JPS634281Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a disc tray detection device for a compact disc player, which is used when a compact disc is mounted on a player body.

[Prior art]

POM type compact disc players, which belong to digital audio, have small discs and can store a large amount of information, so they can play continuously for long periods of time.

If a large number of compact discs are used for automatic performance, continuous performance for an even longer period of time is possible.
However, for this purpose, it is necessary to detect the moving state of the compact disk and perform various controls.

[Purpose of invention]

The object of the present invention is to provide a disc tray detection device for a compact disc player that detects the positions and moving directions of a large number of compact discs and enables automatic performance.

[Summary of the idea]

In the present invention, a first groove and a second groove are provided in a disk tray that accommodates a compact disk, and when the tray moves in one direction, the inclined surface of the first groove simply pushes down the movable contact, and when the tray moves in the opposite direction, the inclined surface of the first groove simply presses down the movable contact. The bent portions of the grooves laterally displace the movable contact so that different directions of movement of the compact disc can be detected.

[Example of idea]

FIG. 1 shows a player to which the present invention is applied. In this player, a player main body 12, a lifting device 14, and a carrier 16 are arranged adjacent to each other on a base 10.

In the elevating device 14, a plurality of disk trays 20 are accommodated in a tray box 18 in a multi-tiered manner, and are movable up and down to a predetermined height.
As shown in FIG. 2, this tray 20 is formed with a recess 22 in which a compact disk 24 is accommodated.

In the carrier 16, the tray 20 corresponding to the hook 26 is transferred from the tray box 18 to the player main body 1.
It is extruded in two directions and pushed between rubber rollers 28 and 30. This extruded tray 20
is placed on the player main body 12 by the guide device 32, and is in a playing state.

The detection device 34 is connected to the lifting device 14 and the player body 1.
2 and the first guide groove 3 formed on the back surface of the compact disk 24.
8 and a second guide groove 40.

The switch 36 has a movable contact 42 mounted on a bracket 44, as shown in FIGS. 3, 4 and 5.

More specifically, the movable bracket 48 is movable in a direction perpendicular to the moving direction of the tray 20 while being guided by a guide rod 46 that is stretched over the bracket 44, and a compression coil spring 50 is interposed between the movable bracket 48 and the bracket 44.
is biased horizontally. When the movable bracket 48 moves horizontally against the biasing force of the compression coil spring 50, the movable bracket 48 comes into contact with the contact 53 of the fixed switch 52 to turn on the fixed switch.

Further, the moving contact 42 supported by the moving bracket 48 has a vertical axis, and is supported by a compression coil spring 54.
is biased upward. Therefore, the moving contact 42
can be lowered against the biasing force of the compression coil spring 54, but in such a vertical movement, the fixed switch 5
2 will not be activated.

As shown in FIGS. 5 to 7, corresponding to the movable contact 42, the first guide groove 38 and the second guide groove 40 for the switch are carved on the back surface of the tray 20. The first guide groove 38 has an inclined bottom surface formed on the end surface of the tray 20 as shown in FIG. It has a bent portion displaced in a direction perpendicular to the direction of travel.

Therefore, when the tray 20 moves in the direction of the player body 12 (in the direction of arrow A), the switch 36 is fixed because the first guide groove 38 only moves the movable contact 42 downward in response to the movable contact 42. The switch 52 is not turned on, and when the tray 20 moves in the opposite direction, the second guide groove 40 moves the movable contact 42 in a direction perpendicular to the direction of movement in correspondence with the contact, and the fixed switch 52 is turned on.

In this way, it is possible to distinguish between the forward movement and the backward movement of the reciprocating movement of the tray 20, so each motor can be operated in accordance with the course of the tray 20.
Player body 12, lifting device 14, carrier 16
etc. can be operated only when necessary, and can be stopped at other times.

Next, the action will be explained.

When the lifting platform 14 stops at a predetermined height, the hook 48 of the carrier 16 is moved to the corresponding tray box 18.
Push out the tray 20 inside. Due to this extrusion, the first guide groove 38 of the tray 20 comes into contact with the contact 42 of the switch 36 and lowers the contact 42, but
Fixed switch 52 is not activated.

The tray 20, which has reached above the player body 12 by the rotation of the rubber rollers 28 and 30, is mounted onto the player body 12 by the guide device 32.
By operating a light pen (not shown), a signal on the back of the compact disc 24 is read and a performance is started.

After the performance, the guide device 32 and rubber roller 2
The tray 20 is inserted into the tray box 18 again by rotations 8 and 30. During this movement, the second guide groove 40 of the tray 20 moves the contactor 42 laterally, so that the fixed switch 12 is turned on. As a result, the hook 26 of the carrier 16 is actuated to draw the tray 20 into the tray box 18.

Thereafter, the lifting device 14 changes the height of the tray box 18, and another tray is ready for playing.

[Effect of idea]

In this way, the detection device 34 can distinguish and detect the reciprocating motion of the tray 20, so that it can send detection signals to drive parts such as various motors to enable continuous playing of the compact disc.

[Brief explanation of the drawing]

Fig. 1 is a front view of the player showing the application of the present invention, Fig. 2 is a perspective view showing the tray and disk, Fig. 3 is a view taken along the line in Fig. 1, Fig. 4 is a front view of the switch, and Fig. 5 is a front view of the player. The figure is a back view of the tray, and FIGS. 6 and 7 are cross-sectional views taken along the line-- and -- line in FIG. 5, respectively. 12... Player body, 34... Detection device, 3
6... Switch, 38... First guide groove, 40...
...Second guide groove, 42...Contactor.

Claims (1)

[Scope of utility model registration request] A first groove and a second groove are provided in a disk tray that accommodates a compact disk. A disk tray detection device for a compact disk player, characterized in that a bent portion is formed to laterally displace a movable contact.