JPH11232828A - Magnetic tape cartridge utilizing single reel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the tape pulling out operation in a magnetic tape cartridge utilizing a single reel, whereon a pin-shaped tape pulling out means is connected to the tape supplying end, by allowing the tape pulling out means of the standby state so as to be always accurately positioned and held. SOLUTION: A tape pulling out port 4 is opened at the corner part of the main body 1 of a case. A pair of shaft holding parts 15 is provided on the internal upper and lower parts of the tape pulling out port 4, and engaging shaft parts 11 of the upper/lower ends of the tape pulling out means 7 are caught and positioned by both of the shaft holding parts 15. The shaft holding parts 15 are provided so as to open toward the side of the tape pulling out port 4. The tape pulling out port 4 is openable/closable by a freely sliding cover 5. By utilizing this cover 5, the engaging shaft parts 11 caught by the shaft holding parts 15 are made to hold so as unable to fall off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a single-reel type magnetic tape cartridge represented by a magnetic recording medium of a data recorder for a computer.

[0002]

2. Description of the Related Art In a magnetic tape cartridge of this type, a tape pull-out tool is connected to a pay-out end of a magnetic tape, and the tape pull-out tool is captured by a capturing device on a tape drive side. Withdrawal operation from. The tape puller is formed of a plastic sheet having a self-retaining property (Japanese Patent Laid-Open No. 8-63940).
And those formed of plastic blocks (Japanese Unexamined Patent Publication No. Sho 62
-66486).

[0003]

In a tape puller formed of a plastic sheet, the free end of the sheet is exposed to the tape pull-out port in a state in which the free end of the sheet is cantilevered when the entire amount of the magnetic tape is rewound into the case body. Further, the tape puller itself can be elastically deformed in the sheet thickness direction. Therefore, it is difficult to accurately position and hold the tape puller. This means that the capturing device may fail to capture the tape pull-out device in the use state.

[0004] A tape puller formed of a plastic block does not deform itself and holds a posture during standby in a case body, so that the position holding precision is higher than that of the tape puller described above. However, the tape pull-out tool can move slightly in the standby state, and the tape pull-out tool is always exposed to the peripheral surface of the case. Therefore, it is difficult to obtain sufficient reliability. Since the loading pocket is opened to operate the tape puller, there is also a problem in a place where dust and the like easily enter into the case from there.

[0005] In order to solve such a problem relating to the tape pull-out tool, the present inventors have formed a tape pull-out tool with a pin, and set the tape pull-out tool in a tape pull-out opening provided in a peripheral side wall of a case body. We are developing a form to hold.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic tape cartridge provided with a pin-shaped tape puller so that the tape puller in a standby state can always be accurately held in position. And to accurately position and fix the tape puller in the standby state even during long-term use. Another object of the present invention is to use a lid that opens and closes a tape pull-out opening to prevent the tape pull-out tool in a standby state from coming out and rattling, thereby holding the tape pull-out tool in a standby state. An object of the present invention is to reduce the number of components of a magnetic tape cartridge as compared with a case where a structure is separately provided, and to reduce the cost required for manufacturing by that much. Still another object of the present invention is to make use of the fact that the lid and the tape pull-out tool are engaged with each other so that the closed lid can be held at the closed position, and the lid is careless when handling the magnetic tape cartridge. The purpose of this is to reliably prevent the opening to the public.

[0007]

As shown in FIG. 2, a magnetic tape cartridge according to the present invention comprises a box-shaped case body 1 and a single reel 2 on which a tape 3 is wound. A pin-shaped tape puller 7 at the feeding end of the tape 3
Are connected. A tape outlet 4 for pulling out the tape puller 7 is opened in the peripheral side wall of the case body 1. Lid 5 for closing tape outlet 4 when not in use
Are slidably supported by the case body 1. On the inner surface of the upper wall and the inner surface of the bottom wall of the case main body 1 facing the tape outlet 4, a shaft holding portion 15 for receiving and positioning and holding the engaging shaft portions 11 provided at the upper and lower ends of the tape puller 7 is provided. The shaft holding portion 15 is disposed adjacent to the inner surface of the lid 5 that closes the tape outlet 4 and opens toward the tape outlet 4. Engaging shaft portion 11 housed in shaft holding portion 15
Is held undetachable by the lid 5.

[0008] Specifically, the shaft holding portion 15 is formed as a shallow concave portion. A pressing piece 23 for holding the tape puller 7 non-movably in cooperation with the shaft holding portion 15 is provided on the inner surface of the lid 5 to protrude. As shown in FIG. 4, the tape pull-out device 7 includes a connecting shaft portion 8 around which the tape 3 is wound and connected, an operation shaft portion 10 provided above and below the connecting shaft portion 8, and a larger diameter than the operation shaft portion 10. And an engagement shaft portion 11.

[0009]

When the tape puller 7 is housed inside the case body 1, the engaging shaft portions 11 at the upper and lower ends thereof are provided on the shaft holding portion 1 provided on the inner surfaces of the case upper wall and the case bottom wall.
It is received and held at 5. Further, the lid 5 for closing the tape outlet 4 blocks the side of the entrance 18 to the shaft holding portion 15 to prevent the engaging shaft portion 11 from coming out of the shaft holding portion 15 and position and hold the tape pulling tool 7. .

Therefore, the tape puller 7 can be positioned and held more accurately and reliably than a conventional magnetic tape cartridge. Since the lid 5 is used to prevent the tape pull-out tool 7 from running out, the number of components can be reduced by that much, and the tape pull-out tool 7 when not in use is exposed to the outer surface of the case via the tape pull-out port 4. Can be prevented. No dust or the like enters through the tape outlet 4.

A pressing piece 23 is provided on the inner surface of the lid 5, and the engaging shaft 11 is sandwiched and held between the pressing piece 23 and the shaft holding portion 15, so that the tape puller 7 is held in a standby state without rattling. it can. When the lid 5 is closed, if the pressing piece 23 gets over the engagement shaft portion 11 and adopts a shaft holding structure that sandwiches and holds the peripheral surface thereof, it is necessary to prevent the lid 5 from opening and moving carelessly. As long as there is no clear intention of the user, the tape outlet 4 can be kept closed.

[0012]

1 to 5 show a single reel type magnetic tape cartridge according to an embodiment of the present invention. In FIG. 2, the magnetic tape cartridge has a square box-shaped case main body 1 in which upper and lower cases 1a and 1b are joined together in a lid-like manner.
The tape 3 is wound around one reel 2 disposed inside the case body 1. A tape outlet 4 is opened at one side end of the front wall of the case body 1 and can be opened and closed by a slidable lid 5. The lid 5 is slidably opened and closed along guide grooves 30 provided in the upper and lower cases 1a and 1b, and is closed and biased by a spring.

In order to pull out the tape 3 wound around the reel 2 to the outside of the case, a tape pull-out tool 7 is connected to a pay-out end of the tape 3. 4. In FIG.
Is formed of a metal pin-shaped turning product, and the most of the vertical height is occupied by the small diameter connecting shaft portion 8, and flange-shaped thin section walls 9 are formed on the upper and lower portions of the connecting shaft portion 8, respectively. An operating shaft portion 10 and an engaging shaft portion 11 are integrally formed above and below the partition wall 9. The operating shaft 10 has the same diameter as the connecting shaft 8, and the engaging shaft 11 matches the diameter of the partition wall 9.
The end of the tape 3 is wound around the connecting shaft portion 8 in a loop shape, a C-shaped buffer 12 is fitted around the outer surface of the loop portion, and a C-shaped clamp formed of a thin metal plate is formed on the buffer 12. 13
Is externally fitted to connect the tape puller 7 to the tape 3 (see FIG. 1). The buffer body 12 includes a clamp 13
The tape 3 is interposed in order to prevent the tape 3 from coming into contact with the circumferential edge of the tape and breaking the tape.

As shown in FIG. 3, the inner surface of the upper case 1a and the bottom wall of the lower case 1b are used to position and hold the tape puller 7 when not in use in an upright position inside the case of the tape outlet 4. Each of the inner surfaces is provided with a shaft holding portion 15 that receives the peripheral surface of each engagement shaft portion 11. In FIG.
The shaft holding portion 15 of the lower case 1b is formed such that the bottom wall of the case is shallowly concaved in a U-shape, and furthermore, a back end wall 16 and a pair of left and right side walls 17 are bulged along the periphery of the dent. The doorway 18 is opened toward. A downwardly inclined vertical guide surface 19 is provided between the front edge of the shaft holding portion 15 and the opening edge of the tape outlet 4. At the end of the side wall 17 on the side of the entrance 18, an introduction guide surface 20 having a flared shape is provided. Upper case 1
a on the inner surface of the upper wall, a shaft holder 15 similar to that of the lower case 1b.
The vertical guide surface 19 is provided symmetrically in the vertical direction. The distance between the upper and lower shaft holding portions 15 is set slightly larger than the vertical length of the tape puller 7.

Tape puller 7 received by shaft holder 15
However, in order to prevent the tape from coming out of the case through the tape outlet 4, the lid 5 is used to receive and hold the outer peripheral surface of the engagement shaft portion 11. For this purpose, the front-rear dimension from the opening surface of the entrance 18 to the rear end wall 16 of the shaft holding portion 15 is set to be equal to or slightly larger than the diameter dimension of the engaging shaft portion 11, and the opening surface of the entrance 18 is closed. The opening / closing trajectory on the inner side of 5 is exposed.

In use, when the magnetic tape cartridge is loaded into the tape drive with the side of the case side wall 21 as a start end, the lid 5 is opened and the tape draw-out opening 4 is opened. At the same time, the reel lock that has prevented the idle rotation of the reel 2 is released. In this state, the catcher on the tape drive side enters the case from the tape pull-out port 4, catches and engages the upper and lower operation shafts 10 of the tape pull-out tool 7, and pulls out the tape 3 through the tape pull-out tool 7. Then, the tape drawer 7 is delivered to the take-up reel on the tape drive side. When the recording or reading of the data on the tape 3 is completed, the tape 3 is rewound on the reel 2. The tape pull-out tool 7 is engaged and captured again by the capturing tool, and is housed in the case body 1 in the original state.

While the tape puller 7 supported by the catcher is returned and housed in the tape outlet 4, the upper and lower end surfaces of the engaging shaft 11 are guided by the upper and lower vertical guide surfaces 19 so that the tape puller 7 is in the vertical position. The deviation is corrected. The engagement shaft portion 11 is guided by the introduction guide surfaces 20 on both sides of the entrance 18, is correctly accommodated in the shaft holding portion 15, and is positioned and held in the front-rear and left-right directions.
Thereafter, by pulling out the magnetic tape cartridge from the tape drive, the lid 5 is closed and slid by the urging force of the spring 6, and the tape outlet 4 is closed.

When the lid 5 is completely closed, FIG.
The entrance 18 of the shaft holder 15 is blocked by the inner wall of the lid 5 as shown in FIG. Therefore, even if the tape 3 has slackened, the tape pull-out tool 7 does not fall out of the shaft holding portion 15, and the tape pull-out tool 7 can be properly positioned and held until the next use opportunity. Even when the magnetic tape cartridge is accidentally dropped on the floor, the tape puller 7 can be reliably prevented from jumping out of the case.

FIG. 6 shows another embodiment of the present invention. Here, a pressing piece 23 is protruded from the inner surface of the lid 5 opposed to the upper and lower engaging shaft portions 11, and when the lid 5 is closed, the pressing piece 23
Is different from the above-mentioned embodiment in that it engages with the peripheral surface of the engagement shaft portion 11 to hold and fix the tape puller 7 in a non-movable manner. The pressing piece 23 has a partially arcuate engagement surface 24 that is in close contact with the peripheral surface of the engagement shaft portion 11, and has an inclined surface 25 on one side of the engagement surface 24 to facilitate the climbing. As described above, according to the lid 5 having the pressing piece 23 that engages with the engagement shaft portion 11, the lid 5 can be prevented from being opened and slid unless there is a clear intention of the user. 5 can be released, and errors in use such as touching the magnetic surface of the tape 3 wound on the reel 2 can be eliminated. In this case, the spring 6 for the lid 5 may be omitted.

In addition to the above embodiment, the tape pull-out tool 7 may be formed of a plastic molded product. The connection structure of the tape 3 to the tape pull-out tool 7 is not limited to the embodiment. For example, the connection shaft portion 8 is formed in a cylindrical shape having the same diameter as the partition wall 9, and a clamp groove is provided on the peripheral surface thereof. The tape end and the clamp may be press-fitted into the groove. The engagement shaft portion 11 does not need to be a round shaft, and may be formed in a polygonal cross section. Similarly, the concave shape of the shaft holding portion 15 can be changed to a triangle, a trapezoid, or the like, and the shaft holding portion 15 can be formed by providing a projection on the upper wall or the bottom wall. The opening position of the tape outlet 7 may be any corner as long as it is near the four corners of the case.

[0021]

According to the present invention, the shaft holding portions 15 are provided above and below the tape outlet 4, and the engaging shaft portions 11 at the upper and lower ends of the tape puller 7 are received by the shaft holding portions 15 to ensure reliable positioning. Can be held. Further, using the lid 5 that opens and closes the tape pull-out opening 4, the tape pull-out tool 7 is moved to the shaft holding portion 15.
To prevent the player from getting out of the room. Therefore, the tape pull-out device 7 can be securely captured and connected by the tape drive capturing device, and the reliability in use can be improved as compared with the conventional example. By eliminating the displacement, the tape puller 7 in the standby state can be accurately positioned and held even during long-term use. In addition, lid 5
, The standby state of the tape puller 7 is maintained, so that an increase in the number of parts can be avoided, and the manufacturing cost of the magnetic tape cartridge can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line AA in FIG.

FIG. 2 is a cross-sectional plan view of the magnetic tape cartridge.

FIG. 3 is a front view of a tape outlet.

FIG. 4 is a perspective view of a tape pull-out tool.

FIG. 5 is a perspective view of a shaft holding unit.

FIG. 6 is a plan view showing another embodiment of the lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case main body 2 Reel 3 Tape 4 Tape pull-out port 5 Lid 7 Tape pull-out tool 11 Engagement shaft part 15 Shaft holding part 18 Doorway 23 Pressing piece

Claims (3)

[Claims] A tape (3) is provided inside a box-shaped case body (1).
And one reel 2 on which a tape 3 is wound.
A pin-shaped tape pull-out tool 7 is connected to the feeding end of the tape pull-out tool, and a tape pull-out port 4 for pulling out the tape pull-out tool 7 is opened in the peripheral side wall of the case body 1. The lid 5 that closes 4
Engagement shaft portions 1 provided at the upper and lower ends of the tape puller 7 on the inner surface of the upper wall and the inner surface of the bottom wall of the case body 1 facing the tape outlet 4 are slidably supported by the case body 1.
A shaft holding portion 15 for receiving and positioning the shaft 1 is provided. The shaft holding portion 15 is disposed adjacent to the inner surface of the lid 5 for closing the tape outlet 4 and opens toward the tape outlet 4. A single-reel magnetic tape cartridge, wherein the engaging shaft portion (11) housed in the shaft holding portion (15) is held by the cover (5) so as not to come off. 2. The shaft holding portion 15 is formed as a shallow concave portion, and a pressing piece 23 that cooperates with the shaft holding portion 15 to pinch and hold the tape puller 7 in a non-movable manner is protruded from the inner surface of the lid 5. 2. The single reel type magnetic tape cartridge according to claim 1, wherein: 3. A tape puller 7 includes a connecting shaft portion 8 around which the tape 3 is wound and connected, an operating shaft portion 10 provided above and below the connecting shaft portion 8, and a member having a larger diameter than the operating shaft portion 10. Coaxial part 1
The single-reel type magnetic tape cartridge according to claim 1, comprising: