KR100287299B1 - Single Motor Drive Structure of CD Changer - Google Patents

Abstract

The present invention provides a structure for operating the rotation of the roulette, the lifting and lowering of the drive unit, and the entry and exit of the tray by a single drive motor, thereby reducing the components and reducing the production cost.

The present invention for this purpose is a lifting chassis for elevating the drive unit 100 by moving horizontally by the planetary gear group 40 and the cam gear 60 and the cam gear 60, which is linked to the drive motor 32 ( 80) and the divided angle rotary gear 90 formed below the roulette 106, the first fixed gear 28 and the second fixed gear 29 meshed with the planetary gear group 40, and the planetary gear group 40 The drive structure is composed of the first bridge gear 22, the second bridge gear 24 and the rack gear 12 to be transferred, the planetary gear group 40 according to the rotation direction of the drive motor 32, the cam gear 60 Raise and lower the drive unit 100 or rotate the roulette 106, and meshes with the first bridge gear 22, the rack gear 12 and the second bridge gear 24 to the main body of the tray 30. Since it can be withdrawn from (10), only one drive motor 32 can be used to simplify the configuration and reduce the number of parts, thereby improving productivity.

Description

Single Motor Drive Structure of CD Changer

The present invention relates to a single motor drive structure of the CD changer, and in particular, it is possible to drive the rotation of the roulette and the lifting and lowering of the drive unit and the entry and exit of the tray with a single drive motor, thereby reducing the components and reducing the production cost. The single motor drive structure of the CD changer to reduce.

In general, a CD changer is a type of CD player that inserts a plurality of optical recording media (Compact Disk: hereinafter referred to as a 'CD') and selects one of the CDs to play with the optical pickup device. Device.

1 and 2, the CD changer is provided with a roulette 130 for placing a plurality of CDs 150, and the roulette 130 is installed so as to selectively rotate by a predetermined angle at the same time the main body 110 The drive unit 140 which slides into the inside of the tray 120 and is installed to be inserted or drawn out, and the optical unit is installed in the main body 110 to chuck and play the CD 150 placed in the roulette 130. Has a configuration that includes

Here, as shown in FIG. 2, the roulette 130 may be selectively rotated by a drive motor 132 installed on the tray 120 and a gear 134 rotating by the drive motor 132. . The tray 120 has a rack gear 122 formed on one side thereof, and the drive motor 124 is connected to the rack gear 122 by the drive motor 124 and the reduction gear unit 126 installed in the chassis 110. The tray 120 is inserted or withdrawn from the chassis 110 according to the rotation direction of the.

In addition, the drive unit 140 ascends by the rotation of the drive motor 142 and the reduction gear unit 144 in the regeneration mode to chuck the CD 150, and rotates the CD 150 by a separate motor provided therein. Play back the recording with the optical pickup device.

The operation of the conventional CD changer having such a configuration first rotates in the reduction gear unit 126 as the control circuit unit drives the drive motor 124 when ejecting the tray 120 for regeneration of the CD 150. The speed is constantly decelerated to transfer the rack gear 122 of the tray 120 at a low speed. By the transfer of the rack gear 122, the tray 120 and the roulette 130 provided on the tray 120 are horizontally transferred and drawn out from the chassis 110 to the outside. When the tray 120 is completely drawn out as described above, the toggle switch 128 is turned on to stop driving of the driving motor 124 in the control circuit unit, thereby completing the ejection of the tray 120.

As described above, when the plurality of CDs 150 are placed in the roulette 130 installed in the ejected tray 120 and the tray 120 is pushed, the tray 120 is inserted to turn off the toggle switch 128 in the control circuit unit. The drive motor 124 is redriven in the reverse direction by the off signal of the toggle switch 128, and the feed gears of the reduction gear unit 126 and the rack gear 122 engaged with the drive motor 124 are driven. The tray 120 is horizontally moved and inserted into the chassis 110.

As such, when the tray 120 is loaded, the tray 120 is positioned above the drive unit 140, and the CD 150 seated on the roulette 130 installed on the tray 120 is chucked to the drive unit 140. Will be in the position. In this case, when the CD to be reproduced is selected, the roulette 130 is rotated by the gear 134 linked to the driving motor 132 so that the CD 150 to be reproduced is positioned above the drive unit 140. Therefore, the driving motor 142 is driven to rotate the reduction gear unit 144, thereby raising the drive unit 140 to chuck the CD 150.

The drive unit 140 reproduces the contents recorded on the CD 150 by the optical pickup device while rotating the chucked CD 150.

Meanwhile, even while the CD 150 is being reproduced, since the tray 120 and the roulette 130 are independent of the CD 150 being reproduced, ejection is possible, and when the tray 120 is ejected, the CD 150 is reproduced. Except for the remaining CD 150 will be able to replace.

By the way, the conventional CD changer is for driving the drive motor 124 for the transfer of the tray 120, the reduction gear unit 126 for transmitting the power of the drive motor 124, and for the lifting of the drive unit 140 A drive motor 142, a reduction gear unit 144 for transmitting power of the drive motor 142, and a drive motor 132 for rotating the roulette 130 are respectively provided to have a structure in which the entire mechanism is operated. have.

Therefore, in the drive structure of the conventional CD changer, since all three drive motors 124, 132 and 142 and the gear parts 126 and 144 accompanying it are provided, the structure becomes complicated and the number of parts increases, resulting in low productivity.

The present invention has been made in view of the above problems of the conventional CD changer, and by providing a structure to operate the rotation of the roulette, the lifting and lowering of the drive unit and the entry and exit of the tray with one drive motor, the configuration is simplified and the number of parts is reduced. To increase productivity.

1 is a perspective view of a typical CD changer,

2 is a schematic diagram showing a drive structure of a conventional CD changer;

3 is a schematic view showing a drive structure of the CD changer according to the present invention;

4 is a side schematic view showing a main power transmission element of the present invention;

5 is a front schematic view showing a cam gear and a divided angle rotary gear according to the present invention;

6 is a schematic plan view showing a lift structure of a drive unit according to the present invention;

7 is a front view showing a lifting chassis according to the present invention,

8 (a) is a plan view showing a first braking gear tooth of a cam gear according to the present invention;

8 (b) is a plan view showing a first power transmission gear tooth of the cam gear according to the present invention;

Figure 8 (c) is a plan view showing the complete gear of the cam gear according to the present invention,

9 (a) is a plan view showing a second braking gear tooth of the divided-angle rotary gear according to the present invention;

9 (b) is a plan view showing a second power transmission gear tooth of the divided-angle rotary gear according to the present invention;

10 is a perspective view showing a rack gear, a first bridge gear and a second bridge gear according to the present invention;

Figure 11 (a) is a schematic plan view showing the action of the cam gear during the rotation of the roulette according to the present invention,

Figure 11 (b) is a schematic plan view showing the action of the lifting chassis during the rotation of the roulette according to the present invention,

12 is a schematic plan view showing the action of the planetary gear group in the disc playback mode according to the present invention;

Figure 13 (a) is a plan view schematically showing the lowering action of the drive unit according to the present invention,

Figure 13 (b) is a front view showing the lowering action of the horizontal axis according to the present invention,

Figure 14 (a) is a schematic top view showing the synergy of the drive unit according to the invention,

Figure 14 (b) is a plan schematic diagram of the synergy of the horizontal axis according to the present invention,

15 (a) is a schematic plan view showing the action of the first braking gear tooth and the second braking gear tooth in roulette braking according to the present invention;

15 (b) is a schematic plan view showing the action of the first power transmission gear teeth and the second power transmission gear teeth during roulette braking according to the present invention,

16 (a) is a plan view schematically showing the action of the first braking gear tooth and the second braking gear tooth at the time of roulette rotation according to the present invention;

Figure 16 (b) is a plan view schematically showing the action of the first power transmission gear teeth and the second power transmission gear teeth when roulette rotation according to the present invention,

17 is a schematic plan view showing the action of the planetary gear group at the time of taking out the tray according to the present invention;

18 is a schematic plan view showing the lifting and lowering of the drive unit and the rotation of the roulette when the tray withdrawal is completed according to the present invention;

19 is a schematic plan view showing the action of the planetary gear group upon completion of tray withdrawal according to the present invention;

20 is a schematic plan view showing the action of the planetary gear group during tray loading according to the present invention.

<Explanation of symbols for main parts of drawing>

10: main body 12: rack gear

14: first rotating shaft 16: second rotating shaft

18: first stopper 20: second stopper

22: first bridge gear 24: second bridge gear

26: tension spring 28: first fixed gear

29: second fixed gear 30: tray

32: drive motor 34: first pulley

36: belt 40: planetary gear

42: center gear 44: second pulley

46: rotating plate 48: plate gear

50: first planetary gear 52: second planetary gear

60: Camgear 62: Revolving Home

64: first section 66: second section

68: third section 70: first braking gear value

72: engaging portion 74: first power transmission gear tooth

76: first interval 78: complete cycle

80: lifting chassis 82: inclined groove

84: vertical axis 90: divided angle rotary gear

92: second braking gear tooth 94: second toothless section

96: second power transmission gear 100: drive unit

102: horizontal axis 104: hinge axis

106: Roulette

The present invention for achieving the above object is a tray entering and exiting the main body of the CD changer, a roulette rotatably installed on the tray and a plurality of CDs at regular intervals, and mounted on the tray to be elevated to the roulette In the drive structure for driving the drive unit for reproducing the CD placed,

A drive motor installed on the tray; A planetary gear group installed on the tray and rotating in association with the driving motor; A cam gear installed on the tray to rotate in association with the planetary gear group; A lifting chassis configured to move horizontally by the cam gear to move the drive unit up and down; A divided angle rotary gear formed below the roulette and interlocked with the cam gear; A first fixed gear and a second fixed gear formed on the main body so as to engage with the planetary gear group when the tray is taken out of the tray and the loading of the tray is completed; A first bridge gear and a second bridge gear which are installed to be connected to the first fixed gear and the second fixed gear from the inside, and are engaged only in one direction rotation of the planetary gear group; It is formed on the main body is composed of a rack gear for connecting the first bridge gear and the second bridge gear.

This drive structure is a planetary gear group rotates in one direction when the drive motor is rotated in one direction, and the drive unit is lifted through the cam gear to rotate the roulette to play the selected disk, the drive motor in the other direction When rotating, the planetary gear group is meshed with the first bridge gear, the rack gear and the second bridge gear, so that the tray and the roulette can be withdrawn from the main body.

That is, the drive structure of the present invention is a single drive motor using the rotation of the roulette and the drive unit is lifted and the input and output of the tray is made, it is possible to simplify the configuration and reduce the number of parts to improve productivity.

The following describes a preferred embodiment according to the present invention to facilitate its implementation.

The configuration of this embodiment will be described with reference to the accompanying drawings in FIGS. 3 to 10.

First, a drive unit for reproducing a tray entering and exiting the body of the CD changer, a roulette rotatably installed on the tray, and placing a plurality of CDs at regular intervals, and a CD mounted on the tray to be elevated and placed in the roulette Applied to the drive structure for driving the.

This drive structure includes a drive motor 32 installed on the tray 30, as shown in Figs. 3, 4 and 5; A planetary gear group 40 installed on the tray 30 to rotate in association with the driving motor 32; A cam gear 60 installed on the tray 30 to rotate in association with the planetary gear group 40; An elevating chassis (80) for horizontally moving the cam gear (60) to elevate the drive unit (100); A divided angle rotary gear 90 formed below the roulette 106 and interlocked with the cam gear 60; A first fixed gear 28 and a second fixed gear 29 formed in the main body 10 so as to be engaged with the planetary gear group 40 at the completion of the withdrawal of the tray 30 and the completion of loading of the tray 30; The first bridge gear 22 and the second bridge gear (22) which are installed to be connected to the first fixed gear 28 and the second fixed gear 29 from the inside, respectively, are engaged only when the planetary gear group 40 rotates in one direction. 24); The rack gear 12 is formed on the main body 10 and connects the first bridge gear 22 and the second bridge gear 24 to each other.

The planetary gear group 40 has a center gear 42 interlocked with the driving motor 32 and a cam gear rotatably coupled to the center of the center gear 42, as shown in detail in FIG. 4. A rotating plate 46 having a plate gear 48 meshed with the 60, a first planetary gear 50 provided with the rotating plate 46 and meshed with the center gear 42, and a rotating plate 46. It is installed in the first planetary gear 50 and at the same time the first planetary gear 28 or the second fixed gear 29 is composed of a second planetary gear 52.

In addition, in order to transmit the rotational force of the drive motor 32 to the planetary gear group 40, the first pulley 34 is coupled to the rotation axis of the drive motor 32, the second pulley 44 to the rotation axis of the central gear 42. And a belt 36 for connecting the first pulley 34 and the second pulley 44. Accordingly, the rotational force of the drive motor 32 is transmitted to the center gear 42 through the first pulley 34, the belt 36, and the second pulley 44, and the rotational force of the center gear 42 is the first planetary gear. 50 and the second planetary gear 52 in turn.

Since the rotation plate 46 is rotatably coupled to the center gear 42, when the rotation torque is generated in the first planetary gear 50 or the second planetary gear 52, the rotation plate 46 is the center gear 42. ) Will rotate about the axis.

As shown in FIG. 6, the upper or lower surface of the cam gear 60 has a first section 64 away from the center and an outer side of the first section 64 to form an arc. ), And a revolving groove 62 formed of a third section 68 connected to one end of the second section 66 and extending into the first section 64. Along with this, the lifting chassis 80 is formed with a vertical axis 84 that is inserted into the revolving groove 62 and slides.

Therefore, when the cam gear 60 rotates, the revolving groove 62 formed in the cam gear 60 also rotates, so that the lifting chassis 80 can move only horizontally forward and backward and cannot move vertically or vertically in the drawing. When properly fixed to the tray 30, as the horizontal feed force is generated on the vertical axis 84 inserted into the revolving groove 62, the lifting chassis 80 slides back and forth horizontally.

As shown in FIG. 7, the inclined groove 82 is formed in the elevating chassis 80, and the horizontal shaft 102 inserted into the inclined groove 82 and slides is fixed to the drive unit 100. Therefore, when the lifting chassis 80 moves horizontally, the horizontal shaft 102 is pushed up and down by the inclined groove 82, so that the drive unit 100 is raised and lowered about the hinge shaft 104, and thus the drive unit of FIG. The turntable 103 attached to the 100 chucks the disc and reproduces the recording of the disc by the optical pickup actuator 105.

As shown in FIG. 8 (a), the cam gear 60 has a hook portion having a height of the end circle at a portion except for the unit rotation angle a of the roulette 106 within the angle range constituting the second section 66. As shown in FIG. A first power transmission gear tooth having a first braking gear tooth 70 having a 72 and a first nominal section 76 corresponding to the locking portion 72 as shown in FIG. 8 (b). As shown in Fig. 6 (c), a complete gear 78 engaged with the plate gear 48 of the rotating plate 46 is formed in multiple layers. Here, if the CD changer having the number of disks placed in the roulette 106 is three, the unit rotation angle a of the roulette 106 is 120 degrees. Accordingly, the engaging portion 72 of the first braking gear tooth 70 corresponds to 240 ° except for the unit rotation angle (a) 120 °, and the first nominal section 76 of the first power transmission gear tooth 74 is also The unit rotation angle (a) corresponds to 240 ° except 120 °.

In addition, as shown in FIG. 9 (a), the divided angle rotary gear 90 is engaged with the first braking gear tooth 70 and the second non-interval section in which the engaging portion 72 is caught at each unit rotation angle. The second braking gear tooth 92 having the 94 formed therein and the second power transmission gear tooth 96 of the arm that is engaged with the first power transmission gear tooth 74 as shown in FIG. Is formed.

Accordingly, when the catching portion 72 is caught in the second indentation section 94, the first indentation section 76 is positioned in the second power transmission gear tooth 96 so that power is not transmitted, and the catching portion 72 is closed. The first power transmission gear tooth 74 is meshed with the second power transmission gear tooth 96 to transmit power when it is out of the second nominal section 94.

Meanwhile, as shown in FIG. 10, the first bridge gear 22 and the second bridge gear 24 are rotated by the first rotation shaft 14 and the second rotation shaft 16 formed on the rack gear 12. It is installed so as to, the tension spring 26 for pulling the inner side of the first bridge gear 22 and the second bridge gear 24 is installed, the first bridge gear 22 and the second bridge gear on the rack gear (12) The first stopper 18 and the second stopper 20 are respectively formed to prevent one-way rotation of the 24.

Therefore, the first bridge gear 22 and the second bridge gear 24 are pulled by the tension spring 26 and always have a restoring force, and the first stopper 18 and the second stopper 20 have the first bridge gear 22. ) And the second bridge gear 24 are prevented from being excessively pulled, so that the tips of the first bridge gear 22 and the second bridge gear 24 are always the first fixed gear 28 and the second fixed gear ( 29) to be matched to the second planetary gear (52).

Hereinafter, the operation of the present embodiment having the above-described configuration will be described with reference to the accompanying drawings of FIGS. 11A to 20.

First, the playback mode of the disc will be described.

The loading state of the tray 30 in the main body 10 is as shown in FIGS. 11A, 11B and 12, and a vertical shaft 84 formed on the lifting chassis 80 is attached to the cam gear 60. Located in the second section 66 of the formed revolving groove 62, the horizontal axis 102 fixed to the drive unit 100 is located below the inclined groove 82 of the lifting chassis 80, the drive unit 100 Is in a state where the front of the planetary gear is lowered, and the second planetary gear 52 of the planetary gear group 40 is engaged with the first fixed gear 28 of the inner side.

Here, when the regeneration mode of the disc is started, as shown in FIG. 12, the rotational force of the drive motor 32 is transmitted to the center gear 42 of the planetary gear group 40 through the belt 36, and the rotation of the center gear 42 occurs. Accordingly, the first planetary gear 50 and the second planetary gear 52 rotate together with each other. At this time, since the second planetary gear 52 is engaged with the first fixed gear 28, the second planetary gear 52 travels along the outer circumference of the first fixed gear 28. Accordingly, the rotating plate 46 to which the second planetary gear 52 is fixed, the first planetary gear 50, and the second planetary gear 52 of the first fixed gear 28 are formed around the center gear 42. Turn around.

Here, when the rotational direction of the planetary gear group 40 is counterclockwise, the second planetary gear 52 pushes the rear surface of the first bridge gear 22 and continues to rotate around the first fixed gear 28. The first bridge gear 22 is pushed and then returned to its original position by the restoring force of the tension spring 26.

On the other hand, when the rotating plate 46 rotates, the plate gear 48 rotates the complete gear 78 of the cam gear 60, the cam gear 60 is rotated. Accordingly, the vertical axis 84 of the lifting chassis 80 inserted into the revolving groove 62 formed on the cam gear 60 slides according to the shape of the revolving groove 62.

As shown in FIGS. 11A and 11B, since the vertical axis 84 does not flow when the second section 66 passes the vertical axis 84, the lifting chassis 80 and the horizontal axis ( 102 also does not flow so that the drive unit 100 is also maintained in a lowered state.

13 (a) and 13 (b), when the third section 64 passes the vertical axis 84, the vertical axis 84 moves to the left to move the lifting chassis 80 to the left. Let's do it. Accordingly, the horizontal shaft 102 inserted into the inclined groove 82 of the elevating chassis 80 is pushed up to the inclined surface, whereby the drive unit 100 is raised to chuck the disk at the turntable 103, and the optical pickup actuator 105 Play back the recording on the disc.

14 (a) and 14 (b), when the first section 64 passes the vertical axis 84, the vertical axis 84 moves to the right to move the lifting chassis 80 to the right. Let's do it. Accordingly, the horizontal shaft 102 inserted into the inclined groove 82 of the elevating chassis 80 is pushed down on the inclined surface, so that the drive unit 100 descends and puts the disk on the roulette 106 again on the turntable 103. do.

Since the first and second sections 64, 66 and the third section 68 are continuous in the revolving groove 62 for this operation, the drive motor 32 rotates in one direction to form the planetary gear group 40. ) Continues to rotate in one direction, the drive unit 100 continues the lifting operation repeatedly.

On the other hand, as shown in FIG. 15A, the first braking gear tooth 70 of the cam gear 60 is operated while the drive unit 100 is lifted, that is, the vertical shaft 84 has the first section 64 and When passing through the third section 68, the locking portion 72 is caught in the second end section 94 of the second braking gear tooth 92 of the divided angle rotary gear 90 formed below the roulette 106. The rotation of the 106 is prevented, and the first power transmission gear tooth 74 is not engaged with the second power transmission gear tooth 96 as shown in Fig. 15B.

As shown in FIG. 16A, while the drive unit 100 is lowered, that is, when the vertical axis 84 passes the second section 66, the locking portion 72 is lower than the roulette 106. The teeth of the divided angle rotary gear 90 formed in the second braking gear tooth 92 of the second nominal section 94 is engaged with each other teeth, as shown in Fig. 16 (b), the first power transmission The gear tooth 74 is engaged with the second power transmission gear tooth 96 to rotate the roulette 106.

Next, the withdrawal mode of the tray 30 will be described.

When the user selects the eject mode of the CD changer, as shown in FIGS. 11A and 11B, the second section 66 is positioned on the vertical axis 84, and the vertical axis 84 does not flow, and ascends and descends. The chassis 80 and the horizontal shaft 102 and the drive unit 100 are also lowered to be in a non-flowing state, and as shown in FIGS. 15 (a) and 15 (b), the locking portion 72 is located below the roulette 106. Is caught by the second nominal section 94 of the second braking gear tooth 92 of the divided-angle rotary gear 90, and the first power transmission gear tooth 74 meshes with the second power transmission gear tooth 96. The tray 30 is pulled out in a state that prevents the rotation of the roulette 106 is not in a state.

At this time, as shown in FIG. 17, the drive motor 32 rotates in the reverse direction when the disc is reproduced to rotate the center gear 42, the first planetary gear 50 and the second planetary gear 52 in the reverse direction. Accordingly, the second planetary gear 52 travels in the reverse direction of the outer circumference of the first fixed gear 28 to rotate the rotation plate 46 in the reverse direction.

At this time, the second planetary gear 52 is engaged with the first bridge gear 22. Since the first bridge gear 22 is fixed by the first stopper 18, the second planetary gear 52 is the first bridge. The gear 22 and the rack gear 12 are continuously engaged with each other, and are moved to the second fixed gear 29 through the second bridge gear 24 to be engaged. This phenomenon is caused by the planetary gear group 40 including the second planetary gear 52, the drive motor 32, and the tray 30 fixing the cam gear 60, the drive unit 100, and the roulette 106. It means to be withdrawn from (10).

In this manner, while the tray 30 is pulled out, the second planetary gear 52 continuously engages with the first bridge gear 22, the rack gear 12, and the second bridge gear 24 to move horizontally. Therefore, the rotating plate 46, the cam gear 60 and the lifting chassis 80 do not flow. Therefore, the drive unit 100 keeps the lowered state.

When the withdrawal of the tray 30 is completed, the position sensing means such as a toggle switch detects the transfer completion of the tray 30 and terminates the driving of the driving motor 32.

Even in this state, a mode for reproducing the disc can be executed. The reproducing mode when the tray 30 is taken out will be described with reference to FIG.

At this time, as shown in FIG. 19, the second planetary gear 52 is engaged with the second fixed gear 29 by the rotation of the driving motor 32 to rotate around it. At this time, the rotational direction of the planetary gear group 40 is opposite to the rotational direction in the first disc playback mode.

When the second planetary gear 52 pivots the second fixed gear 29 as described above, the second planetary gear 52 pushes the rear surface of the second bridge gear 24 and rotates continuously, and the second bridge gear 24 is returned to its original shape by the restoring force of the tension spring 26 when the second planetary gear 52 passes. In addition, when the rotation plate 46 rotates by the rotation of the second planetary gear 52, the plate gear 48 rotates the complete gear 78 of the cam gear 60, so that the cam gear 60 rotates. .

Accordingly, the vertical axis 84 of the lifting chassis 80 inserted into the revolving groove 62 formed on the cam gear 60 slides according to the shape of the revolving groove 62 to move the lifting chassis 80. The horizontal shaft 102 fixed to the drive unit 100 moves horizontally along the inclined groove 82 of the elevating chassis 80 to elevate the horizontal shaft 102 and the drive unit 100. Such cam gear 60 ) And the lifting chassis 80 is reversed in the rotational direction and the moving direction shown in FIGS. 12 (a) to 14 (b).

And the first braking gear tooth 70 and the first power transmission gear tooth 74 of the cam gear 60 and the second braking gear tooth 92 and the second power transmission gear tooth of the divided angle rotary gear 90 ( The rotation of 96 is also reversed to the rotation direction shown in FIGS. 15A to 16B, and the lifting and roulette operation of the drive unit 100 in the reverse direction to the disc play mode when the tray 30 is finished loading is performed. Rotational action of 106 is achieved.

As such, even when the tray 30 is drawn out, the drive unit 100 may chuck and play the disk.

On the other hand, the user is installed on the withdrawn tray 30 can be mounted by replacing a plurality of CDs in the roulette 106, when the installation of the CD is completed, the user pushes the tray 30 into the main body 10 initially Invoke loading mode.

Hereinafter, the loading mode of the tray 30 will be described with reference to FIG. 20.

At this time, the driving motor 32 rotates in the opposite direction as in the drawing mode to rotate the planetary gear group 40 in the reverse direction, and the second planetary gear 52 pivots the outer circumference of the second fixed gear 29 in the reverse direction. 2 is engaged with the bridge gear 24. The second planetary gear 52 is continuously engaged with the second bridge gear 24, the rack gear 12, and the first bridge gear 22 to move to the first fixed gear 28.

Therefore, the planetary gear group 40 including the second planetary gear 52, the driving motor 32, and the tray 30 fixing the cam gear 60, the drive unit 100, and the roulette 106 are provided with a main body 10. ) Into the.

As described above, while the tray 30 is loaded, the second section 66 is positioned on the vertical axis 84 so that the vertical axis 84 does not flow as shown in FIGS. 11A and 11B, and the lifting chassis does not flow. 80 and the horizontal shaft 102 and the drive unit 100 are also lowered to be in a non-flowing state, and as shown in Figs. 15 (a) and 15 (b), the locking portion 72 is located below the roulette 106. The second brake gear tooth 92 of the formed divided angle rotary gear 90 is caught by the second nominal section 94 and the first power transmission gear tooth 74 is not engaged with the second power transmission gear tooth 96. The loading operation of the tray 30 is performed in a state of preventing the rotation of the roulette 106 in a non-state.

Therefore, since the second planetary gear 52 is continuously engaged with the first bridge gear 22, the rack gear 12, and the second bridge gear 24 and moves horizontally, the second planet gear 52 does not pivot, and thus the rotation plate 46 and the cam are rotated. The gear 60 and the lifting chassis 80 do not flow. Therefore, the drive unit 100 is maintained in the lowered state.

Subsequently, when the loading of the tray 30 is completed, the position detecting means such as a toggle switch detects the completion of the transfer of the tray 30 to terminate the driving of the driving motor 32.

In this way, the loading of the tray 30 is completed in the same manner as in the first disc playback mode.

As described above, in the present embodiment, when the driving motor 32 rotates in one direction, the planetary gear group 40 rotates in one direction, and the roulette with the action of elevating the drive unit 100 through the cam gear 60. When the drive motor 32 rotates in the other direction, the planetary gear group 40 moves the first bridge gear 22, the rack gear 12, and the second bridge gear when the drive disc 32 rotates in the other direction. Engaged in the 24, the tray 30 and the roulette 106 can be withdrawn or loaded from the main body 10.

Therefore, since the rotation of the roulette 106 and the lifting and lowering of the drive unit 100 and the entry / exit of the tray 30 are performed using one drive motor 32, the configuration is simple and the number of parts is reduced.

As can be seen in the above embodiment, the present invention, the drive unit 100 is moved horizontally by the planetary gear group 40, the cam gear 60, and the cam gear 60 that rotates in conjunction with the drive motor (32) A divided angle rotary gear 90 formed below the elevating chassis 80 and the roulette 106, and the first fixed gear 28 and the second fixed gear 29 meshed with the planetary gear group 40; , The drive structure composed of the first bridge gear 22, the second bridge gear 24 and the rack gear 12, the planetary gear group 40 is transferred, the planetary gear group 40 in accordance with the rotation direction of the drive motor 32 ) Raises and lowers the drive unit 100 or rotates the roulette 106 through the cam gear 60, and is engaged with the first bridge gear 22, the rack gear 12, and the second bridge gear 24. Since the tray 30 can be pulled out from the main body 10, the use of only one drive motor 32 can simplify the configuration and reduce the number of parts, thereby improving productivity. It can be effective.

Claims (7)

The tray 30 entering and exiting the main body 10 of the CD changer, the roulette 106 rotatably installed on the tray 30 to settle a plurality of CDs at regular intervals, and the elevating to the tray 30. In the drive structure for driving the drive unit 100 mounted to reproduce the CD placed in the roulette 106, A drive motor 32 installed on the tray 30; A planetary gear group 40 installed on the tray 30 to rotate in association with the driving motor 32; A cam gear 60 installed on the tray 30 to rotate in association with the planetary gear group 40; An elevating chassis (80) for horizontally moving the cam gear (60) to elevate the drive unit (100); A divided angle rotary gear 90 formed below the roulette 106 and interlocked with the cam gear 60; A first fixed gear 28 and a second fixed gear 29 formed in the main body 10 so as to be engaged with the planetary gear group 40 at the completion of the withdrawal of the tray 30 and the completion of loading of the tray 30; The first bridge gear 22 and the second bridge gear (22) which are installed to be connected to the first fixed gear 28 and the second fixed gear 29 from the inside, respectively, are engaged only when the planetary gear group 40 rotates in one direction. 24); A single motor drive structure of the CD changer, which is formed on the main body (10) and comprises a rack gear (12) connecting the first bridge gear (22) and the second bridge gear (24). According to claim 1, wherein the planetary gear group 40 and the center gear 42 that is linked to the drive motor 32, A rotation plate 46 rotatably coupled to the center of the center gear 42 and having a plate gear 48 meshed with the cam gear 60; A first planetary gear 50 installed on the rotation plate 46 and engaged with the center gear 42; The second planetary gear 52 is installed on the rotary plate 46 and meshes with the first planetary gear 50 and is meshed with the first fixed gear 28 or the second fixed gear 29. Single motor drive structure of the CD changer, characterized in that. The rotating shaft of the driving motor 32 is coupled to the first pulley 34, the rotating shaft of the center gear 42, the second pulley 44 is coupled, the first pulley 34 And a belt 36 connecting the second pulley 44 to the single motor drive structure of the CD changer. The upper and lower surfaces of the cam gear 60 have a first section 64 away from the center and a second section 66 that is connected to the outer side of the first section 64 and has an arc shape. And a revolving groove 62 formed of a third section 68 connected to one end of the second section 66 and extending into the first section 64; The elevating chassis (80) is a single motor drive structure of the CD changer, characterized in that the vertical shaft (84) is inserted into the revolving groove (62) is formed. The cam gear 60 has a locking portion 72 having a tooth tip height at a portion except for a unit rotation angle of the roulette 106 within an angle range constituting the second section 66. Meshed with the first braking gear tooth 70, the first power transmission gear tooth 74 having the first nominal section 76 corresponding to the engaging portion 72, and the plate gear 48. The complete cycle 78 is formed in multiple layers; The divided angle rotary gear 90 is engaged with the first braking gear tooth 70, and a second braking gear tooth having a second endless section 94 on which the locking portion 72 is engaged at each unit rotation angle is formed. (92) and the second power transmission gear tooth (96) of the circumference to be engaged with the first power transmission gear tooth (74) is formed in multiple layers. The inclined groove 82 is formed in the elevating chassis 80, and the horizontal shaft 102 inserted into the inclined groove 82 and slides is fixed to the drive unit 100. Single motor drive structure of CD changer. The method of claim 1, wherein the first bridge gear 22 and the second bridge gear 24 is rotated by the first rotation shaft 14 and the second rotation shaft 16 formed on the rack gear 12. And a tension spring 26 for pulling the inner side of the first bridge gear 22 and the second bridge gear 24, and the first bridge gear 22 and the second bridge gear 12 are installed on the rack gear 12. A single motor drive structure of the CD changer, characterized in that the first stopper (18) and the second stopper (20) are formed to block the one-way rotation of the bridge gear (24), respectively.