Magnetic tape cartridge and manufacturing method for magnetic tape cartridge

Abstract

To provide a magnetic tape cartridge and a manufacturing method for the magnetic tape cartridge capable of selectively imparting a disassembly prevention effect according to user needs.SOLUTION: A magnetic tape cartridge includes: a magnetic tape; and a case that is a housing inside which a space capable of accommodating the magnetic tape is formed by fastening a first case member and a second case member, and that has a first fastening hole to which a first fastening member for fastening the first case member and the second case member is attached, and a second fastening hole to which a second fastening member attached in a manner different from the first fastening member and for preventing disassembly of the housing by fastening the first case member and the second case member is attached.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The disclosed technology relates to a magnetic tape cartridge and a method for manufacturing a magnetic tape cartridge. [Background technology]

[0002] Patent document 1 describes a tape cassette comprising an upper shell, a lower shell, a tape-like recording medium contained within both shells, and a shell connecting means for connecting the two shells, characterized in that the shell connecting means is composed of a boss portion and a push-in pin with a partially deformed portion.

[0003] Patent document 2 describes a recording media cartridge in which an upper case and a lower case are joined by a number of screws and which has a case for housing recording media, the recording media cartridge being characterized in that paint is applied to the head of at least one of the multiple screws joining the upper case and the lower case.

[0004] Patent document 3 describes a write-once magnetic tape system that includes a tape cartridge including a long magnetic tape suitable for recording and storing electronic data and an electronic memory device, and a tape drive that receives the tape cartridge and reads the memory device, the drive operating only in a write-once mode according to the information read from the memory device. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 9-91923 [Patent Document 2] JP 2005-135486 A [Patent Document 3] JP 2003-123342 A Summary of the Invention

[0006] One embodiment of the technique disclosed herein provides a magnetic tape cartridge and a method for manufacturing the magnetic tape cartridge that can selectively impart a decomposition suppression effect according to user needs. [Means for solving the problem]

[0007] A first aspect of the technology disclosed herein is a magnetic tape cartridge comprising: a magnetic tape; and a housing in which a space capable of accommodating the magnetic tape is formed by fastening a first case member and a second case member, the case having a first fastening hole to which a first fastening member that fastens the first case member and the second case member is attached, and a second fastening hole to which a second fastening member that is attached in a manner different from the first fastening member and that prevents disassembly of the housing by fastening the first case member and the second case member is attached.

[0008] A second aspect of the technology disclosed herein is a magnetic tape cartridge according to the first aspect, in which multiple first fastening holes are formed, with at least one first fastening hole formed at a position corresponding to each of the four corners of the housing.

[0009] A third aspect of the technique of the present disclosure is the magnetic tape cartridge according to the second aspect, in which the second fastening hole is formed in at least one of the positions corresponding to the four corners of the housing.

[0010] A fourth aspect of the technology of the present disclosure is the magnetic tape cartridge according to the second aspect, in which the second fastening hole is formed in one of the positions corresponding to the four corners of the housing.

[0011] A fifth aspect of the technique of the present disclosure is the magnetic tape cartridge according to the third aspect, wherein the second fastening hole is formed at a position a predetermined distance away from the first fastening hole.

[0012] A sixth aspect of the technology disclosed herein is a magnetic tape cartridge according to the third aspect, in which the second fastening hole is formed in a corner diagonally opposite to the corner in which the non-contact communication medium is housed in the housing.

[0013] A seventh aspect of the technique of the present disclosure is the magnetic tape cartridge according to the first aspect, in which the attachment method of the second fastening member is a one-way method in which the second fastening member engages with a tool only in the fastening direction.

[0014] An eighth aspect of the technique of the present disclosure is the magnetic tape cartridge according to the first aspect, in which cap members are attached to the second fastening holes to which no second fastening members are attached.

[0015] A ninth aspect of the technology disclosed herein is a manufacturing method for a magnetic tape cartridge having a housing capable of accommodating magnetic tape, the case being capable of forming a space inside by fastening a first case member and a second case member, the method including forming a first fastening hole to which a first fastening member that fastens the first case member and the second case member is attached, and forming a second fastening hole to which a second fastening member that prevents disassembly of the case by fastening the first case member and the second case member can be attached in a manner different from that of the first fastening member.

[0016] A tenth aspect of the technology disclosed herein is a magnetic tape cartridge manufacturing method according to the ninth aspect, which includes fastening a first case member and a second case member by attaching a first fastening member to the first fastening hole, and selecting whether or not to attach a second fastening member to the second fastening hole. [Brief description of the drawings]

[0017] [Figure 1] 1 is a schematic perspective view showing an example of the appearance of a magnetic tape cartridge according to an embodiment. [Diagram 2] 1 is a schematic perspective view showing an example of the appearance of a magnetic tape cartridge according to an embodiment. [Diagram 3]1 is a schematic perspective view showing an example of the appearance of a magnetic tape cartridge according to an embodiment. [Figure 4] 1 is a schematic perspective view showing an example of the appearance of a magnetic tape cartridge according to an embodiment. [Diagram 5] FIG. 1 is a schematic perspective view illustrating an example of the appearance of a fastening member according to an embodiment. [Figure 6] 4 is a flowchart showing an example of a process for attaching a fastening member according to the embodiment. [Figure 7] FIG. 1 is a schematic perspective view illustrating an example of the appearance of a fastening member according to an embodiment. [Figure 8] 1 is a schematic perspective view showing an example of the appearance of a magnetic tape cartridge according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] First, the terms used in the following description will be explained.

[0019] 1 to 4, the direction of arrow A is the front direction of the magnetic tape cartridge 10, and the front side of the magnetic tape cartridge 10 is the front side of the magnetic tape cartridge 10. In the following description of the structure of the magnetic tape cartridge 10, "front" refers to the front side of the magnetic tape cartridge 10.

[0020] 1 to 4, for convenience of explanation, the direction opposite to the front direction of the magnetic tape cartridge 10 is referred to as the rear direction of the magnetic tape cartridge 10, and the rear direction of the magnetic tape cartridge 10 is referred to as the rear side of the magnetic tape cartridge 10. In the following explanation of the structure of the magnetic tape cartridge 10, "rear" refers to the rear side of the magnetic tape cartridge 10.

[0021] 1 to 4, the direction of arrow B perpendicular to the direction of arrow A is defined as the right direction, and the right side of the magnetic tape cartridge 10 is defined as the right side of the magnetic tape cartridge 10. In the following description of the structure of the magnetic tape cartridge 10, "right" refers to the right side of the magnetic tape cartridge 10.

[0022] 1 to 4, the direction opposite to the right side of the magnetic tape cartridge 10 is referred to as the left side of the magnetic tape cartridge 10, and the left side of the magnetic tape cartridge 10 is referred to as the left side of the magnetic tape cartridge 10. In the following description of the structure of the magnetic tape cartridge 10, "left" refers to the left side of the magnetic tape cartridge 10.

[0023] 1 to 4, for convenience of explanation, the direction perpendicular to the directions of arrows A and B is indicated by arrow C, the direction of arrow C is the upward direction of the magnetic tape cartridge 10, and the upward side of the magnetic tape cartridge 10 is the upper side of the magnetic tape cartridge 10. In the following explanation of the structure of the magnetic tape cartridge 10, "upper" refers to the upper side of the magnetic tape cartridge 10.

[0024] 1 to 4, for convenience of explanation, the direction opposite to the upper direction of the magnetic tape cartridge 10 is referred to as the lower direction of the magnetic tape cartridge 10, and the lower side of the magnetic tape cartridge 10 is referred to as the lower side of the magnetic tape cartridge 10. In the following explanation of the structure of the magnetic tape cartridge 10, "lower" refers to the lower side of the magnetic tape cartridge 10.

[0025] As shown in FIG. 1 as an example, the magnetic tape cartridge 10 has a rectangular box-shaped case 12 when viewed from above (i.e., when viewed from the normal direction of the upper surface 12D). In other words, the case 12 is a square or rectangular parallelepiped housing when viewed from above. The magnetic tape cartridge 10 is an example of a "magnetic tape cartridge" according to the technology of the present disclosure. The case 12 is made of resin such as polycarbonate and has an upper case 14 and a lower case 16. The upper case 14 and the lower case 16 are fastened together by screws with the lower peripheral surface of the upper case 14 and the upper peripheral surface of the lower case 16 in contact with each other. Details of fastening by screws will be described later. The upper case 14 and the lower case 16 may be joined together by welding (e.g., ultrasonic welding) in addition to being fastened by screws. The case 12 is an example of a "case" according to the technology of the present disclosure. Upper case 14 is an example of a "first case member" according to the technology of the present disclosure, and lower case 16 is an example of a "second case member" according to the technology of the present disclosure.

[0026] The cartridge reel 18 is rotatably accommodated inside the case 12. In other words, the cartridge reel 18 is accommodated in a space formed by the upper case 14 and the lower case 16. The cartridge reel 18 includes a reel hub 18A, an upper flange 18B1, and a lower flange 18B2. The reel hub 18A is formed in a cylindrical shape. The reel hub 18A is the axial center of the cartridge reel 18, and the axial direction of the reel hub 18A is aligned with the up-down direction of the case 12, and is disposed in the center of the case 12. Each of the upper flange 18B1 and the lower flange 18B2 is formed in an annular shape. The upper end of the reel hub 18A is fixed to the center of the upper flange 18B1 in plan view, and the lower end of the reel hub 18A is fixed to the center of the lower flange 18B2 in plan view. The magnetic tape MT is wound around the outer circumferential surface of the reel hub 18A, and the widthwise ends of the magnetic tape MT are held by an upper flange 18B1 and a lower flange 18B2. The reel hub 18A and the lower flange 18B2 may be molded as a single unit.

[0027] An opening 12B is formed on the rear side of the right wall 12A of the case 12. The magnetic tape MT is pulled out from the opening 12B. The magnetic tape MT is an example of the "magnetic tape" according to the technology of the present disclosure. A cartridge memory 44 is housed in the right front corner 13A of the case 12. The cartridge memory 44 is equipped with an IC (Integrated Circuit) chip (not shown) having an NVM (Non-Volatile Memory). In this embodiment, a so-called passive RFID (Radio Frequency IDentifier) ​​tag is adopted as the cartridge memory 44, and various information is read and written to the cartridge memory 44 in a non-contact manner. Specifically, information is read and written to the cartridge memory 44 by a magnetic field penetrating the cartridge memory 44. The cartridge memory 44 is an example of the "non-contact communication medium" according to the technology of the present disclosure.

[0028] The cartridge memory 44 stores management information for managing the magnetic tape cartridge 10. The management information includes, for example, information about the cartridge memory 44 (for example, information capable of identifying the magnetic tape cartridge 10), and information about the magnetic tape MT (for example, information indicating the recording capacity of the magnetic tape MT, information indicating an overview of the data recorded on the magnetic tape MT, information indicating the items of the data recorded on the magnetic tape MT, information indicating the recording format of the data recorded on the magnetic tape MT, etc.).

[0029] As an example, as shown in Fig. 2, a label for identifying the magnetic tape cartridge 10 may be provided on the surface of the case 12 of the magnetic tape cartridge 10. In the example shown in Fig. 2, the label can be attached to the surface of the front wall 12C of the case 12. The label has, for example, a rectangular shape with its long side aligned along the longitudinal direction of the front wall 12C of the case 12. For example, a barcode and a character string are displayed on the label as an identifier.

[0030] A cover 19 that covers the opening 12B is provided on the rear side of the right wall 12A of the case 12. When the magnetic tape cartridge 10 is not in use, the cover 19 is closed to prevent the magnetic tape MT from being removed from the case 12.

[0031] As an example, as shown in Figs. 3 and 4, a plurality of first fastening holes 20 are formed in the lower surface 12E of the case 12. In the example shown in Fig. 3, four first fastening holes 20 are formed. The plurality of first fastening holes 20 are provided at least one at each of the positions corresponding to the four corners of the case 12. In the example shown in Fig. 3, one first fastening hole 20 is provided at each of the positions corresponding to the four corners of the case 12. Specifically, one first fastening hole 20 is provided at each of the positions corresponding to the right front corner 13A, the right rear corner 13B, the left front corner 13C, and the left rear corner 13D of the case 12. The first fastening holes 20 are an example of a "first fastening hole" according to the technology of the present disclosure.

[0032] Here, the positions corresponding to the four corners refer to positions within a range on the one corner side of the midpoint of the distance from one corner to the adjacent other corner, which is a predetermined range centered on each of the four corners when the case 12 is viewed in plan. The positions at which the first fastening holes 20 are provided are appropriately set according to the structure and / or design strength of the case 12, so long as they correspond to the four corners.

[0033] The first fastening holes 20 are formed from the lower case 16 to the upper case 14. A first fastening member 22 is attached to each of the first fastening holes 20. The first fastening member 22 is inserted from the lower case 16 to the upper case 14, mechanically joining the two together. This fastens the upper case 14 and the lower case 16 together. The first fastening member 22 is an example of a "first fastening member" according to the technology of the present disclosure.

[0034] The first fastening member 22 may be, for example, a screw having a cross hole formed in the head as a drive hole. The first fastening member 22 may be made of metal. In this case, the first fastening member 22 is attached to the first fastening hole 20 using an electric Phillips screwdriver or flat head screwdriver.

[0035] Meanwhile, various information is recorded on the magnetic tape MT in the magnetic tape cartridge 10, and the information is read and written as necessary. Such information may include highly confidential information. Therefore, various means for preventing unauthorized reading and writing of information from the magnetic tape cartridge 10 have been considered. However, if the cartridge reel 18 on which the magnetic tape MT is wound is replaced in the magnetic tape cartridge 10, the magnetic tape MT may be tampered with. Therefore, there is a demand for preventing disassembly of the magnetic tape cartridge 10.

[0036] Therefore, in addition to the first fastening hole 20, a second fastening hole 30 is formed in the underside 12E of the case 12. In the example shown in FIG. 3, one second fastening hole 30 is formed. The second fastening hole 30 is provided at one of the positions corresponding to the four corners of the case 12. In the example shown in FIG. 3, the second fastening hole 30 is provided at a position corresponding to the left rear corner 13D of the four corners of the case 12. The second fastening hole 30 is an example of a "second fastening hole" according to the technology of the present disclosure.

[0037] The left rear corner 13D of the case 12 is diagonally opposite to the right front corner 13A in which the cartridge memory 44 is stored. That is, the second fastening hole 30 is provided in a corner of the case 12 diagonally opposite to the corner in which the cartridge memory 44 is stored. Here, being provided in a diagonal corner means that the second fastening hole 30 is provided on the diagonal corner side of the midpoint of the distance from the diagonal corner to the adjacent corner, within a predetermined range centered on the diagonal corner when the case 12 is viewed in plan.

[0038] Moreover, the second fastening hole 30 is formed at a position a predetermined distance L away from the first fastening hole 20. Here, the distance L is the distance between the center of the second fastening hole 30 and the center of the first fastening hole 20. The distance L is set to 5 mm or more. The upper limit of the distance L is set appropriately taking into consideration the possible arrangement range of the first fastening hole 20 and the second fastening hole 30, the efficiency of the fastening work, and the like. For example, the distance L is set to 15 mm or less.

[0039] The second fastening hole 30 is formed from the lower case 16 to the upper case 14. A second fastening member 32 is attached to the second fastening hole 30. The second fastening member 32 is attached to the second fastening hole 30 in a manner different from that of the first fastening member 22. The second fastening member 32 is an example of a "second fastening member" according to the technology of the present disclosure.

[0040] As an example, as shown in FIG. 5, the second fastening member 32 is attached by a one-way system that engages with a tool only in the fastening direction. In the example shown in FIG. 5, the second fastening member 32 is a screw that is attached by a one-way system. The second fastening member 32 is made of metal, for example. Specifically, a first engagement portion 32A1 and a second engagement portion 32A2 are formed on the head 32A of the second fastening member 32. The first engagement portion 32A1 and the second engagement portion 32A2 are mountain-shaped portions that protrude upward on the head 32A. The first engagement portion 32A1 and the second engagement portion 32A2 are arranged at point-symmetric positions when the head 32A is viewed from above.

[0041] The first engagement portion 32A1 and the second engagement portion 32A2 each have a flat surface 32B and a sloped surface 32C. The flat surface 32B is a surface that comes into contact with the tool 50 when the tool 50 is rotated in a direction to tighten the second fastening member 32. The sloped surface 32C is a surface that displaces the tool 50 in a direction to come off the head 32A when the tool 50 is rotated in a direction to loosen the second fastening member 32. Here, the tool 50 may be the same tool as the tool used when attaching the first fastening member 22.

[0042] Therefore, when the tool 50 (here, a flat head screwdriver) is rotated in a direction to tighten the second fastening member 32 (here, clockwise), the tool 50 comes into contact with the flat surface 32B. Then, the rotational force (i.e., torque) from the tool 50 is transmitted to the second fastening member 32, and the second fastening member 32 is attached to the second fastening hole 30. On the other hand, when the tool 50 is rotated in a direction to loosen the second fastening member 32 (here, counterclockwise), the tool 50 moves along the inclined surface 32C. Therefore, the tool 50 moves in a direction to come off the head 32A (i.e., upward), and the second fastening member 32 cannot be loosened by the tool 50. In this way, the second fastening member 32 is attached to the second fastening hole 30 by a one-way method that engages with the tool only in the tightening direction.

[0043] As described above, the first fastening member 22 is fastened by a tool such as a flat head screwdriver through a cross hole provided in the head. The first fastening member 22 can also be loosened by a tool such as a flat head screwdriver through the cross hole. That is, the first fastening member 22 can be engaged with the same tool in both the tightening and loosening directions. On the other hand, the second fastening member 32 is a one-way type, and therefore can be engaged with the same tool in the tightening direction but cannot be engaged with the same tool in the loosening direction. In this way, the first fastening member 22 and the second fastening member 32 are attached by different methods.

[0044] Furthermore, to remove the second fastening member 32, it is necessary to prepare a tool different from the tool used to attach the second fastening member 32 (for example, a tool dedicated to removing the second fastening member 32). This makes it difficult to remove the second fastening member 32. As a result, by attaching the second fastening member 32 to the second fastening hole 30, disassembly of the case 12 is suppressed.

[0045] Next, the process of attaching the first fastening member 22 and the second fastening member 32 to the case 12 in this embodiment (hereinafter also simply referred to as the "attaching process") will be described with reference to Fig. 6. Fig. 6 shows an example of the attaching process in this embodiment. The attaching process is carried out as part of the manufacturing process of the magnetic tape cartridge 10. The attaching process shown in Fig. 6 is an example of a "magnetic tape cartridge manufacturing method" according to the technology of the present disclosure.

[0046] 6 as an example, first in step ST10, the first fastening hole 20 and the second fastening hole 30 are formed in the case 12 of the magnetic tape cartridge 10. After this, the mounting process proceeds to step ST12.

[0047] In step ST12, the first fastening members 22 are attached to the first fastening holes 20 in the magnetic tape cartridge 10. After this, the attachment process proceeds to step ST14.

[0048] In step ST14, it is selected whether or not the second fastening member 32 is to be attached to the second fastening hole 30. If it is not selected to attach the second fastening member 32 to the second fastening hole 30 in step ST14, the determination in step ST14 is negative, and the attachment process ends. If it is selected to attach the second fastening member 32 to the second fastening hole 30 in step ST14, the determination in step ST14 is positive, and the attachment process proceeds to step ST16.

[0049] In step ST16, the second fastening members 32 are attached to the second fastening holes 30 in the magnetic tape cartridge 10. After this, the attachment process ends.

[0050] As described above, in the magnetic tape cartridge 10 according to this embodiment, the magnetic tape MT is accommodated in the case 12. The case 12 also includes an upper case 14 and a lower case 16, and a space is formed inside by fastening the upper case 14 and the lower case 16 together. A first fastening hole 20 to which a first fastening member 22 is attached is formed in the lower surface 12E of the case 12. The first fastening member 22 fastens the upper case 14 and the lower case 16 together. Furthermore, a second fastening hole 30 to which a second fastening member 32 can be attached is formed in the lower surface 12E of the case 12. The second fastening member 32 fastens the upper case 14 and the lower case 16 together.

[0051] In this configuration, the second fastening hole 30 is formed to which the second fastening member 32 can be attached in a manner different from that of the first fastening member 22, so that the disassembly suppression effect can be selectively imparted according to the needs of the user. That is, when it is desired to improve the effect of suppressing disassembly of the case 12, the second fastening member 32 is attached to the second fastening hole 30. On the other hand, when the effect of suppressing disassembly of a general case 12 is sufficient, the second fastening hole 30 is not used. That is, the second fastening member 32 is not attached to the second fastening hole 30. In this way, the disassembly suppression effect can be selectively imparted according to the needs of the user.

[0052] In addition, by using the second fastening member 32, which has a different mounting method from the first fastening member 22, it becomes necessary to prepare two or more types of tools for disassembly. For example, in the case of a one-way screw, it becomes necessary to prepare a dedicated tool, not a driver for fastening a normal screw. This prevents disassembly of the case 12, thereby preventing tampering with the magnetic tape MT housed in the magnetic tape cartridge 10.

[0053] For example, the environments in which the magnetic tape cartridge 10 is used range from data centers, government offices, large companies, and other places with high interest in information security, to individuals or small and medium-sized enterprises, and other places with relatively low interest. Therefore, users have different awareness of the risk of the magnetic tape cartridge 10 being disassembled and tampered with. In this configuration, the method of attaching the second fastening member 32 to the second fastening hole 30 can suppress tampering of the magnetic tape cartridge 10, so that the information security function of the magnetic tape cartridge 10 can be provided according to the needs of the user. In other words, the security level can be changed by selecting the attachment of the second fastening member 32 at the manufacturing stage according to the needs of the user.

[0054] For example, the case 12 is assembled in advance by attaching the first fastening members 22 to the first fastening holes 20, and then in a later process (for example, an adjustment process before shipping), the second fastening members 32 are attached to the second fastening holes 30 according to the needs of the user. This makes it possible to selectively impart the effect of suppressing disassembly of the magnetic tape cartridge 10 according to the needs of the user, without reducing the productivity of the magnetic tape cartridge 10.

[0055] In addition, in the magnetic tape cartridge 10 according to this embodiment, a plurality of first fastening holes 20 are formed in the case 12. Furthermore, when the rectangular case 12 is viewed in plan, the first fastening holes 20 are provided at each of the four corners of the case 12. As a result, the upper case 14 and the lower case 16 are fastened to each other at the four corners of the case 12, ensuring the fastening strength of the case 12. In other words, from the viewpoint of the fastening strength of the case 12 of the magnetic tape cartridge 10, it is not necessarily necessary to use the second fastening member 32, and the use of the second fastening member 32 can be an option according to the needs of the user.

[0056] As described above, the magnetic tape MT is housed inside the magnetic tape cartridge 10 in a state where it is wound around the cartridge reel 18. That is, an object that is circular in plan view is housed inside the magnetic tape cartridge 10. Therefore, since there is a comparatively large space at the four corners of the case 12 of the magnetic tape cartridge 10, it becomes easy to arrange the first fastening holes 20.

[0057] In the magnetic tape cartridge 10 according to this embodiment, the second fastening hole 30 is provided in at least one of the positions corresponding to the four corners of the case 12. For example, the second fastening hole 30 is provided in a position corresponding to the left rear corner 13D of the case 12. As a result, like the first fastening hole 20, the second fastening hole 30 is provided in a position corresponding to the four corners of the case 12, making it easy to grasp the position of the second fastening hole 30 and simplifying the fastening operation.

[0058] In the magnetic tape cartridge 10 according to this embodiment, the second fastening hole 30 is provided at one of the positions corresponding to the four corners of the case 12. For example, the second fastening hole 30 is provided at a position corresponding to the rear left corner 13D of the case 12. This eliminates the need to provide unnecessary second fastening holes 30 while ensuring the effect of suppressing disassembly of the case 12, thereby improving the productivity of the magnetic tape cartridge 10.

[0059] In the magnetic tape cartridge 10 according to the present embodiment, the second fastening hole 30 is formed in the case 12 at a position spaced a predetermined distance L from the first fastening hole 20. For example, if the distance between the second fastening hole 30 and the first fastening hole 20 is smaller than the predetermined distance L, the second fastening hole 30 is closer to the first fastening hole 20, and the strength of the portion between the holes is reduced. In this configuration, the second fastening hole 30 is formed at a position spaced a predetermined distance L from the first fastening hole 20, and thus a reduction in the strength of the case 12 is suppressed.

[0060] In addition, when manufacturing the case 12 of the magnetic tape cartridge 10, it may be manufactured by injection molding using a mold. In this case, the mold is provided with a convex portion for molding the first fastening hole 20 and a convex portion for molding the second fastening hole 30. In this configuration, the second fastening hole 30 in the case 12 is designed to be located at a predetermined distance L away from the first fastening hole 20. That is, in the mold, the distance between the convex portion for molding the first fastening hole 20 and the convex portion for molding the second fastening hole 30 is also provided at a predetermined distance L away. If the convex portions of the mold are close to each other, the portion between the convex portions will be thinned due to the design of the mold. In this configuration, the second fastening hole 30 in the case 12 is designed to be located at a predetermined distance L away from the first fastening hole 20, so the distance between the convex portions of the mold is also secured, and the thickness between the convex portions of the mold is secured, which also contributes to improving the life.

[0061] In the magnetic tape cartridge 10 according to the present embodiment, the second fastening hole 30 is formed in the left rear corner 13D of the case 12, which is diagonally opposite to the right front corner 13A in which the cartridge memory 44 is stored. In the case 12, the left rear corner 13D, which is diagonally opposite to the right front corner 13A in which the cartridge memory 44 is stored, generally has more space than other corners, making it easier to arrange the second fastening hole 30. That is, the right front corner 13A houses the cartridge memory 44, and the right rear corner 13B has an opening 12B for removing the magnetic tape MT and a cover 19 for covering the opening 12B (see FIG. 2). And the left front corner 13C has a mechanism for suppressing overwriting of the magnetic tape MT. Therefore, the left rear corner 13D of the case 12 has more space than other corners, making it easier to arrange the second fastening hole 30.

[0062] Moreover, from the viewpoint of dimensional accuracy or manufacturing costs, the second fastening member 32 is generally made of metal. By arranging the metal second fastening member 32 at the corner diagonally opposite the right front corner 13A where the cartridge memory 44 is stored, it is possible to reduce the possibility that the second fastening member 32 will interfere with the magnetic field that penetrates the cartridge memory 44 for reading and writing.

[0063] Furthermore, in the magnetic tape cartridge 10 according to this embodiment, the second fastening member 32 is attached in a one-way manner, in which the second fastening member 32 engages with a tool only in the fastening direction, thereby improving the effect of preventing disassembly.

[0064] Furthermore, with the one-way method, even when automatic tightening is performed using an electric screwdriver, tightening can be performed with the same tool tip shape and torque as the first fastening member 22, thereby suppressing deterioration of the tool (e.g., damage to the tool tip).

[0065] In the above embodiment, the second fastening member 32 is a one-way fastening member, but the technology of the present disclosure is not limited to this. 2, the second fastening member 32 may be a fastening member having a Y-shaped drive hole 33A formed in the head 32A when the head 32A is viewed in plan. In this case, the second fastening member 32 can be tightened or loosened using a tool with a Y-shaped tip. In other words, when the first fastening member 22 is a general screw, it is necessary to prepare a driver for the first fastening member 22 and another tool for the second fastening member 32. Therefore, the second fastening member 32 has the effect of suppressing disassembly of the case 12.

[0066] As another example, in Fig. 7 2, the second fastening member 32 may be a fastening member in which a hexagonal drive hole 33B is formed in the head 32A when the head 32A is viewed in plan. In this case, the second fastening member 32 can be tightened or loosened using a tool with a hexagonal tip. In other words, when the first fastening member 22 is a general screw, it is necessary to prepare a driver for the first fastening member 22 and further prepare a separate tool for the second fastening member 32. Therefore, the second fastening member 32 has the effect of suppressing disassembly of the case 12.

[0067] (Modification) In the above embodiment, an example was described in which the second fastening member 32 is attached to the second fastening hole 30, but there are cases in which the second fastening member 32 is not attached depending on the user's needs regarding the confidentiality of the magnetic tape cartridge 10.

[0068] As an example, as shown in Fig. 8, one first fastening hole 20 is provided at each position corresponding to the four corners of the case 12. A first fastening member 22 is attached to each of the first fastening holes 20. A second fastening hole 30 is provided at a position corresponding to one of the four corners of the case 12. Here, a cap member 60 is attached to the second fastening hole 30. The cap member 60 is an example of a "cap member" according to the technology of the present disclosure.

[0069] The cap member 60 is a member capable of blocking the second fastening hole 30. In the example shown in Fig. 8, the cap member 60 is a cylindrical member and includes a body portion 61 that is inserted into the second fastening hole 30, and a head portion 62 provided at the upper end of the body portion 61. The head portion 62 is a disk-shaped portion having a shape larger than the inner diameter of the second fastening hole 30. The second fastening hole 30 is blocked by attaching the cap member 60 to the second fastening hole 30. The cap member 60 is made of, for example, resin.

[0070] As described above, in this modification, the cap members 60 are attached to the second fastening holes 30 to which the second fastening members 32 are not attached. This prevents foreign matter from entering the unused second fastening holes 30. For example, depending on the user's needs regarding the airtightness of the magnetic tape cartridge 10, even if the second fastening members 32 are not attached, it is possible to prevent foreign matter from entering the interior of the magnetic tape cartridge 10 through the second fastening holes 30.

[0071] In the above embodiment, an example in which the first fastening holes 20 are provided at positions corresponding to the four corners of the case 12 has been described, but the technology of the present disclosure is not limited to this. For example, two first fastening holes 20 may be provided at positions corresponding to the four corners of the case 12. The first fastening holes 20 may also be provided at positions other than the four corners of the case 12.

[0072] In the above embodiment, an example in which one second fastening hole 30 is provided at a position corresponding to one of the four corners of the case 12 has been described, but the technology of the present disclosure is not limited to this. For example, one second fastening hole 30 may be provided at a position corresponding to two or more of the four corners of the case 12. Also, for example, two second fastening holes 30 may be provided at positions corresponding to the corners of the case 12. Also, the second fastening hole 30 may be provided at a location other than the corner of the case 12.

[0073] In the above embodiment, the first fastening holes 20 are provided at positions corresponding to the four corners of the case 12, but the technology of the present disclosure is not limited to this. For example, the first fastening holes 20 may be provided at one, two, or three of the four corners of the case 12, and the second fastening holes 30 may be provided at the remaining corners.

[0074] In the above embodiment, the first fastening hole 20 and / or the second fastening hole 30 are provided on the lower surface 12E of the case 12, but the technology of the present disclosure is not limited thereto. For example, the first fastening hole 20 and / or the second fastening hole 30 may be provided on the upper surface 12D of the case 12.

[0075] The above description and illustrations are detailed descriptions of the parts related to the technology of the present disclosure, and are merely an example of the technology of the present disclosure. For example, the above description of the configuration, function, action, and effect is an example of the configuration, function, action, and effect of the parts related to the technology of the present disclosure. Therefore, it goes without saying that unnecessary parts may be deleted, new elements may be added, or replacements may be made to the above description and illustrations, within the scope of the gist of the technology of the present disclosure. In addition, in order to avoid confusion and to facilitate understanding of the parts related to the technology of the present disclosure, the above description and illustrations omit explanations of technical common sense that do not require explanation in order to enable the implementation of the technology of the present disclosure.

[0076] In this specification, "A and / or B" is synonymous with "at least one of A and B." In other words, "A and / or B" means that it may be only A, only B, or a combination of A and B. In addition, in this specification, the same idea as "A and / or B" is also applied when three or more things are expressed by connecting them with "and / or."

[0077] All publications, patent applications, and standards mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent application, or standard was specifically and individually indicated to be incorporated by reference.

[0078] The following is further disclosed regarding the above embodiment. <Appendix 1> A magnetic tape; A housing that forms a space capable of accommodating the magnetic tape therein by fastening a first case member and a second case member, a case having a first fastening hole to which a first fastening member that fastens the first case member and the second case member is attached, and a second fastening hole to which a second fastening member that is attached in a manner different from that of the first fastening member and that prevents disassembly of the housing by fastening the first case member and the second case member can be attached; A magnetic tape cartridge comprising: <Appendix 2> The first fastening hole is formed in a plurality of places, At least one of the first fastening holes is formed at each of the four corners of the housing. 2. A magnetic tape cartridge as described in claim 1. <Appendix 3> The second fastening hole is formed at least in one of the positions corresponding to the four corners of the housing. 10. A magnetic tape cartridge according to claim 1 or 2. <Appendix 4> The second fastening hole is formed at one of the positions corresponding to the four corners of the housing. 4. A magnetic tape cartridge according to any one of claims 1 to 3. <Appendix 5> The second fastening hole is formed at a predetermined distance from the first fastening hole. 5. A magnetic tape cartridge according to any one of claims 1 to 4. <Appendix 6> The second fastening hole is formed in a corner diagonally opposite to a corner where the non-contact communication medium is accommodated in the housing. 6. A magnetic tape cartridge according to any one of claims 1 to 5. <Appendix 7> The attachment method of the second fastening member is a one-way method that engages with the tool only in the fastening direction. 7. A magnetic tape cartridge according to any one of claims 1 to 6. <Appendix 8> A cap member is attached to the second fastening hole to which the second fastening member is not attached. 8. A magnetic tape cartridge according to any one of claims 1 to 7. <Appendix 9> A method for manufacturing a magnetic tape cartridge having a case that is a housing capable of accommodating a magnetic tape and that can form a space inside by fastening a first case member and a second case member, comprising: forming a first fastening hole to which a first fastening member for fastening the first case member and the second case member is attached; and forming a second fastening hole to which a second fastening member that prevents disassembly of the case by fastening the first case member and the second case member can be attached in a manner different from that of the first fastening member; A method for manufacturing a magnetic tape cartridge comprising: <Appendix 10> fastening the first case member and the second case member together by attaching the first fastening member to the first fastening hole; and Selecting whether or not to install the second fastening member in the second fastening hole; 10. A method for manufacturing a magnetic tape cartridge as described in claim 9, comprising: [Explanation of symbols]

[0079] 10 Magnetic Tape Cartridge 12 cases 12A Right wall 12B opening 12C front wall 12D top surface 12E Bottom side 13A Right front corner 13B Right rear corner 13C Front left corner 13D Left rear corner 14 Upper case 16 Lower case 18 Cartridge reel 18A reel hub 18B1 Top flange 18B2 Bottom flange 19 Cover 20 First fastening hole 22 First fastening member 30 Second fastening hole 32 Second fastening member 32A2 Second engaging part 32A1 First engaging part 32A Head 32B plane 32C Slope 33A, 33B Drive hole 44 Cartridge Memory 50 tools 60 Cap member 61 Main body 62 Head L distance MT magnetic tape

Claims

1. A magnetic tape; A housing that forms a space capable of accommodating the magnetic tape therein by fastening a first case member and a second case member, a case having a first fastening hole to which a first fastening member that fastens the first case member and the second case member is attached, and a second fastening hole to which a second fastening member that is attached in a manner different from that of the first fastening member and that prevents disassembly of the housing by fastening the first case member and the second case member can be attached; A magnetic tape cartridge comprising:

2. The first fastening hole is formed in plurality, At least one of the first fastening holes is formed at each of the four corners of the housing.

2. The magnetic tape cartridge of claim 1.

3. The second fastening hole is formed at least in one of the positions corresponding to the four corners of the housing.

3. The magnetic tape cartridge according to claim 2.

4. The second fastening hole is formed at one of the positions corresponding to the four corners of the housing.

3. The magnetic tape cartridge according to claim 2.

5. The second fastening hole is formed at a predetermined distance from the first fastening hole.

4. The magnetic tape cartridge according to claim 3.

6. The second fastening hole is formed in a corner diagonally opposite to a corner where the non-contact communication medium is accommodated in the housing.

4. The magnetic tape cartridge according to claim 3.

7. The second fastening member is attached in a one-way manner, engaging with a tool only in the fastening direction.

2. The magnetic tape cartridge of claim 1.

8. A cap member is attached to the second fastening hole to which the second fastening member is not attached.

2. The magnetic tape cartridge of claim 1.

9. 1. A method for manufacturing a magnetic tape cartridge, the magnetic tape cartridge having a case that is a housing capable of accommodating a magnetic tape, and that can form a space inside by fastening a first case member and a second case member, comprising: forming a first fastening hole to which a first fastening member for fastening the first case member and the second case member is attached; and forming a second fastening hole to which a second fastening member that prevents disassembly of the case by fastening the first case member and the second case member can be attached in a manner different from that of the first fastening member; A method for manufacturing a magnetic tape cartridge comprising:

10. fastening the first case member and the second case member together by attaching the first fastening member to the first fastening hole; and Selecting whether or not to install the second fastening member in the second fastening hole; 10. The method of claim 9, further comprising:

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