Optical disc player

Abstract

The application discloses an optical disc playing device, and relates to the technical field of optical disc playing devices. The optical disc playing device has a radial direction, and comprises a body assembly and a core assembly. The body assembly has a circular body part and a avoiding part. The avoiding part is arranged on the side surface of the circular body part and protrudes from the circular body part along the radial direction. The circular body part is provided with a first mounting cavity, and the avoiding part is provided with an avoiding cavity. The first mounting cavity and the avoiding cavity are communicated. The core assembly is arranged in the first mounting cavity. The core assembly is provided with a sliding cavity. The sliding cavity extends from the center of the circular body part to the avoiding cavity along the radial direction. The core assembly comprises an optical reading head. The optical reading head slides in the sliding cavity. The optical disc playing device can reduce the overall size of the device.

Description

Technical Field

[0001] This utility model relates to the technical field of optical disc playback devices, and more specifically, to an optical disc playback device. Background Technology

[0002] The mechanism of an optical disc player consists of an optical read head, a spindle motor, and a drive motor. The spindle motor drives the optical disc to rotate, and the drive motor moves the optical read head along the radius of the disc to read data. Since optical discs are circular, the device body is usually also circular. To ensure that the optical read head covers the entire data area of ​​a 12cm disc, the device body needs to allow sufficient space for the mechanism to move. This design meets the reading requirements, but it also results in a relatively large overall diameter of the device, affecting portability and aesthetics. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide an optical disc playback device that can reduce the overall size of the device.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] This application provides an optical disc playback device having a radial direction. The optical disc playback device includes: a body assembly having a circular body portion and a clearance portion, the clearance portion being disposed on a side surface of the circular body portion and protruding from the circular body portion in the radial direction, the circular body portion having a first mounting cavity, the clearance portion having a clearance cavity, the first mounting cavity and the clearance cavity communicating; and a mechanism assembly disposed within the first mounting cavity, the mechanism assembly having a sliding cavity extending from the center of the circular body portion into the clearance cavity in the radial direction, the mechanism assembly including an optical reading head that slides within the sliding cavity.

[0006] In an optional embodiment, the optical disc playback device further has a circumferential direction. The body assembly includes a bottom cover, a top cover, side panels, and a mounting plate. The bottom cover, the mounting plate, and the top cover are spaced apart, and the mounting plate is disposed between the bottom cover and the top cover. The side panels are disposed around the bottom cover, the top cover, and the mounting plate along the circumferential direction to define a first mounting cavity and a clearance cavity between the bottom cover and the mounting plate, and a second mounting cavity between the top cover and the mounting plate.

[0007] In an optional embodiment, the movement assembly further includes a mounting bracket connected to the mounting plate and protruding from the mounting plate toward the side near the bottom cover, and the mounting bracket is at least partially located within the clearance cavity, the sliding cavity being disposed within the mounting bracket.

[0008] In an optional embodiment, the mounting plate is provided with a first clearance groove, which communicates with the second mounting cavity. The mounting bracket is also provided with a second clearance groove, which communicates with the sliding cavity through the second clearance groove. The second clearance groove extends from the center of the circular body portion into the clearance cavity along the radial direction, and the optical reading head is at least partially located in the second clearance groove.

[0009] In an optional embodiment, the optical reading head has a laser reading section located in the middle of the optical reading head, the laser reading section being located within the second clearance groove, and moving within the second clearance groove between the center of the circular body portion and the edge of the circular body portion.

[0010] In an optional embodiment, the optical disc playback device further has an axial direction, and the mechanism assembly further includes a first drive member and an optical disc mounting member. The first drive member and the optical disc mounting member are both connected to the mounting frame. The optical disc mounting member is located at the center of the circular body portion and protrudes from the mounting plate toward the second mounting cavity along the axial direction. The first drive member is drivenly connected to the optical disc mounting member and is used to drive the optical disc mounting member to rotate around the axial direction.

[0011] In an optional embodiment, the side panel has a first surrounding portion, the bottom cover has a circular cover portion, the circular cover portion is spaced apart from the top cover, and the first surrounding portion is disposed around the edge of the top cover and the circular cover portion along the circumferential direction to define the circular body portion.

[0012] In an optional embodiment, the side panel further has a second surrounding portion connected to the first surrounding portion and protruding from the first surrounding portion in the radial direction. The bottom cover further has a protruding portion connected to the circular cover portion and protruding from the circular cover portion in the radial direction. The second surrounding portion and the protruding portion are arranged to form the clearance portion.

[0013] In an optional embodiment, the top cover is movably connected to the side panel, and the top cover rotates relative to the side panel in a direction toward or away from the mounting plate.

[0014] In an optional embodiment, the mechanism assembly further includes a second drive member and a lead screw. The second drive member is connected to the circular body portion and to the lead screw. The second drive member is used to drive the lead screw to rotate about the radial direction. The lead screw is threadedly connected to the optical reading head.

[0015] The optical disc playback device of this application has the following advantages:

[0016] In the optical disc playback device of this application, a circular body portion is used to hold the optical disc, and the drive assembly can be placed in a first mounting cavity within the circular body portion so that the optical read head of the drive assembly can perform data reading operations on the optical disc. During this process, since the sliding cavity of the drive assembly extends radially from the center of the circular body portion to the clearance cavity, and the optical read head slides within the sliding cavity, while the clearance portion protrudes radially from the circular body portion, the clearance cavity prevents the optical read head from interfering with the body assembly when it moves towards the edge of the circular body portion. This ensures that the movement range of the optical read head covers the entire data area of ​​the optical disc, thereby guaranteeing optimal signal reading quality. Furthermore, it reduces the diameter of the circular body portion, eliminating the need to extend its diameter to the outer edge of the clearance portion, thus reducing the overall size of the optical disc playback device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural diagram of the optical disc playback device of this application is shown. Figure 1 ;

[0019] Figure 2 A three-dimensional structural diagram of the optical disc playback device of this application is shown. Figure 2 ;

[0020] Figure 3 A three-dimensional cross-sectional view of the optical disc playback device of this application is shown;

[0021] Figure 4 This application shows a schematic diagram of the structure of the side panel, mounting plate, and movement assembly.

[0022] Figure 5 A three-dimensional structural diagram of the mounting plate and movement assembly in this application is shown;

[0023] Figure 6 A schematic diagram of the bottom cover structure in this application is shown;

[0024] Figure 7 A three-dimensional structural schematic diagram of the side panel in this application is shown.

[0025] Explanation of key component symbols:

[0026] 10 - Optical disc playback device;

[0027] 100 - Fuselage assembly; 110 - Circular fuselage section; 111 - First mounting cavity; 112 - Second mounting cavity; 120 - Clearance section; 121 - Clearance cavity; 130 - Bottom cover; 131 - Circular cover section; 132 - Protrusion; 140 - Top cover; 150 - Side panel; 151 - First enclosure section; 152 - Second enclosure section; 160 - Mounting plate; 161 - First clearance groove;

[0028] 200-Motion mechanism assembly; 210-Sliding cavity; 220-Optical reading head; 221-Laser reading unit; 230-Mounting bracket; 231-Second clearance groove; 240-First driving component; 250-Optical disc mounting component; 260-Second driving component; 270-Lead screw; 280-Power supply;

[0029] 20-CD;

[0030] x - radial direction; y - circumferential direction; z - axial direction. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] Reference Figure 1 , Figure 3 as well as Figure 4 As shown, the optical disc playback device 10 involved in the embodiments of this application has a radial direction x, and the optical disc playback device 10 includes: a body assembly 100 and a mechanism assembly 200.

[0037] Specifically, the body assembly 100 has a circular body portion 110 and a clearance portion 120. The clearance portion 120 is disposed on the side surface of the circular body portion 110 and protrudes from the circular body portion 110 in the radial direction x. The circular body portion 110 is provided with a first mounting cavity 111, and the clearance portion 120 is provided with a clearance cavity 121. The first mounting cavity 111 and the clearance cavity 121 are in communication. The mechanism assembly 200 is disposed in the first mounting cavity 111. The mechanism assembly 200 is provided with a sliding cavity 210. The sliding cavity 210 extends from the center of the circular body portion 110 to the clearance cavity 121 in the radial direction x. The mechanism assembly 200 includes an optical reading head 220, which slides in the sliding cavity 210.

[0038] It should be noted that the radial direction x is Figure 3 The direction indicated by x in the middle.

[0039] In the optical disc playback device 10 of this application, the circular body 110 is used to place the optical disc 20, and the mechanism assembly 200 can be placed in the first mounting cavity 111 of the circular body 110 so that the optical reading head 220 of the mechanism assembly 200 can perform data reading operation on the optical disc 20. In this process, since the sliding cavity 210 of the mechanism assembly 200 extends from the center of the circular body portion 110 to the clearance cavity 121 in the radial direction x, and the optical reading head 220 slides in the sliding cavity 210, while the clearance portion 120 protrudes from the circular body portion 110 in the radial direction x, the clearance cavity 121 can prevent the optical reading head 220 from interfering with the body assembly 100 when it moves toward the edge of the circular body portion 110, so as to ensure that the movement range of the optical reading head 220 covers the entire data area of ​​the optical disc 20, thereby ensuring the best signal reading quality. At the same time, it can also reduce the diameter of the circular body portion 110, so that the diameter of the circular body portion 110 does not need to be extended to the outer edge of the clearance portion 120, thereby reducing the overall size of the optical disc playback device 10.

[0040] Reference Figure 2 as well as Figure 3 As shown, the optical disc playback device 10 also has a circumferential direction y. The body assembly 100 includes a bottom cover 130, a top cover 140, a side panel 150, and a mounting plate 160. The bottom cover 130, the mounting plate 160, and the top cover 140 are spaced apart, and the mounting plate 160 is disposed between the bottom cover 130 and the top cover 140. The side panel 150 is disposed around the bottom cover 130, the top cover 140, and the mounting plate 160 along the circumferential direction y, so as to define a first mounting cavity 111 and a clearance cavity 121 between the bottom cover 130 and the mounting plate 160, and to define a second mounting cavity 112 between the top cover 140 and the mounting plate 160.

[0041] It should be noted that the circumferential direction y is Figure 1 The direction indicated by y in the middle.

[0042] In this embodiment, a second mounting cavity 112 can be formed by the side panel 150, the top cover 140, and the mounting plate 160 to place the optical disc 20 in the second mounting cavity 112. At the same time, a first mounting cavity 111 and a clearance cavity 121 can be formed by the side panel 150, the bottom cover 130, and the mounting plate 160 to accommodate the mechanism assembly 200 in the first mounting cavity 111 and facilitate the movement of the optical reading head 220 in the radial direction x between the center of the circular body 110 and the clearance cavity 121, thereby enabling the optical reading head 220 to read data from the optical disc 20.

[0043] Reference Figure 3 as well as Figure 4As shown, the movement assembly 200 also includes a mounting bracket 230, which is connected to the mounting plate 160 and protrudes from the mounting plate 160 toward the side near the bottom cover 130. The mounting bracket 230 is at least partially located in the clearance cavity 121, and the sliding cavity 210 is disposed in the mounting bracket 230.

[0044] In this embodiment, since the mounting bracket 230 is connected to the mounting plate 160 and is at least partially located within the clearance cavity 121, and the sliding cavity 210 is disposed within the mounting bracket 230, the optical reading head 220 can be connected to the mounting bracket 230, thereby realizing the connection between the optical reading head 220 and the mounting plate 160, and thus realizing the connection between the optical reading head 220 and the body assembly 100, improving the structural stability of the optical reading head 220. At the same time, the optical reading head 220 can be slidably connected to the mounting bracket 230, and the optical reading head 220 can move relative to the mounting bracket 230 in the radial direction x, thereby realizing the optical reading head 220 reading data from the optical disc 20.

[0045] Reference Figures 3 to 5 As shown, the mounting plate 160 is provided with a first clearance groove 161, which is connected to the second mounting cavity 112. The mounting bracket 230 is also provided with a second clearance groove 231. The first clearance groove 161 is connected to the sliding cavity 210 through the second clearance groove 231. The second clearance groove 231 extends from the center of the circular body part 110 to the clearance cavity 121 in the radial direction x. The optical reading head 220 is at least partially located in the second clearance groove 231.

[0046] In this embodiment, since the first clearance groove 161 is connected to the second mounting cavity 112, and the first clearance groove 161 is connected to the sliding cavity 210 through the second clearance groove 231, the sliding cavity 210 and the second mounting cavity 112 can be connected. Since the optical reading head 220 is at least partially located in the second clearance groove 231, the optical reading head 220 located in the sliding cavity 210 can be at least partially exposed in the second mounting cavity 112, thereby enabling the optical reading head 220 to read data from the optical disc 20 in the second mounting cavity 112.

[0047] Reference Figure 4 as well as Figure 5 As shown, the optical reading head 220 has a laser reading section 221, which is located in the middle of the optical reading head 220. The laser reading section 221 is located in the second clearance groove 231 and moves between the center of the circular body section 110 and the edge of the circular body section 110 within the second clearance groove 231.

[0048] Specifically, the mechanism assembly 200 also includes a motherboard. The optical reading head 220 is electrically connected to the motherboard. When reading data from the optical disc 20, the laser reading section 221 of the optical reading head 220 emits a laser towards the optical disc 20. The surface of the optical disc 20 has uneven data pits and flat areas. When the laser shines on these different areas, the intensity of the reflected light will change. The detector converts the light signal into a corresponding electrical signal according to the intensity of the reflected light. The signal represents the original stored digital data. The motherboard amplifies, filters, and decodes these electrical signals, and finally restores them into user-recognizable information such as audio, video, or file data.

[0049] Specifically, refer to Figure 4 As shown, the mechanism assembly 200 also includes a power supply 280, which is electrically connected to the motherboard to supply power to the motherboard.

[0050] In this embodiment, since the laser reading unit 221 is located within the second clearance groove 231 and moves between the center and the edge of the circular housing 110 within the second clearance groove 231, it facilitates data reading from the optical disc by the laser reading unit 221, while ensuring that the movement range of the laser reading unit 221 covers the entire data area of ​​the optical disc 20. Furthermore, since the laser reading unit 221 is located in the middle of the optical reading head 220, when the optical reading head 220 moves radially x toward the edge of the circular housing 110, the edge of the optical reading unit will extend beyond the edge of the circular housing 110. At this time, the clearance cavity 121 can avoid interference between the edge of the optical reading unit and the housing assembly 100, thereby ensuring that the movement range of the laser reading unit 221 covers the entire data area of ​​the optical disc 20.

[0051] Reference Figure 4 As shown, the optical disc playback device 10 also has an axial direction z. The mechanism assembly 200 also includes a first drive member 240 and an optical disc mounting member 250. Both the first drive member 240 and the optical disc mounting member 250 are connected to the mounting frame 230. The optical disc mounting member 250 is located at the center of the circular body portion 110 and protrudes from the mounting plate 160 toward the second mounting cavity 112 along the axial direction z. The first drive member 240 is drivenly connected to the optical disc mounting member 250 and is used to drive the optical disc mounting member 250 to rotate around the axial direction z.

[0052] It should be noted that the axial direction z is Figure 3 The direction indicated by z in the middle.

[0053] In this embodiment, since the optical disc mounting component 250 is located at the center of the circular body portion 110 and protrudes from the mounting plate 160 towards the second mounting cavity 112 in the axial direction z, the optical disc 20 can be snapped onto the optical disc mounting component 250, thereby improving the installation stability of the optical disc 20 in the second mounting cavity 112. Furthermore, since the first driving component 240 is drivenly connected to the optical disc mounting component 250 and is used to drive the optical disc mounting component 250 to rotate around the axial direction z, when the first driving component 240 drives the optical disc mounting component 250 to rotate around the axial direction z, the optical disc 20 can be driven to rotate around the axial direction z through the optical disc mounting component 250, thereby realizing the laser reading unit 221 to read data from the entire area of ​​the optical disc 20.

[0054] Reference Figure 6 as well as Figure 7 As shown, the side panel 150 has a first surrounding portion 151, the bottom cover 130 has a circular cover portion 131, the circular cover portion 131 and the top cover 140 are spaced apart, and the first surrounding portion 151 is provided around the edge of the top cover 140 and the circular cover portion 131 along the circumferential direction y to define the circular body portion 110.

[0055] In this embodiment, the first surrounding portion 151 can be arranged around the edge of the top cover 140 and the circular cover portion 131 in the circumferential direction y, thereby defining the circular body portion 110 and determining the overall size of the optical disc playback device 10, that is, it only needs to meet the requirement of accommodating the standard optical disc 20.

[0056] Continue to refer to Figure 6 as well as Figure 7 As shown, the side panel 150 also has a second surrounding portion 152, which is connected to the first surrounding portion 151 and protrudes from the first surrounding portion 151 in the radial direction x. The bottom cover 130 also has a protrusion 132, which is connected to the circular cover portion 131 and protrudes from the circular cover portion 131 in the radial direction x. The second surrounding portion 152 and the protrusion 132 surround each other to form a clearance portion 120.

[0057] In this embodiment, since the second surrounding portion 152 protrudes from the first surrounding portion 151 in the radial direction x, and the protruding portion 132 protrudes from the circular cover portion 131 in the radial direction x, the avoidance portion 120 formed by the second surrounding portion 152 and the protruding portion 132 protrudes from the circular body portion 110 in the radial direction x. Thus, the avoidance portion 120 can simultaneously meet the movement requirements of the optical reading head 220 and the requirement to reduce the overall size of the optical disc playback device 10.

[0058] Reference Figure 1 as well as Figure 2As shown, the top cover 140 is movably connected to the side panel 150, and the top cover 140 rotates relative to the side panel 150 in a direction that is closer to or further away from the mounting plate 160.

[0059] In this embodiment, when the top cover 140 rotates relative to the side panel 150 toward a direction away from the mounting plate 160, the second mounting cavity 112 can be opened, at which time the optical disc 20 can be installed or removed. When the top cover 140 rotates relative to the side panel 150 toward a direction closer to the mounting plate 160, the second mounting cavity 112 can be closed, at which time the optical disc 20 can be fixed in the second mounting cavity 112, so that the optical reading head 220 can read data from the optical disc 20 and perform the optical disc 20 playback operation.

[0060] Reference Figure 4 As shown, the mechanism assembly 200 also includes a second drive member 260 and a lead screw 270. The second drive member 260 is connected to the circular body part 110 and to the lead screw 270. The second drive member 260 is used to drive the lead screw 270 to rotate about the radial direction x. The lead screw 270 is threadedly connected to the optical reading head 220.

[0061] Specifically, in this embodiment, the second drive member 260 and the lead screw 270 are both connected to the mounting bracket 230 to fix the second drive member 260 and the lead screw 270.

[0062] In this embodiment, since the second driving member 260 is used to drive the lead screw 270 to rotate around the radial direction x, and the lead screw 270 is threadedly connected to the optical reading head 220, when the second driving member 260 drives the lead screw 270 to rotate around the radial direction x, the optical reading head 220 can move along the radial direction x on the lead screw 270, thereby realizing the movement of the optical reading head 220 along the radial direction of the optical disc 20, thereby realizing the optical reading head 220 reading data from the optical disc 20.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A CD playback device, characterized in that, Having a radial direction (x), the optical disc playback device (10) includes: The fuselage assembly (100) has a circular fuselage portion (110) and a clearance portion (120). The clearance portion (120) is disposed on the side surface of the circular fuselage portion (110) and protrudes from the circular fuselage portion (110) in the radial direction (x). The circular fuselage portion (110) is provided with a first mounting cavity (111), and the clearance portion (120) is provided with a clearance cavity (121). The first mounting cavity (111) communicates with the clearance cavity (121). The mechanism assembly (200) is disposed in the first mounting cavity (111). The mechanism assembly (200) is provided with a sliding cavity (210). The sliding cavity (210) extends from the center of the circular body part (110) to the clearance cavity (121) along the radial direction (x). The mechanism assembly (200) includes an optical reading head (220) that slides in the sliding cavity (210).

2. The optical disc playback device according to claim 1, characterized in that, The optical disc playback device (10) also has a circumferential direction (y). The body assembly (100) includes a bottom cover (130), a top cover (140), a side panel (150), and a mounting plate (160). The bottom cover (130), the mounting plate (160), and the top cover (140) are spaced apart, and the mounting plate (160) is disposed between the bottom cover (130) and the top cover (140). The side panel (150) is disposed along the circumferential direction (y) around the bottom cover (130), the top cover (140), and the mounting plate (160) to define a first mounting cavity (111) and a clearance cavity (121) between the bottom cover (130) and the mounting plate (160), and to define a second mounting cavity (112) between the top cover (140) and the mounting plate (160).

3. The optical disc playback device according to claim 2, characterized in that, The movement assembly (200) also includes a mounting bracket (230) connected to the mounting plate (160) and protruding from the mounting plate (160) toward the side near the bottom cover (130), and the mounting bracket (230) is at least partially located within the clearance cavity (121), and the sliding cavity (210) is disposed within the mounting bracket (230).

4. The optical disc playback device according to claim 3, characterized in that, The mounting plate (160) is provided with a first clearance groove (161), which is connected to the second mounting cavity (112). The mounting bracket (230) is also provided with a second clearance groove (231), which is connected to the sliding cavity (210) through the second clearance groove (231). The second clearance groove (231) extends from the center of the circular body part (110) to the clearance cavity (121) along the radial direction (x). The optical reading head (220) is at least partially located in the second clearance groove (231).

5. The optical disc playback device according to claim 4, characterized in that, The optical reading head (220) has a laser reading section (221) located in the middle of the optical reading head (220). The laser reading section (221) is located in the second clearance groove (231) and moves within the second clearance groove (231) between the center of the circular body part (110) and the edge of the circular body part (110).

6. The optical disc playback device according to claim 3, characterized in that, The optical disc playback device (10) also has an axial direction (z). The mechanism assembly (200) further includes a first drive member (240) and an optical disc mounting member (250). The first drive member (240) and the optical disc mounting member (250) are both connected to the mounting frame (230). The optical disc mounting member (250) is located at the center of the circular body part (110) and protrudes from the mounting plate (160) toward the second mounting cavity (112) along the axial direction (z). The first drive member (240) is driven to connect with the optical disc mounting member (250) and is used to drive the optical disc mounting member (250) to rotate around the axial direction (z).

7. The optical disc playback device according to claim 2, characterized in that, The side panel (150) has a first surrounding portion (151), and the bottom cover (130) has a circular cover portion (131). The circular cover portion (131) is spaced apart from the top cover (140). The first surrounding portion (151) is disposed along the circumferential direction (y) around the edge of the top cover (140) and the circular cover portion (131) to define the circular body portion (110).

8. The optical disc playback device according to claim 7, characterized in that, The side panel (150) also has a second enclosure (152), which is connected to the first enclosure (151) and protrudes from the first enclosure (151) in the radial direction (x). The bottom cover (130) also has a protrusion (132), which is connected to the circular cover (131) and protrudes from the circular cover (131) in the radial direction (x). The second enclosure (152) and the protrusion (132) surround each other to form the clearance portion (120).

9. The optical disc playback device according to claim 2, characterized in that, The top cover (140) is movably connected to the side panel (150), and the top cover (140) rotates relative to the side panel (150) in a direction toward or away from the mounting plate (160).

10. The optical disc playback device according to claim 1, characterized in that, The mechanism assembly (200) further includes a second drive member (260) and a lead screw (270). The second drive member (260) is connected to the circular body part (110) and to the lead screw (270). The second drive member (260) is used to drive the lead screw (270) to rotate about the radial direction (x). The lead screw (270) is threadedly connected to the optical reading head (220).

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