JPH1139831A - Magnetic tape cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts while improving assembling performance of a magnetic tape cartridge. SOLUTION: This magnetic tape cartridge has a magnetic tape reel which is housed into upper and lower cartridges for a magnetic tape to be wound thereon, a lid provided at an opening part through which the magnetic tape is pulled out with one end thereof rotatably pivoted on the upper and lower cartridges and a lid lock 20 one end of which is engaged with a recessed part of the lower cartridge to lock the lid unable to rotate during the unuse period of the magnetic tape cartridge. In this case, an elastically deformable part 20a is integrally provided on the lid lock 20 to energize the lid lock 20 to be locked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape reel which is housed in an upper and lower cartridge and on which a magnetic tape is wound, and which is provided in an opening for drawing out the magnetic tape.
The present invention relates to a magnetic tape cartridge having a lid whose one end is rotatably supported by the upper and lower cartridges, and a lid lock for locking the lid so that it cannot rotate when the magnetic tape cartridge is not used.

[0002]

2. Description of the Related Art Conventionally, a magnetic tape cartridge used as a recording medium of a computer or the like has a magnetic tape wound on a single magnetic tape reel, and this magnetic tape reel is composed of a pair of cartridges, that is, an upper cartridge and a lower cartridge. There is a magnetic tape cartridge rotatably housed inside a cartridge case made of a cartridge.

FIG. 6 shows a conventional magnetic tape cartridge 1.
The upper cartridge 2a, the lower cartridge 2b, the magnetic tape reel 3, the bearing 6, the spring plug 7, and one end of a boss provided substantially at the center of the inner surface of the upper cartridge 2a. And a reel spring 8 mounted on a spring plug 7 whose other end is locked by a bearing 6 to urge the magnetic tape reel 3 toward the lower cartridge 2b.

[0004] The magnetic tape reel 3 includes an upper reel 4 and a lower reel 5. The outer peripheral surface of the upper reel 4 is formed on a gear portion 4a, and the entire magnetic tape reel 3 can be rotated and stopped by engaging and disengaging the reel locks 60 and 70 appropriately urged by a reel lock spring 12. Is configured.

[0005] A lid 13, one end of which is pivotally supported by the magnetic tape cartridge 1 and which can be opened and closed and rotatably urged by a lid spring 15, is provided at an opening from which a magnetic tape (not shown) is pulled out. . When the magnetic tape cartridge is not used, the lid 13 cannot be rotated because the lid lock 14 appropriately urged by the lid lock spring 16 engages with the concave portion 2d of the lower cartridge 2b.

FIG. 7A is a perspective view of the lid 13. As shown in FIG. 7A, the lid 13 has a recess 13a into which the lid lock spring 16 is inserted, and a recess 13a.
, A through hole 13c into which a lid lock 14 is inserted, and a shaft support 1 that rotatably supports the lid 13 on the magnetic tape cartridge 1.
3d is provided.

FIG. 7 (b) shows an assembled perspective view of the lid 13. As shown in FIG. As shown in FIG. 7B, the lid 13 has a lid lock spring 16 housed between the inner wall of the recess 13 a of the lid 13 and the projection 13 b. The boss 14a of the lid lock 14 is inserted into the lid lock spring 16, and the lid lock 14 is assembled to the lid lock spring 16, and the lid lock 14 is
, And is provided on the lid lock 14 to prevent the lid lock 14 from popping out.
b is in a state of operation. As a result, the hole 1 of the lid 13
The upper end of the lid lock 20 protrudes from 3c. The upper end of the protruding lid lock 14 engages with the concave portion 2d of the lower cartridge 2b, so that the lid 13 cannot rotate.

[0008]

However, there are the following problems when assembling the lid lock spring 16 and the lid lock 14 on the lid 13. That is, after the lid lock spring 16 is inserted into the concave portion 13a of the lid 13, the lid lock spring 16 is only placed between the lid lock 14 and the lid lock spring 16 until the lid lock 14 is inserted from the through hole 13c and assembled. If an unexpected vibration or the like occurs in the lid 13, the lid lock spring 16 becomes unstable, and the lid 13 may fall or fall from the inner walls of the projection 13b and the recess 13a of the lid 13. Therefore, the assemblability of the magnetic tape cartridge has not been improved. Also,
There is also a problem that the number of parts is increased by using the lid lock spring 16. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and to improve assemblability of a magnetic tape cartridge and reduce the number of parts.

[0009]

SUMMARY OF THE INVENTION The object of the present invention is to provide a magnetic tape reel which is housed in an upper and lower cartridge and on which a magnetic tape is wound, and which is provided in an opening for drawing out the magnetic tape. A magnetic tape cartridge having a lid rotatably supported at one end and a lid lock having one end engaged with a recess of the lower cartridge to lock the lid non-rotatably when the magnetic tape cartridge is not used. In the magnetic tape cartridge, the lid lock is provided integrally with an elastically deformable portion for urging the lid lock in a locking direction.

According to the present invention, the lid lock is provided integrally with an elastically deforming portion for urging the lid lock in the locking direction, and the elastically deforming portion serves as a lid lock spring, and the magnetic tape When the cartridge is not used, the lid cannot be rotated. Therefore, the operation of assembling the lid lock to the lid lock spring is not required by the elastically deforming portion replacing the lid lock spring, so that the assemblability of the magnetic tape cartridge can be improved and the number of parts can be reduced.

[0011]

An embodiment of the present invention will be described below with reference to the accompanying drawings. The same components as those in the related art will be described with the same reference numerals. FIG. 1A is a front view of a lid lock of a magnetic tape cartridge according to an embodiment of the present invention, and FIG. 1B is a front view when an elastically deformable portion of the lid lock is elastically deformed. FIG. 2 shows a method of assembling the lid lock to the lid. FIG. 3 shows an assembled perspective view of the lid. FIG. 4 is a perspective view of the lid in a state where the lid is unlocked. FIGS. 5A to 5C show front views of another embodiment of the lid lock.

As shown in FIG. 1A, the lid lock 2
An elastically deforming portion 20a for urging the lid lock 20 in the locking direction of the lid is provided integrally with the lower end in FIG. The lid lock 20 has an elastically deformable portion 2.
The tapered projection 20 prevents the lid lock 20 urged by Oa from jumping out of the hole 13c of the lid 13.
b is provided. The shape other than the elastic deformation portion 20a is the same as that of the conventional lid lock. The elastically deformable portion 20a has a substantially U-shape bent so as to be elastically deformable in order to replace the lid lock spring. Therefore, the lid lock 20 itself is formed of an elastically deformable material, for example, POM (polyacetal). When the lid is unlocked, the elastically deformable portion 20a of the lid lock 20 is elastically deformed as shown in FIG.

As shown in FIG. 2, the lid lock 20 is assembled to the lid 13 by first inserting the lid lock 20 into the through hole 13c of the lid 13 in the direction of arrow A. Then, as shown in FIG.
Is appropriately urged by the elastically deforming portion 20a, so that the tapered convex portion 20b for preventing the lid lock 20 from popping out is in a state of acting. As a result, the hole 13c of the lid 13
, The upper end of the lid lock 20 protrudes. The upper end of this protruding lid lock 20 is
And the lid 13 cannot rotate. As shown in FIG. 4, when the lid 13 is unlocked, the elastically deformable portion 20a of the lid lock 20 is elastically deformed so that the upper end of the lid lock 20 does not protrude from the hole 13 of the lid. As a result, the recess 2 of the lower cartridge 2b
d is disengaged. As described above, the elastically deformable portion replacing the lid lock spring eliminates the need for assembling the lid lock to the lid lock spring, thereby improving the assemblability of the magnetic tape cartridge and reducing the number of parts.

The elastically deformable portion of the lid lock according to the present invention is not limited to the above-described elastically deformable portion, and various changes can be made. FIG. 5A to FIG.
Shown in The elastically deformable portion 20c of the lid lock 20 in FIG. 5A has a substantially U-shaped shape that is bent to be elastically deformable. The elastically deformable portion 20d of the lid lock 20 shown in FIG. 5B is composed of a single leaf spring that obliquely contacts the bottom surface of the recess of the lid. The elastically deformable portion 20e of the lid lock 20 in FIG. 5C is formed of a substantially V-shaped open leg-shaped leaf spring. Each of the elastically deformable portions 20c to 20e serves as a lid lock spring and is elastically deformable. The elastically deformable portion can be provided, for example, by integral molding of resin, but is not limited to this, and can also be integrally provided by insert molding of metal (SUS or the like).

[0015]

As described above, according to the present invention, since the lid lock is provided integrally with the elastically deformable portion for urging the lidlock in the locking direction, the elastically deformable portion functions as a lid lock spring. To prevent the lid from rotating when the magnetic tape cartridge is not used. Therefore,
The elastically deforming portion replacing the lid lock spring eliminates the need for assembling the lid lock to the lid lock spring, thereby improving the assemblability of the magnetic tape cartridge and reducing the number of parts.

[Brief description of the drawings]

FIG. 1A is a front view of a lid lock according to an embodiment of the present invention, and FIG. 1B is a front view of the lid lock when an elastically deformable portion of the lid lock is elastically deformed.

FIG. 2 shows a method of assembling a lid lock to a lid according to an embodiment of the present invention.

FIG. 3 is an assembled perspective view of the lid according to the embodiment of the present invention.

FIG. 4 is a perspective view of the lid in an unlocked state according to the embodiment of the present invention.

5 (a) to 5 (c) are front views of another embodiment of the lid lock.

FIG. 6 is an exploded perspective view showing the whole of a conventional magnetic tape cartridge.

FIGS. 7A and 7B are perspective views of a lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic tape cartridge 2a Upper cartridge 2b Lower cartridge 2d Boss 3 Magnetic tape reel 4 Upper reel 4a Gear part 5 Lower reel 6 Bearing 7 Spring plug 8 Reel spring 12 Reel lock spring 13 Lid 13a Depression 13b Projection 13c Through hole 13d Shaft support 14 lid lock 14a boss 14b convex portion 15 reel spring 16 lid lock spring 20 lid lock 20a elastically deformed portion 20b convex portion 20c, 20d, 20e elastically deformable portion 60 reel lock 70 reel lock

Claims (1)

[Claims] 1. A magnetic tape reel which is housed in an upper and lower cartridge and around which a magnetic tape is wound, and a lid which is provided at an opening for drawing out the magnetic tape and has one end pivotally supported by the upper and lower cartridges And a lid lock having one end engaged with a recess of the lower cartridge to lock the lid so that it cannot rotate when the magnetic tape cartridge is not used. A magnetic tape cartridge, wherein an elastically deformable portion for urging the magnetic tape in the locking direction is provided integrally.