JPH0690847B2 - Disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] In the present invention, when a disc is inserted into the disc insertion opening of a disc player, a centering mechanism for arranging the disc at the center of the disc insertion opening is provided. Disc player

[Conventional technology]

In recent years, a disc-shaped compact disc (hereinafter simply referred to as a disc) in which an analog sound is converted into a digital signal and pits corresponding to the digital signal are formed in a recording layer has been developed. This disc optically reproduces an analog sound by laser light emitted from a reading head of a CD player. In addition, this disc has achieved dramatically superior sound quality and operability compared to conventional LP records, so it has become rapidly popular with CD players. Therefore, in-vehicle CD players have also been developed from time to time.
As a player, there is a player as shown in FIG. 9, for example. In the figure, reference numeral 101 is a disc-shaped disc having a diameter of 12 cm, on which music is recorded. This disc 10
When 1 is inserted into the disc insertion slot 102, the loading mechanism
It is conveyed to a predetermined position (approximately the center position of the CD player) by 103, and is fixed on the turntable 105 by the clamper arm 104 at this predetermined position. Turntable 105
The upper disc 101 is rotated by a spindle motor (not shown), and the music recorded on the disc 101 is reproduced by a read head (not shown).

By the way, it is equivalent to a conventional single record and has a diameter of 12 cm.
A disc 106 having a diameter of 8 cm, which is much smaller than the disc 101 of the present invention, has been developed.

[Problems to be Solved by the Invention]

However, in such a conventional CD player, the disc insertion opening 102 is formed so as to fit the disc 101 having a diameter of 12 cm.
When the disc is inserted into the disc insertion opening 102, it is difficult to insert the disc into the center because the opening of the disc insertion opening 102 is wide. Therefore, if the disc 106 is biasedly inserted instead of in the center of the disc insertion opening 102, the disc 106 is subsequently transported by the loading mechanism 103, but cannot be transported to a predetermined position because it is biasedly inserted. Particularly in a vehicle-mounted CD player, it is more difficult to insert the small-diameter disc 106 into the center of the disc insertion opening 102 because it vibrates while the vehicle is traveling.

In view of such a point, the present invention allows the small-diameter disc 106 to be particularly easily inserted into the center of the disc insertion opening 102 even when the vehicle-mounted disc player vibrates violently while the vehicle is traveling, and is normally used. Large diameter disc with a diameter of 12 cm
It is an object of the present invention to provide a disc player in which a centering mechanism having a simple mechanism can be easily inserted into the disc insertion opening 102 as well.

[Means for Solving the Problems]

According to the present invention, a disc is inserted from the disc insertion opening, the centering mechanism guides the disc to the center of the disc insertion opening, and when the disc reaches a predetermined position of the player, the clamper arm is operated to turn the turntable. In a disc player in which the disc is fixed on the disc and the turntable is rotated to reproduce the recording in the disc, the centering mechanism is swingably provided at an interval at the disc insertion opening. A pair of centering arms, each of which has a contact portion with which the peripheral edge of the disc abuts, is formed in the disc insertion opening with a space therebetween, and is connected to the pair of centering arms. The centering lever that can move with respect to A guide part for guiding the movement of the lever is provided, and the guide part is provided with one protrusion member and a long hole through which the protrusion member penetrates and a circular head is formed on one end side. And

[Action]

For example, since the vehicle-mounted disc player is provided on the front panel of the vehicle or the like, the vehicle-mounted disc player also vibrates while the vehicle is traveling. Therefore, in particular, in order to insert a disc having a small diameter into the disc insertion opening, it is necessary to pay attention to positioning the disc at the center of the disc insertion opening. However, since the centering mechanism is provided near the disc insertion opening, the disc can be easily positioned in the center of the disc insertion opening without being biased.

In addition, the centering mechanism is connected to a pair of centering arms, each of which has an abutting portion that is swingably supported and abuts against the inserted disk, and is provided at a distance from the disk insertion opening. When the discs inserted at substantially the same time come into contact with the contact portions of the pair of centering arms, the centering arms are swung so as to open, and when they come into contact with the contact portions of one of the centering arms, the centering is performed. Since it is configured with the centering lever that locks the swing of the arm, the number of parts can be reduced and the insertion disc can be reliably guided to the center position of the disc insertion opening.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 are views showing an embodiment of a CD player according to the present invention.

First, the configuration will be described.

In FIG. 1, reference numeral 1 is a vehicle-mounted CD to which the present invention is applied.
This is a casing of a player, and a disc insertion opening 2 for inserting a disc is provided on the front surface of the casing 1. A frame 3 is housed in the casing 1. The frame 3 has a substantially flat top plate 3a and side plates 3b and 3b whose side portions are bent downward. further,
A support frame 4 as shown in FIG. 2 is disposed inside the frame 3, and a playback device (not shown) for playing music recorded on the disc is provided in the center of the support frame 4. It is installed. Support frame 4 is damper 5,5
... is supported by the frame 3 in a floating manner via 5 as a buffer. A loading mechanism 6 and a loading arm lowering mechanism 7 for transporting the disc 106 inserted in the disc insertion opening 2 to a predetermined position (substantially the central position of the support frame 4) are provided on the front side of the frame 3. It is provided through 8. The loading mechanism 6 has a drive roller 9a attached to the support frame 4. The loading mechanism 6, the loading arm lowering mechanism 7, and the lock mechanism 45 described later are described in detail in Japanese Patent Application No. 62-136632 filed earlier. Further, a loading motor 10 is provided on the front side of the frame 3, and when the driving roller 9a is rotated by the driving of the loading motor 10, it cooperates with a driven roller 9b arranged so as to face the driving roller 9a, so that the disc The disc 106 inserted in the insertion slot 2 is conveyed to a predetermined position.

Further, a centering mechanism 12 for positioning the disc 106 at the center of the disc insertion opening 2 is provided near the disc insertion opening 2 on the inner side of the frame 3, as shown in FIG. As shown in FIG. 3, the centering mechanism 12 includes a pair of centering arms 13 and 14, and a centering lever 1 located between the centering arms 13 and 14.
It consists of 5. The pair of centering arms 13 and 14 are substantially L-shaped as a whole, and the tip portions 13a and 14a and the side end portions which come into contact with the compact disc 106 to be inserted are respectively provided.
13b, 14b, and the tip 13a, 14a and the side end 13b, 14b
Is pivotally supported on the frame 3 via support pins 16 and 17 provided in central portions 13c and 14c between and. The tip portions 13a, 14a are extended to the vicinity of the disc insertion opening 2, and the tip portions 13a, 14a are
Centering pins 18 and 19 are attached to the disk as contact members that contact the peripheral edge of the disk. The centering pins 18 and 19 may be integrally formed with the tips 13a and 14a, and thus the centering pins 18 and 19 can be regarded as the tips 13a and 14a. The side end portions 13b and 14b face each other, and the connecting pins 20 and 21 are attached thereto, respectively.

The centering lever 15 has a substantially inverted W shape as a whole, and connecting grooves 22 and 23 are formed at both ends thereof. By connecting the connecting pins 20 and 21 to the connecting grooves 22 and 23, a pair of The centering arms 13 and 14 are connected to the left and right ends of the centering lever 15. An elongated hole 25 is formed in the center of the centering lever 15 along the disc insertion direction. The elongated hole 25 has a circular head 25a on the disc insertion port 2 side as shown in FIG. A guide pin 26 implanted in the frame 3 is loosely inserted in the long hole 25, and the guide pin 26 is a long hole.
It is possible to move relatively within 25. In addition, a guide groove 125 is provided on the player center side of the centering lever 15,
A guide pin 126 fixed to the frame top plate 3a is engaged with the guide groove 125. Further, the projecting portion in which the guide groove 125 is formed is guided between the pair of guide projecting surface portions 3c and 3d provided on the frame 3. Therefore, the centering lever 15 can reciprocate in the disc insertion direction.

A pair of centering arms 13 and 14 and a protrusion 3b on the frame 3;
Tension springs 27 and 28 are stretched between 3b,
The pair of centering pins 18 and 19 are brought close to each other by the biasing force of the tension springs 27 and 28. The distance between the pair of centering pins 18 and 19 is approximately 8 cm,
If a small-diameter disk is not inserted in the center of the disk insertion opening 2 but is biasedly inserted, the disk abuts either of the pair of centering pins 18 and 19. Disc 1
When 06 abuts on the centering pin 18 as shown in FIG. 3, the centering arm 13 slightly rotates counterclockwise about the support pin 16 against the urging force of the tension spring 27. By this rotation of the centering arm 13, the centering lever 15 as a whole rotates slightly clockwise. When the centering lever 15 is rotated clockwise in this way, the guide pin 26 is provided with an elongated hole as shown in FIG.
The circular head 25a of 25 is slightly displaced from its center and abuts on the lower left wall of the circular head 25a in the figure. Then, the guide pin 26 cannot relatively move within the elongated hole 25, that is, the centering lever 15 cannot move toward the disc insertion opening 2 side. Therefore, the centering arm 13 is slightly rotated by the disc 106, but is not rotated any further. Therefore, the disc 106 that is biasedly inserted is regulated by the centering pin 18 and guided to the center of the disc insertion opening 2.

Next, when the disc 101 is guided to the disc insertion slot 2, the disc 101 simultaneously contacts the pair of centering pins 18 and 19. Then, the pair of centering arms 13 and 14 rotate in opposite directions about the support pins 16 and 17, the guide pin 26 does not shift from the center of the circular head 25a of the elongated hole 25, and the guide pin 26 is long. It becomes possible to move relatively within the hole 25, and the centering lever 15 moves the disc insertion opening 2
Move to the side. Therefore, the disk 101 is
It can be inserted into the D player.

On the other hand, as shown in FIG. 2, a turntable 29 on which the disc 106 is placed is provided at substantially the center of the support frame 4, and this turntable 29 is driven by a spindle motor 30 provided on the lower surface side of the support frame 4. Is rotated. A small disk-shaped clamper 31 is located above the turntable 29, and the clamper 31 is provided on a triangular protruding end of a clamper arm 32 that is swingably attached to the rear portion of the support frame 4. A tension spring 33 is stretched between the clamper arm 32 and the support frame 4, and urges the clamper arm 32 toward the turntable 29.

Further, as shown in FIGS. 5 and 6, an operation auxiliary plate 34 is attached to the lower surface of the clamper arm 32, and the operation auxiliary plate 34 carries a disc 106 having a small diameter of 8 cm and is placed on the turntable 29. The detection pin 41 is operated when the disk 106 is positioned at, and the disk 106 is placed on the turntable 29. This operation auxiliary plate 34 is swingably attached at pivot points 130, 130 on both sides of the front end of the clamper arm 32,
It is biased downward by the leaf spring 140. Actuation auxiliary plate 34
On the lower surface side and in the central portion thereof, there is formed a substantially arc-shaped disc recess 35 which fits a disc having a diameter of 8 cm. Therefore, when the small-diameter disc 106 is conveyed toward a predetermined position, the disc 106 is depressed by the disc recess 35.
Get in A hole 36 is formed at the rear end of the disc recess 35, and the center portion of the pressing assist mechanism 37 provided on the upper surface side of the operation assisting plate 34 faces the hole 36. The tip of the disk 106 that has entered 35 is a hole 36
It comes into contact with the pressing assist mechanism 37 through and acts on it.

Here, when the disc 101 having a diameter of 12 cm is conveyed onto the turntable 29, the disc 101 has a large diameter, so that the disc 101 does not enter the disc recess 35 of the operation assisting plate 34, and the disc 101 is conveyed over as it is. The pressing assist mechanism 37 is placed on the turntable 29 after directly contacting the detection pin 41 with its peripheral edge without acting.

The pressing assist mechanism 37 has a pair of swing arms 38 and 39, and the base ends of the pair of swing arms 38 and 39 are pivotally mounted on the operation assisting plate 34. A tension spring 4 is provided between the pair of swing arms 38, 39.
No. 0 is stretched, and the tips 38a and 39a are matched with each other as shown in FIG. Then, when the tips 38a, 39a are pushed through the holes 36 by the tip of the small-diameter disk 106, the pair of swing arms 38, 39 open like doors and swing respectively. A projecting piece 38b is integrally formed on the swing arm 38, and a detection pin 41 is disposed at a position facing the projecting piece 38b, and the projecting piece 38b presses the detection pin 41 by swinging of the swing arm 38. To do.

The detection pin 41 is attached to one end of a first link 42 pivotally provided on the rear end side of the frame 3 as shown in FIG.
The other end of the first link 42 is connected to a second link 43 slidably arranged in the disc insertion direction. When the detection pin 41 is a small-diameter disk 106, the second link 43 is slid and the loading arm mechanism 7 is locked when the detection pin 41 is pressed by each disk through the swinging arm 38 and directly in the case of a large-diameter disk 101. It releases the state that has been set and enables it.

On the other hand, as shown in FIG. 1 and FIG.
A lock pin 44 is planted at the side end of the frame 3 and projects to the side of the frame 3. A lock mechanism 45 is provided on the frame 3 from which the lock pin 44 projects, and the lock pin 45 is locked by the lock mechanism 45 until the inserted disc is transported to a predetermined position, and the support frame 4 is fixed to the frame 3. ing. The loading arm 8 is moved downward by the operation of the loading arm operating mechanism 7, the lock mechanism 45 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. It

A movable lid 46 is attached to the frame 3 near the disc insertion opening 2.
Is attached so as to be openable and closable, and when the vehicle-mounted CD player is in use, the movable lid 46 moves to the disc insertion slot 2,
The disc is prevented from being accidentally inserted into the disc insertion slot 2.

Next, the operation will be described.

The centering mechanism 12 of the present invention has a particularly small diameter disc 106.
Since it is effective when using, the disk 106 having a small diameter will be described as an example.

When the small-diameter disc 106 is inserted into the disc insertion opening 2, the sensor 47 provided on the front portion of the top plate 3a is activated by the disc 106.
Is detected, the loading motor 10 is driven. Here, when the small-diameter disc 106 is inserted,
When the disc is inserted not in the center of the disc insertion opening 2 but in the center thereof, it abuts against one of the pair of centering pins 18 and 19 of the centering mechanism 12. When the disc 106 contacts one of the pair of centering pins 18 and 19, the centering mechanism 12 guides the disc 106 to the center of the disc insertion opening 2 as described above.

Then drive the loading motor 10 to drive the rollers.
9a is rotated to convey the inserted disc 106 toward the turntable 29 in cooperation with the driven roller 9b.
When the disc 106 is transported to the vicinity of the center of the turntable 29, the disc 106 has a diameter of 8 cm, and thus enters the disc recess 35 of the operation assisting plate 34. When the disk 106 is taken into the disk recess 35, the tip of the disk 106 presses the detection pin 41 through the pressing assist mechanism 37 facing the hole 36, as shown in FIG. That is, as described above, the disc 106 causes the swing arm 38 to swing, and the protruding piece 38b presses the detection pin 41.

When the detection pin 41 is pressed, the first link 42 swings around the pin 142 as shown in FIG.
2 to operate the loading arm mechanism 7, and as shown in FIG. 2, the clamper arm 32 has its side projecting piece 32.
When the pin 150 descends together with the loading arm 8, the a descends by the urging 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 lock mechanism 45 releases the lock state of the lock pin 44, and the support frame 4 is bufferedly supported by the frame 3 via the damper 5. Then, it becomes a floating state. In this way, the playback operation is ready and the spindle motor
30 is driven and the disc 106 through the turntable 29
To rotate. When the disc 106 is rotated, laser light is emitted from a read head (not shown), and the read head moves in the radial direction of the disc 106 to reproduce the music recorded on the disc 106.

By the way, it is difficult to insert the small-diameter disc 106 so as to be located in the center of the disc insertion opening 102 while the vehicle is traveling, and the user must pay attention, which may impair safety during traveling. is there. However, since the centering mechanism 12 is arranged in the vicinity of the disc insertion slot 2, the centering pins 18, 19 cause the disc 106 to move.
Is guided to the center of the disc insertion opening 2 even if it is inserted eccentrically.

Next, when a disc 101 having a diameter of 12 cm is inserted into the disc insertion opening 2, the disc 101 is located at the center of the disc insertion opening 2 because its diameter is substantially the same as the opening of the disc insertion opening 2. Easy to make. When the disc 101 comes into contact with the pair of centering pins 18 and 19 at the same time, the centering arms 13 and 14 can largely rotate about the support pins 16 and 17, and the pair of centering pins 18 and 19 can rotate the disc 1 and the disc 1.
Widely expand to a diameter of 12 cm of 01. Therefore, the diameter is 12 cm
The disc 101 is smoothly inserted into the in-vehicle CD player without being hindered from being inserted by the centering pins 18 and 19 of the centering mechanism 12.

The drive roller 9a is rotated by the driving of the loading motor 10 and is inserted in cooperation with the driven roller 9b.
101 is conveyed toward a predetermined position. When the disc 101 is transported to the vicinity of the predetermined position, the disc 101 has a diameter of 12
Since it is cm, it is conveyed along the lower surface of the operation auxiliary plate 34 without entering the disk recess 35 of the operation auxiliary plate 34. When the disc 101 is conveyed along the lower surface of the operation assisting plate 34, the detection pin is directly passed through without the press assisting mechanism 37.
Press 41. After that, the disk 106 having a diameter of 8 cm operates in the same manner, and when the disk 101 is rotated, laser light is emitted from the optical head to reproduce the recorded music.

The centering mechanism 12 is a pair of centering arms.
Since it is composed of parts such as 13, 14, the centering lever 15 and the guide pin 26, the number of parts is small, and there is no problem in terms of economy and durability.

〔The invention's effect〕

As described above, according to the present invention, the centering mechanism for guiding the disc to the center of the disc insertion opening is arranged. Therefore, even if the disc is biasedly inserted into the disc insertion opening, the centering mechanism causes the disc to move to the center of the disc insertion opening. Since the disc is guided into and inserted into the disc player, the disc can be reliably placed and fixed on the turntable. Further, when the disc is inserted eccentrically, the protrusion member moves in the circular head and is caught, so that the disc can be more reliably prevented from being inserted eccentrically. Further, since the centering mechanism has a simple structure, the number of parts is small, the assembly is easy, the cost is reduced, and the durability is improved.

[Brief description of drawings]

1 is a perspective view of a CD player according to the present invention, FIG. 2 is a perspective view of a support frame provided with a centering mechanism, FIG. 3 is a plan view of the centering mechanism, and FIG. 4 is A in FIG. FIG. 5 is an enlarged view of a portion, FIG. 5 is a perspective view of the operation assisting plate and the pressing assist mechanism, FIG. 6 is a cross-sectional view of the operation assisting plate and the pressing assist mechanism, and FIG. 7 is an enlarged view of part B in FIG. FIG. 8 is a plan view of a mechanism for operating the loading mechanism, and FIG. 9 is a perspective view of a conventional vehicle-mounted CD player. 2 ... Disc insertion slot, 12 ... Centering mechanism, 13 ...
… Centering arm, 14 …… Centering arm, 15
…… Centering lever, 18 …… Centering pin (contact part), 19 …… Centering pin (contact part), 25 …… Long hole (guide part), 25a …… Circular head (guide part), 26 ……
Guide pin (projection member, guide part), 29 …… turntable, 32 …… clamper arm, 101 …… disk, 106…
…disk.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Kobayashi 25-25 Nishimachi, Kawagoe-shi, Saitama Prefecture 1 Nishimachi, Kawada Plant, Pioneer Co., Ltd. (72) Masanori Sugihara 25-cho Nishimachi, Kawagoe, Saitama Prefecture 1 Pioneer Co., Ltd. Kawagoe factory (56) Reference JP-A-2-96973 (JP, A)

Claims (1)

[Claims] 1. A disc is inserted from a disc insertion opening, and the disc is guided to the center of the disc insertion opening by a centering mechanism. When the disc reaches a predetermined position of a player, a clamper arm is operated to turn the disc. In a disc player in which the disc is fixed on a table and the turntable is rotated to reproduce the recording in the disc, the centering mechanism is swingably provided at an interval at the disc insertion opening. A pair of centering arms, each of which has a contact portion with which the peripheral edge of the disc abuts, is formed at a distance from the disc insertion opening, and the centering arms are connected to the pair of centering arms. A centering lever that can move with respect to the frame and this centering lever. And a guide portion for guiding the movement of the lever, the guide portion including one protrusion member and an elongated hole having a circular head formed on one end side while penetrating the protrusion member. And a disc player.