JP2000222859A - Recording and/or reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To thin and miniaturize an entire device. SOLUTION: A device is equipped with a disk tray 3 having first and second recessed parts 4 and 5 where first and second optical disks with a different diameter are placed. In the disk tray 3, a cutout part 7 is formed over an outer periphery while the center of the first and second recessed parts 4 and 5 is included, and a base that enters the cutout part 7 and at the same time has width for breaking away from it is provided. A base 11 is equipped with a disk rotary driving mechanism 12 that rotates and drives the first or second optical disk 1 or 2 being placed at the first or second recessed part, an optical pickup device 13, and a feed mechanism for feeding the optical pickup device 13. When the base 11 enters the cutout part 7, the disk rotary driving mechanism 12 and the optical pickup device 13 enter the cutout part 7, and an information signal for the first or second optical disk 1 or 2 is recorded and/or reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a recording and / or reproducing apparatus using a disc-shaped recording medium such as an optical disk as a recording medium.

[0002]

2. Description of the Related Art Conventionally, in a disk player which is a recording and / or reproducing apparatus using an optical disk which is a disk-shaped recording medium as a recording medium, an optical disk is loaded by using a disk tray which is moved inside and outside the apparatus body. What is used is used.

In this disc player, a disc tray is projected outside the apparatus main body, and can be moved between a first position allowing loading and unloading of an optical disc and a second position retracted into the apparatus main body. The optical disk mounted on the disk tray is loaded to a reproduction position in the apparatus main body by pulling the disk tray to the second position in the apparatus main body.

At a reproduction position in the apparatus main body, a disk rotation driving mechanism for rotating and driving the optical disk placed on the disk tray and reading of an information signal recorded on the optical disk rotated and driven by the disk rotation driving mechanism are performed. An optical pickup device is provided.

[0005] The disk rotation drive mechanism and the optical pickup device are mounted on a base disposed on the lower surface side of the disk tray moved to the second position, and are movable together with the base in a direction approaching and away from the disk tray. Supported. The base is moved in a direction approaching the disk tray when the disk tray is pulled into the second position of the apparatus main body. When the base moves to the disk tray side, the disk table of the disk rotation drive mechanism projects through the cutout provided in the disk tray into the concave portion of the disk tray where the optical disk is placed. When the disk table projects into the concave portion of the disk tray, the optical disk placed in the concave portion floats from the bottom surface of the concave portion and is mounted on the disk table. At this time, the optical pickup device disposed on the base is also moved to a position close to the optical disk mounted on the disk table.

[0006] The base is moved to the disk tray side, the optical disk is mounted on the disk table, and then the disk rotation drive mechanism is driven to rotate the optical disk integrally with the disk table, and the pickup feed mechanism is driven to drive the optical disk. The information signal recorded on the optical disk is reproduced by scanning the signal recording area of the optical disk with the light beam emitted from the optical pickup device while moving the pickup device over the inner and outer circumferences of the optical disk.

[0007]

By the way, various types of disc-shaped recording media such as optical discs having different sizes are used. For example, some optical discs on which audio information or the like are recorded have a diameter of 12 cm and a diameter of 8 cm. In the above-described disc player used for reproducing audio information, both a large-diameter first optical disc having a diameter of 12 cm and a small-diameter second optical disc having a diameter of 8 cm are used. What makes it possible is used.

A disk tray provided in a disk player that can use both a large-diameter first optical disk and a small-diameter second optical disk includes first and second optical disks having different diameters, respectively. In order to enable positioning and mounting, a first concave portion for mounting first optical disks having different diameters and a second concave portion for mounting second optical disks are provided. Have been. The second recess is formed concentrically with the first recess so that the bottom surface of the first recess is depressed one step.

As described above, the notch for allowing a disk table or the like provided on a disk tray used in a disk player capable of using the small-diameter second optical disk together with the large-diameter first optical disk to enter is provided. When a small-diameter second optical disk is placed, the disk is formed with such a small width that the disk does not drop from the second concave portion.

A notch formed in a disc tray used in a disc player which enables the use of first and second optical discs having different sizes has a small width, so that the notch is conventionally used. In this type of disc player, only a portion of a biaxial actuator including a disc table on which an optical disc is mounted and an objective lens of an optical pickup device is inserted into the notch.

As described above, in a disk player in which only the portion of the biaxial actuator including the disk table and the objective lens is inserted into the notch of the disk tray, the base moves in the direction approaching the disk tray side. Even when the disk tray is moved, the main part of the spindle motor for rotating the disk table and the optical block of the optical pickup device are located on the lower surface side of the disk tray together with the base. It is not possible to reduce the thickness, and it is difficult to reduce the thickness of the entire device.

A rotary table is provided in the apparatus main body,
Arrange multiple disk trays on this rotary table,
When the present invention is applied to a disk player having a disk exchange function for selectively playing back the optical disks placed on these disk trays, the rotation table and the disk tray placed on the rotation table can be used. It is necessary to enter a biaxial actuator including a disk table and an objective lens, so that the thickness from the base to the disk tray is further increased, and it is more difficult to reduce the thickness of the entire apparatus.

Further, a plurality of disk trays are stored in a storage section in a multi-stage manner, and any one of the disk trays stored in the storage section is sequentially selected and pulled out, and an optical disk mounted on the disk tray is selected. When the present invention is applied to a disk player that reproduces the data, it is necessary to release the entirety of the base provided with the disk rotation drive mechanism and the optical pickup device to the outside of the disk tray. That is, in order to move the disk rotation drive mechanism and the optical pickup device to a position of an arbitrary disk tray stacked in a multi-stage manner, collision of the disk tray is avoided. As described above, in a disk player configured to allow the entire base on which the disk rotation drive mechanism and the optical pickup device are disposed to escape to the outside of the disk tray, the size of the entire device is increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording and / or reproducing apparatus capable of reducing the overall thickness and size of the apparatus.

It is another object of the present invention to reduce the moving distance of the disk rotation drive mechanism and the optical pickup device, to facilitate the operation of moving the device, and to easily perform the operation of moving the disk tray. It is an object of the present invention to provide a recording and / or reproducing apparatus which can perform the recording and / or reproducing.

Still another object of the present invention is to provide a recording and / or reproducing apparatus capable of reducing the thickness and size of the entire apparatus while using disk-shaped recording media having different diameters. .

[0017]

According to the present invention, a recording and / or recording method according to the present invention is provided.
Or, the playback device, in order to achieve the object as described above,
A first recess in which a large-diameter first disc-shaped recording medium is placed on one surface and a first recess in which a second disc-shaped recording medium having a smaller diameter than the first disc-shaped recording medium is placed A second tray with a smaller diameter is provided with a concentrically formed disc recess. The disc tray has a notch formed around the outer periphery including at least the center of the first and second recesses, and has a base having a width capable of entering and leaving the notch. A rotary drive mechanism for rotating the disk-shaped recording medium placed in the first or second concave portion, and recording and / or reproducing information signals on the disk-shaped recording medium rotated by the rotary drive mechanism; A recording and / or reproducing means and a feeding mechanism for feeding the recording and / or reproducing means over the inner and outer circumferences of the disk-shaped recording medium rotated by the rotation driving mechanism are provided.

When the base enters the notch of the disk tray, the disk rotation drive mechanism and the recording and / or reproducing means disposed on the base enter the notch.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an example in which the present invention is applied to a disk player using an optical disk as a recording medium.

As shown in FIG. 1, a disc player according to the present invention has a large-diameter first optical disc 1 having a diameter of 12 cm and a second optical disc having a smaller diameter than the first optical disc 1 having a diameter of 8 cm. 2 is provided with a disc tray 3 on which the disc tray 2 is selectively placed. As shown in FIGS. 1 and 2, the first concave portion 4 on which the first optical disc 1 is positioned and placed, and the second optical disc 2 are positioned on one surface side of the disc tray 3. A second concave portion 5 to be placed is formed. The second concave portion 5 on which the small-diameter second optical disc 2 is placed is formed concentrically with the first concave portion 4 such that the bottom 6 of the first concave portion 4 is depressed one step.

The first and second concave portions 4 and 5 prevent the first and second optical disks 1 and 2 from easily falling out of these concave portions 4 and 5 when the first and second optical disks 1 and 2 are placed, and the position of the mounting position is reduced. It is formed so that positioning can be performed. The first recess 4 has an inner diameter slightly larger than the outer diameter of the first optical disc 1,
The second concave portion 5 has an inner diameter slightly larger than the outer diameter of the second optical disk 2 and is equal to or slightly larger than the thickness of the second optical disk 2. It is deeply formed. The disc tray 3 in which the first and second concave portions 4 and 5 having a sufficient depth for mounting the first and second optical discs 1 and 2 are concentrically provided as shown in FIG. As shown in the first
And has a second thickness equal to or slightly deeper first and second recesses 4 and 5 of the optical disc 1 is formed with a thickness D ₁ that sufficient to form a multi-stage.

As shown in FIG. 1, the disc tray 3 includes the central portions of the first and second concave portions 4 and 5 and extends from the central portion of the disc tray 3 to the outer periphery on the back side. A cutout 7 having a substantially rectangular shape is formed. Even when the small-diameter second optical disc 2 is placed on the disc tray 3, the notch 7 is securely placed on the second recess 5, so that the notch 7 can be reliably prevented from dropping. Width W ₁
It is formed with. Specifically, the notch 7 is 4
It is formed with a width W ₁ of the 6~50mm. The tip 7a on the inner side of the notch 7 is formed in an arc shape corresponding to the outer shape of the disk table entering the notch 7.

Although not shown, the disc tray 3 is capable of loading and unloading the first and second optical discs 1 and 2 into and from the first and second recesses 4 and 5 through tray insertion / removal openings provided in the apparatus main body. And a second position, which is a playing position drawn into the apparatus main body. The disk tray 3 is provided by a tray moving operation mechanism provided in the apparatus main body, and is moved between a first position and a second position.

As shown in FIG. 1, the disc player according to the present invention is formed in a rectangular shape corresponding to the substantially rectangular notch 7 formed in the disc tray 3, and enters and leaves the notch 7. It comprises a base 11 having a width W ₂ which forms possible. On the base 11, the first or second optical disk 1, 2 placed on the disk tray 3 and moved to the reproduction position in the apparatus main body is mounted, and the first or second optical disk 1, 2 is rotated. Disk rotation drive mechanism 12 to be driven
Scanning the signal recording area of the first or second optical disk 1 or 2 mounted on the disk rotation drive device 12 and rotated by the light beam emitted from the light source, , 2 and a pickup feed mechanism 14 for moving the optical pickup device 13 radially over the inner and outer circumferences of the first or second optical disc 1, 2. Is attached.

When the base 11 enters the notch 7 of the disk tray 3 as shown in FIG. 2, the disk rotation drive mechanism 12 moves the tip 7a of the notch 7 as shown in FIG.
It is disposed on the tip side of the base 1 facing the center of the first and second recesses 4 and 5 which are the sides. The disk rotation driving device 12 includes a spindle motor 15 and a disk table 17 attached to a tip end of a spindle shaft 16 of the spindle motor 15 and rotated integrally with the spindle shaft driving shaft 16.

As shown in FIG. 2, the disk rotation drive mechanism 12 has a spindle motor 15 mounted on a motor mounting portion 19 surrounded by a position regulating wall 18 formed so as to protrude in a semicircular shape on the lower surface side of the base 11. The spindle motor 15 is attached to the base 11 by fixing the spindle motor 15 to the base 11 with a fixing screw inserted from the upper surface side of the base 11. At this time, the spindle motor 1
5 is fixed to the base 11 with its upper surface side abutted against the lower surface of the base 11 and the spindle shaft 16 protruding toward the upper surface side of the base 11.

As shown in FIG. 2, a disk table 17 is integrally attached to the tip of a spindle shaft 16 protruding from the upper surface of the base 11. At the center of the disk table 17, the first or second optical disk 1, 2
A centering portion 17a for centering the mounting position with respect to the disk table 17 is protruded. The diameter of the centering portion 17a is reduced toward the distal end side, and the first
Alternatively, the center holes 1a and 2a of the second optical discs 1 and 2 are engaged to center the placement of the first or second optical discs 1 and 2 on the disc table 17.

As described above, the disk rotation drive mechanism 12 supported by the base 11 with the spindle motor 15 positioned on the lower surface side of the base 11 and the disk table 17 positioned on the upper surface side of the base 11, When moved so as to enter the notch 7 of the tray 3, FIG.
As shown in FIG. 3, the disk table 17 enters the first and second concave portions 4 and 5 of the disk tray 3 and projects further upward. When the disk table 17 projects into the first and second concave portions 4 and 5, the first or second optical disks 1 and 2 placed in the first and second concave portions 4 and 5 are moved to the first or second optical disks. It floats from the second recesses 4 and 5 and is placed on the disk table 17.

As shown in FIG. 3, the optical pickup device 13 includes a first or a second
Block 22 incorporating a light source 22a such as a semiconductor laser for emitting a light beam applied to the optical disks 1 and 2
And the light beam emitted from the light source
And an objective lens 23 for converging and irradiating the signal recording surface of the first or second optical disk 1 or 2 placed on the optical disk 7. The objective lens 23 is supported by a two-axis actuator so as to be movable in the optical axis direction of the objective lens 23 and in a plane direction orthogonal to the optical axis direction. Objective lens 23
Irradiates the first or second optical disc 1 or 2 placed on the disc table 17 and driven to rotate integrally with the disc table 17, and is reflected from the first or second optical disc 1 or 2. The two-axis actuator is driven based on the focus error signal and the tracking error signal obtained by detecting the light beam of
The objective lens 23 is moved and displaced in the optical axis direction of the objective lens 23 and in a plane direction orthogonal to the optical axis direction.
Is driven and displaced based on the focus error signal and the tracking error signal, so that the objective lens 23
Is focused on the signal recording surface of the first or second optical disc 1 or 2, and scans a predetermined recording track formed on the first or second optical disc 1 or 2. Controlled.

In the optical block 22, the light beam emitted from the light source is guided to the objective lens 23, and the return light beam reflected from the first or second optical disk 1 or 2 and incident on the objective lens 23. And an optical element such as a beam splitter for guiding the light to a photodetector.

As shown in FIG. 1, the optical pickup device 13 has a guide shaft insertion hole 24 at one end of the optical block 22.
A pair of guide shaft support pieces 25 having holes are provided, and a guide support piece 26 engaged with a part of the base 11 is provided on the other end side of the optical block 22. As shown in FIG. 1, the optical pickup device 13 is disposed such that the objective lens 23 faces the upper surface of the base 11 and is located in an opening 27 formed in the longitudinal direction of the base 11. In this optical pickup device 13, the guide shaft insertion hole 24 is
As shown in FIG. 4, a guide screw 26 having an L-shaped cross section is inserted into a feed screw 28 attached to the upper surface of the base 11 facing the disk tray 3, and the guide support piece 26 is attached to the base 11 as shown in FIG. By engaging with one side of the formed opening 7, the first or second optical disc 1, which is placed on the disc table 17 between a position close to the disc table 17 and a position separated therefrom, parallel in FIG 2 in the radial direction are supported movably in the direction of arrow X ₁ and the arrow X ₂ direction. The feed screw 28 is supported at both ends by screw support pieces 28 a and 28 b provided on the base 11.
1 is rotatably supported. Further, as shown in FIG. 1, the optical pickup device 13 presses the engaging pin 20 a attached to the elastically displaceable support piece 20 provided on one side of the optical block 22 into the thread groove 28 a of the feed screw 28. They are connected to the feed screw 28 by joining.

The optical pickup device 13 has the optical block 22 supported by a feed screw 28 disposed on the upper surface side of the base 11, so that substantially the entire device 13 is mounted on the base 1.
1 is disposed on the upper surface side.

[0033] Then, the optical pickup apparatus 13, the feed screw 28 by being rotated by a pickup feed motor 30 is operated to move the arrow X ₁ direction and the direction of arrow X ₂ in FIG. As shown in FIGS. 3 and 4, the pickup feed motor 30 is attached to the lower surface of the base 11, and the worm gear 32 attached to the drive shaft 31.
The first connection gear 33 that meshes with the second connection gear 34 attached to one end of the feed screw 28 is connected to the feed screw 28.

As described above, the disk rotation drive mechanism 12
And base 1 to which optical pickup device 13 is attached
As shown in FIGS. 2 and 3, 1 is supported on a support substrate 36 disposed in a housing constituting the apparatus main body via a damper member 35 disposed at each corner. The damper member 35 is formed of an elastic member such as rubber, and is inserted and supported by a support shaft 37 erected on a support substrate 36. The base 11 is supported on the support substrate 36 so as to be elastically displaceable by engaging an insertion hole 38 formed in each corner with an engagement recess 35 a formed to reduce the diameter in the middle of the damper member 35. Is done. Thus, the base 11
Is supported on a support substrate 36 via a damper member 35, thereby preventing direct transmission of disturbance applied to the apparatus main body.

The base 11 supporting substrate 36 supporting the can, not shown, is movably supported in FIGS. 2 and 5 closely spaced on the disc tray 3 in the arrow Y ₁ direction and the arrow Y ₂ direction. The support substrate 36 is a first or second optical disk that is moved and operated between a first position where the disk tray 3 protrudes from the apparatus main body and a second position which is a playing position drawn into the apparatus main body. during loading or during unloading of 1,2, it is moved downward in FIG. 2 arrow Y ₂ direction of the disc tray 3. The support substrate 36 by being moved in the arrow Y ₂ direction in FIG. 2, the base 11 is also moved in arrow in FIG Y ₂ direction. At this time, the base 11
As shown in FIG. 5, the disk table 17 of the disk rotation drive mechanism 12 and the objective lens 23 of the optical pickup device 13 are located below the first and second concave portions 4 and 5 of the disk tray 3. The optical disk is moved to a position where it does not contact the first or second optical disc 1 or 2 placed in the first or second concave portion 4 or 5.

Further, when the disc tray 3 is pulled to the second position is a playback position in the apparatus main body, the supporting substrate 36 is moved in Figures 2 and 5 in the arrow Y ₁ direction close to the disk tray 3 . By supporting substrate 36 is moved in the arrow Y ₁ direction in FIG. 2 and FIG. 5, the support substrate 36
Supported base 11 also moves in FIGS. 2 and 5 in the arrow Y ₁ direction, the disc table 17 is the disc tray 3 in the disk rotation driving mechanism 13 attached to the base 11
The first or second optical discs 1 and 2 placed in the first and second recesses 4 and 5 are lifted from the first and second recesses 4 and 5 and placed on the disc table 17. And is rotatable integrally with the disk table 17.

The first or second optical disk 1 or 2 placed on the disk table 1 completes the reproduction of the optical disk 1 or 2 and the support substrate 36 moves downward to the disk tray 3 in FIG. _When the disk table 17 moves in _two directions and moves below the disk tray 3, as shown in FIG. 5, the disk table 17 comes off the disk table 17 and is placed in the first or second concave portion 4, 5, and the disk With the tray 3, it can be moved to the first position outside the apparatus main body.

The support substrate 36 is moved vertically with respect to the disk tray 3 by a moving operation mechanism (not shown), or comes into contact with or separates from the disk tray 3 by being rotatably supported at the base end side. 2 and 5
It is operated to move the middle arrow Y ₁ direction and the arrow Y ₂ direction.

As described above, the disk player according to the present invention allows the base 11 on which the disk rotation drive mechanism 12 and the optical pickup device 13 are mounted to enter into and out of the cutout 7 formed in the disk tray 3. since then formed by formed with a width W ₂ formed by the disc tray 3
The first and second optical discs 1 and 2 placed on the disc table 17 are placed on the disc table 17 and can be rotated integrally with the disc table 17 in the reproducing state shown in FIGS. 3 can be positioned on the same plane, and the first or second optical disk 1 placed in the first or second concave portion 4, 5 even if the amount of advance / retreat of the disk table 17 with respect to the disk tray 3 is reduced. , 2
Can be mounted on and dismounted from the disk table 17, the height H ₁ (see FIG. 5) from the spindle motor 15 to the tip of the disk table 17 can be reduced, and the apparatus body can be made thinner. Can be.

In particular, the spindle motor 15 is connected to the base 11
By disposing the disk table 17 on the upper surface side of the base 11 and lowering the height of the upper surface side of the base 11, the thickness of the apparatus body can be further reduced. it can.

In the above example, the disk rotation drive mechanism 1
2 and base 11 to which optical pickup device 13 is attached
Is configured to enter or leave the disc tray 3 substantially vertically from the lower surface side of the disc tray 3, but the recording and / or reproducing apparatus according to the present invention comprises
1, as shown in FIG. 6, by moving the disk tray 3 in the arrow Z ₁ direction and the arrow Z ₂ direction is a horizontal direction configured to enter and or leaving the disc tray 3, device The main body can be made thinner and more compact.

In the recording and / or reproducing apparatus shown in FIG. 6, the disk tray 3 is moved with respect to the base 11 on which the disk rotation drive mechanism 12 and the optical pickup apparatus 13 are mounted. The first and second optical disks 1 and 2 placed in the first and second concave portions 4 and 5 are mounted on and dismounted from the disk table 17 by moving in the vertical direction parallel to the vertical direction. It is composed.

In this recording and / or reproducing apparatus,
When the disc tray 3 is moved, the base 11
As shown in (1), since it is sufficient to move the disc tray 3 to a position where it does not overlap the first or second recessed portion 4 or 5, the amount of movement of the base 11 can be reduced, and the overall size of the apparatus can be reduced. be able to.

In the above example, an example was described in which the present invention was applied to a disk player for reproducing information signals recorded on the first or second optical disk 1 or 2. However, the present invention relates to an optical disk. The present invention can be widely applied to an apparatus that uses a disc-shaped recording medium such as the above and records and reproduces information signals on and from this recording medium.

[0045]

As described above, the recording and / or reproducing apparatus according to the present invention is a rotary drive for rotating the first or second disc-shaped recording medium having different diameters placed on the disc tray. A base provided with a mechanism and a recording and / or reproducing means for recording and / or reproducing an information signal on a first or second disc-shaped recording medium rotated and driven by the rotary driving mechanism is provided on a disc tray. Is formed to have a width that allows it to enter and leave the notch to be formed, so that the first or second disc-shaped recording medium placed on the disc tray is mounted by moving relative to the disc tray. Since the height of the drive mechanism can be kept low, the thickness of the entire apparatus can be reduced, and the amount of movement of the base relative to the disk tray can be reduced.
Not only is the operation of moving the base easy, but also the size of the entire apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of a disc player to which the present invention is applied.

FIG. 2 is a longitudinal sectional view showing a state in which a base on which a disk rotation drive mechanism and an optical pickup device are mounted is moved to a disk tray side to reproduce an optical disk.

FIG. 3 is a longitudinal sectional view showing a state in which a base on which a disk rotation drive mechanism and an optical pickup device are attached is moved to a disk tray side to reproduce an optical disk.

FIG. 4 is a sectional view showing a feed mechanism of the optical pickup device.

FIG. 5 is a vertical cross-sectional view showing a state where the base on which the disk rotation drive mechanism and the optical pickup device are mounted is detached from the disk tray, and the disk tray is movable.

FIG. 6 is a schematic plan view showing another example of the recording and / or reproducing apparatus according to the present invention, showing an example in which a base is moved in a horizontal direction with respect to a disc tray.

[Explanation of symbols]

1 first optical disk, 2 second optical disk, 3
Disc tray, 4 first concave portion, 5 second concave portion, 7 notch portion, 11 base, 12 disk rotation drive mechanism, 13 optical pickup device, 14 pickup feed mechanism, 15 spindle motor, 1
7 Disc table 22 Optical block, 23
Objective lens, 30 pickup feed motor.

Claims (1)

[Claims] 1. A first concave portion on which a large-diameter first disc-shaped recording medium is placed on one surface, and a second disc-shaped recording medium having a smaller diameter than the first disc-shaped recording medium are placed. A second concave portion having a diameter smaller than that of the first concave portion is formed concentrically, and a notch portion is formed over the outer periphery including at least the center of the first and second concave portions; A rotation drive mechanism having a width that allows the disk-shaped recording medium to be inserted into and removed from the notch, and that rotationally drives the disk-shaped recording medium placed in the first or second recess; Recording and / or reproducing means for recording and / or reproducing information signals on a disc-shaped recording medium to be recorded, and inner and outer peripheries of the disc-shaped recording medium which are driven to rotate the recording and / or reproducing means by the rotation drive mechanism A feed mechanism that operates the feed over It is made and a base recording and / or reproducing apparatus.