JPH03132990A - Information recording disk player - Google Patents

Abstract

PURPOSE:To shield the pulsation of air caused by the warpage of a disk so that there is no influence of the pulsation to a circuit board by providing a shield member between the circuit board, which is provided parallelly above a disk carry surface of a turn table, and the disk carry surface. CONSTITUTION:A circuit board 42, which carries a circuit for executing the operation control of a disk player, is provided above a turn table 24, parallel to the disk carry surface of the turn table 24. A shield member 36 is interposed between the disk carry surface of the turn table 24 and the circuit board 24. Then, the pulsation of air caused by the warpage of a disk 29 which accompanies the rotation of the turn table 24, can be shielded by a shield member. Thus, an information recording disk player, with no influence of the pulsation of air to the circuit board arranged above the turn table 24, can be obtained.

Description

[Detailed description of the invention] Technical field The present invention relates to an information recording disc player.

BACKGROUND ART Conventionally, in an information recording disc player, as shown in FIG. It is common practice to arrange the circuit board 3 parallel to the carrier surface. By providing the circuit board 3 at such a position, the space utilization efficiency within the player housing 4 is increased, and the overall size of the player can be easily reduced. However, in the information recording disc player having such a configuration, when the disc 1 is warped, the air inside the player housing 4 pulsates due to the warp as the turntable 2 rotates, and the circuit board 3 The upper circuit is affected by this pulsation, which may affect, for example, the disc playing state, causing discomfort to the user.

Summary of the Invention [Object of the Invention] The present invention has been made in view of the above points, and its purpose is to provide information that is free from the influence of air pulsations on a circuit board placed above a turntable. An object of the present invention is to provide a recording disc player.

[Structure of the invention]

In the information recording disc player according to the present invention, a circuit board is disposed within the player housing substantially parallel to the disc supporting surface above a turntable that supports and rotates the information recording disc on the disc supporting surface. The information recording disc player is characterized in that a shielding member is interposed between the disc supporting surface and the circuit board.

[Action of the invention]

In an information recording disc player having such a configuration, air pulsations caused by warping of the disc due to rotation of the turntable are shielded by the shielding member.

Embodiments Hereinafter, an autoloading disc player as an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the player housing 1
1, that is, the front panel 12, is provided with a rectangular opening 12a extending in the left-right direction so that a generally rectangular plate-shaped tray 13 serving as a disc holder can protrude from and be housed in the player housing. ing. However, the direction of arrow X is to the left, and arrows Y and Z indicate forward and upward, respectively. On the front panel 12, together with a switch group 15 for operating the disc player, there is a rectangular plate-shaped lid 16 that closes the opening by coming into contact with the contact surface 12b at the edge of the opening 12a. It is provided. An airtight member 18 made of rubber or the like is provided on the contact surface 12b of the opening 12a, and the back edge of the lid 16 can come into contact with this airtight member 18. The airtight member 18 is continuously provided around the entire edge of the opening 12a, and is formed in a rectangular ring shape as a whole. Further, the airtight member 18 has a surface 12 of the opening 12a.
It is fitted into the groove formed in b.

A pair of arm members 19 are integrally connected at one end to the back surface of both left and right ends of the lid body 16.

Note that only the left arm member is shown in the figure.

Hereinafter, only the left arm member 19 and its related peripheral mechanisms will be described, but the right arm member and its peripheral mechanisms are constructed in the same manner.

As shown in FIG. 2, a pin 19a is provided at the other end of the arm member 19 and projects in the left-right direction. It is pivotally supported. The guide member 21 is formed by forming a steel plate or the like into a rectangular plate shape, is fixed to the back surface of the front panel 12 with screws (not shown), etc., and extends in the front-rear direction. The pivot guide portion 21a formed on the guide member 21 and pivotally supporting the bottle 19a of the arm member 19 is a long hole extending perpendicularly to the contact surface 12b at the edge of the opening 12a, and therefore, The bottle 19a, that is, the other end of the arm member 19, is pivotable and slidable within the elongated hole.

The guide member 21 includes a parallel guide portion 21b parallel to the pivot guide portion 21a, and an arcuate guide portion 21c extending continuously from the front end of the parallel guide portion with the pivot center of the arm member 19 as the center of curvature. is formed. Another bin 19b is actually provided in the middle part of the arm member 19 in parallel with the above-mentioned bin 19a, and this bin 19b is slidably fitted into the parallel guide part 21b and the arcuate guide part 21c.

A linear link member 23 is disposed near the end of the arm member 19, and one end of the link member 23 is pivoted to the above-mentioned pin 19b.

At the other end of the link member 23 is a bin 2 parallel to the bin 19b.
3a is fixed to the guide member 21, and extends in the front-back direction of the guide member 21, that is, in the direction perpendicular to the contact surface 12b of the opening 12a. It is fitted.

Although not shown, a biasing means for biasing the lid 16 in the closing direction is provided. Specifically, the biasing means consists of a coil spring, one end of which is connected to the pin 1.
9b, and the other end is connected to the rear part of the guide member 21.

Here, the disk transport mechanism including the tray 13 will be explained.

As shown in FIGS. 1 and 2, the tray 11 is movable within the player housing 11 in a direction perpendicular to the disk supporting surface of the turntable 24, that is, in an up and down direction (in the direction of arrow Z and the opposite direction). It is supported movably in the front-rear direction (direction of arrow Y and the opposite direction) by a substantially flat container 25 provided therein. Although not shown, a tray drive means for reciprocating the tray 11 back and forth with respect to the container 25 is provided. A pair of vertical surfaces 25a extending upward are formed on both left and right sides of the container 25, and a pair of pins 25b are provided on the outer surface of each chamber surface, spaced apart in the front-rear direction and projecting outward. It is set up. A pair of left and right rectangular plate-shaped cam members 26, that is, movable members, are provided between the container 25 and the tray 11 so as to sandwich the vertical surface 25a of the container 25.

Each cam member 26 is provided so as to be able to reciprocate in the front-rear direction with respect to the player housing 2. Also,
Although not shown as a whole, these two cam members 2
A cam member driving means is provided for reciprocating 6 in synchronization. As shown in FIG. 2, a rack portion 26a is provided at the lower side of the front end of the cam member 26 along the moving direction of the cam member.
is formed, and a pinion 28 is engaged with the rack portion. This pinion 28 is rotationally driven by a motor (not shown) via a speed reduction mechanism. These motors, speed reduction mechanisms, binions 28, and rack portions 26a constitute the above-mentioned cam member driving means.

As shown in FIG. 2, each pin 25b protruding from the vertical surface 25a of the container 25 is slidably engaged with a cam groove 26b formed in each cam member 26. The cam groove 26b is formed as a whole so as to be inclined forward (in the direction of arrow Y) and downward (in the direction opposite to arrow Z). That is,
By reciprocating each cam member 26 back and forth, the container 25 is moved up and down together with the tray 13 supported by it, that is, in a direction perpendicular to the disk supporting surface of the turntable 24. It is.

The above-described cam member driving means and the cam member 26 are collectively referred to as a container driving means that moves the container 25 up and down together with the tray 13 supporting the container 25. Further, two optical information recording disks to be played (see FIG. A disk transport mechanism is configured to transport the disc (as shown in FIG. 1) or 30 to a performance position by a performance means including a turntable 24 and an optical pickup (not shown), and conversely transport the disc from the performance position back to the outside of the player housing. .

On the other hand, the aforementioned opening/closing operation of the lid body 16 is performed by the cam member 26, which is the aforementioned movable member. That is, as shown in FIG. 2, a roller 23b is attached to the other end of the link member 23, one end of which is pivotally connected to the intermediate part of the arm member 19 that supports the lid 16, and the cam member 26 front end 2
6d is brought into contact with this roller 23b. Therefore, the link member 23 operates as the cam member 26 reciprocates, thereby opening and closing the lid 16. As will be described later, when the lid 16 is opened and closed, the arm member 19 supporting the lid 16 pivots and moves in parallel in a direction perpendicular to the contact surface 12b of the edge of the opening 12a. We will also do the following.

Further, as is particularly clear from FIG. 2, the arm member 19 is formed so as to protrude away from the back surface of the lid body 16 and then curve in a direction toward the front surface of the lid body 16. It is formed in the shape of a letter. Because of this shape, one arm member can freely pivot without interfering with the edge of the opening 12a.

Note that the one arm member and the guide member 21 that guides the lid 16 constitute a lid moving mechanism for moving the lid 16 toward and away from the airtight member 18. There is.

Next, the casing structure including the player housing 11 will be explained based on FIGS. 3 to 5.

As shown in FIGS. 3 to 5, the player housing 1
1 is formed into a rectangular parallelepiped shape as a whole, and a shell member 33 made of resin is fixedly installed inside the player housing. Note that four insulators 34 are attached to the four corners of the lower surface of the bottom plate of the Brejano/Using 11.

As shown in the figure, the shell member 33 has a support portion 33a that supports the turntable 24 and a support member 36, and leg portions 33b that are coupled to the outer peripheral portion of the support portion and extend downward. Side wall portions 33c extending upward are formed on both left and right sides of the supporting portion 33a. Plate-shaped shielding members 36 to 38 made of steel plates, resin, or the like are installed between the upper ends of these side wall portions 33c. Each shielding member 36
38 are formed by bending their both sides at substantially right angles, thereby increasing the rigidity of the whole.

Note that the above-mentioned disk transport mechanism is the turntable 24.
At the same time, it is surrounded by a partition wall formed by the side wall portion 33c of the supporting portion 33a1 and each of the shielding members 36 to 38. As described above, since the tray 13 can be protruded from and stored in the player housing 11, the space surrounded by the partition wall is open toward the front (in the direction of arrow Y).

Further, the space is also opened toward the rear.

A large number of ventilation holes (not shown) are formed in the back surface 11a of the player housing 11 facing this rear open end. In this configuration, as the two disks rotate due to the rotation of the turntable 24, air convection occurs in the space, outside air flows into the space through the ventilation hole, and the air in the space leaks outside.

Due to this convection, the heat generated by the spindle motor 37 that rotationally drives the turntable 24 is effectively guided to the outside, and an increase in temperature within the player housing 11 is suppressed.

Further, the power transformers 39 and 40 are arranged so as to be surrounded by the player housing rear portion 11a in which the ventilation hole is formed as described above and the leg portion 33b at the rear end of the shell member 33. By arranging the transformers in this position, the heat emitted from each of the transformers 39 and 40 can be effectively dissipated outside the player by the above-mentioned convection. Further, as described above, since the leg portion 33b at the rear end of the shell member 33 is interposed between the playing means consisting of the turntable 24 and the optical pickup (not shown) and the transformer, the transformer 39 The heat generated by the player and 40 does not reach the playing means.

Furthermore, as is clear from Fig. 3, each transformer 39 and 4
0 is the rear end of the player and is located at the center of the player in the left-right direction.

By arranging the comparatively heavy transformer in this manner, the weight balance between the left and right sides of the player is maintained.

As shown in FIGS. 3 to 5, the turntable 24
Above the turntable 24 is a circuit board 42 carrying a circuit for controlling the operation of the disc player.
parallel to the disk supporting surface of the disk. The aforementioned shielding member 36 is interposed between the disk supporting surface of the turntable 24 and this circuit board 42.

By the way, if the two discs to be played are warped, the air within the player housing may generate pulsations due to the warp as the turntable 24 rotates. In this disc player, as described above, since the shielding member 36 is interposed between the turntable 24 and the circuit board 42 above it, this pulsation does not reach the circuit board 42.

In addition to the circuit board 42 described above, several circuit boards 43 to 46 are provided. The circuit boards 43 and 44 are disposed along the outer surfaces of the left and right side walls 33C of the shell member 33. Circuit board 4 placed on the right side of the player
3 is for audio playback, which is one of the functions of the disc player, and another circuit board 44 provided on the left side of the player is for video playback. Of the transformers 40 and 39 described above, the right transformer 40 serves for audio reproduction, and the other transformer 39 serves for video reproduction. As is clear from these configurations, an audio playback system and a video playback system are separately provided on the right and left sides of the player, sandwiching the disc transport mechanism (described above).

Next, the operation of the autoloading disc player having the above configuration will be briefly explained with reference to FIGS. 6 and 7.

First, as shown in FIGS. 1 and 2, the tray 13 is projected out of the player housing, and a disc to be played, such as a digital video disc 29, is placed on the tray. Note that the player housing 11 of the tray 13
The outward projecting operation is performed by following the completely opposite process of the retracting operation described below, so a detailed description thereof will not be given.

After the disc 29 is placed on the tray 13, the disc loading switch of the switch group 15 on the front panel 12 is operated. Then, the tray 13 is pulled into the player housing 11 and reaches the storage position.

Following this, a motor (not shown) rotates, and the cam member 26 as a movable member begins to move rearward (in the opposite direction to the arrow Y). The initial movement of the cam member 26 causes the lid 16 to close.

That is, in FIG. 2, when the cam member 26 moves slightly rearward, the link member 23, which is biased rearward by a coil spring (not shown), moves rearward to follow the cam member 26. do. Therefore, the arm member 19 supporting the lid 16 is pivoted clockwise in FIG. 2 about the bottle 19a, resulting in the state shown in FIG. 6.

At this time, the pin 19b that pivotally connects the intermediate portion of the arm member 19 and one end portion of the link member 23 to each other slides along the arcuate guide portion 21c of the guide member 21, and
1c and the parallel guide portion 21b that continues therefrom, the pivoting of the arm member 19 is thereby restricted.

Since the cam member 26 continues to move rearward even after reaching the state shown in FIG. 6, the link member 23 is further pulled rearward,
The bin 19a is placed along the pivot guide 21a, and the bin 19a
b moves along the parallel guide portion 21b, and one arm member moves in parallel toward the rear. Therefore, the back surface of the lid 16 is pressed against the airtight member 18.

After that, the cam member 26 is further moved rearward, whereby the pin 25b protruding from the container 25 is lowered by the action of the cam groove 26b of the cam member 26, and the container 25 is lowered together with the tray 13 loaded thereon. do. Therefore, the disc 29 is placed on the turntable 24,
In addition, the turntable 2 is mounted by a clamp mechanism (not shown).
Clamped against 4. In this state, the motor that was moving the cam member 26 stops, and the turntable 24
rotates and the disc begins to play.

When the performance is finished, follow the process in reverse to the above to release disc 2.
9 is returned outside the player housing 11 and collected. In this return process, the lid body 16 is moved in parallel forward (in the direction of the arrow Y) in the opposite direction to the above-mentioned closing operation, and then is moved counterclockwise in FIG. 2 around the pin 19a. be pivoted in a direction.

In the above embodiment, the cam member 26 is used as a movable member for opening and closing the lid 16, but the cam member 26 has a movement stroke sufficient to open and close the lid 16. Lid body 16 by other movable members
It is also possible to have a configuration in which the opening and closing are performed. In that case, if the movement stroke of this movable member is relatively small and there is no need to move further rearward away from the link member 23 like the cam member 26, the front end of the movable member can be moved to the link member 23. It may be pivoted to. In this case, the lid 16 as provided in the above embodiment
a coil sling (not shown) that biases the
becomes unnecessary. However, since it is necessary to match the movement stroke of the movable member and the stroke of the arm member 19 with high precision when the movable member is pivoted in this manner, it is better to use a structure in which a coil spring is interposed between the two as described above. preferable.

Further, the link member 23 provided in the above embodiment is not necessarily necessary, and a configuration in which the front end of the cam member 26 is directly engaged with the arm member 19 is also possible. However, if you do this, the arm member 1
When the arm member 9 pivots, a state occurs in which one arm member and the front end portion of the cam member 26 rub against each other. In the configuration of the above embodiment, the cam member 26 and one arm member are connected to the link member 2.
Since they are engaged by circumferential coupling via 3, rubbing between the two is prevented.

Effects of the Invention As detailed above, in the information recording disc player according to the present invention, the circuit board disposed above the disc carrying surface of the turntable substantially parallel to the disc carrying surface and the disc supporting surface are connected to each other. A shielding member is interposed between the discs and the shielding member to shield air pulsations caused by warping of the disk as the turntable rotates. Therefore, the circuits W and [ are not affected by pulsation.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an autoloading disc player according to the present invention, FIG. 2 is an enlarged view of a part of the internal mechanism of the autoloading disc player shown in FIG.
The figure is a plan view including a partial cross section of the housing structure of the autoloading disc player shown in FIG. 1, and FIGS.
The Ir plane view, FIGS. 6 and 7 are explanatory diagrams of the operation of the autoloading disc player shown in FIGS. 1 and 2,
FIG. 8 is a front view of the internal mechanism of a conventional information recording disc player. Explanation of symbols of main parts 11... Player housing 12... Front panel 13... Tray 16... Lid body 18.
...Airtight member 19...Arm member 21...
・Guide member 23...Link member 24...
Turntable 25...Container 6...Cam member 9.30...Disk 3...Shell member 36...Shielding member 940
・・・Power transformer

Claims (2)

[Claims] (1) An information recording display player in which a circuit board is disposed substantially parallel to the disk supporting surface above a turntable that supports an information recording disk on a disk supporting surface and rotates the information recording disk within a player housing. hand,
An information recording disc player characterized in that a shielding member is interposed between the disc supporting surface and the circuit board. (2) The information recording disc player according to claim 1, further comprising a shell member that supports the shielding member and forms a partition wall surrounding the turntable.