JPH069096B2 - Disk insertion / ejection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] Regarding a disc inserting / ejecting mechanism for information recording / reproducing, a guide roller is rotatably held on a guide rail for rotatably holding a driven roller for inserting and ejecting a disc by pressing the disc onto a drive roller. By providing at least two guide grooves for guiding the shaft of the rail driven roller in the pressure contact direction and the pressure contact release direction, and an elastic member for biasing the shaft while keeping the shaft rotatable in the pressure contact direction with respect to the guide rail, crimping is performed. We will reduce the number of parts and the number of assembly steps by equalizing the force, preventing vibration, and reducing the guide rail drive force.

[Industrial application field]

The present invention relates to a disc insertion / ejection mechanism for inserting and ejecting an information recording / reproducing disc made of a rigid disc into a recording / reproducing position.

For example, in a compact disc (CD), laser disc (LD) device, etc., a rigid disc-shaped medium is used as a recording medium. The present invention relates to a disc insertion / ejection mechanism for inserting and ejecting such a rigid disc at a recording / reproducing position.

[Conventional technology]

FIG. 3 is a principle diagram showing the principle of a conventional disc insertion / ejection mechanism. The driven roller 13 is rotatably held with respect to the guide rail 14 by passing shafts at both ends thereof through shaft holes provided in the guide rail 14 and stopping with E-rings 24-1 and 24-2. The guide rail 14 is driven, for example, in a direction in which the driven roller 13 is pressed against the drive roller 12 and in a direction opposite thereto by driving forward / reverse rotation about the rotating shaft 23 by some driving means (not shown). The drive roller 12 is rotated in the forward direction and the reverse direction by another drive means (not shown) around the rotation shaft 22. The elastic member 21 biases the guide rail 14 with respect to the main body in a direction in which the driven roller 13 is pressed against the drive roller 12.

When the drive roller 12 is rotated counterclockwise in FIG. 3 and the driven roller 13 is pressed against the drive roller 12 by the action of the elastic member 21, the disk 11 is inserted between the drive roller 12 and the driven roller 13, The disk 11 is drawn between the two rollers by the counterclockwise rotation of the drive roller 12, and slides to the right in the figure. Thereafter, when the drive roller 12 rotates clockwise while the disk 11 is sandwiched between the two rollers, the disk 11 slides to the left in the figure. If the slide of the disc 11 to the right in the figure is the disc inserting operation, the slide to the left is the disc ejecting operation.

[Problems to be solved by the invention]

The above-mentioned conventional disc insertion / ejection mechanism has some problems. First, considering the axial distribution of the crimping force by the driven roller 13, in the mechanism described above, the crimping force is uniform in the axial direction due to the influence of the dimensional accuracy of the guide rail 14 and the dimensional accuracy of the guide rail mounting portion. There is a problem that it is not distributed, and in an extreme case, it may be a one-sided contact.

Secondly, since there is a gap between the shaft of the driven roller 13 and the insertion hole of the shaft provided in the guide rail 14, when an external force is applied due to vibration or the like, the shaft moves between the insertion holes. However, there is a problem that this causes abnormal noise as “chatter” or adversely affects performance.

Thirdly, in order to release the pressure contact of the driven roller 13, when the guide rail 14 is moved in the releasing direction, it must be driven against the bias force of the elastic member 21, and the bias force is driven by the drive roller 12. There is a problem that a large driving torque is required because the roller 13 becomes larger as the roller 13 moves away.

[Means for solving problems]

FIG. 1 is a principle diagram of the present invention. According to this figure, the disc insertion / ejection mechanism of the present invention is a disc insertion / ejection mechanism for holding the disc and inserting it into the recording / reproducing position and ejecting it from the recording / reproducing position. The disc 11 is moved in the inserting direction and the ejecting direction. A drive roller 12 that rotates to press and a driven roller 1 that presses the disk 11 to press it against the drive roller 12.
3 and a guide rail 14 for rotatably holding the shaft of the driven roller 13 and the guide rail 14
In the disc insertion / ejection mechanism, the drive mechanism drives the disc 11 in a pressure contact direction for pressing the disc 11 against the drive roller 12 and in a pressure contact release direction for releasing the pressure contact. In the guide rail 14, the shaft of the driven roller 13 is pressed in the pressure contact direction At least two guide grooves 1 for guiding in the releasing direction
Disks 5-1 and 15-2, and elastic members 16-1 and 16-2 for biasing the shaft of the driven roller 13 while keeping the shaft rotatable with respect to the guide rail in the pressure contact direction. It is an insertion / ejection mechanism.

[Action]

Since the driven roller 13 is biased with respect to the guide rail 14, even if the dimensional accuracy of the guide rail 14 is somewhat poor or the dimensional accuracy of the guide rail mounting portion is somewhat poor, the driven roller 13 is irrelevant to the axial direction. Is pressed with a uniform force.

Further, since the driven roller 13 is biased with respect to the guide rail 14, the driven roller 13 is subjected to external force such as vibration.
The shaft does not move in the guide grooves 15-1 and 15-2, so that abnormal noise is not generated and performance is not adversely affected.

Further, since the bias force of the elastic members 16-1 and 16-2 acts between the guide rail 14 and the driven roller 13, it is not possible to increase the force required to drive the guide rail 14 when releasing the pressure contact. Absent.

〔Example〕

FIG. 2 is a side view showing a CD player for reproducing a compact disc (CD) as an example in which the disc insertion / ejection mechanism of the present invention is incorporated together with a disc clamper drive / holding mechanism and a disc clamp mechanism. Of these, (1) represents the state immediately before the disk clamper 32 descends, and (3) represents the disk 11 with the disk clamper 32.
Is clamped between the turntable 31 and the turntable 31, and (2) represents an intermediate state between (1) and (3).

First, a portion corresponding to a specific example of the disc insertion / ejection mechanism according to the present invention will be described. When viewed from the disc insertion side (left side in FIG. 2), the guide rail 14 is provided with a horizontally long slot to determine the insertion position of the disc 11. The driving roller 12 is rotated by driving means (not shown) so as to insert and eject the disk 11 between the driven roller 13 and the driven roller 13. The driven roller 13 has two guide grooves 15 at both ends of its shaft.
-1, 15-2 (15-2 is not shown) and is biased toward the drive roller 12 by two elastic members 16-1, 16-2 (16-2 is not shown). ing.

When a disc is inserted into the long hole provided in the guide rail 14, the first detector (not shown) detects it and the drive roller 12 starts rotating in the disc insertion direction.
The driven roller 13 contacting with it also starts to rotate. At this time, the driven roller 13 and the guide rail 14 are in the positions shown in FIG. 2 (1). When the disk 11 is pushed between the rotating driving roller 12 and the driven roller 13, the disk 11 is drawn between the two rollers and slides in the inserting direction. When the disk 11 reaches the position shown in FIG. 2 (1), a second detector (not shown) detects it and the rotation of the drive roller 12 is stopped. Second
In FIG. 1A, the drive roller 12 and the driven roller 13 are drawn as if they are in contact with each other. However, in reality, after the two rollers sandwich the disk 11, the driven roller 13 is the thickness of the disk 11. Is pushed down in the figure. At this time, the guide rail 14 cannot move from the position shown in FIG. 2 (1), so that the shafts at both ends of the driven roller 13 are lowered downward along the guide grooves 15-1 to 15-2 to resist it. The biasing force of the elastic members 16-1 to 16-2 acts, and a uniform crimping force is obtained in the axial direction. Further, the elastic members 16-1 to 16-2, as shown in FIG.
In order to hold the biased shaft in the center of the guide grooves 15-1 to 15-2, it is bent into a V shape near the center of the guide grooves to form a bearing portion. As a result, the driven roller 1
The shafts at both ends of 3 are held so that they do not come into contact with the side walls of the guide grooves 15-1 to 15-2, and "chatter" due to external force such as vibration.
Is completely prevented.

Next, the disk clamper drive and holding mechanism will be described.

The drive lever 52 includes two slits 5 together with a slit 523 including a drive holding slit 54 and a drive slit 55.
21, 522 are provided. These two slits 521 and 522 respectively guide the pins 103 and 104 integrated with the housing 100 in the horizontal direction, and, conversely, the drive lever 52 can slide horizontally with respect to the housing. . It is the pin 712 (described in detail later) that pushes the drive lever 52 to the left, and the elastic member 56 that biases it to the right against the pin 712. The clamper arm 33 and the transmission lever 51 are integral with each other and can rotate about the rotation shaft 34. The transmission lever 51 is integrally provided with a pin 53.
Is guided to a slit 523 including a drive holding slit 54 and a drive slit 55 provided in the drive lever 52.

The relationship between the clamper arm 33 and the disc clamper 32 is such that the center portion of the disc clamper 32 is loosely fitted in the circular hole of the clamper arm 33. The disk clamper 32 has diameters a, b, c (c>a>) in order from the top of the drawing.
The disk of b) is concentrically stacked, and the relationship with the size of the diameter d of the hole of the clamper arm 33 is a>d> b. In order to fit the disc clamper 32 into the clamper arm 33, a hole of diameter e having a relation of a <e is formed in the clamper arm 33, and this hole is connected to the hole of diameter d like a snow dharma. ing. At the time of mounting, the disc clamper 32 is fitted into the hole of diameter e from the side of diameter a, moved to the hole of diameter d, and the stopper 110 is screwed to the clamper arm 33, so that the disc clamper 32 has a hole of diameter e. The disk clamper 32 is attached to the clamper arm 33 by preventing the disk clamper 32 from returning to and coming off.

Next, the operation of the disk clamper driving and holding mechanism will be described. When the second detector described above detects that the disk 11 has reached the position shown in FIG. 2A, the rotation of the drive roller 12 is stopped and the pin 712 starts moving to the right. In the position of FIG. 2 (1), the drive lever 52 is pushed by the pin 712 against the biasing force of the elastic member 56 and is in the position as shown in the figure. When the pin 712 moves horizontally to the right in the figure, the drive lever 52 slides to the right due to the biasing force of the elastic member 56. Then, since the pin 53 is guided by the slit of the drive lever 52, the transmission lever 51 and the clamper arm 33, which are integrated with the pin 53, are lowered, and the disc clamper 32 is also lowered. In FIG. 2 (2), the pin 53 is being guided by the drive slit 55 and is descending. In FIG. 2 (3), the pin 53 is guided to the drive holding slit 54 via the drive slit 55,
As a result, the disc clamper 32 clamps the disc 11 at a predetermined position on the turntable 31. When the clamp is completed, the clamper arm 33 does not descend even if it is pushed further, so that the clamper arm 33 stops descending, and the pin 53 is stopped with a margin to be guided into the drive holding slit 54, so that the drive arm 52 is also stopped. . However, the pin 712 still moves to the right,
Therefore, the pin 712 and the drive arm 52 are separated from each other. The purpose of this operation will be described later. The drive holding slit 54 is provided so as to guide the pin 53 in the radial direction of a circle centered on the rotary shaft 34 of the clamper arm. Therefore, even if the disc clamper 32 receives a force such that the disc clamper 32 is lifted, the direction in which the pin 53 moves and the direction in which the pin 53 is guided are at a right angle, and therefore the disc clamper 32 is not lifted by this force. Further, the drive lever 52 is always pulled to the right in the figure by the elastic member 56, and it can move because it is not at right angles to the direction in which the pin 53 is guided with respect to this force direction. Acts as a force to lower the disc clamper 32 downward. Therefore, the clamping force by the elastic member 56 always acts, and the disc clamper 3
2 and the turntable 31 are completely clamped together with the force of attracting each other by the magnetic force. Further, since the angle formed by the guide direction of the drive slit 55 and the drive direction of the drive lever 52 is larger than that of the drive holding slit 54, the horizontal displacement of the drive lever 52 required to move the disc clamper 32 up and down by a predetermined distance. Has been made smaller, which contributes to downsizing of the device.

Finally, a disc clamp mechanism for clamping the disc 11 while holding it properly will be described.

The main lever 711 has slits 714 and 715, and guides the pins 102 and 105 respectively integrated with the housing in the horizontal direction in the figure. Therefore, the main lever 711 can also slide horizontally like the drive lever 52. Although not shown, the main lever 711 is screwed integrally with a member provided with a rack, and is driven right and left in the figure by rotating a pinion gear that meshes with the rack with a motor. The above-mentioned pin 712 is the main lever 7
11, the main lever 711 moves left and right in cooperation with the elastic member 56 to move the drive lever 52 left and right, and as a result, the disc clamper 32 is moved up and down.
The main lever 711 is also provided with a slit 713,
This slit 713 is a pin 1 integrated with the guide rail 14.
Since 01 is guided, the left and right movements of the main lever 711 also serve to move the guide rail 14 up and down.

As an example, when the slit 713 is provided as shown in FIG. 2 and the relative positional relationship between each lever and pin is determined as shown in the figure, the following operation can be performed. First, when the state of FIG. 2 (1) is changed to the state of (2) or the main lever 711 is moved to the right, the guide rail 14 does not move, and therefore the state 12 sandwiched between the driving roller 12 and the driven roller 13 hardly changes. On the other hand, since the disc clamper 32 descends, one end of the disc 11 descends and is held in contact with the fixed support portion 61. When the main lever 711 further moves to the right from the state of FIG. 2 (2), the disk clamper 3
2 simultaneously descends, the pin 101 is guided by the inclined portion of the slit 713 and descends, whereby the guide rail 14 begins to descend, and both ends of the shaft of the driven roller 13 are positioned at the upper ends of the guide grooves 15-1 and 15-2. When it reaches, the driven roller also starts to descend, and finally the disk 11 separates from the drive roller 12, and is supported by three points of the fixed support portion 61 of the driven roller 13 and the disk clamper 32, and the other end starts to descend. By appropriately adjusting the inclination of the slit 523 and the inclination of the slit 713, it is possible to guide the disk 11 to the clamp position while always supporting the disk 11 at three points with a constant force. Disk 1
When the clamping of No. 1 is completed, as described above, the drive arm 5
Although 2 cannot be moved and is separated from the pin 712, the guide rail 14 is further lowered, whereby the driven roller 13 is separated from the disk 11, and finally the state shown in FIG. This state is detected by pressing a first limit switch (not shown) with a protrusion (not shown) provided on the main lever 711, and the driving motor is stopped.

The operation from the insertion of the disk to the completion of the clamp has been described above, but the operation from the release of the clamp to the ejection of the disk follows the opposite path, and therefore will not be described in detail. The end of the leftward movement of the main lever 711 is detected by a second limit switch (not shown) provided opposite to the above-mentioned first limit switch, and at the same time when the main lever 711 stops, the drive roller 12 Starts rotating in the discharging direction.

〔The invention's effect〕

As described above, in the disc insertion / ejection mechanism of the present invention, a uniform pressure contact force by the driven roller is obtained, vibration prevention measures are realized, and the drive force required for releasing the pressure contact is minimal.

Further, the E ring 24- which is required in the conventional mechanism
Since no parts such as 1, 24-2 are required, the number of parts is reduced and the number of assembling steps is reduced.

[Brief description of drawings]

 FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing an embodiment of the present invention, and FIG. 3 is a diagram showing a conventional disc insertion / ejection mechanism. In the figure, 11 ... Disk, 12 ... Drive roller, 13 ... Followed roller, 14 ... Guide rail, 15-1, 15-2 ... Guide groove, 16-1, 16-2 ... Elastic member.

Claims (1)

[Claims] 1. A disc insertion / ejection mechanism for holding a disc (11) and inserting it into a recording / reproducing position and ejecting it from the recording / reproducing position, for moving the disc (11) in an inserting direction and an ejecting direction. Rotating drive roller (12) and disk (1
1) a driven roller (13) for pressing and pressing the driven roller (12), a movable guide rail (14) holding the shaft of the driven roller (13), and the guide rail (14). The driven roller (13) is a disc (1
1) is pressed to drive the drive roller (12) in a pressure contact direction and in a pressure contact release direction to release the pressure contact, and the disc (1) is connected to the turntable (31).
Drive means (10) for driving the disc clamper (32) for clamping 1) in the unclamping direction and the clamping direction.
1,713,711,712,52,523,53,5
1, 33), the driven roller (13) is attached to the guide rail (14).
Of the driven roller having at least two guide grooves (15-1, 15-2) for guiding the shaft of the driven roller in the pressure contact direction and the pressure contact release direction, and a bearing portion for holding the shaft of the driven roller (13). Guide rails (14) at both ends of the shaft independently of each other
On the other hand, the disk insertion / ejection mechanism is characterized in that elastic members (16-1, 16-2) for biasing the side wall of the guide groove in the press contact direction are provided so as not to contact the side wall.