JPH08167219A - Disk reproducing device - Google Patents

Abstract

PURPOSE: To provide a small disk reproducing device such as a DC player. CONSTITUTION: The disk reproducing device is provided with a drive unit 3 consisting of an upwards an downwards moving base 4 having a couple of closable/openable feed rollers 42, 43 for transporting a recording medium and a reproducing section 5 provided to the upwards and downwards moving base 4 in a rocking free way, and a disk containing section 2 in which a magazine M containing recording media is loaded. The feed roller 43 on the lower stage side is provided in the vicinity of a turntable mounted on the reproducing section 5. A recessed step is provided nearly in the middle of the feed roller 43, and the turntable is provided in such a way that part of its circumferential face enters the step.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus for reproducing a disc-shaped recording medium on which music information or the like is recorded, and particularly, a recording medium selected from a plurality of recording media is taken out and reproduced. The present invention relates to a disc reproducing device having a changer function.

[0002]

2. Description of the Related Art In recent years, CDs (Compact Discs) and L discs have been used as disc-shaped recording media for recording music information and the like.
D (laser disk) and the like are known.

On the other hand, there is known a disc reproducing apparatus for reproducing such a recording medium, which has a changer function for taking out and reproducing one recording medium selected from a plurality of recording media. There is.

For example, there is a CD player as shown in FIG. 10 as such a disc reproducing apparatus. This CD
The player includes a chassis 1 fixed in a housing (not shown), a disc storage portion 2 formed in the chassis 1, and a vertically movable drive unit provided in an area adjacent to the disc storage portion 2. 3 and 3.

Of these, the disc storage portion 2 is provided with a guide rail (not shown) on the bottom surface thereof so that the magazine M can be smoothly loaded into the disc storage portion 2. The magazine M contains a plurality of compact discs d as recording media.

On the other hand, the drive unit 3 includes an elevating table 4 provided with a pair of feed rollers 4a (one of which is not shown) for transferring the compact disc d, and a reproducing section 5 provided on the elevating table 4 so as to be swingable. Composed of and.

Particularly, the reproducing unit 5 has a compact disc d.
Playback equipment such as optical pickups and turntables are installed.

According to this CD player, the drive unit 3 operates in the vertical direction in the figure, and when it reaches a predetermined position, it projects from a rod (not shown) to take out the selected compact disc d from the magazine M, and then the compact disc. The disk d is sandwiched by a pair of feed rollers 4a, drawn to the position of the imaginary line, and reproduced on the spot.

[0009]

However, according to the above-mentioned conventional disc reproducing apparatus, the recording medium is not completely pulled out from the magazine and is reproduced while a part thereof is left in the magazine. Although it has the advantage that it is small and the time required for preparation for reproduction is extremely short, it has been desired to be smaller.

On the other hand, by providing the guide rails in the disc storage portion, it becomes possible to smoothly load the magazine. The guide rails are fixed at both ends to the bottom surface of the disc storage portion with screws. However, when it expands and contracts due to changes in the outside temperature, it may break or deform.

In view of the above circumstances, the present invention aims to reduce the size of the disk reproducing apparatus and prevent breakage or deformation of the guide rail due to temperature change.

[0012]

In order to achieve the above-mentioned object, the present invention provides an elevator having a pair of openable and closable feed rollers for transferring a disk-shaped recording medium, and a swingable mount provided on the elevator. And a drive unit configured with a reproducing unit on which a reproducing device including a turntable that rotatably supports the recording medium is mounted, and a disk storage unit for loading a magazine storing a plurality of the recording media. In the disc reproducing device provided, at least the lower feed roller, which is close to the turntable, of the pair of feed rollers is provided with a stepped portion having a constant width and having a concave shape at substantially the center over the entire circumference. The present invention provides a disc reproducing apparatus characterized by:

Further, it includes an elevating table having a pair of openable and closable feed rollers for transferring the disc-shaped recording medium, and a turntable rotatably provided on the elevating table and rotatably supporting the recording medium. In a disc reproducing apparatus including a drive unit configured with a reproducing unit on which a reproducing device is mounted, and a disc storing unit for loading a magazine storing a plurality of the recording media, a bottom surface of the disc storing unit is provided. Is provided with a guide rail for slidably supporting the magazine, and the guide rail has a long hole at one end, and the long hole is supported by a support pin projecting from the bottom surface of the disc storage portion. The present invention provides a disc reproducing apparatus characterized by:

[0014]

According to the present invention, by forming a step in the approximate center of the feed roller adjacent to the turntable, the turntable can be moved to the side of the feed roller by the step. As a result, the drive unit can be downsized by that amount, and the downsizing of the entire disc reproducing apparatus can be achieved.

On the other hand, when the guide rail is heated or cooled due to the fluctuation of the outside air temperature, the elongated hole of the guide rail expands and contracts while being supported by the support pin.
Therefore, since the elongated portion is absorbed by the elongated hole, the guide rail can be prevented from breaking or deforming.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an example showing the internal structure of a disc reproducing apparatus. In the figure, 1 is a chassis, 2 is a disc housing, and 3 is a drive unit. As the disc reproducing device, there are a CD player, an LD player, and the like, but FIG. 1 particularly shows a vehicle-mounted CD player.

The chassis 1 is a metal frame, in which a disk housing 2 and a drive unit 3 are provided.

The disk storage portion 2 is a rectangular area formed by a sheet metal 21 and has a magazine M indicated by a chain line.
Can be loaded. A guide rail 22 is laid on the bottom surface of the disk storage portion 2 in the loading direction of the magazine M, and the guide rail 22 is slidable in the magazine M loaded from the loading port 23 in the arrow direction of the drawing. It is supported so that it can be loaded smoothly.

On the other hand, the drive unit 3 includes the chassis 1
The lift table 4 is provided so as to be lifted up and down, and the reproducing unit 5 is swingably provided on the lift table 4.

The elevating table 4 includes a metal plate 41 having an inverted concave cross section which is supported by the chassis 1 so as to be vertically movable, and the metal plate 4.
A pair of feed rollers 42, 43 rotatably supported by arms 41a, 41b pivotally mounted on both side surfaces of
Clamp arm 44a pivotally attached to the upper surface of sheet metal 41
And a rod (not shown) provided on one side surface of the sheet metal 41 so as to move back and forth. Of these, the feed rollers 42, 43 are opened / closed in conjunction with the reproduction section 5 and are closed. The recording medium is sandwiched to load or unload the recording medium.
Also swings in conjunction with the reproducing unit 5 and rotatably supports a recording medium together with a turntable described later in a horizontal state, and the rod projects when the drive unit 3 reaches a predetermined position and the magazine M Remove the recording medium from.

On the other hand, the reproducing section 5 includes a T-shaped sheet metal 51 having a rear end pivotally attached to the lift 4 and a turntable 52 attached to the drive shaft of the motor M1 fixedly mounted on the sheet metal 51. , A carriage 53 that is provided in the opening 51a of the sheet metal 51 so as to be movable back and forth. The turntable 52 rotates a recording medium supported in association with a motor M1, and the carriage 53 moves forward and backward by a reversible motor M2. However, the recording information is sequentially read from the recording medium being rotated by the built-in optical pickup S at the time of backward movement. It should be noted that cams 54, 54 driven by a reversible motor M3 are provided on both sides of the front end of the metal plate 51, and the cams 54, 54 are provided on the metal plate 41 constituting the lifting table 4 so as to project from pins (not shown). It is supposed to be supported by.
Therefore, when the cams 54, 54 rotate in the forward and reverse directions, the reproducing portion 5 swings around the mounting portions 55, 55 as fulcrums (FIG. 2).
reference).

In particular, when the reproducing section 5 operates in the tilting direction, the feed rollers 42, 43 are operated in the closing direction via the arm 41a connected to the reproducing section 5 by the springs f, f (see FIG. 2), Then, the recording medium is sandwiched and loaded.
On the contrary, when the reproducing section 5 operates in the horizontal direction, the feed roller 4
2 and 43 come to be opened, while the clamp arm 4
When the rear end of 4a is pressed by the reproducing unit 5, the clamp board 44 and the turntable 52 are closed to hold the loaded recording medium.

Next, the magazine M is shown in FIGS. In particular, FIG. 3 is a plan view showing the internal structure of the magazine M, and FIG.
Is a side view thereof.

This magazine M has a rectangular casing 61 having an opening on one side and an opening 61a at the side, a partition plate 62 disposed in the casing 61, and an inner wall surface 61b of the casing 61. Leaf spring 63 fixed to the inner wall surface 61 of the housing 61
slidable push rod 64 provided in c and opening 6
It is composed of a rotatable lever 66 mounted on a support shaft 65 provided upright at one corner of the facing surface of 1a.

In the magazine M, the disc storage portion 2 is arranged with the opening 61a facing the drive unit 3 side.
When the push rod 64 is pushed in by the above-mentioned rod, the lever 66 is operated via the push rod 64, and the compact disc d as a recording medium accommodated in the housing 61 is opened in the opening 61a. Is pushed out in the direction of the drive unit 3.

The partition plate 62 is notched on the side of the opening 61a according to the curvature of the compact disc d. In addition, the leaf spring 63, the push rod 64, the lever 6
As shown in FIG. 4, 6 is provided for each of a plurality of shelves 67, ... Formed by the partition plate 62.

Next, the essential part of the present invention will be described with reference to FIGS. FIG. 5 shows the positional relationship between the lower feed roller 43 and the turntable 52. As is clear from this figure, a turntable 52 is provided close to the lower feed roller 43.

The feed roller 43 has a rotating shaft 43a made of a hard material such as metal, and a grip member 43 made of a soft material such as silicon rubber fitted on the rotating shaft 43a.
b, 43b. Grip member 43
b is a tubular shape having a wall thickness of 1 to 2 mm and is fitted on both sides of the rotary shaft 43a.
The center of the rotary shaft 43a on which 3b is not fitted is 10
In a bare state with a width of about 30 mm, a concave step R is provided here.

The turntable 52 is provided at a position where a part of the peripheral surface enters the step R.

By the way, the upper feed roller 42 is attached in a state in which the recording medium (compact disc d) being loaded is slightly protruded toward the disc accommodating portion 2 side so as to maintain the horizontal state (FIG. 6). In some cases, it may be mounted directly above the lower feed roller 43 (FIG. 7). In the case of the embodiment as shown in FIG. 6, it is desirable that the upper feed roller 42 also has the form as shown in FIG. 5 like the lower feed roller 43, and in the embodiment as shown in FIG. The feed roller 42 may have a configuration in which a grip member made of silicon rubber or the like is provided in series on the rotary shaft as in the conventional case.

On the other hand, FIG. 8 is a plan view of the guide rail 22. The guide rail 22 is made of synthetic resin or the like, and has an elongated plate shape as illustrated. A long hole 22a is opened at one end of the guide rail 22 in the longitudinal direction, and a circular hole 22b is opened at the other end.

The long hole 22a is a hole having a total length of 15 mm and a width of about 3 mm, and particularly has a key hole shape having a round hole portion e having a diameter of about 6 mm on one end side. Then, as shown in FIG. 9, the guide rail 22 is formed by first inserting the round hole portion e into the support pin P projectingly provided on the bottom surface of the disk housing portion 2, and then sliding the guide rail 22 along the elongated hole 22a. ,
It is fixed by screwing a screw Q into the bottom surface of the disc storage portion 2 from the circular hole 22b. The guide rail 2
Since the head h of the support pin P supports the edge of the long hole 22a at one end of the support pin 2, it does not come off from the support pin P.

Although the embodiment of the present invention has been described by taking the on-vehicle CD player as an example, the present invention can be implemented not only by another CD player but also by an LD player or the like.

[0034]

According to the present invention, a stepped portion having a constant width and having a concave shape is provided at substantially the center of the feed roller over the entire circumference, so that the turntable adjacent to the feed roller is provided by the stepped portion. It can be moved to the front side (feed roller side).

In particular, the reproducing unit having the turntable mounted thereon can be moved forward, which leads to downsizing of the drive unit, and as a result, the entire disk reproducing apparatus can be downsized.

On the other hand, a long hole is formed at one end of the guide rail for supporting the magazine, and the long hole is supported by the support pin projecting on the bottom surface of the disk storage portion, so that the guide rail can be expanded and contracted. It can be absorbed in the long holes.

Therefore, even if the guide rail expands and contracts due to fluctuations in the outside temperature, it is possible to prevent the damage or deformation.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an internal structure of a disc reproducing device.

FIG. 2 is a perspective view of a reproducing section provided in the disc reproducing apparatus.

FIG. 3 is a plan view showing an internal structure of a magazine loaded in the disc reproducing apparatus.

[Figure 4] Side view of the magazine

FIG. 5 is a schematic plan view showing a positional relationship between a lower feed roller and a turntable.

FIG. 6 is a schematic side view of a disc reproducing apparatus showing a positional relationship between a pair of feed rollers with a recording medium being loaded.

FIG. 7 is a schematic side view of the disc reproducing apparatus showing another positional relationship between a pair of feed rollers with a recording medium being loaded.

FIG. 8 is a plan view of a guide rail provided in the disc storage portion.

FIG. 9 is a cross-sectional view showing a state in which the guide rail is attached to the bottom surface of the disc storage portion.

FIG. 10 is a plan view showing the internal structure of a conventional disc reproducing apparatus.

[Explanation of symbols]

 d Compact Disc M Magazine R Step P Support Pin 1 Chassis 2 Disc Storage 22 Guide Rail 22a Long Hole 22b Circular Hole 3 Drive Unit 4 Lifting Table 42,43 Feed Roller 5 Playback Section 52 Turntable

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoaki Yoshida 1-1-1 Sakata, Oizumi-cho, Ora-gun, Gunma Prefecture FMS Audio Audio Sendiriyan Bahad (72) Inventor Yoshiaki Tsubokura Gunma Prefecture 1-1-1 Sakata, Oizumi-cho, Euraku-gun FM MS Audio Sendi Lian Bahad

Claims (2)

[Claims] 1. A lift table having a pair of openable and closable feed rollers for transferring a disk-shaped recording medium, and a turntable rotatably mounted on the lift table and rotatably supporting the recording medium. In a disc reproducing apparatus including a drive unit configured with a reproducing unit on which a reproducing device is mounted, and a disc storing unit for loading a magazine storing a plurality of the recording media, At least the lower feed roller adjacent to the turntable is provided with a stepped portion having a constant width and having a concave shape substantially in the center over the entire circumference. 2. A lift table having a pair of openable and closable feed rollers for transferring a disk-shaped recording medium, and a turntable rotatably supported on the lift table and rotatably supporting the recording medium. In a disc reproducing apparatus including a drive unit configured with a reproducing unit on which a reproducing device is mounted, and a disc storing unit for loading a magazine storing a plurality of the recording media, a bottom surface of the disc storing unit is provided. Is provided with a guide rail for slidably supporting the magazine, and the guide rail has a long hole at one end, and the long hole is supported by a support pin projecting from the bottom surface of the disc storage portion. A disc reproducing device characterized by.