KR20010017235A - Front loading type compact disc changer - Google Patents

Abstract

PURPOSE: A CD changer is provided to offer the necessary driving force with one motor, to load/unload the tray in a pickup state of the disk and not to forcibly load the tray at a playback of the disk. CONSTITUTION: A tray(12) is slid into a main body(10) through a guide path. Many disks are loaded in a roulette(14). A pickup unit picks up one disk. A driving motor(M) drives the tray and the pickup unit. A power transfer device loads/unloads the tray, and raises/falls the pickup unit by transferring the driving force of the driving motor to the tray and the pickup unit. A rack has first/second/third/fourth sections. The first section operates to load/unload the tray in a fallen state of the pickup unit. The second section operates to raise and fall the pickup unit in a loaded state of the tray. The third section operates to unload/load the tray in a raised state of the pickup unit. The fourth section operates to prevent a forcible loading of the tray by a shock.

Description

Front Loading CD Changer {FRONT LOADING TYPE COMPACT DISC CHANGER}

The present invention relates to a front loading type CD changer configured to select a disc seated on a desired portion by seating a plurality of discs, and more particularly, a driving force required for loading / unloading a tray and picking up a disc. It is possible to reduce the cost and improve the productivity by providing all of them with one motor, and improve the user's convenience by enabling the loading / unloading of the tray even when the disc is picked up. The present invention relates to a front-loading CD changer that prevents component damage due to inexperienced operation by disabling loading.

A front loading CD changer capable of selecting a desired disc while a plurality of discs are seated at the same time generally includes a main body, a tray installed to be housed inside the main body, and a plurality of discs ( a roulette on which the disc is seated and rotatably installed in the tray, a pickup unit for picking up any one of the discs seated on the roulette, and a plurality of motors for providing a driving force for driving the CD changer. Include.

Here, the motor is typically disposed in the central portion of the main body to pick up the CD to move the pickup unit and the pick-up unit when the tray is loaded in front of the main body to slide the tray in the front and rear direction, Pickup motors, and motors for rotating the roulette when the disk is replaced.

As described above, the loading motor and the pickup motor are separately provided in the related art, and these motors are provided to provide the driving force necessary for the loading operation and the pickup operation, respectively.

However, according to the conventional CD changer configured as described above, since the loading motor and the pickup motor are separately provided, and the loading motor is disposed at the front side of the main body, the miniaturization of the product is impossible and the circuit configuration is not simple. There are very disadvantageous problems in terms of cost and productivity.

Accordingly, the present invention is to solve the above problems, it is possible to reduce the cost, productivity can be provided by providing all the driving force for the operation of loading / unloading the tray and the operation of picking up the disc with one motor Its purpose is to provide a frontloading CD changer that can be improved.

Another object of the present invention is to provide a front loading type CD changer which can improve user convenience by enabling unloading / loading of a tray even when a disc is picked up.

It is still another object of the present invention to provide a front loading type CD changer which can prevent the breakage of parts due to immature operation by making it impossible to forcibly load the tray due to external impact during disc play.

1 is an exploded perspective view of a CD changer according to the present invention.

Figure 2 is a bottom perspective view of a tray applied to the CD changer of the present invention.

3 is a rear view of the slider applied to the CD changer of the present invention.

Figure 4 is a cross-sectional view showing the installation state of the rotary roller applied to the tray of the present invention.

5 to 7 show the operating state of the tray apparatus according to the present invention,

5 is a partial cutaway perspective view when the drive gear is located in the first section;

Fig. 6 is a partially cutaway perspective view when the drive gear is positioned between the second and third sections.

Fig. 7 is a partially cutaway perspective view of the drive gear when positioned in the fourth section.

An object of the present invention as described above, the main body, a tray slidably installed into the main body along the guide path provided in the main body, a roulette rotatably installed on the tray and seated on the roulette, and seated on the roulette A pickup unit installed in the main body to pick up one of the disks, a drive motor for driving the tray and the pickup unit, and a driving force of the drive motor to the tray and the pickup unit to load / unload the tray. On the other hand, it is achieved by a front loading type CD changer including a power transmission means for lifting and lowering the pickup unit.

According to a preferred feature of the invention, the power transmission means includes a drive pulley provided on the shaft of the drive motor; A driven pulley which rotates in response to the power of the driving pulley; A rotational arm fixed to the main body on the same axis as the driven pulley and having a fan-shaped gear at one end thereof; A shaft on the other end side of the rotating arm to engage the power transmission gears fixed to the rotating arm so as to transmit the driving force of the driven pulley to the rotating arm, and to load / unload the tray in engagement with a rack of a predetermined shape provided on the bottom of the tray. And a slider which has a fixed drive gear and a gear portion engaged with the fan gear to slide the pick-up unit in the forward / backward rotation of the pivoting arm, thereby lifting or lowering the pickup unit.

The rack provided on the bottom of the tray may include a first section serving as a section for loading / unloading a tray in a state where the pickup unit is lowered, and a section serving as a section for lifting the pickup unit in a state where the tray is loaded. And a second section and a third section serving as a section for enabling the unloading / loading of the tray in the lifted state of the pickup unit.

Preferably, the rack further includes a fourth section serving as a section for preventing the tray from being forcibly loaded by an external impact when the tray is unloaded while the pickup unit is lifted.

And inside the rack, the guide part for guiding the shaft of a drive gear is provided.

On the other hand, both rear portions of the pickup unit are hinged to the main body, and the lifting projection is provided on the front side of the pickup unit, and the slider is provided with a slide hole for inserting and sliding the lifting projection of the pickup unit. Is composed of an inclined long hole and a horizontal long hole provided at both ends of the inclined long hole.

In addition, leg members for supporting the tray are provided at both sides of the tray, and the leg members are slidably installed in the longitudinal direction of the tray.

According to the present invention having the above characteristics, it is possible to provide all of the driving force required for loading / unloading the tray and picking up the disc with one motor, thereby reducing the appearance size of the main body and reducing the number of parts. This can reduce costs and improve productivity.

In addition, when the drive gear is located in the third section, the tray can be unloaded even when the disk is picked up, thereby improving user convenience.

In addition, when the drive gear is located in the fourth section, it is possible to prevent the tray from being loaded due to the immature operation of the operator (when the tray is forcibly loaded) while the disk is picked up. Can be.

On the other hand, the roulette seating portion provided on the upper surface of the tray is provided with a plurality of roller installation grooves in which the rollers are rotatably installed at equal intervals. An elastic piece having a locking jaw is provided.

In addition, the roulette is pressed to the tray side by the elastic pressing means. The elastic pressing means has a ring-shaped washer installed on the outer circumference of the roulette coupling shaft from the upper side of the roulette, a coil spring provided on the outer circumference of the roulette coupling shaft above the washer, and a head portion to which the coil spring is in contact, and from the upper side of the coil spring. It consists of a fastening screw fastened to the roulette coupling shaft.

In this way, even when the tightening screw is not tightened with the proper tightening force, the roulette is pressurized with the proper force by the spring, thereby ensuring smooth rotational operation of the roulette and at the same time suppressing the generation of noise due to the up and down flow of the roulette, Since the rotational roller for supporting the bottom of the roulette is prevented from being separated from the roller installation groove by the locking jaw of the elastic piece, it is possible to prevent the roller from being separated from the installation groove during the transport and handling of the CD changer.

Hereinafter, a tray apparatus according to a preferred embodiment of the present invention with reference to the accompanying drawings in detail as follows.

Figure 1 shows an exploded perspective view of the CD changer according to the present invention, Figure 2 shows a bottom view of the tray applied to the CD changer of the present invention, Figure 3 is a rear view of the slider applied to the CD changer of the present invention. It is shown.

As illustrated, the front loading type CD changer of the present invention includes a main body 10, a tray 12 slidably installed into the main body along guide guides provided at both sides of the main body 10, and a tray ( A roulette 14 rotatably installed at 12 and a pickup unit 16 installed at a rear side of the main body 10 so as to pick up any one of the disks seated on the roulette 14; ), The driving motor M for driving the tray 12 and the pickup unit 16, and the driving force of the driving motor M to the tray 12 and the pickup unit 16 to transfer the tray 12. And a power transmission means for actuating the pick-up unit 16 up and down while loading / unloading operation.

The main body 10 is formed to have a length enough to support about 1/2 of the tray 12, the rear side of the pickup unit 16 is hinged fixed to the rear side of the main body 10, the main body 10 The drive motor M is installed in the front center portion of the front side.

Then, a rotational arm 20 having a fan-shaped gear 18 at one end is rotatably provided at the left side of the drive motor M, and the motor M is provided at the shaft 22 at which the rotational arm 20 is fixed. The driven pulley 24 and the driven pulley 28 connected by the belt 26 is installed, the gear 28 'provided on the lower side of the driven pulley 28, the first and second power transmission gear 30 , 32) are connected.

The first and second power transmission gears 30 and 32 are rotatably installed on the rotational arm 20 on the opposite side of the fan-shaped gear 18 about the shaft 22 and the second power transmission gear 32. ) Is meshed with a drive gear 34 rotatably installed on the pivot arm 20.

As such, the drive gear 34 driven by the motor M is engaged with the rack 36 formed on the bottom surface of the tray 12, and the rack 36 is picked up as shown in FIG. 2. A first section 36a which serves as a section for loading / unloading the tray 12 in a state where the unit 16 is lowered, and a lift unit 16 for lifting the pickup unit 16 in a state where the tray 12 is loaded. A second section 36b serving as a section, a third section 36c serving as a section for enabling the unloading / loading of the tray 12 while the pick-up unit 16 is elevated, and a pick-up unit When the tray 12 is unloaded while the 16 is raised and lowered, the recessed shape has a fourth section 36d which serves as a section for preventing the tray 12 from being forcibly loaded by an external impact. And a guide for guiding the shaft 34 'of the drive gear 34 to the inside of the rack 36 The id part 38 is provided.

Accordingly, when the drive gear 34 is rotated when the motor M is driven, the drive gear 34 is rotated on the first to fourth sections 36a to 36d of the rack 36, and the drive gear 34 is rotated. Depending on which section is currently rotated, the loading / unloading operation of the tray 12, the rotating operation of the rotating arm 20, and the lifting / lowering operation of the pickup unit 16 are respectively made in various states.

Thus, the slider 40 which is slidably installed in the left-right direction of the main body in the fan gear 18 of the rotation arm 20 so that the pick-up unit 16 can be moved up or down during the rotation of the rotation arm 20 is rotated. ), The gear portion 42 of the) is engaged, the elevating projection 46 provided in the front end of the pickup unit 16 is inserted into the slide hole 44 provided on the back of the slider 40, the main body 10 ) Is provided with a vertical hole (not shown) into which the lifting projection 46 is inserted.

Here, the slide long hole 44 is composed of an inclined long hole (44b) and the lower horizontal long hole (44a) and the upper horizontal long hole (44c) provided at both ends of the inclined long hole (44b).

Therefore, the lifting projection 46 is raised and lowered in the vertical direction by the inclined long hole 46b and the vertical long hole (not shown).

In addition, the slider 40 is formed with a lever insertion hole 50 into which the switch lever 48 for detecting a rising / lowering state of the pickup unit 16 is inserted by being turned on / off according to the moving state of the slider. Legs 52 for supporting the front portion of the tray 12 that are not supported by the main body 10 are slidably installed in the longitudinal direction of the tray 12 on both sides of the 12.

Meanwhile, as illustrated in FIG. 4, rollers 52 for supporting the bottom surface of the roulette 14 are provided at equal intervals on the roulette seating portions formed on the upper surface of the tray 12, and the rollers 52 are installed. The roller installation groove 54 is provided with an elastic piece 60 including shaft support portions 58 and 58 'for supporting the roller shaft 56 and a locking step for preventing the flow of the roller 52.

In addition, a roulette coupling shaft 62 to which the roulette 14 is coupled is formed at the center of the roulette seating portion, and a roulette coupling shaft 62 is provided with a screw fastening hole for fastening the screw 64 to the roulette coupling shaft 62. ), The shaft engaging portion insertion groove 66 into which the shaft engaging portion end of the roulette 14 is inserted is formed to a predetermined depth.

The roulette 14 rotatably installed at the roulette coupling shaft 62 has a shaft coupling portion 68 formed therethrough with the shaft 62 penetrating therethrough, and has a shaft at the center of the shaft coupling portion 68. Through holes (not shown) are provided.

Accordingly, when the roller 52 is pressed from the upper side of the roller installation groove 54, the roller 52 is installed in the installation groove 54 while the elastic piece 60 having the locking jaw is elastically deformed by the roller shaft 56. ), The roller shaft 56 is supported by the shaft supports 58 and 58 'and the roller 52 is inserted into the installation groove 54. Then, the elastic piece 60 is restored to Flow is prevented by the locking jaw.

In this state, the roulette 14 is installed through the roulette coupling shaft 62 formed in the center portion of the tray 12, and the ring-shaped washer 70 is installed on the outer circumference of the roulette coupling shaft 62 to form the washer 70. ) Is mounted on the inner side of the shaft coupling portion 68, and then, the coil spring 72 is installed on the outer circumference of the roulette coupling shaft 62 above the washer 70, and tightened from the upper side of the coil spring 72. The screw 64 is fastened to the roulette coupling shaft 62.

In this way, the roulette 14 is elastically pressurized by the spring 72 so that the bottom surface is in close contact with the roller 52, thereby ensuring a smooth rotational operation of the roulette and at the same time suppress the generation of noise due to the vertical flow of the roulette Since the roller shaft of the rotary roller is caught by the locking jaw of the elastic piece, it is possible to firmly maintain the installation state of the rotary roller.

Hereinafter, the operation of the present invention configured as described above in detail.

As shown in FIG. 1, when the tray 12 is advanced and unloaded forward of the main body 10, the drive gear 34 may be formed of the rack 36 provided on the bottom surface of the tray 12. It is located in the 1st section 36a, and the rotation arm 20 is rotated counterclockwise about the axis 22. As shown in FIG.

Therefore, the slider 40 provided with the gear part 42 engaged with the fan gear 18 of the rotational arm 20 is moved to the left side, and the raising and lowering protrusion 46 of the pickup unit 16 is the slider 40. It is located in the lower horizontal long hole 44a provided on the back of the), and thus, the pickup unit 16 is lowered forward with respect to the rear hinge shaft 46 '.

When the pick-up signal is input in this state, the drive motor M is rotated in the clockwise direction so that the drive gear 34 is rotated in the counterclockwise direction and the tray 12 having the rack 36 engaged with the drive gear 34. ) Is reversed toward the main body 10 for the loading operation, and loading of the tray 12 when the drive gear 34 is located in the section connecting the first and second sections 36a, 36b of the rack 36. The operation is completed.

Thereafter, when the drive gear 34 is continuously rotated counterclockwise, the rotating arm 20 starts to rotate clockwise about the axis 22 from which the slider 40 moves to the right. Then, the elevating projection 46 of the pickup unit 16 starts to elevate in the vertical direction along the inclined long hole 44b and the vertical long hole (not shown).

Therefore, the pick-up unit 16 starts to be slowly raised and lowered about the rear hinge shaft 46 ', and during the lifting operation of the pick-up unit 16, the tray 12 is driven by the drive gear 34. Since it is located in the second section 36b, the loading state is continuously maintained.

Subsequently, as shown in FIG. 6, when the drive gear 34 is positioned in the connecting section connecting the second section 36b and the third section 36c of the rack 36, the slider 40 is maximized to the right. Since the lifting operation of the pickup unit 16 is completed (the pickup completion signal is output by the switch lever at this time), the pickup of the disc seated on the roulette 14 is completed, and thus the pickup unit 16 is completed. By controlling (16), operations such as regeneration, fast forward, rewind, and the like are enabled.

Then, in the state where the pickup and loading operation is completed as described above, when the reproduction stop signal and the tray unloading signal are input, the motor M is driven in the counterclockwise direction and the drive gear 34 starts to rotate in the clockwise direction. After that, the CD changer is operated in the reverse order above to unload the tray.

On the other hand, when the tray unloading signal is input during the reproducing of the disc, the motor M is driven in the clockwise direction and the drive gear 34 is rotated in the counterclockwise direction, whereby the drive gear 34 is rotated in the second and second directions. It starts to be located in the 3rd section 36c from the connection section of 3 sections 36b and 36c.

As such, when the drive gear 34 starts to be positioned in the third section 36c, the tray 12 starts to be unloaded with the slider 40 positioned at the rightmost side, and the drive gear 34 is As shown in FIG. 7, the unloading of the tray 12 is completed when positioned in the fourth section 36d.

Accordingly, the tray can be unloaded even during the disc playback.

On the other hand, the controller (not shown) provided in the CD changer generally recognizes that all the disks are seated in the roulette when the loading signal is input and loads the tray as it is, but the tray is not loaded. If is forcibly loaded by an external impact, it is programmed to rotate the roulette to detect in which part of the roulette the disk is seated.

Therefore, when the disk 12 is unloaded and the disc is replaced, and the loading signal is input, the drive gear 34 is rotated clockwise so that the drive gear 34 is rotated from the fourth section 36d to the third section. (36c) is located in the connecting section of the third and second sections (36c, 36b), which causes the tray to be operated and loaded in the reverse order.

However, if the operator attempts to force the tray 12 by impacting the tray 12 during the disc reproduction, at this time, since the drive gear 34 is located in the fourth section 36d, the tray cannot be loaded. It is possible to prevent the device from being damaged by collision between the roulette and the pickup unit due to inexperienced operation.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

As described above, according to the front loading type CD changer according to the present invention, since the driving force required for loading / unloading the tray and picking up the disc can be provided by one motor, the appearance size of the main body is reduced. Due to the reduction of the number of parts and parts, cost can be reduced and productivity can be improved.

In addition, when the drive gear is located in the third section, the unloading / loading operation of the tray can be performed even when the disc is picked up, thereby improving user convenience. When the drive gear is located in the fourth section, Since the tray can be prevented from being loaded due to an immature operation of the operator (when the tray is forcibly loaded) in the picked-up state, it is possible to prevent component breakage due to immature operation.

In addition, since the roulette is elastically pressurized by a spring so that the bottom face is in close contact with the roller, even when the tightening screw is not tightened with proper tightening force, the roulette can be smoothly operated and the noise generated by the up and down flow of the roulette can be suppressed. It is possible to prevent the rotating roller for supporting the bottom of the roulette from the roller installation groove by the locking jaw of the elastic piece, thereby preventing the roller from being separated from the installation groove during the transport and handling of the CD changer.

Claims (13)

A main body, a tray slidably installed into the main body along a guide path provided in the main body, a roulette rotatably installed on a roulette coupling shaft of the tray and a plurality of disks seated thereon, and a disk seated on the roulette wheel A pickup unit installed in the main body to pick up any one of the disks, a drive motor for driving the tray and the pickup unit, and a driving force of the drive motor to the tray and the pickup unit to load / unload the tray. A front loading type CD changer including a power transmission means for carrying out loading operation and for elevating and operating said pickup unit. According to claim 1, The power transmission means, Drive pulley provided on the shaft of the drive motor; A driven pulley which rotates in response to the power of the driving pulley; A rotational arm fixed to the main body on the same line as the driven pulley and having a fan gear at one end thereof; The power transmission gears axially fixed to the pivot arm to transmit the driving force of the driven pulley to a drive gear; and a rack of a predetermined shape provided on the bottom of the tray to engage / load the tray. And a slider configured to be axially fixed to the other end side and a gear portion engaged with the fan gear to slide the pick-up unit in the forward and backward rotation of the pivoting arm to move the pickup unit up or down. 3. The rack of claim 2, wherein the rack comprises a first section serving as a section for loading / unloading the tray while the pickup unit is lowered, and a section for lifting the pickup unit when the tray is loaded. And a third section acting as a section for acting as a section for enabling the unloading / loading of the tray in a lifted state of the pickup unit. 4. The front loading of claim 3, wherein the rack further comprises a fourth section serving as a section for preventing the tray from being loaded by an external impact when the tray is unloaded while the pickup unit is lifted. Method CD changer. The front loading type CD changer of claim 2, wherein a guide part for guiding the shaft of the driving gear is provided inside the rack. According to claim 2, wherein the rear both sides of the pickup unit is hinged to the main body, the front and rear of the pickup unit is provided with a lifting projection, the slider is provided with a slide hole which is inserted and slides the lifting projection of the pickup unit. Front loading CD changer. The front loading type CD changer according to claim 6, wherein the slide long hole comprises an inclined long hole and horizontal holes provided at both ends of the inclined long hole. 3. The front loading type CD changer according to claim 2, further comprising a sensor means for detecting a rising / lowering state of the pickup unit by being turned on / off according to the moving state of the slider. The front loading type CD changer according to claim 1, wherein both sides of the tray are provided with leg members for supporting the tray. The front loading type CD changer according to claim 9, wherein the leg member is slidably installed. The roulette seating portion provided on the upper surface of the tray is provided with a plurality of roller mounting grooves in which the rollers are rotatably installed at equal intervals, and the roller mounting groove includes a shaft support portion for supporting a roller shaft, Front loading type CD changer is provided with an elastic piece including a locking step for preventing the flow of the roller. The front loading type CD changer according to claim 1, wherein the roulette is pressed to the tray side by elastic pressing means. The said elastic pressing means is a ring-shaped washer installed in the outer periphery of the said roulette coupling shaft from the upper side of the said roulette, the coil spring provided in the outer periphery of the said roulette coupling shaft above the washer, and the said coil spring. Front loading type CD changer consisting of a fastening screw fastened to the roulette coupling shaft from the upper side of the.