JPH05205385A - Disk recording/reproducing device - Google Patents

Abstract

PURPOSE:To make the opening/closing of a case window possible only by retracting a protected magnetic head at an inserting/ejecting position and inserting/ejecting a cartridge case. CONSTITUTION:A magnetic head lowering/rising section 40a is rotated integrally with cartridge holder 41 and a head spring 51 is lifted. The rotative fulcrum O of the head spring 51 is positioned on a rotative tip side more than the rotative fulcrum L of the magnetic head lowering elevating section 40a. A head shutter 43 is brought closest to a magnetic head 50 at the inserting/ejecting position and at a recording/reproducing position, it is moved to the other end of a sliding range by a shutter arm 42. One end of a shutter guide angle 45 is rotated by a cartridge case 10a to be inserted and a shutter guide 46 is slided to the hanging hole 13b of a shutter 13 with the other end. As the cartridge 10a is inserted, a case window 16 opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording / reproducing apparatus for recording / reproducing a disk housed in a portable protective case such as a disk cartridge, and more particularly to a disk cartridge for the disk recording / reproducing apparatus. The present invention relates to a loading mechanism that operates in association with insertion.

[0002]

2. Description of the Related Art An example of a currently proposed recording / reproducing system for a magneto-optical disk will be described with reference to FIG. The recording method shown in FIG. 19 is called a magnetic field modulation overwrite method, and new data can be recorded while erasing the data already recorded on the magneto-optical disk.

Specifically, the magnetic head 2 and the optical pickup 1 face each other via the disk 3, and the optical pickup 1 collects the light near the center of the region where the magnetic head 2 applies a magnetic field to the disk 3. The temperature is raised by the laser light beam. The direction of the applied magnetic field, in other words, the magnetization direction of the perpendicular magnetization film of the disk 3 due to the thermomagnetic effect is modulated according to the energization direction of the magnetic coil of the magnetic head 2.

There are two known types of reproduction systems, a rewritable disc and a reproduction-only disc. Both systems try to reproduce the recorded information by irradiating the disc 3 with laser light and detecting the optical modulation of the reflected light. However, in the case of a rewritable disc, the polarization plane of the reflected light called the Kerr effect is used. The rotation direction is detected, and in the case of a read-only disc, the intensity modulation of reflected light is detected.

As described above, since the rewritable disc and the read-only disc differ greatly in correspondence between the devices,
Even in the form of a disc protective case such as a so-called disc cartridge, it has been proposed that the type of the disc accommodated therein can be clearly discriminated. The protective case is indispensable for protecting the disc from damage and adhesion of dust and making the disc portable. A shutter is provided in the protective case, and the shutter is opened when the protective case is attached to the magneto-optical disk device.

However, in the case of a rewritable disk protective case, windows are provided on both the front surface and the back surface, and when the shutter is opened, the magnetic head and the optical pickup approach the disk through the respective windows. However, it faces the disc. On the other hand, in the case of the protective case for the read-only disc, the window is provided only on one surface on the optical pickup side, and when the shutter is opened, the optical pickup approaches the disc through the window and faces the disc. ing.

Further, when the conventional protective case is mounted on the magneto-optical disk device, whether or not recording is possible is determined as follows. That is, as shown in FIGS.
A hole 11b is formed on, for example, the upper surface of the hole 1, and the hole 11b is closed by the slide member 25 in the recordable state. The slide member 25 has, for example, an L shape, and the hole 11
It is mounted so that it can be slid on the side surface near b. Therefore, in the unrecordable state, as shown in FIG.
As shown in 18, slide the slide member 25 to open the hole 11b.

The open / closed state of the hole 11b is as follows.
It is detected by a switch 26 with a terminal 26a positioned with respect to b. That is, when the hole 11b is closed by the slide member 25, the terminal 26a is pushed into the switch 26, so the switch 26 is turned on.
Then, the recordable state is detected. On the other hand, the hole 11b
When is open, the terminal 26a is in a free state, so that the switch 26 is turned off and the recording disabled state is detected.

By the way, in the conventional magneto-optical disk apparatus, the protective case 4 is horizontally inserted from the front side of the apparatus as shown in FIG. 20 in consideration of the stability of the apparatus and the protection of the magnetic head or the optical pickup. A loading method called front loading is adopted. Therefore, the operator was not likely to touch the magnetic head provided in the apparatus.

[0010]

However, the presently proposed magneto-optical disk device tends to be compact in size, and as shown in FIG. 21, a loading method called top loading is about to be adopted. There is. In this method, when opening the upper lid of the device and inserting the protective case 4, a mechanism is required to rotate the magnetic head in conjunction with the upper lid and avoid the magnetic head so as not to come into contact with the inserted protective case 4. And Therefore, in the magneto-optical disk device adopting the top loading method, the first problem is to develop this head operating mechanism.

If the magnetic head is constructed so as to always access the recording / reproducing portion after the protective case 4 is mounted, if the protective case 4 is a protective case for a read-only disc, the magnetic head is It will come into contact with the surface of the protective case and be damaged. This is because, as described above, the read-only disc protective case does not have the window portion that faces the magnetic head to the disc. Therefore, the correspondence on the device side must be changed according to the type of disc. This is the second issue.

Further, when the upper lid of the apparatus is opened, the degree of exposure inside the apparatus is increased, so that the magnetic head particularly disposed near the upper lid may be broken or damaged due to scattering of foreign matter or erroneous insertion of the protective case. It has a problem that it is highly likely to be damaged. Therefore, the third problem is to develop a mechanism for protecting the magnetic head when the top cover of the device is opened.

Further, in the currently proposed protection case for a magneto-optical disk, in order to prevent the disk from being exposed outside the apparatus, a lock mechanism is provided in the shutter for opening and closing the window of the protection case. Therefore, when inserting or ejecting the protective case into or from the device,
The fourth issue is to develop a mechanism that opens and closes the shutter by turning the lock of the shutter ON / OFF in conjunction with ejection.

Further, as described above, when it is attempted to detect the open / closed state of the hole formed in the protective case by electrically turning on / off the switch in order to determine whether or not recording is possible, the magnetic head is brought closer to the disk. The mechanism is severely constrained, and it is inevitable to have a complicated configuration that has both an electrical system and a mechanical system. Therefore, the fifth problem is to make it possible to determine whether or not recording is possible with a simple configuration.

[0015]

In order to solve the above-mentioned problems, a disk recording / reproducing apparatus according to the invention of claim 1
It is rotated between an insertion / ejection position where a disc-shaped record carrier (for example, a rewritable optical disc or a read-only optical disc) is inserted and ejected, and a recording / reproduction position where recording / reproduction is performed on the disc-shaped record carrier. Record carrier holding means (for example, a cartridge holder) for holding the disc-shaped record carrier and arranging it at the recording / reproducing position
On the disc-shaped record carrier arranged at the recording / reproducing position,
In a disk recording / reproducing apparatus provided with a magnetic head means (for example, a magnetic head) approaching for applying a magnetic field,
A magnetic head biasing means (for example, a head spring) that rotatably supports the magnetic head means and biases the magnetic head means in a direction from the insertion / ejection position to the recording / reproducing position, and the record carrier holding means. The magnetic head rotating means for rotating the magnetic head urging means in the same direction as the record carrier holding means from the recording / reproducing position to the insertion / ejection position by integrally rotating the magnetic head (for example, a magnetic head rotating means). And a magnetic head elevating part) provided, and the fulcrum of rotation of the magnetic head urging means is set closer to the magnetic head means than the fulcrum of rotation of the magnetic head rotating means.
The rotation angle of the magnetic head means from the recording / reproducing position to the insertion / ejection position is larger than the rotation angle of the record carrier holding means.

In order to solve the above-mentioned problems, the disc recording / reproducing apparatus according to the second aspect of the present invention inserts and ejects a protective casing (for example, a cartridge case) for accommodating and protecting the disc-shaped record carrier. A record carrier holding means for rotating between an inserted and ejected position and a record / reproduce position where recording / reproduction is performed on the disc-shaped record carrier, and retaining the protective casing and arranging the record / reproduce position. A disk recording / reproducing apparatus provided with a magnetic head means for approaching the disk-shaped record carrier for applying a magnetic field through a window portion opened in the protective housing when the protective housing is arranged at a recording / reproducing position. A magnetic head urging means (for example, a head suspension) that rotatably supports the magnetic head means and urges the magnetic head means in a direction from the insertion / ejection position to the recording / reproducing position. Ring), and the magnetic head means abuts on the surface of the protective casing by abutting on the surface of the protective casing when the window is not opened in the protective casing located at the recording / reproducing position. It is characterized in that the magnetic head urging means is provided with an abutting means (for example, a protrusion) for preventing this.

In order to solve the above-mentioned problems, a disk recording / reproducing apparatus according to a third aspect of the present invention accommodates and protects the disk-shaped record carrier, and exposes a part of the disk-shaped record carrier during recording / reproduction. And a protective housing provided with a sliding member (for example, a shutter) that has a portion formed therein and that opens and closes the window portion by sliding, and has an engagement hole used for opening and closing. A disk recording / reproducing apparatus including a record carrier holding means for holding a housing and arranging the record carrier in the recording / reproducing position, the first rotating end and the second rotating end, the first rotating end holding the record carrier. Rotating means (for example, shutter guide angle) pivotally supported so that the second rotating end approaches the record carrier holding means when it is separated from the means.
And an opening / closing means (for example, a shutter guide) that has an engaging portion that fits into the engaging hole and that moves forward and backward with respect to the record carrier holding means by the rotation of the second rotating end. When one rotation end is rotated by contact with the tip of the protective housing to be inserted, the engagement portion of the opening / closing means is fitted into the engagement hole by the rotation of the second rotation end, The opening / closing means holds the sliding member so that the window is opened as the protective housing is inserted.

In order to solve the above-mentioned problems, a disk recording / reproducing apparatus according to a fourth aspect of the present invention has an insertion / ejection position at which insertion and ejection of a protective casing for accommodating and protecting a disk-shaped record carrier are performed. , Record carrier holding means for rotating between a recording / reproducing position at which recording / reproducing is performed on the disk-shaped record carrier and holding the protective casing and arranging at the recording / reproducing position, and recording / reproducing of the protective casing. In a disk recording / reproducing apparatus provided with a magnetic head means that approaches the disk-shaped record carrier for applying a magnetic field according to the position of the magnetic head means, the magnetic head means is rotatably supported and A magnetic head urging means (for example, a head spring) for urging the recording medium holding means so as to approach the recording medium holding means, and a magnetic head regulation slidably attached to the recording medium holding means. The magnetic head means is a step, and the magnetic head means is brought into contact with a protective housing abutting portion (for example, a cartridge abutting portion) which comes into contact with a protective housing inserted into the record carrier holding means and the magnetic head biasing means. A support contact portion (for example, a raised piece) that separates from the holding means, and the amount of sliding of the support contact portion with respect to the magnetic head biasing means in accordance with the movement of the protection casing contact portion due to the insertion of the protection casing. Magnetic head regulating means (for example, a head guide) for adjusting the amount of approach of the magnetic head means to the record carrier holding means, and the magnetic head regulating means has its sliding range when the protective casing is ejected. The support contact portion abuts against the magnetic head urging means to move the magnetic head means farthest from the record carrier holding means. The more you support, the better Amount sliding is increased relative to the magnetic head urging unit parts, is characterized in that regulation of the proximity to the recording carrier holding means of the magnetic head means is released gradually.

In order to solve the above-mentioned problems, a disk recording / reproducing apparatus according to a fifth aspect of the present invention performs an insertion / ejection position at which the disk-shaped record carrier is inserted and ejected and recording / reproduction on / from the disk-shaped record carrier. A magnetic field is applied to a recording carrier holding unit that rotates between a recording / reproducing position to be executed and holds the disc-shaped record carrier and disposes at the recording / reproducing position, and a disc-shaped record carrier disposed at the recording / reproducing position. A disk recording / reproducing apparatus provided with a magnetic head means approaching for application, comprising a protection portion (for example, a guard) for protecting the magnetic head means, and wherein the disk-shaped record carrier is inserted and ejected along the above-mentioned direction. A magnetic head protection means (for example, a head shutter) slidably attached to the record carrier holding means and a magnetic head are interlocked with the rotation of the record carrier holding means. An interlocking device (for example, a shutter arm) that slides the protection unit on the record carrier holding unit, and the protection unit comes closest to the magnetic head unit when the record carrier holding unit is located at the insertion / ejection position. As described above, when the magnetic head protection means is located at one end of the sliding range and the record carrier holding means rotates to the recording / reproducing position, the protection part is remote from the magnetic head means. The magnetic head protection means is moved to the other end of the sliding range so as to allow the disk-shaped record carrier to approach.

According to a sixth aspect of the present invention, there is provided a disk recording / reproducing apparatus in which, in order to solve the above-mentioned problems, the magnetic head regulating means according to the fourth aspect further protects the magnetic head means. For example, a head protection plate)
When the protective casing is ejected, the magnetic head regulating means is located at one end of the sliding range so that the protective portion comes closest to the magnetic head means, and the magnetic head regulating means is inserted when the protective casing is inserted. The means moves towards the other end of the sliding range,
The closer the magnetic head means is to the record carrier holding means side,
The protection part is characterized in that it is remote from the magnetic head means.

[0021]

According to the structure of claim 1, since the fulcrum of rotation of the magnetic head urging means is set closer to the magnetic head means than the fulcrum of rotation of the magnetic head rotating means, the magnetic head is urged. When the means is rotated by the magnetic head rotation means against the biasing force, the rotation angle of the magnetic head biasing means from the recording / reproducing position to the insertion / ejection position is the rotation angle of the magnetic head rotation means. Get bigger.

In other words, since the record carrier holding means and the magnetic head rotating means rotate integrally, the rotation angle of the record carrier holding means from the recording / reproducing position to the insertion / ejection position is
The rotation angle of the magnetic head means supported by the magnetic head biasing means becomes larger. As a result, in the insertion / ejection position, the magnetic head means is remote from the record carrier holding means. That is, the magnetic head means is retracted to a position where it avoids contact with the inserted disk-shaped record carrier.

According to the second aspect of the invention, the magnetic head urging means is provided with a contact means for contacting the surface of the protective casing when the window is not opened in the protective casing located at the recording / reproducing position. Therefore, the magnetic head means supported by the magnetic head urging means is prevented from coming into contact with the surface of the protective casing. When the window is opened in the protective housing arranged at the recording / reproducing position, the contact means does not prevent the magnetic head means from approaching the disk-shaped record carrier through the window.

According to the third aspect of the invention, when the first rotating end of the rotating means is rotated so as to be pushed away by the contact with the tip of the protective housing to be inserted, the second rotating end causes the recording. Rotate to approach the carrier holding means. Then, since the opening / closing means moves toward the record carrier holding means, the engaging portion of the opening / closing means is fitted into the engaging hole formed in the sliding member of the inserted protective housing.

On the other hand, since the rotating means is pivotally supported, the position of the sliding member fitted by the engaging portion is maintained.
Therefore, since the sliding member and the protective housing move relatively with the further insertion of the protective housing, the window portion of the protective housing is opened. Thereby, when the protective housing is inserted into the record carrier holding means, the disc-shaped record carrier is exposed through the window portion, and recording / reproducing becomes possible.

According to the structure of claim 4, when the protective casing is ejected, the magnetic head restricting means is located at one end of the sliding range, and the supporting abutting portion abuts the magnetic head urging means. The magnetic head means is moved farthest from the record carrier holding means. As a result, when the protective housing is inserted and ejected, the magnetic head means avoids contact with the protective housing and retreats.

On the other hand, when the protective case is inserted into the record carrier holding means, the protective case contact portion is pushed by the protective case, so that the magnetic head restricting means moves toward the other end of the sliding range. That is, since the sliding amount of the support contact portion with respect to the magnetic head biasing means increases, the regulation of the approach of the magnetic head means to the record carrier holding means is gradually released.

At this time, in the protective housing accommodating the disk-shaped record carrier in which the recording can be rewritten using the magnetic head means, the protective housing contact portion is moved by the maximum amount, while the read-only disk-shaped record carrier is used. If the protective housing is configured so that the protective housing abutting portion is moved less than the maximum amount described above, the protective housing that accommodates the record carrier holding means of the magnetic head means may be different depending on the type of the disk-shaped record carrier. The amount of access to the means can be changed.

That is, in the case of a protective housing containing a rewritable disk-shaped record carrier, it is necessary to bring the magnetic head means close to the disk-shaped record carrier. By maximizing the amount of movement, the restriction on the approach of the magnetic head unit to the record carrier holding unit can be released. Also, in the case of a protective housing containing a read-only disk-shaped record carrier, the magnetic head means needs to be retracted, so the amount of sliding of the support contact portion with respect to the magnetic head biasing means should be less than the maximum. Thus, it is possible to prevent the magnetic head means from coming into contact with the protective casing.

According to the structure of claim 5, when the record carrier holding means is located at the insertion / ejection position, the magnetic head protection means is located at one end of its sliding range, and the protection portion is closest to the magnetic head means. It is possible to protect the magnetic head means. Further, when the record carrier holding means rotates to the recording / reproducing position, the interlocking means slides the magnetic head protecting means on the record carrier holding means, so that the protector is remote from the magnetic head means. The access of the magnetic head means to the disk-shaped record carrier is not impeded.

According to the structure of claim 6, in the state where the protective casing is ejected, the magnetic head restricting means according to claim 4 is located at one end of the sliding range, and the protective portion is located on the magnetic head means most. The magnetic head means can be protected in close proximity. When the protective housing is inserted into the record carrier holding means, the protective housing abutting portion is pushed by the protective housing.
The magnetic head restricting means moves toward the other end of the sliding range. As a result, the more the restriction on the approach of the magnetic head means to the record carrier holding means is released, the more the protective section is remote from the magnetic head means, so that the approach of the magnetic head means to the disk-shaped record carrier is not hindered.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, there will be shown a disk recording / reproducing apparatus in which a recording medium is a magneto-optical disk compatible with a magnetic field modulation system and a protective case is a disk cartridge. The disc recording / reproducing apparatus of the present embodiment includes at least a loading mechanism for arranging the disc cartridge at the recording / reproducing position while holding the disc cartridge, and a magnetic head operating mechanism for bringing the magnetic head closer to the disc during the recording / reproducing operation. And a player mechanism including an optical pickup and a disc drive system.

First, the structure of the currently proposed disk cartridge will be described below with reference to FIGS. 13 and 14. First, as shown in FIG. 13A, in the box-shaped cartridge case 10a for storing the rewritable disc 12a, the side face located on the insertion side of the device and perpendicular to the insertion direction is the insertion end face 10a ₁ and the cartridge case 10a. When the is properly inserted into the device, the side face located on the right side with respect to the insertion direction is the right side face 10a ₂ , the side face located on the left side with respect to the insertion direction is the left side face 10a ₄ , and the side face located on the discharge side with respect to the device is the discharge direction. Side face perpendicular to the discharge end face 10
a ₃ .

Similarly, as shown in FIG. 14A, in the box-shaped cartridge case 10b for accommodating the read-only disc 12b, the side surface corresponding to the insertion end surface 10a ₁ is the insertion end surface 10b ₁ and the right side surface 10a. _The side face corresponding to ₂ is the right side face 10b ₂ , the side face corresponding to the left side face 10a ₄ is the left side face 10b ₄ , and the side face corresponding to the discharge end face 10a ₃ is the discharge end face 10b ₃ .

Now, as shown in FIG. 13A, a rewritable disk 1 for a magnetic head, which will be described later, is provided near the right side surface 10a ₂ of the cartridge case 10a.
A case window 16 is formed to expose a part of 2a. Assuming that the surface on which the case window 16 is formed is the surface, FIG.
As shown in (d), a case window 15 is formed on the back surface at the same position as the case window 16 so as to expose a part of the rewritable disc 12a to the optical pickup described later.

Further, in the vicinity of the insertion end surface 10a ₁ and the discharge end surface 10a ₃ on the back surface, there are formed recesses 19 used for positioning when the cartridge case 10a is arranged at a predetermined position in the disk recording / reproducing apparatus. There is. Further, as shown in FIG. 13C, a recess 22a having a depth d ₁ is formed with respect to the back surface at one location on the ridgeline formed by the back surface and the insertion end surface 10a ₁ . Recess 22a
Is used for disc type determination, as described below.

On the other hand, in order to prevent the cartridge case 10a from being inserted by mistake in the wrong direction, the left side surface 1
0a ₄ and the right side surface 10a ₂ are formed with grooves 21a and 21b starting from the insertion end surface 10a ₁ .
The length of the groove 21b is set, for example, close to the length of one side of the cartridge case 10a, while the length of the groove 21a is less than half the length of one side of the cartridge case 10a, for example. Is set to.

A shutter 13 for opening and closing the case windows 15 and 16 has an arrow AB shown in FIG. 13B.
Direction, that is, the cartridge case 10a is slidably attached along the insertion / ejection direction. The shutter 13 is a case window 15 in the cartridge case 10a.
A shutter lock 18 provided in the vicinity of 16 locks the shutter lock position at a closed position and prevents sliding in the B direction. The shutter lock 18 includes a rotating arm 1 having a claw portion 18a that engages with a bent portion 13a formed at an end portion of a side surface of the shutter 13.
8b and the contact arm 18d have a substantially V-shape that is pivotally supported at the fulcrum M.

When the rotating arm 18b is pushed in the direction of the arrow R shown in FIG. 13 (d), the bending portion 13a and the claw portion 18a are disengaged by the rotation around the fulcrum M, and the shutter 1
3 can slide to the open position. Since the contact arm 18d is in contact with the pin 23 provided upright in the cartridge case 10a, immediately after the engagement between the bent portion 13a and the claw portion 18a is disengaged, the rotating arm 18b is connected to the contact arm 18d. The elasticity of returns to the original position.

As shown in FIG. 13 (b), on the side surface of the shutter 13, there is formed a hook hole 13b for engaging with a shutter opening / closing mechanism (described later) of the disk recording / reproducing apparatus.

The box-shaped cartridge case 10a for storing the rewritable disc 12a has been described above. However, the box-shaped cartridge case 10b for storing the reproduction-only disc 12b is the cartridge case 10.
Only the difference from a will be described.

As shown in FIG. 14D, since the read-only disk 12b does not require a magnetic head, only the case window 15 for the optical pickup is formed on the back surface of the cartridge case 10b. Therefore, the shutter 14 has a single-sided structure. The depth d _{2 of} the recess 22b corresponding to the recess 22a is set deeper than the depth d ₁ so that the recess 22b can be distinguished from the cartridge case 10a. Other than that, the cartridge case 10a and the cartridge case 10b have the same configuration.

[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. A case where the cartridge case 10a of the cartridge cases 10a or 10b is mainly attached to the disk recording / reproducing apparatus will be described.

As shown in FIG. 1, side plates 6 are provided on both sides of the main chassis 70 of the disk recording / reproducing apparatus.
0.61 is provided vertically to the main chassis 70. The cartridge holder 41 is the main chassis 7
0 for guiding the insertion of the cartridge case 10a and holding the cartridge case 10a after the insertion. Each end on both sides of the cartridge holder 41 is
Shaft 60 erected at each end of side plates 60 and 61
It is pivotally supported by a. 61a. As a result, FIG.
As shown in, the cartridge holder 41 rotates in the X and Y directions in the drawing within a predetermined angle range regulated by a shutter arm 42 described later.

Here, the insertion opening side of the cartridge holder 41 is located at the front of the disc recording / reproducing apparatus, and the shaft 60a.
The arrangement side of 1a is determined as the rear part of the disk recording / reproducing device, and the front part and the rear part of other members are also in conformity with this.

As shown in FIG. 1, the cartridge holder 4
On the surface of No. 1, a holder window 41i is formed corresponding to the position of the case window 16 of the inserted cartridge case 10a. Similarly, on the back surface, windows (not shown) are formed corresponding to the positions of the case windows 15 of the cartridge case 10a. Then, in the vicinity of the holder window 41i, an opening / closing mechanism for the shutter 13 mainly including the shutter guide angle 45 and a protection mechanism for the magnetic head 50 mainly including the head shutter 43 are provided. And
Both of these mechanisms constitute the above-mentioned loading mechanism.

First, the opening / closing mechanism of the shutter 13 will be described with reference to FIGS. A protrusion 41j protruding toward the side plate 61 is formed near the center of the bottom of the right side surface of the cartridge holder 41. Protrusion 4
A shaft 41b is vertically provided on 1j so as to face the main chassis 70 side and serves as a center of rotation of the shutter guide angle 45. A pin 45a is provided upright on the front end of the shutter guide angle 45. At the bottom of the right side surface of the cartridge holder 41 near the pin 45a, a bifurcated protrusion 41 is formed.
k is formed, and the slit holes 4 are formed in both legs of the protrusion 41k.
1c are formed respectively.

A shutter guide 46 guided by these slit holes 41c is provided in the cartridge holder 41 so as to be movable back and forth. The projecting end of the shutter guide 46 engages with the hooking hole 13b of the shutter 13 described above. The shutter guide 46 is biased toward the side plate 61 by a spring (not shown) while contacting the pin 45a. For this reason, the shutter guide angle 45 itself is shown in FIG.
It is urged in the direction of the arrow Q inside.

A pin 45b is also provided upright on the rear end of the shutter guide angle 45. A part of the right side surface of the cartridge holder 41 is cut out in the vicinity of the pin 45b (see FIG. 2), and as a result of the pin 45b entering the cartridge holder 41, a right shoulder portion 10a _{R of the} cartridge case 10a to be inserted is formed. It comes in contact.

Next, the protection mechanism of the magnetic head 50 will be described. The head shutter 43 is provided so as to be movable along the insertion / ejection direction with respect to the guide shafts 41e and 41f that are provided upright on the right side surface of the cartridge holder 41. The main part includes a side surface part 43d, an upper surface part 43c, and a guard 43b.

The side surface portion 43d is horizontally long and has a rectangular shape whose vertical width is substantially equal to the thickness of the cartridge holder 41, and the guide shaft 41e.
Two slit holes for guiding 41f are formed.
The upper surface portion 43c extends at a right angle from the upper portion of the side surface portion 43d onto the cartridge holder 41, and when the head shutter 43 is located at the rear end of its movable range, the upper surface portion 43c is positioned directly below the magnetic head 50 described later. It has been adjusted. The guard 43b stands upright in front of the upper surface 43c, and protects the magnetic head 50 from the erroneously inserted cartridge case 10a, invading foreign matter, and the like.

The movable end of the shutter arm 42 is the side surface 4
The shutter arm 42 is rotatably supported by a shaft 43a provided upright on the side 3d, and the fixed end of the shutter arm 42 is rotatably mounted on the side plate 61.

When the cartridge holder 41 accommodating the cartridge case 10a is rotated toward the main chassis 70 by the protection mechanism of the magnetic head 50, the head shutter 43 moves in the direction of arrow C in FIG. 2, that is, the cartridge case 10a. Slide in the discharge direction. And FIG.
As shown in, when the cartridge holder 41 is rotated in the Y direction to the recording / reproducing position that is closest to the main chassis 70, the head shutter 43 is located at the foremost end of the movable range. At this time, the magnetic head 50 faces the rewritable disk 12a through the holder window 41i and the case window 16.

On the other hand, as shown in FIG. 2, when the cartridge holder 41 is rotated in the X direction to the insertion / ejection position of the cartridge case 10a, the head shutter 43 slides in the arrow D direction, that is, the insertion direction of the cartridge case 10a. It moves and is located at the end of the range of motion. At this time, the guard 43b is closest to the magnetic head 50 lifted to the retracted position.

In addition, in the vicinity of the center of the right side surface of the cartridge holder 41, an inwardly bent portion 41a which projects into the cartridge holder 41 and rotates the shutter lock 18 when the cartridge case 10a is inserted is formed. (See FIG. 1). The inner bent portion 41a is
As will be described later, the cartridge case 1 in the wrong direction
It also has a role of not allowing the insertion of 0a. In addition, a ridge 41h described later is formed near the rear edge of the holder window 41i.
It may be formed along the trailing edge if necessary. Further, on the rear surface of the cartridge holder 41, the insertion end surface 10a ₁ of the cartridge case 10a to be inserted (see FIG.
The positioning bent portion 41g for contacting with (see (a)) and for determining the insertion stop position is formed.

On the other hand, the ceiling cabinet 40 is attached so as to cover the cartridge holder 41. By bending the front end of the ceiling cabinet 40 toward the cartridge holder 41 and providing the bent portion 40b, erroneous insertion of the cartridge case 10a can be completely prevented. In addition,
A magnetic head elevating part 40a which is hung from the ceiling cabinet 40 and bent below a head spring 51 described later.
Is located at a notch in the rear right corner of the upper surface of the cartridge holder 41.

Next, the magnetic head operating mechanism will be described. The head spring 51 is composed of a U-shaped curved strip spring. One of the U-shaped legs is fixed to an optical pickup 73 (see FIG. 4) provided in the main chassis 70 so as to face the magnetic head 50. The other of the U-shaped legs has a cartridge holder 41.
Is a movable portion that rotates on the upper surface side, and the above-described magnetic head 50 is attached to the movable end thereof. The magnetic head 50 has the elasticity of the head spring 51.
The head spring 51 is biased toward the cartridge holder 41 with the vicinity of the center of curvature O of the curved portion of the head spring 51 as a fulcrum.

When the cartridge holder 41 is rotated in the X direction to the insertion / ejection position of the cartridge case 10a, the head spring 51 causes the cartridge holder 41 to move.
At a rotation angle larger than that of the magnetic head 5
0 avoids contact with the cartridge case 10a and saves.

In order that the head spring 51 can obtain a proper rotation angle, the above-mentioned magnetic head elevating part 40a is used.
Is arranged below the head spring 51. That is, since the center of curvature O is located inside the fulcrum L of the ceiling cabinet 40 and the cartridge holder 41, the cartridge holder 41 is placed in the cartridge case 1.
When rotated to the insertion / ejection position of 0a, the rear part of the magnetic head elevating part 40a abuts the inside of the head spring 51, and the head spring 51 is lifted at a larger rotation angle.

A protrusion 51c for detecting the open / closed state of the case window 16 of the inserted cartridge case 10a is formed on the rear side of the magnetic head 50 and on the back surface of the head spring 51.

The magnetic head 50 is attached to the cartridge holder 41.
FIG. 5 shows another configuration for urging toward the direction. Figure 5
As shown in (a), the plate-shaped head arm 92 having the magnetic head 50 at the tip is vertically inserted in the longitudinal direction by a pin 93 near the rear end. As a result, the head arm 92 can rotate about the pin 93 as a spindle.

A head base 90 is attached to both ends of the pin 93 so as to straddle the head arm 92. As shown in FIG. 5B, the head base 90 is
It has an upper vertical portion and a lower vertical portion that extend vertically from the pin 93. The lower vertical portion is fixed to the optical pickup 73. The upper vertical portion slightly stands up and is bent to the rear end side of the head arm 92.
Is bent to form the head arm contact portion 90a.

The head arm contact portion 90a regulates the range of rotation of the head arm 92. That is, when the magnetic head 50 is brought into contact with the rewritable disk 12a, the head arm contact portion 90a may be formed short or not formed at all. Therefore, the positional relationship between the magnetic head 50 and the rewritable disk 12a can be adjusted by the length of the head arm contact portion 90a.

Rewritable disk 1 for head arm 92
A torsion spring 91 having two legs 91a and 91b is attached to one end of the pin 93 to urge it toward the 2a side. The tip of one leg 91a abuts and is fixed to the upper surface of a protrusion 92a formed near the center of the side portion of the head arm 92, and the tip of the other leg 91b is opened to twist the torsion spring 91, The head base 90 is fixed by abutting on the rear surface of a protrusion 90b formed at the bottom of the head base 90. As a result, both feet 91a and 91b try to close their legs, and the head arm 92 is urged toward the rewritable disk 12a with respect to the fixed head base 90.

Next, the player mechanism shown in FIG. 4A will be described. The turntable 71 and the spindle motor 72 that rotationally drive the rewritable disk 12a are
It is arranged to the left of the diagonal center of the main chassis 70. At the time of recording / reproducing, the rewritable disc 12 a is placed on the turntable 71.

On the other hand, the rear portion of the optical pickup 73 is loosely fitted to a guide shaft 82 arranged in parallel with the front surface or the rear surface of the main chassis 70. A rack gear 74 is attached to the rear surface of the optical pickup 73. The rotational force of the carrier motor 55 is the same as that of the gears 76, 7
It is transmitted to the rack gear 74 via 7, 78, 79, 80, 81 in order and converted into a linear motion.

As a result, the optical pickup 73 and the magnetic head 50 slide the guide shaft 82 while the optical pickup 73 slides on the guide shaft 82 while the irradiation beam center of the rewritable disk 12a and the magnetic field application center are always aligned with each other. The rewritable disc 12a moves in the radial direction.

Further, as shown in FIG. 4B, shafts 70a and 70b are erected on the main chassis 70, and the recesses 19 are formed at two positions on the back surface of the inserted cartridge case 10a. Insert into the cartridge case 1
The mounting position of 0a is determined.

A loading operation for the cartridge case 10a having the above-mentioned structure will be described. As shown in FIG. 2, as the cartridge case 10a is inserted into the cartridge holder 41 standing at the insertion / ejection position of the cartridge case 10a, the following series of operations occur.

(1) Inner bent portion 4 of the cartridge holder 41
1a pushes the rotating arm 18b of the shutter lock 18 toward the inside of the cartridge case 10a. As a result, the rotating arm 18b rotates about the fulcrum M in the R direction, and the bent portion 13a of the shutter 13 and the claw portion 18a are disengaged from each other.

(2) The right shoulder portion 10a _{R of the} further inserted cartridge case 10a has the shutter guide angle 4
While contacting the pin 45b of No. 5, the shutter guide angle 45 is rotated in the P direction toward the outside of the cartridge holder 41.

(3) As a result, the pin 45a moves the shutter guide 46 toward the inside of the cartridge holder 41.
It fits in the hanging holes 13b on the three side surfaces.

(4) The shutter 13 has a shutter guide 46.
As the cartridge case 10a is further inserted, the shutter 13 relatively opens and the case windows 15 and 16 open.

(5) The insertion end surface 10a ₁ of the cartridge case 10a that is further inserted is the cartridge holder 41.
The insertion is completed by abutting on the positioning bending portion 41g on the rear portion.

Subsequently, when the ceiling cabinet 40 is rotated in the Y direction toward the main chassis 70, the following series of operations occur.

(6) Since the lifting of the magnetic head 50 by the magnetic head elevating part 40a of the ceiling cabinet 40 is gradually released, the biasing force of the head spring 51 causes
The magnetic head 50 approaches the rewritable disk 12a via the holder window 41i and the case window 16.

(7) Since the head shutter 43 slides forward as the shutter arm 42 rotates, the head shutter 43 does not prevent the magnetic head 50 from approaching.

(8) The cartridge holder 41 is mounted on the main chassis 70, and the magnetic head 50 contacts the rewritable disk 12a.

(9) The cartridge case 10a is fixed by fitting the shafts 70a and 70b into the concave portion 19 of the cartridge case 10a.

(10) The cartridge holder 41 is attracted by, for example, a magnet (not shown) attached to the back side of the upper surface of the main chassis 70, and is urged toward the main chassis 70 by a constant force.

(11) The rewritable disk 12a is placed on the turntable 71 and can be rotated by the rotational force of the spindle motor 72.

By the way, the cartridge case 10b for accommodating the reproduction-only disc 12b is the cartridge holder 4
1 is inserted into the cartridge case 10b in the above (8), the protrusion 51c of the head spring 51 is
The magnetic head 50 is held in a position where it does not come into contact with the top surface of the cartridge case 10b because it first comes into contact with the top surface.

In this embodiment, the cartridge case 10a
Although the case where the magnetic head 50 contacts the rewritable disk 12a in the completed loading state of the head is shown, as described above, the ridge 41h is formed on the upper surface of the cartridge holder 41, and the back surface of the head spring 51 is ridge 41h. The magnetic head 50 may be held in the rewritable disk 12a with a predetermined gap by abutting against.

The insertion of the cartridge case 10a in the wrong direction is prevented as follows. First, when the front and rear of the cartridge case 10a is mistaken, the groove 21
Discharge end face 10a ₃ (FIG. 1) in which a and 21b are not formed
3 (a)) is the inner bent portion 4 of the cartridge holder 41.
It comes into contact with 1a and further insertion becomes impossible. The right side surface 10a ₂ or the left side surface 10 of the cartridge case 10a
It is the same even when trying to insert from a ₄ (see FIG. 13A). In addition, although the front, rear, left, and right directions are appropriate, when the insert is made to face the back, the groove 21a is formed to be short, and therefore the inner bent portion 41a makes it impossible to insert more than the length of the groove 21a.

[Embodiment 2] Another embodiment of the present invention will be described below with reference to FIGS. 6 to 9. For convenience of explanation, members having the same functions as those of the members shown in the drawings of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The disk recording / reproducing apparatus of this embodiment differs from that of the first embodiment in the magnetic head operating mechanism. The magnetic head operating mechanism of this embodiment is the cartridge case 1.
When the cartridge holder 41 accommodating 0a or 10b is rotated and mounted on the main chassis 70, the magnetic head 50 and the cartridge case 10 are changed depending on the kind of the cartridge case, that is, the kind of the disk.
The positional relationship with a or 10b is different. The loading mechanism and the player mechanism are the same as in the first embodiment.

As shown in FIG. 6, the magnetic head operating mechanism of this embodiment is interlocked with the operation of inserting the head spring 151 having the magnetic head 50 at its tip and the cartridge case 10a or 10b into the cartridge holder 41. It is composed of a head guide 44 which is also interlocked with the rotation operation of the cartridge holder 41 accommodating the cartridge case 10a or 10b.

The head spring 151 is provided with a head guide contact portion 151a that projects toward the side plate 61 in the vicinity of the notch at the rear right corner of the cartridge holder 41. Other than this, it is the same as the head spring 51.

On the other hand, the head guide 44 has a sliding portion 44a.
A raised piece 44b, a projecting portion 44c, and a cartridge contact portion 44d. The sliding portion 44a slides along the right side surface of the cartridge holder 41 by being guided by the guide pins 41m and 41n provided upright in the vicinity of the cutout portion on the right side surface of the cartridge holder 41. The raised piece 44b is provided vertically to the sliding portion 44a so as to slide on the upper right side surface of the cartridge holder 41, and is formed in a mountain shape. Overhang part 44
The letter c extends from the lower rear side of the right side surface of the cartridge holder 41 to the lower rear side of the cartridge holder 41.
The cartridge contact portion 44d stands up at the end of the overhanging portion 44c.

The head guide 44 is biased in the cartridge case ejection direction by a spring (not shown).

In the above structure, as shown in FIG.
In the state where the cartridge case 10a or 10b is not inserted into the cartridge holder 41, the head guide 44 biased in the cartridge case discharge direction is located at the foremost end of the sliding range, and therefore the mountain-shaped protruding piece 44b.
Contacts the head guide contact portion 151a and lifts the head spring 151, so that the magnetic head 50 is remote from the cartridge holder 41.

When the cartridge case 10a for accommodating the rewritable disc 12a is inserted into the cartridge holder 41, the shutter 13 operates in the same manner as in the first embodiment.
After the cartridge is opened, the insertion end face 1 of the cartridge case 10a is
0a ₁ the above-mentioned recess 22a formed on the lower side (see FIG.
(See (d)) contacts the cartridge contact portion 44d. However, since the recess 22a is formed shallow,
The cartridge contact portion 44d cannot enter the recess 22a.

As a result, as shown in FIG. 8, since the head guide 44 is located at the rearmost end of its sliding range, the raised piece 44b is located behind the head guide contact portion 151a. Therefore, the head spring 151 includes the protruding piece 4
It is rotated toward the cartridge holder 41 by its own biasing force without being disturbed by 4b.

As a result, the magnetic head 50 approaches the rewritable disk 12a via the holder window 41i and the case window 16. Whether or not the magnetic head 50 contacts the rewritable disk 12a can be selected depending on whether or not the raised line 41h is formed on the upper surface of the cartridge holder 41, as in the first embodiment.

On the other hand, as shown in FIG. 9, when the cartridge case 10b for accommodating the reproduction-only disc 12b is inserted into the cartridge holder 41, the cartridge contact portion 44d is located below the insertion end surface 10b ₁ of the cartridge case 10b. When contacting the aforementioned recess 22b formed on the side, since the recess 22b is deeply formed, the cartridge contact portion 44d enters into the recess 22b.

As a result, the head guide 44 does not slide to the end of the sliding range by the amount that the cartridge contact portion 44d has entered the recess 22b, so that the protruding piece 44b is located at the rear portion of the head guide contact portion 151a. Is slightly lifted to regulate the rotation of the head spring 151. by this,
Even when the cartridge case 10b is mounted at the recording / reproducing position as shown in FIG. 9, the magnetic head 50 is prevented from coming into contact with the upper surface of the cartridge case 10b through the holder window 41i.

[Embodiment 3] Another embodiment of the present invention will be described below with reference to FIGS. 10 to 12. For convenience of explanation, members having the same functions as those of the members shown in the drawings of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the disk recording / reproducing apparatus of this embodiment, the head shutter 43 is mainly used in the magnetic head operating mechanism.
Instead of removing the shutter arm 42 and the shutter arm 42, a head guide 144 is newly provided in which a structure for protecting the magnetic head 50 is added to the basic structure of the head guide 44.
This differs from the second embodiment.

The head spring 251 is similarly formed with a head guide contact portion 251a at a portion corresponding to the head guide contact portion 151a of the head spring 151. However, the portion corresponding to the head guide contact portion 251a and the mounting portion of the magnetic head 50 has a shape diverted to the side plate 60 side.

The head guide 144 has a sliding portion 1 formed longer than the sliding portion 44a and the raised piece 44b of the second embodiment.
44a and the raised plate 144b, and the projecting portion 1 having the same configuration as the projecting portion 44c and the cartridge contact portion 44d.
44c and the cartridge contact portion 144d, and the sliding portion 1
It is composed of a head protection plate 144e formed in parallel with the raised plate 144b at the front end portion of 44a.

The sliding portion 144a is provided with two slits guided by the guide pins 41q and 41r provided upright on the side surface of the cartridge holder 41.
Is formed in parallel with the insertion / ejection direction. In addition, the head protection plate 144e is provided from the sliding portion 144a to the magnetic head 50.
Head spring 2 with a length exceeding the mounting part of
The movable range is from the recessed portion 251b generated by the intermediate portion of 51 having the detoured shape as described above to just below the mounting portion of the magnetic head 50.

In the above structure, as shown in FIG. 11, the cartridge holder 41 is attached to the cartridge case 10.
In the state where a or 10b is not inserted, the head guide 144 biased in the cartridge case ejection direction is
Since it is located at the foremost end of the sliding range, the raised plate 144b
Contacts the head guide contact portion 251a and lifts the head spring 251, so that the magnetic head 50 is remote from the cartridge holder 41.

Further, as shown in FIG. 10, when the cartridge case 10a for accommodating the rewritable disc 12a is inserted into the cartridge holder 41, after the shutter 13 is opened by the same operation as the first embodiment, the cartridge case 10a is opened. The above-mentioned recessed portion 22a formed in the above-mentioned contact with the cartridge contact portion 144d.

However, since the recess 22a is shallowly formed, the cartridge contact portion 44d cannot enter the recess 22a. As a result, as shown in FIG. 12, since the head guide 144 is located at the rearmost end of the sliding range, the raised piece 144b is located behind the head guide contact portion 251a. Therefore, the head spring 251 is rotated toward the cartridge holder 41 by its own biasing force without being hindered by the raised plate 144b.

As a result, the magnetic head 50 has the holder window 4
Rewritable disc 1 through 1i and case window 16
Approach 2a. Whether or not the magnetic head 50 contacts the rewritable disk 12a can be selected depending on whether or not the raised line 41h is formed on the upper surface of the cartridge holder 41, as in the first embodiment.

On the other hand, although not shown in the drawing, when the cartridge case 10b for accommodating the read-only disc 12b is inserted into the cartridge holder 41, the cartridge contact portion 144d has the above-mentioned recess 22b formed in the cartridge case 10b. Since the recess 22b is formed deep when it comes into contact with the cartridge contact portion 144d, the cartridge contact portion 144d enters the recess 22b.

As a result, since the cartridge abutting portion 144d has entered the recess 22b, the head guide 44 does not slide to the end of the sliding range, so that the raised plate 144b.
Slightly lifts the rear part of the head guide contact portion 151a,
The head spring 251 is restricted from approaching the cartridge holder 41. As a result, even if the cartridge case 10b is mounted at the recording / reproducing position, the magnetic head 5
0 is the cartridge case 10b through the holder window 41i
It is prevented from contacting the upper surface of the.

[0108]

As described above, the disk recording / reproducing apparatus according to the first aspect of the present invention rotatably supports the magnetic head means and moves the magnetic head means from the insertion / ejection position to the recording / reproduction position. By integrally rotating the magnetic head urging means for urging in the direction and the record carrier holding means,
Magnetic head rotating means for rotating the magnetic head urging means in the same direction as the record carrier holding means from the recording / reproducing position to the insertion / ejection position, and the fulcrum of rotation of the magnetic head urging means is Since the magnetic head rotating means is set on the magnetic head means side with respect to the rotation fulcrum, the rotation angle of the magnetic head means from the recording / reproducing position to the insertion / ejection position is larger than the rotation angle of the record carrier holding means. It is a configuration.

Therefore, at the insertion / ejection position, the magnetic head means is remote from the record carrier holding means, so that the magnetic head means is located at a position where contact with the disk-shaped record carrier to be inserted / ejected is avoided.
The magnetic head means can be retracted.

As described above, the disk recording / reproducing apparatus according to the second aspect of the present invention rotatably supports the magnetic head means and moves the magnetic head means from the insertion / ejection position to the recording / reproduction position. A magnetic head urging means for urging is provided, and the magnetic head means is brought into contact with the surface of the protective housing when the window is not opened in the protective housing arranged at the recording / reproducing position, so that the magnetic head means is protected by the protective housing. The magnetic head urging means is provided with contact means for preventing contact with the body surface.

Therefore, it is possible to prevent the magnetic head means from coming into contact with the surface of the protective housing when the window is not opened in the protective housing located at the recording / reproducing position.

As described above, the disk recording / reproducing apparatus according to the third aspect of the present invention has the first rotating end and the second rotating end, and the first rotating end separates from the record carrier holding means. A rotation means pivotally supported so that the second rotation end approaches the record carrier holding means, and an engagement portion fitted into the engagement hole, and by the rotation of the second rotation end, Opening / closing means for advancing / retreating with respect to the record carrier holding means, and when the first rotating end is rotated by contact with the tip of the inserted protective housing, the second rotating end is rotated. The engaging portion of the opening / closing means is fitted in the engaging hole, and the opening / closing means holds the sliding member so that the window portion is opened as the protective housing is inserted.

Therefore, since the position of the sliding member fitted by the engaging portion is maintained, the sliding member and the protective housing move relatively with the further insertion of the protective housing, and the protective housing moves. The body window is opened. As a result, it is possible to open and close the window for exposing the disc-shaped record carrier simply by inserting or ejecting the protective casing into or from the record carrier holding means.

As described above, the disk recording / reproducing apparatus according to the invention of claim 4 rotatably supports the magnetic head means and urges the magnetic head means so as to approach the record carrier holding means. A magnetic head urging means, a magnetic head restricting means slidably attached to the record carrier holding means, and a protective housing abutting portion for abutting a protective housing inserted in the record carrier holding means; A support contact portion for contacting the magnetic head biasing means to separate the magnetic head means from the record carrier holding means, and the support contact portion accompanying the movement of the protection housing contact portion due to insertion of the protection housing. Magnetic head regulating means for adjusting the amount of approach of the magnetic head means to the record carrier holding means by the sliding amount of the magnetic head urging means, and the magnetic head regulating means in a state where the protective casing is ejected. The protective housing abutting portion located at one end of the sliding range, the supporting abutting portion abutting the magnetic head urging means to separate the magnetic head means from the record carrier holding means most, and the protective housing abutting portion accompanying insertion of the protective housing. As the amount of movement of the magnetic head increases, the amount of sliding of the support contact portion with respect to the magnetic head biasing means increases, and the restriction of the magnetic head means approaching the record carrier holding means is gradually released.

Therefore, the amount of approach of the magnetic head means to the record carrier holding means is determined by the amount of sliding of the support contact portion with respect to the magnetic head biasing means as the protective housing contact portion moves due to the insertion of the protective housing. Can be adjusted. Therefore, if the protective housing is configured so that the movement amount of the protective housing abutting portion can be changed depending on the type of the disk-shaped record carrier housed therein, the magnetic head means can be changed depending on the type of the disk-shaped record carrier. There is an effect that it is possible to bring the record carrier holding means close to or to retract it.

As described above, the disk recording / reproducing apparatus according to the fifth aspect of the present invention is provided with the protective portion for protecting the magnetic head means, and holds the record carrier along the insertion / ejection direction of the disk-shaped record carrier. A magnetic head protection means slidably attached to the recording medium and interlocking means for sliding the magnetic head protection means on the record carrier holding means in association with the rotation of the record carrier holding means. The magnetic head protection means is located at one end of its sliding range so that the protection portion comes closest to the magnetic head means when the holding means is located at the insertion / ejection position, and the record carrier holding means is When the recording head is rotated to the recording / reproducing position, the magnetic head protection means is moved in the sliding range so that the protection part is remote from the magnetic head means and allows the magnetic head means to approach the disk-shaped record carrier. It is configured to move to the end.

Therefore, when the record carrier holding means is rotated to the recording / reproducing position, the protective portion is remote from the magnetic head means, and does not prevent the magnetic head means from approaching the disk-shaped record carrier. When the record carrier holding means is located at the insertion / ejection position, the protection portion comes closest to the magnetic head means and has the effect of protecting the magnetic head means.

As described above, in the disk recording / reproducing apparatus according to the sixth aspect of the present invention, the magnetic head restricting means according to the fourth aspect further includes a protection portion for protecting the magnetic head means, and the protection is provided. In the state where the housing is ejected, the magnetic head restricting means is located at one end of the sliding range so that the protection part comes closest to the magnetic head means, and the magnetic head restricting means moves as the protective housing is inserted. As the magnetic head unit moves toward the other end of the sliding range and the magnetic head unit approaches the side of the record carrier holding unit, the protective unit is remote from the magnetic head unit.

Therefore, in addition to the effect of the structure of claim 4, when the protective housing is inserted into the record carrier holding means, the protective portion is remote from the magnetic head means, so that the disk-shaped recording of the magnetic head means is performed. There is an effect that the access to the carrier is not hindered and the magnetic head means can be protected by being closest to the magnetic head means in the state where the protective casing is discharged.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration example of a disc recording / reproducing apparatus according to the present invention.

FIG. 2 is a side view showing the disc recording / reproducing apparatus at an insertion / ejection position.

FIG. 3 is a side view showing the disc recording / reproducing apparatus at a recording / reproducing position.

4A is a front view and FIG. 4B is a side view showing a main part of a player mechanism of a disc recording / reproducing apparatus.

FIG. 5 shows another configuration example of the magnetic head urging means (a).
Is a front view and (b) is a side view.

FIG. 6 is a front view showing another configuration example of the disc recording / reproducing apparatus according to the present invention.

FIG. 7 is a side view showing the disc recording / reproducing apparatus at the insertion / ejection position.

FIG. 8 is a side view showing the disc recording / reproducing apparatus in a recording / reproducing position while holding a cartridge case accommodating a rewritable disc.

FIG. 9 is a side view showing the disc recording / reproducing apparatus in a recording / reproducing position while holding a cartridge case for accommodating a reproduction-only disc.

FIG. 10 is a front view showing still another configuration example of the disc recording / reproducing apparatus according to the present invention.

FIG. 11 is a side view showing the disc recording / reproducing apparatus at the insertion / ejection position.

FIG. 12 is a side view showing the disc recording / reproducing apparatus in a recording / reproducing position while holding a cartridge case for accommodating a rewritable disc.

13A is a plan view, FIG. 13B is a side view, FIG. 13C is a front view, and FIG. 13D is a bottom view.

14A is a plan view, FIG. 14B is a side view, FIG. 14C is a front view, and FIG. 14D is a bottom view.

FIG. 15 is an explanatory diagram showing that a conventionally used cartridge case is in a recordable / reproducible state.

FIG. 16 is a perspective view showing that the cartridge case is in a recordable / reproducible state.

FIG. 17 is an explanatory diagram showing that the cartridge case is in a recording / playback disabled state.

FIG. 18 is a perspective view showing that the cartridge case is in a recording / reproducing disabled state.

FIG. 19 is an explanatory diagram showing a recording principle for a rewritable disc.

FIG. 20 is a perspective view showing an example of a conventional disc recording / reproducing apparatus.

FIG. 21 is a perspective view showing another example of a conventional disc recording / reproducing apparatus.

[Explanation of symbols]

 10a Cartridge case (protective housing) 10b Cartridge case (protective housing) 12a Rewritable disc (disc-shaped record carrier) 12b Reproduction-only disc (disc-shaped record carrier) 13 Shutter (sliding member) 13b Hanging hole (engagement hole ) 16 case window (window portion) 40a magnetic head lifting portion (magnetic head rotating means) 41 cartridge holder (record carrier holding means) 42 shutter arm (interlocking means) 43 head shutter (magnetic head protecting means) 43b guard (protecting portion) ) 44 head guide (magnetic head restricting means) 44b raised piece (supporting contact part) 44d cartridge contacting part (protective housing contacting part) 45 shutter guide angle (rotating means) 46 shutter guide (opening / closing means) 50 magnetic Head (magnetic head means) 51 Head spring (magnetic head Urging means) 51c protrusion (contact means) 144 head guide (magnetic head regulation means) 144b raised plate (support contact portion) 144d cartridge contact portion (protection housing contact portion) 144e head protection plate (protection portion) ) 151 Head Spring (Magnetic Head Energizing Means) 251 Head Spring (Magnetic Head Energizing Means)

Claims (6)

[Claims] 1. A disc-shaped record carrier is rotated between an insertion / ejection position at which the disc-shaped record carrier is inserted and ejected and a recording / reproduction position at which recording / reproduction is performed on the disc-shaped record carrier. A disk recording / reproducing apparatus comprising: a record carrier holding means for holding and arranging at the recording / reproducing position; and a magnetic head means for approaching a disk-shaped record carrier arranged at the recording / reproducing position for applying a magnetic field, A magnetic head urging means that rotatably supports the magnetic head means and urges the magnetic head means in a direction from the insertion / ejection position to the recording / reproducing position, and an integral rotation of the record carrier holding means. Magnetic head rotating means for rotating the magnetic head urging means in the same direction as the record carrier holding means from the recording / reproducing position toward the insertion / ejection position by the movement. The rotation fulcrum of the magnetic biasing means is set closer to the magnetic head means than the rotation fulcrum of the magnetic head rotation means, so that the rotation angle of the magnetic head means from the recording / reproducing position to the insertion / ejection position. The disk recording / reproducing apparatus is characterized in that the rotation angle is larger than the rotation angle of the record carrier holding means. 2. An insertion / ejection position at which insertion and ejection of a protective casing for accommodating and protecting a disk-shaped record carrier are performed.
Recording carrier holding means for rotating between a recording / reproducing position where recording / reproducing is performed on the disc-shaped record carrier and holding the protective casing and arranging the protective casing at the recording / reproducing position, and the recording in the protective casing. A disk recording / reproducing apparatus comprising: a magnetic head unit that approaches the disk-shaped record carrier for applying a magnetic field through a window portion opened in a protective casing according to the arrangement at the reproduction position. Means for rotatably supporting the magnetic head means and urging the magnetic head means in the direction from the insertion / ejection position to the recording / reproducing position, and the window is provided in the protective casing arranged at the recording / reproducing position. The magnetic head urging means is provided with a contact means for preventing the magnetic head means from contacting the protective housing surface by contacting the protective housing surface when the portion is not open. Disk recording and reproducing apparatus according to claim Rukoto. 3. A disk-shaped record carrier is housed and protected to form a window portion for exposing a part of the disk-shaped record carrier during recording and reproduction, and the window portion is opened and closed by sliding,
A disk provided with a record carrier holding means for holding the inserted protective casing and arranging it at the recording / reproducing position by using a protective casing provided with a sliding member having an engagement hole for opening and closing. The recording / reproducing apparatus has a first rotating end and a second rotating end, and the second rotating end approaches the record carrier holding means when the first rotating end separates from the record carrier holding means. The rotating means is rotatably supported, and the opening / closing means has an engaging portion to be fitted in the engaging hole, and is opened / closed with respect to the record carrier holding means by the rotation of the second rotating end. When one rotation end is rotated by contact with the tip of the protective housing to be inserted, the engagement portion of the opening / closing means is fitted into the engagement hole by the rotation of the second rotation end, Since the opening / closing means holds the sliding member, the window portion is Disk recording and reproducing apparatus characterized by being the mouth. 4. An insertion / ejection position at which insertion and ejection of a protective housing for accommodating and protecting a disk-shaped record carrier are performed.
Recording carrier holding means for rotating between a recording / reproducing position where recording / reproducing is performed on the disc-shaped record carrier and holding the protective casing and arranging the protective casing at the recording / reproducing position, and the recording in the protective casing. In a disk recording / reproducing apparatus provided with a magnetic head means which approaches the disk-shaped record carrier for applying a magnetic field when arranged at a reproducing position, the magnetic head means is rotatably supported, and the magnetic head means is provided. A magnetic head urging means for urging the recording medium holding means toward the recording medium holding means, and a magnetic head regulating means slidably attached to the recording medium holding means, which is inserted into the recording medium holding means. The protective housing abutting portion that abuts the protective housing, and the support abutting portion that abuts the magnetic head biasing means and separates the magnetic head means from the record carrier holding means. Magnetic head regulating means for adjusting the amount of approach of the magnetic head means to the record carrier holding means by the amount of sliding of the support contact portion with respect to the magnetic head biasing means as the protective casing contact portion moves. In the state in which the protective housing is ejected, the magnetic head restricting means is located at one end of the sliding range, and the supporting abutting portion abuts the magnetic head urging means to separate the magnetic head means from the record carrier holding means most. As the amount of movement of the protective housing abutting portion accompanying the insertion of the protective housing increases, the amount of sliding of the supporting abutting portion with respect to the magnetic head urging means increases, and the magnetic head means moves closer to the record carrier holding means. A disc recording / reproducing apparatus characterized in that restrictions are gradually lifted. 5. A disc-shaped record carrier is rotated between an insertion / ejection position where the disc-shaped record carrier is inserted and ejected and a recording / reproduction position where recording / reproduction is performed on the disc-shaped record carrier. A disk recording / reproducing apparatus comprising: a record carrier holding means for holding and arranging at the recording / reproducing position; and a magnetic head means for approaching a disk-shaped record carrier arranged at the recording / reproducing position for applying a magnetic field, A magnetic head protection unit, which is equipped with a protection unit for protecting the magnetic head unit, and is slidably attached to the record carrier holding unit along the insertion / ejection direction of the disk-shaped record carrier; Interlocking means for sliding the magnetic head protection means on the record carrier holding means in association with the rotation, and the record carrier holding means is positioned at the insertion / ejection position. When the magnetic head protection means is located at one end of its sliding range so that the protection part comes closest to the magnetic head means, and the record carrier holding means rotates to the recording / reproducing position. A disk recording / reproducing device characterized in that the magnetic head protection means is moved to the other end of the sliding range so that the protection part is remote from the magnetic head means and allows the magnetic head means to approach the disk-shaped record carrier. apparatus. 6. The magnetic head restricting means further comprises a protecting portion for protecting the magnetic head means, so that the protecting portion comes closest to the magnetic head means when the protective casing is ejected. The magnetic head restricting means is located at one end of the sliding range, the magnetic head restricting means moves toward the other end of the sliding range as the protective housing is inserted, and the magnetic head means moves toward the record carrier holding means side. 5. The disk recording / reproducing apparatus according to claim 4, wherein the protection unit is remoter from the magnetic head unit as the position is closer.