JPH09139003A - Mechanism for loading recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the power consumption and to miniaturize the constitution of the device of a recording medium loading mechanism for sucking and holding the recording medium by reducing the load at the time of unloading operation. SOLUTION: A disk cartridge(DC) 120 is loaded on a chassis 1 in such a manner that the DC 120 is inserted to a cartridge holder(CH) 54 which is arranged so as to move apart from or nearer to the chassis 1, to operate this CH 54 for movement. When a control plate 55 movable in the direction of back and forth to the chasses 1 is positioned on the front side, the CH 54 is held at the position of the height apart from the chassis 1 by the energizing force of an extension coil 73. When the control plate 55 is operated for moving to the rear side, the CH 54 is moved backward together with the control plate 55, and after a control pin 65 abuts correspondingly agains an end edge part 14, it is operated for descending to the side of chassis 1 while getting a profiling pin 64 along a cam slit 68 inside. At this time, the coil spring 73 is expanded by the elastic displacement, thereby the elastic force is stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a recording medium loading mechanism for mounting a recording medium on a recording / reproducing apparatus for recording / reproducing information signals on / from the recording medium.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a disc player device configured to record or reproduce an information signal by using a recording disc such as an optical disc or a magneto-optical disc as a recording medium.

In such a disc player device, the recording disc is positioned and held with reference to a circular positioning hole (chucking hole) provided in the central portion. That is, the disc player device has a disc table that has a positioning protrusion that is fitted into the positioning hole and that is rotated by a spindle motor.

The disk table positions and holds the recording disk by fitting the positioning protrusion into the positioning hole of the recording disk, and is rotated by the spindle motor to rotate the recording disk. Manipulate. The disc table has a magnet on the positioning protrusion. The magnet attracts the chucking plate attached to the recording disk so as to close the positioning hole, and holds the recording disk on the disk table.

In the disc player device, an optical pickup device writes or reads information signals on a recording disc held on the disc table and rotated.

The disc player device includes
It has a recording medium loading mechanism for carrying a recording disk inserted from the outside and mounting the recording disk on the disk table.

The recording medium loading mechanism is composed of a holder member for holding the recording disk and a loading motor for moving the holder member via a cam mechanism.

During the loading operation of the recording medium loading mechanism, the holder member is moved to a position where the recording disc is mounted on the disc table by the driving force of the loading motor while holding the recording disc. To be done.

During the unloading operation of the recording medium loading mechanism, the holder member holds the recording disk mounted on the disk table, and the recording disk is loaded by the driving force of the loading motor. Remove from the disc table,
The recording disk is moved to a position where it can be taken out to the outside.

[0010]

By the way, in the recording medium loading mechanism as described above, since the recording disk is attracted to the magnet of the disk table during the loading operation, the operation is completed with a small load. However, during the unloading operation, the recording disk has to be removed from the disk table against the attraction force of the magnet, so that the load on the loading motor becomes large.

Therefore, the loading motor is
The driving force must be sufficient to overcome the load applied during the unloading operation, and it is difficult to reduce the size. This impedes the reduction in size and weight of the entire recording medium loading mechanism.

Therefore, the present invention is proposed in view of the above-mentioned circumstances, and is a recording medium loading mechanism having a recording medium mounting portion for sucking and holding a recording medium,
An object of the present invention is to provide a recording medium loading mechanism in which the load generated during the unloading operation is reduced, and the size and weight of the apparatus can be reduced.

[0013]

In order to solve the above problems, a recording medium loading mechanism according to the present invention positions and adsorbs and holds a recording medium on a chassis and records an information signal on the recording medium. A recording medium mounting portion for reproducing, a recording medium holder disposed on the chassis so as to be movable in a contacting / separating direction with respect to the chassis and holding the recording medium, and mounting the recording medium on the recording medium mounting portion. A control member that is disposed so as to be movable with respect to the chassis, and that is operated to move the recording medium holder in the contacting / separating direction with respect to the chassis via a cam mechanism, and an elastic member attached to the control member. A displacement member, and the control member elastically changes when the recording medium holder is moved in a direction in which the recording medium holder is moved to the chassis side. The member has been made and to be moved while elastically displaced.

Further, according to the present invention, in the recording medium loading mechanism, when the control member is operated to move in a direction in which the recording medium holder is moved away from the chassis, the elastic displacement occurs. It is decided to move while being assisted by the elastic restoring force of the member.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

In this example, the recording medium loading mechanism according to the present invention is configured as a loading mechanism of a disc player device for recording and reproducing an information signal by using a recording disc housed in a cartridge as a recording medium. .

The recording disk used in this disk player device is a recording disk for recording information signals, such as a so-called optical disk or magneto-optical disk, and is rotatably housed in a thin casing cartridge to form a disk cartridge. It is what

The magneto-optical disk has a diameter of 64, for example.
A signal recording layer made of a magnetic material is formed on a disk substrate made of a transparent synthetic resin material such as polycarbonate of about mm.

This signal recording layer is locally heated to a temperature higher than the so-called Curie temperature by means such as irradiation of a focused laser beam, and an external magnetic field is applied to this heated portion, whereby the information signal Written. The information signal thus written irradiates the signal recording layer with a linearly polarized light beam such as a laser beam, and detects the rotation of the reflected light beam of this light beam in the signal recording layer due to the so-called Kerr effect. Thereby, it can be read.

Further, the optical disc is constructed by depositing a reflective layer made of a metal material such as aluminum on a disc substrate similar to the disc substrate of the magneto-optical disc. On the disc substrate of this optical disc, fine pit rows corresponding to the information signals are formed by means such as injection molding.

The information signal written on the optical disc irradiates the pit train with a coherent light beam such as a laser beam, and changes the amount of the reflected beam of the beam due to diffusion or interference in the signal recording layer. It can be read by detecting.

The magneto-optical disk and the optical disk are the cartridge 1 as shown in FIGS.
The disk cartridges are rotatably housed in 05 and 116 to form a disk cartridge.

The cartridge 105, which constitutes the recording / reproducing disk cartridge 120 by accommodating the magneto-optical disk, has a thin casing having a rectangular main surface portion whose one side substantially corresponds to the diameter of the magneto-optical disk. It is constructed like a body. As shown in FIG. 19, this cartridge 105 has a magnetic head opening 123 for exposing a part of the signal recording surface of the magneto-optical disk to the outside on the main surface on the upper surface side. In addition, this cartridge 105
As shown in FIG. 20, has an optical pickup opening 122 at a position facing the magnetic head opening 123 on the main surface on the lower surface side, and a chuck is provided at a substantially central portion of the main surface section on the lower surface side. It has a king opening 113. This recording / playback disc cartridge 120 is different from the disc player device in the arrow G in FIGS.
As shown by, it is inserted and attached in the forward direction.

The above-described recording / reproducing disc cartridge 1
In the cartridge 105 of No. 20, the magnetic head opening 123 and the optical pickup opening 122.
Can be opened and closed by the shutter member 106. The shutter member 106 has these openings 123,
The shutter plate portions corresponding to 122 are opposed to each other in parallel to each other, and the connecting portions that connect the one end sides of the shutter plate portions to each other, and are made of a synthetic resin material or a metal material.
It is configured integrally. This shutter member 106 is
The connecting portion is slidably supported by a supporting groove portion 107 formed on one side of the cartridge 105. That is, the shutter member 106 slides backward along one side of the cartridge 105 to open the openings 123 and 122, and slides forward from the rear side to return to the initial position. Then, the shutter plates close the openings 123, 122.

The cartridge 116, which constitutes the read-only disc cartridge 121 by accommodating the optical disc, has a thin casing shape having a rectangular main surface portion whose one side substantially corresponds to the diameter of the optical disc. It is configured. As shown in FIG. 21, this cartridge 116 does not have an opening in the main surface portion on the upper surface side. As shown in FIG. 22, the cartridge 116 has an optical pickup opening 122 on the lower surface side main surface portion, and a chucking opening 113 at the substantially central portion of the lower surface side main surface portion. There is. This reproduction-only disc cartridge 121 is different from the disc player device shown in FIG.
1 and as indicated by an arrow G in FIG. 22, it is inserted and attached in the forward direction.

The reproduction-only disc cartridge 121
In the cartridge 116, the optical pickup opening 122 can be opened and closed by a shutter member 117. The shutter member 117 has a shutter plate portion corresponding to the optical pickup opening 122 and a support portion provided on one end side of the shutter plate portion, and is integrally made of a synthetic resin material or a metal material. Is configured. The shutter member 117 has the support portion slidably supported by a support groove portion 107 formed on one side of the cartridge 116. That is,
The shutter member 117 slides rearward along one side of the cartridge 116 to open the optical pickup opening 122, and slides forward from the rear side to return to the initial position. The shutter plate portion closes the optical pickup opening 122.

The shutter members 106 and 117 are provided with
A shutter closing hole 108 is opened toward the lateral side at a substantially central position of the connecting portion or the supporting portion. The shutter closing hole 108 is for engaging a member for closing the shutter members 106 and 117 in the disc player device.

A circular chucking hole 104 is formed at the center of the magneto-optical disc and the optical disc. The chucking hole 104 is closed by a chucking plate 102 from the upper surface side. This chucking plate 102 is made of iron or stainless steel,
The chucking hole 10 is made of a magnetic metal material.
4 is formed in a disk shape having a diameter substantially corresponding to 4. These chucking holes 104 and chucking plate 10
2 is exposed to the outside of the cartridges 105 and 116 through the chucking opening 113.

Then, each of the cartridges 105 and 11
A pair of front side and rear side positioning holes 109, 110 are formed in the lower main surface portion of 6. The front-side positioning hole 109 has the opening 122 for the optical pickup.
Is located in the vicinity of the edge of the main surface portion on the front side, and is formed in an oval shape with the major axis direction being the front-rear direction. Also,
The rear side positioning hole 110 is located in the vicinity of an edge of the rear side main surface of the optical pickup opening 122, and is formed in a circular shape.

Further, each of the cartridges 105, 116 described above
A plurality of identification holes 124 are formed in the vicinity of the edge on the other side of the lower main surface portion rear side. These identification holes 124
Is for identifying the type and state of the disks housed in the cartridges 105 and 116, for example, whether or not information signals can be recorded. In the cartridge 105 of the recording / playback disk cartridge 120, a save notch 114 is provided on the rear side surface portion corresponding to the identification hole 124. This save notch 11
4 is moved and operated to identify the hole 124 for identification.
One of the two is moved back and forth, the depth of the identification hole 124 is changed, and the identification state of whether or not the information signal can be recorded is switched. Further, the engaged concave portion 112 is formed at the edge portion on the other side of the lower main surface portion front side of each of the cartridges 105 and 116.
Are formed.

The recording / reproducing disc cartridge 1
In the No. 20 cartridge 105, the magneto-optical disc identifying recess 111 is formed at the front side edge of the lower main surface. In addition, the reproduction-only disc cartridge 12
In the cartridge 116 of No. 1, the optical disk disc identification concave portion 118 is formed at the front side edge portion of the lower main surface portion. The magneto-optical disc identifying concave portion 111 and the optical disc identifying concave portion 118 have different depths from the lower main surface portion. Due to the difference in depth, whether the stored disc is the magneto-optical disc or the optical disc. It is designed to be able to identify.

As shown in FIGS. 1 and 2, this disc player device has a chassis 1 having a size substantially corresponding to the size of each of the disc cartridges 120 and 121.

The chassis 1 is so-called floating-supported with respect to a base frame 32 fixedly arranged in an outer casing (not shown) of the disc player device. That is, in the four corners of the chassis 1,
Each of the support pieces 85 is projected. These support pieces 8
A damper fitting portion 87 is provided on each of the parts 5.
The dampers 31 are fitted in the damper fitting portions 87, respectively. These dampers 31 are made of a material having a shock absorbing property such as butyl rubber and are formed into a substantially cylindrical shape. The chassis 1 has the dampers 31.
The support screws inserted corresponding to the above are the above-mentioned base frame 3
By being screwed in corresponding to the screw holes 33 provided in the base frame 32, the base frame 32 is inserted through the dampers 31.
Supported by

On the chassis 1, there is provided a disc cartridge mounting portion which serves as a recording medium mounting portion for positioning and adsorbing and holding the recording disc on the chassis 1 and recording and reproducing information signals on the recording disc. It is provided.

That is, the disk cartridges 120 and 121 are positioned and mounted on the chassis 1. The chassis 1 has a pair of front and rear positioning pins 3 on the upper surface thereof. By fitting the positioning pins 3 in correspondence with the positioning holes 109 and 110, the disk cartridges 120 and 121 can be fitted.
Position.

Each of the disc cartridges 120, 12
1 is mounted on the chassis 1 by inserting the disk cartridges 120 and 121 into a cartridge holder 54, which will be described later, disposed on the upper side of the chassis 1 so as to be able to come into contact with and separate from the chassis 1. 54
Is performed by moving the.

That is, the disc cartridges 120, 121 are inserted in the front direction into the cartridge holder 54 separated from the chassis 1, and the disc cartridges 120, 121 are inserted in the cartridge holder 54.
121 is held, and this cartridge holder 5
4 by bringing the disk cartridge 1 close to the chassis 1 by a loading mechanism, as will be described later.
20, 121 are mounted on the chassis 1.

A disk table 2 is arranged at a substantially central portion on the chassis 1.

The disc table 2 is formed in a disk shape, and has a center portion attached to the drive shaft of the spindle motor attached to the chassis 1, that is, the spindle shaft. When the spindle shaft is rotationally driven, the disc table 2 is rotated together with the spindle shaft.

The disc table 2 has a positioning protrusion at the center of the upper surface thereof, which fits into the positioning hole 104 of the recording disc. The positioning protrusion is formed in a substantially truncated cone shape so that it can be smoothly fitted into the positioning hole 104.

The positioning protrusion has an elastic displacement portion on the outer peripheral edge. The elastic displacement portion is disposed so as to project toward the outer side of the positioning projection portion, and is elastically displaced so that the elastic displacement portion is projected and retracted with respect to the outer peripheral surface of the positioning projection portion. That is, in this elastic displacement portion, the positioning protrusion is the positioning hole 104.
Then, the inner peripheral portion of the positioning hole 104 is elastically pressed to hold the recording disk on the disk table 2.

An annular magnet is arranged on the upper surface of the positioning protrusion. The magnet attracts the chucking plate 102 of the recording disc held on the disc table 2, adsorbs and holds the recording disc on the disc table 2, and removes the recording disc from the disc table 2 from the disc table 2. Prevent falling.

On the peripheral side of the positioning protrusion, the peripheral side portion of the disc table 2 is projected in a flange shape, and the peripheral portion of the positioning hole 104 of the recording disc is placed. A disk mounting portion is formed.

The disc cartridges 120 and 121
When the disk is mounted on the chassis 1, the recording disks of the disk cartridges 120 and 121 are fitted into the positioning projections of the disk table 2 in the positioning holes 104 through the chucking openings 113. Also, the peripheral portion of the positioning hole 104 is positioned and held on the disc table 2 in a state where the peripheral portion is placed on the disc mounting portion. At this time, the magnet attracts the chucking plate 102 toward the disc table 2 and holds the recording disc on the disc table 2.

In the disc player device, the optical pickup device 4 is mounted on the chassis 1.
Are arranged. The optical pickup device 4 has an optical block section, and in the optical block section, a light source such as a laser diode, various optical devices for guiding a light beam emitted by the light source, and an objective lens 5 for collecting and emitting the light beam. , And a photodetector for detecting the reflected light flux of the light flux emitted from the objective lens 5.

The optical pickup device 4 writes or reads an information signal on the recording disk by irradiating the signal recording surface of the recording disk with a light beam emitted from the objective lens 5.

The optical pickup device 4 is
As shown by an arrow J in FIG. 1, with respect to the chassis 1,
The disk table 2 is arranged so as to be movable in the contacting and separating directions. The optical pickup device 4 is arranged along the guide shaft 6 attached to the chassis 1 as follows.
The drive force of the pickup feed motor arranged on the chassis 1 is used for the feed operation via the drive force transmission gear.

When the optical pickup device 4 is fed to the chassis 1, it is held by the disc table 2 through the opening 122 for the optical pickup, and is rotated. Information signals are written or read on the entire surface of the recording area.

Further, the optical pickup device 4 includes
A magnetic head device 7 facing the objective lens 5 is attached via a head arm 8. When the disk cartridges 120 and 121 are mounted on the chassis 1, the recording disk is located between the objective lens 5 and the magnetic head device 7. The magnetic head device 7 faces the recording disk through the magnetic head opening 123. That is, the magnetic head device 7 can apply a magnetic field having a predetermined intensity or modulated according to an information signal to a region of the recording disk facing the objective lens 5. .

The head arm 8 is divided, via a rotational displacement portion 10, into a tip side portion to which the magnetic head device 7 is attached and a base end side portion to which the optical pickup device 4 is attached. . The rotary displacement section 10 is configured to include a rotary support shaft and a torsion coil spring wound around the rotary support shaft.

In the magnetic head device 7, as the tip side portion of the head arm 8 is rotated around the rotation support shaft of the rotation displacement portion 10, as shown by an arrow H in FIG. The objective lens 5 can be brought into and out of contact with the objective lens 5, and is urged to rotate by a torsion coil spring of the rotational displacement portion 10 in a descending direction which is a direction in which the objective lens 5 is approached.

A head elevating operation plate 9 is provided on the chassis 1 below the tip side portion of the head arm 8. , This head lifting operation plate 9
Is rotatably supported with respect to the chassis 1 via a support shaft 11 at a rear edge side portion thereof.

The head elevating and lowering operation plate 9 comes into contact with the tip end side portion of the head arm 8 by being pivotally operated in the direction in which the upper side, that is, the front edge side is separated from the chassis 1, and the head arm 8 is abutted. The tip side portion of 8 is rotated upward. Further, the head lifting operation plate 9
When the lower side, that is, the front edge side is rotated in the direction of approaching the chassis 1, the head arm 8 is separated from the tip side portion, and the tip side portion of the head arm 8 rotates downward. It is possible.

A pair of left and right side wall portions are provided on the chassis 1 on both sides of the chassis 1. As shown in FIGS. 1 to 4, a cartridge holder 54 serving as a recording medium holder is disposed between the side wall portions.

The cartridge holder 54 is formed in a housing shape in which substantially the entire lower surface and the front side are opened. The disc cartridges 120 and 121 are inserted into the cartridge holder 54 from the front side. The cartridge holder 54 has a pair of left and right support flanges 66, 6 for supporting both sides of the lower surface of the disk cartridge 120, 121 on both sides of the lower surface.
6.

When the disc cartridges 120 and 121 are inserted into the cartridge holder 54 from the front side, the disc cartridges 120 and 121 are inserted.
Is sandwiched and held between the top plate portion and the support flange portions 66, 66.

At the rear side portion of the cartridge holder 54, as shown in FIG.
Positioning claws 91 and 93 are provided which contact the front end portions of the disks 20 and 121 to position the disk cartridges 120 and 121 in the front-rear direction with respect to the cartridge holder 54.

The disk cartridge 120,
When the cartridge 121 is inserted into the cartridge holder 54, the shutter members 106 and 117 are opened. That is, as shown in FIGS. 1, 2 and 6, the cartridge holder 54 is provided with a shutter closing spring 63 and a shutter opening piece 95 located on the front side of the side plate portion on one side. ing.

Further, the shutter opening piece 95 is provided so as to project toward the inner side of the cartridge holder 54. As shown by an arrow G in FIG. 7, the shutter opening piece 95 is set in FIG. 7 when the disc cartridges 120 and 121 are inserted into the cartridge holder 54.
As shown in FIG. 3, the cartridge 105, 116 enters the support groove portion 107 from the front end side and abuts on the front end portions of the shutter members 106, 117 to prevent the shutter members 106, 117 from moving. In this state, the disk cartridges 120 and 121 are further inserted into the cartridge holder 54, so that the shutter members 106 and 117 are opened as shown in FIG.

The shutter closing spring 63 is arranged such that the front end portion thereof projects toward the front side of the cartridge holder 54. The shutter lid spring 63 is bent and formed in a dogleg shape so that the tip end side portion thereof bulges toward the inner side of the cartridge holder 54. In the shutter closing spring 63, as shown in FIG. 7, the disk cartridges 120 and 121 are inserted into the cartridge holder 54 and the shutter opening piece 95 abuts on the front ends of the shutter members 106 and 117. At this time, the tip side portion is fitted into the shutter closing hole 108.

When the disc cartridges 120, 121 are pulled out to the front side of the cartridge holder 54, the shutter closing lid spring 63 closes the shutter members 106, 117 and then closes the leading end side portion of the shutters. It is pulled out from the lid hole 108.

Further, the cartridge holder 54 has
A cartridge insertion detection lever 56 is rotatably attached. As shown in FIGS. 1 and 6, the cartridge insertion detection lever 56 is formed in a substantially fan-shaped flat plate shape, and a portion corresponding to the essential part of the fan is formed in the cartridge holder 5 described above.
As shown by arrows E and F in FIG. 1, it is rotatably supported near the edge on the other side of the top plate portion of No. 4 via a support shaft 57. This cartridge insertion detection lever 56
Has a protruding piece portion protruding toward the other side of the cartridge holder 54. On the tip side of this protrusion,
A cartridge holding piece 58 is provided so as to project toward the cartridge holder 54. Further, the cartridge insertion detection lever 56 is positioned substantially at the center of the cartridge holder 54, and the cartridge insertion detection pin 62 is inserted.
have.

The cartridge insertion detecting lever 56 is
In the initial state, as shown in FIG. 6, the projecting piece portion is projected outward from the other side edge portion of the cartridge holder 54. At this time, the cartridge insertion detection lever 56 prevents the cartridge holder 54 from moving in the direction of the chassis 1 by bringing the trailing edge of the protruding piece into contact with the edge 15 described later. ing.

Further, the cartridge insertion detection lever 5
6, the cartridge insertion detection pin 62 is inserted into the cartridge holder 54 through an arcuate slit 88 formed in the top plate portion of the cartridge holder 54 with the support shaft 57 as the center of curvature. In this initial state, the cartridge insertion detection pin 62 is located in front of the support shaft 57.

The cartridge insertion detecting lever 56 is
A spring locking piece 61 provided on the cartridge insertion detecting lever 56, and a spring locking piece 60 provided on the top plate portion of the cartridge holder 54 in front of the cartridge insertion detecting lever 56. The cartridge insertion detecting pin 62 is positioned at the initial position in a state in which the cartridge insertion detecting pin 62 is rotationally biased in a direction to move the cartridge insertion detecting pin 62 to the front side by a tension coil spring 59 stretched between the two.

When the disc cartridges 120 and 121 are inserted into the cartridge holder 54, as shown in FIG.
The front end of 21 abuts on the cartridge insertion detection pin 62.

Then, the disc cartridge 12
When the shutter members 106 and 117 are opened by inserting 0 and 121 into the cartridge holder 54, the cartridge insertion detecting lever 56 operates as follows.
As shown by an arrow F in FIG. 8, the cartridge insertion detection pin 62 is attached to the disk cartridge 120, 12
By being pressed by 1 and moved to the rear side, it is rotated against the biasing force of the tension coil spring 59. At this time, the cartridge insertion detection lever 56
The projecting piece of (1) is retracted onto the cartridge holder 54 so as not to project outward from the other side edge of the cartridge holder 54.

At this time, the cartridge holding piece 58
Are inserted into the cartridge holder 54 and are fitted into and engaged with the engaged recesses 112 of the cartridges 105 and 116. The disk cartridges 120 and 121
The cartridge holding piece 5 in the engaged recess 112.
By engaging and engaging 8 with each other, movement with respect to the cartridge holder 54 is prevented.

The cartridge holder 54 is movably supported between the side wall portions of the chassis 1 in the contacting and separating directions with respect to the chassis 1, and holds the disk cartridges 120 and 121 while the chassis 1 is held.
The disk cartridges 120 and 121 are mounted on the disk cartridge mounting portion by being moved toward the side.

That is, on both side surfaces of the cartridge holder 54, a pair of left and right regulating pins 6 are provided in the lateral direction.
5, 65 are projected. These control pins 65, 65
Are projected so as to reach the outside of the chassis 1 with respect to both side wall portions of the chassis 1. Then, as shown in FIGS. 1 and 13, both side wall portions of the chassis 1 have a defective portion as a range in which the restriction pins 65, 65 can exist. On the rear side of these defects,
That is, the edge portion 1 orthogonal to the main surface portion of the chassis 1
4 and 15 are formed. Therefore, the cartridge holder 54 is movable with respect to the chassis 1 in a state where the restriction pins 65, 65 are located in front of the edge portions 14, 15.

The cartridge holder 54 is
With the regulation pins 65, 65 in contact with the respective end edge portions 14, 15, the regulation pins 65, 65 are moved to the chassis 1 side along the respective end edge portions 14, 15. By holding the disk cartridge 1
20 and 121 are mounted on the disk cartridge mounting portion.

When the cartridge insertion detecting lever 56 of the cartridge holder 54 is in the initial state, as shown in FIGS. 6 and 7, the protruding portion of the cartridge insertion detecting lever 56 has the end portion 15 The front side of the chassis 1 is projected to the side of the chassis 1.

On the chassis 1, there is provided a control plate 55 which is located between the side wall portions and serves as a control member which is movable in the front-rear direction with respect to the chassis 1.

The control plate 55 is formed in a substantially flat plate shape, and has cam pieces that hang downward from the front and rear portions of the left and right side edges. Each of these cam pieces has a cam slit 68 that constitutes a cam mechanism.
Is provided.

Guide pins 70, 70, 71, 71 are provided on both sides of the lower end of each cam piece so as to extend toward both sides. These guide pins 70, 70, 71, 71
Are inserted into and engaged with the guide grooves 12, 12, 13, 13 formed in both side wall portions of the chassis 1 in the front-rear direction.

That is, the regulating plate 55 connects the guide pins 70, 70, 71, 71 to the guide grooves 12,
Along the lines 12, 13, 13 are supported movably in the front-rear direction with respect to the chassis 1.

The cartridge holder 54 is located between the cam pieces on both sides of the control plate 55. And
The cartridge holder 54 is provided with cam slits 68, 68, 6 of the cam pieces at the front and rear positions on both side surfaces.
It has copying pins 64, 64, 64, 64 constituting the above-mentioned cam mechanism which are inserted and engaged in correspondence with 8 and 68. These copying pins 64, 64, 64, 64 are provided so as to project toward both sides of the cartridge holder 54.

In the cartridge holder 54, the restriction pins 65, 65 are protruded to the side of the cam pieces through the space between the front and rear cam pieces of the control plate 55.

The cam slits 68, 68, 68, 6 described above
The front side 8 is formed as a lower side, that is, the chassis 1 side, and the rear side is formed as an upper side, that is, an inclined portion that is separated from the chassis 1.

A tension coil spring 73 serving as an elastic displacement member is stretched between the cartridge holder 54 and the control plate 55. The tension coil spring 73 is locked at its rear end side to a spring locking piece 72 provided on the control plate 55 and at its front end side to a spring locking piece 74 provided on the cartridge holder 54. .
That is, the tension coil spring 73 biases the cartridge holder 54 toward the rear side with respect to the control plate 55.

The control plate 55 is moved with respect to the chassis 1 so that the cam slits 68, 68, 68, 68 and the copying pins 64,
64, 64, 64 via the cartridge holder 5
4 is moved in the contacting / separating direction with respect to the chassis 1.

That is, when the control plate 55 is located on the front side of the chassis 1, the cartridge holder 54 is moved by the biasing force of the tension coil spring 73, as shown in FIG. , 6
4, 64, 64 to the cam slits 68, 68, 6
The chassis 1 is located at the rear end portion of the chassis 8 and 68.
It is held at a height position more distant from it. In addition, at this time, the restriction pins 65, 65 have the end edge portions 14,
It is located in front of 15.

When the control plate 55 is moved rearward with respect to the chassis 1 as shown by an arrow N in FIGS. 14 and 15, as shown in FIGS. The respective regulation pins 65, 65 have the respective end edge portions 14, 1 described above.
The cartridge holder 54 is moved rearward together with the control plate 55 while the cartridge holder 54 is located on the front side of the cartridge 5. During this time, the positional relationship between the cartridge holder 54 and the control plate 55 does not change.

Then, as shown in FIG. 15, after the respective regulation pins 65, 65 abut against the respective edge portions 14, 15, correspondingly, further, as indicated by an arrow N in FIG.
When the control plate 55 is moved to the rear side, the cartridge holder 54 is provided with the restriction pins 65, 65.
Cannot move to the rear side of the position in which the edge portions 14 and 15 are brought into contact with each other. Therefore, at this time, the cartridge holder 54 causes the copying pins 64, 64, 64, 64 to follow the cam slits 68, 68, 68, 68 as shown by the arrow D in FIG. Further, the control pins 65, 65 are moved down to the chassis 1 side along the respective end edge portions 14, 15.

At this time, the above-mentioned copying pins 64, 64, 6
4, 64 are the cam slits 68, 68, 68, 6 described above.
Move to the front part of 8. Then, at this time, the tension coil spring 73 causes the cartridge holder 54 to
Is lowered to the chassis 1 side and the control plate 55 is moved to the rear side, so that the control plate 55 is elastically displaced and stretched to store an elastic force.

In the state shown in FIG. 16, the cartridge holder 54 mounts the held disk cartridges 120 and 121 to the disk cartridge mounting portion on the chassis 1.

That is, when the control plate 55 is operated to move the cartridge holder 54 to the chassis 1, that is, to the rear side, the control plate 55 moves while elastically displacing the tension coil spring 73. Will be done.

The control plate 55 has locked pieces at the front and rear positions of both side edges. As shown in FIGS. 6 to 8, when the control plate 55 is at the front position, that is, the initial position, these locked pieces project upward from the four corners of the base frame 32. Locking piece 3
4, 34, 34, 34 abutting on the base frame 32
Thus, the control plate 55 is locked and fixed.

At this time, the locking pieces 34, 34 are fitted in the locked grooves 75, 75 provided in the locked piece portion, and the control plate 55 is fixed by the base frame 32. Make sure. At this time, the control plate 5
5 also regulates movement of the chassis 1 with respect to the base frame 32.

As shown in FIG. 9 to FIG. 12, each of the locked pieces has the locking pieces 34, 34, 3 when the control plate 55 is located rearward of the initial position.
4 and 34, the control plate 55 is released from the base frame 32. At this time, the control plate 55 controls the chassis 1 so that the dampers 31, 31, 3,
It is possible to move the base frame 32 while deforming the parts 1 and 31.

At the rear side position of the lower surface of the chassis 1, as shown in FIGS. 1 and 2, the control plate 55 is provided.
A loading motor 16 for moving and operating is mounted. The loading motor 16 is driven by being controlled by a control circuit (not shown). The loading motor 16 has a drive gear 17 attached to a drive shaft projected to the upper surface side of the chassis 1 through a through hole provided in the chassis 1.

An outer peripheral gear portion 22 of a first transmission gear 23 rotatably supported on the chassis 1 via a gear support shaft 18 meshes with the drive gear 17. This first
The transmission gear 23 has a small-diameter gear portion 21 having a smaller diameter than the outer peripheral gear portion 22 coaxially with the outer peripheral gear portion 22.

The small diameter gear portion 21 of the first transmission gear 23.
An outer peripheral gear portion 25 of a second transmission gear 26 rotatably supported on the chassis 1 via a gear support shaft 19 is meshed therewith. The second transmission gear 26 has a small-diameter gear portion 24 coaxial with the outer peripheral gear portion 25 and having a smaller diameter than the outer peripheral gear portion 25.

The small diameter gear portion 24 of the second transmission gear 26.
An outer peripheral gear portion 27 of a third transmission gear 28 rotatably supported on the chassis 1 via a gear support shaft 20 is meshed therewith. The third transmission gear 28 has an operation pin 29 that engages with the control plate 55 projecting upward from a main surface portion on the upper surface side, and a rec position detection switch described later on the main surface portion on the lower surface side. A switch operation piece 30 for operating 52 and the ejection completion detection switch 53 is provided so as to protrude downward.

Operation pin 29 of the third transmission gear 28
As shown in FIGS. 1 and 6, is located on the front side of the engagement piece portion 79 that is hung from the rear edge of the control plate 55 toward the chassis 1.

An engaging member 78 is attached to the lower surface of the control plate 55 so as to cooperate with the engaging piece 79 to sandwich the operation pin 29 from the front and rear. The engaging member 78 is rotatably supported at one end side with respect to the control plate 55 through a support shaft 77 that is planted in the control plate 55. By rotating the engaging member 78 around the support shaft 77, the other end portion can be moved in the front-rear direction. Also, this engaging member 78
Is urged to rotate in a direction in which the other end side portion is moved to the rear side, that is, the engagement piece portion 79 side by a torsion coil spring 92 provided by winding a coil portion around the support shaft 77. Has been done.

The engaging member 78 is movable in the front-rear direction and cooperates with the engaging piece portion 79 at the other end portion thereof which is urged to move rearward, and cooperates with the operating pin 29. Is sandwiched between.

Therefore, as shown in FIG. 9, the engagement member 78 is completely inserted into the cartridge holder 54 from the front side of the disc cartridges 120 and 121, and the disc cartridges 120 and 121 are inserted. The cartridge holder 54 is pressed rearward,
When the control plate 55 is pressed rearward through the cartridge holder 54, the pressing force rotates the control plate 55 against the biasing force of the torsion coil spring 92, as shown in FIG. As indicated by an arrow M in FIG.
It is possible to move a little distance to the rear side of.

At this time, the other end side portion of the engaging member 78 is in a state of being separated from the engaging piece portion 79 toward the front side. Further, at this time, the operation pin 29 is also separated from the engagement piece portion 79 toward the front side together with the other end side portion of the engagement member 78.

The control plate 55 is moved in the front-rear direction by the driving force of the loading motor 16 via the operation pin 29. That is, the control plate 55
As shown in FIG. 6, from the state where the operation pin 29 is located on the front end edge side of the third transmission gear 28, the third transmission gear 28 extends 180 ° counterclockwise in FIG. When it is rotated by the driving force of the loading motor 16, as shown in FIG. 12, the operation pin 29 comes to a state of being located on the rear end edge side of the third transmission gear 28, so that the front side position It is moved to the rear position. On the contrary, in the control plate 55, as shown in FIG. 12, when the operation pin 29 is located on the rear end edge side of the third transmission gear 28, the third transmission gear 28 is moved to the position shown in FIG. When rotated by 180 degrees in the clockwise direction by the driving force of the loading motor 16, as shown in FIG. 6, the operation pin 29 is in a state of being positioned on the front end edge side of the third transmission gear 28. Therefore, it is moved from the rear position to the front position.

A switch board 47 is attached to the lower surface of the chassis 1. On the switch board 47, a plurality of pressing switches connected to the control circuit are mounted. These multiple push switches
A loading start switch 50, a play position detection switch 86, a rec position detection switch 52, an eject completion detection switch 53, an optical pickup position detection switch 51, a disc cartridge mounting detection switch 49, and a disc cartridge type detection switch 48.

Optical pickup position detection switch 5
1 is arranged at a position facing the optical pickup device 4, and the optical pickup device 4 is closest to the disc table 2, that is, the innermost circumference of the recording disc held on the disc table 2. When the optical pickup device 4 is located at a position facing the section, the optical pickup device 4 presses it.

That is, the optical pickup position detection switch 51 detects that the optical pickup device 4 is located at a position facing the innermost peripheral portion of the recording disk held on the disk table 2.

The disc cartridge mounting detection switch 49 faces the upper surface side of the chassis 1 through a through hole provided in the chassis 1, and when the disc cartridges 120 and 121 are mounted on the chassis 1. The bottom surface of the disk cartridges 120 and 121 is pressed.

That is, the disc cartridge mounting detection switch 49 detects that the disc cartridges 120 and 121 are mounted on the chassis 1.

The disc cartridge type detection switch 48 faces the upper surface side of the chassis 1 through a through hole provided in the chassis 1, and when the disc cartridges 120 and 121 are mounted on the chassis 1. The disk cartridges 120 and 121 face the identification holes 124. Therefore, the disc cartridge type detection switch 48 is provided with the identification hole 12
When 4 is shallow, the pressing operation is performed, and when the identification hole 124 is deep, the pressing operation is not performed.

That is, the disc cartridge type detection switch 48 detects the depth of the identification hole 124 to detect the type and state of the disc cartridges 120 and 121 mounted on the chassis 1, for example, the information signal. Whether or not recording is possible is detected.

As shown in FIG. 6, the loading start switch 50 is initialized by the first switch pressing piece 89 provided so as to hang downward from the rear side portion of the control plate 55. When it is in the front position, which is the position, the pressing operation is performed.

That is, the loading start switch 50 is pressed so that the control plate 55 is
Detects that the control plate 55 is at the initial position and that the control plate 55 has moved rearward from the initial position because the pressing operation has been released.

The play position detecting switch 86 is shown in FIG.
As shown in FIG. 1, by the second switch pressing piece 67 provided so as to hang downward from the front side portion of the control plate 55, the control plate 55 is moved to the rear side position which is the play (reproduction operation) position. When moved, it is pressed.

That is, this play position detection switch 8
6 detects that the position of the control plate 55 is the play position by the pressing operation, and that the position of the control plate 55 is not the play position by releasing the pressing operation. To detect.

The REC position detecting switch 52 is shown in FIG.
As shown in FIG. 2, the control plate 55 is moved to a rec (recording operation) position position further rearward than the play position by a switch operation piece 30 that is provided so as to hang down from the third transmission gear 28. When moved, it is pressed.

That is, this REC position detection switch 5
2 detects that the position of the control plate 55 is the REC position by the pressing operation, and that the position of the control plate 55 is not the REC position by the pressing operation being released. To detect.

The eject completion detection switch 53 is
As shown in FIG. 6, when the control plate 55 is moved to the initial position by the switch operating piece 30 of the third transmission gear 28, it is pressed.

That is, the eject completion detecting switch 53 is pressed to operate the control plate 5
It is detected that the position of No. 5 has returned to the initial position and that the position of the control plate 55 is not the initial position because the pressing operation is released.

In the magnetic head device 7, the head raising / lowering operation plate 9 is moved up and down in conjunction with the movement of the control plate 55 in the front-rear direction, whereby the objective lens 5 is moved.
It is moved up and down so as to move toward and away from.

That is, the head elevating operation plate 9 has its side edge portion placed on the head operation cam portion 80 provided on the control plate 55. This head lifting operation plate 9
While the control plate 55 reaches the play position from the initial position, as shown in FIGS. 13 to 16, the head operation cam portion 80 keeps the front edge side in the upper position. Therefore, the magnetic head device 7 is held at an upper position separated from the objective lens 5.

When the control plate 55 reaches the REC position, the head raising / lowering operation plate 9 is placed on the head operation cam portion 80 as shown in FIG. It becomes a descending portion 81 provided on the front end side of 80, and is rotated so that the front edge side is the lower side position, and the magnetic head device 7 is at the lower side position approaching the objective lens 5.

A front lid 36 is supported at a position on the front side of the base frame 32 so as to be rotatable around a support shaft 35 attached to the upper edge side. That is, this front lid 3
6, the lower edge side is supported so as to be movable in the front-rear direction, and as shown by an arrow K in FIG. 1, by moving the lower edge side to the rear side, the front portion of the base frame 32 is opened, The disk cartridges 120 and 121
Is allowed to pass. That is, the disc cartridges 120 and 121 pass below the front lid 36 whose lower end side is moved rearward.

The front lid 36 is the base frame 32.
The lid opening / closing lever 39, which is rotatably attached to the side face of the, is interlocked with the pivoting operation of the lid opening / closing lever 39. That is, the lid opening / closing lever 39 is rotatable via a support shaft that is inserted into a support hole 40 provided on the rear end side and is supported by a shaft support hole 41 provided on a side surface portion of the base frame 32. Supported by. The lid opening / closing lever 39 is movable on the front end side in the vertical direction. On the front end side of the lid opening / closing lever 39, a linking piece portion 43 having a linking slit 44 formed therein is provided. The front slit 3 is provided in the link slit 44.
The linking pin 37, which is provided so as to project to the side from the lower edge side of 6, is engaged.

Therefore, when the lid opening / closing lever 39 is rotated in the direction in which the front end side is the upper side, the front lid 36 is operated to open the lid, and the lid opening / closing lever 39 sets the front end side to the lower side. When it is rotated in the direction, the lid is operated. In addition,
Even if the lid opening / closing lever 39 is rotated in the direction in which the front end side is the lower side, the front lid 36 is rotated in a state in which the lower edge side is moved in the direction side by being pressed from the front side. It is operated and the lid is opened.

The lid opening / closing lever 39 is a tension coil spring stretched between a spring engaging hole 45 provided in the lid opening / closing lever 39 and a spring engaging portion 47 provided in the base frame 32. As indicated by an arrow L in FIG. 1, the rotary biasing force is applied in a direction in which the front end side is the lower side.

Further, the lid opening / closing lever 39 has, on the side surface facing the base frame 32, a copy plate portion 42 whose middle portion bulges downward.

The front lid 36 is provided with the control plate 55.
By rotating the lid opening / closing lever 39 in conjunction with the movement of the disk cartridge 1 in the front-back direction, the disk cartridge 1
The opening / closing operation is performed so as not to hinder the movement of 20, 121. That is, the lid opening / closing lever 39 places the copying plate portion 42 on the lid opening / closing operation pin 69 projecting to the side of the control plate 55.

The lid opening / closing lever 39 is used for the control plate 55.
Is in the above initial position, as shown in FIG.
Since the lid opening / closing pin 69 mounts the front end side portion of the copying plate portion 42, the front end side portion is positioned on the lower side, and the front lid 36 is maintained in the closed state.

Further, in the lid opening / closing lever 39, when the control plate 55 is in the play position or the REC position, as shown in FIGS. 15 to 17, the lid opening / closing pin 69 has the copying plate portion. Since the rear end side portion 42 is placed, the front end side portion is positioned on the lower side, and the front lid 36 is maintained in the closed state.

Then, in the lid opening / closing lever 39, as shown in FIG. 14, the lid opening / closing pin 69 follows the above-mentioned copying in a certain section in the middle of the time when the control plate 55 reaches the play position from the initial position. By mounting the central portion of the plate portion 42, the plate portion 42 is rotated in a direction with the front end side portion facing upward, and the front lid 36 is opened.

In the disc player device having the recording medium loading mechanism according to the present invention constructed as described above, as shown in FIG.
As shown by an arrow G in FIGS. 7 and 13, the disc cartridges 120 and 121 are inserted into the cartridge holder 54 from the front side. At this time, the front lid 36 is attached to the disk cartridges 120, 121.
The lid is pressed by the front end of the to open.

Then, the disk cartridge 12
As shown in FIG. 8, the front ends of the cartridge holders 0 and 121 are positioned on the positioning claws 91 and 93.
When the shutter members 106 and 117 are inserted to a predetermined position where the shutter members 106 and 117 are brought into contact with each other, the lids are opened. Further, at this time, the cartridge insertion detecting lever 56 is moved by the disc cartridges 120 and 121 by the arrow F in FIG.
As shown in FIG.
4 is rotated so as to be retracted onto the cartridge holder 54 so as not to project outward from the other side edge portion.

In this state, the disk cartridges 120 and 121 are further moved as shown by an arrow G in FIG.
When pressed backward, the engagement member 78 is rotated with respect to the control plate 55, as shown in FIG.
As indicated by arrow M in FIG. 9, 5 is moved to the rear by a short distance. Then, as shown in FIG. 18, the pressing operation on the loading start switch 50 is released, and the detection output from the loading start switch 50 changes from "H" level to "L" level.

When the detection output from the loading start switch 50 changes from "H" level to "L" level,
As shown in FIG. 18, the control circuit drives the loading motor 16 in the + direction (the direction in which the third transmission gear 28 is rotated counterclockwise in FIG. 6).

When the loading motor 16 is driven in the + direction, the control plate 55 is moved backward by the driving force of the loading motor 16 as indicated by an arrow N in FIGS. 10, 14 and 15. It is moved to the side.

When the control plate 55 reaches the play position, the play position detection switch 86 is pressed as shown in FIG. 11, and the play position detection switch 86 is opened as shown in FIG. The passed detection output changes from "L" level to "H" level.

When the detection output from the play position detecting switch 86 changes from "L" level to "H" level, the control circuit stops the loading motor 16 as shown in FIG. 18 (in FIG. 18). State indicated by "0").

At this time, the cartridge holder 54
16 is moved down to the chassis 1 side as shown by an arrow D in FIG. 16, and the held disk cartridges 120 and 121 are mounted in the disk cartridge mounting portion on the chassis 1. The cartridge holder 5
4 attaches each of the regulating pins 65, 65 to each of the edge portions 14, 1
When the lowering operation is performed toward the chassis 1 while moving along 5, the tension coil spring 73 is elastically displaced and stretched.

The disk cartridges 120 and 121
The chucking plate 102 is attracted to the magnet of the disc table 2 and the recording disc is positioned and held on the disc table 2.

In this state, the rotation operation of the disk recording disk by the spindle motor and the reading operation of the information signal from the recording disk by the optical pickup device 4 can be performed, and the reproducing operation can be executed.

When an instruction to execute the recording operation is input to the control circuit, the control circuit drives the loading motor 16 in the + direction as shown in FIG. Then, the control plate 55 is moved rearward as shown by an arrow N in FIGS. 12 and 17,
As shown in FIGS. 12 and 17, it is moved to the REC position.

That is, when the control plate 55 reaches the REC position, the REC position detection switch 52 is pressed as shown in FIG. 12, and the REC position detection switch 52 is operated as shown in FIG. The detected output passed is “L”
Change from level to "H" level.

When the detection output from the REC position detection switch 52 changes from "L" level to "H" level, the control circuit stops the loading motor 16 as shown in FIG.

When the control plate 55 reaches the REC position, as shown by an arrow S in FIG. 17, the front edge side of the head elevating and lowering operation plate 9 is lowered, so that the magnetic head device 7 is controlled by the objective. The lens 5 is moved down to the side of the lens 5 and brought into a state of substantially sliding contact with the recording disk.

In this state, the spindle motor can be used to rotate the disk recording disk, and the optical pickup device 4 and the magnetic head device 7 can be used to write information signals to the recording disk, thereby executing the recording operation. .

When an instruction to return to the reproducing operation is input to the control circuit, the control circuit causes the loading motor 16 to move in the -direction (see FIG. 6).
Inside, the third transmission gear 28 is driven in a direction in which the third transmission gear 28 is rotated clockwise. Then, the control plate 55 is moved forward as shown by an arrow P in FIGS. 12 and 17, and is moved to the play position as shown in FIGS. 11 and 16.

At this time, as shown in FIG. 18, the control plate 55 causes the loading motor 16 to move in the-direction until the detection output from the play position detection switch 86 changes from "H" level to "L" level. By being driven, it is once moved to a position slightly ahead of the play position. Next, the control plate 55 is moved to the rear side again by the loading motor 16 being driven in the + direction, and the detection output from the play position detection switch 86 becomes "L" level or more. When the loading motor 16 is stopped when the H level is changed, the loading motor 16 is stopped at the play position.

In this way, the control plate 55 is stopped at the play position in the same state as when the control plate 55 was moved from the initial position to the play position.

In this state, the rotation operation of the disk recording disk by the spindle motor and the reading operation of the information signal from the recording disk by the optical pickup device 4 can be performed, and the reproducing operation can be executed.

When an instruction to perform an eject operation is input to the control circuit, as shown in FIG.
This control circuit drives the loading motor 16 in the-direction. Then, the control plate 55 is moved forward as shown by an arrow P in FIGS. 11 and 16.

When the control plate 55 is moved to the front side, the cartridge holder 54 and the cartridge holder 54 are moved as shown by an arrow U in FIG.
It is lifted by being separated from the chassis 1. In addition,
An edge portion of the chassis 1 that opposes a lower side portion of the edge portion 14 and prevents the cartridge holder 54, which is lowered toward the chassis 1 side, from moving a restriction pin 65 forward. Are formed.

As shown in FIG. 15, when the cartridge holder 54 is separated from the chassis 1 and lifted by moving the control plate 55 forward, the tension coil spring 73 The control plate 55 returns to the initial state, which is the same state as when the control plate 55 is in the initial position.

That is, the cartridge holder 54
When the control plate 55 is operated to move to the front side, each of the copying pins 64, 64, 64, 64 is moved by each of the cam grooves 6
The above chassis 1 by following 8, 68, 68, 68
Although it is lifted up further apart, it is also assisted by the elastic restoring force of the tension coil spring 73.

That is, the disk cartridge 12
Nos. 0 and 121 cause a load to be lifted apart from the chassis 1 by the attraction force of the magnet with respect to the chucking plate 102, but are assisted by the elastic restoring force of the tension coil spring 73. Therefore, it is possible to easily climb.

Therefore, in this disc player device, the load on the loading motor 16 when separating the cartridge holder 54 from the chassis 1 is reduced.

The control plate 55 has the same structure as that shown in FIGS.
Further, as shown by an arrow P in FIG. 14, the movement operation is performed to the front side, and as shown in FIGS. 7 and 13, it is moved to the initial position. In this way, when the control plate 55 is moved forward toward the initial position, the front lid 36 is opened via the lid opening / closing lever 39 as shown in FIG. Therefore, the disk cartridge 12
The 0 and 121 are moved and operated below the front lid 36 and toward the front side on the chassis 1 without being brought into contact with the front lid 36.

At this time, as shown in FIG. 18, the control board 55 causes the control circuit to eject the detection output after passing through the loading start switch 50 from the "L" level to the "H" level. Completion detection switch 53
When the detection output that has passed through changes from "L" level to "H" level, the loading motor 16 is stopped to stop at the initial position.

At this time, the shutter members 106, 11
7 is closed by the shutter closing spring 63.

The cartridge insertion detecting lever 5
As shown by an arrow E in FIG. 7, 6 is a projection of the projecting piece on the front side of the end edge 15 to the side of the side edge of the chassis 1 so that the chassis of the cartridge holder 54. It blocks the backward movement of 1.

In this state, the disc cartridge 1
As shown in FIG. 6, 20, 121 can be pulled out forward of the cartridge holder 54.

[0158]

As described above, in the recording medium loading mechanism according to the present invention, the recording medium holder holding the recording medium is moved toward the recording medium mounting portion on the chassis by being moved with respect to the chassis. The control member that is moved by the above-mentioned operation is moved while elastically displacing the elastic displacement member.

Therefore, the control member is moved while being assisted by the elastic restoring force of the elastic displacement member when the recording medium holder is moved in the direction away from the recording medium mounting portion.

Therefore, when the recording medium holder is separated from the recording medium mounting portion, the load for moving the control member is reduced by an amount corresponding to the elastic restoring force of the elastic displacement member. If the control member is moved and operated by a motor, the motor can be downsized because the load applied is reduced.

That is, the present invention is a recording medium loading mechanism having a recording medium mounting portion for sucking and holding a recording medium, the load generated during the unloading operation is reduced, and the size and weight of the apparatus can be reduced. It is possible to provide a recording medium loading mechanism which is made as follows.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a recording medium loading mechanism according to the present invention.

FIG. 2 is a plan view showing the configuration of the recording medium loading mechanism in a transparent manner.

FIG. 3 is a right side view showing the configuration of the recording medium loading mechanism in a transparent manner.

FIG. 4 is a left side view showing the configuration of the recording medium loading mechanism as seen through.

FIG. 5 is a rear view showing the configuration of the recording medium loading mechanism in a see-through manner.

FIG. 6 is a plan view showing a configuration of a main part of the recording medium loading mechanism in an initial state.

FIG. 7 is a plan view showing a state in which a disc cartridge of a main part of the recording medium loading mechanism has started to be inserted.

FIG. 8 is a plan view showing a state where a disc cartridge of a main part of the recording medium loading mechanism is inserted.

FIG. 9 is a plan view showing a state in which a loading operation of a main part of the recording medium loading mechanism is started.

FIG. 10 is a plan view showing a state in the middle of a loading operation of a main part of the recording medium loading mechanism.

FIG. 11 is a plan view showing a state (play position) in which a loading operation of a main part of the recording medium loading mechanism is completed.

FIG. 12 is a plan view showing a state (rec position) in which a loading operation of a main part of the recording medium loading mechanism is completed.

FIG. 13 is a right side view showing a state in which a disc cartridge of a main part of the recording medium loading mechanism has started to be inserted.

FIG. 14 is a right side view showing a state where the loading operation of the main part of the recording medium loading mechanism is started.

FIG. 15 is a right side view showing a state in the middle of the loading operation of the main part of the recording medium loading mechanism.

FIG. 16 is a right side view showing a state (play position) in which a loading operation of a main part of the recording medium loading mechanism is completed.

FIG. 17 is a right side view showing a state (rec position) in which the loading operation of the main part of the recording medium loading mechanism is completed.

FIG. 18 is a time chart showing a relationship between operations of a loading motor and a detection switch in the recording medium loading mechanism.

FIG. 19 is a perspective view of the recording / playback disk cartridge used in the recording medium loading mechanism as seen from the upper surface side.

FIG. 20 is a perspective view of the recording / reproducing disk cartridge as viewed from the bottom side.

FIG. 21 is a perspective view of the read-only disc cartridge used in the recording medium loading mechanism as seen from the upper surface side.

FIG. 22 is a perspective view of the reproduction-only disc cartridge as viewed from the bottom side.

[Explanation of symbols]

 1 Chassis 2 Disc Table 3 Positioning Pin 4 Optical Pickup Device 54 Cartridge Holder 55 Control Plate 73 Tension Coil Spring 120 Recording / Reproducing Disk Cartridge 121 Reproduction-Only Disk Cartridge

Claims (2)

[Claims] 1. A recording medium mounting portion for positioning and adsorbing and holding a recording medium on a chassis and for recording and reproducing an information signal on the recording medium, and moving on the chassis in a contacting and separating direction with respect to the chassis. A recording medium holder that is operably arranged to hold the recording medium and mount the recording medium on the recording medium mounting portion; and a recording medium holder that is movably arranged with respect to the chassis and is moved. A control member for moving the recording medium holder in a direction toward and away from the chassis via a cam mechanism, and an elastic displacement member attached to the control member, wherein the control member includes the recording medium holder. When moving in the direction that will be moved to the chassis side,
A recording medium loading mechanism configured to move while elastically displacing the elastic displacement member. 2. The control member is moved while being assisted by the elastic restoring force of the elastic displacement member when the recording medium holder is moved in a direction in which the recording medium holder is moved away from the chassis. The recording medium loading mechanism described.