Height-determining method of an elevating device for a disc changer

Abstract

A height-determining method of an elevating device comprises following steps. Firstly, the disc changer determines whether a disc storage cartridge is inserted into the disc changer or not. Secondly, the CPU resets the elevating device in the case that the disc storage cartridge is inserted into the disc changer. Then, the CPU calculates each level height of the disc storage cartridge, and so the elevating device can move according to the calculated level heights.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The features, objects, and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiment of this invention, with reference to the accompanying drawings, in which:

FIG. 1 is a top view of a preferred elevating device in accordance with the present invention;

FIG. 2 is a front view of a preferred disc changer in accordance with the present invention;

FIG. 3 is a back view of the changer of FIG. 2; and

FIG. 4 is a flow chart illustrating the height-determining method of the elevating device in accordance with the present invention.

Claims

1. A height-determining method of an elevating device applied to a disc changer, said disc changer including a disc storage cartridge having plural levels, comprising: (a) determining whether said disc storage cartridge is inserted into said disc changer;(b) resetting the elevating device in the case that said disc storage cartridge is inserted into the changer;(c) calculating each level height of said levels of said disc storage cartridge; and(d) entering a normal working mode.

2. The height-determining method according to claim 1, wherein said step (b) further comprises: (b1) raising said elevating device to a top level of said disc storage cartridge;(b2) measuring an analog voltage;(b3) transforming the analog voltage into a digital voltage; and(b4) comparing the digital voltage with an anticipation height table provided in advance in said disc changer to get a new height table.

3. The height-determining method according to claim 2, wherein said new height table is performed by an arithmetic progression.

4. The height-determining method according to claim 2, wherein said step (b2) is performed by measuring an output value of a linear variable resistor in said disc changer.

5. The height-determining method according to claim 1, wherein said step (d) is to have said elevating device moved according to said level height.

6. A disc changer, used to insert a disc storage cartridge, comprising: an elevating device moved around plural levels of said disc storage cartridge; anda central processing unit (CPU), coupled to said robot device, wherein, when said disc storage cartridge is inserted into said disc changer, said CPU resets said elevating device to producing each correct level height of said levels of said disc storage cartridge.

7. The disc changer according to claim 6; further comprising a variable resistor, coupled to said elevating device and said CPU, an analog voltage of said variable resister being obtained according to a location of said elevating device.