JP2003208775A - Mounting arrangement for leader pin spring in magnetic tape cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting arrangement for a leader pin spring in a magnetic tape cartridge capable of accurately positioning the leader pin spring and smoothly fitting the leader pin spring to a bottom half or a top half. <P>SOLUTION: A support pin 1H is projected from an inner face of the top half or the bottom half 1A and a through-hole 22a fitted to the support pin 1H is formed to the leader pin spring 20, the support pin 1H is fitted to the through-hole 22a to fit the leader pin spring 20 to the top half or the bottom half 1A in the mounting arrangement. The mount device 24 for the leader pin spring is provided with: a support means 25 for supporting the leader pin spring 20; a guide pin 26 inserted to the through-hole 22a of the leader pin spring 20; and a movement means 27 for moving the leader pin spring 20 from the guide pin 26 to the support pin 1H while the guide pin 26 is set coaxial to the support pin 1H. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for attaching a leader pin spring in a magnetic tape cartridge. 2. Description of the Related Art Generally, in a magnetic tape cartridge used as an external recording medium for data backup such as a computer, a single reel on which a magnetic tape is wound is a substantially square having a lower half and an upper half. The cartridge is rotatably accommodated in a flat cartridge case. When using this magnetic tape cartridge, the tape pulling mechanism of the recording / reproducing device pulls out the magnetic tape from the cartridge case, and winds the drawn magnetic tape on the reel provided in the recording / reproducing device, thereby running the magnetic tape. Let Therefore, a magnetic tape cartridge containing a single reel of this type is provided with an outlet for pulling out the tip of the magnetic tape on the side wall of the cartridge case, and the tip of the magnetic tape or the leader tape connected thereto The leader pin with which the tape drawing mechanism is engaged is fixed by a clip. A leader pin spring is attached to the lower half or the upper half in order to apply a predetermined load to the leader pin. Various configurations have been adopted as conventional leader pin springs, and the main classification is that the both ends of the leader pin are fixed with a single leader pin spring, and the integrated type is attached to either the lower half or the upper half. A split type in which a leader pin spring is attached to each of the lower half and the upper half is known. For example, as an example of a split type leader pin spring, a cylindrical fixing portion is provided on one end side of an elongated spring foot portion, and a locking portion for locking a leader pin is formed on the other end side. Consists of. A support pin projects from the lower half or the upper half, and the leader pin spring is attached to the lower half or the upper half by fitting the through hole of the fixed portion into the support pin. When the leader pin spring is automatically attached to the lower half or the upper half in the above attachment mode, the leader pin spring is accurately positioned and the through hole with respect to the support pin of the lower half or the upper half is provided. Smooth movement is required. An object of the present invention is to provide a leader pin spring mounting device in a magnetic tape cartridge that enables accurate positioning of the leader pin spring and smooth attachment to the lower half or upper half of the leader pin spring. In order to solve the above-mentioned problems, the present invention is provided with a magnetic tape winding outlet wound on a reel provided on the side wall portion of the cartridge case across the upper half and the lower half. The magnetic tape cartridge is provided with a leader pin spring for locking a leader pin fixed to an end of the magnetic tape or a leader tape connected to the magnetic tape in the vicinity of the inside of the outlet. A support pin projects from the inner surface of the half, and a through hole is formed in the leader pin spring to fit the support pin. By fitting the through hole to the support pin, the leader pin spring is moved to the upper half. Alternatively, an attachment device for attaching to the lower half, the supporting means for supporting the leader pin spring, and the leader pin spring A magnetic tape cartridge comprising: a guide pin that is inserted into a through hole; and a moving unit that moves the leader pin spring from the guide pin side to the support pin side in a state where the guide pin is coaxial with the support pin. A device for attaching a leader pin spring was used. With this configuration, the guide pin is inserted into the through hole while the leader pin spring is supported, so that the positioning accuracy of the leader pin spring at the time of attachment can be increased. Furthermore, when the leader pin spring moves to the support pin side, it moves to the support pin side while being guided by the guide pin, so that it can move smoothly without shaking. In addition, a housing is provided in which the guide pin is movable so as to be movable in the axial direction and so that one end of the guide pin protrudes in a normal state, and a through hole of the leader pin spring is fitted to the guide pin. The housing is moved, the guide pin is abutted against the support pin, the guide pin is retracted into the housing by a pressing reaction force from the support pin, and the leader pin spring is pressed by the edge of the housing to It is desirable to provide an apparatus for attaching a leader pin spring in a magnetic tape cartridge configured to move to the support pin side. According to this configuration, the portion around the through hole of the leader pin spring can be forcibly pressed with a simple structure. Therefore, the leader pin spring can be fitted and moved more smoothly from the guide pin side to the support pin side. Furthermore, it is desirable to provide a leader pin spring mounting device in a magnetic tape cartridge having a structure in which the housing is provided with an elastic member for biasing the guide pin in a direction protruding from the housing. According to this configuration, the movable mechanism of the guide pin can have a simple structure with a small number of members. DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing components of a magnetic tape cartridge. The magnetic tape cartridge is a so-called LTO.
As shown in FIG. 1, a single reel 2 in which a magnetic tape MT is wound in advance inside a cartridge case 1 divided into a lower half 1A and an upper half 1B, as shown in FIG. A lock plate 3 and a compression coil spring 4 for locking the rotation of the reel 2, a release pad 5 for releasing the locked state of the reel 2, and a lower half 1A
A sliding door 6 that opens and closes a magnetic tape outlet 1C formed on one side wall of the cartridge case 1 across the upper half 1B, and a torsion coil spring 7 that urges the sliding door 6 to a closed position of the magnetic tape outlet 1C. Erasing prevention nail 8,
The cartridge memory chip 9 and the like are incorporated. The reel 2 has a cup-shaped hub 2A that opens to the upper half 1B side in the center, and this cup-shaped hub 2A.
The release pad 5, the lock plate 3, and the compression coil spring 4 are sequentially assembled therein. A flange 2B is welded to the opening side of the cup-shaped hub 2A of the reel 2.
The end of the magnetic tape MT wound around the reel 2 is
It is wound around a leader pin 10 and fixed with a clip 11. Hereinafter, the leader pin spring 20 is moved to the lower half 1A.
The case of attaching to the side will be described. The leader pin spring 20 is also attached to the upper half 1B side so as to be vertically symmetrical, but the description thereof is omitted below. 2 shows a magnetic tape outlet 1C in the lower half 1A of FIG.
FIG. 3 is an enlarged plan view of the vicinity and FIG. 2 and 3, in the vicinity of the inside of the magnetic tape outlet 1C, that is, the magnetic tape outlet 1 on the bottom surface 1D.
A leader pin storage portion 1E that presents a substantially U-shaped recess for storing the end portion of the leader pin 10 at a portion facing C.
Is formed. The leader pin spring 20 is attached to the lower half 1A in such a manner that the mountain-shaped locking portion 23 projects from the side in order to apply a predetermined load to the leader pin 10 received in the leader pin storage portion 1E. The leader pin spring 20 is a plate spring formed by bending a thin plate material. The leader pin spring 20 is a fixed portion 22 that is fixed to the lower half 1A, and a locking portion 23 that is a portion that locks the leader pin 10. It is composed of an elongated spring leg 21 extending from the fixed portion 22 side with an appropriate length so as to cause a predetermined elastic displacement in the locking portion 23. In the present embodiment, one end side of the elongated and rectangular plate material is rounded into a cylindrical shape, and this cylindrical portion is used as the fixing portion 22, while the other end side is bent twice in a zigzag shape to form a mountain shape, This angle-shaped part is used as the locking part 23. The leader pin spring 20 is disposed on the lower half 1A with its plate surface perpendicular to the bottom surface 1D of the lower half 1A. Specifically, since the locking portion 23 is configured to hold the end portion of the leader pin 10, the leader pin spring 20 is stored in a leader pin spring that is connected to the lower surface of the bottom surface 1D, that is, the same surface as the leader pin storage portion 1E. It is arranged on the part 1F (see FIGS. 3 and 4). The leader pin spring storage portion 1F is a side wall 1 of the lower half 1A.
It is formed as an elongated surface portion along G. The end portion of the leader pin 10 is held by the chevron-shaped portion of the locking portion 23 projecting toward the leader pin storage portion 1E. A support pin 1H protrudes from a portion of the leader pin spring storage portion 1F located farthest from the magnetic tape outlet 1C, that is, a portion where the fixing portion 22 of the leader pin spring 20 is located. In the present embodiment, the support pin 1H has a cylindrical shape. The leader pin spring 20 forms a through hole 22a penetrating in the vertical direction in the cylindrical fixing portion 22, and the leader pin spring 20 is attached to the lower half 1A side by fitting the through hole 22a to the support pin 1H. . The present invention relates to an attachment device that enables the leader pin spring 20 to be accurately attached to the lower half 1A side in such an attachment manner. The support means 25 for supporting the leader pin spring 20 and the through hole 22a of the leader pin spring 20 are provided. A guide pin 26 to be inserted into the guide pin 26 and a moving means 27 (see FIG. 5) for moving the leader pin spring 20 from the guide pin 26 side to the support pin 1H side in a state where the guide pin 26 is coaxial with the support pin 1H. Is provided. As shown in FIG. 4 or 5, the attachment device 24 includes a grip portion 25 a for gripping the leader pin spring 20. The gripping portion 25a constitutes the support means 25. The gripping portion 25a is configured, for example, as a mode in which the locking portion 23 and the spring foot portion 21 of the leader pin spring 20 are sandwiched from both sides. In this case, the gripping portion 25a is opened and closed by using air pressure, electromagnetic solenoid, or the like. The leader pin spring 20 is gripped or the gripped state is released. The guide pin 26 is a member that moves integrally with the support means 25 (gripping portion 25a) via, for example, the main body portion 28. In this embodiment, the guide pin 26 has a cylindrical shape and is shown in FIG.
As shown, the leader pin spring 20 is held by the gripping portion 25a.
In the state of being gripped by, the fitting part 22 is inserted into the through hole 22a from above. The outer diameter of the guide pin 26 is the through hole 22.
The dimension is slightly smaller than the inner diameter of a. Thus, in the state where the leader pin spring 20 is gripped, the through hole 22a
By inserting the guide pin 26 into the guide pin 26, the positioning accuracy of the leader pin spring 20 at the time of attachment can be increased. In the state where the guide pin 26 is coaxial with the support pin 1H, for example, the main body 28 is lowered, so that the leader pin spring 20 has its fixed portion 22 moved from the guide pin 26 to the support pin 1H. It is placed on the leader pin spring storage 1F of the lower half 1A. The lowering means for lowering the main body portion 28 constitutes the moving means 27. When the leader pin spring 20 moves to the support pin 1H side, it moves to the support pin 1H side while being guided by the guide pin 26, so that it can move smoothly without being shaken. Thereafter, the gripping part 2
The attachment of the leader pin spring 20 to the lower half 1A is completed by lifting the main body 28 by releasing the gripping by 5a. In order to increase the positioning accuracy of the leader pin spring 20, it is desirable to make the gap between the inner peripheral surface of the through hole 22a of the leader pin spring 20 and the outer peripheral surfaces of the guide pin 26 and the support pin 1H as small as possible. In particular, in the relationship between the support pin 1H and the through hole 22a, a state in which press fitting is achieved is preferable. However, when the gap setting between the peripheral surfaces is extremely small, when the leader pin spring 20 moves from the guide pin 26 to the support pin 1H, the through hole 22
There is a possibility that the inner peripheral surface side of “a” and the outer peripheral surface sides of the guide pin 26 and the support pin 1H are caught, and smooth movement cannot be performed. In order to solve this problem, in the present embodiment, the housing 2 in which the guide pin 26 is housed so as to be movable in the axial direction and so that one end of the guide pin 26 protrudes in a normal state.
9 with the through hole 22a of the leader pin spring 20 fitted to the guide pin 26, the housing 29 is moved to the support pin 1H side, the guide pin 26 is abutted against the support pin 1H, and the pressure from the support pin 1H is pressed. The guide pin is retracted into the housing 29 by the reaction force, and the portion around the through hole 22a of the leader pin spring 20 is pressed by the edge of the housing 29 and moved to the support pin 1H side. The housing 29 is, for example, a member having a cylindrical shape with one end side having no bottom. In this embodiment, the housing 29 is attached to the main body 28 with the bottom side being a lower end. The inside of the housing 29 has a known structure,
A guide pin 26 is held so as to be slidable in the vertical direction. In the present embodiment, the housing 29 is provided with an elastic member that urges the guide pin 26 in a direction protruding from the housing 29. An example of the elastic member is a compression coil spring 30. The guide pin 26 is normally in a state in which one end side (lower end side) protrudes from the opening on the bottom surface of the housing 29 by the urging force of the compression coil spring 30. The operation of the mounting device 24 will be described with reference to FIG. 5. In the state (a), the gripping portion 25a grips the leader pin spring 20, and the through hole 22a of the fixing portion 22 is fitted to the guide pin 26. Indicates the state. The attachment device 24 grips the leader pin spring 20 with the gripping portion 25a in this manner at the place where the other leader pin spring 20 is supplied, and in this state, the guide pin 26 is coaxial with the support pin 1H as shown in FIG. It is comprised so that it may move to. When the main body 28 is lowered from the state (a), as shown in (b), the lower end surface of the guide pin 26 abuts against the upper end surface of the support pin 1H and presses the support pin 1H side, At this time, the guide pin 26 is retracted into the housing 29 against the urging force of the compression coil spring 30 by the pressing reaction force received from the support pin 1H. At the same time, the edge around the opening on the bottom surface of the housing 29 is aligned with the leader pin spring 20.
By forcibly pressing the periphery of the through-hole 22a, that is, the upper edge of the fixing portion 22, the leader pin spring 20 moves smoothly without being caught from the guide pin 26 side to the support pin 1H side. Of course, as mentioned above,
When the leader pin spring 20 moves to the support pin 1H side, the leader pin spring 20 moves to the support pin 1H side while being guided by the guide pin 26, so that the smooth movement without blurring can be achieved. . Then, as shown in (c), with the leader pin spring 20 placed on the leader pin spring storage portion 1F of the lower half 1A, the gripping by the gripping portion 25a is released and the main body portion 28 is lifted to raise the lower half. The attachment of the leader pin spring 20 to 1A is completed (state (d)). In this state (d), the upper end portion of the support pin 1H slightly protrudes from the fixing portion 22, but this protruding portion is formed around the upper edge of the fixing portion 22 by a so-called caulking process or the like by crushing in a later step. As a result, the leader pin spring 20 is fixed to the lower half 1A. As described above, the housing 29 is provided so that the guide pin 26 is movable in the axial direction and normally protrudes at one end thereof, and the guide pin 26 has the through hole 22a of the leader pin spring 20 therein. In the engaged state, the housing 29 is moved to guide the guide pin 2
6 is abutted against the support pin 1H, the guide pin 26 is retracted into the housing 29 by the pressing reaction force from the support pin 1H, and the leader pin spring 20 is pressed by the edge of the housing 29 to move to the support pin 1H side. Then, the leader pin spring 20 can be connected to the guide pin 2 with a simple structure.
It can be smoothly moved from the 6 side to the support pin 1H side. In addition, the guide pin 26 is mounted on the housing 29.
By providing an elastic member (compression coil spring 30) that urges the guide pin 26 in a direction protruding from the housing 29, the movable mechanism of the guide pin 26 can be made simple and reliable. The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the described embodiments, and the design and design of each component can be changed as appropriate without departing from the spirit of the present invention. Is possible. According to the present invention, the positioning accuracy of the leader pin spring during attachment can be improved, and the leader pin spring can be smoothly attached to the support pin with a simple structure. Therefore, the mounting device is excellent in the assembly efficiency of the magnetic tape cartridge.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing components of a magnetic tape cartridge. FIG. 2 is an enlarged perspective view of the vicinity of the magnetic tape outlet in the lower half. FIG. 3 is an enlarged plan view of the vicinity of a magnetic tape outlet in the lower half. FIG. 4 is an enlarged perspective view showing a leader pin spring and a support pin. FIG. 5 is an explanatory side view of a leader pin spring attachment device. [Explanation of Symbols] MT Magnetic Tape 1 Cartridge Case 1A Lower Half 1B Upper Half 1C Magnetic Tape Exit 1H Support Pin 2 Reel 10 Leader Pin 20 Leader Pin Spring 22a Through Hole 24 Mounting Device 25 Supporting Means 26 Guide Pin 27 Moving Means 29 Housing 30 Compression Coil spring (elastic member)

Claims (1)

1. An outlet for a magnetic tape wound on a reel is provided in a side wall portion of a cartridge case across an upper half and a lower half, and in the vicinity of the inside of the outlet, The present invention relates to a magnetic tape cartridge provided with a leader pin spring for locking a leader pin fixed to an end portion of a magnetic tape or a leader tape connected thereto, and a support pin protrudes from the inner surface of the upper half or the lower half. In addition, the leader pin spring is formed with a through hole that fits the support pin, and the leader pin spring is attached to the upper half or the lower half by fitting the through hole to the support pin, A support means for supporting the leader pin spring; a guide pin inserted into a through hole of the leader pin spring; Pins in a state where the coaxial with respect to the support pin, the mounting device of Ridapinbane in the magnetic tape cartridge characterized in that it comprises a moving means for moving the support pins side the Ridapinbane from said guide pin side.