JPH07105105B2 - Disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a disc reproducing method in which a plurality of discs are housed in a magazine and desired discs are sent out from the magazine to reproduce information on the discs. Regarding the device.

[Conventional technology]

Recently, a disc reproducing apparatus has been developed in which a plurality of compact discs are laminated in a magazine in a laminated state, and a tray holding the compact discs is sent out from the magazine to reproduce information on the compact discs.

Such a disc reproducing device 170, as shown in FIGS.
It has a magazine storage section 171 into which a magazine M for storing a plurality of compact discs in a stacked state is inserted, and a compact which is adjacent to the magazine storage section 171 and is held on a tray t sent out from within the magazine M. An information reproducing section 172 for reproducing information on the disc d is provided. The tray t in the magazine M is rotated to feed the compact disc d into the information reproducing unit on the left side of the figure adjacent to the magazine storing unit 171 and the information reproducing unit 172, and from there, the tray t is stored in the magazine M. A tray rotating member 173 is provided for storing the tray in the tray. The tray rotating member 173 has two arms extending at right angles to each other, and these arms are orthogonal to each other at the corner of the magazine M.
It is arranged opposite to the side. The tray rotating member 173 is rotatable by a known tray rotating mechanism 174 provided on the left side of the information reproducing section 172 in the figure.

The tray rotating member 173 is rotated over a range of 90 degrees, and one arm 173a of the tray rotating member 173 projects from an opening formed on the side surface of the magazine M as shown in FIG. Opposite the tray side t ₀ . By moving the magazine M up and down by a mechanism (not shown) to make the side surface t ₀ of the tray t storing the desired compact disk face the arm 173a and rotate the tray rotating member 173 counterclockwise in the figure. The tray t is rotated 90 degrees about a pin 180 provided at the corner of the magazine M as an axis and sent out to a predetermined position (clamp position) of the information reproducing section 172. And tray t
When the trays are stored in the magazine M, the tray rotating member 173
Is rotated in the clockwise direction, whereby the tray t is stored in the magazine M.

The tray t has a disc storage recess 181 for storing a disc in the center thereof. Normally the disc housing recess 181 has a diameter suitable for accommodating the compact disc d ₀ of 12cm, compact disc d of the small diameter of 8cm in addition to a compact disc d ₀ Recent 12cm
₁ has appeared. This small diameter 8cm compact disc
When using d ₁ , a donut-shaped adapter S is provided in the disc storage recess 181 and the 8c is inserted in the adapter S.
It is designed to accommodate a compact disc d ₁ with a small diameter of m.

After the tray t is delivered to the clamp position of the information reproducing section 172, as shown in FIG. 7, a disc is rotated by a spindle motor 190 provided on the upper surface of the support wheel 191 and a clamper provided below the support wheel 191. 192
The compact disc is rotated by sandwiching it with the spindle motor 190, and information on the disc is reproduced by a pickup (not shown). An opening O is formed in the tray t, and a clamper 192 rises from below the opening O to clamp the disc on the tray t in cooperation with the support wheel 191.

When the clamper 192 moves up and holds the disc between the clamper 192 and the support wheel 191,
Horseshoe-shaped disc guide 15 to ensure its clamping
With 0, the upper surface of the disc is pressed and guided. Pins 151, 151, 151 are provided at appropriate positions on the disc guide 150, and the disc guide 150 is moved up and down via the pin 151 by a disc guide raising mechanism (not shown).

[Problems to be Solved by the Invention]

However, the horseshoe-shaped disc guide 150 is provided at a position where it can press the periphery of a compact disc d _{0 having} a large diameter of 12 cm. This compact disc
Since information is rarely recorded in the vicinity of the outer periphery of d ₀ , it is desirable to provide the disc 150 at this position.

In order to guide the large-diameter compact disc d ₀ , the disc guide 150 may be provided around it,
In this position, the compact disc d ₁ having a small diameter of 8 cm cannot be guided. In order to hold the compact disc d ₁ having a small diameter of 8 cm on the tray t, the adapter S
Is provided between the outer circumference of the disc d ₁ and the disc storage recess 181 so that the compact disc d ₁ having a small diameter of 8 cm is held on the tray t through this adapter S. However, the precision of the adapter S is not good, and if the guide disc 150 presses the adapter S in a state in which the adapter is not accurately accommodated in the disc accommodating portion 181, the compact disc d ₁ having a small diameter is placed at a predetermined position. There was a problem of removing it from.

In view of the above point, the present invention is a disc reproducing apparatus capable of reliably guiding not only a compact disc having a large diameter of 12 cm but also a compact disc having a small diameter of 8 cm even against adverse conditions such as vibration and vertical placement. The purpose is to provide.

[Means for Solving the Problems]

The present invention inserts a magazine containing a plurality of discs in a stacked state into a magazine storage part, and sends a tray holding a desired disc from the magazine to an information reproducing part provided with a pickup by a tray transport mechanism. In a disc reproducing device in which a disc is rotated by a guide wheel guiding the upper surface of the disc by a spindle support wheel and a clamper to rotate the disc, the disc guide is provided outside the support wheel. It is also characterized in that it is installed in the lead-in area where the information of the disc is not recorded.

[Action]

A support wheel rotated by a spindle motor provided in the information reproducing section, and a clamper provided below the support wheel and vertically moved to cooperate with the support wheel to clamp the disk, clamp the disk, A disc guide is provided outside the support wheel, and the disc guide is installed in an area where the surface of a disc having a small diameter of 8 cm can be pressed. By arranging the disc guides in such an area, it is possible to reliably guide not only a disc with a large diameter of 12 cm but also a disc with a small diameter of 8 cm when clamping the disc.
If the disc guide is installed outside the support wheel and in the lead-in area of the disc, the information recording surface on which the information of the disc is recorded is not damaged.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the disc reproducing apparatus 1 of the present invention has a magazine storing section 2 for storing a magazine M, and an information reproducing section 3 is provided adjacent to the magazine storing section 2. A plurality of trays are stored in the magazine M in a stacked state, and compact discs are stored in the central portion of the trays. The information reproducing section 3 has a spindle motor 4 in the center thereof, and a pickup 5 is provided adjacent to the spindle motor 4, and the pickup 5 slides in the radial direction of the compact disc by a drive motor 6, The information on the compact disc inserted in the reproducing unit 2 is read. A tray rotating mechanism 10 is provided along two orthogonal sides of the information reproducing section 3, and the tray rotating mechanism 10 has a large-diameter cam gear 11 provided at a corner of the information reproducing section 3. is doing. A gear is formed around the large-diameter cam gear 11, and a reversible drive motor 17 is connected to the gear via a gear mechanism G. The gear mechanism G has a first gear 12, the first gear 12 meshes with a gear formed on the outer periphery of the cam gear 11, and the first gear 12 meshes with a second gear 13. The second gear 13 rotates integrally with the third gear 14, and the third gear 14 meshes with a worm gear 15, which is attached to the rotary shaft of the drive motor 17. The drive motor 17 is a reversible motor, and the drive motor 17 rotates the cam gear 11 in the clockwise direction and the counterclockwise direction. The cam gear 11
A cam groove 18 is formed on the back side of the pin, and one end of an arm 19 forming one end of the link mechanism L is pinned in the cam groove 18.
It is engaged through P ₁ . The arm 19 is rotatable about a shaft 20 attached to the frame, and has a pin P ₂ at the other end. The arm 19 is connected to a lever 21 forming a part of the link mechanism L via the pin P _2, and the pin P ₂ is engaged with a laterally extending long groove 21 a formed at the front end of the lever 21. .

At the rear end of the lever 21, a pin extending vertically is formed.
25 is provided, the upper portion of the pin 25 is engaged with and guided by the long hole 26a provided in the frame 26, and the lower portion of the pin 25 is at the front left corner of the magazine M stored in the magazine storing section 2. It engages with an elongated hole 33 of a tray rotating member 27 for transporting the tray provided along the tray. The tray rotating member 27 has a sickle shape and extends along the side surface of the magazine M.
27a and an arm 27b extending along the front surface of the magazine M.

The arm 27a of the tray rotating member faces a part of the tray protruding from the opening formed in the front end portion of the side surface of the magazine M, and the arm 27b is the front surface of the trays stacked in the magazine M. Is facing. A pin 31 projects downward from the arm 27a and a pin 32 projects from the arm 27b, the pin 31 is engaged with an arcuate hole 29 formed in a frame 28, and the pin 32 is Arc hole
Engaged with 30. The tray rotating member 27 is rotatable over a range of 90 degrees, and this rotating range is the arcuate hole.
When the tray rotation member 27 is rotated counterclockwise in the figure, the tray facing the arm 27a is rotated about the pivots attached to the corners of the magazine M, and the tray is regulated by 29, 30. When the tray is fed to the clamp position of the information reproducing section 3, the tray is stopped, and when the tray rotating member 27 is rotated clockwise in the figure, the tray fed into the information reproducing section 3 is rotated into the magazine M. Moved back.

A specially shaped cam groove 48 is formed on the upper surface of the cam gear 11, and a pin P ₄ attached to a front end supporting ear 147a of an operating arm 147 extending substantially parallel to the lever 21 of the link mechanism L is formed in the cam groove 48. Engaged (Fig. 2). The operation arm 147 is provided with elongated holes 49, 50 at intervals, the upper end of a column 51 is engaged with the elongated hole 49, the upper end of a column 52 is engaged with the elongated hole 50. Guide the reciprocating motion of the operating arm 147. A vertical ear 53 hangs down from the rear end of the operating arm 147, and a guide pin 59 extends laterally from the vertical ear 53 (Fig. 3). On the other hand, a guide plate 54 is provided adjacent to the vertical ear 53, and a horizontal hole 55 is provided in the guide plate 54. A swing arm 56 is disposed adjacent to the guide plate 54, and the swing arm 56 is pivotally connected to a rear end of the guide plate 62 by a pivot pin 57. The guide plate 62 also has the horizontal hole.
A horizontal hole 63 is provided in parallel with 55 and over the same length. Further, the swing arm 56 is provided with an inclined hole 60,
The guide pins 59 are extended through the horizontal holes 55 and 63 formed in the guide plates 54 and 60 and the inclined hole 60 of the swing arm sandwiched between the guide plates. Therefore, when the operating arm 147 moves from the state shown in FIG. 3 to the right side in the figure, the guide pin 59 also moves to the right side, and the guide pin 59 is placed in the horizontal holes 55 and 63 of the guide plates 54 and 62. The swing arm 56 having the inclined hole 60 is rotated clockwise about the pivot pin 61 as the guide pin 59 moves. That is, the left side of the swing arm 56 in the figure is lifted upward. At the front end of the swing arm 56, a link 58 has a pivot pin 57.
The lower end of the link 58 is connected via the clamper support plate 46.
Is pivotally connected to a connecting plate 46b formed at the end of the.

The clamper support plate 46 is swingably supported by the support ears 47a, 47a of the fixed plate 47. The clamper support plate
Support ears 46a, 46a are formed at the tip of 46, and the support ears 46a
A horizontal pin 45 is rotatably held on the. The horizontal pin 45 communicates with a support portion hanging from both sides of the member 44, a support pin 43 is provided upright from the member 44, and the clamper 41 is supported on the upper end of the support pin 43.

A horseshoe-shaped disc guide 42 is provided outside the support wheel 40 rotated by the spindle motor 4, and the horseshoe-shaped disc guide 42 is vertically moved by a disc guide vertical movement mechanism U.

The disc guide vertical movement mechanism U has a driven arm 171, one end of which is swingably supported via a pivot pin 73 supported by support ears 72, 72, and the other end of which is As shown in FIG. 4, it has a connecting recess 171a, and the upper end of a guide pin 75 standing upright from the disc guide 42 is connected to this connecting recess 171a via its large-diameter head 76. The guide pin 75 extends vertically through the opening of the fixing member 173, and the disc guide 42 is a guide pin.
In addition to 75, it is supported by guide pins 74 and 78. Guide pins 78 provided between the guide pins 75 and 74
Is inserted into a blind hole 77 formed in the fixing member 173. A compression spring 79 is provided between the lower surface of the fixing member 173 and both sides of the disc guide 42, and the guide pin 78 is loosely fitted in the compression spring 79. The compression spring 79 always moves the disc guide 42 downward. Is urged to. A cam follower 174 is formed so as to project from the side surface of the central portion of the swing arm 171, and the cam follower 174 contacts the cam 70 formed on the peripheral edge of the upper surface of the disc guide
An inclined cam 70a is formed on the cam 70 over a certain angle range. When the cam follower 174 engages with the rising position of the inclined cam 70a, the guide pin 75 is moved relative to the fixing member 173 to the disc guide 42.
Pull upwards. After the link mechanism L operates and the tray rotating member 27 rotates 90 degrees counterclockwise from the state of FIG. 1 to completely feed one tray in the magazine M to the clamp position of the information reproducing section, The operating arm 147 moves from the state shown in FIG. 2 to the left side in the drawing to move the clamper support plate.
46 is rotated to raise the clamper 41 held at its tip. In conjunction with this, the cam follower 174 of the swing arm 171 rides on the inclined cam 70a formed on the peripheral edge of the cam gear, and the disc guide 42 comes in contact with the upper surface of the disc from the lower position and the clamper 41 rises. And it rises while guiding it. That is, the shapes of the cam grooves 18 and 48 and the cam 70 are formed in a relative positional relationship so that the tray rotating member 27, the clamper 41 and the disc guide 42 operate at the above timing. When the disc is stored in the magazine M, the cam gear 11 is reversely rotated, the clamper 41 is lowered, and accordingly, the disc guide 42 is lowered by the extension of the compression spring 79 and held in the tray. The moving member 27 is reversed and the tray is stored in the magazine M.

The horseshoe-shaped disc guide 42 is preferably covered with felt, which is a soft material, and its mounting position is outside the support wheel 40, and the central portion of the small-diameter compact disc d ₁ where information is not recorded. It is desirable to be in the lead-in area a (see FIG. 5).
The disc guide 42 has a horseshoe shape because the pickup is inserted through its opening.

〔The invention's effect〕

If the disc guide is provided in the lead-in area of the disc as described above, it is possible to effectively prevent the information recording portion of the disc from being scratched.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic structure of a disc reproducing apparatus of the present invention, FIG. 2 is a perspective view showing a clamper operating mechanism and a vertical movement mechanism of a disc guide of the present invention, and FIG. FIG. 4 is a perspective view of the disc guide vertical movement mechanism, FIG. 5 is a plan view showing the arrangement of the disc guide with respect to the disc, and FIG. 6 is a plan view of a conventional disc reproducing apparatus. , FIG. 7 is an explanatory view of the arrangement of a conventional disc guide. 11 …… Cam gear, 40 …… Support wheel, 41 …… Clamper, 42 …… Disc guide, 56 …… Swing arm, 70 …… Cam, 171 …… Follower arm, 174 …… Cam follower, 79 …… Compression spring.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kiyoto Kajiwara Kiyoto Kajiwara 25-1 Nishimachi, Yamada, Kawagoe City, Saitama Prefecture Pioneer Corporation Kawagoe Factory (56) Reference JP-A-61-59660 (JP, A) Special Kai 63-217561 (JP, A)

Claims (1)

[Claims] 1. A magazine in which a plurality of discs are stored in a stacked state is inserted into a magazine storage unit, and a tray holding a desired disc is fed from the magazine by a tray transport mechanism into an information reproducing unit provided with a pickup or the like. In a disc reproducing apparatus that reproduces information on the disc by clamping the disc with a support wheel and a clamper of a spindle while guiding the upper surface of the disc with the disc guide and reproducing the information on the disc. A disc reproducing apparatus, which is installed outside and inside a lead-in area where disc information is not recorded.