CN1242863A - CD changer with driving mechanism operated by single driving source - Google Patents

Abstract

CD changer having a simple driving mechanism is disclosed which is driven by a single driving source for a movement of a tray and a lifting and lowering operation of a driving unit. Reduction gears rotate by a driving motor installed on a body, a main gear rotates by the rotation of the reduction gears. A pinion part rotates through the rotation of the main gear and moves a rack gear, thereby a tray moves. Also, a driving unit is lifted and lowered by the operation of a driving unit elevating means, resulting in reproducing a CD or stopping the operation of the CD's reproduction.

Description

Disc changer with drive mechanism operated by a single drive source

The present invention relates to a disc changer with a drive mechanism operated by a single drive source, and more particularly, to a disc changer with a simple drive mechanism for being pushed by a single motor A tray and drive assembly for a disc changer, whereby the tray is ejected from and loaded into a body, and the drive assembly is lifted and dropped.

Generally, a conventional disc changer selects one of the discs loaded therein, and reproduces information from the selected disc (hereinafter referred to as CD) by an optical pickup device.

A CD changer includes many components, as shown in FIGS. 1 and 2 . A tray 120 is movably mounted on a main body 100 . On the upper plane of the tray 120, a roulette 140 for placing a plurality of CDs is installed. The wheel 140 can rotate a predetermined angle according to an external output to select a predetermined CD. A chuck 160 for chucking the center of the selected CD under a playback mode is mounted on the upper side of the wheel 140 . A driving assembly 180 is mounted on the lower side of the chuck in the main body 100 . The drive unit 180 has an optical head (not shown) for reproducing information from a CD. To reproduce information from the selected CD, drive assembly 180 is lifted toward chuck 160 . The selected CD is clamped between the drive assembly 180 and the chuck 160 and rotated by a motor. The optical head reproduces the information from the selected CD.

Below the wheel 140, there is a tray feeder for ejecting the tray 120 from the main body 100 and for loading the tray into the main body 100; a drive assembly lifter for lifting and dropping the drive assembly 180; and a The wheel drive member is used to rotate the wheel 140 . The tray feeder includes a rack 216, a feed motor 230, a reduction gear 250, a feed gear 270 and a toggle switch. The rack 210 has a predetermined length and is installed at one side of the bottom surface of the tray 120 . The feed motor 230 may provide a driving force for pushing the tray 120 . The reduction gear unit 250 transmits the driving force of the feed motor 230 to the feed gear 270 . The feed gear 270 is engaged with the rack 210 and feeds the tray 120 according to the rotation of the feed motor 230 . The toggle switch 290 is switched by a push portion formed on the feed gear 270 according to the position of the tray 120 . Feed motor 230 is controlled according to the state of toggle switch 290 .

The drive assembly lifter has a lift motor 310 for providing power to lift and drop the drive assembly 180; a drive gear 330 engaged with the lift motor 310; a cylindrical cam 350 engaged with the drive gear 300; and A second toggle switch 370 is installed at one side of the cylindrical cam 350 . A plurality of threads are formed on the periphery of cylindrical cam 350 and engage with protrusions (not shown) protruding from one side of drive assembly 180 . The toggle switch detects the lifting position of the driving assembly 180 according to the rotation of the cylindrical cam 350 and controls the lifting motor 310 . The other side of the driving assembly 180 is connected to the main body 100 by a hinge portion.

The wheel drive has a wheel motor 147 for providing power to rotate the wheel 140 and engages with a wheel gear 145 formed at the bottom surface of the wheel 140 .

A conventional CD changer as described above operates as follows.

First, in the eject mode, a control member (not shown) rotates the feeding motor 230 in a counterclockwise direction according to an eject signal from the outside. The driving force of the feed motor 230 is transmitted to the reduction gear unit 250 by a belt. The feed gear 270 rotates in the counterclockwise direction due to the reduction gear 250 , and meshes with the rack 210 . Thus, the tray 120 is ejected from the main body 100 . That is, the wheel 140 is also ejected from the main body 100 . The push portion 275 opens the toggle switch 290 when the feed gear 270 is turning in an arc of 360 degrees. An open signal of toggle switch 290 is provided to the control. The control commands the feed motor 230 to stop. A user can place many CDs on the roulette 140 mounted at the tray 120 .

Next, execute the loading mode. The loading mode is to load the roulette 140 and the tray 120 with many CDs into the inner space of the main body 100 . The loading mode is started by providing a loading signal to the control from the outside or by gently pushing the tray 120 into the inner space of the main body 100 . The push portion 275 can switch the toggle switch 290 to an off state. The control member can activate the feed motor 230 to rotate in the clockwise direction according to the OFF signal of the toggle switch 290 . According to the clockwise rotation of the feed motor 230 , the feed gear 270 rotates in the clockwise direction and starts meshing with the rack 210 . Accordingly, the tray 120 moves in the horizontal direction and is loaded toward the inner space of the main body 100 .

After completing the loading mode, the tray 120 is placed on top of the drive assembly 180 and the wheel 140 is placed under the chuck 160 . When a CD selection signal is supplied to the control, the control activates the wheel motor 147 . The roulette motor 147 turns the roulette gear 145 . The roulette 140 is rotated by the roulette gear 145, and then a predetermined CD is selected. The selected CD is placed between the drive assembly 180 and the chuck 160 .

When a play mode signal is provided to the control part, the control part activates the lifting motor 310 to rotate. The driving force of the lifting motor 310 is transmitted to the cylindrical cam 350 via the driving gear 330 . When the spur gear 350 rotates, the drive assembly 180 engaged with the spur cam 350 is lifted around a hinge pin. As the drive assembly 180 is raised, the selected CD is clamped between the chuck 160 and the drive assembly 180 . The chucked CD is rotated by a motor (not shown), and the optical head reproduces information from the selected CD.

However, a common CD changer has a feed motor for feeding the tray and a lift motor for lifting the drive assembly, respectively. That is, a CD receiving portion is slightly shaken due to the rotation of some motors, so that the CD changer is less reliable in reproducing the original sound.

Additionally, typical CD changers are complex because of the many gears meshing between the feed motor and the tray or between the lift motor and the drive assembly. Therefore, many structural members and assembly processes are required, increasing the manufacturing cost.

A primary object of the present invention is to provide a CD changer with a drive mechanism operated by a single drive source, wherein a tray and a drive assembly are driven by a single motor.

A second object of the present invention is to provide a CD changer with a drive mechanism operated by a single drive source to eliminate complicated vibrations due to use of allowable motors.

A third object of the present invention is to provide a CD changer with a drive mechanism operated by a single drive source to achieve low manufacturing cost.

To achieve these objects, a CD changer with a drive mechanism operated by a single drive source includes: a roulette, having a plurality of disc loading portions, for accommodating a plurality of discs; a rack-and-pinion arrangement and a receiving groove in the inner underside of the tray, and can be ejected and loaded; position and a drop position for suspending the playback operation, and have some protruding ribs at both ends of the drive assembly side walls for lifting and dropping operations; a drive motor for actuating the tray Ejection operation and loading operation, and used to activate the lifting operation and lowering operation of the drive assembly; a power transmission member, which transmits power from the drive motor; a main gear member, which is rotated by the power transmission member, integrated on the lower surface A first half gear is made, and is rotatably mounted on the main body through a central shaft; the pinion gear part has a lower gear meshed with the main gear part and a central shaft movable along the receiving groove, And push and engage with the rack gear of the pinion part by the rotation of the lower gear integrally made on the lower part of the pinion part; a connecting plate connecting the center shaft of the main gear part and the center shaft of the pinion part so as to limit circular motion of the pinion gear member; and a drive unit lifting device for lifting and lowering the drive unit by rotational force transmitted from the main gear member.

The groove is made into a U shape with a curved runway and a straight runway.

The rack is made into a U shape with a curved runway and a straight runway.

The power transmission member includes a driving gear member rotated by the driving force transmitted from the driving motor, and a relay gear member engaged with the driving gear member and integrally formed as an upper gear on the upper surface.

The drive assembly lifting device includes a connecting rod, which is rotatably mounted on the main body through a pivot, and has a first arm and a second arm integrally formed into a protrusion; a cam gear member, which has a The second half gear meshing with the first half gear of the main gear member, and a guide rail are made at the rear surface of the cam gear member with a helical shape and guide the protrusion of the second arm so that the linkage A first arm and a second arm are pivotable; a first lever and a second lever have slide slots in which the protruding ribs of the drive assembly slide to be lifted and lowered, and respectively a first arm and a second arm connected to the link; and two guide members guiding the first lever and the second lever and having slots formed on both ends thereof in the vertical direction.

In a second preferred embodiment of the present invention, the drive assembly lifting device includes a link rotatably mounted on the main body via a pivot, having a first arm and a second arm, and on a central side the wall is integrally formed with a half-gear meshing with the first half-gear of the main gear member; a first lever and a second lever having sliding slots in which the protruding ribs of the drive assembly slide, so as to be lifted and lowered, and respectively connected to the first arm and the second arm of the link; Slots are made on both ends thereof.

A CD changer with a drive mechanism operated by a single drive source according to a third preferred embodiment of the present invention includes: a roulette having a plurality of disc accommodating portions for accommodating a plurality of discs; a tray having A U-shaped rack and a U-shaped storage groove made in the inner underside of the tray, with a curved runway and a straight runway, and can be ejected and loaded; a drive assembly, lifted It is raised and dropped between a raised position for disc playback operation and a lowered position for suspending playback operation, and has some protruding ribs at both ends of the side walls of the drive assembly for lifting raising and lowering operations; a driving motor for performing ejection and loading operations of the tray, and for performing lifting and lowering operations of the driving unit; a driving gear member rotated by a driving force transmitted from the driving motor; a relay gear member meshed with the drive gear member and integrally formed on the upper surface with an upper gear having a smaller radius; a main gear member meshed with the upper gear of the relay gear member and passed through a central shaft Rotatably mounted on the main body; the pinion gear part has a lower gear meshed with the main gear part and a central shaft that can move along the receiving groove, and is integrally made on the lower part of the pinion gear part The rotation of the lower gear pushes and meshes with the rack of the pinion; a connecting plate connects the central axis of the main gear with the central axis of the pinion to limit the circular motion of the pinion, extending one end of the connecting plate to forming a sector and having a half-gear formed into a series of teeth at the peripheral wall of its arc; a drive assembly lifting device that lifts and lowers the drive assembly by rotational force transmitted from the main gear member, wherein The drive assembly lifter includes a link pivotally mounted on the main body, having a first arm and a second arm integrally formed at a central side wall to engage the joint half gears of the half gears of the plate; a first lever and a second lever having slide slots in which the protruding ribs of the drive assembly slide to be lifted and lowered and connected to the links respectively a first arm and a second arm; and two guide members for guiding the first lever and the second lever and having slits formed on both ends thereof in the vertical direction.

In the case of the CD changer described above, a single motor drives the ejection and loading of the tray from and into the main body and the lifting and lowering of the drive assembly.

Therefore, according to the present invention, a driving mechanism in which a single motor drives a tray and a driving assembly can prevent the complex vibration of the CD changer due to the use of two motors and achieve low manufacturing cost.

As a result, according to the present invention, the driving mechanism of a tray and a driving assembly driven by a single motor improves the stability and reliability of the optical player's operating conditions by eliminating many gear connections.

The present invention will be better understood from the following description in conjunction with the accompanying drawings, and its various purposes and advantages will also be more fully understood. In the accompanying drawings:

Fig. 1 is a perspective view showing a conventional CD changer;

Fig. 2 is a plan view, schematically shows a kind of common CD changer;

Fig. 3 is a schematic view showing a driving mechanism of a CD changer according to the first preferred embodiment of the present invention, wherein a tray is installed in the main body of the CD changer and a drive assembly is dropped;

Fig. 4 is a schematic view showing the drive mechanism of the CD changer according to the first preferred embodiment of the present invention, wherein the tray is ejected from the CD changer main body and the drive assembly is dropped;

5 is a schematic view showing the drive mechanism of the CD changer according to the first preferred embodiment of the present invention, wherein the tray is housed in the main body of the CD changer and the drive assembly is lifted;

6 is a schematic view showing the drive mechanism of the CD changer according to the first preferred embodiment of the present invention, wherein the tray is ejected from the CD changer main body and the drive assembly is lifted;

Fig. 7 is a sectional view of the drive mechanism in the CD changer shown in Fig. 3;

8A and 8B are schematic diagrams showing the operating conditions of a first operating lever and a second operating lever according to a first preferred embodiment of the present invention, and some protruding ribs made on the driving assembly when the driving assembly is lifted. movement in the up-and-down mode;

Fig. 9 is a schematic view showing the drive mechanism of the CD changer according to the second preferred embodiment of the present invention, wherein a tray is housed in the main body of the CD changer and a drive assembly is dropped;

Fig. 10 is a schematic view showing the drive mechanism of the CD changer according to the second preferred embodiment of the present invention, wherein the tray is ejected from the CD changer main body and the drive assembly is dropped;

11 is a schematic view showing a drive mechanism of a CD changer according to a second preferred embodiment of the present invention, wherein the tray is housed in the main body of the CD changer and the drive assembly is lifted;

Fig. 12 is a schematic diagram showing the drive mechanism of the CD changer according to the second preferred embodiment of the present invention, wherein the tray is ejected from the CD changer main body and the drive assembly is lifted;

Fig. 13A and Fig. 13B are schematic diagrams, show according to the second preferred embodiment of the present invention a first operating lever and a second operating condition of operating lever, and make some protruding ribs on the driving assembly in the driving assembly Movement conditions in lift-up and drop-down modes;

14 is a schematic diagram showing a drive mechanism of a CD changer according to a third preferred embodiment of the present invention, wherein a tray is housed in the CD changer main body and a drive assembly is dropped;

Fig. 15 is a schematic view showing the drive unit of the CD changer according to the third preferred embodiment of the present invention, wherein the tray is ejected from the CD changer main body and the drive assembly is dropped;

16 is a schematic diagram showing a drive mechanism of a CD changer according to a third preferred embodiment of the present invention, wherein the tray is housed in the main body of the CD changer and the drive assembly is lifted;

FIG. 17 is a schematic view showing a drive mechanism of a CD changer according to a third preferred embodiment of the present invention, wherein the tray is ejected from the CD changer main body and the drive assembly is lifted.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The same components in the various drawings will be designated by the same reference number, and the same reference number will never be used to designate different components.

Referring to Fig. 3 to Fig. 8B, the first preferred embodiment according to the present invention will be described in detail.

According to the present invention, a tray 210 has a U-shaped rack and pinion and a U-shaped receiving groove formed on the inner lower side of the tray. A drive assembly can be raised and lowered between a raised position and a lowered position. A single driving motor 10 generates driving force, and this driving force is transmitted to a power transmission member. The power transmission unit includes a drive gear 20 and a relay gear 30 . The drive gear member 20 is rotated by the drive motor 10 mounted on the main body 200 of the CD changer. The relay gear member 30 has a small radius upper gear 32 for increasing rotational force on an upper surface thereof. A main gear member 40 meshes with the upper gear 32 of the relay gear member and integrally forms a first half gear 44 on the lower surface. The pinion gear member 50 engages with the rack gear 12 and has a lower gear engaged with the main gear member 40 . In addition, a drive unit lifting device can lift and drop the drive unit by rotation of the main gear member 40 .

The receiving groove 14 is made U-shaped at the underside inside the tray.

The rack 12 is made U-shaped, with a curved track, on which the pinion 50 moves circularly along the groove 14, and a straight track, the pinion 50 rotates to promote the rack 12.

A connecting plate 56 connects the central shaft 42 of the main gear 40 and the central shaft 54 of the pinion 50 .

Thus, on a curved track, the lower gear 52 of the pinion gear 50, when engaged with the main gear 40, rotates clockwise and along the receiving groove 14 around the central axis 42 of the main gear 60 in opposite directions. Movement in the clockwise direction.

On a straight track, the pinion member 50 can push the rack 12 because the circular motion of the connecting plate 56 is restricted.

The pinion gear member 50 has a small radius lower gear 52 on its lower surface and meshes with the main gear member 40 , resulting in a large rotational force being transmitted to the rack gear 12 .

The drive assembly lifter includes a linkage 70, a cam gear member 60, a first lever 75, a second lever 78, and guide members 79, 79'.

The link 70 is rotatably mounted on the main body 200 via a pivot 74 and has a first arm 71 and a second arm 72 integrally forming a protrusion 73 .

The cam gear member 60 has a second half gear 62 engaged with the first half gear 44 of the main gear member 40 , and a guide rail 64 formed at a rear surface of the cam gear member 60 . This guide, which has a helical shape, guides the protrusion 73 of the second arm 72 so that the first arm 71 and the second arm of the linkage can turn around the pivot 74 .

The first operating lever 75 and the second operating lever 76 have slide grooves 78, 78' in which the protruding ribs 77, 77' of the driving assembly 80 can slide to be lifted and lowered, and are respectively connected to the second connecting rod. One arm 71 and the second arm 72 .

In addition, the two guide members 79, 79' can guide the first operating rod 75 and the second operating rod 76, and have respective slits formed at both ends thereof in the vertical direction.

Secondly, the present invention includes a tray opening detection switch (not shown), which detects the complete ejection of the tray from the main body by means of the contact rack 12, and a clamping completion switch (not shown), which detects the complete ejection of the tray by means of the first contact of the connecting rod. A joystick 75 and a second joystick 76 detect the chucking of the CD of the drive unit.

Hereinafter, the operation of the drive mechanism according to the first embodiment of the present invention will be described.

3 is a schematic view schematically showing a driving mechanism of a CD changer according to a first preferred embodiment of the present invention, wherein a tray is housed in the main body of the CD changer and a driving unit is dropped.

When the tray 210 housed in the main body 200 is ejected, the drive gear 20 is rotated counterclockwise by the drive motor, and then the relay gear 30 is rotated, and thus the upper gear 32 of the relay gear 30 rotates counterclockwise. Rotate the main gear member 40 in the direction. Due to the rotation of the main gear member 40 , the pinion gear member 50 and the lower gear 52 meshed with the main gear member 40 rotate in the clockwise direction. The pinion member 50 engages the straight track of the rack 12 and thereby pushes the rack 12 . Accordingly, the tray 210 is ejected toward the outside of the main body 200 .

When the central shaft 54 of the bottom gear 52 moved along the storage groove 14, in the curved track of the storage groove 14, the central shaft 54 had a circular motion, while in the straight track, the circular motion of the central shaft 54 was connected The connecting plate on the central axis 42 of the main gear member 40 is limited. Thus, in a straight race, the rotation of the pinion member 50 is transmitted to the rack 12, causing the rack 12 to move.

Furthermore, the cam gear member 60 does not rotate because the second half gear 62 does not mesh with the first half gear.

The drive mechanism in tray eject mode is shown in Figure 4.

After the user places many CDs on the roulette installed at the tray 210 , the tray 210 is gently pushed into the inside of the main body 200 . The drive motor 10 is operated by a control member (not shown), and the drive gear member 20 rotates in the clockwise direction due to the operation of the drive motor 10 . The driving gear member 20 rotates the pinion gear member 50 in the counterclockwise direction through the relay gear member 30 and the main gear member 40 . The pinion 50 is engaged with the rack 12 , and the tray 210 is placed inside the main body 100 . Accordingly, the CD placed on the wheel set in the tray 210 is mounted on the driving assembly 80 .

Second, the cam gear member 60 does not rotate because the second half gear does not mesh with the first half gear.

The drive mechanism in tray loading mode is shown in Figure 4.

When lifting the driving assembly 80 so as to play back a CD, as shown in FIG. turn. The driving gear member 20 rotates the pinion gear member 50 in the counterclockwise direction through the relay gear member 30 and the main gear member 40 . The pinion member 50 engages the curved raceway of the rack 12 . The pinion gear member causes a circular motion about the central axis of the main gear member 40 and thus moves into the left side of the main body 200 .

Second, because the main gear member 40 rotates in the clockwise direction, the first half gear 44 of the main gear member 40 meshes with the second half gear 62 of the cam gear member 60, causing the cam gear member 60 to rotate in a counterclockwise direction.

Due to the rotation of the cam gear member 60, the protrusion 73 of the link 70 moves along the track of the guide rail 64 toward the center of the spiral shape. Then, the first arm 71 and the second arm 72 rotate around the pivot 74 by a predetermined angle in the clockwise direction.

By the rotation of the first arm 71 and the second arm 72, the first operating rod 75 and the second operating rod 76 move in the horizontal direction. The protruding ribs 77, 77' of the drive assembly 80 move in the vertically upward direction along the respective slide grooves 78, 78' formed on the first lever 75 and the second lever 76, thereby lifting the drive assembly 80. .

The protruding ribs 77, 77' are supported by slots 90, 90' formed in the vertical direction on each guide member for guiding the horizontal movement of the first operating rod 75 and the second operating rod 76 .

The driving mechanism in which the tray 210 is placed inside the main body 200 and the driving assembly 80 is lifted is shown in FIG. 5 . In the above conditions, the CD can be played back.

The operation of dropping the drive assembly 80 to stop CD playback can be obtained by performing the above-described operation for CD playback in the reverse direction.

When ejecting the tray 210 out of the main body 200 so as to replace another CD while replaying the selected CD, as shown in FIG. The operation of the drive motor 10 rotates in the clockwise direction. The driving gear member 20 rotates the pinion gear member 50 in the counterclockwise direction through the relay gear member 30 and the main gear member 40 .

Because the central shaft 54 of the pinion 50 is located within the rectilinear track of the receiving groove 14, the circular movement of the central shaft 54 connected to the connecting plate 56 is restricted in the receiving groove. Then, as the pinion member 50 engaged with the rack 12 continues to rotate, the rack 12 moves in the horizontal direction, so that the tray 210 moves to the outside of the main body 200 .

Since the first half gear 44 of the main gear member 40 is not engaged with the second half gear 62 of the cam gear member 60, the cam gear member 60 does not rotate and thus the drive assembly 80 remains lifted (CD playback mode).

The drive mechanism in which the tray 210 is ejected from inside the main body 200 and the drive assembly 80 is lifted is shown in FIG. 6 .

When loading the tray 210 to the inside of the main body 200, as shown in FIG. . The driving gear member 20 rotates the pinion gear member 50 in the clockwise direction through the relay gear member 30 and the main gear member 40 . Accordingly, the rack 12 moves in the horizontal direction and the tray 210 is loaded into the main body 200 .

The drive mechanism in which the tray 210 is loaded into the main body 200 and the drive assembly 80 is lifted is shown in FIG. 5 .

FIG. 7 is a sectional view of the drive mechanism in the CD changer shown in FIG. 3 .

Figure 8A shows the situation when the driving assembly 60 is in the dropped position, wherein the protruding ribs 77, 77' of the driving assembly 60 are seated in the slide grooves 78, 78 made on the first lever 75 and the second lever 76 ' Lower part.

Figure 8B shows the situation when the drive assembly 60 is in the raised position, wherein the protruding ribs 77, 77' of the drive assembly 60 are seated in the slide grooves 78, 78 formed on the first lever 75 and the second lever 76. 78' upper.

Thus, the protruding ribs 77, 77' are moved along the sliding grooves 78, 78' by the action of the first and second operating levers.

Guide members 79, 79' for guiding the first and second levers are formed on the main body 200 and include slots 90, 90' for guiding and supporting the upper part along the sliding grooves 78, 78'. And the protruding ribs 77, 77' of the lower part.

Hereinafter, a second preferred embodiment according to the present invention will be described in detail with reference to FIGS. 9 to 13B.

In a driving assembly lifting device according to the second preferred embodiment of the present invention, a link 85 is rotatably mounted on the main body 200 through a pivot 84 and has a first arm 81 and a second arm 82 . In addition, the connecting rod 85 is integrally formed as a half gear 83 at a central side wall, meshing with the first half gear 44 of the main gear member 40 .

A first operating lever 75 and a second operating lever 76 have sliding grooves 88, 88' in which the protruding ribs 77, 77' of the driving assembly 80 slide to be lifted and lowered, and are respectively connected to the first arm levers 81 and the second boom 82.

In addition, the two guide members 79, 79' can guide the first operating rod 75 and the second operating rod 76, and have slits 90, 90' formed at both ends thereof in the vertical direction.

Figure 9 shows the drive assembly 80 in the dropped position.

The driving gear member 20 is rotated in the clockwise direction by the driving motor 10, and thus the relay gear member 30 is rotated in the counterclockwise direction. The main gear member 40 rotates clockwise due to the rotation of the relay gear member 30 , so that the first half gear 44 of the main gear member 40 meshes with the half gear 83 of the link 85 . Accordingly, the first arm 81 and the second arm 82 of the link 85 rotate around the pivot 84 by a predetermined angle in the counterclockwise direction.

By the rotation of the first arm and the second arm, the first joystick 75 and the second joystick 76 move in the horizontal direction. The protruding ribs 77, 77' of the drive assembly 80 are then moved into the upper portion along the slide grooves 88, 88' made on the first lever 75 and the second lever 76, causing the drive assembly 80 to be lifted.

The protruding ribs 77, 77' are guided and supported by slots 90, 90', each of which is formed vertically in the guide members 79, 79 for guiding the first operating rod 75 and the second operating rod 76. ' at both ends.

When the driving assembly 80 operates in the lifting mode, the pinion gear member 50 moves circularly along the receiving groove 14 by the clockwise rotation of the main gear member 40, thereby moving into the left side of the main body 200 (FIG. 11).

According to the above operation, the optical head device of the drive unit 80 can reproduce the information of the selected CD.

Second, the operation of the drop drive assembly 80 to suspend playback of the CD can be obtained by initiating the operation described above for playback in the reverse direction.

The description about the constitution and operation of the tray being ejected from and loaded into the main body is similar to that of the above-mentioned first embodiment.

Hereinafter, referring to FIGS. 14 to 17, a third preferred embodiment according to the present invention will be described in detail.

As shown in FIG. 14 , a connecting plate connects the central axis of the main gear and the central axis of the pinion to limit the circular motion of the pinion. The connecting plate stretches one end of the connecting plate to form a fan shape, and has a half gear formed as a series of gear teeth at the peripheral wall portion on one arc section thereof.

To play back the selected CD, the half gear 63 of the connecting plate 66 engages the half gear 83 of the linkage 85, thereby lifting the drive assembly 80 by operating the drive assembly lifter.

Next, the operation of the drop drive assembly 80 to suspend playback of the CD can be obtained by initiating the above-described operation for playback in the reverse direction.

Descriptions about the constitution and operation of each component are similar to those of the above-described embodiments.

As described above, the CD changer according to the present invention has a driving mechanism operated by a single driving source, and can efficiently perform ejection and loading operations of the tray and lifting and lowering operations of the driving unit.

As a result, the CD changer has a simple structure, and the number of components and assembly processes are reduced, achieving high productivity and low manufacturing cost.

While the invention has been particularly shown and described with reference to certain specific embodiments thereof, those skilled in the art will understand that various changes in form and details may be made therein without departing from the invention as defined by the appended claims. spirit and scope of the present invention.

Claims (7)

1. a CD Nisc changing device has the driving mechanism of being handled by a single drive source, comprising:

One pallet have a tooth bar and that is formed among the described pallet inner lower and put groove, and pallet can be ejected and be put into;

One driven unit is lifted and is used to end between the lowering position of replay operations by being fallen in a position and of lifting that is used for the CD replay operations, and has some outstanding floors of locating at the two ends of driven unit two side, to lift and to fall operation;

One CD-ROM drive motor is used to carry out the ejection operation of pallet and puts operation, and is used to carry out lifting operation and falling operation of driven unit;

One driven unit lifting gear is used to lift and fall driven unit; And

One cogwheel gearing is engaged in tooth bar so that eject or put pallet by means of the power of CD-ROM drive motor, and is engaged in a side of driven unit lifting gear so that lift and fall driven unit.

2. according to the described CD Nisc changing device that has the driving mechanism of the drive unit of being handled by a single drive source of claim 1, wherein cogwheel gearing comprises:

One driven wheel spare is made it to rotate by the driving force from the CD-ROM drive motor transmission;

One relay gear spare is engaged in driven wheel spare and makes a upper gear with being integral on upper face;

One main drive gear spare is made it to rotate by relay gear spare, makes the first half gears on lower surface, and is contained on the main body rotationally by a central shaft;

One pinion member, having a bottom gear and that is engaged in main drive gear spare can be along putting the central shaft that groove moves, and promotes to be engaged in the tooth bar of pinion member owing to the rotation that is formed in the undergear of pinion member bottom with being integral; And

A plate connects the central shaft of main drive gear spare and the central shaft of pinion member, so that the circular motion of restriction pinion member.

3. according to the described CD Nisc changing device that has the driving mechanism of handling by a single drive source of claim 1, wherein put groove and be made for a U font, have a crooked runway and a straight line runway.

4. according to the described CD Nisc changing device that has the driving mechanism of being handled by a single drive source of claim 1, its middle rack is made for a U font, has a crooked runway and a straight line runway.

5. according to the described CD Nisc changing device that has the driving mechanism of being handled by a single drive source of claim 1, wherein the driven unit lifting gear comprises:

One connecting rod is contained on the main body rotationally by a pivot, and makes second armed lever of a projection with having one first armed lever and 11 body;

One cam wheel spare, have one the second half gearing mesh and be formed in the guide rail at the posterior face place that has a spiral-shaped cam wheel spare in the first half gears and of main drive gear spare, it guides the projection of second armed lever, so that first armed lever of connecting rod and second armed lever can rotate around pivot;

One first operating rod and one second operating rod have some chutes, and the outstanding floor of each of driven unit slides therein so that be lifted and fall, and are connected to first armed lever and second armed lever of connecting rod; And

Two guide members are guided first operating rod and second operating rod, and make the line of rabbet joint along vertical direction on its two ends.

6. according to the described CD Nisc changing device that has the driving mechanism of being handled by a single drive source of claim 1, wherein the driven unit lifting gear comprises:

One connecting rod is contained on the main body rotationally by a pivot, has one first armed lever and one second armed lever, and makes half gear that is engaged in the first half gears of main drive gear spare in the center side-walls with being integral;

One first operating rod and one second operating rod have each chute, and the outstanding floor of each of driven unit slides therein so that be lifted and fallen, and are connected to first armed lever and second armed lever of connecting rod; And

Two guide members are guided first operating rod and second operating rod, and make the line of rabbet joint along vertical direction on its two ends.

7. CD Nisc changing device that has the driving mechanism of being handled by a single drive source comprises:

One pallet has the U-shaped that a U-shaped rack and pinion system and that is formed among the described pallet inner lower has a crooked runway and a straight line runway and puts groove;

One driven unit is lifted and falls in a position and of lifting that is used for the CD replay operations and is used to end between the lowering position of replay operations, and has some outstanding floors at the place, two ends of driven unit two side to lift and to fall operation;

One CD-ROM drive motor is used to start the ejection operation of pallet and puts operation, and is used to carry out lifting operation and falling operation of driven unit.

One driven wheel spare is made it to rotate by the driving force from the CD-ROM drive motor transmission;

One relay gear spare is engaged in driven wheel spare and makes a upper gear with being integral on upper face;

One main drive gear spare is engaged in the upper gear of relay gear spare, and is contained on the main body rotationally by a central shaft;

One pinion member, having a bottom gear and that is engaged in main drive gear spare can be along putting the central shaft that groove moves, and promotes to be engaged in the tooth bar of pinion wheel by means of being formed in the rotation of the undergear on the pinion member bottom with being integral;

A plate, connect the central shaft of main drive gear spare and the central shaft of pinion member, so that the circular motion of restriction pinion member, an end of extending web joint is fan-shaped to form, and has half gear that forms a series of gear teeth at the peripheral wall part place of one segmental arc;

One driven unit lifting gear is by lifting and fall driven unit from the rotating force of main drive gear spare transmission.

Wherein the driven unit lifting gear comprises a connecting rod, is contained in rotationally on the main body by a pivot, has first armed lever and second armed lever, and makes half gear that is engaged in half gear of web joint in a center side-walls with being integral;

One first operating rod and one second operating rod respectively have chute, and the outstanding floor of each of driven unit slides therein so that be lifted and fallen, and first armed lever and second armed lever that are connected to connecting rod; And

Two guide members are guided first operating rod and second operating rod, and make the line of rabbet joint along vertical direction on its two ends.

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