JPH02220261A - Disk player - Google Patents

Abstract

PURPOSE:To facilitate the insertion of a disk even when the disk player is severely vibrated by providing a centering mechanism consisting of one pair of centering arms and a centering lever in the middle of a disk inserting hole. CONSTITUTION:When a small diameter disk 106 is biasedly inserted into the disk inserting hole, the disk is guided into the middle of the disk inserting hole by one pair of centering pins 18 and 19 of the centering mechanism 12. Then, when a disk of 12cm in diameter is inserted and brought into contact with the centering pins 18 and 19 at the same time, the centering lever 15 is moved to the side of the disk inserting hole, and consequently the centering arms 13 and 14 are turned around supporting pins 16 and 17 respectively, and then the centering pins 18 and 19 are spread out until the disk diameter so that the disk is smoothly inserted. By this constitution, even when a disk is inserted to the disk inserting hole of the disk player on vehicle under severe vibration during driving a car, the disk smoothly is guided into the middle of the disk inserting hole.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a disc player having a centering mechanism that positions the disc at the center of the disc insertion slot when the disc is inserted into the disc insertion slot of a disc player. Regarding disc players.

[Conventional technology]

In recent years, disc-shaped compact discs (hereinafter simply referred to as discs) have been developed in which analog sound is converted into digital signals and pits corresponding to the digital signals are formed in the recording layer. This disc optically reproduces analog sound using a laser beam irradiated from a read head of a CD player. Furthermore, since this disc provided dramatically superior sound quality and operability compared to conventional LP records, it rapidly became popular along with CD players. Therefore, CD players especially for use in vehicles have been developed, and examples of such in-vehicle CD players include the one shown in FIG. 9. In the same figure, the reference numeral 101 indicates a diameter of 12c.
It is a disc-shaped disc with a diameter of 1.5 m, on which music is recorded. When this disc 101 is inserted into the disc insertion slot 102, the loading mechanism 103 moves it to a predetermined position (CD
(approximately the center position of the player), and is fixed on the turntable 105 by the clamper arm 104 at this predetermined position. Disc 10 on turntable 105
1 is rotated by a spindle motor (not shown),
Music recorded on the disc 101 is being played back by a read head (not shown).

By the way, it corresponds to a conventional single record and has a diameter of 12
Diameter 8, which is much smaller than the disk 101 of c1n.
cm disk 106 is being developed.

[Problem to be solved by the invention]

However, in such a conventional CD player, the disc insertion slot 102 is formed to fit a disc 101 with a diameter of 120+11, so if you try to insert a particularly small-diameter disc 106 into the disc insertion slot 102, Since the opening of the disk insertion slot 102 is wide, it is difficult to insert the disk into the center. Therefore, if the disk 106 is inserted not in the center of the disk insertion slot 102 but biased, the disk 106 is then transported by the 0-ding mechanism 103, but because it is inserted biased, it is not transported to the predetermined position. It disappears. especially,
In a car-mounted CD player, a small-diameter disc 106 is inserted into the disc insertion slot 102 to avoid vibrations while the vehicle is running.
It is more difficult to insert it in the center of the

In view of the above, the present invention makes it possible to easily insert the small-diameter disk 106 into the center of the disk insertion slot 102, even if the in-vehicle disk player vibrates violently, for example while the vehicle is running. Even a large-diameter disk 101 with a diameter of 12 cm can be easily inserted into the disk insertion slot 102. do.

[Means to solve the problem]

Therefore, in the present invention, a disc is inserted through the disc insertion slot, and when the disc reaches a predetermined position in the player, the clamper arm is operated to fix the disc on the turntable, and the turntable is rotated to record. In the disc player for playback, the disc player has a centering mechanism that is provided in the disc insertion slot and guides the inserted disc to the center of the disc insertion slot, and the centering mechanism is provided in the disc insertion slot. two centering arms that are swingably provided at intervals, each having abutting portions that face the disc insertion slot at intervals and that come into contact with the periphery of the disc; The peripheral edges of the disks to be connected and inserted simultaneously contact the abutting portions of the two centering arms, allowing their rocking movement when attempting to swing them in the direction of opening them to each other, and the disks being inserted. When the peripheral edge of the disk contacts only the contact portion of one centering arm, the centering lever operates to lock the swinging of that centering arm.

[Effect]

For example, since an in-vehicle disc player is installed on the front panel of a vehicle, the in-vehicle disc player also vibrates while the vehicle is running. Therefore, when inserting a particularly small-diameter disk into the disk insertion slot, it is necessary to pay particular attention to positioning it in the center of the disk insertion slot.

However, since a centering mechanism is provided near the disc insertion slot, the disc can be easily positioned at the center of the disc insertion slot without being biased.

In addition, the centering mechanism is connected to a pair of centering arms that are swingably supported and have abutting portions that come into contact with the inserted disk, and are spaced apart from each other with respect to the disk insertion slot. When the disks inserted at the same time abut the abutting portions of the pair of centering arms, the centering arms are swung to open, and when the disks abut the abutting portions of one of the centering arms, the centering Since it is constructed with a centering lever that locks the swinging of the arm, the number of parts can be reduced and the inserted disk can be reliably guided to the center position of the disk insertion slot.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. 1 to 8 are diagrams showing an embodiment of a CD player according to the present invention.

First, the configuration will be explained.

In FIG. 1, reference numeral 1 indicates an in-vehicle C to which the present invention is applied.
This is a casing for a D player, and the front surface of this casing 1 is provided with a disc insertion slot 2 for inserting a disc. A frame 3 is housed within the casing 1, and the frame 3 has a substantially flat top plate 3a and side plates 3b, 3b whose sides are bent downward. Furthermore, a support frame 4 as shown in FIG. 2 is disposed inside the frame 3, and a playback device (not shown) for playing back music recorded on the disc is mounted on this support frame 4. It is installed in Nakao. The support frame 4 is floatingly supported by the frame 3 via dampers 5, 5, . . . 5 in a cushioning manner.

Further, the disk 106 inserted into the disk insertion slot 2 is placed at a predetermined position (support frame 4) on the front side of the frame 3.
A loading mechanism 6 and a loading arm lowering mechanism 7 are connected to the loading arm 8.
It is provided through. The loading mechanism 6 has a drive roller 9a attached to the support frame 4. The loading mechanism 6, the loading arm lowering machine tM7, and the locking mechanism 45 to be described later are described in detail in previously filed Utility Model Application No. 136632/1983. Further, a loading motor 10 is provided on the front side of the frame 3, and when a drive roller 9a is rotated by the drive of the loading motor 10, it cooperates with a driven roller 9b disposed opposite to this drive roller 9a to rotate the disc. The disk 106 inserted into the insertion slot 2 is transported to a predetermined position.

Also, on the inner side of the frame 3 and near the disc insertion slot 2, a centering mechanism 1 is provided for positioning the disc 106 at the center of the disc insertion slot 2, as shown in FIG.
2 are arranged. As shown in FIG. 3, the centering mechanism 12 includes a pair of centering arms 13 and 14,
It consists of a centering lever 15 located between these centering arms 13 and 14. The pair of centering arms 13 and 14 have an abbreviated shape as a whole, and have tip portions 13a and 14a that come into contact with the inserted compact disc 106, respectively, and side edge portions 13b and 14b. .

14a and the side end portions 13b, 14b, a central portion 13c;
It is pivotally supported on the frame 3 via support pins 16 and 17 provided at 14c. The tip portions 13a, 14a extend to the vicinity of the disk insertion slot 2.
Centering pins 18 and 19 are attached to H as contact members that contact the peripheral edge of the disk. The centering pins 18, 19 may be formed integrally with the tips 13a, 14a, and therefore the centering pins 18 and 19 can also be considered as the tips 13a, 14a. The side ends 13b, 14b face each other and are each fitted with a connecting pin 20.21.

The centering lever 15 has a generally inverted W-shape as a whole, and connecting grooves 22.23 are formed at both ends of the centering lever 15. By fitting the connecting pins 20.21 into the connecting grooves 22.23, a pair of connecting grooves 22.23 are formed. The centering arms 13, 14 and the left and right ends of the centering lever 15 are connected. A long hole 25 is formed in the center of the centering lever 15 along the disk insertion direction, and the long hole 25 has a circular head 25a on the disk insertion opening 2 side, as shown in FIG. A guide pin 26 embedded in the frame 3 is inserted into the elongated hole 25.
is inserted loosely, and this guide pin 26 is relatively movable within the elongated hole 25. Further, a guide groove 125 is provided on the player center side of the centering lever 15, and a guide pin 126 fixed to the frame top plate 3a is engaged with this guide groove 125. Further, the protruding portion in which the guide groove 125 is formed is guided between a pair of guide text portions 3c and 3d provided on the frame 3. Therefore, the centering lever 15 can reciprocate in the disk insertion direction.

A tension spring 27.28 is stretched between the pair of centering arms 13, 14 and the projections 3b, 3b of the frame 3, and the biasing force of this tension spring 27.28 causes the pair of centering pins 18, 19 to be moved. are brought closer to each other.

The distance between the pair of centering pins 18 and 19 is approximately 8 marks, and if a small-diameter disk is not inserted in the center of the disk insertion slot 2 but is inserted unevenly, this disk will be inserted between the pair of centering pins 18 and 19. come into contact with either. When the disk 106 comes into contact with the centering pin 18 as shown in FIG. 3, the centering arm 13 rotates slightly counterclockwise about the support pin 16 against the biasing force of the tension spring 27. .

This rotation of the centering arm 13 causes the centering lever 15 as a whole to rotate slightly clockwise.

When the centering lever 15 rotates in the forward and backward directions in this manner, the guide pin 26 is slightly deviated from the center of the circular head 25a of the elongated hole 25, as shown in FIG. comes into contact with. In this case, the guide pin 26 cannot move relatively within the elongated hole 25.
That is, the centering lever 15 is aligned with the disk insertion slot 2.
Unable to move to the side. Therefore, although the centering arm 13 is rotated a little by the disk 106, it does not rotate any further.

Therefore, the disc 106 inserted unevenly is regulated by the centering pin 18 and guided to the center of the disc insertion slot 2.

Next, when the disk 101 is guided into the disk insertion slot 2, this disk 101 is inserted into the pair of centering pins 1.
8 and 19 at the same time. Then, the pair of centering arms 13.14 rotate in opposite directions about the support pin 16.17, and the guide pin 26 does not deviate from the center of the circular head 25a of the elongated hole 25. It becomes relatively movable within the hole 25, and the centering lever 15 moves toward the disk insertion slot 2 side.

Therefore, the disc 101 can be inserted into this in-vehicle CD player.

On the other hand, as shown in FIG. 2, a turntable 29 on which the disk 106 is placed is provided approximately at the center of the support frame 4, and this turntable 29 is connected to a spindle motor 30 provided on the lower surface side of the support frame 4. rotated by A small disk-shaped clamper 31 is located above the turntable 29, and this clamper 31 is attached to a clamper arm 3 that is swingably attached to the rear of the support frame 4.
It is provided at the triangular tip of 2. Clamper arm 3
A tension spring 33 is stretched between the clamper arm 2 and the support frame 4, and the clamper arm 32 is connected to the turntable 2.
It is pushing towards 9.

5 and 6 are also provided on the lower surface of the clamper arm 32.
As shown in the figure, an auxiliary actuation plate 34 is attached, and this auxiliary actuation plate 34 has a small diameter 8cn+ disk 106.
When the disc 106 is transported and positioned on the turntable 29, the detection pin 41 is operated to place the disc 106 on the turntable 29. This operation auxiliary plate 34 is located at pivot points 130, 130 on both sides of the front end of the clamper arm 32.
It is swingably mounted at the bottom and is biased downward by a leaf spring 40. On the lower surface side of the actuation auxiliary plate 34, in the center thereof, there is formed a generally arcuate disk recess 35 that fits a disk having a diameter of 8c+n. Therefore, when the small-diameter disk 106 is conveyed toward a predetermined position, this disk 106 enters the disk recess 35. A hole 36 is formed at the rear end of the disc recess 35, and a central portion of a suppression auxiliary mechanism 37 provided on the upper surface side of the actuation auxiliary plate 34 faces the hole 36.
Therefore, the tip of the disk 106 that has entered the disk recess 35 comes into contact with the pressing assisting mechanism 37 through the hole 36, thereby causing it to act.

Here, when a disk 101 with a diameter of 12 is conveyed onto the turntable 29, since the disk 101 has a large diameter, it does not enter the disk recess 35 of the actuation auxiliary plate 34, but climbs over it and is conveyed as it is. The sensor is placed on the turntable 29 after its periphery directly contacts the detection pin 41 without activating the press assisting mechanism 37.

The pressing auxiliary mechanism 37 has a pair of swinging arms 38 and 39, and base end portions of the pair of swinging arms 38 and 39 are pivotally mounted on the operation auxiliary plate 34. A tension spring 40 is stretched between the pair of swinging arms 38 and 39, and the tip portion 38a,
39a are fitted in a mutually gripping manner as shown in FIG. Therefore, the small diameter disk 106 is inserted through the hole 36.
When the tips 38a, 39a are pushed by the tips of the two, the pair of swinging arms 38, 39 open like doors and swing, respectively. A protruding piece 38b is integrally formed on the swinging arm 38, and a detection pin 41 is disposed at a position facing the protruding piece 38b, and as the swinging arm 38 swings, the protruding piece 38b presses the detection pin 41. do.

As shown in FIG. 8, the detection pin 41 is attached to one end of a first link 42 that is pivotally installed on the rear end side of the frame 3, and the other end of the first link 42 slides in the direction of disk insertion. It is connected to a second link 43 which is arranged so that it can be connected. When the detection pin 41 is pressed by the swing arm 38 in the case of a small-diameter disk 106 or directly by each disk in the case of a large-diameter disk 101, the second link 43 is slid and the loading arm mechanism 7 is locked. Release the current state and make it operational.

On the other hand, as shown in FIGS. 1 and 2, the support frame 4
A lock pin 44 is implanted at the side end of the frame 3 and protrudes to the side of the frame 3. A lock mechanism 45 is provided on the frame 3 from which the lock pin 44 protrudes, and the lock pin 44 is locked by the lock mechanism 45 until the inserted disk is transported to a predetermined position, and the support frame 4 is fixed to the frame 3. ing. Loading arm actuation mechanism 7
The loading arm 8 is moved downward by the operation of the locking mechanism 45, and the locking mechanism 45 is moved downward by the opening of the locking pin 44.
The shift state is released, and the support frame 4 is supported by the frame 3 via the damper 5 in a cushioning manner.

In addition, a movable lid 4 is provided on the frame 3 near the disc insertion slot 2.
6 is attached so that it can be opened and closed freely, and when this in-vehicle CD player is in use, a movable cover 46 moves to the disc insertion slot 2 to prevent accidentally inserting another disc into the disc insertion slot 2. ing.

Next, the effect will be explained.

The centering mechanism 12 of the present invention is particularly suitable for a small diameter disk 1.
Since it is effective when using 06, the small diameter disk 1
This will be explained using 06 as an example.

When a small-diameter disk 106 is inserted into the disk insertion slot 2, a sensor 47 provided at the front of the top plate 3a detects the insertion of the disk 106, and the loading motor 10 is driven. Here, when the small-diameter disk 106 is inserted, if it is inserted not in the center of the disk insertion slot 2 but off-centered, it will come into contact with one of the pair of centering pins 18 and 19 of the centering mechanism 12. When the disk 106 comes into contact with either of the pair of centering pins 18 and 19, the centering mechanism 12 guides the disk 106 to the center of the disk insertion slot 2 as described above.

Next, the driving roller 9a is rotated by the driving of the loading motor 10, and the inserted disk 106 is conveyed toward the turntable 29 in cooperation with the driven roller 9b. When the disk 106 is conveyed to the vicinity of the center of the turntable 29, since the disk 106 has a diameter of 8 marks, it enters the disk recess 35 of the actuation auxiliary plate 34.

When the disk 106 enters the disk recess 35, the tip of the disk 106 is inserted into the hole 36 as shown in FIG.
The detection pin 41 is
Press. That is, as described above, the disk 106
The swinging arm 38 swings, and the protruding piece 38b presses the detection pin 41.

When the detection pin 41 is pressed, the first
The link 42 swings about the pin 142, slides the second link 43, and operates the loading arm mechanism 7, and as shown in FIG. pin 1 with 8
50 is lowered by the biasing force of the tension spring, and the disk 106 placed on the turntable 29 is pressed and fixed by the clamper 31.

The disk 106 is fixed by the clamper 31, and in conjunction with the operation of the loading arm mechanism 7, the locking mechanism 4
5 releases the locked state of the lock pin 44, and the support frame 4 is bufferedly supported by the frame 3 via the damper 5, and becomes a floating state. In this way, preparation for the playback operation is completed, and the spindle motor 30 is driven to rotate the disk 106 via the two turntables.

When the disc 106 is rotated, a reading head (not shown) emits laser light, and the reading head moves in the radial direction of the disc 106, thereby reproducing the music recorded on the disc 106.

By the way, it is difficult to insert the small-diameter disc 106 so that it is located in the center of the disc insertion slot 102 while the vehicle is running, and the user has to be careful, which may impede safety while the vehicle is running. be. However, since the centering mechanism 12 is disposed near the disc insertion slot 2, the centering pins 18 and 19 guide the disc 106 to the center of the disc insertion slot 2 even if it is inserted unevenly.

Next, if a disc 101 with a diameter of 12 countries is inserted into the disc insertion slot 2, this disc 101 has a diameter that is approximately the same as the opening of the disc insertion slot 2, so this disc 101 is relatively centered in the disc insertion slot 2. Easy to locate. disk 10
1 abuts the pair of centering pins 18, 19 simultaneously, the centering arms 13, 14 are moved against the support pins 16, 14.
17, and the pair of centering pins 18 and 19 widen to a diameter of 12 cm. For this reason, a disk 10 with a diameter of 12 marks is used.
1 is the centering pin 18, 1 of the centering mechanism 12
9, the CD player can be inserted smoothly into this vehicle-mounted CD player.

The driving roller 9a is driven by the loading motor 10.
is rotated to convey the inserted disk 101 toward a predetermined position in cooperation with the driven roller 9b. When the disk 101 is transported close to a predetermined position, this disk 1
01 has a diameter of 12 cm, so it does not fit into the disc recess 35 of the operation auxiliary plate 34.
conveyed along the underside of the When the disk 101 is conveyed along the lower surface of the actuation auxiliary plate 34, the suppression auxiliary groove 37
The detection pin 41 is directly pressed without going through the. Thereafter, the operation is similar to that of the disk 106 with a diameter of 8 cm, and when the disk 101 is rotated, a laser beam is irradiated from the optical head to reproduce the recorded music.

In addition, since the centering mechanism 12 is composed of parts such as a pair of centering arms 13, 14, a centering lever 15, and a guide pin 26, the number of parts is small, which eliminates problems in terms of economy and durability. There isn't.

〔Effect of the invention〕

As explained above, according to the present invention, since the centering mechanism is provided to position the disc in the center of the disc insertion slot, even if a disc with a diameter of 8 cm is inserted unevenly into the disc insertion slot, it will be regulated by the centering pin. and guided to the center of the disc insertion slot. Therefore, the disc is securely placed and fixed on the turntable, and music can be played back by the reading head.

In addition, since the centering mechanism is composed of a pair of centering arms and a centering lever that reciprocates when the pair of centering arms swing substantially simultaneously, even if a small-diameter or large-diameter disk is inserted into the disk insertion slot, the The disc can be guided smoothly into the center of the insertion slot.

Furthermore, since the centering mechanism requires a small number of parts, there is no problem in terms of economy and durability.

29... Turntable, 32... Clamper arm, 101.106... Disc (
compact disc).

Claims (1)

[Claims] A disc in which a disc is inserted through the disc insertion slot, and when the disc reaches a predetermined position in the player, a clamper arm is operated to fix the disc on the turntable, rotate the turntable, and play back the recorded information. In the player, the disc player has a centering mechanism provided in the disc insertion slot for guiding the inserted disc to the center of the disc insertion slot, and this centering mechanism swings at intervals in the disc insertion slot. two centering arms each having abutting portions facing the disk insertion slot at intervals and abutting against the circumferential edge of the disk; The peripheral edge simultaneously contacts the abutting portions of the two centering arms, and when an attempt is made to swing them in the direction of opening them to each other, the rocking movement is enabled, and the peripheral edge of the inserted disk touches the contact parts of one of the centering arms. A centering lever that operates to lock the swinging of the centering arm when the centering lever contacts only the contact portion of the disk player.