JPH0325325Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a disc record playback device suitable for, for example, a DAD (digital audio disc), and particularly to its disc loading mechanism. Recently, in the field of audio equipment, digital recording and playback methods that utilize PCM (pulse code modulation) technology are being adopted in order to achieve high-fidelity playback as much as possible. In other words, this is what is called digital audio conversion, and the principle is that the audio characteristics are far superior to conventional analog systems without depending on the characteristics of the recording medium. This is because it has been established. In this case, a system that uses a disk as a recording medium is called a DAD system.
Optical, electrostatic, and mechanical playback methods have been proposed, but no matter which playback method is adopted, the playback device that embodies it is still a conventional one. It is required to be able to satisfy various advanced functions and performances that are not commonly seen before. For example, among optical playback methods, the one proposed as the CD (compact disc) method uses a CLV (constant linear velocity) method to play a disc with a diameter of 12 cm and a thickness of about 500 to 200 r.p.m. Although the disc is driven at a variable rotation speed, it is said that the track pitch of this disc is 1.6 μm and that it stores a huge amount of information that can be played in stereo for about an hour on one side. It makes sense. In particular, since the disk is held vertically for loading, there is a problem in that the signal recording surface of the disk is likely to be damaged during loading, including when the disk is introduced. Therefore, this idea was made in view of the above points, especially in a disc record playback device that loads the disc in a vertical position.
It is an object of the present invention to provide an extremely good disk loading mechanism capable of loading a disk with a simple configuration and with a reliable protection function for the disk signal surface. That is, the disk loading mechanism according to this invention can be opened and closed at the front surface of the cabinet, which is the position for vertically inserting the disk to be loaded, and has a turn disposed in the front surface and the cabinet, which is the playback position of the disk. It is movably supported between a table facing part, and includes a front introduction part that guides the front side of the disk, which is the non-signal recording surface, at the front part of the cabinet, and a back side, which is the signal recording surface of the disk. and a back surface formed in a state that does not cover the optical axis of an optical pickup disposed in the cabinet to face the disk, and capable of holding the disk in a substantially vertical state. from the center to the periphery so that the back surface is substantially non-contact with the signal recording surface on the back side of the disk at both the front surface of the cabinet and the turntable facing section. It is characterized by being formed at an angle. Hereinafter, a case where the present invention is applied to a CD type DAD reproducing apparatus as an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the front introduction part is made up of the front holders 106 and 119, the back part is made up of the back holder 105, and the disk holding part is made up of the disk pocket part 170. FIG. 1 shows an external perspective view of a CD-based DAD playback device, and above all, the DAD (hereinafter simply referred to as disk) loading mechanism section 100 provided on the front panel of the cabinet 10 is connected to the eject operation key (EJECT). Depending on the operation, the illustrated arrow A
It has a so-called kangaroo pocket type in which it pops out rotationally in the direction, and by simply inserting a disk (not shown) vertically into the pocket, it is automatically loaded into the drive position for vertical playback. It is characterized by the fact that it is done as follows,
The details will be described later. In addition, (POWER) in FIG. 1 is a power operation key that is operated prior to operating the eject operation key (EJECT), below (FF) is a fast forward operation key, (BACKWARD) is a reverse operation key,
(STOP) is a stop operation key, (PLAY) is a playback operation key, and (PAUSE) is a pause operation key.
Further, 200 is a disk drive and playback mechanism provided in the cabinet 10, the details of which will be described later. And 1
Reference numeral 1 denotes a printed wiring board on which a disk drive and reproduction circuit, etc. are mounted. Further, reference numeral 12 indicates various display sections provided on the front panel of the cabinet 10. First, the disk loading mechanism section 100 will be described. FIGS. 2 and 3 show the state before and after disk loading, respectively. Further, FIGS. 4 and 5 respectively show a state in which the interior of FIG. 3 is seen through and a state in which a part is cut away. First, to briefly describe the outline of the disk loading function with reference to FIG. 2 (however, the disk 101 is not shown), a pair of left and right loading levers 118 and Main link 103,
120 is pulled in the direction of arrow B, and as a result, the holder 105 having the pocket portion 170 for inserting the disk and the disk clamper portion 180 are also pulled in the same direction.
This leads to the state shown in FIG. Here, the motor 139 shown in FIG. 6 is used as the power source, and the motor 139 is attached to the lower part of the rear surface of the chassis 124, which is approximately U-shaped in plan, with its motor shaft directed downward through a motor mounting plate 141. It is installed in the same condition. The lower end of the drive shaft 135 is fitted onto a pulley 137 connected via a belt 138 to a motor pulley 140 attached to the motor shaft. Here, the drive shaft 135 has an upper end supported by a bearing 133 press-fitted into a bent portion at the upper rear surface of the chassis 124, and a nut 144 near the lower end of the drive shaft 135 which is press-fitted into a bent portion at the lower end of the rear surface of the chassis 124. By being inserted into the bearing 36 fixed by the motor 139, it can move in the forward and reverse directions of the motor 139 and also be freely rotatable in the forward and reverse directions. Threaded portion 1 in approximately the upper half of this drive shaft 135
35a and the substantially lower half non-threaded portion 135b, the main slider 123 is fitted at bent portions above and below the center thereof. In other words, the main slider 123
is moved downward in the direction of arrow E in the figure by rotation of the drive shaft 135 in the direction of arrow C, and in the direction of arrow F upward in the figure by rotation of the drive shaft 135 in the direction of arrow D. In this case, main slider 1
The movement stroke of 23 is the main slider 12.
By controlling the motor drive circuit (not shown) on and off via micro switches 142 and 143, which are turned on and off at the upper and lower sides of the drawing, by reference numerals 3 and 3, it is regulated to ensure that there is no excess or deficiency. FIG. 2 shows a state in which the main slider 123 has completely moved downward, and FIG. 3 shows a state in which the main slider 123 has completely moved upward. The links 1 each have a long hole at one end pivoted at the bottom of the bent pieces on both sides of the main slider 123.
22 and 145 are connected at their respective other ends to respective one ends of connection levers 121 and 146 whose sides are approximately L-shaped. The connecting levers 121, 146 are attached to the pillars 14 attached to the lower sides of the chassis 124 at their corners.
The loading lever 11 is rotatably supported with respect to the loading lever 11, and the other end is rotatably supported with respect to the loading lever 11.
8 (however, the connection lever 146 side is not shown). Here, the rollers 147 are configured to slide along oblique elongated holes 160 formed in the lower portions of both sides of the chassis 124. Further, the aforementioned main link 12 whose lower end is pivotally supported at the tip of the loading lever 118
0 and 103 are rotatably supported at both front sides of a top cover 125 mounted on the chassis 124 at their upper ends. In addition, in the above, coil springs 12 are provided between the support portions at both ends of the links 122 and 145, respectively.
8,167 is attached. On the other hand, the disk clamper part 180 is supported by a clamper presser lever 111 which is rotatably supported at the center with respect to a pair of shafts 107 and 117 attached to the inside tips of a pair of left and right loading levers 118.
have. The link mounting plate 112, which is positioned in front of the clamper presser lever 111 and erected on the loading lever 118, has two links 109, 110 and 11 on both sides and above and below.
3,114 via the clamper presser lever 111
A clamper holder 127 located on the rear side is supported rotatably (translationally). In this case, the clamper presser lever 111 and the clamper holder 127 are attracted to each other by the engagement spring 166, and the collar of the clamper 126 protruding from the elongated hole of the clamper holder 127 is disposed between them. Hold the clamper 126 between the clamper levers 1 and 126.
11 direction (however, the state shown in Fig. 2) is lightly pressed. Further, the levers 108 and 116 whose distal ends are rotatably supported by the pair of shafts 107 and 117 are connected at their base ends by a connecting bar 129 (see FIG. 4). . The holder 105 is rotatably supported by the main links 103 and 120 at the lower portions of both sides thereof, and the holder lever 150, which has a substantially U-shaped plan view and whose base end is attached to the rear side of the holder 105, is attached to the holder lever 150. The rollers 151 provided at the tips of both sides are formed in the inclined elongated hole 1 formed at the bottom of both sides of the chassis 124.
52 so as to be slidable. In other words,
The inclination of the holder 105 is changed depending on the position of the roller 151 in the inclined elongated hole 152 (see FIG. 5). The cover 102 rotatably supported on the upper end of the holder 105 has a spring 102 engaged between it and the center of the front end of the top cover 125.
The top cover 125 is constantly pulled slightly by the top cover 125. Further, by attaching a pair of front holders 106 and 119 to the left and right front sides of the holder 105, a pocket portion 170 for inserting a disk is formed between the opposing portions. A disk support lever 115 is provided at the bottom of the portion 170 . Here, the disk support lever 115 is rotatably supported by the holder lever 150 as shown in FIG.
(see FIG. 8), is always biased in the direction of arrow H, and is pressed against an adjustment screw 155 attached to the holder lever 150. A clamp lever 130 is rotatably supported by a clamp lever mounting plate 131 via a shaft 132 behind the holder lever 150. This clamp lever mounting plate 131 is attached to the chassis 1.
It is attached to the rear plate part of 24. A bush 156 is attached to the rear end of the clamp lever 130 at a position passing through the chassis 124, and the bush 156 is attached to the slider 134 (see FIG. 8). Here, the slider 134 has its long hole connected to the pin 12 provided at the bottom of the main slider 123.
A spring 158 is engaged between the bush 156 and a pin 157 that is engaged with the bush 156 and is attached to the bent portion of the pin 157. In addition, 159 in FIG. 5 is a holder lever 150.
This is a reflective sensor for disc detection attached to the disc. Further, reference numeral 161 is a turntable for driving a disk that is provided to protrude from the introduction hole 105a (see FIG. 2) on the back side of the holder 105, and has a guide 161a that is fitted into the center hole of the disk 101. . In this case, the turntable 161 is supported by the shaft of a disk drive motor 162 supported within the chassis 124, which will be described in detail in the disk drive and playback mechanism section 200 described later. . Next, the details of the disk loading operation in the above configuration will be explained.
FIG. 8 shows the relationship of the main parts when viewed from the right side of the state shown in FIG. 2 in which the disk pocket portion 170 is fully opened outward. That is, in this state, the main slider 12
3 is too low and the loading lever 11
8 is pushed up to the uppermost end of the elongated hole 160, so that the disk clamper portion 180 is in a state of being inclined outwardly. However, in this case, the disk pocket section 170
Since the holder lever 150 is regulated by the elongated hole 152, the inclination of the disk clamper section 180 and the lid 16 provided on the outside thereof are limited.
It has a small slope compared to 3. In this state, the disk pocket section 170
When a disk 101 (not shown) is inserted, the aforementioned reflection sensor 159 detects this and provides a start signal to a drive circuit (not shown) for the motor 139 to drive the motor. Here, the disk 101 inserted into the disk pocket part 170 is attached to the support pins 115a and 115b of the disk support lever 115 at two locations on the lower side.
(see FIG. 9), so that the center of the disk substantially coincides with the center of the turntable 161. When the main slider 123 is moved upward as described above by the drive of the motor 139, the loading lever 118 is pushed down toward the lower end of the elongated hole 160 via the link 122 and the connecting lever 121. As a result, the disc clamper section 180 and the disc pocket section 1
70, and the action of pulling in the direction of arrow B is started. FIG. 10 shows that the disk 101 is
The disc clamper part 180 and the disc pocket part 170 are shown in a state where they have been retracted to the instant when they are about to be pushed onto the turntable 161. In this state, the main slider 123 has been moved considerably upward, and the loading lever 1
18 has one end located exactly at the boundary between the inclined portion and the horizontal portion of the elongated hole 160. In other words,
The loading lever 118 is the main link 120
Although it is slightly tilted because it has not reached the vertical position, it is almost horizontal. FIG. 11 shows the state of the disk clamper section 180 at this time. That is, in this state, the clamper 126 is held almost vertically between the clamper press lever 111 and the clamper holder 127, which are the same as in the state shown in FIG. 8, and the disk 101 is brought into contact with the clamper 126 by gravity. Even if it is tilted in the direction of contact, it will not tilt as a result. Conversely, during the movement process, the disk 101 is moved to the turntable 16.
1, the disc 101 is pressed against the clamper 126, which is moved in the same direction, due to the frictional force between the turntable 161 and the turntable 161. It is accompanied by In addition, in this state, the disk support lever 115
is in the same state as in FIG. 8, but one end is held in contact with the bent portion of the clamp lever mounting plate 131. Further, the connecting bar 129 connecting the left and right levers 108 and 116 is in contact with the clamp lever 130, but since the spring 158 is not yet extended, only a weak pressure is applied by the spring 168 of the clamp lever 130. do not have. Note that the upper end portions of the left and right levers 108 and 116 are in light contact with the link pins 164 and 165. Figures 12 and 13 show the state in which disk loading has been completed, with the main slider 1
23 is going up and it's tight. In addition, the left and right connecting levers 121, 146 are connected to springs 128, 16.
7, and pulls the loading lever 118 backward along the elongated hole 160. Then, the clamp lever 130 is attached to the slider 1
34 has been moved upward by the main slider 123, it is rotated in the direction of arrow I in the figure under the tension of the spring 158, thereby pushing down the connecting bar 129. This results in
When the left and right levers 108, 116 are rotated to press the link pins 164, 165 in the direction of arrow J in the figure with their respective upper end curved portions, the links 109,
113, 110, and 114 are rotated to push down the clamper holder 127 in parallel. In other words, as shown in FIG. 14a, the clamper holder 127 had previously been fitted to the clamper 126 at the lower part of its elongated hole 126a;
Links 109, 113 at the same time as being moved in the direction
and 110, 114, this time the first
As shown in FIG. 4B, parallel movement is also carried out in the downward direction in the drawing so that the elongated hole 126a is fitted at the center thereof. Further, at this time, since the clamper presser lever 111 is pushed in the direction of arrow J by the bent portions 108a and 116a at the upper ends of the left and right levers 108 and 116, the clamper 126 is also pushed in the same direction. In this case, since the disk 101 is in contact with the turntable 161, the clamper 126 is pressed toward the turntable 161 with a constant pressure determined by the spring 158. In this state, the clamper 126 is placed between the clamper 126 and the clamper holder 127.
Sufficient clearance is created for rotation. In addition, since the rear end of the disk support lever 115 is in contact with the bent end of the clamp lever mounting plate 131 and the front end is rotated horizontally,
The support pins 115a and 115b are the disk 10
1 (see Figure 15). That is, as described above, the disk 101 is loaded onto the turntable 161 and becomes rotatable by the motor 162, which means that the series of operations necessary for disk loading is completed. It should be noted that the anti-loading operation for removing the disk 101 from this state will be omitted since it can be performed by following the completely opposite process to the above-described loading operation. In addition, when the disk loading is completed, the pick-up introduction hole 10 on the back side of the holder 105
Optical pick-up from section 5b (see Figure 2)
The PU is exposed (see FIGS. 18 and 19) and the signal surface of the disk 101 is reproduced in a linear racking manner, which will be described in detail in the disk drive and reproduction mechanism section below. Next, the features of the disk loading mechanism section 100 as described above will be explained. First, in order to easily and reliably load a disk, the disk 101 can be automatically loaded into a predetermined drive position by simply inserting the disk 101 into the disk pocket 170 in a substantially vertical position. One example is the vertical disk loading mechanism. This vertical disk loading mechanism has one main link on the front of the cabinet.
A disk pocket section 170 for inserting the disk 101 and a disk clamper section 180 for clamping the disk 101, which are commonly supported by 20 and 103 so as to be openable and closable with the upper end as a fulcrum, and the lower ends of these disk pocket section 170 and disk clamper section 180 . The disc pocket part 170 and the disc clamper part 1 are connected in common.
Power transmission mechanism 118, 1 that opens and closes 80
21, 122, and a power source 139 that transmits power to this power transmission mechanism. The second point is that in the above-mentioned vertical disk loading mechanism, the disk pocket portion 17
The disk clamper section 180 is provided with a function of correcting the inclination of the disk 101 inserted into the disk 101.
The pressing force required for this is reduced as much as possible, thereby contributing to a smaller, lighter, and simpler structure, and at the same time, damage to the disk can be prevented. Then, the clamper 126 of the disk clamper section 180 moves the disk 101 inserted into the disk pocket section 170 onto the turntable 16.
This is achieved by adding a clamper control mechanism to the above-mentioned vertical loading mechanism to make the rear end surface of the clamper 126 parallel to the surface of the turntable 161 immediately before pressing in one direction. The third point is that in the above-mentioned vertical disk loading mechanism, the disk pocket portion 17
One point is that the disk pocket portion 170 has the function of centering the disk inserted into the disk, thereby further promoting the same effect as the second point mentioned above. This means that the center hole of the disk 101 inserted into the disk pocket portion 170 is inserted into the guide 161a of the turntable 161 at least from just before the center hole is fitted to the guide 161a of the turntable 161 until the center hole of the disk 101 is fitted into the guide 161a of the turntable 161.
01 is at the same height as the center of the turntable 161, and the disk 101 is in a state where the center hole of the disk 101 has finished fitting into the guide 161a of the turntable 161. a second position in which the disk support control mechanism 1 is separated from the disk support control mechanism 1;
15 to the above-mentioned vertical loading mechanism. The fourth point is that in the above-mentioned vertical disk loading mechanism, the disk clamper section 1
The clamper 126 of 80 is attached to the disk pocket part 1.
When pressing the disk 101 inserted into the turntable 70 toward the turntable 161, the clamper 126
After the guide 161a of the turntable 161 and the guide 161a of the turntable 161 are fitted together, the clamper 126 presses the disk onto the turntable 161.
One of the points is that the disk clamper section 180 is provided with a function of controlling the timing of clamping with respect to 1, thereby achieving the same effect as the second point mentioned above. This is because the clamper control mechanism 116 applies a predetermined pressing force in the direction of the turntable 161 to the clamper 126 after the disk 101 is fitted into the guide 161a of the turntable 161. This is achieved by adding it to the loading mechanism. The fifth point is that in the above-mentioned vertical disk loading mechanism, the disk pocket portion 17
A sensor 159 for detecting the insertion state of the disc 101 inserted into the disc pocket 170 is installed separately from the optical pickup for disc playback.
By providing the disc 101 in itself, the presence or absence of the disc can be detected before the disc 101 is loaded into a predetermined drive position, that is, the turntable section. In this case, the disk pocket section 170
The mounting position of the disk sensor 159 is at the bottom of the disk pocket part 170 on the disk 101.
If you set the position slightly above the outermost part of
It is also possible to determine whether the disk 101 is improperly inserted (see FIG. 16). Next, the disk pocket portion 17 in the vertical disk loading mechanism 100 as described above will be explained.
Various feature points applied to 0 will be explained. The first point is a first position in which the disc pocket part 170 into which the disc 101 is inserted is moved to the front side of the turntable 161 in the disc inserted state, and a first position in which the disc pocket part 170 into which the disc 101 is inserted is moved to the front side of the turntable 161 and the disc pocket part 170 is moved from the first position to the disc pocket part 170 in which the disc 101 is inserted.
1 on the turntable 161 and has a second position in which the disk 101 loaded on the turntable can be rotated inside the disk pocket part 170 , the entire vertical disk loading mechanism The point is that the structure of the system can be made organic and rational. The second point is the gist of this idea,
The opening for inserting the disk in the disk pocket part 170 is made narrower on the peripheral side of the disk 101 and wider on the center side of the disk 101, so that the opening in the disk pocket part 170 is made at least in the center part without contacting the signal side of the disk 101. By adopting a structure that is inclined from the top to the peripheral edge, it is possible to prevent damage to the signal surface of the disk during disk loading, including when inserting the disk (Fig. 17a, b, c). The third point is that the disk moves to a first position in front of the turntable 161 when the disk is inserted, and a second position that moves from the first position and allows the disk 101 to be loaded onto the turntable 161 when the disk is loaded. It is rotatably supported using the upper back surface of the pocket portion 170 as a fulcrum,
By providing the cover 102 which is inclined rearward on the back surface of the disk pocket section 170 in the first position and upright above the back surface of the disk pocket section 170 in the second position, the upper end of the disk 101 is protected when the disk is inserted. One of the features is that a space for grasping is formed at the rear to facilitate the insertion and removal of the disk. In this case, it may be possible to fix the cover in an inclined position from beginning to end, but doing so would avoid the inconvenient situation of the cover hitting the disc playback pickup located at the rear of the disc pocket. arise. Further, by providing the rotatable cover 102, there is an advantage that the size of the disk pocket portion 170 and the overall size of the device can be made as small as possible. The fourth point is to prevent the disc 101 from being incorrectly inserted into the turntable introduction hole 105a and the pick-up introduction hole 105b, which are formed in connection with the back surface of the holder 105 of the disk pocket part 170 . As shown in FIGS. 18a and 18b, guides 105c and 105d are formed in the form of claw-like protrusions whose lower side with respect to the upper and lower connecting portions of both introduction holes 105a and 105b is inclined rearward. In other words, both the introduction holes 105
When the disk 101 attempts to be incorrectly inserted into the joint between the disks 105a and 105b, the lower end of the disk hits the rearwardly inclined lower guide 105d, preventing the disk from entering, and the disk pocket 170
It is something that begins to slide inside. Note that the guide may be formed on a substrate (not shown) provided at the rear of the holder 105. The fifth point is that the upper ends of the front holders 106 and 119 constituting the disc pocket part 170 are at least connected to the introduction hole 10 of the disc pocket part 170.
Optical pickup (described later) exposed from section 5b
Height of optical axis L of PU section (this is turntable 1
By extending the installation to a higher position (equal to the center height of 61), the light emitted from the optical pick-up section is prevented from directly leaking to the outside, and is a safety measure for the human body (especially in the case of a laser light source). (See Figure 19). It is also assumed that this is ensured even when the disk pocket section 170 is opened.
Furthermore, it is even more effective if the upper ends of the front holders 106 and 119 are made opaque. It goes without saying that this invention is not limited to the embodiments described above and illustrated, and that various modifications and applications can be made without departing from the gist of this invention. Therefore, as detailed above, according to this invention, it is possible to load a disk with a simple structure and with a reliable protection function for the disk signal surface, especially in a disk record playback device that loads the disk in a vertical position. Thus, it is possible to provide an extremely good disk loading mechanism.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing a CD-type DAD playback device applied as an embodiment of this invention;
2 and 3 are side perspective views showing the disk loading mechanism shown in FIG. 1 before and after loading, respectively, and FIGS. 4 and 5 are respectively a perspective view of the inside of FIG. 6 is a rear perspective view showing the power transmission section of the disk loading mechanism in FIG. 1, and FIGS. 7 to 15 are respectively from FIG. 2. A side view, a side perspective view, and a front view of the main parts to explain the series of loading operations leading to the state shown in FIG. 3, and FIGS. 16 to 19 respectively show the disk pocket in the disk loading mechanism shown in FIG. 1. FIG. 2 is a side view, a plan view, and a front view of the main part for explaining various feature points provided on the part. 10...cabinet, 11...printed wiring board,
12...display unit, 100 ...disc loading mechanism unit, 200 ...disk drive and playback mechanism unit, 101...disk, 102...cover,
103,120...Main link, 104,12
8,149,158,166,167,168...
... Spring, 105 ... Holder, 106,1
19...Front holder, 107, 117...
Shaft, 108, 116... Lever, 109, 11
0,113,114...link, 111...clamper presser lever, 112...link mounting plate, 1
15... Disc support lever, 118... Loading lever, 121, 146... Connection lever,
122, 145... Link, 123... Main slider, 124... Chassis, 125... Top cover, 126... Clamper, 127... Clamper holder, 129... Connection bar, 130
... Clamp lever, 131 ... Clamp lever mounting plate, 132 ... Shaft, 134 ... Slider,
135... Drive shaft, 133, 136... Bearing, 1
37...Pulley, 138...Belt, 138...
Motor, 140... Motor pulley, 141... Motor mounting plate, 142, 143... Micro switch, 144... Nut, 147, 151... Roller, 148... Support column, 150... Holder lever, 152, 160... Slanted long hole, 155...adjustment screw, 156...button, 157...pin,
159...sensor, 161...turntable, 162...motor, 163...lid, 164,
165...link pin, 170 ...disc pocket section, 180 ...disc clamper section, 10
5a, 105b...Introduction hole, 105c, 105d
...Guide, PU...Pick up.

Claims (1)

[Scope of utility model registration request] Supported so as to be openable and closable at the front face of the cabinet, which is the position for vertically inserting the disc to be loaded, and to be movable between this front face and a part facing the turntable disposed in the cabinet, which is the playback position for the disc. A front introduction part that guides the front side of the disk, which is a non-signal recording surface, and a front introduction part that is arranged in the cabinet so as to face the back side of the disk, which is a signal recording surface. and a disk holding section for vertical loading of the disk, which is capable of holding the disk in a substantially vertical state, the disk holding section having a rear surface that is formed so as not to cover the optical axis of the optical pickup. It is characterized by being inclined from the center to the periphery so that both the front surface of the cabinet and the portion facing the turntable are substantially non-contact with the signal recording surface on the back side of the disk. Disc loading mechanism.