JPH1125646A - Magnetic tape cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate labor and time for coupling each lid and to reduce the number of parts by forming integrally a top lid in a shape that the top lid is coupled to at least either of an outer lid and an inner lid through a thin part having flexibility. SOLUTION: A lid 7 is formed integrally so that a top lid 8, an outer lid 9, and an inner lid 10 can be rotated. When a magnetic tape cartridge is inserted into a magnetic recording and reproducing device, a side plate of the outer lid 9 is pushed up by an opening cap pin arranged at the inside and rotated upward. The top lid 8 coupled to the outer lid 9 through a thin part is guided to a top lid guide groove while rotating with the outer lid 9. At the same time, the inner lid 10 coupled to the top lid 8 through a thin part is guided to an inner lid guide groove while rotating linking with the top lid guide 8 and a cap is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape cartridge having a three-lid structure for use in a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art Along with recent technical innovations such as a high density magnetic recording medium, a magnetic tape cartridge, a video tape recorder (hereinafter, referred to as a VTR) and the like have become compact. As a result, VTRs are very often used outdoors, such as when shooting landscapes or people.

For this reason, in consideration of use outdoors, etc., a magnetic tape cartridge has been put into practical use as a two- or three-sheet lid that covers the entire surface and the back surface of the magnetic tape, respectively, as a measure against dust.

Hereinafter, the above-described conventional magnetic tape cartridge will be described with reference to the accompanying drawings.

As shown in an assembly perspective view of FIG. 5 and a sectional view of a main part of FIG. 6, a magnetic tape 14 is stretched on a front surface of a magnetic tape cartridge 13. When the magnetic tape 14 is not used, the outer lid 15 is not used. , Top lid 16 and inner lid 17.

The side plate of the outer lid 15 has a pair of support pins 15a, and the support pins 15a are inserted into both front side surfaces of the upper half 18 of the magnetic tape cartridge 13. The outer lid 15 is rotatable about the support pin 15a. Further, a pair of pin holes 15b is formed in the upper front part of the side plate of the outer lid 15.
Are formed.

The front surface of the side surface of the top lid 16 has a pair of support pins 16a. The support pins 16a are inserted into pin holes 15b of the outer lid 15 and are rotatable.

A top lid guide groove 18a is formed at the front side of the upper half 18, and a pair of guide pins 16b formed on a side plate of the top lid 16 are slidably mounted.

The inside of the top lid 16 is provided with a pair of bracket portions 16c, and a pin hole 16d is formed in each bracket portion 16c.

A pair of support pins 17a are provided on side surfaces of the inner lid 17, and the pair of support pins 17a are provided in pin holes 16d of a bracket portion 16c of the top lid 16.
It is rotatably attached to the. Also, inner lid 1
The lower side surface of 7 has a guide pin 17b.

A pair of inner lid guide grooves 19b are provided behind one tape guide 19a formed on the lower half 19 and on both side surfaces of the opening. The inner lid guide groove 19b has an inner lid 17
Guide pin 17b is slidably mounted.

However, in the magnetic tape cartridge in which the three lids are pivot-coupled by the support pins as described above, the lids must be combined, and each of the lids must be assembled in the upper and lower halves. In addition, there is a disadvantage that the number of parts increases.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and in a magnetic tape cartridge having a three-lid structure, it is possible to eliminate the trouble of connecting the lids and reduce the number of parts. Aim.

[0014]

SUMMARY OF THE INVENTION The object of the present invention is to provide a cartridge body having an opening for inserting a tape pull-out member on a front surface thereof and a tape guide provided on a front surface of the cartridge body to stretch the opening to the opening. A suspended magnetic tape, an outer lid rotatably provided on the cartridge body and covering the front surface of the magnetic tape, and a top lid rotatably provided on the outer lid and covering an upper edge of the magnetic tape And an inner lid rotatably provided on the top lid and covering a rear surface of the magnetic tape.The top lid and the inner lid are interlocked with the rotation of the outer lid to open and close the opening. In the magnetic tape cartridge configured to perform the above operation, the top lid may be connected to the outer lid or the inner lid. It is solved by providing a magnetic tape cartridge characterized in that it is integrally molded into a shape which is connected via a thin portion having at least one and flexible.

According to the present invention, since the top lid is connected to at least one of the outer lid and the inner lid via the flexible thin portion, the thin portion exhibits a hinge function. Therefore, even if a plurality of lids are integrally formed, these lids can freely rotate with each other, and the top lid is linked with at least one of the connected lids.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings.

FIG. 1 is an assembled perspective view of a magnetic tape cartridge according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view.
As shown in FIG. 1, the magnetic tape cartridge 1 includes an upper half 2 and a lower half 3 formed of a synthetic resin or the like, and a pair of tape reels 5 around which a magnetic tape 4 is wound are housed in the upper and lower halves 2, 3. ing. The front surface of the magnetic tape cartridge 1 is provided with an opening 6 so that a tape pull-out member on the apparatus side can be inserted. At both ends of the opening 6 of the lower half 3, a pair of tape guides 3 a formed integrally with the lower half 3 is provided. The magnetic tape 4 is guided by the tape guide 3 a toward the opening 6. It is stretched.

As shown in FIG. 2, FIG. 3 which is a detailed view of the lid, and FIG. 4 which is a sectional view of the lid, a lid 7 according to an embodiment of the present invention comprises a top lid 8 and an outer lid 9.
The inner lid 10 is integrally formed so as to be rotatable. That is, the outer lid 9 is integrally formed with the inside of the front surface of the top lid 8 via a thin portion 11 having flexibility, and the inner lid 10 is flexible with the inside of the top lid 8. It is integrally formed into a shape connected via the thin portion 12.

The top lid 8 is composed of a top lid 8a covering the upper edge of the magnetic tape 4 stretched over the opening 6, and a side plate 8b covering the side surface of the upper half 2. A pair of cutouts 2b are provided in front of the side surface of the upper half 2 so as to cut out dimensions substantially equal to the thickness of the side plate 8b. The notch 2b has a straight portion and a curved portion, and a pair of top lid guide grooves 2c having one end open is formed. The top lid guide groove 2c is formed inside the rear side of the side plate 8b. Pair of guide pins 8c
Are slidably mounted.

The outer lid 9 includes an outer lid portion 9a that covers the front surface of the magnetic tape 4 stretched over the opening 6;
A side plate 9b covers the front of the upper and lower halves 2, 3. The side plate 9b has a pair of fulcrum pins 9c, and the fulcrum pins 9c are inserted into a pair of cutouts 2a provided on both front side surfaces of the upper half 2. The outer lid 9 is rotatable about a fulcrum pin 9c.

The inner lid 10 covers the back surface of the magnetic tape 4 stretched over the opening 6. The lower side surface of the inner lid 10 has a pair of protrusions 10a, and the protrusions 10a are further formed with guide pins 10b. Behind the pair of tape guides 3 a formed in the lower half 3, and on both sides of the opening 7, a pair of inner lid guide grooves 3 whose upper parts are open
b is provided. This inner lid guide groove 3b
A pair of guide pins 10b formed on the protruding portion 10a of the inner lid 10 are slidably inserted therein.

When the magnetic tape cartridge 1 of this embodiment is inserted into the magnetic recording / reproducing apparatus, the side plate of the outer lid 9 is pushed up by the lid-opening pin arranged on the apparatus side, so that the outer lid 9 rotates upward. At this time, the top lid 8 connected to the outer lid 9 via the thin portion is guided in the top lid guide groove 2c while rotating in conjunction with the outer lid 9. at the same time,
The inner lid 10 connected to the top lid 8 via a thin portion is opened while being guided by the inner lid guide groove 3b while rotating in conjunction with the top lid 8. Note that the closing operation is performed in a completely opposite manner to the above-described operation.

The lid of the present embodiment having the above-described configuration is integrally formed in a shape in which the top lid, the outer lid, and the inner lid are connected to each other through a thin portion having flexibility. It is possible to save the trouble of connecting the parts and to reduce the number of parts.

As still another embodiment, the top lid 8
And the outer lid 9 are integrally formed into a shape connected via a thin portion having flexibility, and only the top lid 8 and the inner lid 10 are formed into a shape connected via a thin portion having flexibility. It is also possible to integrally mold.

[0025]

As described above, according to the present invention, the top lid is formed integrally with at least one of the outer lid and the inner lid via a flexible thin portion. Compared to a magnetic tape cartridge in which each lid is pivotally connected by a support pin as in the past, the labor for connecting each lid can be omitted, and while maintaining the function of interlocking the lids, the lids can be integrated into parts. It is possible to reduce the score.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view of a magnetic tape cartridge according to the present invention.

FIG. 2 is an exploded perspective view of the magnetic tape cartridge according to the present invention.

FIG. 3 is a detailed view of a lid according to the present invention.

FIG. 4 is a sectional view of a lid according to the present invention.

FIG. 5 is an assembled perspective view of a magnetic tape cartridge according to the related art.

FIG. 6 is a sectional view of a main part of a magnetic tape cartridge according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic tape cartridge 2 Upper half 2a Notch 2b Notch 2c Top lid guide groove 3 Lower half 3a Tape guide 3b Inner lid guide groove 4 Magnetic tape 5 Tape reel 6 Opening 7 lid 8 Top lid 8a Top lid 8b Side plate 8c Guide pin 9 Outer lid 9a Outer lid part 9b Side plate 9c Support point pin 10 Inner lid 10a Projection 10b Guide pin 11 Thin part 12 Thin part 13 Magnetic tape cartridge 14 Magnetic tape 15 Outer lid 15a Support pin 15b Pin hole 16 16b Support pin 17 Inner lid 17a Support pin 17b Guide pin 18 Upper half 19 Lower half 19a Tape guide 19b Inner lid guide groove

Claims (1)

[Claims] A cartridge main body having an opening for inserting a tape pull-out member formed on a front surface thereof; a magnetic tape stretched over the opening by a tape guide provided on a front surface of the cartridge main body; An outer lid that is rotatably provided and covers the front surface of the magnetic tape; a top lid that is rotatably provided on the outer lid and covers an upper edge of the magnetic tape; and a rotatably provided on the top lid. An inner lid that covers a rear surface of the magnetic tape, wherein the top lid and the inner lid are interlocked with the rotation of the outer lid to open and close the opening. The top lid has flexibility with at least one of the outer lid and the inner lid. Magnetic tape cartridge characterized in that it is integrally molded into a shape which is connected through the meat section.