CN1641777A - Gear transmission system for optical disc reading and writing device - Google Patents

Abstract

A gear drive system for CD read/write device is composed of the first gear with the second and the third gears, the gear drive group with the first and the second racks and a drive plate with the first and the second racks and a notch. The notch is arranged at one end of the transmission plate to form two opposite strip parts, and the second rack is arranged on the surface of the strip part close to the third gear and on the other side of the notch and faces the third gear.

Description

Gear transmission system for optical disc reading and writing device

technical field

The present invention relates to a gear transmission system, and more particularly to a gear transmission system for an optical drive.

Background technique

Recently, due to the continuous improvement of computer peripherals and the continuous decline in their prices, optical drives have become a must-have electronic product for ordinary people. As shown in FIG. 1 , it is a schematic view of the appearance of a known optical disc reading and writing device (hereinafter referred to as optical drive 1 ). Its structure is shown in FIG. 2 . The known optical drive 1 can be further divided into a bottom 2 , a front cover 3 , a base plate 4 , a tray 5 and an upper cover 6 .

FIG. 3 is an enlarged schematic view of the bottom 2 with a gear transmission system 10 . The gear transmission system 10 includes a gear transmission set 101 , a tray motor 11 , a first gear 12 and a transmission plate 13 . The gear transmission set 101 has a second gear 14 and a third gear 15 , and the second gear 14 is sleeved on the transmission shaft of the tray motor 11 . The transmission plate 13 has a first rack 131 and a second rack 132 .

The first gear 12 is in contact with the first rack 131 located at one end of the transmission plate 13, in order to make the elongated transmission plate 13 stably move back and forth along the long axis direction of the transmission plate 13, and the first gear 12 also has a first The first position 121 of the gear and the second position 122 of the first gear. The first rack 131 has a first end 131a of the first rack and a second end 131b of the first rack, and the second rack 132 has a first end 132a of the second rack and a second end of the second rack. 132b.

Continue to refer to Fig. 3, at this moment this known CD-ROM drive 1 is in the ejection state, and this tray 5 protrudes from this known CD-ROM drive 1 (not shown here), and the first end 131a of the first tooth bar 131 of transmission plate 13 and this first end 131a The first position 121 of a gear 12 is engaged, and the second rack 132 of the transmission plate 13 is separated from the third gear 15 . As shown in FIG. 4 , the gear transmission system 10 in FIG. 3 is further illustrated in a plan view when it is in the disk-unclamping state.

As shown in Figure 5, when the tray 5 is placed into the known optical drive 1 (not shown here), the power device such as the tray motor 11 will drive the second gear 14 to rotate in the direction A, through a plurality of mutual The gear transmission set 101 composed of meshed gears drives the third gear 15 to rotate in the B direction. When the tray 5 is about to fully enter the known optical drive 1, the power device will drive the transmission plate 13 to advance in the direction C, and then referring to FIG. 6, the first end 132a of the second rack 132 is engaged with the third gear 15 , until the second end 132b of the second rack 132 meshes with the third gear 15 . At this time, the second end 131b of the first gear rack 131 of the driving plate 13 meshes with the second position 122 of the first gear 12 , and the known optical drive 1 completes the disk loading action. Regarding the top view of the gear transmission system 10 when the disk feeding is completed in FIG. 6 , further reference can be made to FIG. 7 .

FIG. 8 is an enlarged schematic view of the transmission plate 13 . In conjunction with the foregoing, the mechanism design of the known advance and retreat disc gear transmission system 10, because the third gear 15 is not in permanent contact with the second rack 132 of the transmission plate 13, they are separated from each other at the end of the disc withdrawal stroke, and the disc advance stroke The middle section starts to engage at the rear. However, the two mechanical components that are not in permanent contact will have a probability problem of whether they are properly meshed at the moment when they are separated again. 15, the problem of the toothed parts bumping against each other will cause the two mechanism components to squeeze each other, and cause the entire mechanism system to be stuck; moreover, after the known optical drive 1 completes the action of entering the disc, the second end of the second rack 132 132b meshes with the third gear 15 , at this time, the second end 132b of the second rack 132 is easily broken due to the force exerted by the third gear 15 . Therefore, a new design is urgently needed to solve the above-mentioned mechanism system stuck and broken problems.

Contents of the invention

The purpose of the present invention is to use a gear transmission system to avoid operational failure caused by the mechanism being stuck or broken when the CD-ROM drive is in the working state of loading and unloading the disk.

The invention relates to a gear transmission system for an optical disc reading and writing device. After a tray is placed in the optical disc reading and writing device, the optical disc reading and writing device is used to read and write data on the tray on the disc. The gear transmission system includes a first gear, a gear transmission set, and a transmission plate.

The transmission plate has a first rack, a second rack and a notch. The first gear is in contact with the first rack on one end of the transmission plate, and is used to make the elongated transmission plate stably move back and forth along the long axis of the transmission plate. The gear transmission set has a second gear and a third gear. The third gear rotates in conjunction with the rotation of the second gear, wherein the second gear is driven by a power device to rotate when the optical disk is inserted into and withdrawn from the optical disk reading and writing device.

The first rack is engaged with the first gear, the notch is arranged at one end of the transmission plate, and two opposite elongated parts are formed on both sides of the notch, and the second rack is arranged near the third gear. The surface of the strip part is on the other side of the notch and faces the third gear.

Wherein, after the tray is placed in the optical disc reading and writing device, and the second gear rotates, the transmission plate is driven by the power device to move, so that the second rack and the third gear are separated from the state to become In the state of meshing, after the tray exits the optical disc reading and writing device and the second gear rotates, the transmission plate is driven by the power device to move, so that the second rack and the third gear are in the state of meshing become a state of separation.

As in the above-mentioned gear transmission system, it is further explained that the first gear includes the first position of the first gear and the second position of the first gear, and the first rack also includes the first end of the first rack and the first end of the first rack. the second end of the first rack. Wherein, after the tray exits the optical disc reading and writing device, the first position of the first gear meshes with the first end of the first rack, and after the tray is inserted into the optical disc reading and writing device, the first gear A second position of a gear meshes with the second end of the first rack.

As in the above gear transmission system, in addition, the second rack further includes a first end of the second rack and a second end of the second rack. Wherein when the tray is inserted into the optical disc reading and writing device, the first end of the second rack meshes with the third gear first, and the second end of the second rack meshes with the third gear, when the tray When exiting the optical disc reading and writing device, the second end of the second rack leaves the third gear first, and the first end of the second rack leaves the third gear next.

In addition, a first guide post and a second guide post are respectively provided on the inner surface of the recess opposite to the two elongated parts, the centers of the first guide post and the second guide post are located on a straight line, and the first guide post The first guide post and the second guide post are used to cover and fix the elastic component like a spring, and the material of the elastic component can be metal or plastic material.

Therefore, by means of the notch of the gear transmission system of the present invention, when the third gear and the second rack of the transmission plate mesh again after separation, there is enough margin space to allow the transmission plate to deform, which can prevent the tray from In the working state of loading or unloading, the mechanism is stuck or broken, resulting in operation failure.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings related to the present invention. However, the drawings are provided for reference and illustration only, and are not intended to limit the present invention.

Description of drawings

FIG. 1 is a schematic diagram of the appearance of a known optical drive;

FIG. 2 is an exploded schematic diagram of a known optical drive;

FIG. 3 is an enlarged schematic view of the bottom of a known optical drive;

Fig. 4 is a top view of the gear transmission system when the disk is withdrawn;

Fig. 5 is a schematic diagram of the gear transmission system in the disk-in state;

Fig. 6 is a schematic diagram of the gear transmission system when the disc feeding is completed;

Fig. 7 is a top view of the gear transmission system when the disc feeding is completed;

FIG. 8 is an enlarged schematic diagram of a drive plate of a known optical drive;

FIG. 9 is an exploded view of an optical drive using the gear transmission system of the present invention;

Fig. 10 is an enlarged schematic diagram of the bottom of the optical drive using the gear transmission system of the present invention;

Fig. 11 is an enlarged schematic diagram of an optical drive transmission plate using the gear transmission system of the present invention;

Fig. 12 is a schematic diagram of the gear transmission system when the optical drive using the gear transmission system of the present invention completes disk loading; and

FIG. 13 is a schematic diagram of the gear transmission system when the optical drive using the gear transmission system of the present invention completes disk loading.

Description of drawings and numbers

1 Publicly known CD-ROM drive 1A CD-ROM drive

2 Bottom 2A Bottom

3 Front Cover 3A Front Cover

4 Substrate Substrate 4A Substrate

5 trays 5A tray

6 Upper cover 6A Upper cover

7A Substrate frame 7A1 First guide post

7A2 Second guide post

10 gear transmission system 10A gear transmission system

101 Gear transmission group 101A Gear transmission group

11 Tray motor 11A Tray motor

12 First gear 12A First gear

121 First position of first gear 122 Second position of first gear

12A1 1st position of 1st gear 12A2 2nd position of 1st gear

13 Transmission plate 13A Transmission plate

131 The first rack 131a The first end of the first rack

131b The second end of the first rack 132 The second rack

132a the first end of the second rack 132b the second end of the second rack

13A1 1st rack 13A1a 1st end of 1st rack

13A1b The second end of the first rack 13A2 The second rack

13A2a The first end of the second rack 13A2b The second end of the second rack

13A3 The first guide rail The first positioning point of the first guide rail 13A3a

13A3b The second positioning point of the first guide rail 13A4 The second guide rail

13A4a The first positioning point of the second guide rail 13A4b The second positioning point of the second guide rail

13A5 Notch 13A51 First guide post

13A52 Second guide post 13A6 Elastic component

14 Second gear 14A Second gear

15 Third gear 15A Third gear

Detailed ways

Embodiments of the present invention described below are related to Half Height optical drives. However, the present invention is applicable to all optical drive products, including read-only optical drive (CD-ROM), recordable optical drive (CD-RW), slot-in optical drive, COMBO optical drive, DVD-R/RW optical drive, external optical drive, All optical media recorders and players etc.

As shown in Figure 9, the optical disc reading and writing device (hereinafter referred to as optical drive 1A) can be further divided into a bottom 2A, a front cover 3A, a base plate 4A, a tray 5A, and an upper cover 6A, and the tray 5A is used for placing An optical disc (not shown in the figure), driven by a power unit such as a tray motor, can be inserted into or ejected from the optical drive 1A, further enabling the optical drive 1A to read and write data on the optical disc.

FIG. 10 is an enlarged schematic view of the bottom 2A. The bottom 2A has a gear transmission system 10A and a substrate holder 7A. The gear transmission system 10A includes a gear transmission set 101A, a tray motor 11A, a first gear 12A and A drive plate 13A. The gear transmission set 101A has a second gear 14A and a third gear 15A. The second gear 14A is sheathed on the transmission shaft of the tray motor 11A, and the gear transmission set 101A is composed of a plurality of gears meshing with each other, so that the first The second gear 14A and the third gear 15A can interlock with each other. When the tray 5A is inserted into or ejected from the optical drive 1A, the tray motor 11A will rotate, and the second gear 14A will be rotated by the tray motor 11A as a power device, so that the third gear 15A will rotate in conjunction with the rotation of the second gear 14A.

The transmission plate 13A has a first rack 13A1 and a second rack 13A2. When the tray 5A is inserted into or withdrawn from the optical drive 1A, the transmission plate 13A will be driven by the power device to move back and forth. The first gear 12A is to contact the first rack 13A1 on one end of the transmission plate 13A, in order to make the elongated transmission plate 13A stably move back and forth along the long axis direction of the transmission plate 13A, and the first gear 12A has a first The first position 12A1 of the gear and the second position 12A2 of the first gear.

As shown in Figure 11, the transmission plate 13A has a first rack 13A1, a second rack 13A2, a first guide rail 13A3, a second guide rail 13A4 and a notch 13A5; the first rack 13A1 has a second rack 13A1 a first end 13A1a of a rack and a second end 13A1b of the first rack; the second rack 13A2 has a first end 13A2a of the second rack and a second end 13A2b of the second rack; the first guide rail 13A3 is a zigzag, and has the first positioning point 13A3a of the first guide rail and the second positioning point 13A3b of the first guide rail; the second guide rail 13A4 is a zigzag, and has the first positioning point of the first guide rail 13A4a and the second positioning point 13A4b of the first guide rail.

The notch 13A5 is arranged on one end of the transmission plate 13A, and two opposite elongated parts are formed on both sides of the notch, and the second rack 13A2 is partly arranged on the surface of the elongated part near the third gear 15A and on the notch 13A5 On the other side, the other part extends to the solid surface without the notch 13A5, and the second rack 13A2 faces the third gear 15A. A first guide post 13A51 and a second guide post 13A52 can be further provided on the inner surface of the two opposite elongated parts of the notch 13A5, and the first guide post 13A51 and the second guide post 13A52 can be used to sheath the elastic component 13A6 such as a spring, The material of the spring can be metal or plastic material.

Returning to FIG. 10 , the substrate rack 7A has a first guide post 7A1 and a second guide post 7A2 , which can slide freely in the first guide rail 13A3 and the second guide rail 13A4 respectively. As shown in Figure 10, the CD-ROM drive 1A is in the ejection state at this time, the tray 5A extends out of the CD-ROM drive 1A (not shown here), and the first end 13A1a of the first rack 13A1 of the drive plate 13A is connected to the first end 13A1a of the first rack 13A1. The first position 12A1 of a gear 12A is engaged, and the second rack 13A2 of the transmission plate 13A is disengaged from the third gear 15A. The guide post 7A1 of the substrate rack 7A is located at the first positioning point 13A3 a of the first guide rail 13A3 , and the guide post 7A2 of the substrate rack 7A is located at the first positioning point 13A4 a of the first guide rail 13A4 .

When the tray 5A is inserted into the optical drive 1A of the present invention (not shown here), the tray motor 11A will drive the second gear 14A to rotate in the direction A, and drive the third gear 15A to the direction A through the gear transmission group 101A. Rotate in the B direction, and when the tray 5A is about to enter the optical drive 1A of the present invention, it will drive the drive plate 13A to advance in the C direction, so that the first end 13A2a of the second rack 13A2 meshes with the third gear 15A until the The second end 13A2b of the second rack 13A2 meshes with the third gear 15A, at this time, the second end 13A1b of the first rack 13A1 of the transmission plate 13A meshes with the second position 12A2 of the first gear 12A, so that The optical drive 1A of the present invention completes the action of loading the disk, as shown in FIG. 12 .

Referring further to FIG. 13 for the state of the substrate frame 7A after the optical drive 1A completes the loading state, the guide post 7A1 of the substrate frame 7A is located at the second positioning point 13A3b of the first guide rail 13A3, and the guide post 7A2 of the substrate frame 7A is located at the second positioning point 13A3b of the first guide rail 13A3. The second positioning point 13A4b of a guide rail 13A4 is used to lift the optical head (not shown) connected to the substrate frame 7A to read and write the optical disc (not shown) placed on the tray 5A.

It is further explained that the design of the notch 13A5 added to the transmission plate 13A in the present invention has the effect of: when the third gear 15A and the second rack 13A2 of the transmission plate 13A are engaged again after separation, Even if the tooth-shaped part of the third gear 15A contacts the tooth-shaped part of the first end 13A2a of the second rack 13A2 and the top of the tooth occurs, the mechanism system can still be prevented from being stuck; The second end 13A2b of the second rack 13A2 meshes with the third gear 15A, which can prevent the second end 132b of the second rack 13A2 from being broken due to the force exerted by the third gear 15 . Because the transmission plate 13A has the notch 13A5, and the notch 13A5 is a non-substantial hollowed-out component, there is enough margin space to allow the transmission plate 13A to deform without causing damage to each other or system jamming.

Therefore, by means of the notch 13A5 of the gear transmission system 10A of the present invention, there is enough margin space when the third gear 15A and the second rack 13A2 of the transmission plate 13A are engaged again after separation or after the disk-feeding action is completed. Allowing the transmission plate 13A to be deformed can prevent the optical drive 1A from being stuck in the mechanism or being damaged to each other when the optical drive 1A is in the working state of loading and unloading the disk, so that the operation becomes invalid. In addition, the first guide post 13A51 and the second guide post 13A52 provided on the inner surfaces of the two opposite elongated parts of the notch 13A5 are sleeved with the elastic component 13A6 such as a spring, so as to overcome the tolerance caused by the gear transmission system 10A. If the gap is too large, the problem of tooth skipping between gears is caused. The stretched prestress provided by the elastic component can also resist the deformation of the elongated part toward the notch 13A5, which will help to improve the rigidity of the gear transmission system 10A and increase the product life.

In summary, although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person of ordinary skill in the art can certainly make various modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of claims of the patent application.

Claims (12)

1. gear train assembly that is used for the CD read and write-in apparatus, this CD read and write-in apparatus comprises a pallet, comprising:

One first gear;

One gear drive group, this gear drive group have one second gear and one the 3rd gear, and when this CD read and write-in apparatus is inserted and withdrawed to this pallet, this second gear and the 3rd gear rotated; And

One driver plate, have one first tooth bar, one second tooth bar and a recess, this first tooth bar is this first gear of engagement, this recess is to be arranged at this driver plate one end, form two relative strip members in these recess both sides, this second tooth bar is that part is arranged at the strip member surface near the 3rd gear, and in the opposite side of this recess, and this second tooth bar is towards the 3rd gear;

Wherein, insert this CD read and write-in apparatus in this tray, and after this second gear rotates, this driver plate is driven and is moved, make this second tooth bar and the 3rd gear become the state of engagement, withdraw from this CD read and write-in apparatus at this tray by the state that separates, and after this second gear rotates, this driver plate is driven and is moved, and makes this second tooth bar become the state that separates with the 3rd gear by the state that meshes.

2. gear train assembly as claimed in claim 1, it is characterized in that: first gear also comprises the primary importance of this first gear and the second place of this first gear, this first tooth bar also comprises first end of this first tooth bar and second end of this first tooth bar, wherein after this CD withdraws from this CD read and write-in apparatus, first end engagement of the primary importance of this first gear and this first tooth bar, after this CD is inserted this CD read and write-in apparatus, the engagement of second end of the second place of this first gear and this first tooth bar.

3. gear train assembly as claimed in claim 1, it is characterized in that: this second tooth bar also comprises first end of this second tooth bar and second end of this second tooth bar, wherein when this CD is inserted this CD read and write-in apparatus, first end of this second tooth bar is engagement the 3rd gear earlier, second termination of this second tooth bar engagement the 3rd gear, when this CD withdraws from this CD read and write-in apparatus, second end of this second tooth bar leaves the 3rd gear earlier, and first termination of this second tooth bar and left the 3rd gear.

4. gear train assembly as claimed in claim 1 is characterized in that: the inner surface of relative two strip members of this recess is provided with one first guide pillar and one second guide pillar respectively.

5. gear train assembly as claimed in claim 4 is characterized in that: first guide pillar of this recess and second guide pillar are to be used for sheathed and to fix an elastic parts.

6. gear train assembly as claimed in claim 5 is characterized in that: this elastic parts is to be selected from by metal and plastic material to be formed spring in the group.

7. CD read and write-in apparatus comprises:

One bottom;

One pallet is to be installed on this bottom inside, is subjected to drive to make this pallet load and withdraw from this CD read and write-in apparatus; And

One gear train assembly, be to be installed on this bottom, comprise a driver plate, an and gear drive group, this gear drive group comprises one second gear and one the 3rd gear, the 3rd gear is to cooperate the rotation of this second gear and rotate, when this CD read and write-in apparatus is inserted and withdrawed to this pallet, this second gear is driven and is rotated, this driver plate has one second tooth bar and a recess, this recess is to be arranged at this driver plate one end, forms two relative strip members, and this second tooth bar is the strip member surface that is arranged near the 3rd gear, and in the opposite side of this recess, and towards the 3rd gear;

Wherein, insert this CD read and write-in apparatus in this pallet, and after this second gear rotates, this driver plate is driven and is moved, make this second tooth bar and the 3rd gear become the state of engagement, withdraw from this CD read and write-in apparatus in this pallet by the state that separates, and after this second gear rotates, this driver plate is driven and is moved, and makes this second tooth bar become the state that separates with the 3rd gear by the state that meshes.

8. CD read and write-in apparatus as claimed in claim 7, it is characterized in that: this gear train assembly also comprises one first gear, first gear also comprises the primary importance of this first gear and the second place of this first gear, this driver plate also comprises one first tooth bar, this first tooth bar also comprises first end of this first tooth bar and second end of this first tooth bar, wherein after this pallet withdraws from this CD read and write-in apparatus, first end engagement of the primary importance of this first gear and this first tooth bar, after this pallet is inserted this CD read and write-in apparatus, the engagement of second end of the second place of this first gear and this first tooth bar.

9. CD read and write-in apparatus as claimed in claim 7, it is characterized in that: this second tooth bar also comprises first end of this second tooth bar and second end of this second tooth bar, wherein when this pallet is inserted this CD read and write-in apparatus, first end of this second tooth bar is engagement the 3rd gear earlier, second termination of this second tooth bar engagement the 3rd gear, when this pallet withdraws from this CD read and write-in apparatus, second end of this second tooth bar leaves the 3rd gear earlier, and first termination of this second tooth bar and left the 3rd gear.

10. CD read and write-in apparatus as claimed in claim 7 is characterized in that: the inner surface of two strip members that these recess both sides are relative is provided with one first guide pillar and one second guide pillar respectively.

11. CD read and write-in apparatus as claimed in claim 10 is characterized in that: first guide pillar of this recess and second guide pillar are to be used for sheathed and to fix an elastic parts.

12. CD read and write-in apparatus as claimed in claim 11 is characterized in that: this elastic parts is to be selected from by metal and plastic material to be formed spring in the group.

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