JPS63167454A - Write protector device - Google Patents

Abstract

PURPOSE:To improve the detecting accuracy of a write protector piece, by bringing a detecting piece into contact with the side of a cartridge magnetic tape and the write protector piece, and detecting a difference between both detecting pieces. CONSTITUTION:When the write of the cartridge magnetic tape 30 is prohibited, the recessed part 31b of the write protector piece 31 is set its face up, and the detecting piece 2c of an arm 2 is brought into contact with the recessed part 31b. Also, the detecting piece 3c of an arm 3 is brought into contact with the side 30a of the tape 30. No sensor 8 is operated in such state. Next, when the write of the tape is permitted, a projecting part 31a is set its face up, and the detecting piece 2c is brought into contact with the the projecting part 31a. Therefore, a relative position between the detecting piece 2c and the detecting piece 3c is varied, and the arm 2 presses the operating piece of the sensor 8, then, operates it. In such way, it is possible to improve the detecting accuracy of the write protector piece in spite of the size tolerance of a device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a write protector device that detects a write protector piece of a cartridge magnetic tape.

[Prior Art] FIG. 5 is a plan view showing a conventional light protector device.

A write protector piece 31 is attached to the 1/2 inch cartridge 1jix tape (hereinafter referred to as cartridge) 30.
The write protector piece 31 is provided on one side 30a of the cartridge 30, and has a protrusion 31a and a recess 3 (2b) formed on its peripheral surface. 2b is exposed, and a write protector device comprising a microswitch or the like detects the write protector piece 31 of the cartridge 30.

Therefore, if the user wishes to prohibit writing to the cartridge or disc 30, he or she may rotate the write protector piece 31 to expose the concave portion 3 (2b), and when writing is permitted, the convex portion of the write protector piece 31 may be exposed. When the light protector device 32 is exposed, these convex portions 31a and four portions 3 (
2b to electrically determine which state it is in.

[Problems to be Solved by the Invention] FIG. 6 is an enlarged side sectional view of the write protector piece 31 of the cartridge magnetic tape 30.

In this figure, a convex portion 31a of the light protector piece 31
The difference a between the case where the recess 3 (2b) is exposed and the case where the recess 3 (2b) is exposed is as small as 2.8 mm. The write protector device 32 will no longer be able to normally detect the write protector piece 31. This means that the write protector piece 31 of the cartridge 30 or the reference position of the write protector device 32 will always be A-A.
This problem can be solved by positioning in line, but in order to do this, in addition to increasing the dimensional accuracy during manufacturing, a special mechanism is required, and maintenance of the entire system is required. At the time of manufacturing, the cartridge 30
The sum of the dimensional tolerances of each component for positioning was extremely close to the difference of 2.8 mm, making it impossible to improve the detection accuracy of the light protector device a32.

Furthermore, in current magnetic tape devices, the cartridge 30 can be inserted in various directions, such as horizontally or vertically.
For example, in the case of a magnetic tape device in which the cartridge 30 is inserted vertically from above, the write protector device 32 must be retracted from the cartridge 30 when the cartridge 30 is inserted. Therefore, it is difficult to improve the detection accuracy of the write protector device 32. It has become even more difficult.

The write protector device of the present invention has been developed in view of the above circumstances, and provides a write protector device that can detect the write protector piece of a cartridge with high precision regardless of the tape positioning accuracy or the dimensional tolerance of the magnetic tape device. Another object of the present invention is to provide a write protector device in which the coating itself can move forward and backward with respect to the tape and can detect write protector pieces with high precision.

[Means for Solving the Problems] In order to solve the above problems, in the first invention, a write protector piece (
a first detection piece (2c) which can freely come into contact with the cartridge magnetic tape (31); and a second detection piece which can come into contact with one side (30a) of the write protector piece (31) of the cartridge magnetic tape (30). (3c) and; the first detection piece (2c) and the second detection piece (2c) which can freely come into contact with each other;
3c) changes from the first state before abutting on the light protector piece (31) and the one side (30a), respectively, to the first state where the first detection piece (2C) becomes the light protector piece and the second
Both the detection pieces (2c) and (3c) are moved parallel to each other in the corresponding direction while reaching the second state where the detection piece (3C) is in contact with the one side (30a) of the cartridge magnetic tape (30). The present invention is characterized by comprising: means (10) for detecting; and a sensor (8) for detecting a difference in the positions of both detection pieces (2c) and (3c) in the second state.

Further, in the second invention, a write protector piece (31) of the two-cartridge magnetic tape (30) can be brought into contact with the write protector piece (31).
First detection piece (2c); Cartridge magnetic tape (3
0) on one side of the light protector piece (31) (30
a); a second detection piece (3c) which can freely come into contact with the first detection piece (3c); The first detection piece (2c), (3c) is provided with the second detection piece (2c), (3c). one end (2a) of the second arm (2), (3);
(3a); and a rotation shaft (1c) provided in the first. The other ends of the second arms (2) and (3) (2b
), (3b) to determine the position (6c), (6d)
and a rotary member (6) having a rotary member (6), which is connected to the rotary member (6) and is movable up and down, so that the first. Second detection piece (2c)
, (3c) in the same direction around the rotation axis (1C); and the first detection piece (2c) and the second detection piece (3c).
and a sensor (8) for detecting the difference between the first and second cartridge magnetic tapes (30). Second detection piece (
2c) and (3c) are characterized by being able to move forward and backward.

[Function] First, the first function of the write protector device. Second arm 2.
3 is retracted from the cartridge magnetic tape 30 (
(first state), then this cartridge magnetic tape 3
The light protector piece 31 of No. 0 contacts the detection piece 2c of the first arm 2, and the side edge 3 near the write protector piece 31
0a contacts the detection piece 3c of the second arm 3 (second
condition).

In order to prevent the user from writing to the cartridge magnetic tape device 30, the recess 3 of the write protector piece 31 (
2b is exposed, the detection piece 2c of the first arm 2
enters the recess of the write protector piece 31, and the detection piece 3c of the second arm 3 comes into contact with the side 30a of the cartridge magnetic tape 30. The positional relationship between the detection piece 2c of the first arm 2 and the detection piece 3c of the second arm 3 remains unchanged.
Sensor 8 does not operate.

On the other hand, the protrusion 31a of the write protector piece 31 allows the user to write to the cartridge magnetic tape device 30.
is exposed, the detection piece 2c of the first arm 2 is
The detection piece 3C of the second arm 3 comes into contact with the side 30a of the cartridge magnetic tape 30. The detection piece 2c of the first arm 2 has a shape that protrudes from the detection piece 3c of the second arm 3, but the side 30a of the cartridge magnetic tape 30 and the protrusion 31a of the write protector piece 31 are Since they are located on the same plane, the first arm rotates with respect to the second arm 3, and the lower part of the other end 2b of the first arm presses the actuating piece of the sensor 8.

The sensor 8 has these two states of operation and two of non-operation states.
It can be detected as a value signal, and an electrical signal can be sent to a discriminating circuit (not shown).

[Example] Hereinafter, an example of the write protector device of the present invention will be described.

FIGS. 1(a) and 1(b) are a plan view and a side view showing an embodiment of the first invention.

The light protector device shown in the figure is provided on a base 1, and a second arm 3 and a first arm 2 are movable. The mutual division of the second arm 29.3 is
It is configured to be detected by a sensor 8 provided on the second arm 3.

The first arm 2 and the second arm 3 are movable on the angle 1d on the base 1, and are biased in the direction of arrow B by springs 7c and 7d, and the respective detection pieces 2c and 3c are The position is determined by rings 2d and 3d on each arm. and.

The difference between these detection pieces 2c and 3c is equal to the difference between the protrusion 31a and the recess 3 (2b) of the write protector piece 31, and the detection piece 2c protrudes.

The base 1 also moves the cartridge 30 by the moving mechanism 10.
It is free to move in any direction. This moving mechanism 10 is a rack 10a provided at the bottom of the base 1.

It is composed of a drive rod lOb provided at the bottom of the cartridge 30 and biased toward the cartridge 30 by a spring 10d, a rack 10a, and a gear 10c between the actuation rod fob.

The cartridge magnetic tape 30 is inserted from above into the write protector device.

The operation of the above configuration will be explained.

First, when the cartridge 30 is not inserted,
The base 1, the detection piece 2c of the first arm on the base 1, and the detection piece 3c of the second arm on the base 1 are in a retracted state from the cartridge (first state B).

Next, when the cartridge 30 is inserted from above, the 1 actuation rod 10b is pressed downward.The 0 actuation rod 10b rotates the gear 10c and moves the base 1 on the rack 10a toward the cartridge 30. .

As a result, the write protector piece 31 of the cartridge magnetic tape 30 comes into contact with the detection piece 2C of the first arm 2, and the side 30a near the write protector piece 31 comes into contact with the detection piece 3c of the second arm 3. (second state).

In order to prevent the user from writing to the cartridge magnetic tape device 30, the recess 3 of the write protector piece 31 (
To explain the case where 2b is exposed, Figure 2 (
As shown in a), the detection piece 2C of the arm 2 with <ff1l enters the recess of the light protector piece 31, and the second arm 3
The detection piece 3c is located on the side 3 of the cartridge magnetic tape 30.
It contacts 0a. The detection piece 2c of the first arm 2 and the second
The positional relationship of the detection piece 30 of the arm 3 remains unchanged, and the sensor 8
doesn't work.

On the other hand, to explain the case where the user exposes the convex portion 31a of the write protector piece 31 in order to permit writing by the cartridge magnetic tape device 30, as shown in FIG. 2(b), the detection of the first arm 2 The piece 2C contacts the convex portion of the write protector piece 31, and the detection piece 3C of the second arm 3 contacts the side 30a of the cartridge magnetic tape 30. The detection piece 2C of the first arm 2 has a shape that protrudes from the detection piece 3c of the second arm 3,
Since the side 30a of the cartridge magnetic tape 30 and the convex portion 31a of the write protector piece 31 are located on the same surface, the arm Sl moves relative to the second arm 3, and the first
The lower part of the other end 2b of the arm presses the actuating piece of the sensor 8.

The sensor 8 has these two states of operation and two of non-operation states.
It can be detected as a value signal, and an electrical signal can be sent to a discriminating circuit (not shown).

After that, when the cartridge 30 is removed, the operating rod 10b of the moving mechanism 10 returns upward due to the spring force.
The base l also returns to its initial state.

Furthermore, in the above embodiment, the base l is moved by the moving mechanism 10, but when the present invention is applied to a cartridge magnetic tape device in which the cartridge 30 is inserted from the horizontal direction, the base l is moved by the moving mechanism 10. It can be fixed and the mobile alO removed.

FIG. 3 is a schematic diagram showing an embodiment of the second invention.

The light protector device shown in the figure is provided on a fixed base 1, and a second arm 3 and a first arm 2 are movable. The difference between the second arms 2 and 3 is detected by a sensor 8 provided on the second arm 3.

One end 1a of the fixed base l supports a drive rod 5 that is movable up and down, and the other end (2b) pivotally supports approximately the center of the rotating member 6.

The rotating member 6 is formed of an 'Lr-shaped angle, and one end 6
a is connected to the drive rod 5, and the other end 6b is connected to the drive rod 5.
Flange portions 6c and 6d are formed respectively.

Further, the other end portion (2b) of the base 1 supports the first arm 2 and the second arm 3 by respective support shafts 1c.

The second arm 3 is formed in an L-shape, and three detection pieces 3C are provided above one end 3a, and a bottom portion 3d located below the first arm 2 is provided below the other end 3b.
is set up in a bent manner. And the second arm piece 3
A tension spring 7a is stretched between the bottom 3d of the second arm 3 and the rotating member 6, and the rotating member 6 is connected above the other end 3b of the second arm 3.
is biased in the direction of the flange portion 6C. Furthermore, a sensor 8 made of a microswitch is fixedly attached to the bottom 3d of the second arm 3.

The first arm 2 is also formed in the same shape as the second arm 3, and an inspection piece 2C that protrudes further than the detection piece 3C of the second arm 3 is formed above the one end 2a. The detection piece 2C of the first arm 2 is the detection piece 3C of the second arm 3.
This 2.8 mm is equal to the difference between the convex portion 31a and the concave portion 3 (2b) of the write protector piece 31 of the cartridge magnetic tape 30, and the other end 2b of the first arm 2. A tension spring 7b is stretched between the rotating member 6 and the collar 6d, and the first arm 2
The upper part of the other end 2b is biased toward the flange 6d of the one-turn member 6. Furthermore, the lower part of the other end 2b of the arm 2 of f51 is positioned above the sensor 8, and this sensor 8 is operated.

Next, FIG. 4(a) shows the operation of the above configuration.

This will be explained using the operation diagram in (b).

The cartridge magnetic tape 30 is inserted from above the write protector device.

First, in the light protector device, the drive rod 5 moves upward and the rotating member 6 rotates about the support shaft 1c. The second arms 2 and 3 are retracted from the cartridge magnetic tape 30. Thereafter, when the drive rod 5 moves downward, the write protector piece 31 of the cartridge magnetic tape 30 comes into contact with the detection piece 2C of the first arm 2, and the side 30a near the write protector piece 31 is
It contacts the detection piece 3C of the second arm 3.

In order to prevent the user from writing to the cartridge magnetic tape device 30, the recess 3 of the write protector piece 31 (
To explain the case where 2b is exposed, Fig. 4 (
As shown in a), the detection piece 2C of the first arm 2 enters the recess of the write protector piece 31, and the detection piece 3C of the second arm 3 enters the side 30a of the cartridge magnetic tape 30.
comes into contact with. The positional relationship between the detection piece 2C of the first arm 2 and the detection piece 3C of the second arm 3 remains unchanged, and the sensor 8 is
Do not work.

On the other hand, to explain the case where the user exposes the convex portion 31a of the write protector piece 31 in order to permit writing on the car ridge magnetic tape charge 30, as shown in FIG. 4(b), the first arm The second detection piece 2C comes into contact with the convex portion of the write protector piece 31, and the second detection piece 3C of the second arm 3 comes into contact with the side 30a of the cartridge magnetic tape 30. The detection piece 2C of the first arm 2 has a shape that protrudes from the detection piece 3C of the second arm 3.
Since the side 30a of the cartridge magnetic tape 30 and the convex portion 31a of the write protector piece 31 are on the same plane, the first arm rotates with respect to the second arm 3, and the first arm rotates with respect to the second arm 3.
The lower part of the other end 2b of the arm presses the actuating piece of the sensor 8.

The sensor 8 has these two states of operation and two of non-operation states.
It can be detected as a value signal, and an electrical signal can be sent to a discriminating circuit (not shown).

In the above embodiment, the write protector device is used for a magnetic tape device in which the cartridge magnetic tape 30 is inserted from above. By fixing the cartridge magnetic tape 30 in a horizontally protruding state, it can also be used in a magnetic tape device in which the cartridge magnetic tape 30 is inserted horizontally.

Further, at this time, the rotating member 6 can be integrated with the base 1 and the drive rod 5 can be removed.

[Effects of the Invention] As explained above, the write protector device according to the present invention can detect the write protector piece of the cartridge magnetic tape with high precision.

Furthermore, the device itself can move forward and backward with respect to the cartridge magnetic tape, and even if the cartridge magnetic tape is inserted in the upward direction, this can be accommodated.

[Brief explanation of the drawing]

FIGS. 1(a) and (b) are a plan view and a side view showing a light protector device according to the first invention, and FIGS. 2(a) and (b) are
) is an operational diagram of the same device, and Figure 3 is. A perspective view showing a light protector device according to a second invention,
Figures 4(a) and (b) are operational diagrams of the device, and Figure 5 is:
FIG. 6, which shows a conventional write protector device, is an enlarged sectional view showing a write protector piece of a cartridge magnetic tape. lc...Rotation axis, 2...First arm, 2a...
one end, 2b...other end, 2c...first detection piece, 3.
...Second arm, 3a...one end, 3b...other end,
3c... Second detection piece, 5... Drive shaft, 6... Rotating member, 6c. 6d...Brim portion, 10...Movement mechanism, 10a...
Rack, 10b... Operating rod, 10c... Gear, 30
... Cartridge rjiki tape, 30a river side,
31...Light protector piece. Patent Applicant Anri Co., Ltd. NEC Corporation Agent/Patent Attorney Norimitsu Nishimura Figure 2 (a) Figure 2 (b) 1 2 1d '/C2CJla Figure 3 Figure 4 (b) Figure 5 Δ Figure 6

Claims (2)

[Claims] (1) A first detection piece (2c) that can freely come into contact with the write protector piece (31) of the cartridge magnetic tape (30); one side of the write protector piece (31) of the cartridge magnetic tape (30); a second detection piece (3c) that can freely come into contact with the side (30a); the first detection piece (2c) that can come into contact with the side (30a);
3c) changes from the first state before abutting on the light protector piece (31) and the one side (30a), respectively, to the first state where the first detection piece (2c) becomes the light protector piece and the second detection piece (2c) becomes the light protector piece.
Both the detection pieces (2c) and (3c) are moved parallel to each other in the corresponding direction while the detection piece (3c) reaches the second state in which it comes into contact with the one side (30a) of the cartridge magnetic tape (30). A light protector device comprising: a means (10) for detecting the condition; and a sensor (8) for detecting a difference in position between the detection pieces (2c) and (3c) in the second state. (2) a first detection piece (2c) that can freely come into contact with the write protector piece (31) of the cartridge magnetic tape (30); one side of the write protector piece (31) of the cartridge magnetic tape (30); a second detection piece (3c) that can freely come into contact with the side (30a); first and second arms (2) provided with the first and second detection pieces (2c) and (3c); (3) One end (2a), (
a rotation shaft (1c) provided at the other end (2b) of the first and second arms (2), (3);
), (3b) flange portions (6c), (6d) for positioning
a rotating member (6) having a rotation member (6), and a rotating member (6) that is connected to the rotating member (6) and is movable up and down, and thus has a first and second detection piece (2c).
, (3c) in the same direction around the rotation axis (1c); and the first detection piece (2c) and the second detection piece (3c).
and a sensor (8) for detecting the difference between the first and second detection pieces (
2c) and (3c) are light protector devices that can move forward and backward.