JPH0527843U - Disk player - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose is to reduce the depth of the main chassis and to raise and lower the sub chassis smoothly. [Structure] The main chassis 4 is provided with a cam gear 5 in which a spiral cam groove 51 is formed. A turntable 10, a pickup 11, a pickup carriage 12 and the like are mounted on the sub-chassis 8 and pins 9 which engage with the cam grooves 51 are arranged. Then, the sub chassis 8 moves up and down by the rotation of the cam gear 5.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a disc player that reads information recorded on an information recording disc with a pickup.

[0002]

[Prior Art]

 Conventionally, a device capable of continuously reproducing a disc having information recorded on both sides with a single pickup is disclosed in, for example, JP-A-62-287476 (G11B 21/02) and JP-A-63-288476. It is disclosed in the official gazette (G11B 21/02) and the like.

By the way, in the conventional disc player, the turntable and the pickup are in the retracted position, that is, the lowered position before the disc is mounted, and after the disc is mounted, they are raised to clamp the disc and the pickup faces the disc. Therefore, it is necessary to make the sub-chassis on which the turntable, the pickup, and the pickup moving means are placed movable up and down with respect to the main chassis. A rack plate that slides horizontally with respect to the main chassis is provided for this elevating and lowering, and a pin provided on the sub chassis is engaged with a cam groove formed on the rack plate to move the rack plate in a predetermined horizontal direction. It was realized by sliding the stroke of.

[0004]

[Problems to be solved by the device]

 However, the lifting mechanism requires a stroke for sliding the rack plate, which hinders downsizing of the device.

The present invention has been made in view of the above points, and provides a disc player that does not require a horizontal slide stroke to move up and down a subchassis and can be downsized.

[0006]

[Means for Solving the Problems]

 According to the present invention, a disc tray for carrying a disc, a disc tray moving means for moving the disc tray, a turntable on which the disc is placed and integrally rotated, and a pickup for reproducing a signal from the disc. A pickup moving means for moving the pickup in the radial direction of the disc, a sub-chassis on which the turntable, the pickup and the pickup moving means are mounted, and a main chassis for supporting the sub-chassis so as to be able to move up and down. In the disc player, a cam gear having a spiral cam groove is arranged on the main chassis, a pin engaging with the cam groove is arranged on the sub chassis, and the sub chassis is driven by driving the cam gear. A disc player that can be raised and lowered Is.

[0007]

[Action]

 In the present invention, the sub chassis moves up and down by rotating the cam gear of the main chassis.

[0008]

【Example】

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

FIG. 1 is a perspective view of a main part of the apparatus of this embodiment, and FIG. 2 is a side view of the same before insertion of a tray. In the figure, 1 is a disc, 2 is a tray on which the disc 1 is placed and moves horizontally, 3 is a loading motor for driving the tray 2, 4 is a main chassis on which the tray 2 and the loading motor 3 are placed. Numerals 5 and 5 are a pair of cam gears arranged on the side plates of the main chassis 4 and formed with spiral cam grooves 51 whose diameters gradually increase. 6 is a drive gear for driving this cam gear, and 7 is a belt connecting both cam gears. Further, cut grooves 41 and 41 are formed in the vertical direction at positions facing the cam gears of the main chassis.

Reference numeral 8 denotes a sub-chassis supported by the main chassis 4 so as to be able to move up and down, and is provided with pins 9 and 9 which engage with the cam grooves 51 and 51 via the cut grooves 41 and 41. A turntable 10 is mounted on the sub-chassis and holds the disk 1 in cooperation with a clamp 16, a pickup 11 is provided, and a pickup carriage 12 is provided with the pick-up 11 and a drive mechanism 13 containing a motor. Reference numeral 14 is a guide pole for movably supporting the pickup carriage 12 in the radial direction of the disc, and reference numerals 15 and 15 are guide rails for guiding the pickup carriage 12 so as to face both sides of the disc 1 for double-sided reproduction. And, a rack that meshes with the gear of the drive mechanism is formed on the inner surface. The pick-up carriage 12, the guide pole 14, and the guide rails 15 and 15 are all mounted on the sub chassis 8.

Next, the operation of the apparatus of this embodiment will be described with reference to FIGS.

First, before the tray is inserted, the tray 2 is in the released state as shown in FIG. 2, and the disc 1 can be attached and detached. In this state, the pin 9 of the sub-chassis 8 is located in the small diameter portion of the cam groove 51, so that the sub-chassis 8 is in the lowered position. Therefore, the turntable 10 and the pickup 11 are retracted.

Next, when the tray 2 is slightly pushed in by hand in this state, a loading switch (not shown) is turned on and the loading motor 3 is energized. Then, the tray 2 moves to the right and stops at the position shown in FIG.

Further, from this state, the drive gear 6 rotates, and the cam gears 5 and 5 rotate counterclockwise. As a result, the pins 9, 9 are guided upward along the kerf 41. Accordingly, the sub chassis 8 rises and stops at the position shown in FIG. In this position, the turntable 10 holds the disc 1 together with the clamp 16 and the pick-up 11 faces the lower surface of the disc 1.

In this state, the pickup carriage 12 can move in the radial direction of the disc 1.

[0016]

[Effect of the device]

 As described above, according to the present invention, since it is not necessary to provide the main chassis with the rack plate that slides a predetermined stroke in the horizontal direction, the depth of the device can be reduced.

Further, since the cam groove of the cam gear has a shape in which the diameter is sequentially changed, the sub-chassis ascending / descending operation can be performed extremely smoothly.

[Brief description of drawings]

FIG. 1 is a perspective view of a disc player according to an embodiment of the present invention.

FIG. 2 is a side view of the disc player according to the embodiment of the present invention before the tray is inserted.

FIG. 3 is a side view of the disc player according to the embodiment of the present invention after the tray is inserted.

FIG. 4 is a side view of the disc player in a reproducing state according to an embodiment of the present invention.

[Explanation of symbols]

 1 Disc 2 Tray 4 Main Chassis 5 Cam Gear 51, 51 Cam Groove 8 Sub Chassis 9, 9 Pin 10 Turntable 11 Pickup 12 Pickup Carriage 16 Clamp

Claims (1)

[Scope of utility model registration request] 1. A disc tray for carrying a disc, a disc tray moving means for moving the disc tray, a turntable on which the disc is placed and integrally rotated, and a pickup for reproducing a signal from the disc. A pickup moving means for moving the pickup in the radial direction of the disc, a sub-chassis on which the turntable, the pickup and the pickup moving means are mounted, and a main chassis for supporting the sub-chassis so as to be able to move up and down. In a disc player, a cam gear having a spiral cam groove is arranged on the main chassis, a pin engaging with the cam groove is arranged on the sub chassis, and the sub chassis is moved up and down by driving the cam gear. A disc player characterized in that