JP4102846B1 - Recording tape cartridge - Google Patents

Abstract

An object of the present invention is to provide a recording tape cartridge in which an overhanging portion overlapping a flange portion of a leader pin is not damaged even when an impact such as dropping is applied to the case.
SOLUTION: A leader pin 30 having flange portions 36 formed at both ends, a holding portion 40 formed on the case 12 and holding the flange portion 36 of the leader pin 30 in the vicinity of the opening 18, and formed on the holding portion 40. In the recording tape cartridge 10, the leader pin is provided with an overhanging portion 44 that overlaps the flange portion 36 on the inner surface 36 </ b> B side, and a wall surface 43 that is formed in the holding portion 40 and faces the circumferential surface 36 </ b> C of the flange portion 36. When the surface 30 is tilted, the inner surface 36B of the flange portion 36 and the overhanging portion so that the peripheral surface 36C of the flange portion 36 contacts the wall surface 43 before the inner surface 36B of the flange portion 36 contacts the overhanging portion 44. 44, and a clearance C1 between the peripheral surface 36C of the flange portion 36 and the wall surface 43.
[Selection] Figure 9

Description

  The present invention relates to a recording tape cartridge in which a reel around which a recording tape such as a magnetic tape used mainly as a recording / reproducing medium of a computer or the like is wound is contained in a case.

  Conventionally, 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 reel, and the reel is accommodated in a single case composed of an upper case and a lower case. A recording tape cartridge is known. A leader member to be pulled out by a pull-out member of the drive device is fixed to the leading end of the recording tape. As an example of the leader member, flanges are provided at both ends of the main body portion to which the recording tape is fixed directly or via the leader tape. There is a generally arrayed leader pin with a section.

  The leader pin is held in a concave holding part formed in the upper case and the lower case in the vicinity of the opening, and the flange part is held by a spring or the like so that the height direction of the case is held in the axial direction. Is done. Therefore, when a shock is applied to the vicinity of the opening due to dropping or the like, and the upper case and the lower case are bent and deformed so as to be separated from each other (so-called mouth opening), the flange portion comes off from the holding portion, and the leader pin There was a risk of tilting or detaching from the holding part.

  When such a phenomenon occurs, there arises a problem that the drawing member of the drive device causes a chuck failure with respect to the leader pin, resulting in a system error. Therefore, the holding tape is formed with an undercut portion that locks the flange portion of the leader pin, that is, a protruding portion that overlaps the flange portion, and prevents the flange portion of the leader pin from coming off from the holding portion. Conventionally, a cartridge has been proposed (see, for example, Patent Document 1).

However, since such an overhanging portion has a positional relationship adjacent to a hook or the like of the drawing member of the drive device, the plate thickness cannot be formed thick. That is, when the plate thickness of the overhanging portion is increased, a problem that the hooks interfere with each other occurs. Therefore, when the impact is applied to the case due to dropping or the like, and the leader pin tries to tilt in a direction other than the withdrawal direction, for example, in a direction substantially orthogonal to the withdrawal direction, the overhanging portion is caused by the pressing force applied from the leader pin. Could be damaged.
JP 2001-148179 A

  Therefore, in view of the above circumstances, the present invention has an object to obtain a recording tape cartridge that does not cause the overhanging portion overlapping the flange portion of the leader pin to be damaged even when an impact such as dropping is applied to the case. To do.

In order to achieve the above object, a recording tape cartridge according to claim 1 of the present invention is composed of an upper case and a lower case, and a case for accommodating a reel around which a recording tape is wound. A leader pin attached to an end of the recording tape directly or via a leader tape and having flanges formed at both ends; an opening formed in the case for pulling out the leader pin; the upper case; A flange formed on the lower case and holding the flange portion of the leader pin in the vicinity of the opening, and formed on at least one of the holding portions, and when the leader pin is held by the holding portion, the flange A protruding portion that overlaps the flange portion in a non-contact manner on the inner surface side of the portion and the holding portion, and the leader pin is held by the holding portion And the peripheral surface of the flange portion before the inner surface of the flange portion contacts the projecting portion when the leader pin is tilted. A clearance between the inner surface of the flange portion and the overhang portion and a clearance between the peripheral surface of the flange portion and the wall surface are defined so as to contact the wall surface.
According to a fourth aspect of the present invention, there is provided a recording tape cartridge comprising an upper case and a lower case, a case for accommodating a reel around which the recording tape is wound, and an end portion of the recording tape. A leader pin attached directly or via a leader tape and having flange portions formed at both ends, an opening for pulling out the leader pin formed in the case, and formed in the upper case and the lower case, A holding portion that holds the flange portion of the leader pin in the vicinity of the opening, and is attached to at least one of the holding portions, and when the leader pin is held by the holding portion, on the inner surface side of the flange portion, An overhang portion that overlaps the flange portion in a non-contact manner, and the flange portion is formed on the holding portion, and the flange is formed when the leader pin is held by the holding portion. And the peripheral surface of the flange portion comes into contact with the wall surface before the inner surface of the flange portion contacts the overhanging portion when the leader pin is tilted. In addition, a clearance between the inner surface of the flange portion and the overhang portion and a clearance between the peripheral surface of the flange portion and the wall surface are defined.

According to the first and fourth aspects of the present invention, when an impact is applied to the case due to dropping or the like and the leader pin attempts to tilt in a direction other than the pulling-out direction, first, the flange portion of the leader pin Since the peripheral surface collides (pressure contact) with the wall surface formed in the holding portion, the inner surface of the flange portion does not contact (pressure contact) the overhanging portion. Therefore, there is no possibility that the overhang portion is damaged. In addition, since the wall surface formed in the holding | maintenance part is comparatively high, even if the surrounding surface of a flange part collides (pressure contact), it can fully endure.

According to a second aspect of the present invention, there is provided a recording tape cartridge comprising an upper case and a lower case, a case for accommodating a single reel around which the recording tape is wound, and an end of the recording tape. A leader pin attached directly or via a leader tape and having flange portions formed at both ends of the main body, an opening formed in the case for pulling out the leader pin, and formed in the upper case and the lower case A holding portion that holds the flange portion of the leader pin in the vicinity of the opening, and an inner surface side of the flange portion when the leader pin is held by the holding portion. Then, an overhang portion that overlaps the flange portion and the holding portion, and when the leader pin is held by the holding portion, A wall faced to face, and when the leader pin is tilted, before the body part comes into contact with the overhanging part, the peripheral surface of the flange part comes into contact with the wall surface. The clearance between the flange portion and the overhang portion and the clearance between the peripheral surface of the flange portion and the wall surface are defined.
According to a fifth aspect of the present invention, there is provided a recording tape cartridge comprising an upper case and a lower case, a case for accommodating a reel around which the recording tape is wound, and an end portion of the recording tape. A leader pin attached directly or via a leader tape and having flange portions formed at both ends of the main body, an opening formed in the case for pulling out the leader pin, and formed in the upper case and the lower case A holding portion that holds the flange portion of the leader pin in the vicinity of the opening, and is attached to at least one of the holding portions, and when the leader pin is held by the holding portion, the inner surface side of the flange portion The flange portion overlaps with the flange portion, and is formed in the holding portion. When the leader pin is held by the holding portion, the flange portion And the peripheral surface of the flange portion is in contact with the wall surface before the main body portion contacts the overhanging portion when the leader pin is tilted. A clearance between the main body portion and the overhang portion and a clearance between the peripheral surface of the flange portion and the wall surface are defined.

According to the second and fifth aspects of the present invention, when an impact is applied to the case due to dropping or the like, and the leader pin attempts to tilt in a direction other than the pull-out direction, first, the flange portion of the leader pin Since the peripheral surface collides (pressure contact) with the wall surface formed on the holding portion, the main body portion of the leader pin does not contact (pressure contact) the overhanging portion. Therefore, there is no possibility that the overhang portion is damaged. In addition, since the wall surface formed in the holding | maintenance part is comparatively high, even if the surrounding surface of a flange part collides (pressure contact), it can fully endure.

According to a third aspect of the present invention, there is provided a recording tape cartridge comprising an upper case and a lower case, a case for accommodating a reel around which the recording tape is wound, and an end of the recording tape. A leader pin attached directly or via a leader tape and having flange portions formed at both ends of the main body, an opening formed in the case for pulling out the leader pin, and formed in the upper case and the lower case A holding portion that holds the flange portion of the leader pin in the vicinity of the opening, and an inner surface side of the flange portion when the leader pin is held by the holding portion. Then, when the leader pin is held by the holding portion and formed in the holding portion and the protruding portion that overlaps the flange portion in a non-contact manner, the A wall surface opposite to the outer peripheral surface of the flange portion, and when the leader pin is tilted, the inner surface of the flange portion is in contact with the protruding portion, and the main body portion is located on the protruding portion. Before contact, the clearance between the inner surface of the flange portion and the overhanging portion, and the clearance between the main body portion and the overhanging portion so that the peripheral surface of the flange portion contacts the wall surface. The clearance between the peripheral surface of the flange portion and the wall surface is defined.
According to a sixth aspect of the present invention, there is provided a recording tape cartridge comprising an upper case and a lower case, a case for accommodating a reel around which the recording tape is wound, and an end of the recording tape. A leader pin attached directly or via a leader tape and having flange portions formed at both ends of the main body, an opening formed in the case for pulling out the leader pin, and formed in the upper case and the lower case A holding portion that holds the flange portion of the leader pin in the vicinity of the opening, and is attached to at least one of the holding portions, and when the leader pin is held by the holding portion, the inner surface side of the flange portion Then, an overhanging portion that overlaps the flange portion in a non-contact manner and the holding portion, and when the leader pin is held by the holding portion, A wall surface facing the circumferential surface of the lunge portion, and when the leader pin is tilted, before the inner surface of the flange portion comes into contact with the overhanging portion, and the main body portion becomes the overhanging portion. Before contact, the clearance between the inner surface of the flange portion and the overhanging portion, and the clearance between the main body portion and the overhanging portion so that the peripheral surface of the flange portion contacts the wall surface. The clearance between the peripheral surface of the flange portion and the wall surface is defined.

According to the third and sixth aspects of the present invention, when an impact is applied to the case due to dropping or the like and the leader pin tries to tilt in a direction other than the pulling-out direction, first, the flange portion of the leader pin Since the peripheral surface of the cylinder collides (pressure contact) with the wall surface formed on the holding part, the inner surface of the flange part does not contact (pressure contact) with the overhanging part, and the main body part contacts with the overhanging part (pressure welding). There is nothing to do. Therefore, there is no possibility that the overhang portion is damaged. In addition, since the wall surface formed in the holding | maintenance part is comparatively high, even if a flange part collides (pressure contact), it can fully endure.

The recording tape cartridge according to claim 7 is the recording tape cartridge according to any one of claims 1 to 6 , wherein the wall surface is formed in an arc shape in plan view, and the curvature of the wall surface is It is characterized by being formed to be equal to or smaller than the curvature of the flange portion.

According to invention of Claim 7 , the rigidity of a wall surface can be improved. Moreover, when the curvature of the wall surface is formed smaller than the curvature of the flange portion, when the leader pin is accommodated in the holding portion, the flange portion can be prevented from interfering with the end portion of the wall surface.

The recording tape cartridge according to claim 8 is the recording tape cartridge according to any one of claims 1 to 7 , wherein when the leader pin is tilted in the pull-out direction, the inner surface of the flange portion is A clearance between the inner surface of the flange portion and the overhang portion is defined so as to contact the overhang portion.

According to the eighth aspect of the present invention, when the leader pin is tilted in the pulling-out direction, the inner surface of the flange portion can be received by the end portion on the wall surface side of the protruding portion. Therefore, it is possible to prevent the leader pin from being tilted in the pull-out direction when not used in the drive device. In addition, since the edge part by the side of the wall surface of an overhang | projection part is comparatively high, there is no possibility that an overhang part may be damaged.

  As described above, according to the present invention, it is possible to provide a recording tape cartridge in which the overhanging portion overlapping the flange portion of the leader pin is not damaged even when an impact such as dropping is applied to the case. .

  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. 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 forward direction (front side) of the recording tape cartridge 10. An arrow B direction orthogonal to the arrow A is a right direction (right side), and an arrow C direction is an upper direction (upper side).

  As shown in FIGS. 1 and 2, the recording tape cartridge 10 has a case 12 having a substantially rectangular box shape. In this case 12, the upper case 14 and the lower case 16 made of synthetic 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 standing on the periphery of the bottom plate 16A. In a state where the 16Bs are in contact with each other, they are joined by ultrasonic welding, screwing, or the like.

  Inside the case 12, only one reel 20 is rotatably accommodated. In the reel 20, a bottomed cylindrical reel hub 22 constituting an axial center portion and a lower flange 26 provided at a lower end portion thereof are integrally formed, and an upper flange 24 is ultrasonically welded to an upper end portion of the reel hub 22. Configured. A recording tape T such as a magnetic tape as an information recording / reproducing medium is wound on the outer peripheral surface of the reel hub 22, and the end of the wound recording tape T in the width direction is wound by the upper flange 24 and the lower flange 26. Part is held.

  A reel gear (not shown) is formed in an annular shape on the lower surface of the bottom wall 28 of the reel hub 22, and a gear opening 46 for exposing the reel gear to the outside is formed in the center portion of the lower case 16. Has been. The reel gear exposed from the gear opening 46 is meshed with a drive gear (not shown) formed on a rotating shaft (not shown) of a drive device (not shown) and is driven to rotate in the case 12. The reel 20 can be rotated relative to the case 12.

  Further, an annular reel plate (not shown) made of a magnetic material is fixed to the inner surface in the radial direction of the reel gear on the lower surface of the bottom wall 28 by insert molding or the like, and an annular magnet provided on the rotating shaft of the drive device. It is attracted and held by a magnetic force (not shown). Further, 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 an idle regulation wall 48 as an inner wall on a circular locus coaxial with the gear opening 46. Is held in.

  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 directly or via a leader tape (not shown).

  As shown in detail in FIG. 3, the leader pin 30 is a cylindrical main body 32 and a disc-like shape integrally formed at both ends of the main body 32 with a diameter larger than the diameter of the main body 32. The main body portion 32 is integrally formed with a small flange portion 34 that defines an area to which the recording tape T is attached. The diameter of the small flange portion 34 is larger than the diameter of the main body portion 32 and is equal to or smaller than the diameter of the flange portion 36.

  The small flange portion 34 is formed thinner than the flange portion 36, and the space between the small flange portion 34 and the flange portion 36 is locked by a hook (not shown) of a pull-out member of the drive device. An annular groove 35 is provided. By providing the small flange portion 34, 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. The outer surface 36A of the flange portion 36 is a convex curved surface with a small curvature.

  A pair of upper and lower holding portions 40 for positioning and holding the leader pin 30 in the case 12 are provided inside the opening 18 of the case 12, that is, on the inner surface of the top plate 14 </ b> A of the upper case 14 and the inner surface of the bottom plate 16 </ b> A of the lower case 16. Is provided. As shown in FIG. 4, the holding portion 40 is formed on the inner surface of the top plate 14 </ b> A and the inner surface of the bottom plate 16 </ b> A, and has a concave portion 41 having a substantially “U” shape in plan view with the drawing-out side of the recording tape T opened. The flange portion 36 of the leader pin 30 in the upright state can enter and exit into the recess 41 from the open side. The configuration of the holding unit 40 will be described in detail later.

  Further, a groove 39 for accommodating a plate spring 38 having a substantially “U” shape is formed in the top plate 14A of the upper case 14 and the bottom plate 16A of the lower case 16 between the holding portion 40 and the front wall 12A. (See FIG. 4). That is, the upper and lower ends of the base portion 38 </ b> A of the leaf spring 38 are fixedly disposed in the groove portion 39.

  The bifurcated tip portion 38B of the leaf spring 38 is engaged (pressed) with the outer peripheral surface 36C (see FIG. 3) of the upper and lower flange portions 36 of the leader pin 30, and the leader pin 30 is held by the holding portion 40 (see FIG. 3). The concave portion 41) is held. When the leader pin 30 enters and exits the holding portion 40, the tip end portion 38B of the leaf spring 38 is appropriately elastically deformed to allow the leader pin 30 to move.

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

  A shaft 52 is projected from the center of the rear end of the door 50, and a coil spring 58 is inserted 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 portion 62 that locks the rear end of the coil spring 58 inserted into the shaft 52.

  Accordingly, the door 50 is slidably supported on the support base 60 and the rear end of the coil spring 58 is locked to the locking portion 62, so that the door 50 is always urged by the urging force of the coil spring 58. The opening 18 is biased 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 is provided at the front end of the door 50 so as to project outward. The convex portion 56 engages with an opening / closing member (not shown) on the drive device side as the recording tape cartridge 10 is loaded into the drive device. Thereby, the door 50 is configured to be opened against the urging force of the coil spring 58.

  Next, the configuration of the holding unit 40 will be described in more detail. In addition, since the holding | maintenance part 40 is the same structure up and down, it mainly demonstrates the holding | maintenance part 40 by the side of the lower case 16 shown in FIG. 4, FIG. As shown in FIGS. 4 and 5, the holding portion 40 has a substantially U-shaped concave portion 41 that holds the outer surface 36 </ b> A (see FIG. 3) of the flange portion 36. At a position spaced apart by a predetermined distance in the height direction, when the leader pin 30 (flange portion 36) is held by the holding portion 40 (concave portion 41), a predetermined amount is exceeded on the inner surface 36B side of the flange portion 36 without contact. The overhang | projection part 44 to wrap is formed.

  The overhanging portion 44 is integrally formed with the upper case 14 and the lower case 16, but is flat so as not to be released from a mold (not shown) after forming (so as not to be a so-called undercut portion). It is formed by a movable core (not shown) having a substantially “U” shape (matching the shape of the overhanging portion 44) as viewed or viewed from the bottom. Therefore, when the upper case 14 and the lower case 16 are molded and then released from the mold, the movable core is removed, so that the upper case 14 and the lower case 16 have a plan view as shown in FIG. Alternatively, a substantially U-shaped through hole (core hole) 42 in the bottom view is formed.

  Further, in the plan view where the outer peripheral surface 36C of the flange portion 36 faces (contacts) around the recess 41 on the inner surface of the top plate 14A of the upper case 14 and the inner surface of the bottom plate 16A of the lower case 16 and around the through hole 42. A U-shaped inner wall surface 43 is formed, and an overhanging portion 44 is integrally extended from the leading end portion in the height direction of the inner wall surface 43 to the drawing side of the recording tape T. A substantially U-shaped cutout portion 44A that allows the main body portion 32 of the annular groove 35 portion is formed at a substantially central portion of the protruding portion 44 on the drawing side of the recording tape T.

  As shown in FIGS. 5 and 7, the interval W between the recessed portion 41 and the overhanging portion 44 is formed wider than the thickness D (see FIG. 3) of the flange portion 36, and the holding portion 40. On the upper case 14 side in which the leader pin 30 is accommodated and held, the inner surface 36B of the flange portion 36 and the outer surface 44B of the overhanging portion 44, and the outer surface 36A of the flange portion 36 and the concave portion 41 are interposed. The predetermined clearances L2 and L3 are formed respectively.

  Further, as shown in FIG. 7, the peripheral surface of the cutout portion 44 </ b> A of the overhang portion 44 and the side where the flange portion 36 is inserted are tapered surfaces 44 </ b> C having a predetermined angle by chamfering processing or fillet processing (R processing). It is said that. Thus, even when the leader pin 30 is tilted and returned to the holding portion 40 (see FIG. 7A), the flange portion 36 is accommodated without interfering with the overhanging portion 44 (not stacked). This is a configuration (see FIG. 7B).

  That is, by this, the leader pin 30 can be stably attached and detached even if the overhanging portion 44 is present. Note that it is desirable to leave a straight portion 44D on the peripheral surface of the cutout portion 44A. If such a straight portion 44D is left, the strength of the overhanging portion 44 can be ensured (the strength of the overhanging portion 44 can be maintained).

  Here, the relationship between the clearance between the leader pin 30 and the holding portion 40 will be described. As shown in FIG. 8, in a state where the leader pin 30 is accommodated and held in the holding portion 40, the outer surface 36 </ b> A of the flange portion 36 comes into contact with the concave portion 41 on the lower case 16 side due to gravity, and on the upper case 14 side. , Apart from the recess 41. That is, as shown in FIG. 7, a predetermined clearance L <b> 3 is formed between the outer surface 36 </ b> A of the flange portion 36 and the recess 41 on the upper case 14 side.

  On the other hand, on the lower case 16 side, as shown in FIG. 9, the clearance L <b> 1 between the inner surface 36 </ b> B of the flange portion 36 and the outer surface 44 </ b> B of the overhang portion 44 is an interval W between the recess 41 and the overhang portion 44. The value D is obtained by subtracting the thickness D of the flange portion 36 from the clearance C1 and is larger than the clearance C1 between the outer peripheral surface 36C of the flange portion 36 and the inner wall surface 43. The clearance C2 between the outer peripheral surface of the main body 32 and the inner peripheral surface of the notch 44A (the overhang portion 44) is also made larger than the clearance C1 between the outer peripheral surface 36C of the flange portion 36 and the inner wall surface 43. ing.

  Further, as shown in FIG. 6, the curvature of the inner wall surface 43 in plan view is the same as the curvature of the flange portion 36 in plan view (see FIG. 6A) or smaller (see FIG. 6). (See (B)). That is, the curvature radius of the inner wall surface 43 in plan view is the same as or larger than the curvature radius of the flange portion 36 in plan view.

  Here, furthermore, an example of the clearance of each part is shown using a concrete numerical value. First, as shown in FIG. 5, the interval W between the outer surface 44B of the overhanging portion 44 and the recess 41 is W = 0.9 mm, the plate thickness E of the overhanging portion 44 is E = 0.4 mm, The diameter of the wall surface 43 (twice the radius of curvature) R1 is R1 = 3.275 mm, and the diameter of the notch 44A (twice the radius of curvature) R2 is R2 = 1.75 mm.

  As shown in FIG. 3, the thickness D of the flange portion 36 of the leader pin 30 is D = 0.58 mm, the diameter of the flange portion 36 (twice the radius of curvature) r1 is r1 = 3.225 mm, the main body The diameter r2 of the area defined as the annular groove 35 of the portion 32 is r2 = 1.60 mm. The diameter r3 of the area to which the recording tape T of the main body 32 is attached is r3 = 1.50 mm.

  Accordingly, the clearance L1 is L1 = WD = 0.9 mm−0.58 mm = 0.32 mm. Incidentally, the clearance L2 is L2 = 0.20 mm, and the clearance L3 is L3 = 0.12 mm. The clearance C1 is C1 = (R1−r1) / 2 = (3.275 mm−3.225 mm) /2=0.05 mm / 2 = 0.025 mm, and the clearance C2 is C2 = (R2−r2). /2=(1.75 mm-1.60 mm) /2=0.15 mm / 2 = 0.075 mm. In each part, the clearances L1, C1, and C2 are defined in a portion where the draft is provided, in a state in which the draft is taken into account.

  Next, the operation of the recording tape cartridge 10 configured as described above will be described. In the recording tape cartridge 10 having the above-described configuration, the opening 18 is closed by the door 50 when not in use (when the recording tape cartridge 10 is not loaded into the drive device such as during storage or transportation). The recording tape T is wound around the reel hub 22 of the reel 20.

  When the recording tape T is used, the recording tape cartridge 10 is loaded into the drive device along the arrow A direction with the front wall 12A at the head. Then, first, the opening / closing member provided on the drive device side engages with the convex portion 56 of the door 50. In this state, when the recording tape cartridge 10 further moves in the arrow A direction, the opening / closing member moves the projection 56 relatively rearward against the urging force of the coil spring 58. Then, the door 50 from which the convex portion 56 projects is slid rearward in the groove portion 64 along the right wall 12B and opens the opening 18.

  Thus, when the recording tape cartridge 10 is loaded into the drive device at a predetermined depth and the opening 18 is completely opened, the recording tape cartridge 10 is lowered by a predetermined height, and the positioning member (not shown) of the drive device is moved to the lower case. 16 is inserted into a positioning hole (not shown) formed in 16. As a result, the recording tape cartridge 10 is accurately positioned at a predetermined position in the drive device, and further sliding (rearward movement) of the door 50 is restricted.

  Further, the lowering operation of the recording tape cartridge 10 causes the rotation shaft to relatively enter from the gear opening 46 and mesh the drive gear with the reel gear. Then, in a state where the drive gear and the reel gear are completely meshed, the reel plate is attracted and held by the magnetic force of the annular magnet provided inside the drive gear, so that the reel 20 has the reel gear with respect to the drive gear. While the meshing is maintained, the case 12 can rotate relative to the case 12.

  On the other hand, a drawing member provided in the drive device enters the case 12 from the opened opening 18, and grips and pulls out the leader pin 30 positioned and held by the holding unit 40. At this time, since the recording tape cartridge 10 is accurately positioned in the drive device, the drawing member can reliably engage the hook with the annular groove 35 of the leader pin 30.

  Thus, the leader pin 30 extracted from the opening 18 is accommodated in a take-up reel (not shown). Then, by rotating the take-up reel and the reel 20 synchronously, the recording tape T is sequentially drawn out from the case 12 while being taken up by the take-up reel, and is arranged along a predetermined tape path. Information is recorded or reproduced by a recording / reproducing head (not shown).

  When the recording tape cartridge 10 that has finished recording and reproducing information is ejected from the drive device, first, the recording tape T is rewound onto the reel 20 by the reverse rotation of the rotating shaft. When the recording tape T is rewound to the end of the reel 20, the leader pin 30 is held by the holding unit 40. At this time, the tip portion 38B of the leaf spring 38 is appropriately elastically deformed to allow the leader pin 30 to be accommodated in the holding portion 40. The overhanging portion 44 overlaps the flange portion 36 by a predetermined amount on the inner surface 36B side of the flange portion 36 in plan view.

  Thereafter, the recording tape cartridge 10 is raised to a predetermined height, and the positioning member is extracted from the positioning hole, and the rotary shaft is extracted from the gear opening 46, and the engagement of the drive gear with the reel gear is released. The recording tape cartridge 10 is moved in the direction opposite to the arrow A direction by an unillustrated ejecting mechanism. Then, with this movement, the door 50 slides in the closing direction of the opening 18 by the urging force of the coil spring 58 and completely closes the opening 18 (returns to the initial state). In this way, the recording tape cartridge 10 with the opening 18 closed is completely discharged from the drive device.

  Here, the operation of the holding unit 40 will be further described. As shown in FIG. 8, in the leader pin 30, the flange portions 36 provided at the upper and lower ends of the main body portion 32 are respectively between the inner surface of the top plate 14 </ b> A and the overhanging portion 44 of the upper case 14 and the lower case 16. It is held by the holding part 40 in a state of entering between the inner surface of the bottom plate 16A and the overhanging part 44. Therefore, even if an impact due to dropping or the like is applied to the vicinity of the opening 18 and the vicinity of the opening 18 is opened (so that the upper case 14 and the lower case 16 are separated from each other), the bending deformation is determined by the leader. It can be suppressed by the pin 30.

  That is, when the opening 18 is bent and deformed so that the vicinity of the opening 18 opens, the outer surface 44B side of the overhanging portion 44 is in pressure contact with the inner surface 36B side of the flange portion 36 of the leader pin 30, and thus the opening of the opening is suppressed by the leader pin 30. can do. Moreover, since the flange part 36 of the leader pin 30 is pressed by the overhang | projection part 44 by this, the detachment | leave from the holding | maintenance part 40 of the leader pin 30 is prevented.

  Further, when not used in the drive device, the overhanging portion 44 allows the main body portion 32 of the leader pin 30 by the cutout portion 44A having a substantially “U” shape in plan view, and the inner surface 36B of the flange portion 36. On the side, it overlaps with the flange portion 36 by a predetermined amount, so that the leader pin 30 is prevented from being tilted and detached from the holding portion 40. Therefore, as shown in FIG. 10, the leaf spring 38 that holds the leader pin 30 (flange portion 36) can be omitted.

  Further, in the leader pin 30 and the holding part 40, the clearances L1, C1, and C2 of the respective parts are defined as described above, so that an impact is applied to the case 12 by dropping or the like, and the leader pin 30 is pulled out. When attempting to tilt in a direction other than the direction, for example, in a direction substantially perpendicular to the pulling direction, the outer peripheral surface 36C of the flange portion 36 of the leader pin 30 collides (pressure contact) with the inner wall surface 43 formed on the holding portion 40. The inner surface 36B of the flange portion 36 does not contact (pressure contact) with the overhanging portion 44, and the main body portion 32 does not contact (pressure contact) with the overhanging portion 44. Therefore, there is no possibility that the overhanging portion 44 having the plate thickness E is damaged.

  Since the inner wall surface 43 formed on the holding portion 40 has relatively high rigidity, it can sufficiently withstand the pressing force even when the flange portion 36 collides (pressure contact). In particular, if the inner wall surface 43 is formed in an arc shape in plan view and the curvature of the inner wall surface 43 is the same as or smaller than the curvature of the flange portion 36, the rigidity of the inner wall surface 43 is further increased. Can do. When the curvature of the inner wall surface 43 is smaller than the curvature of the flange portion 36, when the leader pin 30 is accommodated in the holding portion 40 (recessed portion 41), the flange portion 36 is connected to the inner wall surface 43. It is possible to prevent interference with the drawing side end of the.

  In addition, as shown in FIG. 11, when the leaf springs 38 that hold down the leader pin 30 are provided vertically and separately, that is, the leaf springs 38 are separately provided on the upper case 14 and the lower case 16, respectively. When it is attached by caulking or the like, if the attaching and detaching operation of the leader pin 30 is repeated, the urging force of one of the upper and lower leaf springs 38 may be reduced, and the leader pin 30 may be tilted in the drawing direction.

  However, in this case, the inner surface 36B of the flange portion 36 can be received by the end portion (lower surface) of the overhang portion 44 on the inner wall surface 43 side (back side). That is, it is possible to prevent the leader pin 30 from tilting in the pull-out direction when not used in the drive device. In addition, since the edge part by the side of the inner wall surface 43 of the overhang | projection part 44 has comparatively high rigidity, even if the inner surface 36B of the flange part 36 collides (pressure contact), there is no possibility of damaging.

  Further, as described above, when the overhanging portion 44 is formed so as not to be an undercut portion (by a movable core), it is not necessary to provide a slide mechanism in the die, and the die configuration is complicated. There is nothing to do. That is, the configuration of the mold can be simplified, and there is no problem that the mold becomes expensive. However, in this case, since the through hole 42 is formed in the upper case 14 and the lower case 16, it is preferable to close the through hole 42 with a closing member such as a seal member (not shown). According to this, dustproofness in the case 12 can be ensured.

  Also, as shown in FIG. 12, the overhanging portion 44 is made a separate body, and after the upper case 14 and the lower case 16 are formed, the separated overhanging portion 44 is made into an inner surface of the top plate 14A by caulking, welding, or the like. In addition, it may be attached to the inner surface of the bottom plate 16A. With such a configuration, it is possible to prevent the through hole 42 from being formed, and thus it is possible to sufficiently ensure the dustproof property in the case 12.

  In addition, the overhang | projection part 44 is not limited to what is shape | molded by a movable core, or what is attached as a different body, As shown in FIG. 13, a slide mechanism is provided in a metal mold | die and an undercut is carried out. The part may be integrally formed. The overhanging portion 44 is desirably provided in both the upper case 14 and the lower case 16, but may be provided in only one of the upper case 14 and the lower case 16.

Schematic perspective view of recording tape cartridge Outline exploded perspective view of recording tape cartridge Leader pin schematic front view Schematic perspective view showing the holding part Schematic front view showing the holding part (A) Schematic bottom view showing a through hole having the same curvature as the flange portion, (B) Schematic bottom view showing a through hole having a curvature smaller than that of the flange portion. (A) Schematic side sectional view showing a state in which the leader pin is inclined and returned to the holding portion, (B) Schematic side sectional view showing a state in which the leader pin is held by the holding portion Schematic front view showing a state in which the leader pin is held by the holding unit Partially enlarged schematic front view showing a state in which the leader pin is held in the holding part Schematic perspective view showing the holding part when the spring holding the leader pin is omitted Schematic perspective view showing the holding portion when the spring holding the leader pin is separated up and down Schematic perspective view showing the holding portion when the overhanging portion is a separate body Schematic perspective view showing the holding part when the overhang part is an undercut part

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Recording tape cartridge 12 Case 14 Upper case 16 Lower case 18 Opening 20 Reel 30 Leader pin 32 Main body part 34 Small flange part 35 Annular groove 36 Flange part 38 Leaf spring 39 Groove part 40 Holding part 41 Recessed part 42 Through-hole 43 Inner wall surface 44 Tension Exit 50 door

Claims (8)

A case that is composed of an upper case and a lower case, and that houses a single reel on which a recording tape is wound; and
A leader pin that is attached directly or via a leader tape to the end of the recording tape and has flange portions formed at both ends;
An opening formed in the case for pulling out the leader pin;
A holding part that is formed in the upper case and the lower case and holds the flange part of the leader pin in the vicinity of the opening;
An overhang portion that is formed on at least one of the holding portions and overlaps the flange portion in a non-contact manner on the inner surface side of the flange portion when the leader pin is held by the holding portion;
A wall surface formed on the holding portion and facing the peripheral surface of the flange portion when the leader pin is held by the holding portion;
With
When the leader pin is tilted, the inner surface of the flange portion and the projecting portion are arranged such that the peripheral surface of the flange portion contacts the wall surface before the inner surface of the flange portion contacts the projecting portion. And a clearance between the peripheral surface of the flange portion and the wall surface is defined. A case that is composed of an upper case and a lower case, and that houses a single reel on which a recording tape is wound; and
A leader pin that is attached directly or via a leader tape to the end of the recording tape and has flange portions formed at both ends of the main body,
An opening formed in the case for pulling out the leader pin;
A holding part that is formed in the upper case and the lower case and holds the flange part of the leader pin in the vicinity of the opening;
An overhang portion that is formed on at least one of the holding portions and overlaps the flange portion on the inner surface side of the flange portion when the leader pin is held by the holding portion;
A wall surface formed on the holding portion and facing the peripheral surface of the flange portion when the leader pin is held by the holding portion;
With
When the leader pin is tilted, before the main body part contacts the overhanging part, the peripheral surface of the flange part is in contact with the wall surface between the main body part and the overhanging part. A recording tape cartridge characterized in that a clearance and a clearance between a peripheral surface of the flange portion and the wall surface are defined. A case that is composed of an upper case and a lower case, and that accommodates a reel on which a recording tape is wound;
A leader pin that is attached directly or via a leader tape to the end of the recording tape and has flange portions formed at both ends of the main body,
An opening formed in the case for pulling out the leader pin;
A holding part that is formed in the upper case and the lower case and holds the flange part of the leader pin in the vicinity of the opening;
An overhang portion that is formed on at least one of the holding portions and overlaps the flange portion in a non-contact manner on the inner surface side of the flange portion when the leader pin is held by the holding portion;
A wall surface formed on the holding portion and facing the peripheral surface of the flange portion when the leader pin is held by the holding portion;
With
When the leader pin is tilted, before the inner surface of the flange portion contacts the overhanging portion and before the main body portion contacts the overhanging portion, the peripheral surface of the flange portion is the wall surface. The clearance between the inner surface of the flange portion and the overhang portion, the clearance between the main body portion and the overhang portion, and between the peripheral surface of the flange portion and the wall surface A recording tape cartridge characterized by a clearance. A case that is composed of an upper case and a lower case, and that houses a single reel on which a recording tape is wound; and
A leader pin that is attached directly or via a leader tape to the end of the recording tape and has flange portions formed at both ends;
An opening formed in the case for pulling out the leader pin;
A holding part that is formed in the upper case and the lower case and holds the flange part of the leader pin in the vicinity of the opening;
An overhanging portion that is attached to at least one of the holding portions and overlaps the flange portion in a non-contact manner on the inner surface side of the flange portion when the leader pin is held by the holding portion;
A wall surface formed on the holding portion and facing the peripheral surface of the flange portion when the leader pin is held by the holding portion;
With
When the leader pin is tilted, the inner surface of the flange portion and the projecting portion are arranged such that the peripheral surface of the flange portion contacts the wall surface before the inner surface of the flange portion contacts the projecting portion. And a clearance between the peripheral surface of the flange portion and the wall surface is defined. A case that is composed of an upper case and a lower case, and that houses a single reel on which a recording tape is wound; and
A leader pin that is attached directly or via a leader tape to the end of the recording tape and has flange portions formed at both ends of the main body,
An opening formed in the case for pulling out the leader pin;
A holding part that is formed in the upper case and the lower case and holds the flange part of the leader pin in the vicinity of the opening;
An overhanging portion that is attached to at least one of the holding portions and overlaps the flange portion on the inner surface side of the flange portion when the leader pin is held by the holding portion;
A wall surface formed on the holding portion and facing the peripheral surface of the flange portion when the leader pin is held by the holding portion;
With
When the leader pin is tilted, before the main body part contacts the overhanging part, the peripheral surface of the flange part is in contact with the wall surface between the main body part and the overhanging part. A recording tape cartridge characterized in that a clearance and a clearance between a peripheral surface of the flange portion and the wall surface are defined. A case that is composed of an upper case and a lower case, and that houses a single reel on which a recording tape is wound; and
A leader pin that is attached directly or via a leader tape to the end of the recording tape and has flange portions formed at both ends of the main body,
An opening formed in the case for pulling out the leader pin;
A holding part that is formed in the upper case and the lower case and holds the flange part of the leader pin in the vicinity of the opening;
An overhanging portion that is attached to at least one of the holding portions and overlaps the flange portion in a non-contact manner on the inner surface side of the flange portion when the leader pin is held by the holding portion;
A wall surface formed on the holding portion and facing the peripheral surface of the flange portion when the leader pin is held by the holding portion;
With
When the leader pin is tilted, before the inner surface of the flange portion contacts the overhanging portion and before the main body portion contacts the overhanging portion, the peripheral surface of the flange portion is the wall surface. The clearance between the inner surface of the flange portion and the overhang portion, the clearance between the main body portion and the overhang portion, and between the peripheral surface of the flange portion and the wall surface A recording tape cartridge characterized by a clearance. The said wall surface is formed in planar view circular arc shape, and the curvature of this wall surface is the same as the curvature of the said flange part, or is formed smaller than it, The any one of Claims 1-6 characterized by the above-mentioned. The recording tape cartridge according to Item. The clearance between the inner surface of the flange portion and the protruding portion is defined so that the inner surface of the flange portion contacts the protruding portion when the leader pin is tilted in the pulling-out direction. The recording tape cartridge according to any one of claims 1 to 7.

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