A compact optical drive with dual optical heads and lossless optical discs

Abstract

The present invention provides a compact optical drive with dual optical heads and lossless optical discs, comprising a bottom shell assembly, a top cover assembly, a lower drive assembly, a platen pressing assembly and a platen pressing lifting assembly; the top cover assembly is arranged on the bottom shell assembly, and a read-write compartment is formed between the bottom shell assembly and the top cover assembly; the bottom shell assembly comprises a bottom shell and a loading motor and a gear set arranged on the bottom shell, the loading motor can drive the gear set, and the gear set drives the lower drive assembly to enter and exit the read-write compartment; the platen pressing lifting assembly can drive the platen pressing assembly to rise and fall. The internal parts of the compact optical drive with dual optical heads disclosed by the present invention have a compact structure and a high degree of integration, and can meet the needs of specific fields with limited standards or requirements for the size of optical drives; while ensuring the stability of the optical disc when reading and writing, during the process of loading the optical disc, the optical disc does not contact other parts, thereby protecting the optical disc signal surface. The use of dual drive assemblies working simultaneously can correspond to large-capacity double-sided optical discs with high reading and writing rates.

Description

Technical Field

[0001] The invention relates to the field of optical storage technology, and in particular to a compact optical drive with double optical heads and no loss of optical discs. Background Art

[0002] With the advent of the big data era, the demand for data storage by small businesses and individual users has exploded, and optical disk storage products have been applied in many fields. However, the internal transmission structure of existing optical drive devices is relatively complex, with many parts, resulting in the size of the optical drive being generally too large, which does not meet the requirements of fields with specific requirements for the size of optical drives; when the optical drive reads and writes optical disks, the high-speed rotation of the optical disk causes the optical disk to tilt and slip, resulting in poor stability during reading of the optical disk, which cannot meet the reading and writing requirements; at the same time, existing optical drives cannot handle large-capacity double-sided optical disks, and the reading and writing efficiency is low.

[0003] Therefore, there is an urgent need for an optical drive with a simple and compact transmission structure that can meet the size standard requirements of a specific field, and has a high read and write speed and high optical disc stability. Summary of the invention

[0004] The present invention provides a compact optical drive with double optical heads and no loss of optical discs to solve the above problems.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] A compact optical drive with dual optical heads and no optical disc loss, comprising a bottom shell assembly, a top cover assembly, a lower drive assembly, a disc pressing assembly, a disc pressing lifting assembly and an upper drive assembly;

[0007] The top cover assembly is arranged on the bottom shell assembly, and a read-write compartment is formed between the bottom shell assembly and the top cover assembly; the lower drive assembly and the plate pressing assembly are arranged in the read-write compartment; the upper drive assembly is fixed on the top cover assembly and placed in the read-write compartment;

[0008] The bottom shell assembly includes a bottom shell, on which a loading motor and a gear set are provided. The loading motor can drive the lower drive assembly to move horizontally through the gear set to enter and exit the read-write bin; the lower drive assembly is used to read and write optical discs; and the disc press lifting assembly is used to drive the disc press assembly to rise and fall.

[0009] Further, the platen lifting assembly includes a driving pin and a guide rod;

[0010] The platen pressing device assembly comprises a platen pressing device support and a platen pressing device arranged on the platen pressing device support, and the platen pressing device support side plates extending downward are arranged on the periphery of both sides of the platen pressing device support; vertical sliding grooves are arranged on the two outer sides of the side plates of the support, and the driving pins are arranged on the two inner sides of the side plates of the support;

[0011] The lower drive assembly includes a lower drive base, the cam groove is arranged on both sides of the lower drive base, and the cam groove is closer to one end of the lower drive assembly moving out of the read-write bin than the other end, so that when the lower drive assembly enters the read-write bin, the drive pin enters the lower end of the cam groove to achieve the limitation of the disc presser on the optical disc on the lower drive assembly; the guide rod is fixed to the bottom shell; the disc presser assembly is connected to the guide rod through the groove and can slide up and down along the guide rod; the drive pin is arranged in the cam groove; when the lower drive base enters and exits the read-write bin, the drive pin can move in the cam groove and then drive the disc presser assembly to move up and down along the guide rod.

[0012] Furthermore, the upper drive assembly has the same structure as the lower drive assembly, including a feed motor, a main shaft, a secondary shaft and an optical head. The feed motor can drive the optical head along the main shaft and the secondary shaft to approach or move away from the feed motor, and the upper drive assembly can read and write the optical storage surface on the optical disc.

[0013] Furthermore, a rack is fixed on the lower drive base, and a gear cavity is provided on the side of the rack close to the gear group, and the gear group and the loading motor are provided in the gear cavity; the gear group is meshed with the rack; the loading motor drives the lower drive base to enter and exit the read-write bin through the gear group and the rack.

[0014] Furthermore, a spindle motor is provided on the lower drive base, and a chuck claw is provided on the spindle motor. The upper end of the chuck claw can extend from the middle opening of the optical disc and clamp the optical disc.

[0015] Furthermore, a forced exit hole is provided on the outer side of the lower drive base, and the forced exit hole is connected to the gear cavity. The forced exit hole corresponds to the gear set located in the gear cavity. The gear set driving member can enter the gear cavity from the forced exit hole and force the gear set to rotate in the opposite direction, thereby driving the lower drive assembly out of the read-write bin.

[0016] Furthermore, a guide rail is provided on the bottom shell;

[0017] Horizontal ribs and longitudinal ribs are provided on both sides of the lower driver base;

[0018] The top cover assembly includes a top cover and top cover ribs arranged on both sides of the top cover;

[0019] The upper and lower ends of the horizontal ribs are respectively in contact with the top cover ribs and the guide rails, and the side of the longitudinal ribs close to the horizontal ribs is in contact with the guide rails;

[0020] Through the horizontal ribs and the longitudinal ribs on both sides of the lower drive base, under the restriction and guidance of the guide rails and the top cover ribs, the lower drive base can move in and out of the read-write bin in the horizontal direction.

[0021] Furthermore, a motor control switch is provided on the bottom shell; when the lower drive assembly enters and exits the read-write compartment, the motor control switch can be triggered or released by the lower drive base to start and stop the loading motor.

[0022] Compared with the existing compact optical drive with dual optical heads, the present invention has the following beneficial effects:

[0023] (1) The compact optical drive with dual optical heads disclosed in the present invention has a simple internal transmission structure, a small number of parts, a compact structure, high integration and space utilization, and can meet the needs of specific fields with limited standards or requirements for optical drive size;

[0024] (2) The cooperation of the disc pressing assembly and the disc pressing lifting assembly provided in the optical drive can ensure the stability of the optical disc when reading and writing;

[0025] (3) The optical drive is equipped with an upper and lower dual drive assembly, which can read and write both sides of the optical disc at the same time, with a high read and write speed, and is suitable for large-capacity double-sided optical discs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a compact optical drive structure with dual optical heads and lossless optical discs disclosed in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the matching relationship between a compact optical drive disc pressing assembly with dual optical heads and a lower drive assembly and a bottom shell assembly disclosed in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of a compact optical drive top cover assembly and an upper drive assembly with dual optical heads and no optical loss in an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of a compact optical drive assembly with dual optical heads and lossless optical disks disclosed in an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of a gear set structure of a compact optical drive with dual optical heads and no optical disc loss disclosed in an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the matching relationship between a lower drive assembly, a bottom shell assembly and a top cover assembly of a compact optical drive with dual optical heads and lossless optical discs disclosed in an embodiment of the present invention;

[0033] Figure 7 A compact optical drive with dual optical heads and lossless optical discs disclosed in an embodiment of the present invention is a schematic diagram of forced ejection;

[0034] Figure 8 It is a schematic diagram of the states of the main components of a compact optical drive with dual optical heads and lossless optical discs disclosed in an embodiment of the present invention when an optical disc is loaded in place;

[0035] Fig. 9 The present invention is a schematic diagram of the states of the main components of a compact optical drive with dual optical heads and no optical loss during optical disc unloading disclosed in an embodiment of the present invention.

[0036] In the figure: 1. bottom shell assembly; 101. bottom shell; 102. loading motor; 103. gear set; 104. guide rail; 105. motor gear; 106. reduction gear; 107. loading gear; 108. reduction gear upper wheel body; 109. reduction gear lower wheel body; 110. loading gear upper wheel body; 111. loading gear lower wheel body; 112. motor control switch; 113. gear set drive member; 114. main control circuit board; 2. top cover assembly; 201. top cover; 202. top cover rib; 203. indicator light; 204. ejection key; 3. lower drive assembly; 301. lower drive base; 302, rack; 303, gear cavity; 304, spindle motor; 305, chuck claw; 306, forced ejection hole; 307, horizontal rib; 308, longitudinal rib; 309, lower drive cover; 4, platen press assembly; 401, platen press bracket; 402, platen press; 403, bracket side plate; 5, platen press lifting assembly; 501, slide; 502, drive pin; 503, guide rod; 504, cam slide; 6, read-write bin; 7, optical disc; 8, upper drive assembly; 801, feed motor; 802, spindle; 803, secondary shaft; 804, optical head; 805, motor shaft. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example:

[0039] A compact optical drive with dual optical heads for lossless optical discs, such as Figure 1 As shown, a compact optical drive with dual optical heads and lossless optical discs is characterized in that it includes a bottom shell assembly 1, a top cover assembly 2, a lower drive assembly 3, a disc pressing assembly 4, a disc pressing lifting assembly 5 and an upper drive assembly 8;

[0040] The top cover assembly 2 is arranged on the bottom shell assembly 1, and a read-write compartment 6 is formed between the bottom shell assembly 1 and the top cover assembly 2; the lower drive assembly 3 and the plate pressing assembly 4 are arranged in the read-write compartment 6; the upper drive assembly 8 is fixed on the top cover assembly 2 and placed in the read-write compartment 6;

[0041] The bottom shell assembly 1 includes a bottom shell 101, on which a loading motor 102 and a gear set 103 are provided. The loading motor 102 can drive the lower drive assembly 3 to move horizontally through the gear set 103 to enter and exit the read-write bin 6; the lower drive assembly 3 is used to read and write the optical disc 7; the disc pressing device lifting assembly 5 is used to drive the disc pressing device assembly 4 to rise and fall. The bottom shell 101 is also provided with a main control circuit board 114 for controlling each component; the loading motor 102 drives the lower drive assembly 3 to enter and exit the read-write bin 6 through the gear set 103. In the process of loading the optical disc, the optical disc does not contact with other components, thereby avoiding friction with other components of the optical disc box, thereby protecting the optical disc signal surface. The compact optical drive of the optical disc with dual optical heads disclosed by the present invention has a simple transmission structure, a small number of parts, a compact structure, high integration and space utilization, and can meet the needs of specific fields with limited standards or requirements for the size of the optical disc drive; it adopts an upper and lower dual drive mode, and the two drives work at the same time, which can correspond to large-capacity double-sided optical discs and has a high reading and writing rate. The cooperation of the disc pressing assembly and the disc pressing lifting assembly set in the optical disc drive can ensure the stability of the optical disc when reading and writing.

[0042] Preferably, Figure 1 , Figure 2 As shown, the platen lifting assembly 5 includes a driving pin 502 and a guide rod 503;

[0043] The platen pressing device assembly 4 includes a platen pressing device support 401 and a platen pressing device 402 arranged on the platen pressing device support 401. The platen pressing device support 401 has support side plates 403 extending downwardly at both sides thereof. The support side plates 403 have vertical sliding grooves 501 arranged on both sides thereof, and the drive pins 502 are arranged on both sides thereof.

[0044] The lower drive assembly 3 includes a lower drive base 301, and the cam groove 504 is arranged on both sides of the lower drive base 301, and the cam groove 504 is closer to one end of the lower drive assembly moving out of the read-write bin 6 than the other end, so that when the lower drive assembly 3 enters the read-write bin 6, the driving pin 502 enters the lower end of the cam groove 504 to achieve the limiting of the optical disc 7 on the lower drive assembly 3 by the disc press 402; the guide rod 503 is fixed on the bottom shell 101; the disc press assembly 4 is connected to the guide rod 503 through the groove 501 and can slide up and down along the guide rod 503; the driving pin 502 is arranged in the cam groove 504; when the lower drive base 301 enters and exits the read-write bin 6, the driving pin 502 can move in the cam groove 504 and then drive the disc press assembly 4 to move up and down along the guide rod 503. The plate press lifting assembly 5 drives the plate press assembly 4 in the vertical direction to approach or move away from the lower drive assembly 3 through the slide groove 501, the driving pin 502, the guide rod 503 and the cam slide groove 504. When the plate press assembly 4 is located directly above the lower drive assembly 3, the plate press assembly 4 can keep the optical disc 7 on the lower drive assembly 3 stably on the spindle motor 304, and the optical disc 7 will not tilt or slip due to the high-speed rotation of the spindle motor 304, thereby improving the stability of the optical disc 7 during the loading process.

[0045] Preferably, Figure 3 , Figure 4As shown, the upper drive assembly 8 has the same structure as the lower drive assembly 3, including a feed motor 801, a main shaft 802, a secondary shaft 803 and an optical head 804. The feed motor 801 can drive the optical head 804 to approach or move away from the feed motor 801 along the main shaft 802 and the secondary shaft 803. The upper drive assembly 8 can read and write the optical storage surface on the optical disc 7. The top cover assembly 2 includes a top cover 201; the feed motor 801, the main shaft 802, and the secondary shaft 803 are all fixed on the inner surface of the top cover 201, and the two ends of the optical head 804 are respectively slidably connected to the secondary shaft 803 and the main shaft 802. One end of the feed motor 801 is connected to a motor shaft 805, and the motor shaft 805 is connected to the side of the optical head 804 away from the secondary shaft 803. The feed motor 801 can drive the optical head 804 to slide along the secondary shaft 803 and the main shaft 802, and the optical head 804 can realize the function of reading the optical disc 7.

[0046] like Figure 1 , Figure 3 As shown, an indicator light 203 and an exit key 204 are provided outside the read / write bin 6 on the top cover 201. The exit key 204 is used to control the lower drive assembly 3 to enter and exit the read / write bin 6. The indicator light 203 is used to indicate the working status of the lower drive assembly 3 and the upper drive assembly 8;

[0047] Preferably, Figure 4 As shown, a rack 302 is fixed on the lower drive base 301, and a gear cavity 303 is provided on the side of the rack 302 close to the gear set 103, and the gear set 103 and the loading motor 102 are arranged in the gear cavity 303; the gear set 103 is meshed with the rack 302; the loading motor 102 drives the lower drive base 301 to enter and exit the read-write bin 6 through the gear set 103 and the rack 302. A lower drive cover plate 309 is provided on the lower drive base 301, and the optical disc 7 is arranged on the lower drive cover plate 309, and an opening is provided on the lower drive cover plate 309, and the upper end of the spindle motor 304 and the upper end of the optical head 804 on the lower drive base 301 extend from the opening, so as to read and write the optical disc 7;

[0048] The gear set 103 includes a motor gear 105, a reduction gear 106 and a loading gear 107; the reduction gear 106 includes a reduction gear upper wheel body 108 and a reduction gear lower wheel body 109 fixed on the reduction gear upper wheel body 108; the loading gear 107 includes a loading gear upper wheel body 110 and a loading gear lower wheel body 111 fixed on the loading gear upper wheel body 110;

[0049] like Figure 2 , Figure 5 As shown, the motor gear 105 is connected to the lower end of the loading motor 102, and the motor gear 105 is meshed with the reduction gear lower wheel body 109, the reduction gear upper wheel body 108 is meshed with the loading gear lower wheel body 111, and the loading gear upper wheel body 110 is meshed with the rack 302; the loading motor 102 drives the rack 302 through the motor gear 105, the reduction gear lower wheel body 109, the reduction gear upper wheel body 108, the loading gear lower wheel body 111 and the loading gear upper wheel body 110, thereby driving the lower drive assembly 3 to enter and exit the read-write bin 6.

[0050] Preferably, Figure 4 As shown, the lower drive base 301 is further provided with a spindle motor 304, and the upper end of the spindle motor 304 is provided with a chuck claw 305, and the upper end of the chuck claw 305 can extend from the middle opening of the optical disc 7 and clamp the optical disc 7. The chuck claw 305 is used to fix the optical disc 7 on the spindle motor, especially when the optical drive is placed vertically, it can prevent the optical disc 7 from falling off the spindle motor 304.

[0051] Preferably, Figure 7 As shown, a forced exit hole 306 is provided on the outer side of the lower drive base 301, and the forced exit hole 306 is communicated with the gear chamber 303, and the forced exit hole 306 corresponds to the gear set 103 located in the gear chamber 303, and the gear set driving member 113 can enter the gear chamber 303 from the forced exit hole 306, and force the gear set 103 to rotate in the opposite direction, thereby driving the lower drive assembly 3 out of the read-write chamber 6. The gear set driving member 113 is a slender hard object, which can be inserted into the forced exit hole 306, contact the loading gear 107 and drive the gear set 103 to rotate in the opposite direction, so that a small part of the lower drive assembly 3 is ejected, and then the ejected part is pulled out of the read-write chamber 6 until the optical disc 7 is completely exposed, so as to solve the problem that the optical drive fails and the optical disc cannot be ejected.

[0052] Preferably, Figure 6 As shown, the bottom shell 101 is provided with a guide rail 104;

[0053] The lower driver base 301 is provided with horizontal ribs 307 and longitudinal ribs 308 on both sides;

[0054] The top cover assembly 2 includes a top cover 201 and top cover ribs 202 disposed on both sides of the top cover 201;

[0055] The upper and lower ends of the horizontal rib plate 307 abut against the top cover rib plate 202 and the guide rail 104 respectively, and the longitudinal rib plate 308 abuts against the guide rail 104 on the side close to the horizontal rib plate 307;

[0056] Through the horizontal ribs 307 and the longitudinal ribs 308 on both sides of the lower drive base 301, under the restriction and guidance of the guide rails 104 and the top cover ribs 202, the lower drive base 301 can move in and out of the read-write bin 6 in the horizontal direction.

[0057] Preferably, Figure 4 As shown, a motor control switch 112 is provided on the bottom shell 101 ; when the lower drive assembly 3 enters and exits the read-write compartment 6 , the motor control switch 112 can be triggered or released by the lower drive base 301 to start and stop the loading motor 102 .

[0058] Specific working process: The initial state of the optical drive device of the present invention is that the lower drive assembly is in its corresponding optical disc reading and writing position in the read-write bin, and the driving pin of the disc press bracket is located in the lower slide groove of the cam slide groove of the lower drive base, that is, the disc press is in a position close to the disc press bracket, but the optical disc is not loaded at this time; the motor control switch is in a state of being triggered by the lower drive base, and the loading motor does not work at this time.

[0059] The loading motor is started by pressing the in-and-out bin button on the top cover, and the motor gear installed on the loading motor drives the reduction gear, which drives the loading gear, and the loading gear drives the rack on the lower drive base, so that the lower drive assembly is driven to move from its disc reading and writing position in the read-write bin to the disc picking position outside the read-write bin (horizontally forward), and at the same time, the lower drive base releases the motor control switch; the movement of the lower drive base causes the drive pin to slide into the upper part of the cam slot of the lower drive base, and the disc pressure device is pushed from the disc pressure position close to the lower drive base to the non-disc pressure position away from the lower drive base (vertically upward); when the lower drive assembly reaches the disc picking position outside the read-write bin, the lower drive base triggers the motor control switch again, and the loading motor stops working; at this time, place the disc on the spindle motor (lower drive The upper drive assembly is placed on the top cover of the read-write bin, and the upper drive assembly is fixed by the chuck claw on the spindle motor; the in-and-out bin button on the top cover is pressed again, and the loading motor is started to rotate in the opposite direction. Through the action of the gear set, the lower drive assembly carries the optical disc and is driven from the optical disc pick-up position outside the read-write bin to the optical disc read-write position inside the read-write bin (horizontally backward), and the lower drive base releases the motor control switch again; when the lower drive assembly is about to reach the optical disc read-write position inside the read-write bin, the drive pin slides into the lower part of the cam slot of the lower drive base, and the disc presser is also pushed to its corresponding disc presser position (vertically downward), and the lower drive assembly and the disc presser assembly will reach their respective corresponding working positions at the same time, and the disc presser will stably and reliably keep the optical disc on the spindle motor. At the same time, the lower drive base triggers the motor control switch again, and the loading motor stops working. At this point, the loading of the optical disc is completed. Since the upper drive assembly is fixedly installed at its corresponding optical disc read-write position on the top cover, it does not need to participate in any action during the whole process. Next, the upper drive assembly and the lower drive assembly can start the optical disc read-write process. The status of each major component when the optical disc is loaded in place is as follows Figure 8 shown.

[0060] After the disc is read and written, press the in-and-out bin button on the top cover and repeat the first half of the process. When the lower drive assembly carries the disc to the disc pick-up position outside the read-write bin, remove the disc from the spindle motor; press the in-and-out bin button again and repeat the second half of the process until the disc press assembly and the lower drive assembly return to their respective initial positions. At this point, the disc is unloaded. The status of the main components when the disc is unloaded is as follows: Fig. 9 shown.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compact optical drive with dual optical heads and lossless optical discs, characterized in that: It comprises a bottom shell assembly (1), a top cover assembly (2), a lower drive assembly (3), a platen pressing assembly (4), a platen pressing lifting assembly (5) and an upper drive assembly (8); The top cover assembly (2) is arranged on the bottom shell assembly (1), and a read-write compartment (6) is formed between the bottom shell assembly (1) and the top cover assembly (2); the lower drive assembly (3) and the plate pressing assembly (4) are arranged in the read-write compartment (6); the upper drive assembly (8) is fixed on the top cover assembly (2) and placed in the read-write compartment (6); The bottom shell assembly (1) comprises a bottom shell (101), and a loading motor (102) and a gear set (103) are provided on the bottom shell (101); the loading motor (102) can drive the lower drive assembly (3) to move horizontally through the gear set (103) so as to enter and exit the read-write bin (6); the upper drive assembly (8) and the lower drive assembly (3) are both used for reading and writing optical disks (7); the disc pressing device lifting assembly (5) is used for driving the disc pressing device assembly (4) to move up and down; The platen lifting assembly (5) comprises a driving pin (502) and a guide rod (503); The platen pressing device assembly (4) comprises a platen pressing device support (401) and a platen pressing device (402) arranged on the platen pressing device support (401); the platen pressing device support (401) is provided with support side plates (403) extending downwards on both sides of the periphery; the support side plates (403) are provided with vertical sliding grooves (501) on both outer sides, and the drive pins (502) are provided on both inner sides of the support side plates (403); The lower drive assembly (3) comprises a lower drive base (301), cam slide grooves (504) are arranged on both sides of the lower drive base (301), and the height of the cam slide groove (504) is lower than that of the other end close to the end of the lower drive assembly moving out of the read-write bin (6), so that when the lower drive assembly (3) enters the read-write bin (6), the driving pin (502) enters the lower end of the cam slide groove (504), so as to realize the limiting of the optical disc (7) located on the lower drive assembly (3) by the disc press (402); the guide rod (503) is fixed on the bottom shell (101); the disc press assembly (4) is connected to the guide rod (503) through the vertical slide groove (501), and can slide up and down along the guide rod (503); the driving pin (502) is arranged in the cam slide groove (504); When the lower drive base (301) moves in and out of the read-write compartment (6), the drive pin (502) can move in the cam slot (504) and drive the platen assembly (4) to move up and down along the guide rod (503).

2. A compact optical drive with dual optical heads and lossless optical disc according to claim 1, characterized in that: The upper drive assembly (8) and the lower drive assembly (3) both comprise a feed motor (801), a main shaft (802), a secondary shaft (803) and an optical head (804); the feed motor (801) can drive the optical head (804) to approach or move away from the feed motor (801) along the main shaft (802) and the secondary shaft (803); and the upper drive assembly (8) can read and write the optical storage surface on the optical disc (7).

3. A compact optical drive with a double optical head and lossless optical disc according to claim 1, characterized in that: A rack (302) is fixed on the lower drive base (301); a gear cavity (303) is provided on the side of the rack (302) close to the gear group (103); the gear group (103) and the loading motor (102) are provided in the gear cavity (303); the gear group (103) is meshed with the rack (302); the loading motor (102) drives the lower drive base (301) to enter and exit the read-write bin (6) through the gear group (103) and the rack (302).

4. A compact optical drive with a double optical head and lossless optical disc according to claim 1, characterized in that: The lower drive base (301) is also provided with a spindle motor (304), and the spindle motor (304) is provided with a chuck claw (305), and the upper end of the chuck claw (305) can extend from the middle opening of the optical disc (7) and clamp the optical disc (7).

5. The compact optical drive with dual optical heads and lossless optical disc according to claim 3, characterized in that: A forced exit hole (306) is provided on the outer side of the lower drive base (301), and the forced exit hole (306) is connected to the gear chamber (303). The forced exit hole (306) corresponds to the gear set (103) located in the gear chamber (303). The gear set driving member (113) can enter the gear chamber (303) from the forced exit hole (306) and force the gear set (103) to rotate in the opposite direction, thereby driving the lower drive assembly (3) out of the read-write chamber (6).

6. A compact optical drive with dual optical heads and lossless optical disc according to claim 1, characterized in that: The bottom shell (101) is also provided with a guide rail (104); Horizontal ribs (307) and longitudinal ribs (308) are provided on both sides of the lower driver base (301); The top cover assembly (2) comprises a top cover (201) and top cover ribs (202) arranged on both sides of the inside of the top cover (201); The upper and lower ends of the horizontal rib plate (307) are respectively in contact with the top cover rib plate (202) and the guide rail (104), and the longitudinal rib plate (308) is in contact with the guide rail (104) on the side close to the horizontal rib plate (307); Through the horizontal ribs (307) and the longitudinal ribs (308) on both sides of the lower drive base (301), under the restriction and guidance of the guide rails (104) and the top cover ribs (202), the lower drive base (301) can move in and out of the read-write bin (6) in the horizontal direction.

7. According to the compact optical drive with dual optical heads and lossless optical discs as described in claim 1, a motor control switch (112) is provided on the bottom shell (101); when the lower drive assembly (3) enters and exits the read-write compartment (6), the motor control switch (112) can be triggered or released by the lower drive base (301) to realize the start and stop of the loading motor (102).

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