JP2008262639A - Accidental insertion prevention mechanism for disk player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accidental insertion prevention mechanism for a disk player, capable of surely preventing accidental insertion of the disk. <P>SOLUTION: In the blocking part 9a of a shutter 9 for covering the center of a disk insertion port 3 to block the insertion of a disk, a reception part 9b abutted on the outer peripheral edge of the inserted disk to apply a rotational force of a releasing direction to the shutter 9, and a projection 9c projected from the upper end of the reception part 9b to engage the upper surface side of the disk are formed. When a second disk is forcedly inserted into the center of the disk insertion port 3 from the position of the shutter 9 slanted to a rotational support point side, by locking the upper surface side of the disk in the projection 9c in the abutted state of the outer peripheral edge of this disk on the reception part 9b, the movement of the shutter 9 in a releasing direction is regulated to surely prevent the accidental insertion of the second disk. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disc player for recording and / or reproducing a disc such as a CD or a DVD, and in particular, a disc that prevents insertion of another disc when one disc is inserted in the apparatus. The present invention relates to a player's erroneous insertion prevention mechanism.

  In general, in an in-vehicle disc player, a slit-like disc insertion slot is formed in the front plate covering the front of the device, so that when a desired disc has already been inserted into the device, another disc is accidentally changed. There is a risk of the disc being inserted from the disc insertion slot. Therefore, conventionally, a shutter whose front end is a blocking portion is rotatably supported on the front plate, and when the first disc is inserted into the apparatus from the disc insertion slot, the shutter is rotated to insert the disc. An erroneous insertion prevention mechanism is known in which a part of the mouth is covered with a blocking portion to prevent another disk from being inserted into the apparatus (for example, see Patent Document 1).

  FIG. 8 is an explanatory view showing a conventional erroneous insertion prevention mechanism disclosed in Patent Document 1, and as shown in FIG. 8, a pair of shutters 101 are rotatable on a front plate 100 covering the front of the apparatus. It is supported. The front plate 100 is provided with a slit-shaped disk insertion slot 102, through which the disk can be inserted / extracted from the apparatus. Although not shown in the figure, the device has a disk transport mechanism that is configured by pivotally supporting a roller on a rotatable roller bracket, a turntable that rotates the disk, and a rotating disk. An optical pickup or the like for recording and / or reproducing information is provided.

  Both shutters 101 are pivotally supported on the front side of the front plate 100 using pins 103, and these shutters 101 are arranged at symmetrical positions with respect to a vertical line passing through the center of the disk insertion slot 102. Both shutters 101 can rotate between a closed position shown in FIG. 8 (a) and an open position shown in FIG. 8 (b) by using a pin 103 as a rotation fulcrum. A roller bracket is used. The front end side of both shutters 101 is a blocking portion 101a, and an engagement hole 101b is formed at a position closer to the pin 103 than the blocking portion 101a. A driving unit 104 is engaged with each of the engagement holes 101b, and the driving unit 104 moves up and down in a through hole 105 formed in the front plate 100. Both the drive units 104 are provided integrally with the roller bracket, and both shutters 101 are rotated by the drive unit 104 moving up and down in the through hole 105 as the roller bracket rotates.

In the erroneous insertion prevention mechanism schematically configured in this way, when the disk is in a standby state where it is not inserted into the apparatus, the drive unit 104 is engaged at a position below the through hole 105 as shown in FIG. The shutter 101 is engaged with the joint hole 101b, and the both shutters 101 are held at an open position where the disc insertion slot 102 is opened. When an arbitrary disc is inserted into the apparatus from the disc insertion slot 102 in this standby state, the disc is automatically conveyed to the play position by the rotational driving force of the roller supported by the roller bracket, and the center portion of the disc is turned. Immediately before being clamped to the table, the roller bracket is rotated and the roller is separated from the lower surface of the disk. Further, as the roller bracket rotates, the drive unit 104 moves up in the through hole 105, so that both shutters 101 are rotated from the open position to the closed position as shown in FIG. The vicinity of the center of the disc insertion slot 102 is covered with a pair of blocking portions 101a. Therefore, even if an attempt is made to insert the second disc into the disc insertion slot 102 in this state, the disc is prevented from being inserted into the disc insertion slot 102 by the both blocking portions 101a.
JP 2004-318965 A (page 5-7, FIG. 4)

  However, in the above-described conventional erroneous insertion prevention mechanism, when both the shutters 101 are in the closed position, the second disk is largely offset outward from the center of the disk insertion slot 102, for example, FIG. When it is forcibly inserted between the left shutter 101 shown in (a) and the left end of the disk insertion slot 102, a large rotational moment in the opening direction (clockwise direction in the figure) is applied to the left shutter 101 by the insertion force. This causes a problem that a part of the shutter drive mechanism including the drive unit 104 that presses the shutter 101 in the closing direction is deformed or damaged. In particular, when either one of the two shutters 101 is omitted and the blocking portion 101a of the other shutter 101 covers the central portion of the disc insertion slot 102, both the left and right ends of the disc insertion slot 102 are blocked. Since a relatively large gap exists between the portion 101a and the disk is forcibly inserted through the gap, the problem of damage to the shutter drive mechanism described above becomes significant.

  If a spring member such as a torsion spring is interposed between the shutter and the shutter drive mechanism and the driving force of the shutter drive mechanism is transmitted to the shutter via this spring member, the shutter is held in the closed position. Even if a rotational moment in the opening direction is generated in the released shutter, the rotational moment can be absorbed by the bending of the spring member, so that the shutter drive mechanism will not be deformed or damaged. If the disc is forcibly inserted with a large force, the shutter will be opened, and there will be a problem that it is impossible to reliably prevent erroneous insertion of the disc.

  The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to provide an erroneous insertion prevention mechanism for a disc player that can reliably prevent an erroneous insertion of a disc.

  In the present invention, when the second disk is inserted from a position deviated toward the rotation fulcrum side of the shutter with respect to the central part of the disk insertion slot, the disk receives the insertion force of the disk and tries to rotate in the opening direction. By utilizing the rotational moment of the shutter, the protrusion formed on the shutter blocking portion is locked to the upper surface side of the disk, thereby restricting the movement of the shutter in the opening direction so that the disk cannot be inserted any more.

  The mechanism for preventing erroneous insertion of a disc player according to the present invention includes a shutter blocking portion that covers a part of the disc insertion slot and prevents the insertion of the disc, and abuts against the outer peripheral edge of the disc to be inserted and rotates in the opening direction to the shutter. Since a receiving portion for applying force and a protrusion that protrudes from the upper end of the receiving portion and can be locked on the upper surface side of the disc are formed, the second disc is a shutter with respect to the central portion of the disc insertion slot. Even if the disk is forcibly inserted from a position biased toward the rotation fulcrum side, the upper surface side of the disk is locked to the protrusion while the outer peripheral edge of the disk is in contact with the receiving portion, thereby By restricting the movement in the opening direction, it is possible to reliably prevent erroneous insertion of the second disk.

  The present invention comprises a front plate having a disc insertion slot, a shutter supported rotatably on the front plate, and a drive member for rotating the shutter between a closed position and an open position, When the shutter is in the closed position, a blocking part provided on the front end side of the shutter covers a part of the disk insertion slot to block the insertion of the disk, and when the shutter is in the open position, the blocking part is In the erroneous insertion prevention mechanism of the disc player that allows the disc insertion by opening the disc insertion opening, a side edge of the blocking portion serves as a receiving portion and a protrusion is formed on the upper end of the receiving portion, When a disc is inserted from a position deviated toward the rotation fulcrum side of the shutter with respect to the central portion of the disc insertion slot, the outer peripheral edge of the disc is brought into contact with the receiving portion and the shutter rotates in the opening direction. Power With conferring to the upper surface of the disk so as to engaged with the projection.

  With the misinsertion prevention mechanism of the disc player configured as described above, during the play operation of an arbitrary disc, the second disc cannot be forced from the position where the second disc is biased toward the rotation fulcrum side of the shutter with respect to the central portion of the disc insertion slot. When the disc is inserted into the disc, the outer peripheral edge of the disc comes into contact with a receiving portion formed on one side edge of the blocking portion, thereby generating a rotational moment to rotate the shutter in the opening direction. As a result, the protrusion formed on the upper end of the receiving portion is locked to the upper surface side of the disk, so that the movement of the shutter in the opening direction is restricted and the disk cannot be inserted any more.

  In the above configuration, the receiving portion of the shutter may extend in an oblique direction with respect to the disc insertion slot. However, when the shutter is in the closed position, the receiving portion extends in the disc insertion direction within the disc insertion slot. If the disk extends in a direction substantially perpendicular to the disk, the outer peripheral edge of the disk can be brought into contact with the receiving part over the entire thickness direction, so that the insertion force of the disk is reliably transmitted to the receiving part. This is preferable.

  In the above configuration, if a spring member is interposed between the shutter and the drive member so that the driving force of the drive member is transmitted to the shutter via the spring member, the dimensional error of the shutter and the drive member is reduced. It is preferable that it can be absorbed by the spring member.

  An embodiment will be described with reference to the drawings. FIG. 1 is a front view showing the erroneous insertion prevention mechanism of the disc player according to the embodiment, FIG. 2 is a perspective view of the erroneous insertion prevention mechanism seen from the back side, and FIG. FIG. 4 is an explanatory view showing the operation of the erroneous insertion prevention mechanism, FIG. 4 is an explanatory view showing a relationship between a shutter provided in the erroneous insertion prevention mechanism and a disc inserted by mistake, and FIG. 5 is a perspective view showing a main part of the disc player. 6 is a perspective view showing a main part of a shutter drive mechanism provided in the disc player, and FIG. 7 is an operation explanatory view of the shutter drive mechanism.

  As shown in FIGS. 5 and 6, a front plate 2 is attached to the housing 1 that forms the outer shell of the disc player, and a disc is inserted into and ejected from the housing 1 on the front plate 2. A horizontally long disk insertion slot 3 is formed. A roller bracket 4 is disposed inside the housing 1, and the roller bracket 4 is rotatably supported on the left and right side walls of the housing 1. A roller 5 is pivotally supported at the rear end portion of the roller bracket 4, and this roller 5 is rotationally driven in both forward and reverse directions by using a motor (not shown) as a drive source. The roller 5 faces the lower surface of a guide member (not shown) disposed on the upper surface side of the housing 1, and the roller 5 is always pressed against the lower surface of the guide member by urging the roller bracket 4 with a coil spring 6. It is biased in the direction. A drive lever 7 is attached to one side of the roller bracket 4, and the tip of the drive lever 7 is exposed in a through hole 2 a formed in the front plate 2.

  Slide members 8 (one of which is not shown) are respectively disposed on the left and right side walls of the housing 1, and these slide members 8 reciprocate in the front-rear direction of the housing 1 using a motor (not shown) as a drive source. It is like that. A plurality of cam grooves are formed in the slide member 8, and the end of the shaft that supports the roller 5 is engaged with the cam groove 8a on the front end side. As a result, the relative position between the cam groove 8 a and the shaft changes as the slide member 8 moves forward and backward, and the roller bracket 4 that supports the shaft rotates integrally with the drive lever 7. That is, as shown in FIG. 7A, when the slide member 8 is in the forward position, the shaft end 5a is engaged with the innermost portion of the cam groove 8a, and the roller 5 is separated from the guide member. Held in the lower position. When the slide member 8 moves in the direction of arrow A from this state, the shaft end portion 5a relatively moves toward the front end side of the cam groove 8a, so that the roller bracket 4 and the drive lever 7 rotate counterclockwise in the figure. Move. When the slide member 8 moves to the retracted position, as shown in FIG. 7B, the shaft end portion 5a moves to the front side of the cam groove 8a, and the roller 5 is in an upper position where it is pressed against the guide member. Retained. Further, when the slide member 8 moves in the direction of arrow B from the state shown in FIG. 7B, the shaft end 5a moves relatively to the back side of the cam groove 8a contrary to the above. The drive lever 7 rotates in the clockwise direction in FIG. When the slide member 8 moves to the forward movement position, as shown in FIG. 7A, the shaft end portion 5a moves to the innermost portion of the cam groove 8a, and the roller 5 is spaced apart from the guide member. Held in position.

  In addition, inside the housing 1, there are a turntable for rotationally driving the disk conveyed to the play position, and an optical pickup for recording and / or reproducing information on the rotating disk (none of which are shown). Etc. are arranged.

  As shown in FIGS. 1 to 4, a shutter 9 is pivotally supported by a pin 10 on the front surface side of the front plate 2, and the shutter 9 is shown in FIG. It can rotate between the closed position and the open position shown in FIG. The distal end side farthest from the rotation fulcrum of the shutter 9 is a blocking portion 9a, and the blocking portion 9a covers the central portion of the disk insertion port 3 to prevent the disk from being inserted. The blocking portion 9a has a pair of side edges extending in parallel with each other, and one of the side edges closer to the rotation fulcrum is a receiving portion 9b. A protrusion 9c is formed at the upper end of the receiving portion 9b, and the lower end of the protrusion 9c protrudes in a direction perpendicular to the receiving portion 9b. When the shutter 9 is in the closed position shown in FIG. 1A, the receiving portion 9b extends in the vertical direction within the disc insertion slot 3, and the protrusion 9c is located near the upper side of the disc insertion slot 3. .

  On the other hand, first to third bent pieces 9d, 9e, 9f are formed on the rear end side of the shutter 9 close to the rotation fulcrum, and these bent pieces 9d, 9e, 9f are provided on the front plate 2. The through hole 2b is inserted and reaches the back side of the front plate 2. As shown in FIGS. 2 and 3, a coil spring 11 is stretched between the first bent piece 9 d and the lower end portion of the front plate 2, and the shutter 9 moves in the opening direction by the coil spring 11. It is energized. A drive arm 12 is rotatably supported on the back side of the front plate 2. The drive arm 12 is rotationally driven by the tip of a drive lever 7 that moves up and down in the through hole 2a. . Further, a winding portion of the torsion spring 13 is supported on the pin 10, and both arms of the torsion spring 13 are hooked to the second bent piece 9 e and the drive arm 12. Therefore, as shown in FIG. 3B, when the tip of the drive lever 7 is at the lower position in the through hole 2a, the shutter 9 is held in the open position by the spring force of the coil spring 11, but FIG. As shown to (a), when the front-end | tip of the drive lever 7 raises the inside of the through-hole 2a, and the drive arm 12 rotates counterclockwise, the torsion spring 13 will be accumulated with the rotation of the drive arm 12. Therefore, the shutter 9 rotates to the closed position against the spring force of the coil spring 11.

  In the disc player configured as described above, in a standby state in which no disc is inserted, the roller bracket 4 is in a forward inclined posture in which the rear end side is lifted, and the roller 5 is a guide member (not shown) by the urging force of the coil spring 6. It is elastically biased toward the lower surface of the. Further, since the tip of the drive lever 7 attached to one side of the roller bracket 4 is at a lower position in the through hole 2a, the shutter 9 is driven by the spring force of the coil spring 11 as shown in FIG. The disc insertion port 3 is held at an open position for opening.

  When an arbitrary disk is inserted into the housing 1 from the disk insertion port 3 in this standby state, the disk is held by the rotational driving force of the roller 5 after the front end of the disk is sandwiched between the lower surface of the guide member and the roller 5. It is automatically transported to the play position. During this time, since the slide member 8 moves from the retracted position to the advanced position, the roller bracket 4 is rotated immediately before the center of the disk is clamped to the turntable (not shown), and the roller 5 is separated from the lower surface of the disk. To do. When the tip of the drive lever 7 rises in the through hole 2a as the roller bracket 4 rotates, the drive arm 12 is rotated counterclockwise to bend the arm portion of the torsion spring 13. Therefore, the shutter 9 is rotated from the open position to the closed position by the spring force of the torsion spring 13, and the center portion of the disc insertion port 3 is covered by the blocking portion 9 a of the shutter 9 as shown in FIG. Is called. Therefore, even if an attempt is made to insert the second disk into the housing 1 from the center of the disk insertion port 3 in this state, the insertion of the disk is blocked by the front end of the disk coming into contact with the blocking portion 9a.

  Further, during the play operation of an arbitrary disc, the disc insertion slot located at the position where the second disc is biased toward the rotation fulcrum side of the shutter 9 with respect to the central portion of the disc insertion slot 3, that is, the left side of the blocking portion 9a. 4, the outer peripheral edge of the disk D comes into contact with a receiving portion 9 b formed on one side edge of the blocking portion 9 a, so that the shutter 9 is opened (see FIG. 4). Rotation moment M that tries to rotate in the clockwise direction (4) occurs. As a result, since the shutter 9 rotates slightly in the opening direction against the spring force of the torsion spring 13, the protrusion 9c formed on the upper end of the receiving portion 9b is locked to the upper surface side of the disk D. The movement of the shutter 9 in the opening direction is restricted, and the disk D cannot be inserted any more. When the second disc is forcibly inserted from the disc insertion port 3 located on the right side of the blocking portion 9a, the outer peripheral edge of the disc comes into contact with the other side edge of the blocking portion 9a, so that the shutter 9 In this case, the disc cannot be inserted any more because a rotational moment is generated to rotate the disc in the closing direction.

  As described above, in the erroneous insertion prevention mechanism of the disc player according to the present embodiment, the outer portion of the disc to be inserted is inserted into the blocking portion 9a of the shutter 9 that covers the central portion of the disc insertion port 3 and blocks the insertion of the disc. Since a receiving portion 9b that abuts on the periphery and applies a rotational force in the opening direction to the shutter 9 and a protrusion 9c that protrudes from the upper end of the receiving portion 9b and can be locked on the upper surface side of the disc are formed. Even if the first disc is forcibly inserted from a position deviated toward the rotation fulcrum (pin 10) side of the shutter 9 with respect to the central portion of the disc insertion slot 3, the outer peripheral edge of this disc is inserted into the receiving portion 9b. By engaging the upper surface side of the disk with the protrusion 9c in the abutted state, the movement of the shutter 9 in the opening direction can be restricted to prevent erroneous insertion of the second disk. Further, a torsion spring 13 (spring member) is interposed between the shutter 9 and the drive arm 12 so that the rotational driving force of the drive arm 12 is transmitted to the shutter 9 via the torsion spring 13. Even if there is a slight dimensional error in 9, drive arm 12, drive lever 7, etc., this dimensional error can be absorbed by the torsion spring 13.

It is a front view which shows this incorrect insertion prevention mechanism of the disc player which concerns on an Example. It is the perspective view which looked at this incorrect insertion prevention mechanism from the back side. It is operation | movement explanatory drawing of this incorrect insertion prevention mechanism. It is explanatory drawing which shows the relationship between the shutter with which this incorrect insertion prevention mechanism is equipped, and the disc inserted incorrectly. It is a perspective view which shows the principal part of this disc player. It is a perspective view which shows the principal part of the shutter drive mechanism with which this disc player is equipped. It is operation | movement explanatory drawing of this shutter drive mechanism. It is explanatory drawing which shows the conventional erroneous insertion prevention mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Front plate 2a Through-hole 3 Disc insertion port 4 Roller bracket 5 Roller 7 Drive lever 8 Slide member 9 Shutter 9a Blocking part 9b Receiving part 9c Protrusion 10 Pin (rotation fulcrum)
11 Coil spring 12 Drive arm 13 Torsion spring (spring member)

Claims (3)

A front plate having a disc insertion slot; a shutter rotatably supported by the front plate; and a drive member for rotating the shutter between a closed position and an open position. When the shutter is in the open position, the blocking portion provided on the front end side of the shutter covers a part of the disk insertion slot to prevent the insertion of the disk. In the erroneous insertion prevention mechanism of the disc player that allows disc insertion by opening
One side edge of the blocking portion serves as a receiving portion, and a protrusion is formed on the upper end of the receiving portion, so that the disc is deviated from a position biased toward the rotation fulcrum side of the shutter with respect to the central portion of the disc insertion port. When inserted, the outer peripheral edge of the disc is brought into contact with the receiving portion to give the shutter rotational force in the opening direction, and the upper surface side of the disc is locked to the protrusion. A disc player misinsertion prevention mechanism.   2. The disc player according to claim 1, wherein when the shutter is in the closed position, the receiving portion extends in a direction substantially perpendicular to the disc insertion direction in the disc insertion slot. Incorrect insertion prevention mechanism.   3. The structure according to claim 1, wherein a spring member is interposed between the shutter and the driving member, and the driving force of the driving member is transmitted to the shutter via the spring member. A disc player misinsertion prevention mechanism characterized by the above.

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