JPH11232827A - 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 at the upper/lower ends of the tape pulling out means 7 are caught with engagement by both of the shaft holding parts 15 and positioned. A recessed part 20 is provided on the shaft holding part 15 for accepting the engaging shaft part 11 so as to open toward the side of the tape pulling out part 4. At both sides of this recessed part 20, engaging arms 19 are provided for preventing the fall-off of the engaging shaft parts 11. The engaging arms 19 are supported in cantilever and elastically deformed in the horizontal direction, thereby the entering and exiting of the engaging shaft parts 11 against the recessed part 20 are allowed.

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.

A tape puller formed of a plastic block does not deform itself and holds a posture during standby by 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 slightly move in the standby state, and the tape pull-out tool is always exposed on 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 integrally form a holding structure for holding a pin-shaped tape pull-out tool with the case body integrally with the case body, thereby reducing the number of components of the magnetic tape cartridge and reducing the manufacturing cost. It is in.

[0007]

As shown in FIG. 2, the magnetic tape cartridge of the present invention has a box-shaped case body 1 in which a single reel 2 on which a tape 3 is wound is disposed. 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 on the peripheral side wall of the case body 1. As shown in FIGS. 1 and 3, bearings for engaging and catching engagement shaft portions 11 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 facing the tape outlet 4. The parts 15 are provided integrally. The bearing portion 15 is opened toward the tape outlet 4, and the engagement shaft portion 11 is opened.
Is formed. At least one side of the concave portion 20 is provided with an engagement arm 19 that holds the engagement shaft portion 11 so as not to be disengaged and is elastically deformable in the lateral direction.

More specifically, the bearing 15 includes side walls 25 and 26 sandwiching the recess 20 on the left and right, and a base wall 18 provided on the far end side of the recess 20. At least one of the side walls 25 and 26 projects in a cantilever manner toward the tape outlet 4 and is formed as an engagement arm 19 that can be elastically deformed in the lateral direction.

In a non-use state, a lid 5 for closing the tape outlet 4 is provided. The lid 5 is slidably opened and closed by the case body 1, and is closed and urged by a spring.

As shown in FIG. 4, the tape puller 7 has a connecting shaft 8 around which the tape 3 is wound and connected, an operating shaft 10 provided above and below the connecting shaft 8, and a larger operating shaft 10 than the operating shaft 10. And an engagement shaft portion 11 having a diameter.

[0011]

When the tape puller 7 is housed inside the case body 1, the engaging shafts 11 at the upper and lower ends of the tape puller 7 are provided on the inner surfaces of the case upper wall and the case bottom wall.
Is engaged and captured. More specifically, the engaging shaft 11 enters the recess 20 of the bearing 15 and is received. further,
The engagement arm 19 facing the concave portion 20 circumscribes the engagement shaft portion 11,
The engaging shaft portion 11 is prevented from falling out of the concave portion 20, and the tape puller 7 is positioned and held. Therefore, the tape puller 7 can be positioned and held more accurately and reliably than a conventional magnetic tape cartridge.

In order to allow the engaging shaft portion 11 to move in and out of the concave portion 20, while maintaining a standby state in which the engaging shaft portion 11 has entered the concave portion 20, the engaging arm 19 is formed so as to be elastically deformable in the lateral direction. ing. Since the bearing portion 15 including the engagement arm 19 is formed integrally with the upper wall and the bottom wall of the case body 1, the number of components can be reduced by that amount, and the bearing portion 15 is formed of an independent component. Since there is no possibility that the bearing portion 15 separates from the case body 1 and falls off as compared with the case where it is assembled to the main body 1, reliability in long-term use can be improved.

A cover 5 which can be opened and closed by sliding the tape outlet 4
, The tape puller 7 when not in use can be prevented from being exposed to the outer surface of the case via the tape outlet 4, and dust and the like do not enter from the tape outlet 4.

[0014]

1 to 6 show an embodiment of a single reel type magnetic tape cartridge according to 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 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 pulling-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 8 in a loop shape, a buffer 12 having a C-shaped cross section is fitted on the outer surface of the loop portion, and a C-shaped clamp formed of a thin metal plate on the buffer 12. 1
The tape puller 7 is connected to the tape 3 by externally fitting the tape 3. The buffer 12 is interposed to prevent the tape 3 from coming into contact with the circumferential edge of the clamp 13 and being cut off.

In order 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 surface of the upper wall of the upper case 1 a and the inner surface of the bottom wall of the lower case 1 b is A bearing portion (15) for engaging and capturing the peripheral surface of the engagement shaft portion (11) and a holding recess (16) for receiving a shaft end surface of the engagement shaft portion (11) are provided. In FIG. 5, the holding recess 16 of the lower case 1b is formed by making the case bottom wall shallowly concave.
A downwardly inclined vertical guide surface 17 is provided between the leading edge and the opening edge of the tape outlet 4. The bearing 15 is provided with the holding recess 1.
6, a pair of engaging arms 19, 19 protruding horizontally from the upper right and left sides of the base wall 18 toward the tape outlet 4.
And the two engaging arms 19, 19 form a recess 20 that opens toward the tape outlet 4. The engagement shaft 11 enters into the recess 20 and is received.

The engaging arms 19 are formed integrally with the base wall 18 by using a slide core when the lower case 1b is formed, and are supported cantilevered above the bottom wall of the holding recess 16; It can be elastically deformed in the horizontal direction. Receiving claws 21 for preventing the engaging shaft portion 11 from coming off are provided on the opposite side surfaces of the protruding ends of the two engaging arms 19. Whether the distance between the pair of engaging claws 19 in the left-right direction is the same as the diameter of the engaging shaft portion 11,
The distance between the protruding ends of the pair of receiving claws 21 is set to be slightly larger than the diameter of the engagement shaft portion 11 while being set slightly larger than this. The circumferential side surfaces of the pair of receiving claws 21 on the side of the tape outlet 4 are rounded into a partial arc shape to form an introduction guide surface 22. On the inner surface of the upper wall of the upper case 1a, a bearing 15 and a holding recess 16 similar to those of the lower case 1b are provided symmetrically in the vertical direction. The interval between the upper and lower holding recesses 16 is set slightly larger than the vertical length of the tape puller 7.

In use, when the magnetic tape cartridge is loaded into the tape drive with the side of the case side wall 24 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 vertical vertical guide surfaces 17 so that the tape puller 7 is in the vertical position. The deviation is corrected. At the time when the engaging shaft 11 has passed over the front edge of the bearing 15, as shown in FIG.
9 comes into contact with the introduction guide surface 22. Therefore, the left and right engaging arms 19 are elastically deformed as shown by imaginary lines and pushed away from each other, and the engaging shaft portion 11 rides over the receiving claw 21 and enters the concave portion 20 as shown in FIG. Get in.
At the same time, since the engaging arm 19 is deformed by return, the engaging shaft 11
Is held by the receiving claws 21 so as not to come out, and the tape pull-out device 7
Is held and fixed.

FIG. 7 shows another embodiment of the bearing portion 15. There, a pair of side walls 25 and 26 sandwiching the recess 20 on the left and right.
And the base wall 18 protruding from the rear end of the recess 20 to form the bearing 1
5 is formed, and the right side wall 26 of the side walls 25 and 26 is protruded from the upper portion of the base wall 18 in a cantilevered manner, and the side wall 26 is elastically deformable in the lateral direction. The arm 19 was set. The left side wall 25 is formed integrally with the case bottom wall (case upper wall) similarly to the base wall 18. The other parts are the same as those of the above-described embodiment, and the same members are denoted by the same reference numerals and description thereof will be omitted. As can be understood from this embodiment, the engagement arm 19 may be provided on one of the right and left sides facing the recess 20.

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 recessed shape of the bearing 15 can be changed to a triangle, a trapezoid, or the like, and the bearing 15 can be formed by providing a projection on the upper wall or the bottom wall. If there is room in the vertical dimension of the case main body 1, the holding recess 16 can be omitted, and the end surface of the engagement shaft 11 can be received by the bottom or top wall of the case. When the engagement shaft portion 11 enters the recess 20, the engagement arm 19 can be changed so that it is slightly elastically deformed and comes into close contact with the peripheral surface of the engagement shaft portion 11. The engagement arm 19 does not need to be formed integrally with the base wall 18, and can be supported in a cantilever manner by an upright wall portion corresponding to the base wall 18. Similarly, the side wall 25 is connected to the base wall 18.
And can be formed separately. The opening position of the tape outlet 7 may be any corner as long as it is near the four corners of the case.

[0022]

According to the present invention, bearings 15 are provided above and below the tape outlet 4, and the recesses 2 provided in the bearings 15 are provided.
At 0, the engaging shaft portions 11 at the upper and lower ends of the tape pull-out tool 7 are received, so that the positioning can be reliably carried out. Further, an engagement arm 19 that can be elastically deformed in the lateral direction is provided on one side of the recess 20 so that the engagement shaft 11 can be prevented from falling out of the recess 20. Accordingly, the tape puller 7 can be reliably captured and connected by the tape drive capturing device, and the reliability in use can be improved as compared with the conventional magnetic tape cartridge. By eliminating the displacement of the pull-out tool 7, the tape pull-out tool 7 in the standby state can be accurately positioned and held even during long-term use. Since the bearing portion 15 for engaging and capturing the tape puller 7 is formed integrally with the case main body 1, an increase in the number of components due to the provision of the bearing portion 15 can be prevented, and the manufacturing cost of the magnetic tape cartridge can be reduced accordingly. In addition, the reliability of the bearing 15 can be improved.

[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 bearing unit.

FIG. 6 is a sectional view similar to FIG. 1, showing a housed state of the tape drawer.

FIG. 7 is a plan view showing another embodiment of the bearing unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case main body 2 Reel 3 Tape 4 Tape draw-out 5 Lid 7 Tape pull-out tool 11 Engagement shaft part 15 Bearing part 18 Base wall 19 Engagement arm 20 Depression 21 Receiving nail

Claims (4)

[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 magnetic tape cartridge, and a tape pull-out port 4 for pulling out the tape pull-out tool 7 is opened on the peripheral side wall of the case body 1; Engagement shaft portions 1 provided at the upper and lower ends of a 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 outlet 4.
1 are provided integrally with each other. The bearing 15 is formed with a concave portion 20 which is opened toward the tape outlet 4 and receives the engaging shaft 11. A single reel type magnetic tape cartridge in which at least one side of the concave portion (20) is provided with an engaging arm (19) for retaining the engaging shaft (11) so as not to be disengaged and capable of being elastically deformed in the lateral direction. 2. The bearing portion 15 includes side walls 25 and 26 sandwiching the recess 20 on the left and right, and a base wall 18 provided on the far end side of the recess 20.
And at least one of the side walls 25 and 26 is provided with a tape outlet 4.
2. The single reel type magnetic tape cartridge according to claim 1, wherein the single arm type magnetic tape cartridge is formed as an engagement arm 19 projecting in a cantilevered manner toward the side of the head and being elastically deformable in a lateral direction. 3. A cover 5 for closing the tape outlet 4 in a non-use state is slidably supported on the case body 1, and the cover 5 is closed and urged to move freely by a spring. 3. The single-reel magnetic tape cartridge according to 1 or 2. 4. 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, wherein the magnetic tape cartridge comprises: