JPH0115016Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc clamping mechanism for a disc player, and more particularly to a disc clamping mechanism for a disc player that automates disc playing procedures such as placing a disc on a turntable and clamping the disc.

A disc clamping method for a disc player in which the disc playing procedure is automated includes a pressing member that works together as a turntable to clamp the disc and rotate together with the turntable, and a pressing member that can swing freely relative to the player housing. A supporting member is provided to rotatably support the pressing member at the swinging end thereof, and urging means is provided for urging the supporting member in a direction toward the pressing member turntable. Many devices are used in which the disk is clamped and unclamped by swinging the support member in conjunction with the eject operation. Specifically, the support member includes a pair of arm portions that are swingably supported by support shafts that are disposed on both left and right sides of the player housing and extend parallel to the rotation surface of the turntable, and both arms. There is a bridge part that is installed between the swinging ends of the arms and rotatably supports the pressing member at approximately the center of the bridge part, and applies force for swinging to one arm part. This allows both arm sections to swing synchronously via the bridge section. Further, as the biasing means, a pair of left and right coil springs connected to each swinging end of each arm section is provided.

In the disk clamp mechanism having such a structure, when one arm comes into contact with the player housing during the swinging of the support member and a frictional force is generated between the arm member and the player housing, only the other arm As a result, the supporting member as a whole swings in a distorted shape, which is not preferable for accurate disk clamping.

The present invention has been made in view of the above points, and its purpose is to provide a disk clamping mechanism that can accurately clamp a disk.

The disk clamping mechanism according to the present invention includes a pressing member that clamps a disk placed on the disk supporting surface of a turntable toward the disk supporting surface, and a pressing member that clamps the disk placed on the disk supporting surface of the turntable between a clamping position and a non-clamping position with respect to the disk supporting surface. A support member consisting of a pair of swingably provided arm parts and a bridge part installed between the free ends of both arm parts to rotatably support the pressing member, and a driving force applied to the support member. A disk clamping mechanism comprising a driving force applying means, the arm part being rotatably supported around a rotation axis substantially parallel to the bridge part and engaging with each free end part of the pair of arm parts. The invention is characterized in that it has a synchronizing member.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A front loading disk player equipped with a disk clamp mechanism according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates the entire front loading disc player.

As shown in FIG. 1, the front panel 3 of the housing 2 is provided with a rectangular opening extending in the left-right direction so that a disk carrying portion, which will be described later, can protrude outside the housing. However, the left and right direction referred to here refers to the front direction indicated by arrow Y. Therefore, the direction of arrow X in the figure indicates leftward, and the direction of arrow Z indicates upward. The front panel 3 is also provided with a group of operation buttons 5 for operating the disc player. As shown in FIG. 2, a chassis 6, which is made of a processed steel plate or the like and forms a part of the housing, is fixedly installed within the housing body. As also shown in FIG. 2, a plurality of horizontal rollers 7a and vertical rollers 7b are pivotally supported at the front end of the upper surface of the chassis 6. The tray 8 is supported slidably in the front and rear directions by these rollers 7a and 7b. More specifically, a pair of guide rails 10 are attached to the lower surface of the tray 8 and extend in the front-rear direction.
a and 10b are the horizontal roller 7a and the vertical roller 7b
It is slidably engaged with. Further, an opening 3 of the front panel 3 is provided at the front end of the tray 8.
A movable panel 11 that can fit into and close a
is installed.

For example, as shown in FIG. 7, the tray 8 includes
can protrude to the outside of the housing 2 together with the tray;
A container 14 that cooperates with the tray and supports a disc 13 (see FIG. 1) to be played is provided so as to be movable in the vertical direction. The container 14 and the tray 8 constitute a disk carrier. Also, disk 1 is on container 14.
A friction member is attached to 3 to apply a frictional force. Note that the disk 13 uses a laser beam to record and read signals.

As is particularly clear in Figures 4 and 7,
The tray 8 is provided with a substantially circular opening 14 into which a disk 13 can be inserted. The container 14 is disposed on the back side of the tray 8 so as to be movable in the vertical direction so that the opening 15 is closed. As shown in FIGS. 7 and 11, the peripheral edge of the opening 15 is provided with, for example, four claws 15a extending toward the container 14, preferably pairs of claws 15a facing each other. A tapered portion 15b that slopes from the inside toward the outside toward the container 14 is formed at the tip of each claw portion 15a.

As shown in FIG. 3, FIG. 4, FIG. 7, FIG. 8, FIG. 9, and FIG. It is provided so as to be freely movable in the front and rear direction via. The cam members 18 and 19 are each formed with cam holes 18a and 9a that are slidably engaged with each pair of four engagement pins 14a fixed to the container 14. Cam hole 18a
The cam hole 19a has a tapered portion that slopes upward from the front toward the rear, and the cam hole 19a has a tapered portion that slopes downward from the front toward the rear. Therefore, the container 14 is moved up and down by the relative movement of both cam members 18 and 19.

As is clear from FIGS. 2, 3, 5, and 8, a moving member 21 is disposed on the lower surface of the right end of the chassis 6, and a pair of pins protruding from the lower surface of the chassis 6. It is attached to the chassis 6 via the shaft 6a so as to be movable in the front-rear direction. A rack portion 21 is provided on the left side of the front end of the moving member 21.
a is formed. A gear 22 is pivotally mounted on the lower surface of the chassis 6 and meshes with the rack portion 21a. A motor 23 is disposed near the gear 22 and is fixed to the chassis 6 via a bracket 23a. The output shaft of the motor 23 is connected to the gear 22 via a speed reduction mechanism including a belt 24a, a pulley 24b, a worm 24c, a worm wheel 24d, and the like. By the speed reduction mechanism, motor 23 and gear 22, the moving member 21
A drive source is configured to drive the.

By the way, as is particularly clear in FIGS. 4 and 8, the right cam member 19 of the pair of cam members 18 and 19 has a connecting lever 27 connected to the shaft 2.
It is rotatably provided via 7a. Further, the coupling lever 27 is applied with a bias force in the counterclockwise direction in FIG. 4 by a coil spring 27b. A pin 2 is attached to the front end of the connecting lever 27.
7c extends downward and projects, and the pin can engage with two engaging portions 21b and 21c formed approximately at the center of the moving member 21. The engaging portion 21c includes a tapered portion that slopes rightward from the front toward the rear, and a portion that is connected to the rear end of the tapered portion and extends left and right. Connection lever 2
The rear end portion of the tray 7 is bent toward the right, and when the bent portion 27d engages with a locking recess 8a (see FIG. 7) formed in the tray 8,
The cam member 19 is adapted to be locked relative to the tray until the tray reaches its storage position within the housing 2.

The above connection lever 27, coil spring 27b
A connecting mechanism that connects the cam member 19 and the moving member 21 when the tray 8 is housed in the housing 2 is constituted by the small peripheral members related thereto. Moreover, this connection mechanism and the moving member 2
1, the drive source including the motor 23 and driving the moving member 21, and peripheral small members related thereto constitute a driving force applying means for applying a driving force to the cam member 19 in the front-rear direction. ing.

Next, a mechanism for interlocking the left and right cam members 18 and 19 provided on the tray 8 will be explained. As shown in FIGS. 4, 5, and 7, a support shaft 29a extending in the vertical direction is protruded from the rear end of the tray 8, and a bracket 29 is fixed thereto. A rotary lever 30 whose both ends are pivotally connected to the rear ends of the cam members 18 and 19 is attached to the support shaft 29a so as to be rotatable within a predetermined range. These support shafts 29a and rotating levers 30
This constitutes an interlocking mechanism that interlocks both cam members 18 and 19. An eject lever 32 is arranged near the bracket 29, and is swingably attached to the tray 8 with a screw 32a. A shaft 32b is fixed to the swinging end of the eject lever 32, and the shaft can come into contact with the inner wall surface of the rear end of the chassis 6. The eject lever 32 is biased by a coil spring 33 toward its swinging end, that is, toward the inner wall surface of the rear end of the shaft 32b of the chassis 6.

Next, a description will be given of a prohibition means that prohibits the disk holder comprising the tray 8 and the container 14 from moving relative to the housing 2 when the disk holder is accommodated in the housing 2.

As shown in FIG. 7, two plates 35a and 35b are fixed to the lower surface of the front end of the tray 8, and a pair of left and right locking pins 36a and 36b are protruded from the lower surface of one plate 35b. has been done. On the other hand, as shown in FIG. 2, a prohibition plate 38 is provided on the upper surface of the front end of the chassis 6 so as to be slidable in a direction perpendicular to the moving direction of the tray 8, that is, in the left-right direction. At both ends of the prohibition plate 38, engaging portions 38a are provided which can engage with the locking pins 36a and 36b, respectively. In addition, the prohibition plate 38 is a coil spring 38b.
is biased toward the left, that is, in the direction of engagement with the locking pins 36a and 36b. A blocking lever 39 is swingably provided at the left end of the inhibiting plate 38 via a shaft 39a. A protrusion 39b extending forward is formed at the swinging end of the blocking lever 39, and when this protrusion 39b comes into contact with a predetermined contact portion 6b formed on the chassis 6, the coil spring 39 is biased in the biasing direction. That is, movement of the inhibition plate 38 to the left is prevented. The blocking lever 39 is also biased clockwise in FIG. 2 by a coil spring 40.

Here, the locking pin 36 of the prohibition plate 38
The engaging portion 38a with the locking pin 36a and 36b
a and 36b to press the prohibition plate in the opposite direction to the biasing direction, that is, to the right; and a locking pin 36a that is formed to extend in the left-right direction behind the taper part 38c. ，
36b and a notch 38b into which the cutout 36b can fit. Further, after the locking pins 36a and 36b engage with the tapered portion 38c, the locking pins engage with the swinging end of the blocking lever 39, and the protrusion 3 provided on the swinging end
The contact state between the contact portion 9b and the predetermined contact portion 6b is released.

The above-mentioned prohibition plate 38, coil spring 38b, blocking lever 39, coil spring 40
And the surrounding small members related to these constitute a prohibition means for prohibiting the movement of the disk holding part (tray 8 and container 14) with respect to the housing 2 when the disk holding part (tray 8 and container 14) is housed in the housing 2. There is. Further, the disk carrying portion, the cam members 18 and 19, the driving force applying means that applies a driving force to the cam member 19, the interlocking mechanism that interlocks both the cam members 18 and 19, and the inhibiting means , a disk conveying mechanism is constructed which carries the disk 13 to be played and moves the disk in the front-rear direction and up-down direction to convey it to the playing position.

As is clear in FIG. 2, a carriage 43 is disposed below the chassis 6, and carries an optical pickup means (not shown) for reading information from the disk 13, and extends in the front-rear direction. The housing 2 is slidably supported by a guide shaft 44 fixed to the housing 2. A rack portion 43a is provided at the right end of the carriage 43 and extends in the front-rear direction, which is the direction in which the carriage moves. The carriage 43 is driven by a drive mechanism including a gear 45 that meshes with the rack. Incidentally, an opening 6c is formed in the chassis 6 so as not to interfere with information reading by the pickup means. Further, the container 14 also has an opening 14b that has the same effect as the opening 6c.
(shown in Figure 7) is provided.

As shown in FIGS. 2 and 3, a spindle motor 49 is disposed in the direction of movement of the carriage 43 and rotates a turntable 48 that carries the disk 13 and rotates. However, the second
The turntable 48 is not shown in the figure. As shown in detail in FIG.
Reference numeral 8 denotes a substantially dish-shaped disk mounting part 48a fitted to the output shaft 49a of the spindle motor 49, a support part 48b fitted to the tip of the output shaft 49a, and a disk mounting part 48a and a support part 48b. A sliding portion 48c is provided between the output shaft 49a and slidably fitted to the output shaft 49a, and a coil spring 48d applies an upward bias force to the sliding portion 48c. Further, a taper is formed on the outer periphery of the upper end of the sliding portion 48c to engage with the center hole 13a of the disk 13 to center the disk 13.
The above-mentioned carriage 43 and guide shaft 44
, turntable 48 , and spindle motor 4
9 and peripheral small members related to these,
A performance means for performing disk performance is configured.

Next, a description will be given of a disk clamp mechanism that clamps the disk transported to the performance position.

As is clear from FIGS. 3, 5, 6, and 10, a support member 52 is provided within the chassis 6.
is located. The support member 52 extends parallel to the rotating surface of the turntable 48 and supports the chassis 6.
It is swingably supported by a pair of support shafts 53 fixedly attached to. A pressing member 54 that clamps the disk 13 placed on the turntable 48 in cooperation with the turntable is rotatably supported at the swinging end of the support member 52 . Here, the position of the support member 52 shown in FIG. 20 is referred to as the unclamped position of the support member. Further, the position where the support member 52 swings a predetermined amount clockwise from the unclamped position and the press member 54 presses the disk 13 on the turntable 48 is referred to as the clamp position of the support member. That is, the support member 52 swings between the clamp position and the non-clamp position.

To describe the support member 52 in more detail, it includes a pair of left and right arm portions 52a and 52b each swingably supported by the support shaft 53, and a substantially A bridge portion 5 rotatably supports the pressing member 54 in the central portion.
2c. For example, as shown in FIG. 6, among the arm portions 52a and 52b,
A coil spring 56 that receives a reaction force from the chassis 6 is connected to the left arm portion 52a, and is urged toward the clamp position by the coil spring.

As is particularly clear in FIG. 5, in front of the bridge portion 52c of the support member 52, a synchronization bar 58 is arranged as a synchronization means for synchronizing the swinging of the left and right arm portions 52a, 52b. The synchronization bar 58 extends substantially parallel to the bridge portion 52c,
Moreover, it is rotatably supported by the chassis 6. Both ends of the synchronization bar 58 are bent at right angles in substantially the same direction, and the synchronization bar as a whole has a U-shape. As shown in FIG. 6, both end arms or bent portions 58a and 58b of the synchronization bar 58
are smoothly engaged with engaging protrusions 59a and 59b provided on the outer surfaces of the swinging ends of both arms 52a and 52b, respectively. Of both engaging protrusions, the arm portion 52 is biased by the coil spring 56.
The engaging protrusion 59a provided at the bent portion 58a
The coil spring 56 is engaged with the coil spring 56 in a downward direction, that is, in the biasing direction of the coil spring 56. In addition, an engaging protrusion 59 provided on the other arm portion 52b
b engages with the bent portion 58b on the opposite side to the biasing direction. In addition, as shown in FIGS. 3, 5, and 10, the right arm portion 52
A tapered portion 52d that slopes downward toward the rear is formed at the swinging end portion b, and a pin 21d protruding from the moving member 21 is slidably engaged with the tapered portion. That is, the arm portion 52d, and thus the support member 52, swings as the moving member 21 moves back and forth.

The story will go back and forth, but the bearing section that supports the pressing member 54 will be explained.

As is particularly clear in FIG. 10, a spindle 62 is disposed at the center of rotation of the pressing member 54, and is inserted through an opening formed in the bridge portion 52c of the supporting member 52. Pressing member 54
is fixed to the lower end of this spindle 62. Further, the lower end portion of the spindle 62 can be fitted into a guide hole formed at the rotation center of the support portion 48b of the turntable 48. The spindle 62 is provided with a flange portion 62a to support the pressing member 54. Above the flange portion 62a, there are an inner race 63a, an outer race 63b, and a plurality of spherical bearing members 6 interposed between them.
A ball bearing 63 consisting of 3c is disposed and fitted onto the spindle 62.
Further, a receiving plate 64 made of a viscoelastic material such as rubber is attached to the lower surface of the bridge portion 52c so as to be able to come into contact with the outer race 63b. Together with the ball bearing 63, the bridge portion 52c and the receiving plate 64
A washer 65 made of resin or the like is located at a position sandwiching the two, and is fitted onto the spindle 62.
Further, an E-ring 66 serving as a retaining member is disposed at a position to sandwich the washer 65 together with the bridge portion 52c, and is fitted onto the upper end of the spindle 62.
When the disk is clamped, the outer race 63b and the receiving plate 64 are in contact with each other, and the washer 65 and the E-ring 66 are separated from each other. When the clamp is released, the outer race 63b and the receiving plate 64 are separated, and the washer 65
and the E-ring 66 are in contact with each other.

The spindle 62 and ball bearing 6 mentioned above
3. The receiving plate 64, the washer 65, and the E-ring 66 constitute a bearing portion of the pressing member 54. Further, the bearing portion, the support member 52, and the coil spring 56 constitute a support mechanism that rotatably supports the pressing member 54. Furthermore, the support mechanism, the pressing member 54, and the synchronization bar 5
The synchronizing means including the synchronizing means 8 and the peripheral small members related thereto constitute a part of the disk clamping mechanism.

As shown in FIG. 10, a detection switch 69 is disposed below the swinging end of the right arm portion 52b of the support member 52. As shown in FIG. This detection switch 69 serves as a detection means for detecting whether the disk has been correctly clamped, or whether it has been incorrectly clamped. It is arranged so as to come into contact with the protrusion 52e formed on the arm portion 52b only when it is in the above-mentioned clamp position. In addition, this detection switch 69
is included in the disk clamp mechanism described above.

As shown in FIG. 2, at the front and back of the right end of the chassis 6, there is a detection switch 70a for detecting the completion of the forward and backward movement of the moving member 21 by coming into contact with the moving member 21, that is, the operation of the container 8. and 70b are fixedly installed. Further, by contacting the front end of the chassis 6 with the prohibition plate 38, the movement of the prohibition plate to the left, that is,
A detection switch 71 is fixed for detecting that the disk carrier comprising the tray 8 and the container 14 is housed in the housing 2. Further, although not shown, a detection switch is provided to detect when the carriage 43 has reached its travel limit. Further, as shown in FIG. 2, in addition to the above-mentioned detection switches, a pair of photo sensors 72a and 72b are arranged for determining the diameter of the disk.

Detection signals emitted from the above-mentioned detection switches 69, 70a, 70b, and 71 and the detection switch that detects the movement limit of the carriage 43 are transmitted to a control unit (not shown) provided at a predetermined position within the housing 2. . The spindle motor 49, the motor 23, and a motor (not shown) for driving the carriage 43 are operated at timings described later by operation signals sent from the control section in response to each of these detection signals.

Next, the operation of the front-loading disk player having the above-mentioned structure will be briefly explained along with the playing procedure with reference to FIGS. 12 and 13.

First, the state shown in FIG. 2 is the initial state. As is clear from FIG. 2, the tray 8 is housed within the housing 2 in the initial state. Further, the moving member 21 is at the rear limit position,
The rear end of the moving member is in contact with the detection switch 70b. Eject lever 3 shown in Figure 4
The swinging end of 2 is urged by a coil spring 33 and abuts against the inner wall surface of the rear end of the chassis 6. Also, a locking pin 36 protruding from the tray 8
a and 36b (shown in the seventh figure) are fitted into the notch 38d of the prohibition plate 38, and the tray 8 is locked with respect to the housing 2. Note that the container 14 is located at the upper limit position, and the support member 52 of the disk clamp mechanism is located at the non-clamping position.

When the eject button of the operation button group 5 shown in FIG. (direction of arrow X). Therefore, the notch 38d of the prohibition plate 38 and the locking pin 36
a and 36b are released, and the tray 8 is unlocked from the housing 2. Therefore,
The tray 8 is pushed forward slightly by the action of the eject lever 32 and the coil spring 33. Thereafter, it is manually pulled out to tray 8.

As shown in FIG.
be carried. After carrying disk 13,
Push the tray 8 by hand and store it in the housing 2. As shown in FIG. 12a, as the tray 8 is housed in the housing 2, the locking pin 3
6a and 36b are tapered portions 3 of the prohibition plate 38
8c, the inhibition plate 38 is moved to the right (in the direction opposite to the arrow X) as shown in FIG. 12b. When the tray 8 is further pushed into the housing 2, the locking pins 36a and 36b are removed from the tapered portion 38c and engaged with the swinging end of the blocking lever 39. Therefore, the blocking lever 39 swings, as shown in FIG. 12c.
A protrusion 3 formed on the blocking lever as shown in FIG.
The contact state between the contact portion 9b and the predetermined contact portion 6b is released. Therefore, the prohibition plate 38 moves to the left,
The notch 38d of the prohibition plate and the locking pin 36
a and 36b are fitted, and the tray 8 is connected to the housing 2.
locked against. As the prohibition plate 38 moves to the left, the detection switch 71 is operated, so the motor 23 starts rotating and the moving member 21 starts moving forward. Moving member 21
When starts moving forward, first, Fig. 13a
As shown in FIG.
As shown in FIG. 13B, the connecting lever 27 is disengaged from the bent portion 27d of the connecting lever 27 and the locking recess 8a of the tray 8. As the moving member 21 moves further forward, the first
As shown in FIG. 3b, the pin 27c of the connecting lever 27 comes into contact with a portion of the engaging portion 21c that extends in the left-right direction. Therefore, the cam member 19 moves forward (in the direction of arrow Y) together with the moving member 21. Therefore, the cam member 18 is moved rearward via the rotary lever 30 shown in FIG. 4, for example, and the container 14 is lowered.
The disk 13 is placed on a turntable.

On the other hand, as is clear from FIG.
1, the pin 21d protruding from the movable member slides along the tapered portion 52d formed on the arm portion 52b, and therefore the support member 52
is lowered and the disk is clamped. Further, when the movement of the moving member 21 is completed and the front end of the moving member comes into contact with the detection switch 70b (see FIG. 2), the motor 23 stops.

Thereafter, by pressing the performance button of the operation button group 5, the drive mechanism of the carriage 43 and the spindle motor 49 start operating, and a performance is performed.

When the performance is finished and it is detected that the carriage 43 has reached its limit position, the spindle motor 4
9 and the carriage drive mechanism stops. After that, the motor 23 automatically starts rotating in reverse and moves the tray 8.
The projecting operation is performed to the outside of the housing. however,
When the tray 8 protrudes, the pin 27c of the connecting lever 27 is moved against the moving member 2, as shown in FIG. 13c.
1, and thereby the left and right cam members 18, 19 are moved. The disk is thus recovered.

Note that if the eject button is pressed during the performance, the same operation as above is performed and the disc is recovered. Also, when the disk is displaced in the radial direction on the turntable for some reason when clamping the disk, and the disk recording surface is caught between the turntable 48 and the pressing member 54 during clamping, a so-called misclamp occurs. , the support member 52 cannot be lowered to the clamp position. Therefore, the detection switch 69 may not be pressed by the arm portion 52b (see FIG. 10), and the detection switch 69 may not operate.
Therefore, we take advantage of the fact that the time from the start of the disk clamping operation, that is, the downward swinging of the support member 52 including the arm portion 52b, to the completion of the clamping, that is, the time until the detection switch 69 is activated, is almost constant. After the predetermined time has elapsed, the eject operation is automatically performed.

In this front loading disc player, when the tray 8 is housed in the housing 2, the connecting lever 27 that connects the cam member 19 and the moving member 21 can freely swing in parallel to the rotating surface of the turntable 48. The first
As shown in FIG. 4 and FIG. 15, it is also possible to adopt a type in which the turntable swings in a direction perpendicular to the rotating surface of the turntable.

As detailed above, the disc clamp mechanism according to the present invention is provided with a synchronization bar serving as a synchronization means for forcibly interlocking the pair of arms, so even if one arm comes into contact with the player housing, etc. Since both arm portions are reliably swung in synchronization, the entire support member is not distorted. Therefore, disk clamping can be done accurately.

Further, in the disk clamping mechanism according to the present invention, both end arm portions of the synchronizing member smoothly engage with the engaging protrusions provided on each free end portion of the pair of arm portions, and the driving force applying means The engaging protrusion provided on the arm portion to which a driving force is applied engages with the arm portion in the direction of driving by the driving force applying means, and the engaging protrusion is provided on the arm portion to which no driving force is applied by the driving force applying means. The engaging protrusion is configured to engage with the arm portion on the opposite side to the driving direction. By employing such an engagement method, the engagement protrusions are always abutted and engaged with both arms. Therefore, no special means is required for engaging the engaging protrusion and the arm, resulting in a simple structure and reduced cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing the entire front loading disc player according to the present invention, and FIGS. 2 and 3 are a plan view and a front view, respectively, including a partial cross section of the internal structure of the front loading disc player. , FIG. 4 is a plan view including a partial cross section of the tray and its peripheral members, FIGS. 5 to 8 are partial perspective views of the internal structure, FIGS. 9 a, b, and 10.
Figures 1 and 11 are partially detailed views of the internal structure.
2a to 2c and 13a to 13c are diagrams for explaining the operation of the internal structure, and FIGS. 14 and 15 are diagrams showing a partial modification of the internal structure. Explanation of symbols of main parts, 2...Housing, 3
...Front panel, 3a, 6c, 14b, 15
. . . Opening, 5 . . . Operation button group, 6 . . . Chassis, 6a, 21d, 27c . , 8a...Locking recess, 10a,
10b... Guide rail, 11... Movable panel,
13...disk, 14...container, 14a...
...Engagement pin, 15a...Claw portion, 15b, 38c,
52db... Taper part, 18, 19... Cam member,
18a, 19a...Cam hole, 20...Support plate, 21...Moving member, 21a...Rack part, 2
1b, 21c, 38a... engaging portion, 22, 45...
...Gear, 23...Motor, 23a, 29...Bracket, 24a...Belt, 24b...Pulley,
24c... Worm, 24d... Worm wheel, 27... Connection lever, 27a, 32b, 39
a...Axis, 27b, 33, 38b, 40, 48
b, 56...Coil spring, 27d, 58
a, 58b...Bending portion, 29a, 53...Supporting portion, 30...Rotating lever, 32...Eject lever, 32a...Screw, 35a, 35b...Plate, 36a, 36b...Locking pin , 38... Prohibition plate, 38d... Notch, 39... Preventing lever, 39b... Protrusion, 43... Carriage, 4
3a... Rack part, 44... Guide shaft, 4
8...Turntable, 48a...Disk placement part, 48b...Support part, 48c...Sliding part, 49
... Spindle motor, 49a ... Output shaft, 52
...Supporting member, 52a, 52b...Arm portion, 5
2c...Bridge part, 52e...Protrusion, 54...
Pressing member, 58...Synchronization lever, 59a, 59b
...Engaging protrusion, 62...Spindle, 62a...
Flange part, 63...Ball bearing, 63a
...Inner lace, 63b...Outer lace, 6
3c... Spherical bearing member, 64... Reception plate, 6
5...Watushia, 66...E ring, 69,7
0, 70b, 71...detection switch, 72a, 7
2b...Photo sensor.

Claims (1)

[Claims for Utility Model Registration] (1) A pressing member 54 that clamps the disk 13 placed on the disk supporting surface of the turntable 48 toward the disk supporting surface, and A support member consisting of a pair of arm parts 52a and 52b that are swingably provided between a clamp position and a bridge part 52c that is installed between the free ends of each of the arm parts and rotatably supports the pressing member. and driving force applying means 21, 21d, 22, 24a, 2 for applying driving force to the support member.
4b, 24c, 24, and 56, the arm is rotatably supported around a rotation axis substantially parallel to the bridge part and engages with each free end of the pair of arm parts. A disk clamping mechanism comprising a synchronizing member 58 having portions 58a and 58b. (2) The arm portions 58a and 58b at both ends of the synchronizing member smoothly engage with the engaging protrusions 59a and 59b provided on the free ends of the pair of arm portions, respectively, and the driving force applying means A driving force is applied to one of the pair of arm parts to cause it to swing, and the engaging protrusion provided on the arm part which is caused to sing by the driving force applying means causes the arm part to swing. The engaging protrusion provided on the arm portion that is engaged on the driving direction side by the force applying means and to which the driving force is not applied by the driving force applying means is engaged with the arm portion on the opposite side to the driving direction. A disk clamping mechanism according to claim 1 of the utility model registration claim, characterized in that: