JPS5935901Y2 - Magnetic recording tape protection device for tape cassettes - Google Patents

Description

[Detailed description of the invention] This invention allows the magnetic recording tape stored in the 71 housing of a tape cassette, which has an insertion window continuously formed from the peripheral wall to one end wall, to The present invention relates to a magnetic recording tape protection device for a tape cassette that prevents an insertion window from being deformed or damaged by external stress applied from a portion formed on one end wall during storage, or from being pulled out into an external space.

In a conventional tape cassette equipped with an insertion window having the shape described above, the sliding contact surface with the magnetic head of the magnetic recording tape is exposed at the portion of the insertion window formed on the peripheral wall.
Further, one side edge extending in the longitudinal direction of the magnetic recording tape is exposed at a portion formed on one end wall of the insertion window.

Therefore, if you leave the tape cassette without storing it in the cassette case that covers the entire tape cassette, or if you carry it without storing it in the cassette case, the part formed on one end wall of the insertion window When an external stress is applied to the magnetic recording tape, the magnetic recording tape may be pressed in the width direction by the external stress and be deformed or damaged, or the magnetic recording tape may be pulled out from the part formed on the peripheral wall of the insertion window into the external space. It was deformed or damaged.

Furthermore, in the conventional tape cassette equipped with the insertion window shaped as described above, the reel hub around which the magnetic recording tape is wound is rotatably supported by a pair of end walls of the tape cassette housing, making it portable. At times, vibrations applied to the tape cassette tend to cause the magnetic recording tape to loosen from its normal running path in the tape cassette housing, and the magnetic recording tape has a stronger tendency to loosen from the part formed in the peripheral wall of the insertion window into the external space. It has become a thing.

This idea was made based on the above circumstances, and when the tape cassette is carried or stored, the magnetic recording tape stored in the housing is damaged due to external stress applied from the part formed on one end wall of the insertion window. To provide a magnetic recording tape protection device for a tape cassette that prevents the magnetic recording tape from being deformed or damaged by being pressed in the width direction, and from being pulled out from the housing to the external space due to the above-mentioned external stress or vibration during carrying. The purpose is

An embodiment of this invention will be described below with reference to the drawings.

The tape cassette shown in FIG.
and a housing 14 for storing a magnetic recording tape 12 wound around a pair of reel hubs 10.

The housing 14 is composed of a peripheral wall 16 and a pair of end walls 18 that are held apart from each other by the peripheral wall 16 and rotatably support both ends of the pair of glue hubs 10. 16 and one end wall 18
A plurality of insertion windows 20 are formed continuously from the peripheral wall 16 to one end wall 18 for inserting a magnetic head (not shown), a pinch roller (not shown), or the like.

A sliding contact surface with a magnetic head (not shown) of the magnetic recording tape 12 is exposed at a portion of the insertion window 20 formed on the peripheral wall 16, and a surface of the insertion window 20 formed on one end wall 18 is exposed. One side line extending in the longitudinal direction of the magnetic recording tape 12 is exposed in the formed portion.

In this embodiment, since the housing 14 has a flat rectangular parallelepiped shape as shown in FIG. 1, it can be divided into peripheral wall portions.

These four peripheral wall parts are a front wall part 16a1 in which the insertion window 20 is formed, a left peripheral wall part 16b, a right peripheral wall part 16c, and a rear peripheral wall part 16d.

A shutter member 22 is disposed on the inner surface of one end wall 18 in front of the pair of reel hubs 10, as shown in particular detail in FIG.

The shutter member 22 is in the shape of a band plate, and its widthwise length is the width of the notch extending rearward from the inner surface of the front peripheral wall 16a of the portion formed on one end wall 18 of the insertion window 20. It is slightly larger than the depth, and its length in the longitudinal direction is approximately equal to the distance between the inner surfaces of the left and right peripheral wall portions 16b and 16c.

Therefore, the shutter member 22 is movable in the front-rear direction on the inner surface of one end wall 18 and along the inner surfaces of the left and right peripheral wall portions 16b and 16c.

A long hole 24 extending in the front-rear direction and penetrating each of the left and right peripheral walls 16b and 16c is formed on the inner surface of the left and right peripheral walls 16b and 16c, in a portion that faces the movement locus of the shutter member 22. There is.

An engaging protrusion 26 is disposed in the elongated hole 24 so as to be movable along the elongated hole 24, and the engaging protrusion 26 is integrally formed and fixed to the longitudinal end surface of the shutter member 22. There is.

When the engagement protrusion 26 is placed at a position spaced apart from the front end of the elongated hole 24 by a predetermined distance toward the rear end, the shutter member 22 is disposed only at the portion formed on one end wall 18 of the insertion window 20. 2, and when the engaging protrusion 26 moves to the rear end of the elongated hole 24, the shutter member 22 closes the portion of the insertion window 20. is placed in a second position to release the .

As shown in particular detail in FIG. 2, a spring holding portion 30 holding a linear spring 28 is formed at the center of the rear end of the shutter member 22 in the left-right direction.

As shown in particular detail in FIG. 2, the linear spring 28 has a center portion extending from the spring holding portion 30 at the same angle to one end wall, diagonally backward to the left and diagonally to the rear right from the spring holding portion 30. It extends the same distance along the inner surface of 18 on both the left and right sides.

The end of the central portion of the linear spring 28 extending diagonally to the left and the rear right is located forward of the pair of reel hubs 10, and From the extending end, a second
A first parallel extending portion extending along the inner surface of one end wall 18 to the left as shown in the figure is further provided in a row.

Further, a front peripheral wall portion 16a is provided at the end extending diagonally rearward to the right.
A second parallel extending portion extends along the inner surface of one end wall 18 to the right as shown in FIG. 2 in parallel with the inner surface of the end wall 18 .

The extending end of the first parallel extending portion is located further to the left than the reel hub 10 disposed on the left side in FIG. 2, and the extending end of the second parallel extending portion is located further to the left of the reel hub 10, which is located on the right side in FIG.

Furthermore, the vicinity of a portion of the first parallel extending portion that is connected to the diagonally rearward left extending end, and the portion of the second parallel extending portion that is connected to the right diagonally rearward extending end. A spring support member 32 is in contact with the vicinity from behind, and the spring support member 32 is
It is fixed to the inner surface of one end wall 18.

The center portion of the linear spring 28 is connected to the spring support member 3.
2, the shutter member 22 is brought into contact with the first
It is energized at the position of

The leftward extending end of the first parallel extending portion of the linear spring 2-8 is curved toward the reel hub 10 disposed on the left, as shown in FIG. The curved tip 36 is connected to the reel hub 1 located on the left side in FIG.
0 from the left to stop the rotation of the reel hub 10.

Further, the rightward extending end of the second parallel extending portion of the biasing means 28 is curved toward the reel hub 10 disposed on the left as shown in FIG. The tip portion 36 is connected to the reel hub 1 located on the right side in FIG.
0 from the right to stop the rotation of the reel hub 10.

Next, a tape cassette mounting portion of an electrical device using the tape cassette shown in FIG. 1 will be described with reference to FIG. 1.

In this embodiment, the tape cassette mounting section 38 is of the known Kangaru-pocket type.

A slit 42 is formed at the end of the left and right side walls 40 forming the tape cassette mounting section 38 on the opposite side from the tape cassette entrance/exit side.

The slit 42 extends in the front-rear direction along a lower wall 44 that faces one end wall 18 of the tape cassette mounted on the tape cassette mounting section 38 and constitutes the tape cassette mounting section 38. A lever 46 is disposed at.

An engaging claw 48 is formed at the front end of the lever 46 and projects from the inner surfaces of the left and right side walls 40 toward the inside of the tape cassette mounting section 38 .

The rear end of the lever 46 is pivotally attached to the lower wall 44 , and the lever 46 has an engaging pawl 48 along the inner surface of the lower wall 44 that connects the tape cassette mounting portion 38 from the inner surface of the left and right side walls 40 .
It is rotatable between a protruding position in which the engaging claws 48 protrude toward the inside of the housing 1 and a retracted position in which the engaging claws 48 are recessed into the inner surfaces of the left and right side walls 40.

Further, the lever 46 is always biased to be placed in the protruding position by biasing bodies 50 attached to the left and right side walls 40.

The tape cassette shown in FIG. 1 is mounted on the front peripheral wall portion 16a in the tape cassette mounting portion 38 configured as above.
When installed from the side, the engaging claw 48 of the lever 46 is located in the elongated hole 24 at a position spaced apart from the front end of the elongated hole 24 and the front end of the elongated hole 24 by a predetermined distance toward the rear end. The engaging protrusion 26 is inserted between the engaging protrusion 26 and the engaging claw 48 comes into contact with the engaging protrusion 26 as the tape cassette is attached to the tape cassette mounting portion 38, thereby causing the engaging protrusion 26 to be attached to the rear end of the elongated hole 24. move towards.

At this time, the shutter member 22 is moved from the first position to the second position against the biasing force of the linear spring 28.

Further, by moving the shutter member 22 from the first position to the second position, the front peripheral wall portion 16a of the housing 14
The first and second parallel extending portions of the linear spring 28 extending leftward or rightward while being parallel to the spring rotate toward the front about the spring support member 32 and provide spring support. It slides on the member 32 and moves further to the left or right than the position shown in FIG.

Therefore, the tip end 36 of the linear spring 28 is connected to the reel hub 1.
0, and rotation of the reel hub 10 is allowed.

Further, when the tape cassette shown in FIG.
is placed in the retracted position against the biasing force of the biasing body 50 by coming into contact with the front end of the long hole 24 of the housing 14 of the tape cassette, so that the engaging protrusion 26 in the long hole 24 24 can be moved from the rear end to the front end.

Then, the shutter member 22 is moved from the second position to the first position by the urging force of the central portion of the linear spring 28.

Also, by moving the shutter member 22 from the second position to the first position, the housing 14 of the tape cassette
The first and second parallel extending portions of the linear spring 28 that extend leftward or rightward in parallel to the front circumferential wall portion 16a of the spring 28 rotate rearward about the spring support member 32 as a fulcrum. At the same time, it slides on the spring support member 32 and moves to the right or left in the exact opposite direction to when the tape cassette is mounted on the tape cassette mounting section 38.

Accordingly, the tip 36 of the linear spring 28 re-engages the lower end 34 of the reel hub 10 and prevents the reel hub 10 from rotating.

As described in detail above, the magnetic recording tape protection device for a tape cassette of this invention has a magnetic recording tape wound around a reel hub, a peripheral wall, and a peripheral wall that holds both ends of the reel hub rotatably. A housing configured with a pair of supported end walls and housing the reel hub and the magnetic recording tape; and an insertion window formed continuously from the peripheral wall of the housing to one of the end walls.

A tape cassette comprising: a first position in which only the portion formed on one of the end walls of the insertion window is closed; and a second position in which the portion of the insertion window is unclosed.
a shutter member provided in the housing so as to be movable between the shutter member and the shutter member, which is formed through the peripheral wall and extends along the mounting direction to the tape cassette mounting portion of an electrical device using the tape cassette; a long hole, and a locking member that is formed integrally with the shutter member and is disposed in the long hole, and that is provided in the tape cassette mounting portion when the tape cassette is mounted on the tape cassette mounting portion of the electrical equipment. an engaging protrusion that moves in the elongated hole by engaging with the mating claw and moves the shutter member from the first position to the second position; and an engaging protrusion provided in the housing of the tape cassette. a central portion that urges the shutter member to the first position; and a central portion that extends from the central portion and engages the reel hub when the shutter member is placed in the first position, thereby preventing rotation of the reel hub. a linear shape having both ends that are elastically deformed by movement of the shutter member from the first position to the second position and allow rotation of the reel hub by releasing engagement with the reel hub; Since the structure is equipped with a spring, the portion formed on one end wall of the insertion window is closed by the shutter member except when the tape cassette is installed in the tape cassette installation section, and the above-mentioned No external stress is applied to the magnetic recording tape from the above portion of the insertion window.

Therefore, the magnetic recording tape will not be deformed or damaged by being pressed in the width direction by the external stress when the tape cassette is carried or stored, and moreover, the magnetic recording tape will not be deformed or damaged by the external stress from the portion formed on the peripheral wall of the insertion window. It can be pulled out into space without being deformed or damaged.

In addition, the reel hub around which the magnetic recording tape is wound cannot rotate while the shutter member closes the above-mentioned part of the insertion window, so even if you carry the tape cassette, the vibrations caused by carrying it This prevents the magnetic recording tape from loosening from its normal running path in the housing of the tape cassette, and prevents the magnetic recording tape from loosening from the above-mentioned portion of the insertion window into the external space.

The above-mentioned embodiments are for illustrating this invention, and are not intended to limit this invention, and any modifications, improvements, etc. made within the technical scope of this invention are also included in this invention. Needless to say.

For example, from the peripheral wall 16 of the housing 14 to one end wall 18
The number of insertion windows 20 continuously formed is not limited to a plurality of pieces, and may be one.

[Brief explanation of drawings]

1 and 2 show an embodiment of this invention, and FIG. 1 is a partially cutaway perspective view showing a tape cassette and the tape cassette mounting part of an electrical device using this tape cassette. 2 are perspective views showing the tape cassette shown in FIG. 1 with the upper housing component and the magnetic recording tape removed. 10... Reel hub, 12... Magnetic recording tape, 14... Housing, 16...
... Peripheral wall, 18 ... End wall, 20 ... Insertion window, 22 ... Shutter member, 24 ...
・Elongated hole, 26...Engaging protrusion, 28...
Linear spring, 30...Tip of linear spring 28, 31...Tape cassette attachment part, 48.
...Engagement claw.

Claims (1)

[Claims for Utility Model Registration] The above-mentioned device is composed of a magnetic recording tape wound around a reel hub, a peripheral wall, and a pair of end walls that are held apart from each other by the peripheral wall and rotatably support both ends of the reel hub. A tape cassette comprising a reel hub and a housing for storing the magnetic recording tape, and an insertion window formed continuously from the peripheral wall of the housing to one of the end walls, wherein one of the insertion windows is a shutter member provided in the housing and movable between a first position where only the portion formed in the end wall is closed and a second position where the portion of the insertion window is unclosed; a long hole formed through the peripheral wall and extending along the mounting direction to the tape cassette mounting portion of an electrical device using the tape cassette; and a long hole formed integrally with the shutter member and inside the long hole. When the tape cassette is mounted on the tape cassette mounting portion of the electrical device, the shutter member an engaging protrusion that moves the shutter member from the first position to the second position; a central portion provided within the housing of the tape cassette that urges the shutter member to the first position; and extending from the reel hub when the shutter member is placed in the first position to engage the reel hub to prevent rotation of the reel hub and move the shutter member from the first position to the second position. a linear spring having both ends that are elastically deformed by movement and disengaged from the reel hub to allow rotation of the reel hub;
A magnetic recording tape protection device for a tape cassette, comprising: