JP4369879B2 - Recording tape cartridge - Google Patents

Description

The present invention relates to a recording tape cartridge which rotatably accommodates the reel recording tape such as a magnetic tape is wound.

  Conventionally, a recording tape in which a recording tape such as a magnetic tape used as a data recording / reproducing medium of a computer or the like is wound around a single reel and the reel is rotatably accommodated in a case made of a synthetic resin. Cartridges are known. The reel of this recording tape cartridge can be rotated in the case when it is used (when loaded in the drive device), but cannot be rotated in the case when not used (when not loaded in the drive device). It is locked to become.

  That is, this recording tape cartridge is provided with a brake means for preventing the reel from rotating in the case when not in use. As the brake means, for example, a configuration in which a brake member that cannot be rotated with respect to the case is engaged with a reel is conceivable.

  For example, as shown in FIG. 24, the brake member 130 is formed in a disc shape that is accommodated in a reel hub 112 having a bottomed cylindrical shape of the reel 110 so as to be movable up and down, and is substantially “U” in plan view on the upper surface thereof. A pair of engaging protrusions 134 having a letter shape are erected. Then, a pair of rotation restricting ribs 126 suspended from the inner surface of the upper case 122 are inserted into the engagement protrusions 134 so that the brake member 130 cannot rotate with respect to the case 120.

  Further, the brake member 130 is constantly urged toward the bottom wall 114 of the reel hub 112 by an urging means such as a compression coil spring 116, and an annular braking gear 132 formed on the lower surface of the brake member 130 is urged to the reel hub. 112 is engaged with an annular engagement gear 118 formed on the upper surface of the bottom wall 114 of the base 112. Thereby, inadvertent rotation of the reel 110 is prevented.

In addition, a substantially cylindrical operation protrusion 136 protrudes from the lower surface axial center portion of the brake member 130, and the operation protrusion 136 penetrates the axial center portion of the bottom wall 114 of the reel hub 112. It is inserted into the hole 114 </ b> A and faces a gear opening 128 provided at a substantially central portion of the lower case 124. Therefore, when the reel 110 can be rotated, the operation protrusion 136 (brake member 130) is pushed upward to release the engagement of the brake gear 132 with the engagement gear 118 (see, for example, Patent Document 1). ).
US Pat. No. 6,452,747

  However, in such a configuration, when the recording tape cartridge is not used, the reel 110 can be raised against the urging force of the urging means such as the compression coil spring 116 (movable in the axial direction of the reel 110). Therefore, when an impact is applied to the recording tape cartridge by dropping or the like and the bottom wall 114 of the reel hub 112 moves upward, as shown in the drawing, the peripheral edge of the through hole 114A is tilted with the brake member 130 tilted. There were times when it was locked by the part and fell.

  When loaded in the drive device in such a state, there are problems that not only recording / reproduction but also damage to the recording tape cartridge and failure of the drive device are caused. Further, since the reel can be rotated when not in use, there is a problem in that the recording tape is wrinkled or cut off.

  In view of the above facts, an object of the present invention is to obtain a recording tape cartridge that restricts movement of a brake member and restricts movement of the reel while the reel is not rotatable.

  According to the first aspect of the present invention, in the recording tape cartridge, an engaging portion that is rotatably accommodated in a case and formed on a bottom wall of a hub of a reel around which the recording tape is wound, and the engaging portion It faces and is movably provided along the axial direction of the hub, engages with the engaging portion to restrict the rotation of the reel, releases the engaged state with the engaging portion, and rotates the reel. The brake member to be allowed, the component mounting portion formed on the case, and the component mounting portion are mounted to be movable in the radial direction of the reel, and are interposed between the reel and the case in the axial direction of the reel. A lock member that restricts the movement, is pushed by the braking member and is allowed to move away from the reel, and biases the lock member in a radial direction of the reel, and is interposed between the reel and the case. Attaching to regulate the axial movement of the reel It is characterized in that it has means, and a concave-convex portion provided on the sliding surfaces of the locking member and the case.

  In the first aspect of the present invention, the reel around which the recording tape is wound is rotatably accommodated in the case, and the engaging portion is formed on the bottom wall of the hub of the reel. A braking member is provided so as to face the engaging portion, and is movable along the axial direction of the hub. The braking member engages with the engaging portion to restrict the rotation of the reel, releases the engaged state with the engaging portion, and allows the reel to rotate.

  On the other hand, the case is provided with a component mounting portion, and a lock member is attached to the component mounting portion so as to be movable in the radial direction of the reel. The lock member is interposed between the reel and the case to restrict the movement of the reel in the axial direction, and is pushed by the braking member to allow the reel to move away from the reel. Further, an urging means is disposed in the component mounting portion, and the lock member is urged in the radial direction of the reel so as to be interposed between the reel and the case to restrict the movement of the reel in the axial direction.

  As described above, when the recording tape cartridge is not used, since the braking member and the engaging portion are in an engaged state, a recording member is provided by restricting the movement of the reel in the axial direction in this state. The reel does not move when the tape cartridge is not used. Further, when the recording tape cartridge is dropped, the problem that the flange provided on the reel is damaged due to the reel moving in the case is also improved.

  Also, when the biasing means is disposed on the outer wall side of the case and the lock member is biased from the outer wall side of the case, on the outer wall side of the case, a rib for housing the reel or a rib for reinforcing the case It is difficult to secure the space, but for example, the space is easily secured by arranging the biasing means at the center of the case and biasing the lock member from the center of the case. And the biasing means can be made compact. Moreover, the central part of the case can be used effectively.

  Furthermore, by providing an uneven portion on the sliding surface between the lock member and the case, the sliding area between the lock member and the case can be reduced. Thereby, sliding resistance when a lock member slides on a case can be reduced, and movement of a lock member can be made smooth.

According to a second aspect of the present invention, in the recording tape cartridge, an engaging portion that is rotatably accommodated in a case and formed on a bottom wall of a hub of a reel around which the recording tape is wound, and the engaging portion It faces and is movably provided along the axial direction of the hub, engages with the engaging portion to restrict the rotation of the reel, releases the engaged state with the engaging portion, and rotates the reel. The brake member to be allowed, the component mounting portion formed on the case, and the component mounting portion are mounted to be movable in the radial direction of the reel, and are interposed between the reel and the case in the axial direction of the reel. A lock member that restricts movement and is pushed by the braking member to allow the reel to move, and biases the lock member outward in the radial direction of the reel, and is interposed between the reel and the case To restrict the movement of the reel in the axial direction. Includes a biasing means that, the said locking member, wherein the brake member is contacting, the axial movement of the braking member is pressed against the said braking member is converted into radial movement of the reel, A cam portion that moves the lock member inward in the radial direction against the biasing force of the biasing means, and is extended inward in the radial direction of the reel from the cam portion, and is pressed by the pressing force of the braking member And a stabilizing portion that generates a rotation moment that resists the rotation moment acting on the lock member by contacting the case .

According to the second aspect of the present invention, the lock member is provided with a cam portion with which the braking member abuts, and when the cam portion is pressed against the braking member, the axial movement of the braking member is changed in the radial direction of the reel. The lock member is moved inward in the radial direction against the urging force of the urging means. In addition, the locking member is provided with a stabilizing portion that protrudes inward in the radial direction of the reel from the cam portion, and resists the rotational moment acting on the locking member by the pressing force of the braking member by contacting the case. The rotation moment is generated.

  Thereby, the force which always urges the lock member to the case side can be given, the inclination of the lock member can be prevented, and the lock member can be prevented from leaving the case.

  According to a third aspect of the present invention, in the recording tape cartridge according to the first or second aspect, the urging means includes a base fixed to the center of the component mounting portion, and a leg piece extending radially from the base. It is characterized by being a leaf spring formed by.

  In the third aspect of the present invention, the biasing means is a leaf spring composed of a base and a leg piece, the base is fixed at the center of the component mounting portion, and the leg piece is spread radially from the base. As a result, a single leaf spring is sufficient regardless of the number of locking members.

  For this reason, at the time of assembling, it is only necessary to assemble one leaf spring regardless of the number of locking members, so that the assembling becomes easy and the workability is improved. In addition, for example, by forming the leg piece so as to be bent from the base portion to the distal end portion, the vertical direction of the leaf spring becomes clear, so there is no fear that the leaf spring is assembled upside down.

  According to a fourth aspect of the present invention, in the recording tape cartridge according to the third aspect, the leg piece abuts and a component force of the force pressing the lock member against the case side is obtained by the urging force of the leaf spring. An inclined surface is formed on the lock member.

  In the invention according to claim 4, the lock member is provided with an inclined surface with which the leg piece abuts, a leaf spring is brought into contact with the inclined surface, and the component force of pressing the lock member against the case side by the urging force of the leaf spring By obtaining the above, it is possible to prevent the lock member from being separated from the case.

  According to a fifth aspect of the present invention, in the recording tape cartridge, an engaging portion that is rotatably accommodated in a case and is formed on a bottom wall of a hub of a reel around which the recording tape is wound, and the engaging portion It faces and is movably provided along the axial direction of the hub, engages with the engaging portion to restrict the rotation of the reel, releases the engaged state with the engaging portion, and rotates the reel. The brake member to be allowed, the component mounting portion formed on the case, and the component mounting portion are mounted to be movable in the radial direction of the reel, and are interposed between the reel and the case in the axial direction of the reel. A lock member that restricts the movement, is pushed by the braking member and is allowed to move away from the reel, and biases the lock member in a radial direction of the reel, and is interposed between the reel and the case. Attaching to regulate the axial movement of the reel And means, wherein the biasing means, wherein said base portion is fixed to the center of the component mounting portion, and a leg extending radially from said base, is in the leaf spring which is formed.

  In the invention described in claim 5, the same effect as that of the invention described in claim 3 can be obtained.

  According to a sixth aspect of the present invention, in the recording tape cartridge, an engaging portion that is rotatably accommodated in a case and formed on a bottom wall of a hub of a reel around which the recording tape is wound, and the engaging portion It faces and is movably provided along the axial direction of the hub, engages with the engaging portion to restrict the rotation of the reel, releases the engaged state with the engaging portion, and rotates the reel. The brake member to be allowed, the component mounting portion formed on the case, and the component mounting portion are mounted to be movable in the radial direction of the reel, and are interposed between the reel and the case in the axial direction of the reel. A lock member that restricts the movement, is pushed by the braking member and is allowed to move away from the reel, and biases the lock member in a radial direction of the reel, and is interposed between the reel and the case. Attaching to regulate the axial movement of the reel And the biasing means is a leaf spring, the leaf spring abuts, and an inclined surface for obtaining a component force of the force pressing the lock member against the case side by the biasing force of the leaf spring is provided. The lock member is formed.

  In the invention described in claim 6, the same effect as that of the invention described in claim 4 can be obtained.

  Since the present invention is configured as described above, in the first aspect of the present invention, when the recording tape cartridge is not used, the brake member and the engaging portion are engaged. By providing a lock member that restricts axial movement, the reel does not move when the recording tape cartridge is not in use. Further, when the recording tape cartridge is dropped, the problem that the flange provided on the reel is damaged due to the reel moving in the case is also improved. Furthermore, since the sliding area between the lock member and the case can be reduced, the sliding resistance when the lock member slides on the case can be reduced, and the lock member can be moved smoothly. .

  According to the second aspect of the present invention, it is possible to apply a force for constantly urging the lock member toward the case side, and it is possible to prevent the lock member from being inclined and prevent the lock member from being separated from the case.

In the inventions according to claims 3 and 5 , since it is only necessary to assemble one leaf spring regardless of the number of locking members, the assembling becomes easy and workability is improved. In the invention according to claims 4 and 6, the lock member can be prevented from being separated from the case.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail based on examples shown in the drawings. For convenience of explanation, the loading direction of the recording tape cartridge into the drive device is indicated by an arrow A, which is the forward direction. Moreover, the arrow B is set to the left direction, and the front / rear, left / right, and upper / lower directions are expressed based on the arrow B. In the following, the “radial direction” refers to a direction parallel to a direction radially outward from the axial center line of the reel accommodated in the case.

  As shown in FIG. 1 and FIG. 2 (FIG. 2 is an exploded perspective view of the recording tape cartridge 10 upside down), the recording tape cartridge 10 has a case 12 having a substantially rectangular box shape. is doing. In this case 12, an upper case 14 and a lower case 16 made of a resin such as PC are connected to a peripheral wall 14B erected on the periphery of the top plate 14A and a peripheral wall 16B erected on the periphery of the bottom plate 16A. In the contacted state, they are joined by ultrasonic welding, screwing or the like.

  Only one reel 40 is rotatably accommodated in the case 12. As shown in FIGS. 2 to 4, the reel 40 is formed by integrally forming a bottomed cylindrical reel hub 42 constituting an axial center portion and an upper flange 44 provided at an upper end portion of the reel 40. The reel hub 42 is configured to be ultrasonically welded to the lower end portion. A recording tape T such as a magnetic tape as an information recording / reproducing medium is wound around the outer peripheral surface of the reel hub 42, and an end in the width direction of the wound recording tape T by the upper flange 44 and the lower flange 46. Part is held.

  As shown in FIG. 1, an opening 20 is formed in the vicinity of the left front corner portion 12C of the recording tape cartridge 10 so that the recording tape T wound around the reel 40 can be pulled out. That is, an opening 20 is formed across the front wall 12A and the left side wall 12B adjacent to the corner portion 12C, and the leader 20 is fixed to the end of the recording tape T from the opening 20 and arranged along the left side wall 12B. The tape 22 is pulled out.

  In addition, the corner part said here points out the ridgeline part which cross | intersects substantially right angle or an obtuse angle in planar view in the surrounding walls 14B and 16B of the substantially rectangular box-shaped case 12. FIG. Therefore, the corner portion 12C refers to a ridge line portion where the front wall 12A and the left side wall 12B intersect at substantially right angles in a plan view.

  The leader tape 22 is a drawn member with which a drawing member (not shown) of the drive device is engaged in order to pull out the recording tape T, and a hole 22A for engaging the drawing member is formed near the tip of the leader tape 22. Yes. Overhanging portions 22B projecting in the vertical direction are formed on both the upper and lower sides slightly closer to the rear than the tip of the hole 22A. The overhanging portion 22 </ b> B is housed (inserted) in housing recesses 24 formed on the inner surface of the upper case 14 and the inner surface of the lower case 16, whereby the leader tape 22 is held in the case 12.

  The opening 20 is closed by the door 30 when the recording tape cartridge 10 is not used. The door 30 is formed in a substantially “L” shape in plan view having substantially the same shape and size as the opening 20. The door 30 is preferably formed of an olefin resin such as POM, but may be formed of a resin such as PC or a metal such as SUS.

  Further, a support shaft 26 serving as a pivotal support point for the door 30 is provided on the front wall 12 </ b> A side of the upper case 14 and the lower case 16. The support shaft 26 has a cylindrical boss 26A on the upper case 14 side and a columnar boss 26B on the lower case 16 side. The tip (upper end) of the boss 26B on the lower case 16 side is fitted into the boss 26A on the upper case 14 side, whereby the support shaft 26 is configured. Therefore, the diameter of the boss 26B is slightly smaller than the diameter of the boss 26A.

  Further, in the vicinity of the right end portion of the inner surface of the door 30 (a position shifted to the left by a predetermined distance from the right end portion), three flat plate-like rotational sliding portions 32 are provided in parallel. The rotary sliding portion 32 protrudes from both upper and lower end portions of the inner surface of the door 30 and a midway portion slightly shifted downward from the center. The rotary sliding portion 32 is loosely fitted to the support shaft 26. A through hole is formed. Therefore, the door 30 is rotatably supported by inserting the support shaft 26 into each through hole.

  In addition, annular convex portions 34 are formed around the through holes on the upper surface of the rotational sliding portion 32 at the upper end and the lower surface of the rotational sliding portion 32 at the lower end, respectively. And this annular convex part 34 contacts the upper case 14 and the lower case 16, respectively, between the upper end surface 30A of the door 30 and the upper case 14, and between the lower end surface 30B of the door 30 and the lower case 16. A gap of about 0.3 mm to 0.5 mm is formed between them.

  Further, on the inner surface of the door 30 between the rotating and sliding portions 32, a raised portion 36 having an arc shape in a plan view along the peripheral surface of the support shaft 26 is formed.

  Further, a winding portion 28 </ b> A of a torsion spring 28 that constantly biases the door 30 in the closing direction of the opening 20 is inserted into the support shaft 26. That is, the winding portion 28A of the torsion spring 28 is inserted into the boss 26B having a smaller diameter while being held between the rotary sliding portion 32 at the lower end and the rotary sliding portion 32 at the midway portion. Attached. One end side of the torsion spring 28 is locked to the screw boss 38 of the case 12 (the screw boss projecting from the lower case 16), and the other end side is the right edge of the raised portion 36. It is locked to.

  On the other hand, the reel 40 is formed of a resin material. As described above, the bottomed cylindrical reel hub 42, the upper flange 44 integrally extended to the upper end portion of the reel hub 42, and the lower end portion of the reel hub 42 are welded. And a lower flange 46 attached thereto. Therefore, the reel hub 42 and the lower flange 46 are formed using resin materials that are compatible with each other, and can be easily welded by ultrasonic waves or the like.

  As shown in FIGS. 2 to 4, a bottom wall 48 is provided on the lower flange 46 side of the reel hub 42, and a through hole 48 </ b> A is formed in the axial center portion of the bottom wall 48. A reel gear 50 is formed in an annular shape on the lower surface side of the bottom wall 48, and the reel 40 is pressed against the lower case 16 side by a biasing force of a compression coil spring 78 described later.

  In this state, the reel gear 50 can be exposed from a circular gear opening 18 provided substantially at the center of the lower case 16, and meshes with the drive gear 102 provided on the rotary shaft 100 on the drive device side, so that the reel Rotational power is transmitted to 40.

  Further, an annular reel plate 52 made of a magnetic material is integrally fixed to the inner side in the radial direction of the reel gear 50 by insert molding or the like. The reel plate 52 is attracted by the magnetic force of an annular magnet 106 provided between the drive gear 102 and a release projection 104 described later in a state where the drive gear 102 and the reel gear 50 are completely meshed with each other. An axial shift with the rotating shaft 100 is prevented, and the meshing state of the reel gear 50 and the drive gear 102 can be maintained. With such a configuration, when the rotary shaft 100 rotates about its axis, the reel 40 rotates in the case 12 integrally therewith.

  On the other hand, an engagement gear 54 is formed in an annular shape on the upper surface side of the bottom wall 48 of the reel hub 42, and can engage with the braking gear 82 of the brake member 80. As shown in FIGS. 4 and 5, the brake member 80 is formed in a disc shape that is accommodated in the reel hub 42 so as to be movable up and down, and a brake gear 82 is annularly provided on the outer periphery of the lower surface of the brake member 80. Is provided.

  A plurality (three in this embodiment) of plate-shaped guide portions 84 and a plurality (three in the present embodiment) of substantially prismatic engagement protrusions 86 are erected on the upper surface of the brake member 80. The engagement protrusion 86 is formed with a contact surface 86A having a radially inner side inclined at a predetermined angle (for example, 45 degrees).

  Further, on the upper surface of the brake member 80, a flat surface 80 </ b> A is formed in an annular shape outside the guide portion 84 and the engagement protrusion 86. Further, a substantially cylindrical operation protrusion 88 that can be inserted into the through hole 48A is projected at the center of the lower surface of the brake member 80, and a release protrusion that is projected from the axial center of the rotary shaft 100 on the drive device side. 104 (see FIGS. 3 and 4).

  Here, as shown in FIGS. 4 and 5, a component mounting portion 55 is provided at the approximate center of the inner surface of the top plate 14 </ b> A of the upper case 14. Three arc walls 62 are intermittently provided at equal intervals in the component mounting portion 55, and an arc wall 64 having a height lower than the arc wall 62 is provided inside the arc wall 62. It is provided in the state which faced. A pair of guide wall portions 68 are connected to the circular arc wall 62 inside the central portion of the circular arc wall 64. The guide wall portion 68 protrudes higher than the arc wall 62, and has a size such that a plate-like guide portion 84 formed on the upper surface of the brake member 80 can be inserted.

  A plurality of support ribs 66 (described later) are radiated between the arc wall 62 and the arc wall 64 to reinforce the arc wall 62 and the arc wall 64. Further, the gap between the adjacent arc walls 62 is substantially the same as the gap between the adjacent arc walls 64, and the receiving portion 60 is configured by the gap, and the lock member 90 is slidably received.

  Here, as shown in FIGS. 6 and 7, the lock member 90 includes a rectangular parallelepiped main body 92, and the back surface of the main body 92 (sliding surface with the top plate 14 </ b> A of the upper case 14) A pair of recesses 92 </ b> C extending along the longitudinal direction of the main body 92 is provided. Further, the surface of the main body 92 (the surface opposite to the sliding surface with the top plate 14A of the upper case 14) protrudes with the cam portion 94 and the engaging wall 96 having a substantially trapezoidal cross section facing each other. Has been established.

  An inclined surface 94B is formed on the outer surface of the cam portion 94, and is inclined slightly toward the inside by an angle θ as it goes to the distal end side of the cam portion 94 (see FIG. 10). Further, a contact surface 94A on which the contact surface 86A of the substantially prismatic engagement protrusion 86 formed on the upper surface of the brake member 80 can be contacted is provided on the inner surface front end side of the cam portion 94 (see FIG. 11 (B)). The contact surface 94A is inclined at a predetermined angle, and the height decreases as the distance from the inclined surface 94B side of the cam portion 94 increases.

  On the other hand, the engagement wall 96 is lower than the height of the cam portion 94, and the cam portion 94 and the engagement wall 96 are separated from each other by at least the separation distance between the arc wall 62 and the arc wall 64. Further, between the cam portion 94 and the engagement wall 96, a projecting portion 92D lower than the height of the support rib 66 in a state where the lock member 90 is accommodated in the accommodating portion 60 is spanned. The cam portion 94 and the engagement wall 96 are reinforced by the installation portion 92D.

  Further, an abutting surface 96A inclined at a predetermined angle is formed on the distal end side of the outer surface of the engagement wall 96, and the height decreases as the distance from the inner surface of the engagement wall 96 increases. The shape of the outer surface including the contact surface 96A is a circular arc surface that matches the inner peripheral surface of the reel hub 42 in plan view (described later).

  Further, a step portion 96B projects from the main body portion 92 to the outer surface base portion of the engagement wall 96, and the thickness of the step portion 96B is within the case 12, as shown in FIG. Is substantially the same as the gap between the upper surface of the upper flange 44 and the inner surface of the top plate 14 </ b> A in a state where it is in contact with the annular rib 45 formed in the lower case 16.

  The step portion 96B and the engagement wall 96 can be brought into contact with the upper surface of the upper flange 44 of the reel 40 and the inner peripheral surface of the reel hub 42. The step portion 96B and the engagement wall 96 are connected to the upper flange of the reel 40. The movement of the reel 40 is restricted in a state in which the upper surface of the reel 44 is in contact with the inner peripheral surface of the reel hub 42 (the lock member 90 is interposed between the inner surface of the top plate 14A of the upper case 14 and the upper flange 44 of the reel 40). Is done.

  By the way, a leaf spring 56 can be disposed at the center of the component mounting portion 55. As shown in FIGS. 5 and 7, the leaf spring 56 includes a base portion 56 </ b> A and a leg piece 56 </ b> B. A hole portion 56 </ b> C is formed in the base portion 56 </ b> A, and a boss provided at the center of the component mounting portion 55. 72 can be fitted. On the other hand, the leg pieces 56B spread radially from the base portion 56A at intervals of 120 °, and each leg piece 56B is curved so as to form a large arc from the base portion 56A toward the distal end portion.

  In a state where the hole portion 56 </ b> C of the leaf spring 56 is fitted to the boss 72, the tip end portion of the boss 72 is caulked so that the leaf spring 56 does not come off from the boss 72. In this state, the leg piece 56B can come into contact with the inclined surface 94B of the cam portion 94 of the lock member 90 housed in the housing portion 60.

  Here, the holding portion 70 protrudes on a line connecting the end of the arc wall 62 and the end of the arc wall 64, and the lock member 90 is accommodated in the accommodating portion 60 as shown in FIG. The lock member 90 is located on the left and right in the width direction. An undercut portion 70 </ b> A (protrusion) that forms a so-called undercut with respect to the drawing direction when the upper case 14 is released from the mold for molding the upper case 14 is formed on the surfaces of the front end portions of the holding portion 70 that face each other. (The amount: about 0.3 mm) is formed, and the shortest separation distance between the undercut portions 70 </ b> A is narrower than the width of the lock member 90.

  Since the holding portion 70 can be elastically deformed, when the lock member 90 is accommodated in the accommodating portion 60, the holding portions 70 are separated from each other so that the undercut portion 70 </ b> A does not interfere with the lock member 90. When accommodated, the undercut portion 70A covers the surface of the main body portion 92 of the lock member 90, and the lock member 90 is temporarily fixed.

  On the other hand, as shown in FIG. 5, the end portion of the guide wall portion 68 and the end portion of the arc wall 64 are formed by a side wall 65 formed along a line connecting the end portion of the arc wall 62 and the end portion of the arc wall 64. The guide wall 68 is reinforced, and the movement of the lock member 90 is restricted while the lock member 90 is housed in the housing 60.

  In addition, a stopper rib 74 protrudes from the outer side of the arc wall 62 so as to correspond to the accommodating portion 60. A lock member 90 can be brought into contact with the stopper rib 74, and the movement of the lock member 90 is restricted and temporarily fixed by the stopper rib 74 in a state where the lock member 90 is accommodated in the accommodating portion 60 (see FIG. 9).

  Here, since the contact surface 96A of the lock member 90 temporarily fixed by the stopper rib 74 is an arc surface that matches the inner peripheral surface of the reel hub 42 in plan view, when the recording tape cartridge 10 is assembled ( When the upper case 14 is put on the lower case 16), it is easily engaged with the upper edge portion of the reel hub 42 in accordance with the operation, and is pressed by the upper edge portion of the reel hub 42 as shown in FIG. An end surface 92 </ b> A of the main body 92 on the engagement wall 96 side is separated from the stopper rib 74.

  By the way, as shown in FIGS. 5 and 9, an annular stopper between the arc wall 64 and the arc wall 62 is larger than the outer diameter dimension of the arc wall 64 and smaller than the inner diameter dimension of the arc wall 62. 76 can be arranged. The stopper 76 is fixed to the support rib 66 by welding or the like in a state where the lock member 90 is accommodated in the accommodating portion 60.

  Thereby, the lock member 90 is completely prevented from coming off, and the lock member 90 can be prevented from dropping from the upper case 14 when the upper case 14 is put on the lower case 16. Here, since the leaf spring 56 can be attached even after the stopper 76 is welded to the support rib 66 and the lock member 90 is completely prevented from coming off, the plate spring 56 has good assemblability.

  By the way, in the state which accommodated the lock member 90 in the accommodating part 60, since the protrusion part 92D is lower than the height of the support rib 66, as shown in FIG.9 and FIG.10, as shown in FIG.9 and FIG.10. In a state where 76 is fixed, a gap C is provided between the stopper 76 and the projecting portion 92D, and the lock member 90 is secured. The stopper 76 also serves as a presser for the lock member 90 when the lock member 90 moves in the housing portion 60, and the movement stability of the lock member 90 can be achieved.

  The stopper 76 is used to prevent the lock member 90 from falling or jumping out, and therefore does not necessarily have a ring shape, and may be a plate member that is stretched over the upper surface of the lock member 90. Further, depending on the amount of protrusion of the undercut portion 70A of the holding portion 70, the lock member 90 may be completely prevented from being removed, and in this case, the stopper 76 or the like is not necessary. In addition, since the holding portion 70 does not necessarily have to be integrally formed with the upper case 14, the stopper 76 and the like are not necessary by fixing the lock member 90 to the upper case 14 as another member in order to prevent the locking member 90 from coming off. Become.

  As shown in FIG. 3, one end of the compression coil spring 78 can come into contact with the stopper 76, and the other end of the compression coil spring 78 abuts against the flat surface 80 </ b> A of the brake member 80. Touch. As a result, the reel 40 is biased toward the lower case 16 via the brake member 80.

  11A, when the recording tape cartridge 10 is not used, the brake member 80 is urged downward by the urging force of the compression coil spring 78, and the lock member 90 is a leaf spring. The urging force of 56 biases the reel 40 radially outward.

  At this time, the guide portion 84 inserted into the guide wall portion 68 prevents the brake member 80 from rotating relative to the case 12, and the brake gear 82 of the brake member 80 and the engagement gear 54 in the reel hub 42 are firmly meshed with each other. Thus, inadvertent rotation of the reel 40 is prevented.

  Then, in a state where the lower flange 46 of the reel 40 is in contact with the annular rib 45 formed on the lower case 16, the step portion 96 </ b> B and the engaging wall 96 of the lock member 90 are connected to the upper surface of the upper flange 44 of the reel 40 and the reel hub. When the recording tape cartridge 10 is not used, the movement of the reel 40 in the vertical direction is restricted by contacting the inner peripheral surface of the recording tape cartridge 10.

  On the other hand, when the recording tape cartridge 10 is used, as shown in FIG. 11B, the release projection 104 abuts on the operation projection 88 and the brake member 80 rises by a predetermined height against the urging force of the compression coil spring 78. To do. As a result, the engagement protrusion 86 and the cam portion 94 are in contact with each other, and the contact surface 86A of the engagement protrusion 86 and the contact surface 94A of the cam portion 94 are in sliding contact with each other.

  Here, since the contact surface 94A of the lock member 90 and the contact surface 86A of the engagement protrusion 86 are inclined, the axial direction of the hub 42 of the reel 40 transmitted from the contact surface 86A of the engagement protrusion 86 is increased. The working force is converted into a force that moves the lock member 90 in the horizontal direction, and the lock member 90 moves on the upper case 14 radially inward against the urging force of the leg piece 56B.

  As shown in FIG. 11C, when the cam portion 94 enters the inner surface side of the engagement protrusion 86, the contact state between the cam portion 94 and the engagement protrusion 86 is released. Thereby, the engagement state of the lock member 90, the brake member 80, and the reel 40 is released, and the reel 40 can be rotated in the case 12 and can be raised to a predetermined height.

  Here, when the cam portion 94 enters the inner surface side of the engagement protrusion 86, the pressing force (biasing force) by which the locking member 90 is pressed by the leaf spring 56 is applied via the outer surface of the cam portion 94. It will be received on the inside. Thus, when the brake member 80 is lifted by releasing the contact state between the contact surface 86A of the engagement protrusion 86 and the contact surface 94A of the cam portion 94, the pressing force of the leaf spring 56 is engaged. Transmission is prevented in the vertical direction of the mating protrusion 86.

  That is, when the recording tape cartridge 10 is used, the pressing force by the leaf spring 56 acts only in the radial direction (horizontal direction) and not in the vertical direction (vertical direction). Only the pressing force of the coil spring 78 is obtained. Therefore, even if the leaf spring 56 is provided, the force required to raise the brake member 80 is not increased.

  Next, the operation of the recording tape cartridge 10 configured as described above will be described.

  As shown in FIG. 1, when the recording tape cartridge 10 is not in use (when not loaded in the drive device), the door 30 closes the opening 20 by the urging force of the torsion spring 28. Further, the leader tape 22 is disposed along the left side wall 12 </ b> B when the protruding portion 22 </ b> B is stored (inserted) and held in the storage recess 24.

  When the recording tape cartridge 10 is not used, the brake member 80 is urged downward by the compression coil spring 78 as shown in FIGS. 3 and 11A. That is, due to the biasing force of the compression coil spring 78, the braking gear 82 of the brake member 80 is firmly engaged with the engagement gear 54 in the reel hub 42, and the reel 40 is prevented from rotating unintentionally.

  Then, the locking member 90 is urged outward in the radial direction of the reel 40 by the urging force of the leaf spring 56, and the stepped portion 96 </ b> B and the engagement wall 96 are connected to the upper surface of the upper flange 44 of the reel 40 and the inside of the reel hub 42. Each contact with the peripheral surface (the engaging wall 96 engages with the upper edge of the reel hub 42), and the vertical movement of the reel 40 is restricted.

  On the other hand, when data is recorded on the recording tape T (see FIG. 3) of the recording tape cartridge 10 shown in FIG. 1 or when the data recorded on the recording tape T of the recording tape cartridge 10 is reproduced, the recording tape cartridge 10 Is loaded into a drive device (not shown). That is, the recording tape cartridge 10 is inserted into the loading port (not shown) of the drive device from the front wall 12A side.

  With this loading, when the opening / closing member (not shown) of the drive device relatively approaches and contacts the right end portion (right side of the support shaft 26) of the door 30 and presses the right end portion, the door 30 is The opening 20 is opened by rotating about the support shaft 26 against the biasing force of the torsion spring 28.

  When the door 30 is rotated and the opening 20 is opened, a drawing member (not shown) of the drive device approaches the opening 20 from the left side wall 12B side and engages with the hole 22A of the leader tape 22. At this time, since the leader tape 22 stands by in the state of being close to the left side wall 12B, the drawing member can be reliably engaged with the hole 22A.

  Thus, when the drawing member is engaged with the hole 22 </ b> A, the drawing member is separated from the opening 20, whereby the leader tape 22 is drawn from the case 12. Then, the leader tape 22 drawn out from the case 12 is wound around a take-up reel (not shown) of the drive device.

  Next, as shown in FIGS. 3, 11 </ b> A, and 11 </ b> B, the rotary shaft 100 of the drive device enters from the gear opening 18 and approaches the bottom wall 48 of the reel 40. That is, the release protrusion 104 presses the operation protrusion 88, and the brake member 80 rises.

  As a result, the engagement between the engagement gear 54 and the braking gear 82 is released, and the engagement protrusion 86 abuts against the cam portion 94 of the lock member 90 so that the cam portion 94 extends in the axial direction of the hub 42 of the reel 40. Press along. Since the force transmitted from the contact surface 86A of the engagement protrusion 86 is converted into a force that moves the lock member 90 in the horizontal direction, the lock member 90 is on the upper case 14 against the urging force of the leaf spring 56. Is moved radially inward of the reel 40.

  That is, as shown in FIGS. 4 and 11C, the outer surface side of the engagement wall 96 of the lock member 90 is separated from the inner peripheral surface of the reel hub 42, and the cam portion 94 enters (falls) into the engagement protrusion 86. ), The step portion 96B of the lock member 90 is disposed inside the reel hub 42, and the engagement of the engagement wall 96 with the upper edge portion of the reel hub 42 is released.

  As a result, the reel 40 can rotate within the case 12 and can rise by a predetermined height. Then, when the rotary shaft 100 is raised, the drive gear 102 is engaged with the reel gear 50 and the reel plate 52 is attracted to the magnet 106.

  As described above, when the drive gear 102 is engaged with the reel gear 50, the reel 40 can be rotated at a predetermined height in the case 12, and the drive gear 102, that is, the reel 40 rotates in synchronization with the take-up reel. By driving, the recording tape T is sequentially sent to the drive device side. The recording / reproducing head (not shown) of the drive device records data on the recording tape T or reproduces data recorded on the recording tape T.

  When taking out the recording tape cartridge 10 from the drive device, first, the drive gear 102 is reversely rotated to rewind the recording tape T onto the reel 40. Then, the leader tape 22 is removed from the take-up reel and returned to the case 12 through the opening 20. That is, the protruding portion 22B of the leader tape 22 is stored (inserted) in the storage recess 24 and held at a predetermined position in the case 12.

  Next, as shown in the order of FIG. 11C, FIG. 11B, and FIG. 11A, the rotary shaft 100 is lowered and the reel 40 is lowered by the urging force of the compression coil spring 78. As a result, the locking member 90 moves outward in the radial direction of the reel 40 by the urging force of the leaf spring 56, while the contact surface 94A of the cam portion 94 slides on the contact surface 86A of the engagement protrusion 86. The engagement wall 96 engages with the upper edge portion of the reel hub 42.

  That is, due to the urging force of the leaf spring 56, the step portion 96 </ b> B and the engagement wall 96 of the lock member 90 come into contact with the upper surface of the upper flange 44 of the reel 40 and the inner peripheral surface of the reel hub 42. This restricts the vertical movement of the reel 40 when the recording tape cartridge 10 is not used.

  At this time, the urging force of the compression coil spring 78 causes the braking gear 82 to be firmly engaged with the engagement gear 54, and the reel 40 is prevented from rotating unintentionally. Then, when the rotating shaft 100 is extracted from the gear opening 18, the magnet 106 is separated from the reel plate 52, and the meshing of the drive gear 102 with the reel gear 50 is released.

  Thereafter, the recording tape cartridge 10 is discharged from the loading port. When the opening / closing member is separated from the right end portion of the door 30 along with the discharging operation, the door 30 is centered on the support shaft 26 by the urging force of the torsion spring 28. Rotate in the opposite direction to the above to close the opening 20.

  Next, the main part of the recording tape cartridge according to the embodiment of the present invention will be described.

  As shown in FIGS. 3 and 11A, in a state where the engagement wall 96 of the lock member 90 is engaged with the upper edge portion of the reel hub 42, the stepped portion 96B and the engagement wall 96 are the upper flange of the reel 40. The upper surface of 44 and the inner peripheral surface of the reel hub 42 are in contact with each other, whereby the vertical movement of the reel 40 is restricted when the recording tape cartridge 10 is not used.

  For this reason, even if an impact is applied to the recording tape cartridge 10 due to dropping or the like, the reel 40 does not rise. Therefore, the trouble that the brake member 80 tilts and falls does not occur. Further, when the recording tape cartridge 10 is dropped, the problem that the upper flange 44 or the lower flange 46 provided on the reel 40 is damaged due to the reel 40 moving in the case 12 is also improved.

  Further, as shown in FIGS. 2 and 9, a component mounting portion 55 is provided at the center of the inner surface of the top plate 14 </ b> A of the upper case 14, and a boss 72 is provided at the center of the component mounting portion 55 to mount a leaf spring 56. The leg piece 56B of the leaf spring 56 is brought into contact with the inclined surface 94B of the lock member 90, and the lock member 90 is urged from the center portion of the upper case 14.

  When the leaf spring 56 is disposed on the peripheral wall 14B side of the upper case 14 and the lock member 90 is biased from the peripheral wall 14B side of the upper case 14, the reel 40 is accommodated on the peripheral wall 14B side of the upper case 14. Ribs (not shown) for reinforcing the housing ribs 41 and the upper case 14 are provided, and it is difficult to secure a space.

  For this reason, by arranging the leaf spring 56 in the central portion of the upper case 14 and urging the lock member 90 from the central portion of the upper case 14, a space can be easily secured and the upper case can be secured. The center part of 14 can be utilized effectively.

  Further, as shown in FIG. 6, a pair of recesses 92 </ b> C are provided along the longitudinal direction of the lock member 90 on the back surface of the lock member 90 (sliding surface with the top plate 14 </ b> A of the upper case 14). Thus, the sliding area between the lock member 90 and the top plate 14A (see FIG. 5) of the upper case 14 can be reduced. For this reason, the sliding resistance when the lock member 90 slides on the top plate 14A of the upper case 14 can be reduced, and the movement of the lock member 90 can be made smooth.

  Note that it is sufficient that the sliding area between the lock member 90 and the top plate 14A of the upper case 14 can be reduced. Therefore, the present invention is not limited to this. For example, as shown in FIG. The part 89 may be provided in a projecting manner. Although not shown, a concave portion or a convex portion may be formed on the upper case 14 side. In order to reduce the sliding resistance with the top plate 14A of the upper case 14 on the back surface of the lock member 90, the surface roughness is reduced. You may perform surface treatment, such as making it small. Further, a sliding sheet or the like may be fixed or coated on the back surface of the lock member 90.

  By the way, as shown in FIG. 7, the leaf spring 56 is composed of a base portion 56A and a leg piece 56B, and the leg piece 56B is radially expanded from the base portion 56A, so that one piece is provided regardless of the number of the lock members 90. The leaf spring 56 is good. For this reason, at the time of assembling, it is only necessary to assemble one leaf spring 56 regardless of the number of the lock members 90, so that the assembling becomes easy and workability is improved.

  In addition, since the vertical direction of the leaf spring 56 is clarified by bending the leg piece 56B from the base portion 56A to the distal end portion so as to draw a large arc, there is no possibility of assembling the leaf spring 56 upside down.

Further, as shown in FIGS. 9 and 10, with the leaf spring 56 fitted to the boss 72, the leg piece 56 </ b> B comes into contact with the cam portion 94 of the lock member 90, and the lock member 90 is separated from the boss 72. The contact surface of the cam portion 94 with which the leg piece 56B contacts is an inclined surface 94B (angle θ), and slightly inward as it goes to the end portion side of the cam portion 94. Tilt. Thus, it is possible to generate a component force F _y to press the lock member 90 to the upper case 14 side, the locking member 90 can be prevented away from the upper case 14.

That is, as shown in FIG. 13, the pressing force F of the leaf spring 56 acts on the lock member 90 in a state where the leg piece 56 </ b> B of the leaf spring 56 is in contact with the inclined surface 94 </ b> B of the cam portion 94 of the lock member 90. When the pressing force F is decomposed into a force acting in the horizontal direction and a force acting in the vertical direction (so-called component force) with respect to the inclined surface 94B, the pressing force F is a component acting in the vertical direction and a component force F ₁ acting in the horizontal direction. It is decomposed into a force F _2.

Here, it is assumed that the component force F ₂ is a force acting along the inclined surface 94B and does not affect the lock member 90 at all. On the other hand, the component force F ₁ is decomposed into a force acting in the horizontal direction F _x or the vertical direction F _y with respect to the lock member 90. The force in the vertical direction F _y pushes the lock member 90 toward the upper case 14 side. Thus, the lock member 90 is prevented from being separated from the upper case 14.

  Next, a modified example in which a coil spring 58 is used instead of the leaf spring 56 as an urging means for urging the lock member will be described. In addition, about the content equivalent to the above, the same code | symbol is attached | subjected and the description is abbreviate | omitted. A coil spring 58 is provided for each lock member. Therefore, three are provided in this case.

  As shown in FIGS. 14 and 15, the outer surface of the cam portion 94 of the lock member 91 is a vertical surface with respect to the case 14. It protrudes along the longitudinal direction of the lock member 90, and one end part of the coil spring 58 is inserted therein. A straight portion 92B extending from the main body 92 is provided below the insertion portion 98, and supports one end of the coil spring 58 attached to the insertion portion 98 (described later).

  On the other hand, a locking projection 73 having a substantially triangular prism is provided at the center of the component mounting portion 55, and a groove 73 </ b> A is provided on each side surface over the entire height of the locking projection 73. The groove 73A is wider on the back side than on the inlet side, and the other end of the coil spring 58 is engaged with the groove 73A in a state where one end of the coil spring 58 is attached to the fitting portion 98. Since the width of the groove 73A is narrower on the inlet side than on the rear side, the other end of the coil spring 58 is not easily detached in the horizontal direction.

  By the way, as shown in FIG. 17B, the release protrusion 104 comes into contact with the operation protrusion 88, and the brake member 80 rises by a predetermined height against the urging force of the compression coil spring 78. When the contact surface 86 </ b> A contacts the contact surface 94 </ b> A of the cam portion 94 of the lock member 91, a pressing force along the axial direction of the reel 40 is applied to the contact surface 94 </ b> A of the cam portion 94.

  On the other hand, as shown in FIG. 18, when the straight portion 92 </ b> B does not protrude from the main body portion 92 of the lock member 91 (shown by an imaginary line), the cam portion 94 is located on one end side in the longitudinal direction of the lock member 91. Therefore, the rotation moment M acts on the corner portion P of the lock member 90 in a state where the cam portion 94 is pressed by the engagement protrusion 86.

However, by projecting the straight portion 92 </ b> B from the main body 92 of the lock member 91, a rotational moment M ₁ (M ₁ = M) that resists the rotational moment M can be obtained from the upper case 14. Thereby, the force which always urges the lock member 91 to the upper case 14 side can be given, the inclination of the lock member 91 can be prevented, and the lock member 91 can be kept away from the upper case 14.

  For this reason, the coil spring 58 and the lock member 91 can be prevented from popping out when the coil spring 58 and the lock member 91 are assembled. Further, by projecting the straight portion 92 </ b> B from the main body 92 of the lock member 91, the center of gravity of the lock member 91 can be on the back side (upper case 14 side) of the lock member 91, and the stability of the lock member 91 is Can be achieved.

  By using the coil spring 58 instead of the leaf spring 56 with such a configuration, the coil spring 58 is considerably cheaper in the unit price than the leaf spring 56, so the workability is slightly worsened, but the cost is reduced. Can do.

  Here, the leaf spring 56 or the coil spring 58 has been described, but it is only necessary to be able to bias the lock member 90 or the lock member 91. Therefore, the present invention is not limited to this, and a torsion spring or the like may be used. .

  For example, as shown in FIGS. 20 and 21, one end portion of the torsion spring 150 is brought into contact with the locking projection 73, and the other end portion of the torsion spring 150 is brought into contact with the lock member 152. The lock member 152 is urged toward the radially outer side of the reel 40.

  Here, a mounting boss 154 having a height lower than that of the guide wall portion 68 is erected in the vicinity of the distal ends of the pair of guide wall portions 68 of the component mounting portion 55, and the shaft core portion of the torsion spring 150 is mounted. Further, since one end portion of the torsion spring 150 is brought into contact with the locking projection 73 of the component mounting portion 55, it is not necessary to provide the groove portion 73A (see FIG. 14).

  On the other hand, in place of the fitting portion 98 of the lock member 91 shown in FIG. 14, the lock member 152 has a mounting rib 156 erected on the straight portion 92 </ b> B and is cut out on the side of the mounting rib 156 facing the locking projection 73. A portion 158 is formed so that the other end of the torsion spring 150 is locked.

  Thereby, even if the lock member 152 is moved, the other end portion of the torsion spring 150 is not detached from the lock member 152, and the movement of the lock member 152 can be stabilized.

  By the way, in this embodiment, as shown in FIG. 7, it is bent so as to draw a large arc from the base portion 56A of the leg piece 56B of the leaf spring 56 to the tip portion. However, it may be formed by a straight portion from the base portion of the leg piece to the tip portion.

  Further, the configuration itself of the leaf spring 56 may be changed. For example, as shown in FIGS. 22 and 23, a leaf spring 162 may be provided for each lock member 160.

  Here, the leaf spring 162 is formed in a substantially square shape, and both end portions are on the same plane so as to be directed away from each other. On the other hand, a locking boss 164 having a height lower than that of the guide wall portion 68 is erected in the vicinity of the distal ends of the pair of guide wall portions 68 of the component mounting portion 55. The locking boss 164 is formed to provide a gap slightly wider than the thickness of the leaf spring 162 between the end of the guide wall 68 and the tip of the side wall 65 that bridges the end of the arc wall 64. Then, the end of the leaf spring 162 is fitted into the gap.

  At this time, the leaf spring 162 is arranged so that the top of the leaf spring 162 is on the lock member 160 side. As a result, the leaf spring 162 abuts against the straight portion 92B of the lock member 160, and urges the lock member 152 outward in the radial direction of the reel 40.

  In this embodiment, the compression coil spring 78 presses the brake gear 82 of the brake member 80 toward the engagement gear 54 of the reel hub 42. However, if the brake gear 82 and the engagement gear 54 can be engaged with each other. For good, it is not limited to this.

  19A to 19C, the inclination angle of the contact surface 95A of the cam portion 95 of the lock member 93 is changed to make the brake member 80 non-rotatable with respect to the case 12 (FIG. 19). (See (A)), the contact surface 95A of the cam portion 95 and the contact surface 86A of the engagement protrusion 86 of the brake member 80 are brought into contact with each other, and the urging force of the leaf spring 56 causes the brake gear 82 to engage with the engagement gear 54. You may make it give the component force pressed to the side. Thereby, the compression coil spring 78 can be made unnecessary. As a result, the number of parts is reduced, and the cost can be reduced.

  Further, in the above-described embodiment, the reel 40 is disposed substantially at the center of the case 12. However, the reel 40 does not necessarily have to be disposed at the center of the case 12.

  Also, here, the configuration in which the recording tape cartridge 10 has the leader tape 22 has been illustrated, but the present invention is such that the shape of the case 12, the drawing structure of the magnetic tape T (configuration of the leader member), the opening / closing structure of the gear opening 18, etc. It is not limited by. Therefore, for example, the recording tape cartridge 10 may have a configuration in which a small cylindrical leader pin is attached to the tip of the magnetic tape T as a leader member, and a shielding member that opens and closes the gear opening 18 (along a predetermined straight line or arc). It is good also as a structure which has a sliding door etc. which move.

  In the above-described embodiment, the engaging portion with the brake member 80 is the engaging gear 54. However, the embodiment is not limited to this as long as the rotation of the reel 40 can be restricted. In this case, of course, the shape of the brake member changes with the shape of the engaging portion.

  Furthermore, in the above embodiment, the magnetic tape T is used as the recording tape. However, the present invention is not limited to this, and the recording tape is long and capable of recording information and reproducing the recorded information. Needless to say, the recording tape cartridge according to the present invention is applicable to any recording / reproducing system recording tape as long as it can be grasped as a tape-shaped information recording / reproducing medium.

1 is a perspective view showing an external appearance of a recording tape cartridge according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of the recording tape cartridge according to the embodiment of the present invention in an upside down state. FIG. 6 is a cross-sectional view of the recording tape cartridge according to the embodiment of the present invention when the reel rotation is restricted. FIG. 5 is a cross-sectional view of the recording tape cartridge according to the embodiment of the present invention when the reel is allowed to rotate. FIG. 3 is an exploded perspective view showing components, a brake member, and the like mounted in a component mounting portion of the recording tape cartridge according to the embodiment of the present invention. It is the perspective view which looked at the lock member which constitutes the recording tape cartridge concerning an embodiment of the invention from the back side. It is a disassembled perspective view which shows the principal part of FIG. FIG. 3 is a cross-sectional view showing a relationship between a lock member and a holding portion that constitute the recording tape cartridge according to the embodiment of the invention. It is a perspective view which shows the state which attached each component of FIG. 5 to the component attachment part. FIG. 3 is a cross-sectional view showing a relationship between a stopper and a support rib constituting the recording tape cartridge according to the embodiment of the invention. (A)-(C) are operation | movement diagrams which show the relationship between the recording tape cartridge which concerns on embodiment of this invention, and the rotating shaft of a drive apparatus. It is the perspective view which looked at the modification of the locking member which comprises the recording tape cartridge which concerns on embodiment of this invention from the back surface side. FIG. 5 is an explanatory view showing a relationship between a lock member and a leaf spring constituting the recording tape cartridge according to the embodiment of the invention. FIG. 6 is an exploded perspective view showing a modified example of components to be mounted in a component mounting portion of the recording tape cartridge according to the embodiment of the present invention, a brake member, and the like. It is a disassembled perspective view of the principal part of FIG. It is a perspective view which shows the state which attached each component of FIG. 14 to the component attachment part. (A)-(C) are operation | movement diagrams which show the modification of the recording tape cartridge which concerns on embodiment of this invention. FIG. 4 is an explanatory diagram showing a relationship between a lock member and a brake member that constitute the recording tape cartridge according to the embodiment of the invention. (A)-(C) are operation | movement diagrams which show the other modification of the recording tape cartridge which concerns on embodiment of this invention. FIG. 10 is an exploded perspective view showing another modified example of a component to be mounted in a component mounting portion of the recording tape cartridge according to the embodiment of the present invention, a brake member, and the like. It is a perspective view which shows the state which attached each component of FIG. 20 to the component attachment part. FIG. 10 is an exploded perspective view showing another modified example of a component to be mounted in a component mounting portion of the recording tape cartridge according to the embodiment of the present invention, a brake member, and the like. It is a perspective view which shows the state which attached each component of FIG. 22 to the component attachment part. It is sectional drawing which shows the conventional recording tape cartridge.

Explanation of symbols

10 Recording tape cartridge 12 Case 40 Reel 50 Reel gear (engagement part)
55 Parts mounting part 56A Base part (base part, connecting part)
56B Leg piece 56C Hole 56 Leaf spring (biasing means)
80 Brake member (braking member)
90 Lock member 91 Lock member 92B Straight part (stable part)
92C Concave part (concave part)
93 Locking member 94B Inclined surface 150 Torsion spring (biasing means)
152 Locking member 160 Locking member 162 Leaf spring (biasing means)

Claims (6)

An engaging portion formed in a bottom wall of a hub of a reel that is rotatably accommodated in a case and wound with a recording tape;
It faces the engagement portion and is provided so as to be movable along the axial direction of the hub, engages with the engagement portion to restrict the rotation of the reel, and releases the engagement state with the engagement portion. A braking member that allows rotation of the reel,
A component mounting portion formed in the case;
The reel is mounted on the component mounting portion so as to be movable in the radial direction, and is interposed between the reel and the case to restrict the movement of the reel in the axial direction. A locking member that allows movement;
Urging means for urging the locking member in the radial direction of the reel and restricting movement of the reel in the axial direction by being interposed between the reel and the case;
Concave and convex portions provided on the sliding surface between the lock member and the case,
A recording tape cartridge comprising: An engaging portion formed in a bottom wall of a hub of a reel that is rotatably accommodated in a case and wound with a recording tape;
It faces the engagement portion and is provided so as to be movable along the axial direction of the hub, engages with the engagement portion to restrict the rotation of the reel, and releases the engagement state with the engagement portion. A braking member that allows rotation of the reel,
A component mounting portion formed in the case;
The reel is mounted on the component mounting portion so as to be movable in the radial direction, and is interposed between the reel and the case to restrict the movement of the reel in the axial direction. A locking member that allows movement;
Urging means for urging the lock member outward in the radial direction of the reel and restricting movement of the reel in the axial direction by being interposed between the reel and the case;
With
The locking member is
When the braking member is abutted and pressed against the braking member, the axial movement of the braking member is converted into the radial movement of the reel, and the locking member is resisted against the biasing force of the biasing means. A cam part that is moved radially inward,
A stabilizing portion that projects by abutting the case against a rotation moment that protrudes inward in the radial direction of the reel from the cam portion and resists the rotation moment that acts on the lock member by the pressing force of the braking member. When,
Recording tape cartridge characterized in that it is configured to include.   The said urging | biasing means is a leaf | plate spring formed with the base fixed to the center of the said component attachment part, and the leg piece which spreads radially from the said base, The Claim 1 or 2 characterized by the above-mentioned. Recording tape cartridge.   4. The recording according to claim 3, wherein an inclined surface is formed on the lock member so as to obtain a component force of the force that presses the lock member against the case side by the urging force of the leaf spring with which the leg piece abuts. Tape cartridge. An engaging portion formed in a bottom wall of a hub of a reel that is rotatably accommodated in a case and wound with a recording tape;
It faces the engagement portion and is provided so as to be movable along the axial direction of the hub, engages with the engagement portion to restrict the rotation of the reel, and releases the engagement state with the engagement portion. A braking member that allows rotation of the reel,
A component mounting portion formed in the case;
The reel is mounted on the component mounting portion so as to be movable in the radial direction, and is interposed between the reel and the case to restrict the movement of the reel in the axial direction. A locking member that allows movement;
Urging means for urging the locking member in the radial direction of the reel and restricting movement of the reel in the axial direction by being interposed between the reel and the case;
With
The recording tape cartridge according to claim 1, wherein the biasing means is a leaf spring formed of a base fixed to the center of the component mounting portion and leg pieces extending radially from the base. An engaging portion formed in a bottom wall of a hub of a reel that is rotatably accommodated in a case and wound with a recording tape;
It faces the engagement portion and is provided so as to be movable along the axial direction of the hub, engages with the engagement portion to restrict the rotation of the reel, and releases the engagement state with the engagement portion. A braking member that allows rotation of the reel,
A component mounting portion formed in the case;
The reel is mounted on the component mounting portion so as to be movable in the radial direction, and is interposed between the reel and the case to restrict the movement of the reel in the axial direction. A locking member that allows movement;
Urging means for urging the locking member in the radial direction of the reel and restricting movement of the reel in the axial direction by being interposed between the reel and the case;
With
The biasing means is a leaf spring, and the leaf spring abuts, and an inclined surface is formed on the lock member to obtain a component force of pressing the lock member against the case by the biasing force of the leaf spring. A recording tape cartridge characterized by the above.

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