KR20120079444A - Disk drive apparatus - Google Patents

Abstract

PURPOSE: A disk drive device is provided to prevent a disk jam while slimming the disk drive device. CONSTITUTION: A spindle motor assembly is mounted in a traverse assembly(50). The traverse assembly is vertically elevated. A transfer roller(60) moves between a contact location and a non contact location with a disk. The transfer roller transfers the disk by a frictional force. A roller driving unit(100) moves the transfer roller from the non contact location to the contact location when the disk is unloaded.

Description

Disk Drive Apparatus}

The present invention relates to a disk drive device, and more particularly, to an optical disk drive device of a slot-in type.

Generally, a disc drive device is a device for recording information on a disc such as a CD, a DVD, a BD, or playing back recorded information.

The disc may be supported in a tray or inserted into the disc drive device through a slot. The manner of using slots is commonly referred to as slot-in type.

The disc inserted into the disc drive device is rotated with the turntable while seated on the turntable. Accordingly, as a means for seating the disk on the turntable, a magnet clamp using magnetic force or a spring clamp using elastic force of a spring is commonly used. These magnet clamps and spring clamps are commonly arranged on top of the turntables within the disc drive device. Therefore, when these clamps are mounted on the disk drive device, the thickness of the disk drive device can only be increased as a whole.

Recently, a self-chucking method has been used in which a disk is automatically chucked to the turntable by elevating the turntable without a clamp device such as a magnet clamp or a spring clamp. Disc drive devices using a self-chucking method can have a slimmer thickness than those using a clamp device.

However, when the self-chucking method is applied to the slot-in type disk drive device, a problem may occur that the disk is caught on the turntable during unloading.

Accordingly, an object of the present invention is to provide a slot-in type disk drive apparatus capable of applying a self-chucking to satisfy a slimmer and prevent a disk jam problem.

To achieve the above object, the present invention provides a frame having a slot for inserting a disk; A spindle motor assembly comprising a turntable having a disc seat and a chucking member, and a spindle motor for rotationally driving the turntable; A traverse assembly mounted with the spindle motor assembly and capable of lifting up and down; A conveying roller which is movable between a contact position with said disk and a non-contact position with said disk, and conveys said disk by a frictional force; And a roller driving unit for moving the feed roller from the non-contact position to the contact position after the disc unloading is completed.

The roller driving unit may move the feed roller from the contact position to the non-contact position after the chucking of the disk is completed when loading the disk.

The roller driving unit includes a roller support member pivotally mounted to the frame and supporting the feed roller; An upper rotating member rotating in a clockwise or counterclockwise direction and rotating the roller support member; A lower rotating member disposed below the upper rotating member and driving to rotate the upper rotating member; And a sliding member which reciprocates in a straight line and drives the lower rotation member to rotate.

The upper rotating member, the rotating body; And a pressing jaw protruding from the rotating body to drive the roller support member to rotate.

The pressing jaw, the horizontal plane is arranged horizontally; And an inclined surface connected to the horizontal surface and inclined with respect to the horizontal surface.

A buffer groove concave inward may be formed in the rotating body of the upper rotating member.

The lower rotating member, the rotating body; And a pressing protrusion protruding from the rotating body and configured to rotate the upper rotating member.

The pressing protrusion of the lower rotating member may be disposed in the buffer groove of the upper rotating member.

The width of the buffer groove is larger than the width of the pressing protrusion.

A circular gear may be formed on the rotating body of the lower rotating member.

The sliding member, the sliding body capable of reciprocating in a straight line; An elevation guide plate provided at one side of the sliding body to guide the elevation of the traverse assembly; And a spur gear provided at the other side of the sliding body and configured to rotate the lower rotating member.

One end of the traverse assembly is provided with a lifting projection, the lifting guide plate may be formed with a lifting guide groove for guiding the movement of the lifting projection.

The roller support member may include a pivotable pivot body; A pair of roller support parts provided at both ends of the pivot body; And a rotating piece provided at one side of the pivot body and pressed by the upper rotating member.

Each of the roller support portions may include a roller accommodation groove in which one end of the transfer roller is accommodated; And a shaft insertion hole into which the rotation shaft provided in the frame is inserted.

The frame includes a base frame that accommodates a plurality of components of the disk drive device and a cover frame covering the base frame, wherein an inner surface of the cover frame includes a central portion of the disk when the disk is chucked to the chucking member. A downward pressurizing member for pressing downward is provided, and the base frame may be provided with an upper pressurizing member for pressing upward the central portion of the disk when the disk is unchucked from the chucking member.

The downward pressure member may have a ring shape, and the upward pressure member may have a rod shape.

The traverse assembly is a disc play position between the first position and the second position after the disc is raised from a first position, which is the lowest height, to a second position, which is the highest height that the disc is chucked to the chucking member. Can descend to 3 positions.

The traverse assembly may ascend from the third position to the second position and then descend to the first position upon disc unloading.

During disc loading the chucking of the disc may be completed when the traverse assembly is in a fourth position between the second position and the third position.

Unloading of the disc may be completed when the traverse assembly is in a fifth position between the second position and the first position upon disc unloading.

The roller driving unit includes a roller support member pivotally mounted to the frame and supporting the feed roller; A cam member that rotates in a clockwise or counterclockwise direction and pivotally drives the roller support member; And a sliding member reciprocating in a straight line and rotating the cam member.

Here, the cam member, the rotating body; A pressing jaw protruding upward from the rotating body and configured to pivot the roller support member; And a cam protrusion protruding horizontally from the rotating body and receiving rotational force from the sliding member.

The pressing jaw, the horizontal plane is arranged horizontally; And an inclined surface connected to the horizontal surface and formed to be inclined with respect to the horizontal surface.

The sliding member, the sliding body capable of reciprocating in a straight line; An elevation guide plate provided at one side of the sliding body to guide the elevation of the traverse assembly; And a cam driving part provided at the other side of the sliding body to rotate the cam member.

The cam driving unit includes a cam driving body coupled to the sliding body and capable of reciprocating together with the sliding body, and at one edge of the cam driving body, a buffer groove in which the cam protrusion is disposed is formed, and the buffer The width of the groove may be larger than the width of the cam protrusion.

The buffer groove may include a first contact end contacting the first side end of the cam protrusion when the disc is loaded; A second contact end contacting the second side end of the cam protrusion when the disc is unloaded; And an inner end disposed between the first contact end and the second contact end and having a groove forming protrusion.

The buffer groove may further include a cam protrusion constraining groove formed between the second contact end and the groove forming protrusion.

The buffer groove may further include a cam protrusion avoidance groove formed between the first contact end and the groove forming protrusion.

1 is a plan view of a disk drive apparatus according to an embodiment of the present invention, and is shown with the cover frame removed.
FIG. 2 is a schematic cross-sectional view sequentially illustrating a process of loading a disk in the disk drive apparatus of FIG. 1.
3 is a schematic cross-sectional view sequentially illustrating a process of unloading a disk in the disk drive apparatus of FIG. 1.
4 is a perspective view illustrating a first embodiment of a roller drive unit provided in the disk drive device of FIG. 1.
5 is a roller supporting member provided in the roller driving unit of FIG. 4.
6 is an upper rotating member and a lower rotating member provided in the roller driving unit of FIG. 4.
7 is a sliding member provided in the roller driving unit of FIG. 4.
8 is a side view of the sliding member for explaining the movement of the lifting projection when loading the disk.
9A to 9D are plan views sequentially showing the operation of the roller driving unit according to the first embodiment when loading a disc.
10 is a side view of the sliding member for explaining the movement of the lifting projections when the disk unloading.
11A to 11E are plan views sequentially illustrating operations of the roller driving unit according to the first embodiment when the disc is unloaded.
12 is a perspective view illustrating a cam member provided in the roller driving unit according to the second embodiment.
13 is a perspective view showing a sliding member provided in the roller driving unit according to the second embodiment.
FIG. 14 is a plan view illustrating the cam driving unit provided in the sliding member of FIG. 13 together with the cam member.
15A to 15D are plan views sequentially illustrating operations of the roller driving unit according to the second embodiment when loading a disc.
16A to 16E are plan views sequentially illustrating operations of the roller driving unit according to the second embodiment when the disc is unloaded.

Hereinafter, a disk drive apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view of a disk drive apparatus according to an embodiment of the present invention, and is shown with the cover frame removed.

Referring to FIG. 1, a disc drive device 1 according to an embodiment of the present invention is an optical disc drive device to which an optical disc such as a CD, a DVD, a BD, or the like is applied. The disc drive device 1 includes a frame 10 (see FIG. 2) including a base frame 20 for receiving a plurality of parts and a cover frame 30 (see FIG. 2) covering the top of the base frame 20. Include. One side of the frame 10 has a slot (not shown) through which the disk enters and exits the frame 10. As such, the disc drive device 1 of FIG. 1 is a slot-in type disc drive device in which a disc is loaded in a slot-in manner.

The disc drive device 1 also includes a spindle motor assembly 40, a traverse assembly 50, and a transfer roller 60.

The spindle motor assembly 40 includes a turntable 41 for supporting a disk and a spindle motor (not shown) for rotationally driving the turntable. As shown in FIG. 2, the turntable 41 includes a disc seating portion 43 on which the disc is seated and a chucking member 42 for chucking the disc to maintain the disc seated on the disc seating portion 43. do. The outer edge region of the chucking member 42 has a protrusion shape so as to be locked to the center hole H (see FIG. 2) of the disk. The spindle motor rotates the turntable 41 on which the disk is seated at a constant speed when in the play mode.

The traverse assembly 50 has a plate shape and is disposed along the diagonal direction of the disc drive device 1. The traverse assembly 50 is equipped with a spindle motor assembly 40 and an optical pickup (not shown) for recording information on the disk or reading the recorded information. The traverse assembly 50 can be lifted up and down. Thus, when the disk is loaded or unloaded, the traverse assembly 50 is lifted up and down with the spindle motor assembly 40 and the optical pickup.

The conveying roller 60 is arranged side by side on the base frame 20 and conveys the disk by applying friction to the disk during loading or unloading of the disk. The base frame 20 includes a gear drive 71 for transmitting the rotational force generated by the roller drive motor 70 and the roller drive motor 70 to provide the rotational force to the feed roller 60 to the feed roller 60. It is.

The base frame 20 is provided with an upward pressure member 21 disposed adjacent to the turntable 41. The upper pressing member 21 is a member that presses the disk upwards when the disk is uncut, a detailed description thereof will be described later.

In the case of the disc drive device 1 of this embodiment, the disc is mounted on the turntable 41 by a self-chucking method. The self-chucking performed in this embodiment will be described with reference to FIGS. 2 and 3.

First, the loading process will be described with reference to FIG. 2. FIG. 2 is a schematic cross-sectional view sequentially illustrating a process of loading a disk in the disk drive apparatus of FIG. 1.

As shown in FIG. 2 (a), the disc D inserted into the disc drive device 1 is transferred to the inside of the disc drive device 1 by a feed roller 60 that rotates in a clockwise direction and is disposed at a chucking position. . In the chucking position, the central hole H of the disk D is disposed directly above the turntable 41.

As shown in FIG. 2 (b), when the traverse assembly D rises up a certain distance after the disc D is placed in the chucking position, the disc D is provided on the inner side of the cover frame 30. Pressed downward by the lower pressing member 31, the chucking member 42 of the turntable 41 is locked in the central hole (H) of the disk (D). In other words, the disk D is chucked to the chucking member 42 of the turntable 41. In the present embodiment, the downward pressure member 31 is provided as a ring member made of rubber.

On the other hand, as shown in Fig. 2 (b), the feed roller 60 is maintained in the contact position with the disk (D) until the chucking of the disk (D) is completed. If the feed roller 60 is spaced apart from the disk D before the chucking of the disk D is completed, the chucking of the disk D may not be performed smoothly because the disk D is deviated from the chucking position. . Therefore, in the present embodiment, the feed roller 60 rotates and maintains contact with the disk D until the chucking of the disk D is completed.

As shown in FIG. 2 (c), when the chucking of the disk D is completed, the feed roller 60 stops rotating and moves to a non-contact position with the disk D, and the traverse assembly 50 descends by a certain distance. Enter play mode. In the play mode, the turntable 41 is rotated by the spindle motor, and at this time, information may be recorded on the disk D seated on the turntable 41 or the recorded information may be reproduced.

Next, the unloading process will be described with reference to FIG. 3. 3 is a schematic cross-sectional view sequentially illustrating a process of unloading a disk in the disk drive apparatus of FIG. 1.

As shown in FIG. 3 (a), when the user presses an eject button, the feed roller 60 rotates counterclockwise, and the traverse assembly 50 rises upward by a predetermined distance.

As shown in Figure 3 (b), when the traverse assembly 50 is lowered by a certain distance after ascending, the disk (D) is pressed upward by the upward pressure member 21 provided in the base frame 20 is turnedtable ( Unchucked from the chucking member 42 of 41. Here, the upward pressure member 21 is a rod (or protrusion) shaped member fixed to the base frame 20. Therefore, the disk D seated on the turntable 41 is in contact with the upper end of the upper pressing member 21 when lowered. In this state, if the traverse assembly 50 is lowered further, the disk D is the upper pressing member 21. It is pushed upwards by the chuck.

On the other hand, the conveying roller 60 is still placed in the non-contact position with the disk D until the unchucking of the disk D is completed. If the feed roller 60 starts contact with the disc D before the undripping of the disc D is completed, the disc D is discharged out of the frame 10 by the feed roller 60 after unchucking. During the process, the chucking member 42 of the turntable 41 may be caught in the central hole D of the disk D. That is, the problem of disk D jamming may occur. Therefore, in the present embodiment, the feed roller 60 is disposed at a position spaced apart from the disk D until the unchucking of the disk D is completed.

More specifically, although not shown, the frame 10 is provided with a positioning member such as a guide lever that contacts the inner edge of the disk D to position the disk D during loading or unloading. The disc D uncensored by this positioning member may be slightly pushed toward the slot (ie, leftward in FIG. 3 (b)). In the present embodiment, the disc D is already slightly moved toward the slot by the positioning member at the time when the feed roller 60 contacts the disc D after unchucking the disc D. In the state, even if the feed roller 60 ejects the disk D, the disk D is not caught by the chucking member 42.

As shown in Figure 3 (c), when the unnching of the disk (D) is completed, the feed roller 60 is moved to the contact position with the disk (D) to discharge the disk (D) out of the frame 10, The traverse assembly 50 descends slightly to enter the standby mode and waits for the disc D to be loaded.

2 and 3, the disc drive device 1 of the present embodiment uses the so-called self-chucking method without the use of clamp members such as magnet clamps and spring clamps. Achieve chucking and unchucking. Therefore, the disk drive apparatus 1 of the present embodiment has the advantage that the clamp member is not provided above the turntable 41, so that the disk drive apparatus 1 can be slimmer than the disk drive apparatuses using the clamp member. For example, the thickness of the disc drive device can be reduced to 15 mm or less.

In addition, as described above, in the disc loading process, the disc roller chucking is prevented by keeping the feed roller 60 in the contact position with the disc until the disc chucking is completed, while in the disc unloading process, the disc is unloaded. By holding the feed roller 60 in a non-contact position with the disc until the chucking is completed, a disc jam problem that may occur during the disc ejection process is prevented.

As such, the feed roller 60 should be in contact with or spaced apart from the disc at appropriate timing during disc loading and unloading. The contact or separation operation of the feed roller 60 with respect to the disk can be performed in a mechanical manner by the roller drive unit 100.

The roller driving unit 100 will be described with reference to FIGS. 4 to 7. 4 is a perspective view illustrating a roller driving unit provided in the disk drive device of FIG. 1, FIG. 5 is a roller supporting member provided in the roller driving unit of FIG. 4, and FIG. 6 is provided in the roller driving unit of FIG. 4. An upper rotating member and a lower rotating member, Figure 7 is a sliding member provided in the roller driving unit of FIG.

4, the roller drive unit 100 provided in the disk drive device 1 of the present embodiment is a roller support member 110, the upper rotating member 120, the lower rotating member 130, sliding The member 140 is included.

The roller supporting member 110 will be described with reference to FIGS. 4 and 5. The roller support member 110 includes a pivot body 111, a pair of roller supports 112 and 113, and a rear protrusion 114.

The pivot body 111 has an approximately long rectangular plate shape. A pair of roller supports 112 and 113 are provided at both ends in the longitudinal direction of the pivot body 111. The roller support grooves 112 and 113 are formed with roller receiving grooves 112b and 113b and shaft insertion holes 112a and 113a. Since both ends of the feed roller 60 are accommodated in the roller accommodation grooves 112b and 113b, the feed roller 60 is supported by the roller support member 110. Rotation shafts 22 and 23 provided in the base frame 20 are inserted into the shaft insertion holes 112a and 113a.

The rear protrusion 114 is provided with a rotating piece 115. When the rotating piece 115 is pressed upward by the upper rotating member 120, the pivot body 111 is rotated about the rotating shafts 22 and 23, and is supported by the roller support parts 112 and 113 at this time. The feed roller 60 is lowered and disposed at a non-contact position (separation position) with the disk. On the other hand, when the rotating piece 115 is not pressurized by the upper rotating member 120, the feed roller 60 is disposed in the contact position with the disk.

An upper rotating member 120 and a lower rotating member 130 will be described with reference to FIGS. 4 and 6.

The upper rotating member 120 includes a rotating body 121 and the pressing jaw 126.

The rotating body 121 is rotatable clockwise or counterclockwise about a rotating shaft (not shown) inserted into the shaft insertion hole 122. The pressure jaw 126 is integrally formed on the circumference of the rotating body 121 and has a horizontal surface 127 disposed horizontally and an inclined surface 128 inclined with respect to the horizontal surface 127. The rotating piece 115 of the above-described roller support member 110 (see FIG. 5) may be lifted upward by the pressing jaw 126 of the upper rotating member 120. That is, when the rotating piece 115 of the roller support member 110 is disposed on the pressing jaw 126 of the upper rotating member 120, the rotating piece 115 is pressed upward by the pressing jaw 126. In this case, the feed roller 60 supported by the roller support member 110 is disposed in a non-contact position with the disk. On the contrary, when the rotating piece 115 of the roller support member 110 is not disposed on the pressure jaw 126 of the upper rotating member 120, the feed roller 60 supported by the roller support member 110 may be in contact with the disk. It is placed in the contact position.

On the circumference of the rotating body 121 of the upper rotating member 120 is provided with a buffer groove 123 formed concave inward. The buffer groove 123 has a first contact surface 124 and a second contact surface 125. The pressing protrusion 133 of the lower rotating member 130 is disposed in the buffer groove 123.

The lower rotating member 130 includes a rotating body 131 and the pressing projection 133. The rotating body 131 is rotatable clockwise or counterclockwise about a rotating shaft (not shown) inserted into the shaft insertion hole 132. Referring to FIG. 6, the same rotation shaft may be inserted into the shaft insertion hole 122 of the upper rotating member 120 and the shaft insertion hole 132 of the lower rotating member 130. That is, the lower rotating member 130 has the same rotation shaft as the upper rotating member 120. A circumferential gear 134 is formed on the circumference of the rotating body 131. The original gear of the lower rotating member 130 meshes with the spur gear 146 of the sliding member 140 (see FIG. 7), which will be described later. Thus, when the sliding member 140 reciprocates, the lower rotating member 130 is clockwise or anticlockwise. Rotate clockwise.

The pressing protrusion 133 of the lower rotating member 130 is disposed in the buffer groove 123 of the upper rotating member 120. When the pressing protrusion 133 presses the first contact surface 124 of the buffer groove 123, the upper rotating member 120 rotates in a clockwise direction, and the pressing protrusion 133 has the second contact surface of the buffer groove 123 ( When pressing the 124, the upper rotating member 120 is rotated in the counterclockwise direction.

As shown in FIG. 6, the distance between the first contact surface 124 and the second contact surface 125 of the buffer groove 123 is much larger than the diameter of the pressing protrusion 133. Therefore, while the lower rotating member 130 is rotating, the pressing protrusion 133 may not come into contact with any of the first contact surface 124 and the second contact surface 125 of the buffer groove 123. In this case, the lower rotating member 130 rotates but the upper rotating member 120 does not rotate. That is, when the lower rotating member 130 rotates, the upper rotating member 120 rotates together or otherwise maintains a stop state.

A sliding member 140 will be described with reference to FIGS. 4 and 7.

The sliding member 140 includes a sliding body 141 and a lifting guide plate 143.

The sliding body 141 has a plate shape, and two sliding guide holes 142a and 142b are formed along the longitudinal direction. The pin members 25a and 25b of the base frame 20 are inserted into the sliding guide holes 142a and 142b to guide the linear reciprocating motion of the sliding body 141. A spur gear 146 is formed at one end in the width direction of the sliding body 141. The spur gear 146 meshes with the circumferential gear 134 of the lower rotating member 130 described above. Accordingly, when the sliding member 140 reciprocates left and right, the lower rotating member 130 may rotate clockwise or counterclockwise.

The elevating guide plate 143 has a plate shape. The elevating guide plate 143 is integrally formed at the other end in the width direction of the sliding body 141 and has an arrangement perpendicular to the sliding body 141. The elevating guide plate 143 is formed with an elevating guide groove 144 whose height is changed. As shown in FIG. 4, the lifting projection 51 provided at one end of the traverse assembly 50 is inserted into the lifting guide groove 144. Accordingly, when the sliding member 140 linearly moves left and right, the lifting protrusion 51 moves up and down along the lifting guide groove 144, and the traverse assembly 50 coupled with the lifting protrusion 51 also moves up and down. Ascend and descend.

The elevating guide groove 144 has four consecutive sections. That is, the elevating guide groove 144 has a first guide groove 144a, a second guide groove 144b, a third guide groove 144c and a fourth guide groove 144d.

The traverse assembly 50 ascends from the first position (standby position), which is the lowest height, to the second position, which is the highest height when the disc is loaded, and then descends to the third position (disc play position), which is the middle height, when the disc is unloaded. The ascend from the third position to the second position and then descends to the first position. The lifting protrusion 51 provided in the traverse assembly 50 at the disc loading and unloading has the same height change as the traverse assembly 50. In this case, the first guide groove 144a accommodates the lifting protrusion 51 at the first position, and the second guide groove 144b guides the lifting and lowering of the lifting protrusion 51 between the first position and the second position. The third guide groove 144c guides the lifting and lowering of the lifting protrusion 51 between the second position and the third position, and the fourth guide groove 144d receives the lifting protrusion 51 at the third position.

8 and 9a to 9d will be described the operation of the roller driving unit (100, 4) when loading the disk. 8 is a side view of the sliding member for explaining the movement of the lifting projection during the disk loading, Figure 9a to 9d is a plan view sequentially showing the operation of the roller driving unit when loading the disk.

As shown in FIG. 8, as the sliding member 140 moves to the right during loading of the disc, the lifting protrusions 51 (see FIG. 4) of the traverse assembly 50 pass from L1 to L2 and L3 through the initial position. Will be reached.

Referring to FIG. 9A, which shows the case where the elevator protrusion 51 is located at L1, the elevator protrusion 51 of the traverse assembly 50 when the disc drive device 1 is in the standby mode, that is, before the disc is inserted. Is accommodated in the first guide groove 144a of the sliding member 140 at the lowest position. In this case, the pressing protrusion 133 of the lower rotating member 130 is adjacent to the second contact surface 125 of the buffer groove 123 of the upper rotating member 120. In addition, the rotating piece 115 of the roller support member 110 (see FIG. 5) is maintained in an unpressurized state by the pressing jaw 120 of the upper rotating member 120. Therefore, when the lifting projection 51 is at the lowest position L1, the feed roller 60 supported by the roller supporting member 110 is disposed at a position (contact position) in contact with the disk.

Referring to Fig. 9B showing the case where the lifting protrusion 51 is located at L2, the chucking of the disc is completed when the lifting protrusion 51 is at the highest position L2 (Fig. 2 (b) shows the chucking of the disc. Is). The lower rotating member 130 is rotated clockwise by the sliding member 140. On the other hand, since the pressing protrusion 133 of the lower rotating member 130 is in a non-contact state with the first contact surface 124 of the buffer groove 123 of the upper rotating member 120, the upper rotating member 120 is stopped. Keep it. In addition, the pressure jaw 126 of the upper rotating member 120 does not press the rotating piece 115 of the roller support member 110. Thus, the feed roller 60 supported by the roller support member 110 at the L2 position where the chucking of the disk is completed still maintains the contact position with the disk.

Referring to FIG. 9C illustrating a case in which the lifting protrusion 51 is located at L3, the upper rotating member 120 is rotated by a clockwise direction by the pressing protrusion 133 of the lower rotating member 130. At this time, the pressing jaw 126 of the upper rotating member 120 presses the pivoting piece 115 of the roller supporting member 110 upward by its inclined surface 128. Therefore, the feed roller 60 supported by the roller support member 110 has a non-contacted position with the disk by the roller support member 110 pivoting at an angle.

Referring to FIG. 9D, which illustrates a case in which the lifting protrusion 51 is located at L4, the lower rotating member 130 and the upper rotating member 120 are further rotated clockwise together. At this time, the pressing jaw 126 of the upper rotating member 120 still presses the rotating piece 115 of the roller support member 110 upward through its horizontal surface 127. The feed roller 60 thus still maintains a non-contact position with the disc.

When paying attention to the movement of the feed roller 60 during the disc loading, the feed roller 60 maintains the contact position with the disc and then switches to the non-contact position with the disc when the lifting projection 51 is at the L3 position. In other words, when the disc is loaded, the feed roller 60 is in the contact position with the disc in the L1-L3 section and in the non-contact position with the disk in the L3-L4 section. Since chucking of the disk is performed at the L2 position, it can be seen that the feed roller 60 moves to a non-contact position with the disk after the chucking of the disk is completed.

10 and 11a to 11e will be described the operation of the roller drive unit 100 (see Fig. 4) when the disk unloading. 10 is a side view of the sliding member for explaining the movement of the lifting projection when the disk unloading, Figures 11a to 11e is a plan view sequentially showing the operation of the roller drive unit when the disk unloading.

As shown in FIG. 10, during the disk unloading, as the sliding member 140 moves to the left side, the lifting protrusions 51 of the traverse assembly 50 move from the initial positions U1 to U5 through U2, U3, and U4. Will be reached. The positions U1, U2, U3, U5 in FIG. 10 correspond to the positions L4, L3, L2, L1 in FIG. 8, respectively.

Referring to FIG. 11A, which illustrates a case in which the lifting protrusion 51 is located at U1, the pressing protrusion 133 of the lower rotating member 130 is disposed adjacent to the first contact surface 124 of the upper rotating member 120. . The pressing jaw 126 of the upper rotating member 120 presses the pivoting piece 115 of the roller supporting member 110 upward by its horizontal surface 127. Therefore, the feed roller 60 supported by the roller support member 110 when the lifting protrusion 51 is at U1 maintains the non-contact position with the disk.

Referring to FIG. 11B, which illustrates a case in which the lifting protrusion 51 is located at U2, the lower rotating member 130 is rotating and the pressing protrusion 133 thereof is the second contact surface 125 of the upper rotating member 120. Is not pressurized. Therefore, the upper rotating member 120 is in a stopped state, and thus the feed roller 60 supported by the roller support member 110 maintains a non-contact position with the disk.

Referring to Fig. 11C showing the case where the lifting projections 51 are located at U3, the lower rotating member 130 is rotating. At this time, the pressing projection 133 of the lower rotating member 130 approaches the second contact surface 125 of the upper rotating member 120, but does not press it, the upper rotating member 120 still maintains the stopped state. Therefore, the feed roller 60 supported by the roller support member 110 maintains the non-contact position with the disk.

Referring to Fig. 11D, which shows the case where the lifting protrusions 51 are located at U4, uncutting of the disc is performed when the lifting protrusions 51 are at the position U4, which is lower than U1 (unchucking of the disc in Fig. 3B). Is shown). At this time, the lower rotating member 130 is rotating and its pressing protrusion 133 presses the second contact surface 125 of the upper rotating member 120. Therefore, the upper rotating member 120 rotates in the same direction with the lower rotating member 130. Thus, the rotating piece 115 of the roller support member 110 is disposed on the inclined surface 128 of the pressing jaw 126 of the upper rotating member 120. That is, the pressing jaw 126 of the upper rotating member 120 still presses the pivoting piece 115 of the roller supporting member 110 upward by its inclined surface 128. Therefore, the feed roller 60 supported by the roller support member 110 at the U4 position where the disc un-chucking is completed still maintains the non-contact position with the disc.

Referring to FIG. 11E illustrating a case in which the lifting protrusions 51 are located at U5, the rotation piece 115 of the roller supporting member 110 is further rotated by the upper rotating member 120 by the lower rotating member 130. Out of the inclined surface 128 of the pressure jaw 126 of the upper rotating member 120. That is, upward pressure of the pressing jaw 126 of the upper rotating member 120 with respect to the pivoting piece 115 of the roll supporting member 110 is released. Therefore, the feed roller 60 supported by the roller support member 110 has a contact position with the disk.

When paying attention to the movement of the feed roller 60 during the disc unloading, the feed roller 60 maintains the non-contact position with the disc in the U1-U4 section and is maintained at the contact position with the disc after the U4 position. Since the unchucking of the disk is performed at the L4 position, it can be seen that when the disk unloading, the feed roller 60 is moved to the contact position with the disk after the disk is unchucked.

8 and 10, as described above, during the disc loading, the feed roller 60 maintains the contact position with the disc in the L1-L3 section and then switches to the non-contact position with the disc after L3, while the disc unloading. The feed roller 60 maintains the non-contact position with the disk in the U1-U4 section and then switches to the contact position with the disk after L4. From this, it can be understood that in the period U2 (corresponding to L3) -U4, the feed roller 60 has a contact position with the disc when the disc is loaded while a non-contact position with the disc when the disc is unloaded. .

As such, the position of the feed roller 60 and the position of the disc unloading feed roller 60 when the disc is loaded in the U2-U4 section is different from that of the buffer groove wider than the pressing protrusion 133 in the upper rotating member 120 ( 123), because the upper rotation member 120 rotates only the lower rotation member 130 for a predetermined time during the loading or unloading of the disk. If there is no buffer groove 123 in the upper rotating member 120, the upper rotating member 120 and the lower rotating member 130 is always rotated together, the position of the feed roller 60 in the U2-U4 section is always the same do.

In summary, in this embodiment, by forming the buffer groove 123 in the upper rotating member 120, the feed roller 60 is in contact with the disk in the U2-U4 section when the disk loading, but U2 when the disk unloading Controlled not to come into contact with the disk in the -U4 section. As the feed roller 60 is controlled as described above, the contact between the feed roller 60 and the disc may be released after the disc chucking is completed during disc loading, and the feed roller 60 after the unchucking of the disc is completed during disc unloading. Contact with the disk may be initiated.

As described above, if the feed roller 60 does not support the disc until the chip is completed, the disc may be out of the chucking position and an error may occur in the chucking of the disc. In addition, when the conveying roller 60 contacts the disc and conveys it before the disc is completely unchucked, a problem may occur that the disc is caught by the chucking member 42 of the turntable 41 (see FIG. 2).

However, in the present embodiment, by forming the buffer groove 123 in the upper rotating member 120, after the chucking of the disk is completed, the contact between the feed roller 60 and the disk is released, while the disk after the uncuting is completed Since the contact between the feed roller 60 and the disc is started, malfunction of the disc chucking or disc jam can be prevented.

12 to 14, a second embodiment of the roller drive unit, which is alternative to the roller drive unit 100 shown in Fig. 3, will be described. 12 is a perspective view illustrating a cam member provided in the roller driving unit according to the second embodiment, FIG. 13 is a perspective view illustrating a sliding member provided in the roller driving unit according to the second embodiment, and FIG. 13 is a plan view showing the cam driving unit provided in the sliding member 13 together with the cam member.

12 to 14, the roller driving unit according to the second embodiment, the roller support member 110 (same as the roller support member shown in Figure 5), the cam member 220, and the sliding member 240 It includes.

Here, the roller support member 110 is the same as the roller support member shown in Figure 5, so a detailed description thereof will be omitted.

As shown in FIG. 12, the cam member 220 includes a rotating body 221, a pressure jaw 226, and a cam protrusion 234. The cam member 220 may be understood as a combination of the upper rotating member 120 and the lower rotating member 130 shown in FIG.

The rotating body 221 is rotatable clockwise or counterclockwise about a rotating shaft (not shown) fastened to the shaft insertion hole 222.

The pressing jaw 226 extends in a direction perpendicular to the rotating body 221 on the outer circumference of the rotating body 221. The pressure jaw 226 has a horizontal surface 227 disposed horizontally and an inclined surface 228 having an inclination with respect to the horizontal surface. For reference, the shape and function of the pressing jaw 226 corresponds to the pressing jaw 126 of the upper rotating member 120 illustrated in FIG. 6.

Thus, the rotating piece 115 (see FIG. 5) of the roller support member 110 may be lifted upward by the pressing jaw 226 of the cam member 220. Referring to FIG. 5, when the pivoting piece 115 of the roller support member 110 is lifted upward, the roller support member 110 moves in one direction about its rotating shafts 22 and 23. (Clockwise in the drawing) The feed roller 60 supported by the roller support member 110 is pivoted downward by pivoting, and the roller support member 110 when the rotating piece 115 of the roller support member 110 descends downward. ) Is pivoted in the opposite direction (counterclockwise in FIG. 5) about its rotating shafts 22, 23 so that the feed roller 60 is lifted upwards.

The cam protrusion 234 protrudes outwardly horizontally with respect to the rotating body 221 from the outer circumference of the rotating body 221. Cam protrusion 234 is disposed on the opposite side of the inclined surface 228 of the pressure jaw 226. The cam protrusion 234 is pressed by the sliding member 240 to be described later receives a rotational force from the sliding member 240. The cam protrusion 234 has two opposite edges, that is, the first side end 234a and the second side end 234b. The detailed description about these 1st side end 234a and the 2nd side end 234b is mentioned later.

As shown in FIG. 13, the sliding member 240 includes a sliding body 141 and a lifting guide plate 143.

Comparing the sliding member 240 and the sliding member 140 of the above-described embodiment illustrated in FIG. 7, the sliding member 140 is completely the same in the elevating guide plate 143, but the sliding member 140 in FIG. 7 is the sliding body 141. ) Is provided with a spur gear 146 at one side edge of the sliding body 141 in the width direction, whereas in the case of the sliding member 240 of FIG. 13, the cam driving unit 250 is provided instead of the spur gear 146. Is different. Therefore, as reference numbers displayed on the sliding member 240 of FIG. 13, except for the cam driving unit 250, the same reference numerals indicated on the sliding member 140 of FIG. 7 are applied to the same.

As shown in FIG. 13, the lifting guide plate 143 is provided at one side in the width direction of the sliding body 141, and the cam driving unit 250 is provided at the other side in the width direction. Although the cam driver 250 is screwed detachably to the sliding body 141, in alternative embodiments, the cam driver 250 may be integrally formed with the sliding body 141.

As shown in FIG. 14, the cam driving unit 250 includes a cam driving body 251 coupled to the sliding body 141, and the cam driving body 251 has a buffer recessed from one side edge 251a thereof. The groove 252 is formed. Note that the buffer groove 252 of the cam driving unit 250 performs a function of the buffer groove 123 formed in the upper rotating member 120 according to the first embodiment.

The buffer groove 252 has an approximately trapezoidal shape and has first and second contact ends 253 and 254 facing each other and an inner end 255 disposed therebetween.

Here, the first contact end 253 is in contact with the first side end 234a of the cam protrusion 234 when the disc is loaded, the second contact end 254 is the second side end of the cam protrusion 234 when the disc unloading 234b. As can be seen from FIG. 14, the width between the first contact end 253 and the second contact end 254 is the width between the first side end 234a and the second side end 234b of the cam protrusion 234. Greater than

The inner end 255 of the buffer groove 252 is provided with a groove forming protrusion 255a. Thus, a cam projection constraining groove 257 is formed between the groove forming protrusion 255a and the second contact end 254 in the buffer groove 252 and between the groove forming protrusion 255a and the first contact end 253. Cam projection avoidance groove 258 is formed. Here, the cam projection constraining groove 257 is inserted into the cam projection 234 when the disk unloading, the disk (D) and the cover frame 30 may be generated due to the unwanted high-speed rotation of the cam member 220, Fig. 3) to prevent collisions and the resulting noise. On the other hand, the cam protrusion avoidance groove 258 provides an evacuation space of the cam protrusion 234 so that the end of the cam protrusion 234 is not caught inside the buffer groove 252 when the disc is loaded.

The operation of the roller drive unit according to the second embodiment described above will be described at the time of disc loading and disc unloading.

First, an operation of loading a disc will be described with reference to FIGS. 15A to 15D, where it is necessary to understand that FIGS. 15A to 15D correspond to those of FIGS. 9A to 9D described above.

As already described with reference to FIG. 8 in the first embodiment, as the sliding member 240 moves to the right during disc loading, the lifting protrusions 51 (see FIG. 4) of the traverse assembly 50 are L1, L2, L3. Is reached via L4, where L1 represents the initial position.

Reference is made to FIG. 15A showing the case where the lifting projections 51 are located at L1. In this case, the lifting protrusion 51 is disposed in the first guide groove 144a (see FIG. 8) of the sliding member 240. In addition, the cam protrusion 234 has a second side end 234b of the cam protrusion 234 adjacent to the second contact end 254 of the buffer groove 252, and the rotation piece 115 of the roller support member 110 is illustrated in FIG. 5. ) Is not lifted by the pressing jaw 120 of the cam member 220. Thus, when the elevating protrusion 51 is at L1 (initial position), the feed roller 60 (see FIG. 5) supported by the roller supporting member 110 is disposed at the "contact position" with respect to the disk.

Reference is made to FIG. 15B which shows a case where the lifting projection 51 is located at L2. At this time, chucking of the disk is completed (see FIG. 2B). Since the cam protrusion 234 does not contact the first contact end 253 of the buffer groove 252, the cam member 220 still maintains the stop state. Therefore, at the time when the disc chucking is completed, the feed roller 60 still maintains the "contact position" with the disc.

Reference is made to FIG. 15C which shows a case where the lifting projection 51 is located at L3. At this time, the first contact end 253 of the sliding member 240 moving to the right presses the first side end 234a of the cam protrusion 234 so that the cam member 220 rotates in the clockwise direction. Since the rotating piece 115 of the roller support member 110 is lifted onto the inclined surface 228 of the pressure jaw 226 of the cam member 220, the feed roller 60 supported by the roller support member 110 is lowered. Has a "non-contact position" with the disk. Meanwhile, as shown in FIG. 15C, when the first contact end 253 of the sliding member 240 presses the first side end 234a of the cam protrusion 234, the end of the cam protrusion 234 is buffered. It is partially inserted into the cam projection avoidance groove 258 in the groove 252.

Reference is made to FIG. 15D which shows a case where the lifting projection 51 is located at L4. It can be seen that the cam member 220 is rotated more clockwise. Therefore, the rotating piece 115 of the roller support member 110 is disposed on the horizontal surface 227 of the pressure jaw 226 of the cam member 220. At this time, since the rotating piece 115 of the roller support member 110 still has a position lifted upward by the pressing jaw 226, the feed roller 60 supported by the roller support member 110 is still a disk. Maintain a "non-contact position" with the.

Note the movement of the feed roller 60 in the above description with reference to Figs. 15A to 15D, the feed roller 60 is moved with the disc until the lifting projection 51 is disposed at the L2 position (the position at which the disc is chucked). While maintaining the contact position, the lifting projection 51 is switched to the non-contact position with the disc when the lifting projection 51 is disposed at the approximately L3 position between L2 and L4. From this, it can be seen that the feed roller 60 moves to the non-contact position with the disc only after the chucking of the disc is completed at the disc loading time.

Next, an operation of loading a disc will be described with reference to FIGS. 16A to 16E, where it is necessary to understand that FIGS. 16A to 16E correspond to those of FIGS. 11A to 11E described above.

As already described with reference to FIG. 10 in the first embodiment, as the sliding member 240 moves to the left during the disc unloading, the lifting projections 51 of the traverse assembly 50 move from the initial positions U1 to U2, U5 is reached via U3, U4, where the U1, U2, U3, U5 positions correspond to the L4, L3, L2, L1 positions in FIG. 8, respectively.

Reference is made to FIG. 16A showing the case where the lifting projections 51 are disposed at U1. At this time, the cam protrusion 234 of the cam member 220 has its first side end 234a adjacent to the first contact end 253 of the buffer groove 252. And, since the rotating piece 115 (see FIG. 5) of the roller supporting member 110 is lifted on the horizontal surface 227 of the pressure jaw 226, the feed roller 60 (see FIG. 5) is "non-contact with the disk. Position ".

Reference is made to FIG. 16B showing the case where the lifting projections 51 are disposed at U2. At this time, the sliding member 240 is sliding in the left direction, but since the cam member 220 is not pressurized by the sliding member 240, the cam member 220 does not rotate and the feed roller 60 is still with the disk. Maintain the "non-contact position".

Reference is made to FIG. 16C which shows the case where the lifting projections 51 are disposed at U3. FIG. 16C shows the second contact end 254 of the sliding member 240 in contact with the second side end 234b of the cam protrusion 234 but immediately before pressing it. Accordingly, the cam member 220 has not yet started rotating and the feed roller 60 still maintains the "non-contact position" with the disk.

Reference is made to FIG. 16D showing the case where the lifting projections 51 are disposed at U4. In this manner, " uncutting of the disc " is performed at the time when the lifting projection 51 is located at U4 (see FIG. At this time, the cam member 220 is rotated counterclockwise by pressing the cam protrusion 234 by the second contact end 254 of the sliding member 240. At this time, the rotating piece 115 of the roller support member 110 is slightly lowered from the horizontal surface 227 of the pressure jaw 226 to the inclined surface 228, but the feed roller 60 is still lifted on the pressure jaw 226 It maintains its "non-contact position" with the disk.

As shown in FIG. 16D, during the disc unloading, when the cam member 220 is rotated counterclockwise by the sliding member 240, the end of the cam protrusion 234 is cam in the buffer groove 252. It can be seen that the protrusion is inserted into the restraint groove 257. As such, when the cam member 220 rotates in the counterclockwise direction, the end portion of the cam protrusion 234 is constrained to the cam protrusion restraint groove 257, so that the linear linear rotation speed of the cam member 220 is the sliding speed of the sliding member 240. Can be controlled to be equal to

If the cam protrusion restriction groove 257 is not present, the cam member 220 rotates counterclockwise with an excessively high rotational speed at the time when the sliding member 240 starts to press the cam member 220. Can be generated. In such a case, as the feed roller 60 is lifted at a high speed and hits the unchucked disc upwards, the disc collides with the upper disc frame 30 (see FIG. 3), and noise may be generated accordingly.

However, according to the roller driving unit of the present embodiment, the sliding member 240 is provided with a cam projection restriction groove 257 for restraining the sudden rotation of the cam member 220 by restraining the cam projection 234 when the disk unloading. Therefore, the collision between the uncut disk and the cover frame 30 and the resulting noise can be prevented.

Reference is made to FIG. 16E showing the case where the lifting projections 51 are disposed at U5. It can be seen that the cam member 220 is further rotated in the counterclockwise direction, and the rotation piece 115 of the roller support member 110 is completely out of the pressure jaw 226. Thus, the feed roller 60 supported by the roller support member 110 has a "contact position" with the disk.

Note the movement of the feed roller 60 in the above description with reference to Figs. 16A to 16E. The feed roller 60 is characterized in that the disc and While maintaining the non-contacting position of U 4, and has a contact position with the disk after U4. Therefore, it can be seen that the feed roller 60 moves to the contact position with the disc after the disc unloading is completed when the disc is unloaded.

As described above, according to the roller driving unit according to the second embodiment, as in the above-described first embodiment, the feed roller 60 is switched over to non-contact with the disc after chucking of the disc is performed during disc loading. When the disk is unloaded, the disk is switched to the contact position with the disk after the disk is uncut. Therefore, according to the roller driving unit of the second embodiment, the chucking error that may occur due to the disc being out of the chucking position can be prevented, and the feed roller 60 may be caused by the contact of the disc before the disc unchucking. The problem that the disk is caught in the chucking member 42 of the turntable 41 can be prevented.

In addition, as described above, the sliding member 240 is provided with a cam projection restriction groove 257 for restraining the sudden rotation of the cam member 220 by restraining the cam projection 234 when the disk unloading, Collision between the chucked disk and the cover frame 30 and the resulting noise can be prevented.

1: disk drive unit 10: frame
20: base frame 21: upward pressure member
30: cover frame 31: downward pressure member
41: turntable 42: chucking member
43: disk seat 50: traverse assembly
51: lifting projection 60: feed roller
70: roller driving motor 100: roller driving unit
110: roller support member 120: upper rotating member
123: buffer groove 126: pressure jaw
127: horizontal plane 128: inclined plane
130: lower rotating member 133: pressing projection
140: sliding member 144: lifting guide groove
220: cam member 234: cam projection
226: pressure jaw 240: sliding member
250: cam drive unit 252: buffer groove
257: cam projection restraint groove 258: cam projection avoidance groove

Claims (28)

A frame having a slot for insertion of the disc;
A spindle motor assembly comprising a turntable having a disc seat and a chucking member, and a spindle motor for rotationally driving the turntable;
A traverse assembly mounted with the spindle motor assembly and capable of lifting up and down;
A conveying roller which is movable between a contact position with said disk and a non-contact position with said disk, and conveys said disk by a friction force; And
And a roller driving unit for moving the feed roller from the non-contact position to the contact position after the disc unloading is completed. The method of claim 1,
The roller drive unit is a slot-in type disk drive apparatus for moving the feed roller from the contact position to the non-contact position after the chucking of the disk is completed when loading the disk. The method of claim 2, wherein the roller driving unit,
A roller support member pivotally mounted to the frame and supporting the feed roller;
An upper rotating member rotating in a clockwise or counterclockwise direction and rotating the roller support member;
A lower rotating member disposed below the upper rotating member and driving to rotate the upper rotating member; And
And a sliding member which reciprocates in a straight line and drives the lower rotating member to rotate. The method of claim 3, wherein the upper rotating member,
Rotating body; And
And a pressing jaw protruding from the rotating body and configured to rotate the roller support member. The pressure jaw of claim 4,
A horizontal plane disposed horizontally; And
And an inclined surface connected to the horizontal surface and formed to be inclined with respect to the horizontal surface. The method of claim 4, wherein
And a slot-in type disk drive device having a recessed buffer groove formed in the rotating body of the upper rotating member. The method of claim 6, wherein the lower rotating member,
Rotating body; And
And a pressing protrusion protruding from the rotating body and rotating the upper rotating member. The method of claim 7, wherein
And a pressurizing protrusion of the lower rotating member is disposed in the buffer groove of the upper rotating member. The method of claim 7, wherein
And a width of the buffer groove is larger than that of the pressing protrusion. The method of claim 7, wherein
And a slot-in type disk drive device having a circular gear formed on a rotating body of the lower rotating member. The method of claim 3, wherein the sliding member,
A sliding body capable of reciprocating in a straight line;
An elevation guide plate provided at one side of the sliding body to guide the elevation of the traverse assembly; And
And a spur gear provided on the other side of the sliding body to rotate the lower rotating member. The method of claim 11,
One end of the traverse assembly is provided with a lifting projection, the lifting guide plate is a slot-in type disk drive device formed with a lifting guide groove for guiding the movement of the lifting projection. The method of claim 3, wherein the roller support member,
Pivotable pivot bodies;
A pair of roller support parts provided at both ends of the pivot body; And
And a rotating piece provided at one side of the pivot body and pressed by the upper rotating member. The method of claim 13, wherein each of the roller support portion,
A roller accommodation groove in which one end of the feed roller is accommodated; And
And a shaft insertion hole into which the rotation shaft provided in the frame is inserted. The method of claim 1,
The frame includes a base frame for receiving a plurality of parts of the disk drive device and a cover frame covering the base frame,
The inner side surface of the cover frame is provided with a downward pressing member for pressing down the central portion of the disk when the disk is chucked to the chucking member,
And the base frame is provided with an upper pressing member for urging the central portion of the disk upward when the disk is unchucked from the chucking member. 16. The method of claim 15,
And the lower pressing member has a ring shape and the upper pressing member has a rod shape. The method of claim 2,
The traverse assembly is a disc play position between the first position and the second position after the disc is raised from a first position, which is the lowest height, to a second position, which is the highest height that the disc is chucked to the chucking member. Slot-in type disk drive unit descending to three positions. 18. The method of claim 17,
And the traverse assembly ascends from the third position to the second position and then descends to the first position upon disk unloading. 19. The method of claim 18,
And slotting-in type disc drive when the traversing assembly is in a fourth position between the second position and the third position upon disc loading. 20. The method of claim 19,
And a slot-in type disc drive device, wherein the disc unloading is completed when the traverse assembly is in a fifth position between the second position and the first position. The method of claim 2, wherein the roller driving unit,
A roller support member pivotally mounted to the frame and supporting the feed roller;
A cam member that rotates in a clockwise or counterclockwise direction and pivotally drives the roller support member; And
And a sliding member which reciprocates in a straight line and rotationally drives the cam member. The method of claim 21, wherein the cam member,
Rotating body;
A pressing jaw protruding upward from the rotating body and configured to pivot the roller support member; And
And a cam protrusion protruding horizontally from the rotating body and receiving rotational force from the sliding member. The method of claim 22, wherein the pressure jaw,
A horizontal plane disposed horizontally; And
And an inclined surface connected to the horizontal plane and formed to be inclined with respect to the horizontal plane. The method of claim 22, wherein the sliding member,
A sliding body capable of reciprocating in a straight line;
An elevation guide plate provided at one side of the sliding body to guide the elevation of the traverse assembly; And
And a cam driver provided on the other side of the sliding body to rotate the cam member. 25. The method of claim 24,
The cam driving unit includes a cam driving body coupled to the sliding body and capable of reciprocating together with the sliding body,
A buffer groove in which the cam protrusion is disposed is formed at one side edge of the cam driving body, and the width of the buffer groove is larger than the width of the cam protrusion. The method of claim 25, wherein the buffer groove,
A first contact end contacting the first side end of the cam protrusion when the disc is loaded;
A second contact end contacting the second side end of the cam protrusion when the disc is unloaded; And
And an inner end disposed between the first contact end and the second contact end, the groove forming protrusion being formed therein. The method of claim 26,
And the buffer groove further comprises a cam projection constraining groove formed between the second contact end and the groove forming projection. The method of claim 26,
The buffer groove further comprises a cam projection avoidance groove formed between the first contact end and the groove forming projection.

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