JPH035017Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a loading mechanism for an apparatus that optically records and reproduces information.

2. Description of the Related Art Conventionally, an optical recording/reproducing apparatus having a tray 1 for transporting a disk as shown in FIG. 5 has been known. Conventionally, in such an apparatus, a micro switch has been used to detect that the transfer of the tray 1 has been completed. That is, as shown in FIG. 2, a micro switch 3 is installed on a chassis 2 of an optical recording/reproducing device, and when the tray 1 moves in the direction of the arrow, it comes into contact with the operating piece 4 of the micro switch 3, and the micro switch 3 is activated. The completion of transfer was detected by the closed state.

On the other hand, in a recording/reproducing device using laser light, the lighting conditions of the laser are determined by a mechanical component called a beam shutter and a micro switch 3 to prevent the laser light from leaking outside the device.

However, the amount of movement of the tray 1 varies widely depending on the individual devices, and it may not be possible to make appropriate contact with the micro switch 3, which has a small stroke, or conversely, the amount of movement of the tray 1 may not be able to make appropriate contact with the micro switch 3, which has a small stroke.
It had the drawback of destroying it. In addition, if the conductive state is maintained even after destruction, the recording/reproducing device may start operating, resulting in malfunction. Furthermore, in order to prevent the laser beam from leaking outside the device, it is necessary to use not only the micro switch 3 but also a beam shutter, which has the disadvantage of complicating the mechanism.

The present invention aims to solve the above-mentioned drawbacks and provide a loading mechanism that can reliably detect the end of movement of the tray 1.

The loading mechanism according to the present invention includes: a disk transfer means for transferring an information recording disk to a disk rotation means; a first conductive member provided on the transfer means; and a second conductive member that comes into contact with the conductive member.
It is configured to detect the end of disk transport by short-circuiting the first and second conductive members, and at the same time to control on/off of the light source.

The present invention will be explained below with reference to examples.

In Figure 2, tray 1 has a T-shaped cross section.
The character member 5 is slidably attached, and the spring 6
is biased toward the right in the figure. T-shaped member 5
As shown in FIG. 3A, a conductive rubber material 8 is provided in a layered manner on a non-conductive rubber material 7 on the head of the device. The chassis 2 is provided with a printed circuit board 9 made of paper phenol or the like. This printed circuit board 9 has a copper foil pattern 10 plated with gold as shown in FIG. 3B.
It is provided as shown in . The conductive rubber material 8 comes into contact with the copper foil pattern 10 as the tray 1 is transferred, and comes into contact with the copper foil pattern 10 only by the pressure of the spring 6 as the T-shaped member 5 slides. The spring pressure of the spring 6 and the sliding distance of the T-shaped member 5 are set so that this pressure becomes an appropriate pressure.

Copper foil pattern 10 provided on printed circuit board 9
One of them is connected to a power source as shown in FIGS. 4A and 4B, and the other is connected to a laser light source via a transistor 11. The transistor 11 is turned on and off to determine whether or not to supply power to the laser light source, and is controlled by the operation of the transistor 12 connected to the base of the transistor 11. A positive voltage or zero voltage is applied to the base of the transistor 12, and when a positive voltage is applied, the transistor 12 becomes conductive and the transistor 11 is turned off. When zero voltage is applied, transistor 12 becomes non-conductive and transistor 11 becomes on.

Next, the operation will be explained.

When the tray 1 is transferred and reaches the terminal end, the conductive rubber 8 and the copper foil pattern 10 come into contact, shorting the copper foil pattern 10. As a result, transistor 11
When the power supply voltage is supplied to the collector of the transistor 12 and the voltage supplied to the base of the transistor 12 is zero voltage, the transistor 11 is turned on and power is supplied to the laser light source to turn on the laser light source. The laser light source is turned off unless the copper foil pattern 10 is short-circuited and the transistor 11 is turned on. For example, when the tray 1 moves to the left in FIG. 4A and the conductive rubber material 8 separates from the copper foil pattern 10, the laser light source is turned off.

According to the loading mechanism of the present invention described above, the structure is simple and the end of transfer of the tray 1 can be reliably detected. Furthermore, even if the switch were to be destroyed, the copper foil patterns are separated, so it is safe because it does not maintain a conductive state. Further, an adjustment mechanism is not required at the time of installation, and moreover, it can be used both for on/off control of the laser light source and for detecting the end of transferring the tray 1.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing a conventional example, Figure 2 is a schematic diagram of the loading mechanism of the present invention, Figures 3 A and B are enlarged views showing the main parts of the loading mechanism of the present invention, and Figures 4 A and B. 5 is an explanatory view showing the loading operation of the present invention, and FIG. 5 is a perspective view showing a conventional example and one form of the present invention. 1... Tray, 8... Conductive rubber, 9... Printed circuit board, 10... Copper foil pattern.

Claims (1)

[Claims for Utility Model Registration] (1) A loading mechanism for an optical recording and reproducing device having a light source such as a laser, which comprises a disk transfer means for transferring an information recording disk to a disk rotation means, and a disk transfer means for transferring an information recording disk to a disk rotation means; The first provided
and a second conductive member that comes into contact with the first conductive member when the disk transfer is completed, and the disk transfer is completed by short-circuiting the first and second conductive members. What is claimed is: 1. A loading mechanism for an optical recording/reproducing device, characterized in that it simultaneously detects the light source and controls the on/off of the light source. (2) The first conductive member is connected to the second conductive member by a spring, etc.
A loading mechanism for an optical recording/reproducing device according to claim 1, wherein the loading mechanism is biased in the direction of the conductive member. (3) The loading mechanism for an optical recording/reproducing device according to claim 1, wherein the first conductive member is a conductive rubber. (4) A loading mechanism for an optical recording/reproducing device according to claim 1, wherein the second conductive member is a printed wiring board having a conductive pattern separated into two or more parts. .