JP2007052860A - Reel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reel which is rust proof without using substances hazardous to human bodies. <P>SOLUTION: This reel 20 has a bottomed cylindrical hub 22 made of a resin material to wind a recording tape T, and flanges 24, 26 provided at the ends of the hub 22 to support the edges of the recording tape T in its width direction. The reel plate 46 is exposed from the bottom of the hub 22 to be attracted to the magnet of the drive mechanism, and is made of a stainless steel sensitive to magnetism but not plated for rust proofing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a reel on which a recording tape such as a magnetic tape used for storing data in a computer or the like is wound.

  Conventionally, in a recording tape cartridge used as an external recording medium such as a computer, a single reel around which a recording tape such as a magnetic tape is wound is rotatably accommodated. A reel gear that is exposed from the gear opening of the case and meshes with a drive gear formed on the rotary shaft on the drive device side is formed on the outer surface of the bottom of the reel.

  Further, inside the reel gear, a metal reel plate that is attracted to a magnet provided on a rotating shaft on the drive device side is provided in an exposed state by insert molding or the like (for example, a patent) Reference 1).

This reel plate is mainly composed of iron having magnetism so that it can be attracted by a magnet. However, since iron rusts with time, this reel plate is usually rust-proof plated. This prevents the occurrence of rust on the reel plate, but there is a problem that hexavalent chromium used in the rust-proof plating process is harmful to the human body.
JP 2000-48526 A

  In view of the above circumstances, an object of the present invention is to obtain a reel that can prevent rust without using a substance harmful to the human body.

  In order to achieve the above object, a reel according to claim 1 of the present invention is provided with a bottomed cylindrical hub formed of a resin material around which a recording tape is wound, and an end of the hub. The reel includes a flange that holds an end portion in the width direction of the recording tape, and the hub is provided with an annular member made of stainless steel that is not rust-proof plated.

  According to the first aspect of the present invention, since the annular member provided on the hub is made of stainless steel that is not rust-proof plated, the reel (annular member) can be rust-prevented without using a substance harmful to the human body. it can.

  The reel according to claim 2 is a reel plate according to claim 1, wherein the annular member is provided in an exposed state at the bottom of the hub and is attracted to a magnet on the drive device side, The reel plate is made of stainless steel having magnetism.

  According to the second aspect of the present invention, since the reel plate provided in an exposed state at the bottom of the hub is made of stainless steel having magnetism, it can be attracted by the magnet on the drive device side.

  According to a third aspect of the present invention, the reel according to the present invention is formed of a resin material and provided with a bottomed cylindrical hub around which the recording tape is wound, an end of the hub, and the width of the recording tape. A reel plate that has a flange that holds a directional end, and is provided with a non-rust-proof reel plate that is attracted to a magnet on the drive device side in a substantially unexposed state at the bottom of the hub. It is characterized by.

  According to the third aspect of the present invention, the reel plate that is attracted to the magnet on the drive device side is provided in a substantially unexposed state at the bottom of the hub, so that rust is generated even if it is not rust-proof plated. It becomes difficult. Accordingly, the reel can be rust-proof without using a substance harmful to the human body.

  According to a fourth aspect of the present invention, in the reel according to the third aspect, the reel plate is made of stainless steel having magnetism.

  According to the fourth aspect of the present invention, since the reel plate provided in a substantially unexposed state at the bottom of the hub is made of stainless steel having magnetism, it can be attracted by the magnet on the drive device side. Further, even if a part of the reel plate is exposed, rust does not occur on the reel plate. Therefore, it is possible to prevent the reel from being rusted.

  As described above, according to the present invention, it is possible to provide a reel capable of preventing rust without using a substance harmful to the human body.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention will be described below in detail based on examples shown in the drawings. The reel according to the present invention can be applied to either a single reel type housed in a case or a two reel type housed in a case as a pair. Here, a single reel type recording tape cartridge is used. Take an example and explain. For convenience of explanation, in FIG. 1, the loading direction of the recording tape cartridge 10 into the drive device is indicated by an arrow A, which is the front direction (front side) of the recording tape cartridge 10. The arrow B direction orthogonal to the arrow A is the right direction (right side).

  First, the overall configuration of the recording tape cartridge 10 will be briefly described. As shown in FIGS. 1 to 3, the recording tape cartridge 10 has a case 12 having a substantially rectangular box shape. In the case 12, an upper case 14 and a lower case 16 made of resin such as polycarbonate (PC) are respectively provided with a peripheral wall 14B standing on the periphery of the top plate 14A, and a peripheral wall 16B standing on the periphery of the bottom plate 16A. Are joined to each other by a screw 70 or the like. The means for joining the upper case 14 and the lower case 16 is not limited to this, and may be joined by, for example, ultrasonic welding.

  Inside the case 12, only one reel 20 is rotatably accommodated. The reel 20 includes a bottomed cylindrical reel hub 22 made of synthetic resin, and an upper flange 24 and a lower flange 26 provided at both ends of the reel hub 22, such as a magnetic tape as an information recording / reproducing medium. The recording tape T is wound around the outer peripheral surface of the reel hub 22. The end of the recording tape T in the width direction is held by the upper flange 24 and the lower flange 26. Details of the reel 20 will be described later.

  An opening 18 for pulling out the recording tape T wound around the reel 20 is formed in the right wall 12B of the case 12, and a drive tape is drawn from the opening 18 at the free end of the recording tape T. A leader pin 30 that is pulled out while being locked (engaged) by a drawing member (not shown) of the apparatus is fixed.

  An annular groove 32 is formed at both ends of the leader pin 30 projecting from the widthwise end of the recording tape T, and the annular groove 32 is locked to a hook or the like of the drawing member. Thereby, when the recording tape T is pulled out, the hook or the like does not come into contact with the recording tape T to be damaged.

  Further, a pair of upper and lower pin holding portions 36 for positioning and holding the leader pin 30 in the case 12 on the inner side of the opening 18 of the case 12, that is, on the inner surface of the top plate 14 A of the upper case 14 and the inner surface of the bottom plate 16 A of the lower case 16. Is provided. The pin holding portion 36 has a substantially semicircular shape with the drawing tape T drawn side open, and both end portions 34 of the leader pin 30 in an upright state can enter and leave the pin holding portion 36 from the open side. Has been.

  In addition, a leaf spring 38 is fixedly disposed in the vicinity of the pin holding portion 36, and the bifurcated tip portion of the leaf spring 38 is engaged with the upper and lower end portions 34 of the leader pin 30. The leader pin 30 is held by the pin holding portion 36. When the leader pin 30 enters and exits the pin holding portion 36, the tip of the leaf spring 38 is appropriately elastically deformed to allow the leader pin 30 to move.

  A gear opening 40 for exposing a reel gear 44 (described later) of the reel 20 to the outside is provided at the center of the lower case 16, and the reel gear 44 of the reel 20 is a drive gear (not shown) of the drive device. And is rotationally driven in the case 12. The reel 20 is partially protruded from the inner surfaces of the upper case 14 and the lower case 16 so that the reel 20 is not rattled by the floating regulation wall 42 as an inner wall on a circular locus coaxial with the gear opening 40. Is held in.

  The opening 18 is opened and closed by a door 50. The door 50 is formed in a rectangular plate size capable of closing the opening 18, and the door 50 is provided on the top plate 14 </ b> A and the bottom plate 16 </ b> A inside the opening 18 so that the door 50 can move along the right wall 12 </ b> B of the case 12. A groove portion 64 is formed to slidably fit the upper and lower end portions thereof.

  A shaft 52 projects from the center of the rear end of the door 50, and a coil spring 58 is fitted into the shaft 52. An enlarged portion 54 that prevents the coil spring 58 from falling off is formed at the rear end of the shaft 52. Further, the lower case 16 is provided with a support base 60 having a locking projection 62 for locking the rear end of the coil spring 58 fitted on the shaft 52.

  Accordingly, the door 50 is supported by the urging force of the coil spring 58 when the shaft 52 is slidably supported on the support base 60 and the rear end of the coil spring 58 is locked by the locking protrusion 62. In this configuration, the opening 18 is always urged in the closing direction. When the opening 18 is opened, it is preferable that a support base 66 that supports the shaft 52 is further protruded on the rear side of the support base 60.

  Further, a projection 56 for opening / closing operation projects outwardly from the front end of the door 50. The projection 56 engages with an opening / closing member (not shown) of the drive device as the recording tape cartridge 10 is loaded into the drive device from the front wall 12A side. Is configured to be opened against the urging force of the coil spring 58.

  As shown in FIG. 3, the bottom plate 16A of the lower case 16 is formed with positioning non-through holes 48 and 49 into which positioning members (not shown) of the drive device are inserted. The hole 48 on the right wall 12B side is formed in a substantially square shape when viewed from the bottom, and the hole 49 on the left wall 12C side is formed in a substantially elliptical shape when viewed from the bottom in the left-right direction. Further, on the rear wall 12D side of the bottom plate 16A, an opening 68 having a substantially elliptical shape in a bottom view from which a part of a write protect (not shown) is exposed is formed.

  Further, the upper case 14 is formed with a plurality of screw bosses 74 (four in the drawing) formed as non-through holes at predetermined positions (near the corner of the upper case 14). When the upper case 14 and the lower case 16 are overlapped with each other, a plurality of screw bosses 76 formed as through-holes are arranged at predetermined positions (the lower case 16 can be brought into contact with the screw boss 74). Near the corner). Accordingly, when the upper case 14 and the lower case 16 are overlapped, the screw bosses 74 and 76 come into contact with each other, and in this state, the screw 70 is screwed from the lower surface side of the bottom plate 16A.

  Next, the reel 20 according to the present invention in the recording tape cartridge 10 configured as described above will be described in detail. As shown in FIG. 4, in the reel 20, a bottomed cylindrical reel hub 22 constituting an axial center portion and a lower flange 26 provided at an end portion on the bottom wall 28 side are integrally formed of a resin material. The upper flange 24 is constituted by ultrasonic welding at the opening 27 side end of the reel hub 22.

  Therefore, the reel hub 22 and the upper flange 24 are formed using resin materials that are compatible with each other, whereby the reel hub 22 and the upper flange 24 can be easily ultrasonically welded. Examples of the resin material include polymethyl methacrylate (PMMA) and acrylonitrile / butadiene / styrene (ABS), acrylonitrile / styrene (AS), acrylonitrile / butadiene / styrene (ABS), and polycarbonate (PC). A combination of polycarbonate (PC) and the like can be given.

  An annular reel gear 44 is formed on the lower surface side of the bottom wall 28. The reel gear 44 is exposed from a circular gear opening 40 provided in the center of the lower case 16, and meshes with a drive gear (not shown) provided on a rotation shaft (not shown) of the drive device to be attached to the reel 20. It is designed to transmit rotational force.

  In addition, a metal reel plate 46 as an annular member is integrally provided inside the reel gear 44 by insert molding, and is exposed from the lower surface of the bottom wall 28. The reel plate 46 is attracted to a magnet (not shown) provided on the rotating shaft of the drive device, so that the shaft misalignment is prevented and the meshing state of the reel gear 44 and the drive gear can be maintained.

  Here, the reel plate 46 is made of stainless steel having magnetism that is not rust-proof plated. The stainless steel having magnetism is SUS410 or SUS430 in JIS notation. Therefore, it is possible to prevent rust from being generated on the reel plate 46 without using a harmful substance such as hexavalent chromium used for rust-proof plating. That is, rust prevention can be achieved in the reel 20.

  Further, even if the reel plate 46 is not rust-proof plated, rust prevention can be achieved if the reel plate 46 is embedded in the bottom wall 28 so as to be substantially unexposed. That is, as shown in FIG. 7, in the mold 80, the reel plate 46 is supported from below by a plurality (at least three) of cylindrical protrusions 82, and in this state, resin is poured from the gate 78 and the reel hub 22 and The lower flange 26 is integrally formed.

  Thereby, as shown in FIG. 5, the reel hub 22 and the lower flange 26 in which the reel plate 46 is embedded are formed. At the time of molding, the reel plate 46 is supported by a plurality of (at least three) convex portions 82 in the mold 80, so that the lower surface of the bottom wall 28 has the reel plate 46 as shown in FIG. A plurality of (for example, six) small holes 72 that expose a part of the reel plate 46 are formed, but most of the reel plate 46 is embedded in the bottom wall 28 (substantially unexposed). Therefore, rust is hardly generated on the reel plate 46.

  Furthermore, if the reel plate 46 is made of stainless steel (SUS410 or SUS430) having magnetism as described above, even if a part of the reel plate 46 is exposed from the bottom wall 28 of the reel hub 22, the reel plate 46 46 is preferable because rust does not occur (generation of rust can be reliably prevented).

  As described above, if the reel plate 46 is made of stainless steel having magnetism that is not rust-proof plated, or is embedded in the bottom wall 28 of the reel hub 22 so as to be substantially unexposed, the reel It is possible to prevent the rust of the plate 46 from occurring over time. That is, the rust prevention of the reel 20 (reel plate 46) can be achieved without using a substance harmful to the human body such as hexavalent chrome used for rust prevention plating.

  In the above embodiment, the reel hub 22 and the lower flange 26 are integrally formed and the upper flange 24 is welded to the reel hub 22. However, the reel hub 22 and the upper flange 24 are integrally formed, and the lower flange is formed. The same applies to a reel that welds 26 to the reel hub 22 and a reel that welds both the upper flange 24 and the lower flange 26 to the reel hub 22. That is, the reel 20 according to the present invention is not limited to the illustrated one.

  For example, as shown in FIG. 8, a metal annular member 84 is attached to the inner peripheral surface of the reel hub 22 for reinforcement of the reel hub 22 (for prevention of falling due to the recording tape T being wound). However, the annular member 84 may be stainless steel that is not rust-proofed. Thus, if the metal parts provided on the reel 20 are made of stainless steel that is not rust-proof plated, it is preferable because the reel 20 can be rust-proof without using a substance harmful to the human body. In some cases, the annular member 84 is provided so as to be embedded in the reel hub 22. In this case, it is preferable that the annular member 84 is made of stainless steel that is not rust-proof plated.

1 is a schematic perspective view of a recording tape cartridge including a reel according to the present invention. 1 is a schematic exploded perspective view of a recording tape cartridge provided with a reel according to the present invention as viewed from above. 1 is a schematic exploded perspective view of a recording tape cartridge provided with a reel according to the present invention when viewed from below. Schematic sectional view of a reel according to the present invention Schematic sectional view of a reel according to the present invention Schematic bottom view of a reel according to the present invention Schematic sectional view showing a mold for molding a reel according to the present invention Schematic cross-sectional view of a reel provided with an annular member for reinforcing a reel hub

Explanation of symbols

10 Recording Tape Cartridge 12 Case 20 Reel 22 Reel Hub 24 Upper Flange 26 Lower Flange 28 Bottom Wall (Bottom)
30 Leader pin 46 Reel plate (annular member)
84 Ring member

Claims (4)

A bottomed cylindrical hub formed of a resin material and wound with a recording tape;
A flange provided at an end of the hub, and holding a widthwise end of the recording tape;
A reel with
A reel having a stainless steel annular member that is not rust-proof plated on the hub.   The annular member is a reel plate provided in an exposed state at the bottom of the hub and attracted to a magnet on a drive device side, and the reel plate is stainless steel having magnetism. Reel described in. A bottomed cylindrical hub formed of a resin material and wound with a recording tape;
A flange provided at an end of the hub, and holding a widthwise end of the recording tape;
A reel with
A reel comprising a reel plate that is attracted to a magnet on a drive device side and that is not rust-proof plated is provided in a substantially unexposed state at the bottom of the hub.   The reel according to claim 3, wherein the reel plate is made of stainless steel having magnetism.

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