JPH0422475Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a switching mechanism for switching between a loading motor and a turntable motor in a compact disc player.

<Prior Art and its Problems> A compact disc player (hereinafter simply referred to as a CD player) is a device in which a disc on which information is recorded is held on a turntable, and the information is reproduced by a pick-up mechanism.

Usually, the disks stored in the tray are transported to the turntable and then ejected. A so-called loading drive is performed, and then a turntable drive that rotates the disk on the turntable is started. This loading drive is performed by a loading motor, and it is necessary to smoothly start the turntable drive when the conveyance ends, and stop the turntable drive when the discharge starts. That is, there is a need for a switching mechanism that allows the loading motor to easily and smoothly switch between forward and reverse rotation.

<Means for Solving the Problems> The present invention was devised in response to the above-mentioned demands, in which a drive member having a switching lever and a protrusion is supported on the lower surface of the chassis table, and this protrusion is attached to the chassis table. The drive member is rotated by bringing the protrusion and contact side formed inside the tray into contact with the protrusion, and the switching lever presses and releases the operating rod of the motor switch. This is a switch mechanism that switches the loading motor between forward and reverse rotation.

<Example> The present invention will be explained in detail below based on the drawings.

FIG. 1 is a schematic perspective view of the CD player 1. FIG.
This CD player 1 slides a tray 30 on a chassis table 20 via a loading motor, and transports a disk in a disk storage section 31 provided on the upper surface of the tray 30 to a turntable 40. The transported disk is held by a clamper 42 provided at the tip of an arm 41, and is rotated by the rotation of a turntable 40 to reproduce information via a pickup mechanism.

FIG. 2 is a plan view showing the chassis table 20. A loading motor M1 is attached to the lower part of the chassis table 20, and the rotational drive of the loading motor M1 is transmitted to a loading gear m3 via a pulley m1, an idler m2, and the like. On the other hand, at the bottom of the turntable 40 is a turntable motor M for rotating the disk.
2 is provided. Switching between forward and reverse rotation of the loading motor M1 is performed by switches sw1 and sw2, which are arranged opposite to each other. As shown in the partially cutaway perspective view of FIG. 3, a drive member 50 for pressing and releasing the operating rods of the pair of switches sw1 and sw2 is supported on the lower surface of the chassis table 20. As shown in the perspective view of FIG. 4, the drive member 50 moves the switching lever 5 around the bearing part 51.
2, and a protrusion 53 located at a position substantially perpendicular to the switching lever 52. Moreover, a coil spring or the like (not shown) is interposed in the bearing portion 51 so that the switching lever 52 is disposed at an intermediate position between the switches sw1 and sw2. As shown in FIGS. 2 and 3, the protrusion 53 protrudes from the upper surface of the chassis table 20, and the protrusion 53 of the tray 30, which will be described later, and the contact side 6 are attached to the protrusion 53.
3 abuts against each other, the drive member 50 rotates around the bearing portion 51, and the switching lever 52 is moved.

In both movable directions of the switching lever 52, switches sw1 and sw2 are disposed facing each other via the printed circuit board PL, as shown in FIG.

FIG. 5 is an explanatory diagram showing the inside of the tray 30. A movable plate 60 is provided inside the tray 30. This movable plate 60 is connected to the long grooves 61, 61 through the screws 32, 32 fixed to the tray 30.
along the same direction as the tray 30. That is, a loading gear m3 is engaged with a rack 62 provided on one side of the movable plate 60, and the movable plate 60 is moved in and out together with the tray 30 by activation of the loading motor M1. Further, contact sides 63 are formed on the sides of the movable plate 60, and protrusions 70 are formed on the inner surface of the tray 30, and the contact sides 63 and the protrusions 70 are formed as shown in FIGS. 6 and 7. The drive member 5 comes into contact with the protrusion 53 of the drive member 50 .
0 around its axis P, and the switching lever 52
move in a predetermined direction.

Next, the switching operation by the switch mechanism will be explained.

When the tray 30 is in the ejected state, the protruding piece 70 rotates the drive member 50 in the direction of the arrow as shown in FIG. 6, and when the switching lever 52 turns on the switch sw2, the loading motor M1 rotates. On the other hand, when the tray 30 transports a disk, the contact side 63 rotates the drive member 50 by sliding the movable plate 60 as shown in FIG.
stop the rotation.

<Effects> As described above, the motor changeover switch mechanism of the present invention rotates the driving members in opposite directions during tray loading operation, thereby switching between a pair of opposing switches using the changeover lever to perform loading. Since the motor can be switched between forward and reverse rotation, it is possible to provide a CD player with extremely smooth loading operation.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the CD player, Fig. 2 is a schematic plan view showing the chassis table, Fig. 3 is a partially cutaway perspective view illustrating the mounting state of the drive member, and Fig. 4 is the drive member. FIG. 5 is an explanatory diagram showing the inside of the tray; FIG. 6 is an explanatory diagram of the switching operation of the switch when the tray is ejected; FIG. 7 is an explanatory diagram of the switching operation when the tray is transported;
FIG. 4 is an explanatory diagram of the switching operation of the switch. 1... CD player, 20... Chassis table, 30... Tray, 40... Turntable,
50... Drive member, 51... Bearing, 52... Projection, 53... Switching lever, 60... Movable plate, 6
3...Abutting side, 70...Protruding piece, sw1, sw2...
Switch, M1...Loading motor, M2...
...Turntable motor.

Claims (1)

[Claims for Utility Model Registration] (1) A CD player that slides a tray 30 on a chassis table 20 and holds a disc placed on the tray 30 on a turntable 40, comprising a switching lever 52 and a projection. A drive member 50 having a drive member 53 is rotatably supported on the lower surface of the chassis table 20 with the protrusion 53 protruding from the upper surface of the chassis table 20, and the drive member 50 has a contact edge 63 formed on the side of the tray 30 or By bringing the protrusion 70 formed inside into contact with the protrusion 53, the switching lever 52 is rotated to switch between normal rotation and reverse rotation of the loading motor M1.
CD player motor changeover switch mechanism. (2) A motor for a CD player according to claim 1 of the utility model registration claim, characterized in that a pair of switches sw1 and sw2 are disposed facing each other in both rotational directions of the switching lever 52. Changeover switch mechanism.