JP3908962B2 - Single reel type magnetic tape cartridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a single reel type magnetic tape cartridge having a leader tape at a leading end of a magnetic tape.
[0002]
[Prior art]
In a single reel type magnetic tape cartridge (hereinafter simply referred to as a tape cartridge), it is known in Japanese Patent Laid-Open No. 11-328920, for example, to provide a leader tape at the leading end of the magnetic tape. There, a keyhole-shaped connecting hole is provided in the connecting portion at the end of the leader tape, and a latching piece is formed to project from the upper and lower edges of the connecting portion. This latching piece is provided to regulate the winding limit of the leader tape. By receiving both latching pieces in the receiving groove provided at the tape outlet of the main body case, the connecting part is excessively inserted into the main body case. It can prevent being caught.
[0003]
[Problems to be solved by the invention]
In many cases, the leader tape is formed of a thick polyester tape or the like, and has a higher strength than a magnetic tape. However, each time the magnetic tape is rewound, the upper and lower latching pieces collide with the receiving groove of the main body case, so that the base end of the latching piece cracks, and in the worst case, the latching piece is broken into pieces. End up. If the latching piece is damaged or deformed in this manner, the leader tape standby position in a state where the magnetic tape is rewound is varied, resulting in poor connection by the loading mechanism. Increasing the thickness of the leader tape increases the strength of the latching piece, but in this case, a step is formed at the connection between the leader tape and the magnetic tape, and the magnetic tape is deformed along the shape of the step and is attached. The recording / reproduction characteristics of the part will deteriorate.
[0004]
The purpose of the present invention is to relieve and absorb the impact when the hooking piece of the leader tape collides with the stopper on the main body case side when rewinding the magnetic tape, thereby breaking or deforming the hooking piece during long-term use. Is to improve the reliability of the tape cartridge.
[0005]
[Means for Solving the Problems]
In the tape cartridge of the present invention, as shown in FIGS. 2 and 3, a single reel 2 is arranged inside a box-shaped main body case 1, and a leader tape 4 is attached to a feeding end of a magnetic tape 3 wound around the reel 2. A single reel type magnetic tape cartridge to which is connected. In this case, as shown in FIG. 1, latching pieces 12 are formed to project from the upper and lower edges of the connecting portion 10 provided at the free end of the leader tape 4. A stopper 13 is provided to prevent the leader tape 4 from being excessively caught. The stopper 13 is a rib-like protrusion 14 formed integrally with the main body case 1, and the protrusion 14 is elastically deformed when receiving a collision impact of the latching piece 12, thereby relaxing and absorbing the collision impact. It is characterized by that.
[0006]
The protrusion 14 can be formed so as to rise from the bottom surface of the recess 15 formed in the body case 1 , thereby increasing the height of the protrusion by the depth dimension of the recess 15 , and thereby the impact of the protrusion 14. Absorption power can be improved.
[0007]
[Effects of the invention]
In this invention, in order to prevent excessive winding of the leader tape, the stopper provided at the tape outlet is formed of a rib-shaped protrusion integrally formed with the main body case, and the impact impact of the latching piece when the tape is rewound is detected. It was made to absorb and relax by elastically deforming itself. Therefore, even if the latching piece collides with the stopper every time the tape is rewound, the projection is elastically deformed and absorbed and relaxed, so that the latching piece is damaged or deformed. Can be reliably prevented, and breakage and deformation of the latching piece during long-term use can be prevented to improve the reliability of the tape cartridge.
[0008]
Projections, according to the configuration that has been rising formed from the bottom surface of the recess formed recess on the inner surface of the body case, kill magnitude Kude the height of the projections by the depth dimension of the recess. Therefore, for example, the impact absorbing power of the projection can be improved as compared with the case where the projection is formed from the inner surface of the main body case.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 3 show an embodiment of a single reel type magnetic tape cartridge according to the present invention. 2 and 3, the magnetic tape cartridge accommodates one reel 2 inside a rectangular box-shaped main body case 1 formed by joining resin upper and lower cases 1 a and 1 b in a lid-like manner. A magnetic tape 3 (hereinafter simply referred to as a tape) is wound. A leader tape 4 for pulling out the tape 3 is connected to a feeding end of the tape 3 via a splicing tape. A tape outlet 5 is provided on the front surface of the main body case 1. The tape outlet 5 can be opened and closed by a swingable door 6. The door 6 is closed by a spring 7 and urged to swing freely. A lock piece is incorporated into the swing base end of the door 6 so that the door 6 can be opened only when the lock piece is unlocked. In FIG. 2, reference numerals 8a and 8b are reel locks, and 9 is a switching piece for preventing erroneous erasure.
[0010]
At the free end of the leader tape 4, a tongue-like connecting portion 10 is integrally formed as shown in FIG. A keyhole-shaped connection hole 11 is provided in a penetrating manner in the central portion of the connection portion 10, and a rectangular hooking piece 12 is projected from each of the upper and lower edges of the connection portion 10. In the standby state in which the tape 3 and the leader tape 4 are taken up by the reel 2, the previous latching piece 12 is received by the stopper 13 provided inside the tape outlet 5, and the leader tape 4 is further connected to the main body. It prevents excessive entrainment in the case 1. In this standby state, the connecting portion 10 including the connecting hole 11 is positioned and held and exposed from the tape outlet 5 to the outside of the case. Therefore, the member on the tape drive side is engaged and connected to the connecting hole 11 and the leader tape 4 Can be pulled out to the front outside of the main body case 1.
[0011]
In FIG. 1, the stopper 13 includes a pair of upper and lower rib-shaped protrusions 14 integrally formed on the inner surface of the upper surface wall of the upper case 1a and the inner surface of the lower surface wall of the lower case 1b. These protrusions 14 are formed so as to rise from the bottom surface of the recess 15 formed in the inner surface of the upper and lower cases 1a and 1b. These protrusions 14 are arranged so that the center in the width direction faces the movement locus of the latching piece 12.
[0012]
The thickness of the protrusion 14 is so thin that the protrusion 14 itself is elastically deformed when the latching piece 12 collides with the protrusion 14 so that the collision shock can be relaxed and absorbed . Collision caused 14 to rise formed from the bottom surface of the recess 15 formed recess in the main body case 1, a depth dimension of the recess 15 takes increasing the height dimension of the protrusions 14, thereby improving the shock absorption.
[0013]
If the stopper piece 12 is received by the stopper 13 having the above-described configuration, even if the stopper piece 12 collides with the stopper 13 every time the tape 3 is rewound, the impact is reduced by the protrusion 14 elastically deforming. Therefore, it is possible to effectively and reliably prevent the latching piece 12 from being damaged or deformed at the base end of the connection with the connecting portion 10.
[Brief description of the drawings]
FIG. 1 is a front view showing a stopper. FIG. 2 is a plan view showing an internal structure of the tape cartridge. FIG. 3 is a front view of the tape cartridge.
DESCRIPTION OF SYMBOLS 1 Main body case 2 Reel 3 Magnetic tape 4 Leader tape 5 Tape outlet 10 Connection part 11 Connection hole 12 Stopping piece 13 Stopper 14 Protrusion 15 Recess

Claims (1)

A magnetic tape cartridge in which one reel is arranged inside a box-shaped main body case, and a leader tape is connected to a feeding end of the magnetic tape wound around the reel,
A latching piece protrudes from the upper and lower edges of the connecting portion provided at the free end of the leader tape,
A stopper is provided at the tape outlet of the main body case to receive the retaining piece and prevent the leader tape from being caught excessively.
The stopper is a rib-shaped protrusion integrally formed with the main body case;
The protrusion is formed to rise from the bottom surface of a recess formed as a recess in the main body case,
A single-reel type magnetic tape cartridge, wherein the protrusion is elastically deformed when subjected to a collision shock of the latching piece, so that the collision shock is relaxed and absorbed .

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