the first welding member 50 is arranged so that the third heating protrusion 540 overlaps with the end of the third mounting portion 32 on the -Y direction side.

[0085] exist Fig.18In step S30, the first welding component 50 moves in the direction in which the sheet 230 and the first mounting portion 30 are thermally welded, that is, in the welding direction. The welding direction is the +Z direction. Then, in a state where the first heating protrusion 520, the second heating protrusion 530 and the third heating protrusion 540 are in contact with the sheet 230, the first mounting portion 30, the second mounting portion 31 and the third mounting portion 32 are thermally welded to the sheet 230 by the first welding component 50. In addition, the portion of the first bottom surface 510 where the first heating protrusion 520, the second heating protrusion 530 and the third heating protrusion 540 are not formed is welded in a manner that is not in contact with the sheet 230. In step S30, the first mounting portion 30, the second mounting portion 31, the third mounting portion 32 and a portion of the sheet 230 are melted by thermal welding. In the present embodiment, when viewed along the Z direction, the portion of the first mounting portion 30 that overlaps with the first heating protrusion 520, the portion of the second mounting portion 31 that overlaps with the second heating protrusion 530, and the portion of the third mounting portion 32 that overlaps with the third heating protrusion 540 are melted. In the present embodiment, when viewed along the Z direction, a portion of the thin film 230 that overlaps with the first mounting portion 30, the second mounting portion 31, and the third mounting portion 32 is also melted. In addition, in step S30, the temperature of the first welding component 50 and the welding time are set in such a manner that the overlapping portions of the first mounting portion 30, the second mounting portion 31, and the third mounting portion 32 are not completely melted. In addition, the temperature of the first welding component 50 and the welding time are set in such a manner that the portions of the thin film 230 that overlap with the first mounting portion 30, the second mounting portion 31, and the third mounting portion 32 are not completely melted. Fig.18 In step S40, after a predetermined time has passed, the first welding member 50 is separated from the sheet 230. Then, the process ends.

[0086] The first mounting portion 30 and the melted portion of the sheet 230 are welded to each other to form the first welding protrusion 223c and the first heat welding portion 223d. Fig.10As shown, 14 first welding protrusions 223ca, 14 first connecting parts 223cb, and 14 first heat-welding parts 223d are formed. As described above, the first welding protrusion 223ca is a portion of the first mounting part 30 that is not melted by heat welding. The 14 first welding protrusions 223ca are arranged along the outer edge of the opening 223a in a state where they are spaced apart. As described above, the first welding protrusion 223c has a hexagonal shape when viewed along the +Z direction, and the first mounting part 30 and the sheet 230 are heat-welded by the first heating protrusion 520 in a manner that the 6 first welding protrusions 223ca are respectively arranged on each vertex of the hexagon. The first heat-welding part 223d is a portion of the first mounting part 30 that is melted by heat welding. The first heat-welding part 223d is attached to a portion of the surface of the first welding protrusion 223ca. The first heat-welding portions 223d are arranged at intervals. In the present embodiment, as described above, the first connecting portion 223cb connects the adjacent first welding protrusions 223ca to each other. The first connecting portion 223cb is connected to the first welding protrusion 223ca to form a continuous protrusion 223c that surrounds the opening 223a.

[0087] Furthermore, in this embodiment, if Fig.13 As shown, the first heat-bonded portion 223d located on the side of the hexagon among the 14 first heat-bonded portions 223d has an overlapping portion 223da overlapping with the first welded convex portion 223ca when viewed in the +Z direction and a non-overlapping portion 223db not overlapping with the first welded convex portion 223ca. In addition, the first heat-bonded portion 223d is formed in such a way that the angle formed by the straight line D1 perpendicular to the peeling direction passing through the first intersection FI between the lines dividing the overlapping portion 223da and the non-overlapping portion 223db on the outer periphery of the first heat-bonded portion 223d and the tangent line T passing through the end Ed when approaching the first intersection FI along the outer contour of the outer periphery of the non-overlapping portion 223db is 30°.

[0088] The second mounting portion 31 and the melted portion of the sheet 230 are welded to each other, so that Fig.10As shown, the second welding protrusion 223e and the second heat welding part 223f are formed. In the present embodiment, 9 second welding protrusions 223ea, 8 second connecting parts 223eb, and 8 second heat welding parts 223f are formed. As described above, the second welding protrusion 223ea is a portion of the second mounting part 31 that is not melted by heat welding. The second heat welding part 223f is a portion of the second mounting part 31 that is melted by heat welding. The second heat welding parts 223f are respectively attached to a part of the surface of the second welding protrusion 223ea. The second heat welding parts 223f are arranged in a state where they are separated by intervals. In the present embodiment, as described above, the second connecting part 223eb connects the adjacent second welding protrusions 223ea to each other. The second welding protrusion 223e is formed as a continuous protrusion by connecting the second connecting part 223eb to the second welding protrusion 223ea.

[0089] Furthermore, the third welding protrusion 223gb and the third heat welding part 223h are formed by welding the melted parts of the third mounting part 32 and the sheet 230. In this embodiment, the third welding protrusion 223gb, the third connection part 223ga, and the third heat welding part 223h are formed.

[0090] In the heat welding method of this embodiment, the shapes of the plurality of first welding protrusions 223ca and the plurality of first heat welding parts 223d are respectively based on the shape of the first heating protrusion 520. Therefore, the degree of freedom of the shape of the first mounting part 30 is increased.

[0091] B. Second Implementation Method:

[0092] B1. Structure of the second embodiment:

[0093] Fig.19 It is a figure for demonstrating the cartridge 20B of 2nd Embodiment. Fig.19 This is an enlarged view of a portion of the storage portion 220B in the case 20B in a state where the sheet 230 has not been thermally fused. Fig. 20 This is a diagram for explaining the cassette 20B in a state where the sheet 230 is thermally fused. Fig. 20 and Fig.10 correspond. Fig.21 4 is a diagram for explaining the second welding member 60. Figures 19 to 21As shown, in the second embodiment, the shapes of the first mounting portion 30B, the first welding protrusion 223Bca, the second mounting portion 31B, the second welding protrusion 223Bea, the third mounting portion 32B, the third welding protrusion 223Bg, and the second welding member 60 are different from those in the first embodiment. In addition, in the second embodiment, the box 20B does not include the first connecting portion 223cb, the second connecting portion 223eb, and the third connecting portion 223ga. Since the other structures are the same as those in the first embodiment, the same symbols as those in the first embodiment are marked and the detailed description is omitted.

[0094] like Fig. 20 As shown, the cassette 20B of the second embodiment includes 14 first welding protrusions 223Bca, 14 first thermal welding portions 223Bd, 9 second welding protrusions 223Bea, 9 second thermal welding portions 223Bf, a third welding protrusion 223Bgb, and a third thermal welding portion 223Bh.

[0095] Before describing the first welding protrusion 223Bca of the second embodiment, the box 20B before being heat-welded will be described. Fig.19 As shown, before being heat-fused with the sheet 230, the box 20B has a first mounting portion 30B, a second mounting portion 31B, and a third mounting portion 32B. The first mounting portion 30B, the second mounting portion 31B, and the third mounting portion 32B are convex portions formed on the storage bottom wall 223 of the box 20B before being heat-fused with the sheet 230. Fig.19 As shown, the first mounting portion 30B, the second mounting portion 31B and the third mounting portion 32B protrude from the storage bottom wall 223. The first mounting portion 30B, the second mounting portion 31B and the third mounting portion 32B are formed of raw materials that can be heat-welded. In the present embodiment, the first mounting portion 30B, the second mounting portion 31B and the third mounting portion 32B are formed of polypropylene. The first mounting portion 30B has 14 first circular portions 30Ba. The 14 first circular portions 30Ba are arranged along the outer edge of the opening 223a in a state where they are spaced apart. The first circular portion 30Ba has a circular shape when viewed in the Z direction. The second mounting portion 31B has 9 second circular portions 31Ba. The 9 second circular portions 31Ba are arranged along the edge of the supply portion positioning portion 223b except the edge on the opening 223a side in a state where they are spaced apart. The third mounting portion 32B is located on the -Y direction side of the first mounting portion 30B. The third mounting portion 32B has a circular shape when viewed in the Z direction.

[0096] Fig. 20 The first welded protrusion 223Bca shown is, Fig.19 The convex portion before heat welding shown in the figure is the portion of the first circular portion 30Ba that has not been melted by heat welding. Fig. 20As shown, the fourteen first welded protrusions 223ca are arranged along the outer edge of the opening 223a at intervals.

[0097] The first heat-welding portion 223Bd is: Fig.19 The first circular portion 30Ba of the first mounting portion 30B shown is a portion formed by melting by heat welding. Fig. 20 The first heat-welding portion 223Bd shown is formed between the first welding protrusion 223Bca and the sheet 230. The 14 first heat-welding portions 223Bd are attached to a portion of the surface of the 14 first welding protrusions 223Bca, respectively. Although not shown in the figure, the first heat-welding portion 223Bd is formed from the end of the first welding protrusion 223Bca on the -Z direction side to a portion of the step difference portion toward the portion of the storage bottom wall 223 where the first welding protrusion 223Bc is not formed. The portion of the first heat-welding portion 223Bd formed on the step difference portion is a portion where the portion of the first mounting portion 30B melted by heat welding flows into the step difference portion and solidifies at the step difference portion. The first heat-welding portion 223Bd covers the outer surface of the first welding protrusion 223Bca on the -Z direction side. When viewed in the +Z direction, the 14 first heat-welding portions 223Bd overlap each other so as to include one of the 14 first welded convex portions 223Bca. The 14 first heat-welding portions 223Bd are arranged at intervals.

[0098] The second welded protrusion 223Bea is: Fig.19 The convex portion before heat welding shown is a portion of the second circular portion 31Ba that has not been melted by heat welding. Fig. 20 The nine second weld protrusions 223Bea shown are arranged at intervals along the outer edge of the supply portion positioning portion 223b except for the edge on the opening 223a side.

[0099] The second heat-fusion portion 223Bf is: Fig.19 The second circular portion 31Ba of the second mounting portion 31B shown is a portion formed by melting by heat welding. Fig. 20The second heat-welding portion 223Bf shown is formed between the second welding protrusion 223Bea and the sheet 230. The nine second heat-welding portions 223Bf are attached to a portion of the surface of the nine second welding protrusions 223Bea, respectively. Although not shown, the second heat-welding portion 223Bf is formed from the end of the second welding protrusion 223Bea on the -Z direction side to a portion of the step difference portion toward the portion of the storage bottom wall 223 where the second welding protrusion 223Be is not formed. The portion of the second heat-welding portion 223Bf formed on the step difference portion is a portion where the portion of the second welding protrusion 223Be melted by heat welding flows into the step difference portion and solidifies at the step difference portion. The second heat-welding portion 223Bf covers the outer surface of the second welding protrusion 223Bea on the -Z direction side. When viewed in the +Z direction, the nine second heat-welding portions 223Bf overlap so as to each include one of the nine second welded convex portions 223Bea. The nine second heat-welding portions 223Bf are arranged at intervals.

[0100] The third welded convex portion 223Bgb is a portion of the third circular portion of the third mounting portion 32B that is not melted by heat welding. The third heat welded portion 223Bh is, Fig.19 The third circular portion shown is formed by melting by heat welding. Fig. 20 As shown, the third heat-bonded portion 223Bh is attached to the surface of the third welded protrusion 223Bgb.

[0101] B2. Thermal fusion method of sheet 230:

[0102] exist Fig.21 In order to explain the posture of the second welding member 60 during heat welding, the X direction, the Y direction, and the Z direction are shown. Fig.21 The X direction, Y direction, Z direction and Fig.19 Heat welding is performed while the X, Y, and Z directions are aligned. Fig.21 As shown, the second welding member 60 has a shape that is substantially rectangular in appearance. The second welding member 60 is configured to generate heat in a manner that the surface temperature becomes 280°C. In the present embodiment, the second welding member 60 is a heater. The second welding member 60 has a second bottom surface 610. The second bottom surface 610 is a surface that faces the storage bottom wall 223 that is a wall portion of the storage portion 220 during heat welding. The second bottom surface 610 has a first heating protrusion 620, a second heating protrusion 630, and a third heating protrusion 640.

[0103] The first heating protrusion 620 performs heat-fusion bonding on the first mounting portion 30B and the thin sheet 230. The first heating protrusion 620 is a protrusion formed on the second bottom surface 610. The first heating protrusion 620 is a continuous protrusion. In the present embodiment, the first heating protrusion 620 is configured in such a way that the outline has a hexagonal shape when viewed along the Z direction. The second heating protrusion 630 performs heat-fusion bonding on the second mounting portion 31B and the thin sheet 230. The second heating protrusion 630 is a protrusion formed on the second bottom surface 610. The second heating protrusion 630 is a continuous protrusion. The third heating protrusion 640 performs heat-fusion bonding on the third mounting portion 32B and the thin sheet 230. The third heating protrusion 640 is a protrusion formed on the second bottom surface 610. The third heating protrusion 640 is connected to the end of the first heating protrusion 620 on the -Y direction side.

[0104] The procedure of the method for welding the sheet 230 of the second embodiment is the same as that of the method for welding the sheet 230 of the first embodiment. The differences from the first embodiment will be described below. Fig.18 In step S20, Fig.19 The X-axis, Y-axis, and Z-axis of Fig.21 The X-axis, Y-axis, and Z-axis of the storage bottom wall 223 are aligned, and the second welding component 60 is arranged in a manner that the second bottom surface 610 and the storage bottom wall 223 are in an opposing state. In this state, the second welding component 60 is moved in the +Z direction as the welding direction, thereby performing welding. In the second embodiment, at the stage of step S20, when viewed in the +Z direction, the first heating protrusion 620 is configured in a manner that surrounds the opening 223a of the storage bottom wall 223. Moreover, when viewed in the +Z direction, the sheet 230 and the first mounting portion 30B are heat-welded in a state in which a part of the first heating protrusion 620 overlaps in a manner that includes the first mounting portion 30B. In addition, at the stage of step S20, when viewed in the +Z direction, the second heating protrusion 530 is along the edge of the supply portion positioning portion 223b of the storage bottom wall 223 except the edge on the opening 223a side. When viewed in the +Z direction, the sheet 230 and the second mounting portion 31B are heat-fused in a state where a portion of the second heating protrusion 630 overlaps so as to include the second mounting portion 31B. Also, when viewed in the +Z direction, the sheet 230 and the third mounting portion 32B are heat-fused in a state where a portion of the third heating protrusion 640 overlaps so as to include the third mounting portion 32B.

[0105] The plurality of first heat-bonded portions 223Bd are attached to a portion of the surface of the first heat-bonded protrusion 223Bca in a state where they are spaced apart from each other. Therefore, when the user peels off the sheet 230 from the storage bottom wall 223, the shape of the first heat-bonded portion 223Bd attached to the sheet 230 and peeled off becomes smaller than in a case where the plurality of first heat-bonded portions are continuous with each other. Therefore, even in a case where the portion of the first heat-bonded portion 223Bd peeled off from the storage bottom wall 223 enters the opening 223a, the possibility of a gap being generated between the liquid introduction portion 121 and the liquid supply portion 218 of the printing device 10 can be reduced compared to a case where the first heat-bonded portion 223Bd is continuous. Moreover, by covering the opening 223a with the sheet 230, it is possible to prevent foreign matter from entering the opening 223a.

[0106] When the first welding protrusion 223ca, the second welding protrusion 223ea, and the third welding protrusion 223gb are not distinguished, they are marked as "welding protrusion". When the first heat welding part 223d, the second heat welding part 223f, and the third heat welding part 223h are not distinguished, they are marked as "heat welding part". When the first mounting part 30, the second mounting part 31, and the third mounting part 32 are not distinguished, they are marked as "mounting part".

[0107] C. Other implementation methods:

[0108] C1. Other implementation methods 1:

[0109] (1) In the above embodiment, the liquid storage portion 217 and the storage portion 220 are formed by injection molding using polypropylene as a material, and the sheet 230 is formed of polyethylene terephthalate. Alternatively, the liquid storage portion and the storage portion may be formed of different materials, and the sheet may be formed of polypropylene. The sheet is formed of a material having a higher melting point than the material forming the storage portion.

[0110] (2) In the above-mentioned embodiment, the dimension of the sheet 230 in the X direction is larger than the interval in the X direction between the first box guide 224a and the second box guide 225a. In addition, for example, the sheet may be located at a position closer to the outside than either the first box guide or the second box guide in the X direction which is the short side direction of the box. Even in such a manner, since the sheet is disposed at a position between the first installation guide and the first box guide or between the second installation guide and the second box guide during the installation process, the installation action of the box to the box mounting portion cannot be smoothly performed due to the sheet. Thus, before the installation of the box relative to the box mounting portion is completed, the user can notice that the sheet has been forgotten to be peeled off.

[0111] (3) In the above embodiment, a fold line along the X direction, which is the width direction, is formed in a part of the sheet 230. Alternatively, the sheet may have no fold line and may be in a flat shape.

[0112] (4) In the above embodiment, the number of the first welding protrusions 223ca and the first heat welding part 223d is 14, and the number of the second welding protrusions 223ea and the second heat welding part 223f is 9. In addition, for example, the number of the first welding protrusions and the first heat welding part may be other than 14, such as 5 or 20, and the number of the second welding protrusions and the second heat welding part may be other than 9, such as 5 or 10. The configuration is such that the number of the first welding protrusions and the first heat welding part is the same, and the number of the second welding protrusions and the second heat welding part is the same.

[0113] (5) In the first embodiment, the box 20 before heat-fusion bonding with the sheet 230 includes the second mounting portion 31 and the third mounting portion 32, and the second welding protrusion 223e, the second heat-fusion portion 223f, the third welding protrusion 223g, and the third heat-fusion portion 223h are formed by heat-fusion bonding. In addition, for example, the box before heat-fusion bonding with the sheet may not include at least one of the second mounting portion and the third mounting portion.

[0114] (6) In the above embodiment, when viewed in the +Z direction, the heat-welding portions overlap in a manner that each includes one of the welding protrusions. For example, in a manner in which a hole is formed in the center of the first heating protrusion of the first welding member, when viewed in the Z direction, each heat-welding portion may not include the entire welding protrusion. When viewed in the +Z direction, the heat-welding portions only need to overlap with at least a portion of the welding protrusion. The heat-welding portions are attached to at least a portion of the surface of the welding protrusion that is opposite to the sheet.

[0115] (7) In the above embodiment, the sheet 230 is bonded to the first welding protrusion 223ca, the second welding protrusion 223ea, and the third welding protrusion 223gb via the first heat welding portion 223d, the second heat welding portion 223f, and the third heat welding portion 223h. In addition, for example, when viewed along the Z direction, in a mode in which each heat welding portion does not include the entire welding protrusion, the sheet may be directly bonded to a portion of the welding protrusion.

[0116] (8) In the above embodiment, when the supply unit connection process is performed, the sheet 230 is configured to be interposed between the device-side supply unit positioning portion 124 and the supply unit positioning portion 223b at the stage before the liquid introduction portion 121 of the cartridge mounting portion 12 and the liquid supply unit 218 of the cartridge 20 start to be connected. In addition, for example, in a mode in which the printing device does not include the first mounting guide portion 122ba and the second mounting guide portion 122ca, the sheet may not be configured to be interposed between the device-side supply unit positioning portion and the supply unit positioning portion.

[0117] (9) In the above embodiment, when the supply unit connection process is implemented, the sheet 230 is configured to be interposed between the device-side supply unit positioning portion 124 and the supply unit positioning portion 223b at the stage before the liquid introduction portion 121 of the cartridge mounting portion 12 and the liquid supply unit 218 of the cartridge 20 start to be connected. In addition, for example, in a mode in which the size of the sheet in the Y direction is smaller than that in the first embodiment, the sheet may not be configured to be interposed between the device-side supply unit positioning portion and the supply unit positioning portion.

[0118] (10) In the above embodiment, the first sheet end 233 of the sheet 230 extends outward from the storage rear wall 222 to such an extent that the first sheet end 233 covers a portion of the box engagement portion 222a. Alternatively, for example, the first sheet end of the sheet may not cover a portion of the box engagement portion.

[0119] C2. Other implementation methods 2:

[0120] (1) In the above-mentioned first embodiment, the first connection portion 223cb connects adjacent first welding protrusions 223ca to each other. In addition, the second connection portion 223eb connects adjacent second welding protrusions to each other, and the third connection portion 223ga connects the third welding protrusion 223gb and the first welding protrusion 223ca. In addition, for example, the first connection portion may be connected to any one of the adjacent first welding protrusions, or may not be connected to the adjacent first welding protrusions, but may be arranged between the adjacent first welding protrusions. In addition, the second connection portion may be connected to any one of the adjacent second welding protrusions, or may not be connected to the adjacent second welding protrusions, but may be arranged between the adjacent second welding protrusions. The third connection portion may be connected to any one of the third welding protrusion and the first welding protrusion, or may not be connected.

[0121] (2) For example, the cartridge may include one or two of the first connection portion, the second connection portion, and the third connection portion. The cartridge may not include a plurality of connection portions.

[0122] C3. Other implementation methods 3:

[0123] (1) In the above-mentioned embodiment, when observed along the Z direction in which the thin sheet and the first heat-melting portion 223d overlap, the first welding protrusion 223c has a hexagonal shape. In addition, for example, when observed along the Z direction, the first welding protrusion may also have a polygonal shape other than a hexagon, such as a quadrilateral or octagon, or may have a circular shape. In addition, in this specification, a continuous protrusion has a polygonal shape when observed along the direction in which the thin sheet and the heat-melting portion overlap, which means that when the contour of the continuous protrusion passing through the end on the opposite side of the end connected to the heat-melting portion is observed along the direction in which the thin sheet and the heat-melting portion overlap, the contour has a polygonal shape. Fig.12 In the figure, the contour of the first welded protrusion 223ca passing through the end portion 70 has a hexagonal shape.

[0124] (2) In the above embodiment, the second welding protrusion 223e is along the edge of the supply unit positioning portion 223b except the edge on the opening 223a side when viewed in the Z direction. For example, the second welding protrusion may be a continuous protrusion surrounding the supply unit positioning portion when viewed in the Z direction.

[0125] (3) In the above embodiment, a part of the 14 first welding protrusions, that is, 6 first welding protrusions, are configured to be arranged on the vertices of a hexagon. In addition, for example, the first welding protrusions may be configured to be arranged on a part of the vertices of the hexagon. In the embodiment in which the box has 6 first welding protrusions, it is also possible to configure that all the first welding protrusions are arranged on the vertices of the hexagon. In addition, for example, it is also possible to configure that all the first welding protrusions are arranged on the sides of a polygon.

[0126] C4. Other implementation methods 4:

[0127] (1) In the above embodiment, the first heat-welded portion 223d located on the side of the hexagon has a substantially elliptical shape when viewed along the Z direction. In addition, the first heat-welded portion located on the side of the hexagon may be a quadrilateral or triangular shape or a circular shape when viewed along the Z direction. The heat-welded portion may not be a shape in which the angle formed by the straight line passing through the intersection point and perpendicular to the -Y direction in which the sheet is peeled off and the tangent line passing through the end portion along the outer contour of the outer periphery of the non-overlapping portion and approaching the intersection point is an acute angle.

[0128] (2) In the above-mentioned embodiment, the angle formed by the straight line D1 passing through the first intersection FI and being perpendicular to the -Y direction in which the sheet 230 is peeled off, and the tangent line T passing through the end Ed along the outer contour of the outer periphery of the non-overlapping portion 223db when approaching the first intersection FI is configured to be an acute angle of 30°. In addition, for example, the angle formed by the straight line passing through the intersection and being perpendicular to the -Y direction in which the sheet is peeled off, and the tangent line passing through the end Ed along the outer contour of the outer periphery of the non-overlapping portion when approaching the intersection may be configured to be 15°, 45°, or 60°.

[0129] C5. Other implementation methods 5:

[0130] In the above-mentioned embodiment, the first welding member 50 and the second welding member 60 are configured to generate heat in a manner that the surface temperature becomes 280°C. In addition, the first welding member and the second welding member may also be configured to have a surface temperature of 200°C or 300°C. The surface temperatures of the first welding member and the second welding member may also be changed according to the combination of the material forming the storage portion and the material forming the sheet. By changing the temperature of the first welding member and the time of heat welding of the sheet and the mounting portion, the shapes and proportions of the formed welding protrusions and the heat welding portions may sometimes be different. It may also be configured to heat weld the sheet and the mounting portion at a temperature at which the material forming the sheet is not melted and the mounting portion is melted by the first welding member. In this method, the sheet and the welding protrusions are bonded via the heat welding portion by the heat welding portion being bonded to the sheet.

[0131] C6. Other implementation methods 6:

[0132] (1) In the first embodiment, the first welding member 50 includes the first heating protrusion 520, the second heating protrusion 530, and the third heating protrusion 540 on the first bottom surface 510. In addition, in a configuration in which the cassette does not include the second mounting portion and the third mounting portion, the first welding member does not include the second heating protrusion and the third heating protrusion. In addition, in a configuration in which the cassette includes the second mounting portion and the third mounting portion, the first welding member does not include the second heating protrusion and the third heating protrusion.

[0133] (2) In the first embodiment, the first welding member 50 includes a plurality of heating protrusions. Alternatively, for example, the first welding member may include six first heating protrusions. In this embodiment, six first welding protrusions and six first heat welding portions are formed.

[0134] C7. Other implementation methods 7:

[0135] In the above-mentioned embodiment, the sheet 230 and the first mounting portion 30 are heat-welded by the first welding member 50 in a manner that at least a portion of the first welding protrusion 223ca is arranged on each vertex of the polygon. In addition, for example, in a manner in which the first heating protrusion of the first welding member is welded in a state overlapping with the side of the first mounting portion when viewed in the +Z direction, the sheet and the first mounting portion may be heat-welded in a manner in which all the first welding protrusions are arranged on the sides of the polygon.

[0136] C8. Other implementation methods 8:

[0137] In the first embodiment, the first heat welding portion 223d has a substantially elliptical shape when viewed in the Z direction. For example, in an embodiment in which the first heating protrusion of the first welding member has a square shape when viewed in the Z direction, the first heat welding portion may be substantially quadrilateral.

[0138] C9. Other implementation methods 9:

[0139] In the second embodiment, the first heating protrusion 620, the second heating protrusion 630, and the third heating protrusion 640 of the second welding member 60 overlap in a manner including the mounting portion. In addition, the first heating protrusion, the second heating protrusion, and the third heating protrusion of the second heating member may be arranged so as to overlap with a portion of the mounting portion when viewed in the +Z direction in a state where they are opposed to the storage bottom wall. Compared with a method in which a portion of the mounting portion overlaps, the sheet and the storage bottom wall are firmly welded.

[0140] D.Other ways:

[0141] The present disclosure is not limited to the above-mentioned embodiments, and can be implemented in various ways without departing from the scope of the present disclosure. For example, in order to solve part or all of the problems of the present disclosure, or to achieve part or all of the effects of the present disclosure, the technical features of the above-mentioned embodiments corresponding to the technical features in the various modes described below can be appropriately replaced or combined. In addition, as long as the technical feature is not described as a necessary feature in this specification, it can be appropriately deleted.

[0142] (1) According to one embodiment of the present disclosure, there is provided a box installed on a printing device having a liquid introduction portion. The box comprises: a liquid storage portion for storing liquid; a liquid supply portion capable of supplying the liquid stored in the liquid storage portion to the printing device by connecting to the liquid introduction portion; a storage portion that internally stores a part of the liquid supply portion and comprises a wall portion, wherein the wall portion has an opening, a plurality of welding protrusions, and a plurality of hot-melt bonding portions, wherein the opening is for the liquid introduction portion to be inserted and connected to the liquid supply portion, the plurality of welding protrusions are a plurality of protrusions arranged along the outer edge of the opening in a state where they are spaced apart from each other, and the plurality of hot-melt bonding portions are attached to the plurality of The plurality of welded protrusions are arranged on a portion of the surface of the welded protrusions and are arranged in a state where they are separated from each other; a thin sheet, which covers the opening, the plurality of welded protrusions and the plurality of hot-melt-bonded portions and is bonded to the plurality of welded protrusions in a peelable manner, the plurality of welded protrusions are respectively portions of the protrusions formed on the wall portion before the thin sheet is hot-melt-bonded and are portions of the protrusions formed by raw materials that can be hot-melt-bonded that are not melted by hot-melt-bonding, and the plurality of hot-melt-bonded portions are respectively portions of the protrusions formed by melting by hot-melt-bonding before the thin sheet is hot-melt-bonded, and a portion is connected to the thin sheet.

[0143] According to the box of this method, a plurality of heat-bonded parts are attached to a part of the surface of the welding protrusion in a state where they are spaced apart from each other. Therefore, when the user peels the sheet off from the wall, the shape of the heat-bonded part attached to the sheet and peeled off becomes smaller than in a method where the heat-bonded parts are continuous. Therefore, even if the part of the heat-bonded part peeled off from the wall enters the opening, the possibility of a gap being generated between the liquid introduction part and the liquid supply part of the printing device can be reduced compared to a method where a plurality of heat-bonded parts are continuous with each other. Moreover, by covering the opening with the sheet, foreign matter can be prevented from entering the opening.

[0144] (2) In the box of the above-mentioned method, the following method can also be adopted, that is, the wall portion also has a plurality of connecting portions, and the plurality of connecting portions connect adjacent welding protrusions among the plurality of welding protrusions to each other, and the plurality of welding protrusions and the plurality of connecting portions constitute a continuous protrusion surrounding the opening.

[0145] According to the cartridge of this aspect, the welded convex portions overlapped by the heat-welding portion are connected by the plurality of connecting portions, so that when ink leaks from the opening, the connecting portions can block it.

[0146] (3) In the box of the above-mentioned method, the following method may also be adopted, that is, the continuous one protrusion is constructed to have a polygonal shape when viewed along the direction in which the thin sheet and the hot melt portion overlap, and at least a portion of the multiple welded protrusions are arranged on each vertex of the polygon, and the multiple connecting portions are continuously connected to the thin sheet between adjacent welded protrusions.

[0147] According to the box of this aspect, since the connection part between the adjacent welded protrusions is continuously connected to the sheet, the connection part between the apexes is in close contact with the sheet, thereby preventing foreign matter from entering between the connection part and the sheet.

[0148] (4) In the box of the above-mentioned method, the following method can also be adopted, that is, the hot melt bonding part located on the side of the polygon among the multiple hot melt bonding parts is constructed to have an overlapping part overlapping with the welding protrusion and a non-overlapping part not overlapping with the welding protrusion when observed along the direction in which the thin sheet overlaps with the hot melt bonding part, and the angle formed by the following straight line and the following tangent line is an acute angle, wherein the straight line passes through the intersection closest to the front when observed along the direction in which the thin sheet is peeled off from among the intersection points between the line dividing the overlapping part and the non-overlapping part on the outer periphery of the hot melt bonding part and is perpendicular to the direction in which the thin sheet is peeled off, and the tangent line passes through the end portion when approaching the intersection point along the outer contour of the outer periphery of the non-overlapping part.

[0149] The non-overlapping portion may adhere to the sheet and be peeled off from the wall when the sheet is peeled off. According to the box of this method, the portion where the non-overlapping portion is located in the angle range formed by the straight line parallel to the peeling direction and the straight line perpendicular to the peeling direction passing through the point that divides the overlapping portion and the non-overlapping portion is less than 90°. In other words, when observing along the direction in which the sheet overlaps with the hot melt portion, there is a portion without the hot melt portion within the angle range formed by the straight line parallel to the peeling direction and the straight line perpendicular to the peeling direction. When a force to peel off the sheet is applied to the boundary between the portion and the non-overlapping portion, the possibility of the sheet being peeled off while adhering to the non-overlapping portion becomes lower than that in the method in which the portion where the non-overlapping portion is located is greater than 90°. As a result, when the user peels off the sheet in the peeling direction, the easily peelable portion of the hot melt portion can be easily separated from the sheet.

[0150] (5) According to another aspect of the present disclosure, a method for hot-melting a sheet is provided. In the method for hot-melting a sheet, in a state where a sheet formed of a raw material capable of hot-melting covers an opening and a mounting portion formed on a wall portion of a storage portion, the mounting portion and the sheet are hot-melted by a welding component, thereby forming a plurality of welding protrusions and a plurality of hot-melting portions, wherein the storage portion internally stores a portion of a liquid supply portion that enables liquid stored in a liquid storage portion to flow out to a printing device, the mounting portion is a protrusion formed of a raw material capable of hot-melting, the plurality of welding protrusions are portions of the mounting portion that are not melted by hot-melting, and are a plurality of protrusions arranged along the outer edge of the opening in a state where they are spaced apart from each other, and the plurality of hot-melting portions are portions of the mounting portion that are melted by hot-melting and attached to a portion of the surface of the plurality of welding protrusions, and are arranged in a state where they are spaced apart from each other.

[0151] (6) According to the hot melting method of a thin sheet of the above-mentioned embodiment, the melting component has a surface opposite to the wall portion during hot melting, and the surface has a plurality of heating protrusions, the plurality of heating protrusions are a plurality of protrusions, and are formed in a state where they are separated from each other, and the mounting portion is a continuous protrusion surrounding the opening. The plurality of heating protrusions perform hot melting on the thin sheet and the mounting portion while being in contact with the thin sheet, thereby forming the plurality of melting protrusions and the plurality of hot melting portions.

[0152] In the heat welding method of the sheet of this embodiment, the shapes of the plurality of welding protrusions and the plurality of heat welding parts are based on the shape of the heating protrusion. Therefore, the degree of freedom of the shape of the mounting part is increased.

[0153] (7) According to the above-mentioned method for hot-melt bonding of a thin sheet, the following method may also be adopted, namely, the continuous one protrusion has a polygonal shape when observed along the direction in which the thin sheet and the mounting portion are hot-melt bonded, i.e., the welding direction, and the mounting portion and the thin sheet are hot-melt bonded by the multiple heating protrusions in a manner such that at least a portion of the multiple welding protrusions are arranged on each vertex of the polygon.

[0154] (8) According to the hot melt bonding method of the thin sheet described above, the following method can also be adopted, that is, the hot melt bonding part located on the side of the polygon among the multiple hot melt bonding parts is formed to have an overlapping part overlapping with the welding protrusion and a non-overlapping part not overlapping with the welding protrusion when observed along the welding direction, and the angle formed by the following straight line and the following tangent line becomes an acute angle, wherein the straight line passes through the intersection between the line dividing the overlapping part and the non-overlapping part on the outer periphery of the hot melt bonding part and is perpendicular to the peeling direction, and the tangent line passes from the end portion when approaching the intersection along the outer contour of the outer periphery of the non-overlapping part.

[0155] (9) According to the above-mentioned method for hot-melting a thin sheet, the following method can also be adopted, that is, the mounting portion is a plurality of protrusions arranged along the outer edge of the opening in a state where they are spaced apart from each other, the welding component has a surface that is opposite to the wall portion during hot-melting, the surface has a heating protrusion, the heating protrusion protrudes from the surface, and when the surface is opposite to the wall portion, when viewed along the direction in which the thin sheet and the mounting portion are hot-melted, i.e., the welding direction, the opening is surrounded and a portion overlaps in a manner that includes the mounting portion.

[0156] Explanation of symbols

[0157] 1…printing system; 10…printing device; 11…storage box; 12…box mounting portion; 13…slide; 14…ejection head; 15…tube; 16…driving mechanism; 17…control unit; 20…box; 20B…box of the second embodiment; 30…first mounting portion; 30B…first mounting portion of the second embodiment; 30Ba…first circular portion; 31…second mounting portion; 31B…second mounting portion of the second embodiment; 31Ba…second circular portion; 32…third mounting portion; 32B…third mounting portion of the second embodiment; 50…first welding component; 60…second welding component; 70…end portion; 110…front cover; 111…replacement cover; 120…mounting box; 120a…storage chamber; 121…liquid inlet 122…supporting member; 122a…supporting bottom wall; 122aa…supporting opening; 122b…first supporting side wall; 122ba…first mounting guide; 122c…second supporting side wall; 122ca…second mounting guide; 123…liquid storage portion; 124…positioning portion of the device-side supply portion; 125…device-side terminal portion; 126…engaging forming body; 126a…mounting engaging portion; 160…synchronous belt; 161…driving motor; 200…box body; 210…liquid storage body; 211…front wall; 212…rear wall; 213…upper wall; 214…bottom wall; 215…first side wall; 216…second side wall; 217…liquid storage portion; 218…liquid supply portion; 218a…gasket ; 220…storage portion; 220B…storage portion of the second embodiment; 221…storage front wall; 222…storage rear wall; 222a…box engaging portion; 223…storage bottom wall; 223Bc…first welding protrusion of the second embodiment; 223Bd…first hot welding portion of the second embodiment; 223Be…second welding protrusion of the second embodiment; 223Bf…second hot welding portion of the second embodiment; 223Bg…third welding protrusion of the second embodiment; 223Bh…third hot welding portion of the second embodiment; 223a…opening; 223b…supply portion positioning portion; 223c…first welding protrusion; 223ca…first welding protrusion; 223cb…first connecting portion; 223d…first hot welding 223da…overlapping portion; 223db…non-overlapping portion; 223e…second fusion bonding protrusion; 223ea…second fusion bonding protrusion; 223eb…second connecting portion; 223f…second hot fusion bonding portion; 223g…third fusion bonding protrusion; 223ga…third connecting portion; 223gb…third fusion bonding protrusion; 223h…third hot fusion bonding portion; 224…first storage side wall; 224a…first box guide; 225…second storage side wall; 225a…second box guide; 230…sheet; 231…first sheet side; 232…second sheet side; 233…first sheet end; 234…second sheet end; 235…liquid absorber; 250…circuit substrate; 251…box side terminal;510…first bottom surface; 520…first heating protrusion of the first welding component; 530…second heating protrusion of the first welding component; 540…third heating protrusion of the first welding component; 610…second bottom surface; 620…first heating protrusion of the second welding component; 630…second heating protrusion of the second welding component; 640…third heating protrusion of the second welding component; CA…central axis; D1…straight line; Ed…end; FI…first intersection; PM…printing medium; RF…rotation fulcrum; SD…step difference portion; T…tangent line. ;

Claims

1. A cartridge mounted on a printing device having a liquid introduction portion, comprising: A liquid storage part for storing liquid; a liquid supply unit that can supply the liquid contained in the liquid containing unit to the printing device by being connected to the liquid introduction unit; a receiving portion, which receives a part of the liquid supply portion therein and comprises a wall portion, wherein the wall portion has an opening, a plurality of welding protrusions, and a plurality of heat welding portions, wherein the opening is for the liquid introduction portion to be inserted and connected to the liquid supply portion, the plurality of welding protrusions are a plurality of protrusions arranged along the outer edge of the opening in a state where they are spaced apart from each other, and the plurality of heat welding portions are attached to a part of the surface of the plurality of welding protrusions and are arranged in a state where they are spaced apart from each other; a sheet which covers the opening, the plurality of welded protrusions and the plurality of heat-welded portions and is bonded to the plurality of welded protrusions in a releasable manner, The plurality of welded protrusions are respectively protrusions formed on the wall portion before the sheet is welded and are portions of the protrusions formed of a raw material capable of being welded that are not melted by the welded portion. Each of the plurality of heat-welded portions is a portion of the convex portion that is melted by heat-welding before heat-welding with the sheet, and a portion of each portion is in contact with the sheet.

2. The box according to claim 1, wherein The wall portion further includes a plurality of connection portions, the plurality of connection portions connecting adjacent welding protrusions among the plurality of welding protrusions. The plurality of welded protrusions and the plurality of connecting portions constitute a single continuous protrusion surrounding the opening.

3. The box according to claim 2, wherein The continuous protrusion is configured to have a polygonal shape when viewed along the direction in which the sheet and the heat-welded portion overlap, and at least a portion of the plurality of welded protrusions are arranged on each vertex of the polygon. The plurality of connection portions are continuously connected to the sheet between adjacent welded protrusions.

4. The box according to claim 3, wherein The heat-melt bonding part among the multiple heat-melt bonding parts located on the side of the polygon is constructed to have an overlapping part overlapping with the welding protrusion and a non-overlapping part not overlapping with the welding protrusion when viewed along the direction in which the thin sheet overlaps with the heat-melt bonding part, and the angle formed by the following straight line and the following tangent line is an acute angle, wherein the straight line passes through the intersection closest to the front when viewed along the direction in which the thin sheet is peeled off, among the intersection points between the line dividing the overlapping part and the non-overlapping part on the outer periphery of the heat-melt bonding part and is perpendicular to the direction in which the thin sheet is peeled off, and the tangent line passes through the end portion when approaching the intersection point along the outer contour of the outer periphery of the non-overlapping part.

5. A method for thermally welding a thin sheet, wherein: In a state where a sheet formed of a raw material capable of heat-welding covers an opening formed on a wall portion of the storage portion and a mounting portion, the mounting portion and the sheet are heat-welded by a welding component to form a plurality of welding protrusions and a plurality of heat-welded portions. The storage unit internally stores a portion of a liquid supply unit that enables the liquid stored in the liquid storage unit to flow out to the printing device. The mounting portion is a convex portion formed of a material capable of thermal fusion. The plurality of welded protrusions are portions of the mounting portion that are not melted by heat welding, and are arranged along the outer edge of the opening at intervals. The plurality of heat-welded portions are portions of the mounting portion that are melted and formed by heat-welding and adhere to a portion of the surface of the plurality of welded protrusions, and are arranged at intervals from each other.

6. The thermal welding method of a sheet according to claim 5, wherein: The welding member includes a surface facing the wall portion during thermal welding. The surface has a plurality of heating protrusions, and the plurality of heating protrusions are a plurality of protrusions formed in a state of being spaced apart from each other. The mounting portion is a continuous convex portion surrounding the opening. The plurality of heating protrusions thermally fuse the sheet and the mounting portion while being in contact with the sheet, thereby forming the plurality of welding protrusions and the plurality of thermally welded portions.

7. The thermal welding method of a sheet according to claim 6, wherein: The continuous protrusion has a polygonal shape when viewed along the direction in which the sheet and the mounting portion are thermally welded, that is, the welding direction. The mounting portion and the sheet are thermally welded by the plurality of heating protrusions such that at least a portion of the plurality of welding protrusions is disposed on each vertex of the polygon.

8. The thermal welding method of a sheet according to claim 7, wherein: The heat-welding portion among the multiple heat-welding portions located on the side of the polygon is formed to have an overlapping portion overlapping with the welding protrusion and a non-overlapping portion not overlapping with the welding protrusion when observed along the welding direction, and the angle formed by the following straight line and the following tangent becomes an acute angle, wherein the straight line passes through the intersection between the line dividing the overlapping portion and the non-overlapping portion on the outer periphery of the heat-welding portion and is perpendicular to the peeling direction, and the tangent passes from the end portion when approaching the intersection along the outer contour of the outer periphery of the non-overlapping portion.

9. The method for thermally welding a sheet according to claim 5, wherein: The mounting portion is a plurality of protrusions arranged along the outer edge of the opening at intervals. The welding member includes a surface facing the wall portion during thermal welding. The surface has a heating protrusion, which protrudes from the surface and surrounds the opening when viewed along the direction in which the sheet and the mounting portion are thermally welded, i.e., the welding direction, with the surface facing the wall portion, and partially overlaps in a manner that includes the mounting portion.

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