JP2007102895A - Disk transporting mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk transporting mechanism in which fault caused by erroneous insertion of dual-piled disks can be prevented surely. <P>SOLUTION: Descending quantities in which both drive rollers 4, 5 are descended from a guide member 2 and separated are regulated respectively by adopting a twin roller transporting automatically a disk holding between first and second rollers 4, 5 arranged parallel in the insertion direction of disk and the guide member 2, and piercing shafts 4a, 5a of these both drive rollers 4, 5 into corresponding cam holes 10a, 10b of a slide plate 10, while descending regulation quantity of the second drive roller 5 is set to smaller than descending regulation quantity of the first drive roller 4. Thereby, when a user inserts erroneously dual-piled disks D1, D2, one disk D2 is blocked at this side of the second drive roller 5 having small descending regulation quantity, and erroneous insertion of the dual-piled disks D1, D2 can be prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disk transport mechanism for automatically transporting a disk such as a CD or DVD sandwiched between a guide member between an eject position and a play position by rotational driving of a drive roller.

  In general, in an in-vehicle disc player, a guide member fixed to an upper end portion of a chassis having a disc insertion slot, a roller bracket biased in a direction approaching the lower surface of the guide member, and rotatable to the roller bracket And a rubber drive roller supported by the disc. The drive roller is driven to rotate in both forward and reverse directions using a motor as a drive source so that the disc sandwiched between the guide member and the drive roller is ejected and played. Slot-in type disk transport mechanisms that are automatically transported between them are widely adopted. In a disc player using such a disc transport mechanism, if a user accidentally inserts two stacked discs into the chassis from the disc insertion slot, either one of the two inserted discs or There is a risk that both of them may become untransportable in the chassis, in which case it becomes a fatal problem that the disk cannot be taken out unless the device is disassembled.

Therefore, conventionally, a roller restricting member elastically biased in a direction close to the plate surface of the guide member is provided, and the shaft portion of the drive roller and the roller are utilized by utilizing the thickness of the disk inserted between the drive roller and the guide member. There has been proposed a disk transport mechanism that can prevent insertion of two stacked disks by selectively abutting against a regulating member (see, for example, Patent Document 1). In such a disk transport mechanism, when a single disk is inserted between the drive roller and the guide member, the disk is automatically transported to the play position by the rotational driving force of the drive roller, but between the drive roller and the guide member. When the two stacked discs are inserted, the driving roller largely separates from the guide member due to the thickness of the two discs and comes into contact with the roller regulating member. A load is applied in the direction in which the disc is pressed against the guide member, and movement of the disc in the automatic conveyance direction is restricted.
Japanese Patent Laying-Open No. 2005-18889 (pages 15-17, FIG. 14)

  In the conventional disk transport mechanism described above, the driving roller is supported so as to be movable toward and away from the guide member, and the insertion space between the driving roller and the guide member is reduced by the thickness of the two disks by the roller regulating member. Since the two stacked disks are positioned in the thickness direction between the drive roller and the guide member, the two stacked disks are mistakenly inserted into the chassis. Can be prevented. However, it is unnatural for the user that the disk he / she intends to insert is stopped at the disk insertion slot and not automatically conveyed into the chassis, and the user can force the stacked disk into the chassis from the stop position. In such a case, the two stacked disks forcibly expand the insertion space between the drive roller and the guide member and enter the chassis at the same time, and the disk cannot be taken out even if the drive roller is reversed. appear.

  The present invention has been made in view of such a state of the art, and an object of the present invention is to provide a disc transport mechanism that can reliably prevent a failure caused by erroneous insertion of two stacked discs. .

  The present invention employs a twin roller in which a disk is sandwiched between a pair of drive rollers and a guide member to automatically convey the disc, and the amount of separation movement that allows both of these drive rollers to move away from the guide member. The amount of separation movement of the far side driving roller disposed at a position far from the disc insertion slot is set to be smaller than the amount of separation movement of the front side driving roller.

  The disc transport mechanism according to the present invention employs a twin roller in which a disc is sandwiched between the first and second drive rollers arranged side by side in the disc insertion direction and the guide member to automatically transport the disc. The separation movement amount by which the roller can move in the direction away from the guide member is regulated, and the separation movement amount of the second driving roller disposed on the far side far from the disc insertion opening is separated from the first driving roller on the near side. Since it is set smaller than the moving amount, even if the user accidentally inserts two stacked discs, one of the discs is blocked on the front side of the second driving roller having a small moving distance and inserted into the inside. Therefore, it is possible to reliably prevent a failure caused by erroneous insertion of two stacked disks.

  The disk transport mechanism of the present invention includes a guide member disposed on the back side of the disk insertion slot, a first drive roller disposed so as to be close to and away from the guide member, and the first drive roller. A second driving roller that is disposed so as to be close to and away from the guide member at a deeper position than the guide member, and a separation movement amount of the first and second driving rollers in the separation direction from the guide member. And a regulating means for regulating each of the second driving roller and the second driving roller so that a separation movement amount of the second driving roller is set smaller than a separation movement amount of the first driving roller.

  According to the disk transport mechanism configured as described above, when a user erroneously inserts two stacked disks between the guide member and the first drive roller, both the disks are driven in the first drive on the front side. The roller and the second driving roller on the rear stage side are regulated in two stages in the thickness direction, but the separation movement amount of the second driving roller is set smaller than the separation movement amount of the first driving roller. Therefore, one of the two stacked disks is blocked on the front side of the second drive roller. Therefore, both the disks can be discharged to the outside by reversing the first and second driving rollers, and it is possible to reliably prevent the two stacked disks from being erroneously inserted at the same time and being unable to be discharged. In addition, since a twin roller is used in which the disk is automatically transported by sandwiching the disk between the first and second driving rollers arranged in parallel in the disk insertion direction and the guide member, the first and second driving Even if the diameter of the roller is reduced, the disc can be automatically and reliably transported, and the disc transport mechanism can be made thinner.

  In the above configuration, the first and second driving rollers may be moved closer to and away from the guide member using mechanisms independent of each other, but the rotating arm biased in the direction closer to the guide member And a roller bracket rotatably supported by the rotating arm, and the first and second drive rollers are pivotally supported by the respective portions opposed to each other via the swing center of the roller bracket. It is preferable that the first and second driving rollers can be moved close to and away from the guide member using a common rotating arm and roller bracket.

  Further, in the above configuration, the restricting means includes the rotation shafts of the first and second drive rollers and the first and second openings through which the rotation shafts are inserted, and the rotation shaft of the first drive roller. If the clearance defined between the rotary shaft of the second drive roller and the second opening is set to be smaller than the clearance defined between the first opening and the first opening, the regulation is different in the amount of separation movement with a simple configuration. It is preferable to realize the means.

  Embodiments will be described with reference to the drawings. FIG. 1 is a plan view of a disk transport mechanism according to an embodiment of the present invention, FIG. 2 is a side view of the disk transport mechanism, and FIG. FIG. 4 is a perspective view of the disk transport mechanism as viewed from the other direction, FIG. 5 is an exploded perspective view of the disk transport mechanism, and FIG. 6 is a diagram in which two stacked disks are inserted into the disk transport mechanism. FIG. 7 is a diagram for explaining the operation of the disk transport mechanism.

  1 and 2, reference numeral 1 (indicated by a two-dot chain line) is a box-shaped casing that forms the outer shell of the disk player, and a horizontally long disk insertion slot 1a is formed on the front side of the casing 1. Is formed. Note that the front side of the housing 1 is covered by a nose member (front panel) (not shown) exposed to an instrument panel or the like in the vehicle, and the disc insertion slot 1a faces the disc insertion opening provided in the nose member. is doing.

  A drive chassis (not shown) is elastically supported inside the housing 1 via a damper or the like. The drive chassis supports a guide member 2 and a base member 3, and is composed of a turntable and a clamper. And an optical pickup for recording and / or reproducing information with respect to the disk D are mounted. The first and second drive rollers 4 and 5 are disposed opposite to each other below the guide member 2, and the guide member 2 and the first and second drive rollers 4 and 5 are located on the back side of the disk insertion slot 1a. Is arranged. The first and second drive rollers 4 and 5 are configured by inserting hollow rubber into shafts 4a and 5a which are rotating shafts, and the diameter of the hollow rubber gradually increases from the center side in the longitudinal direction toward both outer sides. It is formed in a tapered shape that increases. Both end portions of these shafts 4a and 5a are rotatably supported by support portions 6a provided on the left and right sides of the roller bracket 6, and both support portions 6a are connected by a plate-like bridge portion 6b. A pin 6c is implanted in the support portion 6a at an upper central position that equalizes the distances to the shafts 4a and 5a. By inserting the pin 6c into the through-hole 7b at the tip of the rotating arm 7, The roller bracket 6 is swingably supported by the rotating arm 7 with the pin 6c as a swing center. The rear end portion of the rotating arm 7 is rotatably supported by the base member 3 via the shaft portion 7a, and the distal end portion of the rotating arm 7 is brought close to the lower surface of the guide member 2 by a spring member (not shown). It is elastically biased in the direction of

  A motor 8 is mounted on the base member 3, and the first and second drive rollers 4 and 5 are rotationally driven in both forward and reverse directions using the motor 8 as a drive source. At that time, of the reduction gear train 9 interposed between the motor 8 and the first and second drive rollers 4, 5, it is fixed to the shafts 4 a, 5 a of the first and second drive rollers 4, 5. Since the relay gear 9c is interposed between the two gears 9a and 9b, the first and second drive rollers 4 and 5 rotate in the same direction (see FIG. 4).

  Further, slide plates 10 are arranged on both the left and right sides of the base member 3 so as to be movable in the front-rear direction (X1-X2 direction). The slide plate 10 is moved forward and backward using another motor (not shown) as a drive source. As a result, the first and second drive rollers 4 and 5 are driven toward and away from the guide member 2, and the drive chassis described above is locked / unlocked with respect to the housing 1. Yes. The slide plate 10 is provided with first and second cam holes 10a and 10b. The shaft 4a of the first drive roller 4 is inserted into the first cam hole 10a, and the second drive roller 5 The shaft 5a is inserted through the second cam hole 10b. Here, the upper ends of the first and second cam holes 10a, 10b are openings sufficiently larger than the diameters of the shafts 4a, 5a, and the shafts 4a, 5a are within the upper ends of the corresponding cam holes 10a, 10b. The first and second drive rollers 4 and 5 can move up and down by a clearance (dimension difference) between the shafts 4a and 5a and the cam holes 10a and 10b. However, the first and second cam holes 10a and 10b have different upper end openings, and the lower end of the upper end opening in the second cam hole 10b is different from the lower end of the upper end opening in the first cam hole 10a. Is set at the upper position, so that the clearance that allows the shaft 5a to move up and down in the second cam hole 10b is smaller than the clearance that allows the shaft 4a to move up and down in the first cam hole 10a. Has been. That is, the shafts 4a, 5a and the cam holes 10a, 10b constitute restriction means for restricting the descending amount of the first and second drive rollers 4, 5 from the guide member 2. In the case of this embodiment, With respect to the thickness of one disk D (about 1.2 mm), the lowering restriction amount on the shaft 4a side of the first drive roller 4 is 1.7 to 2.0 mm, and the shaft 5a of the second drive roller 5 is. The lowering regulation amount on the side is set to 1.5 mm.

  In the disk transport mechanism configured as described above, when the disk D is in an ejected state (standby state) in which the disk D is not loaded in the housing 1, the drive chassis described above is locked with respect to the housing 1. As shown in FIG. 2, the slide plate 10 moves in the direction of the arrow X2 and is in the retracted position, and both shafts 4a and 5a are in the upper ends of the corresponding cam holes 10a and 10b. In this case, since the roller bracket 6 receives a biasing force in the direction approaching the lower surface of the guide member 2 from the rotating arm 7, the shafts 4a and 5a are respectively connected to the first and second cam holes 10a and 10b. The first and second drive rollers 4 and 5 are in contact with the upper end of the upper end opening and are in contact with the lower surface of the guide member 2 or are opposed to each other with a slight gap.

  In this ejected state, when the user inserts one disk D into the housing 1 from the disk insertion slot 1a, the motor 8 starts to rotate in one direction by detecting the insertion of the disk D by a detection sensor (not shown), Using the motor 8 as a drive source, the first and second drive rollers 4 and 5 are rotationally driven in the forward direction. When the disk D is further inserted into the inside of the housing 1 (in the direction of the arrow X2), as shown in FIG. 7A, the leading end in the insertion direction of the disk D is the guide member 2 and the first and second drive rollers 4. The disc D is automatically conveyed from the eject position to the play position in response to the rotational driving force of the first and second drive rollers 4 and 5. At that time, the first and second drive rollers 4 and 5 are separated from the lower surface of the guide member 2 by the thickness corresponding to the thickness of the inserted one disk D, and the cam holes 10a corresponding to the shafts 4a and 5a are associated therewith. , 10b. Note that the amount of restriction for lowering the shaft 4a of the first drive roller 4 is set sufficiently larger than the thickness of the disk D, so that the disk D collides with the first drive roller 4 when the user inserts the disk D. Such a feeling does not occur, and the insertion feeling is improved.

  When the disk D is automatically conveyed to the play position and chucked on a turntable (not shown), the slide plate 10 moves forward in the direction of the arrow X1 from the retracted position, so that the drive chassis moves relative to the housing 1. Switch from the locked state to the unlocked state. Further, as the slide plate 10 moves forward, the shafts 4a and 5a go from the upper end portions of the corresponding cam holes 10a and 10b to the lower end portion through the inclined portions, so that the first and second drive rollers 4 and 5 are guided. A space that does not hinder the rotation of the disk D is ensured between the guide member 2 and the first and second drive rollers 4 and 5, greatly separated from the lower surface of the member 2. When a spindle motor (not shown) is driven to rotate in this state, the turntable, the disk D, and the clamper rotate integrally, and information is recorded and / or reproduced on the disk D by the optical pickup. When ejecting the disc D for which a play operation such as reproduction has been completed, the slide plate 10 is retracted in the direction of the arrow X2 and the motor 8 is rotated in the other direction to perform the reverse operation to the above. Is automatically conveyed from the play position to the eject position, so that the disk D can be taken out of the housing 1 from the disk insertion slot 1a.

  Next, a case will be described in which a user erroneously inserts two stacked disks D into the housing 1 from the disk insertion slot 1a. In this case, when the leading end portion in the insertion direction of the two stacked disks (the upper side is called the disk D1 and the lower side is called the disk D2) enters between the guide member 2 and the first drive roller 4 and is sandwiched between them. Since the first drive roller 4 is separated from the lower surface of the guide member 2 by an amount corresponding to the thickness of the two disks D1 and D2, the shaft 4a of the first drive roller 4 is the first one as shown in FIG. The cam hole 10a of the first cam hole 10a descends and contacts the lower end. Here, since the lowering restriction amount of the shaft 4a is set to a value (1.7 to 2.0 mm) slightly smaller than the thickness (about 2.4 mm) of the two disks D1 and D2, the two disks D <b> 1 and D <b> 2 are inserted up to the front of the second drive roller 5 in a state regulated in the thickness direction by the guide member 2 and the first drive roller 4. However, since the lowering restriction amount by which the shaft 5a of the second driving roller 5 can descend within the upper end opening of the second cam hole 10b is set to a value (1.5 mm) of about one disk, The disk D1 can enter between the guide member 2 and the second drive roller 5, but the lower disk D2 is blocked by the second drive roller 5 and is not automatically conveyed (see FIG. 6). Therefore, if it is detected that this state has continued for a predetermined time and the motor 8 is rotated in the other direction, the first and second drive rollers 4 and 5 are rotated in the reverse direction so that both the disks D1 and D2 are attached to the housing 1. Can be taken out. Alternatively, in a state where the lower disk D2 is blocked by the second drive roller 5, only the upper disk D1 is sandwiched between the second drive roller 5 and the guide member 2 and pulled back, and this disk D1 The transfer operation may be completed.

  As described above, the disk transport mechanism according to the present embodiment employs a twin roller in which the disk D is sandwiched between the guide member 2 and the first and second drive rollers 4 and 5 and is automatically transported. Even if the diameters of the first and second drive rollers 4 and 5 are reduced, the disk D can be automatically conveyed reliably, and the entire disk player including the disk conveying mechanism can be reduced in thickness. Then, the first and second drive rollers 4 and 5 regulate the amount of descending in the direction away from the guide member 2, respectively, and are far from the first drive roller 4 disposed on the near side in the disc insertion direction. Since the lowering restriction amount of the second driving roller 5 arranged on the side is set small, even if the user erroneously inserts the two stacked disks D1 and D2, one disk D2 is inserted into the second driving roller. Block with 5 to prevent further insertion. Therefore, by rotating the first and second drive rollers 4 and 5 in the reverse direction, both the disks D1 and D2 can be discharged to the outside, and the two stacked disks D1 and D2 are erroneously inserted at the same time and cannot be discharged. Can be surely prevented.

  Further, the first and second drive rollers are provided in the first and second cam holes 10a and 10b formed in the slide plate 10 as a restricting means for restricting the descending amount of the first and second drive rollers 4 and 5. Since the shafts 4a and 5a of 4 and 5 are inserted and the clearances that allow the shafts 4a and 5a to move up and down in the corresponding openings of the cam holes 10a and 10b are made different, the configuration of the regulating means is simplified. can do. Further, the first and second driving rollers 4 and 5 are rotatably supported on the roller bracket 6, and the roller bracket 6 is swingably supported on the rotating arm 7, and the rotating arm 7 is guided. Since it is configured to be elastically biased in the direction approaching the lower surface of the member 2, the first drive is performed when the two disks D 1 and D 2 are inserted between the guide member 2 and the first drive roller 4. When the roller bracket 6 swings as the roller 4 descends, a biasing force is applied to the second drive roller 5 in the direction of approaching the lower surface of the guide member 2, and one disk D2 is moved to the second drive roller. 5 can block reliably.

It is a top view of the disc conveyance mechanism based on the Example of this invention. It is a side view of the disk transport mechanism. It is the perspective view which looked at this disc conveyance mechanism from one direction. It is the perspective view which looked at this disk conveyance mechanism from the other direction. It is a disassembled perspective view of this disk conveyance mechanism. It is a top view which shows the state in which the disk piled up by 2 sheets was inserted in this disk conveyance mechanism. It is operation | movement explanatory drawing of this disk conveyance mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 1a Disk insertion slot 2 Guide member 3 Base member 4 1st drive roller 5 2nd drive roller 4a, 5a Shaft (rotary shaft)
6 Roller bracket 6a Pin 7 Rotating arm 8 Motor 10 Slide plate 10a First cam hole (first opening)
10b Second cam hole (second opening)
D, D1, D2 disc

Claims (3)

  A guide member disposed on the back side of the disc insertion slot, a first drive roller disposed so as to face and separate from the guide member, and the guide at a position behind the first drive roller. A second drive roller disposed opposite to the member so as to be able to approach and separate from the member; and a regulation unit that regulates a separation movement amount of the first and second drive rollers in the separation direction from the guide member. The disc transport mechanism is characterized in that the amount of separation movement of the second drive roller is set smaller than the amount of separation movement of the first drive roller.   2. The first and second drives according to claim 1, comprising: a turning arm biased in a direction approaching the guide member; and a roller bracket supported swingably on the turning arm. A disk transport mechanism, characterized in that a roller is rotatably supported at a portion facing each other via a swing center of the roller bracket. 3. The control device according to claim 1, wherein the restricting means includes a rotation shaft of the first and second drive rollers and first and second openings through which the rotation shafts are inserted. The clearance defined between the rotation shaft of the second drive roller and the second opening is set smaller than the clearance defined between the rotation shaft of the drive roller and the first opening. A disc transport mechanism.

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