JP2899357B2 - Traverse mechanism for disk-shaped recording media - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement in a traverse mechanism for a disc-shaped recording medium.

[Related Art] In recent years, disc-shaped recording medium reproducing apparatuses have been rapidly spread, and diversification has progressed in response to user requests. For example, conventionally, a mechanism for automatically loading a disc-shaped recording medium by a driving roller has been proposed. According to such a loading mechanism, excellent operability can be ensured, so that the disc-shaped recording medium reproducing device can be employed in an in-vehicle electronic device or the like.

A conventional example of the above-described disc-shaped recording medium reproducing apparatus will be specifically described with reference to the drawings.

That is, as shown in FIG. 8, a clamper arm 2 that rotates in the vertical direction is disposed above the disc-shaped recording medium reproducing device. At the tip of the clamper arm 2, a clamper ring 1 for pressing the disc-shaped recording medium 3 from above is provided. On the other hand, a traverse unit 6 is fixed below the playback device. This traverse unit 6
A turntable 5 having an upwardly projecting sleeve portion 5a is provided on the upper side. On the insertion side (right side in the figure) of the disc-shaped recording medium 3, a guide plate 4a is arranged to rotate vertically, and the drive roller 4 is arranged here. The drive roller 4 supports the disc-shaped recording medium 3 from below, and loads the disc-shaped recording medium 3 above the turntable 5 by its rotation.

According to the conventional example having the above-described configuration, when the center hole 3a of the disk-shaped recording medium 3 reaches above the center of the turntable 5 by the rotation of the drive roller 4, the clamper arm 2
Rotates downward, and the clamper ring 1 contacts the upper surface of the disc-shaped recording medium 3. At this time, the guide plate 4a also rotates downward with the rotation of the clamper arm 2. Therefore, the disk-shaped recording medium 3 is smoothly lowered on the turntable 5 by the rotation of the clamper arm 2 while being supported by the drive roller 4. Therefore, the center hole 3a of the disc-shaped recording medium 3 is fitted into the sleeve portion 5a, and the disc-shaped recording medium 3 is fixed to the turntable 5 (FIG. 9 → FIG. 10).

On the other hand, when the disc-shaped recording medium 3 is unloaded, the clamper arm 2 rotates upward, and the clamper ring 1 is released from the disc-shaped recording medium 3 on the turntable 5. At the same time, the guide plate 4a rotates upward, the drive roller 4 reverses, and the disc-shaped recording medium 3 is discharged.

[Problems to be Solved by the Invention] By the way, when the disk-shaped recording medium 3 is loaded and unloaded, the clamper ring 1 and the sleeve portion
A predetermined clearance c is required in the gap with 5a so that the disc-shaped recording medium 3 can be conveyed. Therefore, in the related art, the clearance c between the clamper ring 1 and the turntable 5 is created by the rotation of the clamper arm 2 as described above.

However, the above conventional techniques have the following problems.

That is, the descending stroke of the clamper ring 1 is relatively large because a stroke for fixing the disc-shaped recording medium 3 is required in addition to the descending stroke of the disc-shaped recording medium 3. As a result, the rotation angle of the clamper arm 2 was increased, and the size of the device was increased in the height and depth directions.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems of the prior art, and an object of the present invention is to ensure a smooth loading and unloading operation while reducing the size and thickness of a disc-shaped recording medium. Is to provide a traverse mechanism.

[Means for Solving the Problems] The traversing mechanism for a disk-shaped recording medium according to the first aspect of the present invention is mounted on an equipment chassis and an impact absorbing member in the equipment chassis, and includes a clamp means, a turntable, and a pickup. Traverse unit with a movable part, a mode plate reciprocally movable on the equipment chassis, a drive motor for driving the mode plate, and a standby position, loading / unloading position provided on the mode plate And a plurality of cam grooves in which a play position is formed, and a plurality of traverse shafts extending outward from the traverse unit and inserted through the cam grooves. In the standby position, the traverse unit applies a load to the shock absorbing member. Be provided so as not to apply It is characterized by.

The traverse mechanism for a disk-shaped recording medium according to the invention is provided with an equipment chassis and an impact absorbing member in the equipment chassis, and is provided with a clamp means, a turntable, and a pickup unit, and is capable of moving up and down. A unit, a mode plate arranged reciprocally on the equipment chassis, a drive motor installed on the equipment chassis to drive the mode plate, and a play position, loading / unloading position and standby provided on the mode plate. A plurality of cam grooves in which positions are formed, a plurality of traverse shafts extending outward from the traverse unit, and inserted into the cam grooves, and are disposed rotatably in the equipment chassis in parallel with the mode plate. A stopper arm for locking at least one Extending outwardly from Ppaamu, characterized in that a stopper arm shaft inserted through the at least one of said cam grooves.

[Operation] The operation of the present invention having the above-described configuration is as follows.

That is, according to the first aspect of the present invention, when the mode plate is moved by the drive motor, the traverse unit moves vertically between the plate position, the standby position, and the loading / unloading position via the traverse shaft inserted into the cam groove. The position is regulated by each position. At this time, the turntable on the traverse unit does not move arbitrarily, and accurate loading and unloading can be performed.

In the loading / unloading position, by restricting the traverse unit downward, it is possible to secure a sufficient transport space for the disk-shaped recording medium.

In addition, since the traverse unit has the standby position, no load is applied to the shock absorbing member in a state where it is regulated downward, and there is no possibility of deformation.

Further, at the play position, the entire traverse unit is raised, instead of the disk-shaped recording medium being lowered. Therefore, the rotation angle of the clamp means is reduced, and the height and length in the depth direction of the member can be reduced.

According to the second aspect of the present invention, when the mode plate is moved by the drive motor, the traverse unit moves vertically between the play position, the standby position and the loading / unloading position via the traverse shaft inserted into the cam groove. The position is regulated by each position. At the same time, the position of the stopper arm is regulated by rotating in the vertical direction via the stopper arm shaft inserted into the cam groove. Then, the traverse units located at the standby position and the loading / unloading positions are reliably held by the stopper arms. At this time, the turntable on the traverse unit does not move arbitrarily, and accurate loading and unloading can be performed.

Embodiment An embodiment of the traverse mechanism for a disc-shaped recording medium according to the present invention as described above will be specifically described with reference to the drawings. The same members as those in the related art are denoted by the same reference numerals, and description thereof will be omitted.

That is, as shown in FIG. 1, the traverse unit 25 is mounted on the equipment chassis 31 by an oil damper 24 that absorbs vibration.
It is set up and down freely. Three traverse shafts 32 extending outside the equipment chassis 31 are provided at side edges of the traverse unit 25. A stopper arm 26 drawn by a thick dotted line is installed on the inner wall of the side edge of the device chassis 31 so as to be rotatable about a support shaft 26a.
The stopper arm 26 is provided with a stopper arm shaft 33 protruding outside the equipment chassis 31. In addition, the tip of the stopper arm 26 has a distorted stopper 26b.
Are formed.

In addition, a mode plate 23 indicated by a thick line is provided on an outer wall of a side edge of the device chassis 31. This mode plate
As shown in FIG. 4, a rack gear 23a is formed at the front end (right side in the figure). The driving force from the driving motor 36 is transmitted via the rack gear 23a, and slides in the front-rear direction. In addition, the mode plate
23 has a guide groove 28, a guide hole 34 and a notch 35 as cam grooves.
Are formed. Of these, the guide groove 28 is formed at the center near the front end of the mode plate 23, and extends substantially obtusely.
The front end (right side in the figure) is located lower than the rear end (left side in the figure). On the other hand, the guide hole 34 is opened at the center of the mode plate 23, the upper edge thereof has the same shape as the upper edge of the guide groove 28, and the rear portion is largely opened. Notch 35 is the mode plate 23
Are formed at the upper and lower portions of the rear end, and are provided with a step portion that rises forward.

At this time, the stopper arm shaft 33 is inserted into the guide groove 28, while the traverse shaft 32 is inserted into and abuts on the guide hole 34 and the notch 35. Of these, the guide groove
The upper edges of the guide holes 28 and the guide holes 34 are arranged in the order from the rear end (left side in the figure) to the upper part, the play position, the lower part, the loading / unloading position, and the middle part, the standby part. Position.

On the other hand, the notch 35 has a loading
It becomes the unloading position, and the part regulated in the middle becomes the standby position. In the notch 35, there is no portion corresponding to the play position of the guide groove 28 and the guide hole 34, and the traverse shaft 32 is completely free.

By the way, the turntable 7 of the present embodiment accommodates sleeve portions 8 and 9 that can move up and down, and the traverse unit 25 is provided with a wedge-shaped arm 12 that drives the sleeve portions 8 and 9. ing. Hereinafter, the sleeve portions 8 and 9
The configuration of the wedge-shaped arm 12 will be described.

That is, as shown in FIG. 5, a concave portion 7a is formed in the center of the turntable 7, and an inner sleeve portion 8 and an outer sleeve portion 9 are disposed in the concave portion 7a. Of these, a tapered portion 8a inclined toward the center is provided inside the upper edge portion of the inner sleeve portion 8. The tapered portion 8a comes into contact with the outer periphery of the clamper ring 1. Further, a stepped portion 8b protruding outward is formed outside the upper edge portion of the inner sleeve portion 8.

On the other hand, the outer sleeve 9 is mounted in a gap between the inner sleeve portion 8 and the concave portion 7a of the turntable 7. Further, the upper edge 9a of the outer sleeve portion 9 comes into contact with the step 8b of the inner sleeve 8 from below. Furthermore, the upper edge 9a
Is provided with a tapered portion 9b.

An inner spring 10 and an outer spring 11 are provided inside the inner sleeve portion 8 and the outer sleeve portion 9, and the inner sleeve portion 8 and the outer sleeve portion 9 are always moved upward by the springs 10 and 11. Has been energized. In the state shown in FIG. 5, a plate-shaped wedge-shaped arm 12 is provided in the gap between the turntable 7 and the inner sleeve portion 8. The wedge-shaped arm 12 is configured to abut on the lower surface 8c of the inner sleeve portion 8 and slide intermittently into the turntable 7.

The operation of the present embodiment having the above configuration is as follows.

Standby mode As shown in FIG. 1, in the standby mode,
The mode plate 23 is at the retracted position, and the drive motor 36 is stopped. At this time, the traverse unit 25 and the stopper arm 26 take the standby position, and in the former, the traverse shaft 32 is regulated by the guide hole 34 and the notch 35, and in the latter, the stopper arm shaft 33 is regulated by the guide groove 28. At this time, the stopper portion 26 of the stopper arm 26
b locks the traverse shaft 32. As described above, in the standby mode, the traverse shaft 32 is locked by the guide hole 34, the notch 35 and the stopper arm 26 which are the cam grooves of the mode plate 23, so that the traverse unit 25 does not Damper 24
No load is applied to the oil damper 24
Can prevent wear. Moreover, as described later, the traverse unit 25 is regulated downward in the loading / unloading mode. In this case, the oil damper 24 may be deformed if it is restricted downward. Therefore, in this embodiment, the durability of the oil damper 24 is improved by taking the standby position.

Loading / Unloading Mode On the other hand, in the loading mode and the unloading mode, the rack gear 23a receives the driving force of the driving motor 36, and the mode plate 23 moves to the loading position shown in FIG. At this time, the traverse shaft
The traverse unit 25 descends because the 32 moves downward along the guide hole 34 and the notch 35. The stopper arm 26 rotates counterclockwise in the drawing, and the stopper 26
The locking of the traverse shaft 32 by b is maintained.
As described above, since the traverse shaft 32 is locked, the traverse unit 25 is securely held. Therefore, the turntable 7 on the traverse unit 25 does not move arbitrarily, and loading and unloading can be performed at accurate timing.

As shown in FIG. 5, the wedge-shaped arm 12 is in contact with the lower surface 8c of the inner sleeve portion 8 while the turntable 7
Is inserted inside. Therefore, the inner sleeve portion 8 is housed in the recess 7 a of the turntable 7 by the wedge-shaped arm 12. At the same time, since the step 8b of the inner sleeve portion 8 pushes down the upper edge 9a of the outer sleeve portion 9, the outer sleeve portion 9 is also housed in the recess 7a. Thereby, a sufficient clearance can be secured in the gap between the clamp ring 1 and the turntable 7, and the disc-shaped recording medium 3 can be smoothly and reliably conveyed.

Play Mode When the disc-shaped recording medium 3 is mounted on the turntable 7, as shown in FIG. 3, the rack gear 23a receives the driving force of the drive motor 36, and the mode plate 23 moves to the play position. At this time, the traverse shaft 32 moves upward along the guide hole 34 and the notch 35, so that the traverse unit 25 rises. On the other hand, since the stopper arm shaft 33 also moves upward along the guide groove 28, the stopper arm 26 rotates clockwise in FIG.
Accordingly, the restricting force on the traverse shaft 32 from above is eliminated, and the traverse unit 25 is supported by the oil damper 24 in the equipment chassis 31. Therefore, even if vibration is applied to the equipment chassis 31, the oil tamper 24 can absorb the vibration, and a stable playing state can be obtained.

In the play mode, as shown in FIGS. 6 and 7, the wedge-shaped arm 12 is also provided in the recess 7a of the turntable 7.
Is released from. Accordingly, the inner sleeve portion 8 and the outer sleeve portion 9 are pushed up by the inner spring 10 and the outer spring 11 in the turntable 7. In this way, the tapered portion 8a of the inner sleeve portion 8 protruding upward from the turntable 7 contacts the clamper ring 1 to center the disc-shaped recording medium 3. On the other hand, the tapered portion 9b of the outer sleeve portion 9 which similarly projects is fitted into the center hole 3a of the disk-shaped recording medium 3 to be securely fixed to the turntable 5.

According to the present embodiment as described above, in the play mode and the loading / unloading mode, the clamper arm 2 and the disc-shaped recording medium 3 do not move up and down as in the related art, but the entire traverse unit 25 and the sleeve portion 8. , 9 move up and down. Therefore, the clamper arm 2
Can be made extremely small, and there is no need to provide an extra clearance c, which facilitates downsizing of the device. As a result, it is possible to increase the number of installations even for a device having a large restriction in the height direction such as an in-vehicle electronic device, and it is possible to easily deploy the models.

It should be noted that the traverse mechanism of the disk-shaped recording medium of the present invention is not limited to the above-described embodiment, and the shape and dimensions of each member can be appropriately changed.

[Effect of the Invention] As described above, according to the present invention, the equipment chassis is provided with the traverse unit that moves up and down via the shock absorbing member, and the reciprocating mode plate is provided with the play position, the standby position, and the loading position.
The traverse unit has a simple configuration in which a cam groove is formed in the unloading position and a shaft inserted in the cam groove is provided in the traverse unit. In the unloading position, the traverse unit is regulated downward to secure a sufficient transport space for the disc-shaped recording medium, and in the play position, the entire traverse unit is raised, thereby reducing the rotation angle of the clamp means. Thus, it is possible to provide an excellent disc-shaped recording medium traversing mechanism capable of reducing the size and thickness of the apparatus. A stopper arm that is rotatably disposed on the equipment chassis in parallel with the mode plate and that locks at least one of the traverse shafts, extends outward from the stopper arm, and is inserted into at least one of the cam grooves. With the provision of the stopper arm shaft described above, the traverse unit located at the standby position and the loading / unloading position can be reliably held by the stopper arm.

[Brief description of the drawings]

1 to 3 are side sectional views of one embodiment of the present invention. FIG. 1 shows a standby mode, FIG. 2 shows a loading / unloading mode, and FIG. 3 shows a play mode. FIG. 4 is a side view of the mode plate of this embodiment, and FIG.
7 are side sectional views showing the configuration of the turntable of the present embodiment, FIG. 8 is a side view of the conventional example, and FIGS. 9 and 10 are side views of the main parts of the conventional example. 1 ... Clamper ring, 2 ... Clamper arm, 3
...... Disc-shaped recording medium, 4 ... Drive roller, 5 ... Turntable, 6 ... Sleeve, 7 ... Turntable,
8 inner sleeve part 9 outer sleeve part 10
Inner spring, 11 ... Outer spring, 12 ... Wedge arm, 25 ... Traverse unit, 26 ... Stopper arm, 28 ... Guide groove, 29 ... Spring, 30 ... Fixing pin, 31 ... Equipment chassis , 32 ... traverse shaft,
33 ... Stopper arm shaft, 34 ... Guide hole, 35 ...
… Notch, 36 …… Drive motor.

Continuation of the front page (56) References JP-A-61-151869 (JP, A) JP-A-2-98863 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G11B 17 / 04

Claims (2)

(57) [Claims] 1. An apparatus chassis, a vertically movable traverse unit installed in the apparatus chassis via a shock absorbing member and provided with a clamp means, a turntable and a pickup section, and reciprocally movable to the apparatus chassis. A mode plate disposed; a drive motor for driving the mode plate; a plurality of cam grooves provided on the mode plate and having a standby position, a loading / unloading position, and a play position; And a plurality of traverse shafts extending through the cam groove, and in the standby position, the traverse unit is provided so as not to apply a load to the shock absorbing member. Traverse machine for rotating recording media Structure. 2. A device chassis, a vertically movable traverse unit provided in the device chassis via a shock absorbing member and provided with a clamping means, a turntable and a pickup portion, and reciprocally movable to the device chassis. A mode plate provided; a drive motor installed on the equipment chassis to drive the mode plate; and a plurality of modes provided on the mode plate, wherein a standby position, a loading / unloading position, and a play position are formed. A cam groove; a plurality of traverse shafts extending outwardly from the traverse unit and inserted through the cam groove; and at least one of the traverse shafts disposed rotatably on an equipment chassis in parallel with the mode plate. A stopper arm for locking the stopper arm; A traverse mechanism for a disc-shaped recording medium, comprising: a stopper arm shaft extending outwardly from the medium and inserted through at least one of the cam grooves.