JPH0363960A - Disk player - Google Patents

Abstract

PURPOSE:To eliminate the necessity of a special space for a sub chassis elevating means, to make a disk player compact, to reduce the number of parts and to lower manufacture cost by providing a guide groove to move a disk on a tray to a disk reproducing position by hanging up the disk by a sub chassis. CONSTITUTION:In a cam part 7b of a pinion 7 fitted to a main chassis 1, a guide groove 22 is provided in a special form and in a front edge on the upper surface of a sub chassis 13, a shift member 9 is provided with a guide pin 11 to be protruded on the pinion side and fitted into the guide groove 22. By rotationally driving the pinion 7 and guiding the guide pin 11 along the guide groove 22, the sub chassis 13 is vertically moved. In such a way, the sub chassis 13 is vertically moved while being interlocked with the back and forth move of a tray 19 with a rack 19a to be engaged with the pinion 7. Thus, the special space is not needed for the sub chassis elevating means and the disk player is made compact. Further, the disk player is obtained at low manufacture cost with the small number of parts.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application This invention relates to a disc player, and more specifically,
The present invention relates to an improvement in the loading mechanism of a disc player that reproduces information recorded on a disc-shaped recording medium (referred to as a "disc" in this specification) such as a compact disc or a laser disc.

(B) Prior Art Conventionally, front-loading disc players, in which discs are loaded and unloaded from the front, have been widely used because of their ease of operation and efficient use of space.

This type of disc player mainly consists of a horizontally arranged main chassis, a disc loading lid tray attached to the main chassis so as to be movable back and forth, and a tray attached to the main chassis on which discs are placed. It consists of a sub-chassis that lifts the disc on the tray to the playback position when it moves backward to a predetermined position.

As the means for moving the tray back and forth, a combination of a rack provided on one side of the tray and a pinion provided on the main chassis so as to mesh with the rack and driven by a pinion motor is used.

In such a disc player, when playing a disc, the disc is first placed on a predetermined position on the tray that is pulled out, and a loading button is pressed. Then, the pinion is rotated by the pinion motor,
By moving the rack that engages with this to the rear,
The tray moves backwards. Then, when the tray stops moving, the sub-chassis is raised by a lifting means such as a motor, and lifts the disc on the tray to the playback position. Next, the disk is rotated by a turntable attached to the subchassis, and the recorded information is reproduced.

On the other hand, when ejecting the disc after playback is finished, the user presses the unloading button. Then, the pinion rotates in the opposite direction to that during loading, and as the sub-chassis lowers and the tray moves forward, the tray comes forward to the disk loading/unloading position, allowing the disk to be removed.

(c) Problems to be Solved by the Invention In the above-mentioned disc player, since a subchassis lifting means such as a motor is used to raise and lower the subchassis, installation space is required and the player becomes large. In addition, there was a problem that the number of parts increased and the cost increased.

This invention was made in view of this situation,
It is an object of the present invention to provide a compact disc player that does not require a special space for a subchassis elevating means, has a small number of parts, and has a low manufacturing cost.

(d) Means for Solving the Problems and Their Effects This invention includes a disc loading tray that is attached to a horizontally arranged main chassis so as to be movable back and forth, and a tray that is pivotally supported at the rear end of the main chassis. a sub-chassis, a pinion rotatably attached to one side of the main chassis, having a disc-shaped gear part and a disc-shaped cam part concentric therewith, and rotatably driven to move the tray back and forth; and the pinion in the tray. A rack is provided at a location corresponding to the tray and engages with a pinion to move the tray back and forth, and further,
The sub-chassis includes a shift member attached to the front edge of the upper surface of the sub-chassis so as to protrude forward adjacent to the pinion, is pivotally supported on the main chassis at the front of the protrusion, and has a guide pin protruding toward the pinion at a predetermined position. , the cam part of the pinion horizontally guides the guide pin around the peripheral wall of the cam part in the early stage of the tray's backward movement, and guides it gradually upward from the horizontal around the peripheral wall in the latter stage of the backward movement, so that the guide pin This disc player is equipped with a guide groove for lifting and moving a disc to a disc playback position using a sub-chassis.

That is, in the disc player according to the present invention, instead of the conventional subchassis elevating means, a specially shaped guide groove is provided in the cam portion of the pinion attached to the main chassis, and a guide groove is provided on the front edge of the upper surface of the subchassis on the pinion side. A shift member is provided that has a guide pin that projects into the guide groove and fits into the guide groove. Then, the subchassis is raised and lowered by rotating the pinion and guiding the guide pin through the guide groove.

Thus, the subchassis moves up and down in conjunction with the back and forth movement of the tray, which has a rack that engages with the pinion.

(e) Example The present invention will be described in detail below based on an example shown in the drawings. Note that this invention is not limited to this.

1 to 9, the disc player P mainly includes a main chassis (loading chassis) 1 disposed horizontally, and a disc loading tray 19 attached to the main chassis 1 so as to be movable back and forth. , a sub-chassis (chassis with a built-in player mechanism) 13 that is attached to the main chassis l and lifts the disc on the tray 19 to the playback position when the tray 19 on which the disc (as shown) is placed moves backward to a predetermined position. ing.

On the front right side of the main chassis l, there is a pinion mounting shaft 21.
has been erected. A pinion 7 is attached to the pinion attachment shaft 2I with screws 8. The pinion 7 includes a large-diameter disk-shaped gear portion 7a, a small-diameter disk-shaped cam portion 7b provided concentrically with the gear portion 7a below the gear portion 7a, and a small-diameter disk-shaped cam portion 7b provided concentrically with the gear portion 7a below the cam portion 7b. It is composed of a cylindrical shaft mounting portion 7c provided therein. The pinion 7 is driven and rotated by a pinion motor (loading motor) 2 attached to the main shaft 1 with a screw 6. That is, the rotation of the pinion motor 2 is transmitted to the pinion 7 via the motor pulley 3, belt 5, and pinion pulley 4.

The gear J7a of the pinion 7 is mounted on the inner surface of the right side wall of the tray 19.
A plate-like rack 19a having a gear portion that meshes with the rack 19a is attached. And pinion 7 and rack 19
The tray 19 is moved forward and backward by a.

The sub-chassis 13 has a turntable 20 on the front top side.
It is pivoted to the main chassis l with two screws 17 and 17 at the rear. A steel plate is attached to the table surface of the turntable 20. Also, sub-chassis 13
A shift lever 9 as a shift member is attached to the front edge of the upper surface with two screws 18.

This shift lever 9 is adjacent to the left side of the pinion 7 and protrudes forward. Further, the shift lever 9 is attached to the front left side of the main chassis I with a screw lO, and is pivotally supported on the front part of the main chassis I by a front horizontal shaft 12. A guide pin 11 that projects horizontally toward the pinion 7 is provided behind the horizontal shaft 12 of the shift lever 9 .

A guide pin 11, which is a part of the shift lever 9, is fitted into a guide groove 22 provided in the cam portion 7b of the pinion 7. This guide groove 22 has a shape as shown in FIGS. 6 and 7.

The guide groove 22 moves the disc placed on the tray 19 to the lower surface of the disc holder 14 of the main chassis l, which is the reproduction position, via the sub-chassis 13.

That is, the guide groove 22 has a horizontal portion 22a and an inclined portion 22.
It consists of b. The horizontal portion 22a horizontally guides the tray 19 so that it moves above the turntable 20 without being obstructed by the tray 19 during the first half of its backward movement. The inclined portion 22b gradually guides the guide pin 11 upward so as to raise the turntable 20 and lift the disc from the tray 19 in the later stage of the backward movement of the tray 19.

Thus, as the pinion 7 rotates, the shift lever 9 rotates about the horizontal shaft 12 and the two screws 17, 17 as the front and rear rotation centers, respectively. This rotation causes the front portion of the sub-chassis I3 (the portion connected to the shift lever 9) to move up and down.

Note that a magnet 15 is fixed inside the disc holder 14. When the turntable 20, which is the - section of the sub-chassis 13, is raised, the disk is held between the steel plate on the table surface of the turntable 20 and the disk retainer I4/magnet 15.

Reference numeral 16 denotes a leaf switch, which performs ON-OFF' operation by a part of the protrusion of the pinion 7, and detects the IN/OUT of the tray 19 on which the disk is placed and moves back and forth.

The operation of this disc player P, especially the tray 19, will be explained below.
The backward movement of will be explained.

As shown in FIG. 8, when tray I9 is pulled out to the front and placed in the disc loading/unloading position, tray
The rack 19a is engaged with the gear portion 7a of the pinion 7. At this time, the guide pin 11 of the shift lever 9 is
It is located at the right end of the horizontal portion 22a of the guide groove 22 in the figure. Therefore, the front part of the sub-chassis 13 is lowered, and the tray 19 can move backward without getting caught on the turntable 20.

As shown in FIG. 9, a tray 19 on which a disc is placed
When the rack 19a of the tray 19 is located at the gearless portion 7d of the gear portion 7a of the pinion 7, the tray 19 will no longer go inside (the gears will no longer engage). At this time, the pinion 7 is engaged with the pinion pulley 4 at its narrow gear portion 7e (corresponding to the lower part of the gearless portion 7d of the gear portion 7a). Therefore, although the tray 19 does not move backward, the pinion 7 tries to continue rotating.

At this time, the guide pin 11 of the shift lever 9 is located at the left end of the horizontal portion 22a of the guide groove 22 in FIG. Therefore, the front part of the subchassis 13 is still lowered.

Since the pinion 7 continues to rotate further, the guide pin 11 rises to the left end of the inclined portion 22b of the guide groove 22 in FIG. Then, the fmK of the subchassis I3 is lifted up, and the turntable 20 and disc holder 14 are lifted up.
- The disk is held between the magnet 15. At the left end of the inclined portion 22b of the guide groove 22 as shown in FIG. 7, the leaf switch 16 turns ON and the pinion motor 2 stops rotating. This completes the loading operation.

The unloading operation of the tray 19 is the opposite of the above operation, and a description thereof will be omitted.

In this disc player P, the subchassis 13
can be moved up and down in response to the back and forth movement of the tray 19, and a motor or the like for raising and lowering the sub-chassis 13 is not required. Therefore, this disc player P has fewer components, is compact, and has low manufacturing costs.

(F) Effects of the Invention The present invention is configured as described above, and since the sub-chassis moves up and down in response to the back and forth movement of the tray, there is no need for a motor or the like to raise and lower the sub-chassis. Therefore, according to the present invention, there is no need for a special space for the subchassis elevating means, and it is possible to obtain a compact disk player with a small number of parts and a low manufacturing cost.

[Brief explanation of drawings]

1 to 9 show two embodiments of a disc player according to the present invention. That is, FIG. 1 is an exploded perspective view of the main parts of the disc player seen from above, FIG. 2 is an exploded perspective view of the main parts of the disc player seen from below, and FIG. 3 is a perspective view of the tray attached to the main chassis. Fig. 4 is an enlarged rear view of the pinion, Fig. 5 is an enlarged plan view of the pinion, Fig. 6 is an enlarged front view of the pinion, Fig. 7 is a developed view of the cam part of the pinion,
FIG. 8 is a perspective view of the main parts of the disc player when the tray is at the frontmost position, and FIG. 9 is a perspective view of the main parts of the disc player when the tray is at the rearmost position. 11... Guide pin, 12... Horizontal axis, 13... Sub chassis, 19... Tray, 19a... Rack, 20. ... Turntable, 22 ... Guide groove, 22a ... Horizontal part, 22b ... Inclined part. ■・・・Main chassis, 7...Pinion, 7a...Gear L7b...Cam part, 9...
·····shift lever

Claims (1)

[Claims] 1. A disk loading tray is attached to the horizontally arranged main chassis so that it can be moved back and forth, a sub-chassis is pivoted to the main chassis at the rear end, and a rotatable tray is attached to a part on one side of the main chassis. A pinion is attached to the tray and has a disc-shaped gear part and a disc-shaped cam part concentric with the disc-shaped gear part, and is rotatably driven for moving the tray back and forth.The pinion is provided at a position corresponding to the pinion on the tray and engages with the pinion to move the tray back and forth. and a rack for moving the sub-chassis, and the sub-chassis is attached to the front edge of its upper surface adjacent to the pinion in a forward protruding manner, is pivoted to the main chassis at the protruding front part, and protrudes toward the pinion at a predetermined location. The cam part of the pinion horizontally guides the guide pin around the circumferential wall of the cam part in the early stage of the tray's backward movement, and guides the guide pin horizontally around the peripheral wall in the latter stage of the backward movement of the tray. A disc player comprising a guide groove that guides the disc gradually upward and lifts and moves the disc on the tray to a disc playback position using a sub-chassis.