JPS60163287A - Device for preventing erroneous erasing in recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain a miserasing preventing device to be repeatedly used by forming recessed parts in the case of a jacket storing discs and forming a miserasing preventing claws to be moved by an external moving means so that a detecting means of a recording and reproducing device can be run into the recessed parts. CONSTITUTION:The case 7 of the jacket for storing the discs 1 consists of an upper half 7a and a lower half 7b. Holes 43 are formed in the recessed parts 33 formed in the halves 7a, 7b and each hole 43 is formed like an approximately regular circle so that the detecting means of the recording and reproducing device can be inserted and constituted so as to be opened/closed by a miserasing preventing claw 35. The external moving means is inserted into a long hole 44 and engaged with the engaging hole 37 of the claw 35 and the projected part 3a of an elastic engaging part 36 is locked on the positioning groove 34a or 34b of the recessed part 33. When the projection part 3a is engaged with the groove 34a, the hole 43 is closed and the detecting means is not inserted into the recessed part, so that recording operation is enabled. At the engagement with the groove 34b, the hole 43 is opened and the detecting means is run into the hole 43 to control the recording operation. Thus, the miserasing preventing device enabled to be repeatedly used can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to tape cassettes, disk cassettes, etc. used in recording and reproducing devices that record audio/video information and document information, or reproduce recorded information. This relates to an accidental erasure prevention mechanism such as

Conventional configurations and their problems Tape cassettes and disk jackets containing magnetic tapes, magnetic disks, or optical disks usually have
An erroneous erasure prevention mechanism is provided to prevent recorded signals from being erroneously erased.

For example, in the former tape cassette, a recess is formed at a predetermined position, and so-called accidental erasure prevention claws are integrally provided to close the four parts of the recess, and the tape cassette body also has a concave part formed at a predetermined position. A detection body is provided at a position corresponding to the four parts of 7), and is configured to be able to enter into the recess.

Therefore, for example, in an unused tape cassette, the recess is closed by the accidental erasure prevention claw, and the detection object is not pushed into the recess, so the tape cassette body is in a recordable state and the magnetic field inside the tape cassette is Can be recorded on tape. On the other hand, if you do not want to erase recorded information by mistake, break off the accidental erasure prevention claw of the tape cassette to open the recess.
Since the object to be detected enters the recess, the tape cassette body becomes in a state where recording is not possible, and even if the record button is pressed by mistake, no recording is performed, so the information recorded on the tape is erased. It never happens. However, with such a configuration, when it is necessary to record again, the recess has to be closed off with another member such as adhesive tape, which is a hassle.

On the other hand, in the latter disc rack and throat, as a repeatedly usable accidental erasure prevention mechanism, an accidental erasure prevention claw is formed from a separate member, and the accidental erasure prevention claw is inserted into a recess provided inside the disc jacket housing. Some devices are configured to move the inside of the recess to open or close the hole through which the detection object enters the recess. However, the accidental erasure prevention claw is constructed so that it can be moved using a fingertip, etc., and if it is moved carelessly during handling or storage, it may cause damage to the data when it is attached to a recording/playback device. In some cases, information that should have been recorded was accidentally deleted, or information that should have been recorded was not recorded.

OBJECTS OF THE INVENTION The present invention aims to solve the above-mentioned drawbacks and to provide an accidental erasure prevention mechanism that has a relatively simple structure, is highly reliable, and can be used repeatedly.

Composition of the Invention The accidental erasure prevention device for a recording and reproducing device of the present invention is movable between a first position that enables the recording operation of the recording and reproducing device and a second position that restricts the recording operation of the recording and reproducing device. an erroneous erasure prevention claw having an elastic engagement member; and a first erroneous erasure prevention claw that engages with the elastic engagement member of the erroneous erasure prevention claw.
and a recessed part having a first positioning groove and a second positioning groove respectively positioned at the second position, and the recessed part is formed inside the jacket housing, and the jacket housing A substantially perfect circular detection hole is provided on the outside of the body to face the recess and allows the detection means to enter the recess, and one end of the accidental erasure prevention claw is exposed to the outside. an elongated hole into which a moving means can be inserted, and a retaining hole that engages with the external moving means is provided at one end of the accidental erasure prevention claw exposed to the outside from the elongated hole;
The external moving means is inserted through the elongated hole and engaged with the engagement hole of the erroneous erasure prevention claw, so that the erroneous erasure prevention claw is inserted into the first
and a second position, and the detection hole is configured to be openable and closable by the erroneous erasure prevention claw.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

First, let's talk about the composition of the disc jacket.
This will be explained with reference to FIGS. 4 and 7. In Figure 1,
Reference numeral 1 denotes a disk having a recording area 4 and a non-recording area 5°6', and in the center there is a retainer that engages with a drive section of a disk motor, which will be described later, to rotationally support the disk 1 to the disk motor. A matching hole 3 is formed. 4a indicates the inner recording range of the recording area 4, and 4b indicates the outer recording range. 2 is the outer periphery of the disk 1.

On the other hand, as shown in FIG.
A device consisting of an upper half 7a and a lower half 7b made of injection molded products such as resin, the outer periphery of the upper half 7a and the lower half 7b, and a circular rib portion to be described later. They are welded together to form a substantially rectangular parallelepiped shape as shown in FIG. Each of the upper half 7a and the lower half 7b has a circular center hole 8 approximately in the center, and a disk 1 is arranged so as to be concentric with the center hole 8 and rotatable inside the jacket housing 7. A circular rib 11 surrounding the outer peripheral part 2 of the body, and a head insertion hole 10 for inserting a head to be described later are provided, and a first ring-shaped protrusion 9 is provided on the peripheral part of the center hole 8. Oval rib 1
1, a second ring-shaped protrusion 12 is integrally molded on the inner surface of the upper half 7a and the lower half 77b, respectively. A recess 13 is formed by the first ring-shaped protrusion 9 and the second ring-shaped protrusion 12, and is provided facing the recording area 4 of the disc 1 described above. 4 is configured so that it does not directly contact the inner surface of the jacket housing 7. That is, the disk 1 is placed on the first ring-shaped protrusion 9 and the second ring-shaped protrusion 12, and is rotatably stored in the housing 7. The non-recording area 5 of
The non-recording area 6' of the disc 1 abuts the ring-shaped protrusion 9 and the second ring-shaped protrusion 12, respectively, to protect the recording area 4 of the disc 1 and prevent the disc 1 from being lopsided. Even if a part of the outer peripheral part 2 of the disk 1 is held in contact with the inner peripheral surface 11a of the circular rib 11, the recording area 4 is The outer circumference 9 d of the first ring-shaped protrusion 9 and the inner circumference 12 a of the second ring-shaped protrusion 12 are configured so as not to contact the protrusion 12 . The first ring-shaped protrusion 9, the second ring-shaped protrusion 12, and the circular rib 1 are provided on the disk 1, the upper half 7a, and the lower half 77b, respectively.
The relationship with 1 is as follows.

Outer periphery 9a of first ring-shaped protrusion 9 (inner recording range 4a0 of disc 1 outer recording range 4b of disc 1 <inner periphery 12a of second ring-shaped protrusion 12 <outer periphery 2 of disc 1゜Outer periphery of disk 1 2 Inner periphery of circular rib 11 1 a
o Still stack the upper half 7a and lower half 7b on top of each other and make duck 1. When assembling the housing 7, the circular ribs 11 of the upper half 7a and the circular ribs 11 of the lower half 7b contact each other to form the same circumferential surface, and the disk 1 is completely assembled. The structure is such that dust and the like from the outside do not enter unless the center hole 8 and head insertion hole 10 are opened.

Reference numeral 14 denotes a recess provided on the outer surface of a part of the part where the center hole 8 and the head insertion hole 10 are formed.
A linear guide groove 16 is formed extending along the side edge of the jacket housing 7.

The guide groove 15 is either the upper half 7a or the lower half 77.
It may be provided on either one of b. Further, a protruding piece 16 is provided on the end 14a of the recess 14, and
It is integrally molded so that the cross section with 4 is U-shaped.

On the other hand, at the end 14b of the recess 14, a linear rib 17 is formed on the inner surface of the upper half 7a and the lower half 7b. The opening 47 is configured as shown in FIG.

Reference numeral 18 denotes a shutter having a U-shaped cross section for opening and closing the center hole 8 and the hard hole 10, and is made of, for example, stainless steel or synthetic resin. Shutter 1
8 is the upper half 7a and lower half 7a mentioned above as shown in FIG.
- It is attached slidably in a predetermined direction within the recess 14 provided in the flap 7b. That is, a first groove 18 is formed by pressing or integral molding in the upper part 18 corresponding to the guide groove 15 provided in the recess 14 of the upper flap 7a.
At least two or more semicircular protrusions 19 as shown in the figure.
is formed, and when this protrusion 19 is inserted into the guide groove 16, the shutter 18 is guided by the guide groove 15 and becomes slidable in the directions of arrows A and B as shown in FIG. It is. Note that the protrusion 19 may be formed in a V-shape or a U-shape. On the other hand, shutter 18
Inside the slider 2, as shown by the dashed line in Figure 1, is the slider 2.
1 is arranged, and a protrusion 2 formed on the slider 21
4a, 24b and bent pieces 20a, 20b provided at both ends of the side portion 18c of the shutter 18, each of which is configured to be integrally movable. That is, when the bent pieces 20a, 20b of the shafter 18 are inserted between the protrusions 24a, 24b of the slider 21, the protrusions 24a.

24b, so when the slider 21 moves, the shutter 18 also moves in the same way. Ends 21a, 21 of the trench slider 21
b are fitted into and guided by substantially right-angled guide grooves 26 with arcuate corners, as shown in FIG. 4 or 5, provided on the upper half 7a and the lower half 7b, respectively; As shown in FIG. 2, it is configured to be slidable in the directions of arrows C and D. Although the longitudinal end of the slider 21 is shown bent into an arc shape in FIG. 1, this only shows the state in which it is fitted into the guide groove 26. The slider 21 is constructed of an elastic member such as a plate spring or vinyl chloride, so that the slider 21 normally has a straight shape when removed from the slider 26. Therefore, since the slider 21 can slide freely even if a part of the guide groove 26 is formed in an arc shape, a protrusion 23 is formed at the tip of the slider 21 as shown in FIG. If the projection 23 is inserted into the opening 45 formed along the side plate of the jacket housing 7 by the lower half 7b, the protrusion 23 will fit into the opening 46 as shown in FIGS.
It can be scaled from the inside to the outside, and by engaging with a protrusion provided on a jacket holder, which will be described later, the yarn cutter 18 can be moved in the direction indicated by the arrow.

However, one end 25a of an elastic member 25 made of an elastic member 25 such as a tension spring is fixed to the protrusion 22 of the slider 21, and a pin 27 integrally formed on the inner surface of the bottom half is fixed to the protrusion 22 of the slider 21. Since the other end 25b of the elastic member 26 is locked, the slider 21 is always pulled in the direction of arrow B by the urging force of the elastic member 26. Therefore, since the shutter 18 is also elastically biased in the direction of arrow B, the center hole 8 and the head insertion hole 1o are always completely closed by the shutter 18 as shown in FIG. Intrusion of dust, etc. is prevented. Note that the side portion of the shutter 18 is locked to the side portion 14c of the recess 14, and is stopped at the position shown in FIG. 2 and prevented from moving in the direction of arrow B in the figure. It has become.

On the other hand, the end 18a of the shutter 8 has a second
As shown in Fig. 3, the shutter 18 is slidably inserted into the jacket housing 7 in some form.
Even if a force is applied to push the protruding pieces 16 outward, the protruding pieces 16 may be exposed to force.

The end portion 18a of the tar 18 is configured to abut against the end portion 18a of the
A 0 or 1 shutter 18 configured to always prevent the shutter 18 from expanding and to allow the center hole 8 and the head insertion hole 1o to be opened and closed in good condition at all times.
The bent pieces 20a and 20b of the shutter 18 are
The recess 1 of the jacket housing 7 is inserted from the outside of the jacket housing 7 so as to be sandwiched between the protrusions 24a and 24b of the slider 21 exposed through the opening 47 of the jacket housing 7.
4, it can be easily attached to the jacket housing.

46 is an opening provided opposite to the opening 46 and symmetrical to the opening 46, which is necessary when the disc 1 is, for example, a so-called double-sided disc type that can be used on both sides. On the other hand, in the case of a so-called single-sided disc in which only one side of the disc 10 can be used, the opening 46 is not necessary, but in this case, at least two types of jacket housings are required depending on the type of disc (single-sided disc or double-sided disc). In addition, it becomes impossible to share the jacket casing between the two, resulting in a jacket casing that is relatively expensive in terms of productivity and cost. Therefore, in the jacket housing of the present invention, openings 45 and 46 are formed on both sides of the jacket housing 7, as shown in FIGS. It is configured so that two types of discs, double-sided discs, can be used.

The holes 40 to 43 and the elongated hole 44 are asymmetrically provided in the upper half 7a and the lower half 7b, respectively, and the holes 40 to 43 are used particularly for identifying the type of the disk 1. The hole 42 is provided to determine whether it is a single-sided disc or a double-sided disc.For example, if the hole 42 is left as it is, it will be considered a single-sided disc, or if the hole 42 is left as it is, it will be a single-sided disc, or if the hole 42 is left as it is, it will be considered a single-sided disc, or if the hole 42 is left as it is, it will be a single-sided disc, or if the hole 42 is left as it is, it will be a single-sided disc, or if the hole 42 is left as it is, it will be considered a single-sided disc, or if the hole 42 is left as it is, it will be a single-sided disc, or if the hole 42 is left as it is, it will be considered a single-sided disc. 42 is blocked, it can be determined by operating a microswitch or the like if it is set as a double-sided disc. Holes 40 and 41 are configured in the same way as above, and are used to newly distinguish three types of disks: a record-only disk, a read-only disk, and an erasable disk. For example, hole 4o
If the holes 40 and 41 are closed and the hole 41 is left as is, it is a record-only disk, conversely, if the hole 40 is left as is and the hole 41 is closed, it is a playback-only disk, and if the holes 40 and 41 are each closed, it is an erasable disk. Then, the above three types of discs can be discriminated. Hole 43 is upper half 7
It is a substantially circular detection hole that allows a detection means to be described later to be inserted into the four parts 33 provided inside the lower half 7a and the lower half 7b, and is opened or closed by an erroneous erasure prevention claw 35. It is configured as follows. As shown in FIG. 7, the recess 33 has an accidental erasure prevention claw 35 inside the recess.
A V-shaped first positioning FJ34a and a second V-shaped positioning FJ34a are positioned at a first position that enables the recording operation of the recording and reproducing device, and a second position that restricts the recording operation of the recording and reproducing device, respectively.
The positioning groove 34b is integrally molded. Also, the upper half 7a is opposite to the recess 33 provided in the lower half 7b.
K is provided with a recess 33', as shown by the dashed line in FIG. Movement is restricted. The accidental erasure prevention claw 36 is configured to be movable in the directions of arrows E and F by the recess 33' of the upper half 7a and the recess 33 of the lower half 7b. Also, the accidental erasure prevention claw 35
The protrusion 36a formed in a V-shape at the tip of the elastic engagement member 36 is engaged with the first positioning groove 34a and the second positioning groove 34b of the recess 33 to position it in the recess 33. and is locked in the first position and the second position. Therefore, when the protruding part 36a of the elastic retaining part 36 is engaged with the first positioning groove 34a, the detection hole 43 is
Since it is closed by the erroneous erasure prevention claw 35, the detection means comes into contact with the other end 3ab of the erroneous erasure prevention claw 35 and is not inserted into the recess 33. On the other hand, the protrusion 36a
When the detection hole 43 is engaged with the positioning groove 34b, the detection hole 43 is opened by the movement of the accidental erasure prevention claw 35, so that the detection means can enter into the recess 33. If the latter is set as the first position that enables the recording operation and the second position that restricts the recording operation, the recording operation can be detected by the detection means. The erroneous erasure prevention claw 35 is moved by engaging an external moving means (not shown) with an engagement hole 37 formed in one end 36a of the erroneous erasure prevention claw 35. The retaining hole 37 is formed in a size such that an external moving means such as the nib of a ballpoint pen can be retained therein. Further, on the recess 33', there are provided an elongated hole 44 that exposes the engagement hole 37 to the outside and allows an external moving means to engage with the engagement hole 37, and a window hole 43'. The window hole 43' is provided opposite to the detection hole 43 arranged in the lower half 7b, and in the first position, the accidental erasure prevention claw 36 closes the window hole 43'. Therefore, a part of the accidental erasure prevention claw 35 is desired from the window hole 43'.
In the second position, the accidental erasure prevention claw 35 is in the direction of the arrow E.
The accidental erasure prevention claw 3 is moved from the window hole 43'.
5 is separated and removed, and the accidental erasure prevention claw 3 is inserted from the window hole 43'.
5id cannot be requested. Therefore, window hole 4
Whether the first position is the second position can be determined by whether or not the accidental erasure prevention claw 36 can be seen from 3'.

As described above, the elongated hole 44 is such that the external moving means, such as the nib of a ballpoint pen, passes smoothly through the elongated hole 44 and engages with the engagement hole 37VC of the accidental erasure prevention claw 36. It is sufficient if the width is sufficient, and the width is sufficient to prevent the accidental erasure prevention claw 35 from being inadvertently moved by a fingernail or the like during handling. Specifically, for example, about two throats is sufficient.

As described above, the first positioning groove 34a and the second positioning groove 3
4b is placed on the lower half 77b, but there is also a recess 33 on the upper half 7a.
The same recess (not shown) as in 3 is provided, and the lower half 7
They are configured so that when the side b is turned upward, the movement configuration is the same as that of the erroneous erasure prevention claw 36 described above.

28 is the upper half 7a for identifying the side of a double-sided disc.
, are openings provided opposite to each other in the lower half 7b, and if a micro switch or the like is placed in a position facing the opening 8, it will be possible to insert the jacket housing 7 as shown in FIG. 2, for example. Then, the microswitch is only inserted into the opening 8 and does not operate. However, when the jacket housing 7 is inserted upside down as shown in FIG. 2, the microswitch is activated by coming into contact with the outer side of the housing. At this time, if the former is set as the A side of a double-sided disc, and the latter is set as the B side, the side of the disc can be determined.

31 and 32 are the positioning holes of the jacket housing 7 provided asymmetrically for the upper half 7a, the lower half 7b, and i/(respectively. The reference hole is formed as a substantially positive hole, and the positioning hole 32 is formed as an auxiliary hole as a substantially elongated hole. 48 is the four parts provided on the outside of the upper half 7a and the lower half. Although not shown, a label for displaying the contents of the disc 1, such as recorded information, is pasted inside the disc 48.

Next, disk salmon 1. The operation of this point will be explained with reference to FIG. 2 and FIGS.

Figure 2 shows the Shakerid housing 7 before being inserted into the device.
The center hole 8 and the head insertion hole 10 are completely closed by a shaft 8 to prevent dust from entering into the jacket housing 7 from the outside.

Grasp the label side of the jacket housing 7, and with the shutter 8 side in front as shown by the dashed line in FIG. As the body 7 is inserted in the direction of arrow G, the shell y housing 7 is inserted into the jacket insertion hole 61 and the shell y.
, ) is inserted into the device 49 along the side walls 52a and ts2b of the holder 62. In addition, side walls s2a, s2b
protrusions 53a and 53b are formed on each of the protrusions 53a and 53b, which engage with the protrusion 23 of the slider 21 exposed through the opening 46 of the housing 7 to move the shutter 8 semi-automatically. It is composed of Further, although a detailed explanation will be omitted, the jacket holder 52 is configured to be movable only in the vertical direction (arrow H and direction in FIG. 6) without moving in the insertion direction of the housing 7. Therefore, when the jacket housing 7 is further inserted in the direction of arrow G, the protruding piece 53a.

53b begin to insert into the openings 45, 46, respectively. After that, when the protrusion 23 comes into contact with the protrusion piece 53a, the protrusion 23 is stopped from being inserted into the device 49 by the protrusion piece 53a, so that when the salmon/soto housing 7 is further inserted in the direction of arrow G, , the slider 21 is indicated by arrow C in FIG.
At the same time, the shunter 18 also begins to slide in the direction indicated by the arrow. When the shutter 18 begins to slide in the direction of the arrow, the center hole 8 is opened.
The vine 18 begins to open, and then the head insertion hole 10
are opened, and finally the center hole 8 and the lead insertion hole 1o are completely opened as shown in FIG.

At this time, information is recorded on disk 1 shown in Figure 6 for the first time.
Alternatively, a head 54 for reproducing recorded information, a disk motor 67 for rotating the disk 1, and a clamper (not shown) for holding the disk 1 on the disk motor 57 can be inserted. Salmon.

As shown in FIG. 6, the jacket holder 62
When the jacket housing 7 is inserted into the jacket holder 62 and the center hole 8 and the head insertion hole 10 are completely opened, the jacket housing 7 remains inserted into the jacket holder 62 and moves along the arrow H in FIG.
be lowered in the direction. Reference numeral 60 denotes a base provided inside the device 49, and on the base 60 are mounted the aforementioned rotation means 67 and a positioning post 61 for positioning the head 54 or the rack casing 7 at a predetermined position in the device 49. Detecting means 70 to 74, each of which includes a microswitch or the like, provided for determining the type of disc 1 and disc 1 are arranged at predetermined positions, respectively. The hood 64 is integrally attached to the head substrate 55 and is configured to be movable in the direction of the arrow 1. Reference numeral 56 denotes a guide shaft that is fitted with the seventh board 56 and guides the seventh board 54 in the direction of the arrow. Further, the positioning post 61 has a conical tip 62 as shown in FIG. 6, and is configured to be easily inserted into the positioning holes 31 and 32 of the housing 7. On the other hand, the positioning post 63 has a flat tip, and prevents the salmon and throat housing 7 positioned by the positioning post 61 from further lowering in the direction of arrow H from the predetermined position. It is configured to abut against and block the outside. Therefore, the jacket housing 7
is lowered and the positioning post 61.63 positions the salmon.
When the throat housing γ is installed inside the device 49, the disk 1
is held on a rotating means 67 inserted into the center hole 8 of the lower half 7a by a crank ζ inserted from the center hole 8 of the upper half 7a, not shown. The salmon can be rotated and rotated freely within the housing T, and the above-mentioned 70
The detection means 74 may or may not operate depending on the type of disk 1, but they are activated at the same time to discriminate the disk 10. Here, the detection means 70.71 is provided opposite to the hole 40.41 of the lower half 7b, and if, for example, the hole 40 is blocked by a jig or the like and the hole 41 is the cutoff, Since one end 7sa of the bottle 75 provided on the detection means 70 is pushed in the direction of the arrow because the hole 40 is blocked, the detection means 70 is actuated by the other end 76b of the bottle 75, and the detection means 70 is moved in the direction of the arrow. is ON
state. On the other hand, the detection means 71 detects one end 7 of the bottle 75.
5a is inserted into the hole 41, the detection means 71
Since the switch is not activated and the switch is in the OFF state, this disk 1 is determined to be a recording-only disk. A detection means 72 is provided opposite to the hole 42 of the lower half 7b to determine whether it is a single-sided disk or a double-sided disk, and is turned ON or OFF depending on the state of the hole 42. The detection means 74 is for side discrimination provided opposite the opening 2B of the lower part -77b. The detecting means 73 is configured to be operated directly by the detection means 73 in FIG.
Since it is inserted into the opening 28, it does not operate and the switch is in the OFF state, so the disc 1 is determined to be the A side. Next, the detection means 76 is provided opposite to the detection hole 43 of the lower half 7b and the upper half 7a to prevent erroneous erasure, and detects whether the detection hole 43 is blocked by the erroneous erasure prevention claw 36 or not. It is determined whether the detection means 76 consisting of a microswitch or the like is turned ON or OFF. When the detection hole 43 is closed, the detection means 75 is turned on, and it is determined that the recording operation of the device 49 is possible at this time. Conversely, when the detection hole 43 is open and the detection means 75 is OFF, it is determined that the recording operation of the device 49 is impossible.

When the head 64 is rotated, the head 64 inserted into the head insertion hole 10 of the lower part 7b is moved in the direction of arrow J to record or reproduce information. When taking out the jacket housing 7 from inside the device 49, press the eject switch and a part of the jacket housing 7 will be removed from the front panel 60.
If it is structured so that it pops out further to the outside, then all you have to do is hold the jacket casing 7if by hand and pull it out. Salmon,
When the throat housing 7 is pulled in the direction indicated by the arrow as shown in FIG. 6, the protrusion 23 engages with the protrusion piece 53a of the jacket holder 62 due to the biasing force of the elastic member 26, as shown in FIG. Start moving in the direction of the arrow.

At the same time, the shutter 18 also begins to move in the direction of arrow B, and when the jacket housing 7 is pulled out to a position where the protrusion 23 and the protrusion halo 3a are disengaged, the shutter 18 is automatically moved. The center hole 8 and the head insertion hole 10 are completely closed as shown in FIG. After that, the jacket housing 7 is completely removed from the device 49. If the jacket housing 7 is inserted into the device 49 from the opposite side by mistake, the end of the jacket housing 7 may be attached to the jacket holder 62. protruding piece 63a
, 63b, and is configured such that it cannot be inserted any further.

Effects of the Invention As is clear from the above description, according to the present invention, the erroneous erasure prevention claw is moved using, for example, a pen tip of a ballpoint pen as an external moving means, and the erroneous erasure prevention claw Since the structure is such that the movement position of the claw can be visually confirmed through the window hole, it is not only possible to move the accidental erasure prevention claw with an extremely simple operation, but also the existence of the accidental erasure prevention claw can be confirmed through the window hole. Therefore, the erroneous erasure prevention claw can be reliably positioned at the first position and the second position.

Furthermore, the anti-erasing claw is configured so that it cannot be moved by careless hands during handling or storage, so it is possible to prevent information that should be saved from being accidentally erased or information that should be recorded from being recorded. Therefore, it is possible to provide a highly reliable and repeatedly usable accidental erasure prevention mechanism.

[Brief explanation of the drawing]

Figure 1 shows a disc jacket in one embodiment of the present invention.
Figure 2 is an exploded perspective view showing the structure of the jacket, Figure 2 is a perspective view of the jacket with the shunter closed, Figure 3 is a perspective view of the jacket with the shutter open, Figure 4 is a plan view of the jacket. Figure 5 is a partially sectional plan view of the jacket inserted into the device, Figure 6 is a perspective view showing the jacket positioned in the device, and Figure 7 is a partially sectional plan view of the jacket inserted into the device.
The figure is a perspective view showing the configuration of the accidental erasure prevention claw of the same jacket. 1...disc, 7...jacket housing, 33
... ・Concavity, 34a ...First positioning, 3
4b... Second positioning groove, 35 - Accidental erasure prevention claw, 36... Elastic engagement member, 37 Engagement hole, 43 -
...detection hole, 44...long hole. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Reason 3? 6 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] It is installed in the jacket housing that stores the disc inside.
and an erroneous erasure prevention mechanism for a recording and reproducing device configured to be detected by a detection means provided in the recording and reproducing device and to control a recording operation of the recording and reproducing device, the mechanism being configured to enable the recording operation of the recording and reproducing device. an erroneous erasure prevention claw comprising an elastic engagement member that is movable between a first position for regulating the recording operation of the recording and reproducing device and a second position for regulating the recording operation of the recording/reproducing device; and an elastic engagement of the erroneous erasure prevention claw. a recessed portion having a first positioning groove and a second positioning groove that engage with the mating member to position the accidental erasure prevention claw at a first position and a second position, respectively; (a) a substantially circular detection hole that is provided outside the jacket housing and faces the recess, and that allows the detection means to enter the recess; and a long hole that exposes one end of the accidental erasure prevention claw to the outside and allows an external moving means to be inserted, and one end of the accidental erasure prevention claw that is exposed to the outside from the long hole is provided with the external movement means. A retaining hole that engages with the means is provided, and the external moving means is inserted through the elongated hole and engaged with the engagement hole of the erroneous erasure prevention claw, so that the erroneous erasure prevention claw is moved to the first position. and a second position, and the detection hole is configured to be openable and closable by the accidental erasure prevention claw.