Optical disc drive and electronic device

Abstract

The present invention provides an optical disk drive capable of guiding the center of an optical disk to the position of a spindle motor while reducing the number of components. A base frame (2) includes stop portions (26a, 26b) that contact the outer edge of the optical disk that has reached the position of the spindle motor (11) and restrict the backward movement of the optical disk. A switching arm (80) includes contact portions (82a, 82b) that are located on the side opposite the stop portions (26a, 26b) in the case where the optical disk has reached the position of the spindle motor (11) and is interposed therebetween. The switching arm (80) pushes the optical disk toward the stop portions (26a, 26b) with the contact portions (82a, 82b).

Description

Technical Field

[0001] This invention relates to an optical disc drive and an electronic device. Background Technology

[0002] Patent Documents 1 and 2, listed below, both disclose an optical disc drive that can be installed in electronic devices such as game consoles, personal computers, or audiovisual (AV) devices. The optical disc drive includes a transport roller that contacts an optical disc inserted through an insertion port formed in the front surface of the optical disc drive and transports the optical disc to a position on the spindle motor, and a clamping pulley that magnetically secures the optical disc, once it has reached the position on the spindle motor, to the spindle motor.

[0003] [List of Citations]

[0004] [Patent Literature]

[0005] [Patent Document 1] JP 2015-022780A

[0006] [Patent Document 2] JP 2015-022779A Summary of the Invention

[0007] [Technical Issues]

[0008] The optical disc drives disclosed in Patent Documents 1 and 2 each include a mechanism for guiding the center of the optical disc to the position of the spindle motor. However, this mechanism is implemented using multiple arms, thus resulting in a large number of parts in each optical disc drive.

[0009] The purpose of this invention is to provide an optical disc drive that can guide the center of the optical disc to the position of the spindle motor while reducing the number of components.

[0010] [Solution to the problem]

[0011] The optical disc drive according to the present invention includes an insertion port configured to receive an optical disc, a spindle motor located behind and away from the insertion port, a mechanism configured to convey an optical disc inserted through the insertion port to a position on the spindle motor, a frame including a stop portion configured to contact the outer edge of the optical disc that has reached the position on the spindle motor to limit backward movement of the optical disc, and a biasing member including a contact portion spanning the optical disc that has reached the position on the spindle motor on a side opposite to the stop portion, the biasing member being configured to push the optical disc toward the stop portion using the contact portion. According to the present invention, the center of the optical disc can be guided to the position on the spindle motor, while reducing the number of components. Attached Figure Description

[0012] Figure 1 This is an exploded perspective view of an optical disc drive 1 according to an embodiment of the present invention.

[0013] Figure 2A This is a top view of the base frame.

[0014] Figure 2B This is a perspective view of the base frame.

[0015] Figure 2C It is along Figure 2A The sectional view is taken by line cc.

[0016] Figure 3 It is an exploded perspective view depicting the top frame and the components arranged in the top frame.

[0017] Figure 4 It is a perspective view showing the components of the transmission mechanism.

[0018] Figure 5 This is a rear view of the conveyor rollers and roller supports.

[0019] Figure 6 This is a magnified view of the right side of the chassis.

[0020] Figure 7 It is an exploded perspective view showing the loaded motor and gears.

[0021] Figure 8 This is a left-side view of the gear and roller support.

[0022] Figure 9A This is a left-side view of the slider, gear, and roller support, depicting the slider in its first sliding position.

[0023] Figure 9B This is a left-side view of the slider, gear, and roller support, depicting the slider in its second sliding position.

[0024] Figure 10A This is a top view of the top shelf, showing the optical disc drive without any discs in it.

[0025] Figure 10B It is along Figure 10A The sectional view taken by the line bb.

[0026] Figure 11 This is a top view of the top shelf, showing the optical disc inserted into the optical disc drive slot.

[0027] Figure 12A This is a top view of the top shelf, showing the position where the optical disc is placed in the optical disc drive.

[0028] Figure 12B It is along Figure 12A The sectional view shown is taken by line bb.

[0029] Figure 13 This is a perspective view showing the back of the switching arm and the rotating arm.

[0030] Figure 14 This is a perspective view of the base frame and the top frame.

[0031] Figure 15 This is an exploded perspective view of the framework.

[0032] Figure 16A This is the bottom view of the bottom shell.

[0033] Figure 16B It is along Figure 16A The cross-sectional view shown is taken from line bb. Detailed Implementation

[0034] Embodiments of the present invention will now be described with reference to the accompanying drawings. Figure 1 This is an exploded perspective view of an optical disc drive 1 according to an embodiment of the present invention. In the following description, Figure 1 X1 and X2, as depicted, are described as left and right directions, Y1 and Y2 as forward and backward directions, and Z1 and Z2 as up and down directions. In this embodiment, the axis CB of the spindle motor 11 (described later) is... Figure 10B , Figure 12B In the case of a disc placed on the spindle motor 11, the direction from the spindle motor 11 toward the disc is assumed to be "upward," and the opposite direction is assumed to be "downward." Furthermore, in the direction perpendicular to the axis CB of the spindle motor 11, the direction in which the insertion port is located relative to the spindle motor 11 is assumed to be "forward," and the opposite direction is considered "backward." Additionally, it is assumed that the plane perpendicular to the axis CB of the spindle motor 11 is a horizontal plane. Furthermore, in the component (part), the uppermost position, lowermost position, leftmost position, rightmost position, frontmost position, and rearmost position are assumed to be upper, lower, left, right, front, and rear, respectively. Furthermore, a portion of a component that includes at least the upper, lower, left, right, front, or rear end is assumed to be upper end, lower end, left end, right end, front end, or rear end, respectively.

[0035] <1. Structure of an optical disc drive>

[0036] Optical disc drive 1 is housed within the casing of electronic devices such as game consoles, personal computers, and AV equipment. For example... Figure 1 As shown, the optical disc drive 1 includes a base 2 (base unit). The base 2 is typically plate-shaped, and the optical disc is placed on the base 2. The base 2 includes a spindle motor 11 that serves as a turntable for rotating the optical disc. The spindle motor 11 revolves around an axis CB perpendicular to the upper surface of the base 2 (see figure). Figure 10B and 12BRotation. In addition, the base frame 2 includes a circuit board for mounting the spindle motor 11, an optical pickup (optical element), a motor for moving the optical pickup in the back-and-forth direction, etc.

[0037] Note that optical discs include, for example, compact discs (CDs), digital multifunction discs (DVDs), Blu-ray discs (registered trademarks), etc. The optical disc drive 1 described in this embodiment corresponds to an optical disc with a diameter of 12 cm.

[0038] In addition, the optical disc drive 1 includes a chassis 3. For example... Figure 1 As shown, the base frame 3 is box-shaped, and various components such as the base frame 2 are arranged inside the base frame 3. Additionally, the optical disc drive 1 includes a top frame 4 attached to the upper side of the base frame 3. The top frame 4 is typically plate-shaped and attached to the base frame 3, forming a structure together with the base frame 3 that houses the base frame 2, the transfer roller 20, the roller support 50, the loading motor 60, and the gears 61a to 61g (described later). Figure 7 The inner shell of the frame 3. The base frame 3 and the top frame 4 may include resin.

[0039] Figure 2A This is a top view of base frame 3. Figure 2A This is a perspective view of base frame 3. Figure 2A and 2B The base frame 3, in which various components are housed, is depicted. For example... Figure 2A and 2B As shown, the base frame 2 and the roller support 50 to which the conveyor roller 20 is attached are disposed inside the base frame 3. In addition, the slider 70 is disposed outside the base frame 3.

[0040] The base frame 3 is box-shaped and includes a rectangular cutout 31 at its upper front edge. The cutout 31 and the lower edge (generally plate-shaped) of the front end of the top frame 4 form an insertion port into which an optical disc is inserted. The optical disc inserted into the insertion port is placed between the base frame 3 and the top frame 4. More specifically, the optical disc is placed between the transfer roller 20 located within the base frame 3 and the top frame 4, and is conveyed by a transfer mechanism A (e.g., transfer roller 20), and thus positioned between the base frame 2 and the top frame 4 disposed within the base frame 3.

[0041] Figure 3 This is an exploded perspective view depicting the top frame 4 and the components housed within it. (Example) Figure 3 As shown, the clamping pulley 12, switch plate 15, switching arm 80, rotating arm 90, first limiting arm 110, second limiting arm 120, and multiple springs 85, 96, and 116 are arranged in the top frame 4. Each component will be described in detail below.

[0042] In addition, such as Figure 1As shown, the optical disc drive 1 includes a bottom shell 5 and a cover 6, which are components of the outer casing corresponding to the outermost shell of the optical disc drive 1. The bottom shell 5 is box-shaped, and the inner shell, including the base frame 3 and the top frame 4, is housed within the bottom shell 5. In this way, the outer shell (bottom shell 5 and cover 6) covers the entire inner shell (base frame 3 and top frame 4), thereby preventing dust from entering the interior of the optical disc drive 1 or the interior of the base frame 3. Furthermore, the bottom shell 5 and cover 6 can be made of metal. This allows for the suppression of electromagnetic waves entering the interior of the optical disc drive 1 and leakage from the optical disc drive 1.

[0043] A rectangular hole H is formed in the front surface of the bottom case 5. When viewed from the front, the optical disc drive 1 overlaps with the cutout 31 formed in the base frame 3 and together with the cutout 31 forms an insertion port for the optical disc drive. In other words, the optical disc drive 1 includes a bottom case 5 and a base frame 3 corresponding to the component provided with the insertion port.

[0044] Furthermore, the optical disc drive 1 includes a transport mechanism A for transporting optical discs, a centering mechanism B for aligning optical discs, a clamping mechanism C for securing optical discs, and a vibration suppression mechanism D for suppressing vibrations of the optical disc drive 1. The transport mechanism A is configured to transport an optical disc inserted from the outside of the optical disc drive 1 into the insertion slot to the position of the spindle motor 11, and to transport an optical disc placed on the spindle motor 11 to the outside of the insertion slot. The centering mechanism B is a mechanism for positioning the optical disc such that the center position of the optical disc is aligned with the position of the axis CB corresponding to the rotation center of the spindle motor 11 (hereinafter also referred to as the drive position). The clamping mechanism C is a mechanism for securing the optical disc in the drive position. The vibration suppression mechanism D is a mechanism for suppressing the transmission of vibrations occurring in the base frame 2 when the optical disc rotates in the drive position to the inner shell (base frame 3 and top frame 4) and the outer shell (bottom shell 5 and cover 6). In this embodiment, the transport mechanism A is disposed on the base frame 3, the centering mechanism B is disposed on the base frame 2 and the top frame 4, the centering mechanism C is disposed on the top frame 4, and the vibration suppression mechanism D is disposed in the base frame 2, the base frame 3, and the bottom shell 5. The following will describe the conveying mechanism A, the centering mechanism B, the clamping mechanism C, and the vibration suppression mechanism D.

[0045] <2. Conveying Mechanism>

[0046] The conveying mechanism A will be described. The conveying mechanism A includes a conveying roller 20 that conveys an optical disc inserted through the insertion port of the optical disc drive 1 to the position of the spindle motor 11. The conveying roller 20 is arranged to contact the optical disc inserted into the insertion port of the optical disc drive 1 (the space between the cutout 31 of the base frame 3 and the top frame 4). In this embodiment, the conveying roller 20 is located below the conveying path through which the optical disc travels. Therefore, the conveying roller 20 contacts the lower surface of the optical disc and conveys the optical disc in the back-to-back direction.

[0047] The base frame 2 is located inside the base frame 3, and the spindle motor 11, which is installed in the base frame 2, is located behind and away from the cutout 31 that forms the insertion port in the base frame 3. In addition, inside the base frame 3, the conveyor roller 20, which is attached to the roller bracket 50, is arranged in front of the base frame 2.

[0048] like Figure 2B As shown, the optical disc drive 1 includes a spring 25 configured to bias the transport roller 20 in the direction (upward in this case) toward the transport path through which the optical disc passes. The spring 25 is attached to a hole 53 formed on the left side of the roller holder 50 relative to the center of the roller holder 50. The spring 25 biases the roller holder 50 and the transport roller 20 to position the transport roller 20 in a transport position. This causes the transport rollers 20 (the left roller 21L and right roller 21R described below) to contact the lower surface of the optical disc.

[0049] The transport mechanism A operates by power received from the loading motor 60. With the transport position in contact with the lower surface of the optical disc, the transport roller 20 rotates via the power from the loading motor 60, transporting the optical disc inserted through the insertion slot (cutout 31 of the bottom frame 3) toward the spindle motor 11. The transport roller 20 can be moved between a transport position (first roller position) where it contacts and transports the optical disc, and a retracted position (second roller position) away from the transport position, via a transport roller position operation mechanism described later. The retracted position is where the transport roller 20 is below and away from the optical disc's transport path and is not in contact with the optical disc.

[0050] Figure 4 This is a perspective view showing the components of the conveying mechanism A. For example... Figure 4 As shown, the conveyor roller 20 includes a left roller 21L (left roller portion) rotatable about axis CL (first axis) and a right roller 21R (right roller portion) rotatable about axis CR (second axis), with the left roller 21L and right roller 21R arranged in the transverse direction. The left roller 21L and right roller 21R are separately formed cylindrical members. Therefore, the left roller 21L and right roller 21R, as separate members as described above, can be easily formed.

[0051] The conveyor roller 20 is positioned below the top frame 4. For example... Figure 3 As shown, the top frame 4 includes openings 41L and 41R at positions corresponding to the left roller 21L and right roller 21R that constitute the conveyor roller 20, respectively. When the conveyor roller 20 is in the conveying position, the outer portions of the left roller 21L and right roller 21R are placed in the openings 41L and 41R, respectively.

[0052] like Figure 4As shown, the left roller 21L has a shaft portion 22L at its left end and a connecting portion 23L at its right end. Similarly, the right roller 21R has a shaft portion 22R at its right end and a connecting portion 23R at its left end. The left roller 21L and the right roller 21R are connected by connecting portions 23L and 23R. The connecting portion 23L is fixed to the left roller 21L, and its top end is formed in a frame shape. Similarly, the connecting portion 23R is fixed to the right roller 21R, and its top end is also formed in a frame shape. At the center of the conveyor roller 20, the connecting portions 23L and 23R are connected to each other by fitting the top end of one of them into the frame of the other. The left roller 21L and the right roller 21R may have the same frame shape.

[0053] By connecting the connecting parts 23L and 23R to each other, the first end corresponding to one of the left end of the left roller 21L and the right end of the right roller 21R can move vertically relative to the second end corresponding to the other end, while the relative positions of axes CL and CR remain unchanged. In this case, with the connecting parts 23L and 23R fixed to the support parts 51Lb and 51Rb respectively and the angle between axes CL and CR remaining unchanged, the first end can move vertically relative to the second end. Therefore, when the user inserts an optical disc, even if the optical disc is not horizontally aligned, the left end of the left roller 21L or the right end of the right roller 21R moves vertically, maintaining the angle between the rollers. Thus, the left roller 21L and the right roller 21R contact the optical disc in a predetermined area, allowing the optical disc to remain clamped. Furthermore, for example, compared to a structure where the left roller 21L and the right roller 21R move independently to change the relative positions of axes CL and CR, this embodiment, which keeps the relative positions of axes CL and CR unchanged, has a simpler structure and can reduce the number of components in the optical disc drive 1.

[0054] The left roller 21L and right roller 21R constituting the transfer roller 20 are attached to a single roller bracket 50 and rotatably supported by the roller bracket 50. As described above, the left roller 21L and right roller 21R are supported by a single roller bracket 50, which reduces the number of components in the optical disc drive 1 compared to a structure in which, for example, two brackets support the left roller 21L and right roller 21R respectively.

[0055] Figure 5 This is a rear view of the conveyor roller 20 and the roller support 50. (See image.) Figure 4 and Figure 5 As shown, the roller support 50 includes a support portion 51La for supporting the shaft portion 22L of the left roller 21L, a support portion 51Lb for supporting the connecting portion 23L of the left roller 21L, a support portion 51Ra for supporting the shaft portion 22R of the right roller 21R, and a support portion 51Rb for supporting the connecting portion 23R of the right roller 21R. Figure 4 and the following Figure 8As shown, the support portion 51La is annular. Additionally, the support portions 51Lb and 51Rb are upward-opening arc shapes. The shaft portion 22L and the connecting portions 23L and 23R are assembled inside the support portions 51Lb and 51Rb. Furthermore, the support portion 51Ra is a protrusion assembled in a hole formed at the right end of the shaft portion 22R of the right roller 21R.

[0056] The support portions 51Lb and 51Rb of the connecting portion 23L supporting the left roller 21L and the connecting portion 23R supporting the right roller 21R are located below the support portions 51La and 51Ra of the shaft portion 22L supporting the left roller 21L and the shaft portion 22R supporting the right roller 21R. Therefore, the axis CL of the left roller 21L and the axis CR of the right roller 21R are inclined relative to the horizontal plane (the plane perpendicular to the axis CB of the main spindle motor 11). Figure 5 As shown, a disc-shaped optical disc O is inserted horizontally into the insertion port of the optical disc drive 1 and transported to the position of the spindle motor 11. As a result, the axis CL of the left roller 21L and the axis CR of the right roller 21R are tilted relative to the optical disc O placed on the transfer roller 20.

[0057] The axis CL of the left roller 21L is tilted such that the distance between the axis CL and the optical disc O gradually increases from the left end of the transfer roller 20 toward the center of the transfer roller 20. Similarly, the axis CR of the right roller 21R is tilted such that the distance between the axis CR and the optical disc O gradually increases from the right end of the transfer roller 20 toward the center of the transfer roller 20. Because the axes CL and CR of the left roller 21L and the right roller 21R are tilted as described above, the left roller 21L and the right roller 21R can contact the optical disc O, except for the area of ​​the optical disc O where data is recorded (a circular area with a radius corresponding to a predetermined distance from the center of the optical disc O).

[0058] One of the left and right ends of the roller support 50 can move relative to the other in the vertical direction. Therefore, one of the left ends of the left roller 21L and the right ends of the right roller 21R (the first end) can move in the vertical direction relative to the other end (the second end). In this embodiment, the shaft portion 22R corresponding to the right end of the right roller 21R can move in the vertical direction relative to the shaft portion 22L corresponding to the left end of the left roller 21L.

[0059] The left and right ends of the roller support 50 are supported by the base frame 3. For example... Figure 4 As shown, the roller support 50 has a shaft portion 52L at its left end and a shaft portion 52R at its right end. The roller support 50 includes an axis CA in the transverse direction and is rotatable along the axis CA. The shaft portions 52L and 52R are cylindrical protrusions protruding to the left and right of the roller support 50, respectively, located on the axis CA of the roller support 50 and separated from each other in the transverse direction. Figure 2BAs shown, the shaft portion 52L formed at the left end of the roller support 50 is fitted into the bearing portion 33L formed in the base frame 3. Additionally, the shaft portion 52R formed at the right end of the roller support 50 is fitted into the bearing portion 33R formed in the base frame 3. Figure 4 As shown, the axis CA of the roller support 50 is located in front of and away from the transfer roller 20. Therefore, when the roller support 50 rotates about the axis CA, the transfer roller 20 attached to the roller support 50 rotates and moves about the axis CA. This movement allows the transfer roller 20 to move between a transfer position where the transfer rollers 20 (left roller 21L and right roller 21R) contact the optical disc and a retracted position located below and away from the transfer position.

[0060] A supported portion (shaft portion 52L or shaft portion 52R) is formed at one of the right and left ends of the roller bracket 50, and a support portion (bearing portion 33L or bearing portion 33R) supports the supported portion and is formed by the base frame 3. The supported portion and the support portion can be configured to allow the supported portion to move in the vertical direction. Therefore, one of the left and right ends of the roller bracket 50 can move in the vertical direction relative to the other, and one of the left ends of the left roller 21L and the right ends of the right roller 21R (the first end) can move in the vertical direction relative to the other end (the second end). In other words, depending on the state of the inserted optical disc, one of the left and right ends of the roller bracket 50 shifts in the vertical direction relative to the other, thereby allowing one of the left ends of the left roller 21L and the right ends of the right roller 21R (the first end) to move in the vertical direction relative to the other end (the second end). This allows the proper connection between the optical disc and the roller to be maintained according to the state of the optical disc.

[0061] Figure 6 This is a magnified view of the right side of base frame 3. (See attached image.) Figure 2A , Figure 2B , Figure 6 As shown, in this embodiment, the base frame 3 has a right side wall portion 32R constituting the right end of the base frame 3 (the right frame portion of the box). A bearing portion 33R is formed in the right side wall portion 32R. When the roller support 50 is biased upward by the spring 25, a gap d extending in the vertical direction is formed between the shaft portion 52R of the roller support 50 and the bearing portion 33R of the base frame 3. The gap d allows for vertical movement of the right end of the roller support 50 (shaft portion 52R) within the bearing portion 33R. Note that in Figure 6 In the middle, the bearing part 33R is formed as a cut, but the bearing part 33R can also be a long and narrow groove in the vertical direction.

[0062] In addition, such as Figure 2BAs shown, the base frame 3 includes a left side wall portion 32L constituting the left end (left frame portion of the box) of the base frame 3. Additionally, a left inner wall portion 34, which is flat and parallel to the left side wall portion 32L, is formed inside the base frame 3. A left bearing portion 33L is formed in the left inner wall portion 34, such that the shaft portion 52L of the roller support 50 is fitted into the bearing portion 33L. Inside the bearing portion 33L, the vertical movement of the left end (shaft portion 52L) of the roller support 50 is restricted.

[0063] The conveying mechanism A includes a conveying roller drive mechanism that rotates the conveying roller 20. The roller drive mechanism can be connected to the left end of the left roller 21L or the right end of the right roller 21R, where vertical movement is restricted (a second end). As described above, when the roller drive mechanism is provided at the second end where vertical movement is restricted, the roller drive mechanism can be easily connected to the conveying roller. In this embodiment, the bearing portion 33L of the base frame 3 restricts the vertical movement of the left end (shaft portion 52L) of the roller support 50, thereby restricting the vertical movement of the shaft portion 22L corresponding to the left end of the left roller 21L. Furthermore, as... Figure 4 As shown, gear 24 is attached to shaft 22L corresponding to the left end of left roller 21L, and the conveyor roller drive mechanism (gear 61e described later) is connected to gear 24. The rotation center axis of gear 24 is located on the axis CL of left roller 21L. Note that no gear connected to the conveyor roller drive mechanism is attached to shaft 22R corresponding to the right end (first end) of right roller 21R, which is allowed to move in the vertical direction.

[0064] Figure 7 This is an exploded perspective view showing the loading motor 60 and gears 61a to 61g. Figure 8 This is a left-side view of gears 61b to 61g and roller support 50. Gear 61a is a worm gear, mounted on the rotating shaft of the loading motor 60, and meshes with gear 61b. The worm gear configuration of gear 61 allows for a certain reduction ratio in the rotational speed relative to the shaft of the loading motor 60. Furthermore, as... Figure 8 As shown, gear 61b meshes with gears 61a and 61c. Gear 61c meshes with gears 61b, 61d, and 61f. Gear 61d meshes with gears 61c and 61e. Gear 61e meshes with gear 61c and gear 24, which is connected to the left roller 21L. Gear 61f meshes with gears 61c and 61g.

[0065] As part of the conveyor roller drive mechanism that rotates the conveyor roller 20, the conveyor mechanism A includes a first transmission mechanism that transmits the rotation of the loading motor 60 to the conveyor roller 20. In this embodiment, gears 61a to 61e correspond to the first transmission mechanism. That is, the rotation of the loading motor 60 is transmitted to gear 24 via the first transmission mechanism corresponding to gears 61a to 61e. Then, gear 24 rotates clockwise or counterclockwise, causing the left roller 21L, to which gear 24 is attached, and the right roller 21R, connected to the left roller 21L via the connecting portion 23R, to rotate in the same direction (clockwise or counterclockwise) as gear 24, at the same speed as gear 24. Figure 8 As shown, at least a portion of the loading motor 60 is located behind the gear 61e that constitutes the front end of the first transmission mechanism. Note that the first transmission mechanism is not limited to gears and may include belts, etc.

[0066] Furthermore, the conveying mechanism A includes a roller support 50 and a slider 70, serving as a conveying roller position control mechanism for moving the position of the conveying roller 20. Figure 2B As shown, slider 70 is mounted on the left end of the base frame 3 (left side wall 32L). Slider 70 serves as a conveyor roller operating member for moving the conveyor roller 20 to a conveying position where the conveyor roller 20 contacts the optical disc (first roller position) and to a position away from the conveying position where the conveyor roller 20 is separated from the optical disc (second roller position).

[0067] Figure 9A and 9B This is a left-side view of the slider 70, gear, and roller support 50. At the left end of the base 3, the slider 70 can move between a first sliding position (first operating member position) and a second sliding position (second operating member position), the second sliding position being in front of and away from the first sliding position. Figure 9A The diagram shows the slider 70 in the first sliding position, while Figure 9B This illustrates the case where slider 70 is positioned in a second sliding position, preceding the first sliding position. (As shown...) Figure 9A As shown, when slider 70 is in the first sliding position, conveyor roller 20 is in the conveying position. Furthermore, as... Figure 9B As shown, when the slider 70 is in the second sliding position, the conveyor roller 20 is in the retracted position below the conveying position.

[0068] like Figure 2B As shown, the front end of the slider 70 is fitted into a guide hole 35 formed in the left end (left side wall 32L) of the base 3. A forward-facing and downward-sloping guide surface 71 is formed in the front end of the slider 70, and as shown... Figure 4As shown, the guided portion 54 is formed at the left end of the roller bracket 50. The guided portion 54 protrudes to the left from the roller bracket 50. When the slider 70 moves from the first sliding position to the second sliding position, the guided portion 54 of the roller bracket 50 contacts the guide surface 71 of the slider 70 within the base 3 or the guide hole 35, and is lifted by the guide surface 71. At this time, the roller bracket 50 rotates along the axis CA to move the conveyor roller 20 located behind the axis CA to the retracted position (see...). Figure 9B ).

[0069] The front end of the roller support 50 forms a blocking portion 55 that blocks the insertion port of the optical disc drive 1. The roller support 50 is pushed by the slider 70 and rotates about the axis CA, thus being located in front of the axis CA. At this time, the blocking portion 55 is positioned above the transfer roller 20, blocking the insertion port of the optical disc drive 1. Therefore, when an optical disc is placed on the spindle motor 11, it is possible to prevent the user from attempting to insert another optical disc into the insertion port.

[0070] As a conveyor roller position control mechanism that moves the position of the conveyor roller 20, the conveyor mechanism A includes a loading motor 60 and a second transmission mechanism that transmits the rotation of the loading motor 60 to the slider 70, which is a conveyor roller operating member. Figure 9B As shown, a rack-shaped actuated portion 72 extending in the front-rear direction is formed inside the slider 70, and the actuated portion 72 meshes with the gear 61g. In this embodiment, gears 61a to 61c, 61f, and 61g correspond to the second transmission mechanism. As gear 61g rotates and gear 61 engages with the actuated portion 72, the slider 70 moves forward or backward. Figure 2B and 7 As shown, at least a portion of the loading motor 60 is located in front of the gear 61g that constitutes the rear end of the second transmission mechanism. Note that the second transmission mechanism is not limited to gears and may include belts, etc.

[0071] Furthermore, the conveying mechanism A includes a distribution mechanism that engages with each of a first transmission mechanism that transmits the rotation of the loading motor 60 to the conveying roller 20 and a second transmission mechanism that transmits the rotation of the loading motor 60 to the slider 70, which serves as an operating member of the conveying roller. The distribution mechanism distributes the rotation of the loading motor 60 to both the first and second transmission mechanisms. Therefore, it is possible to suppress the lengthening of the transmission path for the rotation of the loading motor 60. In this embodiment, as... Figure 8 As shown, the distributing mechanism includes an intermediate gear 61c, which is a different component from the gear 61a (worm gear) corresponding to the component directly attached to the loading motor 60. The gear 61c, which serves as the distributing mechanism, meshes with gear 61d, which is only included in the first transmission mechanism, and gear 61f, which is only included in the second transmission mechanism.

[0072] Furthermore, some components constituting the first transmission mechanism are arranged in a first direction relative to the distribution mechanism, while some components constituting the second transmission mechanism are arranged in a second direction opposite to the first direction relative to the distribution mechanism. For example... Figure 8 As shown, gears 61d and 61e, which are included in the components constituting the first transmission mechanism but not the second transmission mechanism, are arranged in front of gear 61c constituting the distribution mechanism. Gears 61f and 61g are arranged behind gear 61c, and are included in the components constituting the second transmission mechanism but not the first transmission mechanism. Therefore, compared to, for example, a case where components constituting only the first transmission mechanism and components constituting only the second transmission mechanism are arranged in the same direction in front of the distribution mechanism, this embodiment allows for a shorter transmission path for both the first and second transmission mechanisms. This enables the overall miniaturization of the optical disc drive 1 and reduces torque loss caused by the increased transmission path length.

[0073] like Figure 7 As shown, the optical disc drive 1 includes a retainer 62 that holds a first transmission mechanism, a second transmission mechanism, and a load motor. The load motor 60 is mounted in the retainer 62, and gears 61c to 61g are supported by the retainer 62. Figure 2B and 7 As shown, the loading motor 60 and the gears 61a to 61g constituting the first and second transmission mechanisms are held by the retainer 62 and are arranged at the inner left end of the generally box-shaped base 3. At this point, the conveyor roller 20 is positioned in front of the loading motor 60, gears 61a to 61g, and retainer 62. In other words, the conveyor roller 20 is arranged closer to the optical disc insertion port than the loading motor 60, gears 61a to 61g, and retainer 62. Therefore, near the insertion port, the optical disc is conveyed backward to facilitate insertion.

[0074] Furthermore, the first and second transmission mechanisms are located inside the base frame 3, while the slider 70, which serves as the operating member for the conveyor rollers, is located outside the base frame 3. The slider 70 is arranged on the left side of the left side wall 32L of the generally box-shaped base frame 3, and is arranged adjacent to the gears 61a to 61g across the left side wall 32L. By arranging the slider 60 outside the base frame 3 as described above, interference between the internal components of the base frame 3 and the slider 60 can be prevented when the slider 60 moves in the front-back direction.

[0075] Figure 10A , Figure 11 , Figure 12A This is a top view showing the arrangement of various components on the top frame 4. Figure 10A The scenario depicts the case where there is no disc in optical drive 1. Figure 11 This indicates that optical disc O is inserted into the slot of optical disc drive 1. Figure 12AThe image depicts the optical disc drive 1 in the drive position. In addition to the load motor 60 and gears 61a to 61e (first transmission mechanism), the transfer roller drive mechanism that rotates the transfer roller 20 also includes a switch plate 15 and a switching arm 80 disposed in the top frame 4.

[0076] like Figure 10A As shown, the switch plate 15 is positioned corresponding to the left end and rear end of the top frame 4. The switch plate 15 includes a start switch 15a and a stop switch 15b, respectively located at the right and left ends of the switch plate 15. The switch plate 15 is electrically connected to the loading motor 60 via wiring, etc. The start switch 15a and stop switch 15b are configured to control the drive cycle of the loading motor (the cycle of driving the loading motor). More specifically, the start switch 15a and stop switch 15b are configured to detect the position of the optical disc and control the rotation of the loading motor 60 based on the detected position of the optical disc. The start switch 15a is pressed to start the loading motor 60 (see...). Figure 11 The rotation of the load motor 60 is stopped when the stop switch 15b is pressed while the start switch 15a is pressed (see [link]). Figure 12A ).

[0077] like Figure 2A and 12A As shown, viewed from the direction of the rotation axis (axis CB) of the spindle motor 11, the loading motor 60 is positioned overlapping the optical disc O placed at the location of the spindle motor 11. Therefore, for example, compared to the case where the loading motor 60 is positioned behind the optical disc O placed at the location of the spindle motor 11, this embodiment allows for a shorter path of the first transmission mechanism along which the rotation of the loading motor 60 is transmitted to the conveyor roller 20. This reduces torque loss caused by the elongated transmission path for the rotation of the loading motor 60.

[0078] In addition, such as Figure 12A As shown, the switch plate 15 is equipped with a start switch 15a and a stop switch 15b for controlling the drive cycle of the loading motor. Viewed from the direction of the rotation axis (axis CB) of the spindle motor 11, the switch plate is located behind the optical disc O placed at the position of the spindle motor 11. Therefore, for example, compared to the case where the switch plate 15 is positioned overlapping the optical disc O placed at the position of the spindle motor 11, this embodiment allows for miniaturization of the optical disc drive 1 in the vertical direction.

[0079] The switching arm 80 also serves as a centering mechanism B for positioning the optical disc that has been conveyed to the spindle motor 11. In this embodiment, a switching arm 80 is provided. The switching arm 80 is positioned corresponding to the right and rear sides of the top frame 4 and has a shape that curves along the outer edge of the top frame 4. One end (front end) of the switching arm 80 extends to the optical disc insertion port, and the other end (rear end) of the switching arm 80 extends to the left and rear sides of the top frame 4. The switching arm 80 includes a tubular supported portion 81 attached to the top frame 4. The switching arm 80 is rotatable about an axis (rotation center axis) extending vertically through the center of the supported portion 81. Figure 12A As shown, the rotation center axis of the switching arm 80 is set at the first plane (including...) Figure 12A The right side of the plane of line bb) and the second plane (including Figure 12A At the position corresponding to the rear side (opposite to the contact portion 82a described below) of the plane of line b'-b', the first plane extends in the front-rear direction through the rotation center axis (axis CB) of the spindle motor 11, and the second plane extends perpendicular to the first plane through the rotation center axis (axis CB) of the spindle motor 11. When the rotation center axis of the switching arm 80 is set behind the spindle motor 11 as described above, the switching arm 80 can be provided with a certain length from the rotation center axis to the front end, allowing the front end of the switching arm 80 to have a certain range of movement in the lateral direction.

[0080] like Figure 3 As shown, spring 85 is attached to switching arm 80. Figure 10A In the top view of the top frame 4 shown, the spring 85 biases the switching arm 80 clockwise. Furthermore, the switching arm 80 includes a leaf spring portion 86 that contacts the internal structure of the top frame 4.

[0081] The front end of the switching arm 80 reaches the area in front of the conveyor roller 20 (formed in the opening 41R of the top frame 4) within the top frame 4. For example... Figure 3 As shown, the switching arm 80 includes two downwardly protruding contact portions 82a and 82b. Contact portion 82a is formed at the front end of the switching arm 80, and contact portion 82b is formed between contact portion 82a and the supported portion 81. Additionally, openings 42a and 42b, extending obliquely in the lateral direction, are formed on the right side of the top frame 4. Openings 42a and 42b are formed side-by-side in the front-rear direction, separated by opening 41R. The contact portions 82a and 82b of the switching arm 80 are formed through the openings 42a and 42b of the top frame 4 in the vertical direction. The top ends of each of the contact portions 82a and 82b reach the transport path located within the base frame 3 through which the optical disc passes.

[0082] The switching arm 80 includes a switch operating section 83 formed at its rear end to operate the start switch 15a and the stop switch 15b. Inside the top frame 4, the switch operating section 83 is adjacent to the switch plate 15 in the lateral direction. Figure 10A As shown, when there is no optical disc O in the optical disc drive 1, the switch operation section 83 neither actuates the start switch 15a nor the stop switch 15b. Figure 11 As shown, when the optical disc O is inserted into the insertion port of the optical disc drive 1, the edge of the optical disc O pushes the contact portion 82a to the right, causing the switching arm 80 to move counterclockwise relative to the rotation center axis (the center of the supported portion 81). The switch operation portion 83 then only actuates the start switch 15a. This causes the loading motor 60 to start rotating, transmitting the rotation to the transfer roller 20 via the first transmission mechanism (gears 61a to 61e). The transfer roller 20 then rotates to move the optical disc O placed on it toward the position of the spindle motor 11.

[0083] Furthermore, when the optical disc O is conveyed to the position of the spindle motor 11, the edge of the optical disc O pushes the contact portion 82b to the right. Therefore, the switching arm 80 moves further counterclockwise relative to the rotation center axis (the center of the supported portion 81), and the switch operation portion 83 actuates both the start switch 15a and the stop switch 15b. Then, the rotation of the loading motor 60 stops, and the rotation of the transfer roller 20, which rotates via the first transmission mechanism, also stops. As described above, when the optical disc O is conveyed to the position of the spindle motor 11, the rotation of the loading motor 60 stops, thus reducing the power consumption of the optical disc drive 1.

[0084] The conveyor roller position control mechanism that moves the position of the conveyor roller 20 includes, in addition to the roller support 50, loading motor 60, gears 61a to 61c, 61f and 61g (second transmission mechanism) and slider 70, a rotating arm 90 (movable member) arranged on the top frame 4. For example... Figure 3 As shown, the rotating arm 90 includes a disc-shaped base 91 located inside the top frame 4, in front of the switch plate 15, and adjacent to the switch plate 15 in the front-rear direction. The rotating arm 90 includes a tubular supported portion 92 located at the center of the base 91 and attached to the top frame 4. The rotating arm 90 rotates around the center of the supported portion 92 along a rotation axis extending in the vertical direction. A spring 96 is attached to the inner side of the rotating arm 90. (Top view of the top frame 4) Figure 10A In the rotation, spring 96 biases the rotating arm 90 clockwise relative to the rotation center axis (the center of the supported part 92).

[0085] Figure 13 This is a perspective view showing the rear side of the switching arm 80 and the rotating arm 90. (Example) Figure 13As shown, a downwardly protruding contact portion 93 is formed on the base 91 of the rotating arm 90, at a position away from the supported portion 92. Furthermore, as... Figure 3 As shown, an opening 43 extending in an arc shape in the lateral direction is formed on the left side of the top frame 4. The contact portion 93 of the rotating arm 90 penetrates the opening 43 of the top frame 4 in the vertical direction. The top end of the contact portion 93 reaches the transmission path located within the base frame 3 through which the optical disc passes. Figure 13 As shown, the contact portion 93 of the rotating arm 90 is located behind the contact portions 82a and 82b of the switching arm 80. In other words, the contact portions 82a and 82b of the switching arm 80 are located in front of the contact portion 93 of the rotating arm 90.

[0086] The rotating arm 90 moves in response to the impact of a disc approaching the spindle motor 11. Figure 11 In the top view, during the process of transferring the optical disc O inserted into the insertion port of the optical disc drive 1 to the position of the spindle motor 11, the contact portion 93 formed on the rotating arm 90 is pushed to the left by the edge of the disc, thereby causing the rotating arm 90 to rotate counterclockwise relative to the rotation center axis (the center of the supported portion 92).

[0087] In addition, such as Figure 3 As shown, the rotating arm 90 is provided with a groove 94 extending from the output edge portion of the rotating arm 90 (more specifically, the protrusion 98 described below) toward the supported portion 92. Figure 2B As shown, the slider 70 includes a cover 75 that covers a portion of the left side wall 32L of the base frame 3, and a shaft 76 extending in the vertical direction formed at the right end of the cover 75. An opening 44 extending in the front-rear direction is formed on the left side of the top frame 4, and the shaft 76 of the slider 70 passes through the interior of the opening 44. That is, the top end 76 of the shaft is disposed inside the top frame 4.

[0088] like Figure 4 As shown, the shaft portion 76 formed on the slider 70 is fitted into the groove portion 94 formed on the rotating arm 90. In this state, the counterclockwise rotation of the rotating arm 90 moves the position of the groove portion 94 forward. At this point, the edge of the groove portion 94 pushes the shaft portion 76 forward, thereby moving the slider 70 forward as well. When the slider 70 is in... Figure 9AIn the first sliding position shown, the rack-shaped operated portion 72 formed inside the slider 70 is not engaged with the gear 61g constituting the second transmission mechanism. At this point, the rotating arm 90 rotates by being pushed by the optical disc inserted into the optical disc drive 1, and the slot 94 of the rotating arm 90 pushes the shaft portion 76 of the slider 70 forward, causing the operated portion 72 inside the slider 70 to engage with the gear 61g. Subsequently, the slider 70 pushes the roller support 50 downward to place the transfer roller 20 in the retracted position. As described above, the slider 70 begins to move during the process of transferring the optical disc to the spindle motor 11, so that after the optical disc is placed on the spindle motor 11, the transfer roller 20 can move to the retracted position.

[0089] <3. Centering Mechanism>

[0090] Now, the construction of the centering mechanism B, which aligns the center position of the optical disc transported by the transport mechanism A with the center position (drive position) of the spindle motor 11, will be described. Figure 14 This is a perspective view of the base frame 2 and the top frame 4. The centering mechanism B is realized by the base frame 2 and the switching arm 80 disposed in the top frame 4.

[0091] like Figure 14 As shown, the base 2 holding the spindle motor 11 is provided with a plurality of stops 26a and 26b, which contact the outer edge of the optical disc that has reached the position of the spindle motor 11 and restrict the rearward movement of the optical disc. Each of the stops 26a and 26b is columnar, extending upward from the upper surface of the base 2, and is integrally formed with the base 2. By the fact that the stops 26a and 26b are integrally formed on the base 2 holding the spindle motor 11, as described above, positional changes of the stops 26a and 26b relative to the spindle motor 11 can be suppressed, thereby suppressing misalignment between the center position and the driving position of the optical disc. Furthermore, as Figure 2A As shown, the two stop portions 26a and 26b are arranged away from each other in the direction of optical disc rotation. Furthermore, the two stop portions 26a and 26b can be integrally formed on the base 2 to which the spindle motor 11 is attached, or they can be fixedly arranged at a predetermined position relative to the spindle motor 11. With the multiple stop portions 26a and 26b described above, the center position of the optical disc can be stably placed in the drive position. Note that the number of stop portions integrally formed on the base 2 can be one, or three or more.

[0092] Furthermore, the centering mechanism B includes a switching arm 80 serving as a biasing member. This switching arm 80 includes contacts 82a and 82b that contact the outer edge of the optical disc as it moves toward the position of the spindle motor 11. The switching arm 80 uses the contacts 82a and 82b to align the center of the optical disc with the position of the spindle motor 11. The switching arm 80 also functions as a biasing member biased by a spring 85, causing the contacts to push the optical disc toward the stops 26a and 26b. The switching arm 80 and the contacts 82a and 82b allow the center position of the optical disc to be guided to a drive position corresponding to the rotation center of the spindle motor 11. Additionally, since only one switching arm 80 is provided in this embodiment, the number of components in the optical disc drive 1 can be reduced compared to the case where multiple biasing members are provided.

[0093] like Figure 12A As shown, contact portions 82a and 82b formed on the switching arm 80 are positioned on the side opposite to the stop portions 26a and 26b, spanning the optical disc that reaches the position of the spindle motor 11. Contact portions 82a and 82b are disposed on the first plane as described above (including...). Figure 12A The contact portions 82a and 82b are located on one of the right and left sides of the plane (including the plane of line bb). In this embodiment, the contact portions 82a and 82b are only provided on the right side of the first plane. Furthermore, the contact portions 82a and 82b are provided on the second plane (including the plane of line bb). Figure 12A The front side of the plane of line b'-b' in the middle.

[0094] In addition, such as Figure 2A As shown, in the base frame 2, the stop portion 26b is provided on the aforementioned first plane (including...). Figure 2A On the other side of the plane of line bb (in this embodiment, the left side), and each of the stop portions 26a and 26b is arranged on the aforementioned second plane (including the plane of line bb). Figure 12A The rear side of the plane of line b'-b' in the middle. When the contact parts 82a and 82b and the stop parts 26a and 26b are set as described above, the optical disc transmitted to the position of the spindle motor 11 can be pushed in the front-back direction and the lateral direction, allowing the optical disc to be aligned in both directions.

[0095] As described above, during the transfer of the optical disc to the position of the spindle motor 11, the rotating arm 90 rotates in response to the collision with the optical disc. In this respect, the rotating arm 90 includes a first protrusion 97a, which engages with the switching arm 80. The first protrusion 97a protrudes upward and is located at the end of an arm portion 91a extending from a disc-shaped base 91. The groove 94, the arm portion 91a, and the second protrusion 97b, described later, formed on the rotating arm 90, are spaced apart from each other in the circumferential direction of the disc-shaped base 91.

[0096] like Figure 13As shown, a groove 84 is formed on the lower surface of the rear end of the switching arm 80. The switching arm 80, which serves as a component constituting the centering mechanism B, is connected to the rotating arm 90 via the groove 84. Specifically, the centering mechanism B includes a switching arm 80, which serves as a component connected to the rotating arm 90, which acts as a movable member. The rotating arm 90 engages with the switching arm 80 via a first protrusion 97a. When the optical disc reaches the position of the spindle motor 11, the rotating arm 90 moves the switching arm 80, causing the contact portions 82a and 82b of the switching arm 80 to move away from the optical disc. When the rotating arm 90 rotates in response to the collision with the optical disc, the first protrusion 97a of the rotating arm 90 fits into the groove 84 of the switching arm 80 to push the edge of the groove 84 forward, thereby moving the switching arm 80. Therefore, the switching arm 80 moves in the direction opposite to the bias direction of the spring 85. Figure 11 The optical disc moves counterclockwise (in the direction of rotation), and the contacts 82a and 82b formed on the switching arm 80 move away from the optical disc positioned at the location of the spindle motor 11 (in the drive position). Figure 12A As shown, with the optical disc O in the drive position, the contacts 82a and 82b are positioned away from the edge of the optical disc O. This avoids contact between the optical disc O in the drive position and the contacts 82b and 82b, allowing for smooth rotation of the optical disc O.

[0097] <4. Clamping Mechanism>

[0098] Now, the clamping mechanism C that holds the optical disc at the center position (in the drive position) of the spindle motor 11 will be described. Figure 3 As shown, the clamping mechanism C includes a clamping pulley 12. The clamping pulley 12 is a component that fixes the optical disc to the spindle motor 11, and is movable between a position where the clamping pulley 12 is above and away from the spindle motor 11 (first pulley position) and a position where the clamping pulley 12 is close to and held between the clamping pulley 12 and the spindle motor 11 (second pulley position). The clamping pulley 12 includes a magnet 13 at its inner center. Furthermore, a fixing member 14 configured to fix the magnet 13 is attached to the inner side of the clamping pulley 12. The clamping pulley 12 is attracted to the inner side of the clamping pulley 12 by the magnetic force of the magnet 13.

[0099] Figure 10B and Figure 12B This is a diagram showing the operation of the clamping mechanism C. Figure 10B It is along Figure 10A The sectional view taken by the line bb. Figure 12B It is along Figure 12A The sectional view taken by the line bb. Figure 10A and 10B The clamping pulley 12 shown is placed at the first pulley position. Figure 12A and Figure 12BThe clamping pulley 12 is positioned at the second pulley position, below and in front of the first pulley position. When the clamping pulley 12 is in the second pulley position, a magnetic force is applied between the clamping pulley 12 and the spindle motor 11 to hold the optical disc between them. Therefore, the optical disc rotates integrally with the spindle motor 11.

[0100] The clamping mechanism C includes a pulley position control mechanism configured to manipulate the position of the clamping pulley 12. For example... Figure 3 , Figure 10A and Figure 12A As shown, the pulley position control mechanism includes a first limiting arm 110 (control arm) that engages with and moves the position of the clamping pulley 12. Furthermore, the first limiting arm 110 and a rotating arm 90 constituting the pulley position control mechanism are mounted on a common support plate (top frame 4). The rotating arm 90 is a movable member that rotates and moves the first limiting arm 110 in response to a collision with the optical disc. Within the top frame 4, the first limiting arm 110 is located on the left side of the top frame 4 and in front of the rotating arm 90. Specifically, the first limiting arm 110 constituting the pulley position control mechanism and the rotating arm 90, which serves as a movable member, are positioned across the aforementioned first plane (…). Figure 10A and Figure 12A The line bb) is on the side opposite to the switching arm 80 (left side in this embodiment). As described above, by setting the pulley position operating mechanism on the side opposite to the switching arm 80 inside the top frame 4, the internal space of the top frame 4 can be effectively utilized.

[0101] Furthermore, the second limiting arm 120 is positioned at the center of the top frame 4. The second limiting arm 120, together with the first limiting arm 110, supports the outer periphery of the clamping pulley 12. Figure 3 As shown, an opening 45 is formed at the center of the top frame 4. A second limiting arm 120 is disposed inside the opening 45. The second limiting arm 120 includes shaft portions 121L and 121R disposed at the rear end of the second limiting arm and disposed in the transverse direction. The second limiting arm 120 is rotatable in the vertical direction about an axis CE extending in the transverse direction through the center of the shaft portions 121L and 121R. The second limiting arm is biased upward by a spring (not shown).

[0102] The first limiting arm 110 includes a sector-shaped base 111 and a supported portion 112 located at the center of the sector-shaped base 111. The first limiting arm 110 is rotatable about axis CC (see...). Figure 10B and 12B The axis CC serves as a rotational center axis extending vertically through the center of the supported portion 112. Furthermore, a spring 116 is attached to a first limiting arm 110. The first limiting arm 110 is biased counterclockwise about the axis CC by the elastic force of the spring 116.

[0103] Furthermore, the clamping pulley 12 includes two flanges 12a and 12b disposed on the outer periphery of the clamping pulley 12 and projecting radially. The two flanges 12a and 12b are spaced apart from each other in the vertical direction. The first and second limiting arms 110 and 120 respectively include support portions 113 and 122 for supporting the clamping pulley 12. Figure 10A As shown, a support portion 113 is formed at the end of an arm portion 111a extending outward from the fan-shaped base 111 of the first limiting arm 110, and the support portion 113 extends rearward from the end. A support portion 122 is formed on the second limiting arm 120 and is located in the lateral direction between shaft portions 121L and 121R and in front of the axis CE. When the clamping pulley 12 is positioned in the first pulley position, the support portions 113 and 122 are positioned between two flange portions 12a and 12b arranged in the vertical direction, as shown. Figure 10B As shown. Supports 113 and 122 are thus captured at flange 12a. Support 113 of the first limiting arm 110 is engaged at the front end of flange 12a, while support 122 of the second limiting arm 120 is engaged at the rear end of flange 12a. Therefore, supports 113 and 122 support and hold pulley 12 against gravity and the magnetic force of magnet 13.

[0104] The rear end of the support portion 122 of the second limiting arm 120 is provided with a guide wall 122b protruding upward from the upper surface 122a of the support portion 122 and an inclined surface 122c extending forward and downward from the upper surface 122a. For example... Figure 10B As shown, when the clamping pulley 12 is in the first pulley position, the clamping pulley 12 is pushed backward by the support portion 113 of the first limiting arm 100, and the rear end edge of the flange portion 12a contacts the guide wall 122b. This prevents the clamping pulley 12 from moving backward toward the support portion 122 and prevents the clamping pulley 12 from disengaging from the support portions 113 and 122.

[0105] like Figure 10A As shown, the second limiting arm 120 includes a left arm portion 123L extending forward from the left side of the support portion 122 and a right arm portion 123R extending forward from the right side of the support portion 122. The left and right arm portions 123L and 123R are spaced apart from each other in the lateral direction. A cutout portion 124 is formed between the left and right arm portions 123L and 123R and opens downward. The support portion 122, located behind the cutout portion 124, protrudes upward relative to the left and right arm portions 123L and 123R. A clamping pulley 12 is fitted between the left and right arm portions 123L and 123R (within the cutout portion 124). The diameters of the flange portions 12a and 12b formed on the clamping pulley 12 are larger than those of the cutout portion 124 (see reference). Figure 3In the lateral direction, the flanges 12a and 12b overlap the left and right arms 123L and 123R in the vertical direction. This allows the clamping pulley 12 to be prevented from falling out of the cutout 124 formed in the second limiting arm 120.

[0106] In addition, such as Figure 10A As shown, the first limiting arm 110 includes a protrusion 114 projecting outward from the fan-shaped base 111. The protrusion 114 overlaps the pressure-receiving portion 126 located at the front end of the left arm portion 123L of the second limiting arm 120, thereby pushing the pressure-receiving portion 126 downward. As described above, the protrusion 114 pushes the front end of the second limiting arm 120 (pressure-receiving portion 126) downward, thereby limiting the upward tilting of the second limiting arm 120 due to the elastic force of the spring. Figure 10B As shown, with the clamping pulley 12 in the position of the first pulley, the second limiting arm 120 is positioned along a horizontal plane (a plane perpendicular to the axis CB of the main spindle motor 11) via the protrusion 114. In this case, as... Figure 10B As shown, the support portion 122 of the second limiting arm 120 is positioned at the position where the support portion 122 supports the flange portion 12a of the clamping pulley 12 (hereinafter referred to as the support position), and the upper surface 122a of the support portion 122 is positioned along the horizontal surface.

[0107] Furthermore, the first limiting arm 110 protrudes outward from the fan-shaped base 111 and includes a recess 115 with its center cut off. The arm portions 111a, provided with the support portion 113, the protrusion 114, and the recess 115, are separated from each other in the rotational direction of the first limiting arm 110. Figure 12A As shown, a first limiting arm 110, serving as a component of the clamping pulley operating mechanism, is connected to the rotating arm 90 via a recess 115. In other words, the clamping pulley operating mechanism includes a first limiting arm 110 serving as a component connected to the rotating arm 90, which acts as a movable member. More specifically, the recess 115 formed in the first limiting arm 110 corresponds to the shape of the second protrusion 97b formed on the rotating arm 90, and the first limiting arm 110 is directly connected to the second protrusion 97b of the rotating arm 90 via the recess 115 and interlocked with the rotating arm 90. When the slider 70 moves to the second sliding position to rotate the rotating arm 90 counterclockwise relative to the rotation center axis (the center of the supported portion 92), the recess 115 of the first limiting arm 110 engages with the second protrusion 97b of the rotating arm 90. The first limiting arm 110 also rotates clockwise about the axis CC in a manner pulled by the second protrusion 97b. Therefore, the support portion 113 formed on the arm portion 111a of the first limiting arm 110 moves forward and is removed from the flange portion 12a of the clamping pulley 12.

[0108] like Figure 13As shown, the rotating arm 90 has a protrusion 98 that projects outward from the outer edge of the base 91. Furthermore, as... Figure 10A As shown, a protrusion 125 protruding to the left is formed on the left side surface of the left arm portion 123L of the second limiting arm 120. (As indicated...) Figure 12A As shown, when the rotating arm 90 rotates counterclockwise, the protrusion 98 of the rotating arm 90 overlaps the protrusion 125 of the second limiting arm 120 to push the protrusion 125 downward. Therefore, the second limiting arm 120, located on the horizontal plane, is further pushed downward and tilted downward relative to the horizontal plane. In this case, the support portion 122 of the second limiting arm 120 is placed... Figure 12B As shown in the position (hereinafter referred to as the release position), the upper surface 122a of the support 122 is located in a position inclined relative to the horizontal plane.

[0109] like Figure 12B As shown, when the support portion 122 is in the released position, the upper surface 122a of the support portion 122 is inclined relative to the horizontal plane, and the support portion 113 of the first limiting arm 110 is away from the flange portion 12a of the clamping pulley 12. Therefore, when the support portion 122 moves to the released position, the flange portion 12a moves from the upper surface 122a of the support portion 122 to a position closer to the spindle motor 11 so as to slide on the inclined surface 122c located in front of the flange portion 12a. The flange portion 12a is thus positioned as the second pulley position for holding the optical disc between the flange portion 12a and the spindle motor 11. At this time, before the clamping pulley 12 is attracted to the spindle motor 11 by the magnetic force of the magnet 13, the flange portion 12a contacts the left and right arm portions 123L and 123R of the second limiting arm 120. This reduces the impact generated when the clamping pulley 12 is attracted to the spindle motor 11, thereby preventing the clamping pulley 12 from moving out of the second pulley position due to the impact.

[0110] In addition, the rotating arm 90 is Figure 12A In the indicated state, clockwise rotation releases the engagement between the second protrusion 97b of the rotating arm 90 and the recess 115 of the first limiting arm 110, causing the first limiting arm 110 to rotate counterclockwise under the force of the spring 116. Then, the support portion 113 of the first limiting arm 110 pushes the clamping pulley 12, positioned at the second pulley position, backward. The flange portion 12a of the clamping pulley 12 moves on the inclined surface 122c formed on the second limiting arm 12 and rests on the support portion 122. Thus, the clamping pulley 12 is pushed upward from the second pulley position to the first pulley position, located behind and above the second pulley position, allowing the optical disc to be conveyed (discharged) from the drive position to the outside of the insertion port. As described above, the support portion 122 of the second limiting arm 120 can... Figure 10B The support positions shown are Figure 12B Move between the indicated release positions.

[0111] <5. Holistic Movement>

[0112] This will describe the movement of the mechanism that occurs when an optical disc is inserted into the slot of optical disc drive 1. For example... Figure 11 As shown in the top view of the top frame 4, the contact portion 82a of the switching arm 80 is pushed to the right by the edge of the optical disc, causing the switching arm 80 to rotate counterclockwise relative to the rotation center axis (the center of the supported portion 81). The switch operation portion 83 formed at the rear end of the switching arm 80 actuates the start switch 15a of the switch plate 15. This initiates the rotation of the loading motor 60 via the first transmission mechanism (gears 61a to 61e) and gear 24 (see... Figure 2B The rotating conveyor roller 20. In this case, in addition to the gears 61a to 61e constituting the first transmission mechanism, the gears 61f and 61g constituting the second transmission mechanism also rotate. In the conveying position, the conveyor roller 20 contacts the lower edge of the optical disc, so that when the conveyor roller 20 constituting the conveying mechanism A rotates, the optical disc is conveyed toward the spindle motor 11.

[0113] During the transfer of the optical disc, the edge of the disc contacts the contact portion 93 protruding downward from the rotating arm 90 (see...). Figure 13 ) contact, and in the top view of top frame 4 ( Figure 11 In this process, the rotating arm 90 rotates counterclockwise. As a result, the pressure portion 73 of the slider 70, which engages with the groove 94 of the rotating arm 90, is pushed forward, and the rack-shaped actuated portion 72 (see reference 72) formed inside the slider 70 is activated. Figure 9A It meshes with gear 61g, which constitutes the second transmission mechanism. Figure 9A In the process, by rotating the load motor 60, the gear 61g rotates clockwise, and is therefore engaged by the operating unit 72, thereby conveying the slider 70 to the second sliding position located in front of the first sliding position (see...). Figure 9B Then, the guide surface 71 formed at the front end of the slider 70 and the guided portion 54 formed at the left end of the roller support 50 (see...) Figure 4 The roller 20 is brought into contact with the optical disc and pushed downwards. Thus, the conveyor roller 20 is positioned in a retracted position below and away from the optical disc transport path.

[0114] The switching arm 80 is biased by the elastic force of the spring 85 of the switching arm 80, and the contact portions 82a and 82b formed on the switching arm 80 push the transported optical disc to the position of the spindle motor 11, guiding the center position of the optical disc to the position of the rotation axis (axis CB) of the spindle motor 11 (drive position). In addition, the switch operation portion 83 formed at the rear end of the switching arm 80 pushes the stop switch 15b of the switch plate 15, thereby stopping the rotation of the load motor 60 (see...). Figure 12A ).

[0115] Simultaneously, during the process of transmitting the slider 70 to the second sliding position via the loading motor 60 and the second transmission mechanism (gears 61a to 61c and gears 61f and 61g), the rotating arm 90, which engages with the slider 70 via the slot 94, rotates further clockwise in the top view of the top frame 4. However, as Figure 12A As shown, the second protrusion 97b of the rotating arm 90 engages with the recess 115 of the first limiting arm 110, causing the first limiting arm 110 to rotate clockwise. Therefore, the support portion 113 of the first limiting arm 110 disengages from the flange portion 12a of the limiting pulley 12. Furthermore, the protrusion 98 of the rotating arm 90 pushes downwards the protrusion 125 of the second limiting arm 120, and the support portion 122 of the second limiting arm 120 tilts downwards. Thus, the limiting pulley 12, supported at the first pulley position, is positioned at the second pulley position, and magnetic force is applied between the magnet 13 and the spindle motor 11 to hold the optical disc between the limiting pulley 12 and the spindle motor 11. This allows the optical disc to rotate integrally with the spindle motor 11.

[0116] Furthermore, when the optical disc reaches the position of the spindle motor 11, the first protrusion 97a formed on the rotating arm 90 pushes the groove 84 formed in the switching arm 80 (see...). Figure 13 The edges of the switching arm 80 are separated from the optical disc by contact portions 82a and 82b. This allows for smooth rotation of the optical disc.

[0117] <6. Vibration Suppression Mechanism>

[0118] Finally, the vibration suppression mechanism D will be described. Figure 15 This is an exploded perspective view of the base frame 2. Figure 16A This is a bottom view of the bottom shell 5, which forms the outer casing. (Example) Figure 15 and 16A As shown, the vibration suppression mechanism D is implemented by a plurality of (three in this embodiment) first dampers 130 and a plurality of (four in this embodiment) second dampers 140. The first and second dampers 130 and 140 comprise elastomers such as rubber.

[0119] like Figure 15 As shown, the first damper 130 has a dual structure, including a cylindrical outer tube portion 131 and a cylindrical inner tube portion 132 with a diameter smaller than that of the outer tube portion 131. The inner tube portion 132 is arranged at the center position 2 inside the outer tube portion 131. A plurality of spoke portions (six in this embodiment) are formed between the outer tube portion 131 and the inner tube portion 132. The spoke portions are arranged at regular intervals along the diameter of the outer edge portion 131 to connect the outer tube portion 131 and the inner tube portion 132. The spoke portions are elastically bent between the outer tube portion 131 and the inner tube portion 132 to absorb vibration, thereby suppressing the transmission of vibration between the member attached to the outer tube portion 131 and the member attached to the inner tube portion 132.

[0120] As described above, the base frame 2 includes a spindle motor 11 and optical elements corresponding to the optical pickup. The base frame 2 is housed within an inner shell comprising a base frame 3 and a top frame 4. The base frame 3 is box-shaped with an upward opening and supports the conveyor roller 20, which serves as the conveying mechanism A. The base frame 2 is disposed within the base frame 3. In this respect, the base frame 2 is fixed to the inner shell (base frame 3 and top frame 4) by a first damper 130. In this embodiment, the base frame 2 is fixed to the base frame 3 by the first damper 130.

[0121] Furthermore, the inner shell (base frame 3 and top frame 4) is fixed within the outer shell (bottom shell 5 and cover 6) that houses the inner shell via a second damper 140. As described above, the bottom shell 5 has a similar shape to the base frame 3, being an upwardly opening box shape, and the inner shell (base frame 3 and top frame 4) is fixed to the bottom shell 5. In this embodiment, the base frame 3 is fixed to the bottom shell 5 via the second damper 140.

[0122] In many cases, the center of gravity of the optical disc deviates slightly from its central position. Therefore, when the spindle motor 11 rotates the optical disc, the base 2, including the spindle motor 11, vibrates. In this regard, the first damper 130 and the second damper 140 are respectively provided in the inner shell and the outer shell, thereby suppressing the transmission of vibration of the base 2 to the outer shell and effectively preventing vibration from being transmitted to other components located on the outside.

[0123] like Figure 15 As shown, a plurality of first dampers 130 are fitted into a plurality of first damper attachment portions 27 formed on the outer periphery of the base frame 2 and having a shape corresponding to the shape of the outer periphery of the first damper 130. In this respect, the first damper attachment portion 27 is an arcuate cutout formed in the base frame 2 and has a size sufficient to surround half or more of the outer periphery of the first damper 130. As described above, the first damper 130 is attached to the cutout on the outer periphery of the base frame 2, thus eliminating the need to provide arrangement space for the first damper 130 within the base frame 2. This allows for avoiding an increase in the size of the base frame 2.

[0124] Figure 2C It is along Figure 2A The sectional view is taken by the line cc in the diagram. For example... Figure 2C As shown, the first damper 130 includes a groove 131a disposed in the outer surface of the outer tube portion 131 in the circumferential direction, and the first damper attachment portion 27 of the base frame 2 is fitted into the groove 131a. The groove 131a is disposed in the portion that contacts the first damper attachment portion 27, that is, more than half of the outer periphery of the first damper 130. In addition, the base frame 3 includes a first protrusion 36 protruding upward from the base frame 3 (see...). Figure 1The first protrusion 36 is secured to the first damper 130 by being inserted into the inner tube portion 132 of the first damper 130. The first protrusion 36 is tubular, with an opening at its upper end, and includes a rivet 135 inserted into the opening. This allows the first damper 130 to be prevented from detaching from the first protrusion 36 of the base frame 3. Furthermore, since the first protrusion 36 includes an opening at its upper end, the rivet 135 can be inserted from above the base frame 3.

[0125] As described above, the first damper 130 is attached to the base frame 2 in the lateral and / or longitudinal (planar) direction, and to the base frame 3 in the vertical (vertical) direction. The first damper 130 is attached in a way that allows elastic deformation relative to the base frame 2 in the planar direction, and in a way that allows elastic deformation relative to the base frame 3 in the vertical direction. This allows the transmission of vibrations from the base frame 2 to the base frame 3, which constitutes the inner shell, to be suppressed.

[0126] like Figure 1 As shown, the bottom shell 5 includes a plurality of second damper attachment portions 56, to which a plurality of second dampers 140 are attached. In this embodiment, the second damper attachment portions 56 are formed as circular holes disposed within a circular recess that is recessed upward toward the base frame 3. As described above, by forming the second damper attachment portions 56 within the recess of the bottom shell 5, the downward protrusion of the second dampers 140 from the bottom shell 5 can be restricted.

[0127] Figure 16B It is along Figure 16A The cross-sectional view taken by line bb in the diagram. For example... Figure 16B As shown, the second damper 140 includes a groove 141a provided circumferentially on the outer surface of the outer tube portion 141, and the edge of the hole corresponding to the second damper attachment portion 56 of the bottom shell 5 is fitted into the groove 141a. Furthermore, the diameter of the portion of the outer tube portion 141 located below the groove 141a is smaller than the diameter of the portion of the outer tube portion 141 located above the groove 141a, and the outer edge of the lower end of the outer tube portion 141 slopes upward. The shape of the outer tube portion 141 allows the second damper 140 to be pushed into the hole corresponding to the second damper attachment portion 56 of the bottom shell 5 from above.

[0128] In addition, such as Figure 16BAs shown, the base frame 3 includes a second protrusion 37 projecting downward from the base frame 3. The second protrusion 37 is secured to the second damper 140 by being inserted into the interior of the inner tube portion 142 of the second damper 140. The second protrusion 37 is tubular, with an opening at the lower end of the tube, and includes a rivet 145 inserted into the opening. This allows the second damper 140 to be prevented from detaching from the second protrusion 37 of the base frame 3. Furthermore, since the second protrusion 37 includes an opening at its lower end, the rivet 145 can be inserted from below the base frame 3 and the bottom shell 5.

[0129] As described above, the second damper 140 is attached to the base shell 5 in the lateral and / or longitudinal (planar) direction, while the second damper 140 is attached to the base frame 3 in the vertical (vertical) direction. The second damper 140 is attached in a way that allows elastic deformation relative to the base shell 5 in the planar direction, and the second damper 140 is attached in a way that allows elastic deformation relative to the base frame 3 in the vertical direction. This allows for the suppression of vibration transmission from the inner shell, including the base frame 3, to the base shell 5, which constitutes the outer shell. As described above, the first damper 130 and the second damper 140 are respectively disposed on the inner and outer sides of the base frame 3, thereby effectively preventing vibration of the base frame 2 from being transmitted to the base shell 5.

[0130] <7. Effects>

[0131] As described above, the optical disc drive 1 includes a gear 61c serving as a distribution mechanism, which meshes with each of gears 61a to 61e and each of gears 61a to 61c, 61f, and 61g. Gears 61a to 61e serve as a first transmission mechanism for transmitting the rotation of the loading motor 60 to the transfer roller 20. Gears 61a to 61c, 61f, and 61g serve as a second transmission mechanism for transmitting the rotation of the loading motor 60 to the slider 70, which serves as the transfer roller operating member. The distribution mechanism distributes the rotation of the loading motor 60 to the first transmission mechanism and the second transmission mechanism. As described above, this embodiment is provided with a distribution mechanism that distributes the rotation of the loading motor 60 to the two mechanisms, which can suppress the increase in the length of the transmission path of the rotation of the loading motor 60, thereby reducing torque loss during the transmission of rotation, for example, compared to the case where independent paths are provided for the first transmission mechanism that transmits the rotation of the loading motor 60 to the transfer roller 20 and the second transmission mechanism that transmits the rotation of the loading motor 60 to the transfer roller operating member (slider 70).

[0132] Furthermore, the transfer roller 20 includes a left roller 21L and a right roller 21R. A first end corresponding to one of the left end of the left roller 21L and the right end of the right roller 21R can move vertically relative to a second end corresponding to the other end, while the relative position between the axes CL and CR remains unchanged. Therefore, even if the position of the optical disc inserted into the insertion port of the optical disc drive 1 is not aligned in the lateral direction, the vertical movement of the left end of the left roller 21L or the right end of the right roller 21R allows the optical disc to maintain contact with the left and right rollers 21L and 21R. In addition, compared with transfer rollers where, for example, the left roller 21L and the right roller 21R move independently, the transfer roller 20 has a simpler structure, which can reduce the number of components in the optical disc drive 1.

[0133] Furthermore, the switching arm 80, which serves as a biasing member constituting the centering mechanism B, uses contact portions 82a and 82b formed on the switching arm 80 to push the optical disc, which has reached the position of the spindle motor 11, toward the stop portions 26a and 26b. Therefore, the center position of the optical disc can be aligned with the position (drive position) of the rotation center axis of the spindle motor 11. Moreover, one switching arm 80 including contact portions 82a and 82b is sufficient. Therefore, compared to, for example, using multiple biasing members to drive the optical disc, this embodiment can reduce the number of components in the optical disc drive 1.

[0134] Furthermore, the rotating arm 90 is a movable member that moves in response to a collision with an optical disc approaching the spindle motor 11, and constitutes a transfer roller position control mechanism that moves the position of the transfer roller 20 via the slider 70 and the roller support 50. Then, at least one of the centering mechanism B and the clamping pulley operating mechanism includes a member connected to the rotating arm 90, which serves as the movable member. In this embodiment, the centering mechanism B and the clamping pulley operating mechanism each include a switching arm 80 and a first limiting arm 110 as members connected to the rotating arm 90. As described above, the rotating arm 90 is shared by the transfer roller position control mechanism, the centering mechanism B, and the clamping pulley operating mechanism. This structure reduces the number of components in the optical disc drive 1 compared to a case where the rotating arm 90 is not shared.

[0135] Furthermore, the base frame 2 is fixed to the inner shell, which includes the base frame 3 and the top frame 4, by a first damper 130. The inner shell is fixed to the outer shell, which includes the bottom shell 5 and the cover 6. The outer shell accommodates the inner shell by a second damper 140. This allows the vibration of the base frame 2 to be limited to the outer shell, effectively preventing vibration from being transmitted to other components located on the outside. Moreover, compared to the case where a damper is formed only in one of the inner and outer shells, this embodiment eliminates the need to increase the size of the first or second damper 130 or 140, allowing for the avoidance of increasing the size of the optical disc drive 1. Furthermore, compared to the case where the second damper 140 is not provided in the outer shell, this embodiment enables the miniaturization of the first damper 130, thereby reducing misalignment between the base frame 2 and the transmission mechanism A supported by the base frame 3 when the optical disc drive 1 is placed vertically (when the optical disc drive 1 is placed such that one of its left and right surfaces is above the other).

[0136] <8. Variation Example>

[0137] This invention is not limited to the optical disc drive 1 described above, and various modifications can be made to the invention. For example, one aspect of the invention may include a laterally symmetrical structure relative to the structure of the optical disc drive 1 described above. In other words, the lateral positional relationship can be reversed. In this case, "left," "right," "clockwise," and "counterclockwise" in the description can be replaced with "right," "left," "counterclockwise," and "clockwise," respectively. For example, the loading motor 60, gears 24 and 61a to 61g, gear retainer 62, and slider 70, which are disposed inside the base frame 3, can be disposed on the right side of the plane extending in the front-back direction through the rotation center axis (axis CB) of the spindle motor 11. In addition, the vertical movement can be restricted by the right shaft portion 52R of the roller bracket 50, and vertical movement can be allowed by the left shaft portion 52L of the roller bracket 50. Furthermore, inside the top frame 4, the switch plate 15 and the first limit arm can be disposed on the right side, while the switching arm 80 can be disposed on the left side. The contact portions 82a and 82b formed on the switching arm 80 can be arranged exclusively on the left side of the plane extending in the front-rear direction through the rotation center axis (axis CB) of the main spindle motor 11.

[0138] Furthermore, at least one of the centering mechanism B and the clamping pulley operating mechanism may include a component (a movable component constituting the transfer roller position control mechanism) connected to the rotating arm 90. Compared to a configuration where the centering mechanism B and the clamping pulley operating mechanism do not share the rotating arm 90, this configuration also reduces the number of components in the optical disc drive 1.

Claims

1. An optical disc drive, comprising: The insertion port is configured to receive optical discs. The spindle motor is located behind the insertion port, away from it; The mechanism includes a conveyor roller that rotates about an axis, the mechanism being configured to use the conveyor roller to transport an optical disc inserted through an insertion port to a position of the spindle motor; The frame includes a stop that is configured to contact the outer edge of the optical disc, which has reached the position of the spindle motor, to limit the backward movement of the optical disc. and A biasing member includes a contact portion located on the side of the optical disc opposite the stop portion, spanning the position where the spindle motor has been reached. The biasing member is configured to use the contact portion to push the optical disc toward the stop portion. The biasing member is rotatable about an axis aligned in a direction intersecting the axis of the conveyor roller. The movable component is configured to move in response to a collision with the optical disc during the process of conveying the optical disc to the position of the spindle motor, wherein... The movable member engages with the biasing member, and when the optical disc reaches the position of the spindle motor, the biasing member moves the contact part away from the optical disc.

2. The optical disc drive according to claim 1, wherein, The frame holds the spindle motor.

3. The optical disc drive according to claim 1, wherein, The stop is integrally formed on the frame.

4. The optical disc drive according to claim 1, wherein, The contact portion extends in the front-to-back direction and is only located on the right or left side of the first plane that extends through the rotation center axis of the spindle motor.

5. The optical disc drive according to claim 1, wherein, The number of biasing components is one.

6. The optical disc drive according to claim 1, further comprising: The clamping pulley is configured to secure the optical disc to the spindle motor; and The pulley clamping mechanism is configured to operate the position of the pulley clamping mechanism, wherein... The first plane of the clamping pulley operating mechanism, which extends in the front-to-back direction and passes through the rotation center axis of the main spindle motor, is located on the side opposite to the biasing member.

7. The optical disc drive according to claim 1, wherein, The contact portion is located on the right and left of one of the first planes extending in the front-back direction and passing through the rotation center axis of the spindle motor, and is located in front of a second plane extending orthogonally to the first plane and passing through the rotation center axis of the spindle motor.

8. The optical disc drive according to claim 7, wherein, The biasing member is configured to rotate about a rotation center axis, which is located on the side of the second plane opposite to the contact portion and on the side of the first plane.

9. The optical disc drive according to claim 1, wherein, The mechanism configured to transport optical discs includes a transport roller configured to contact and transport the optical disc, a loading motor configured to rotate the transport roller, and a switch configured to detect the position of the optical disc. The biasing component includes a switch operating portion configured as an operating switch.

10. The optical disc drive according to claim 1, wherein, The frame includes a plurality of stop members that serve as stop parts, and the plurality of stop members are separated from each other in the rotation direction of the optical disc.

11. An electronic device, comprising: A housing configured to accommodate an optical disc drive, the optical disc drive comprising: The insertion port is configured to receive optical discs. The spindle motor is located behind the insertion port, away from it; The mechanism includes a conveyor roller that rotates about an axis, the mechanism being configured to use the conveyor roller to transport an optical disc inserted through an insertion port to a position of the spindle motor; The frame includes a stop configured to contact the outer edge of the optical disc, which has reached the position of the spindle motor, to limit backward movement of the optical disc; and A biasing member includes a contact portion located on the side of the optical disc opposite the stop portion, spanning the position where the spindle motor has been reached. The biasing member is configured to use the contact portion to push the optical disc toward the stop portion. The biasing member is rotatable about an axis aligned in a direction intersecting the axis of the conveyor roller. The movable component is configured to move in response to a collision with the optical disc during the process of conveying the optical disc to the position of the spindle motor, wherein... The movable member engages with the biasing member, and when the optical disc reaches the position of the spindle motor, the biasing member moves the contact part away from the optical disc.

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