JP2006031748A - Disk player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk player which surely holds a disk, without staining both sides of the disk and is provided with a transfer means. <P>SOLUTION: The disk player comprising the means for conveying (transfer mechanism 2) the inserted disk (1) to a play-back position is provided with; roller members (transfer rollers 21L, 21R) of which the support points are located at the positions counter to the disk plane and the inclination angle to the disk plane can thereby be changed, and which can be made to abut on the outer circumferential edge part of one surface of the disk; a 1st driving means (drive motor 9) for driving to rotate the roller members and conveying the disk; a 2nd driving means (tension coil spring 32) for varying the inclination angle of the roller members, according to the positional changes of the outer circumferential edge part of the disk to be conveyed; and a guide member (guide plate 34) which makes the outer circumferential edge part of the disk abut against, and the disk player holds the outer circumferential edge part between the roller members and the guide member to convey the disk. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk reproducing apparatus, and more particularly to a reproducing apparatus including a conveying unit that automatically conveys a disk inserted from a slot opened on the front surface toward a reproducing position.

  2. Description of the Related Art Conventionally, in a compact disc playback device used for car audio or the like, a disc transport that rotates and transports rollers sandwiching both sides of the disc so that it can be stored in a limited volume called a 1DIN size. The device is generally adopted. In this conventional disk transport device, since the rollers come into contact with both surfaces of the disk, if dust or the like adheres to the roller surface, it may be transferred to the recording surface or label surface of the disk.

In order to cope with such inconvenience, the disk transport roller coated with the soft elastic synthetic resin material is formed in an inverted crown shape in which the outer diameter on the terminal side is larger than the central part in the axial direction, and the outer peripheral edge of the disk Patent Document 1 discloses a technique in which only the portion is brought into contact with the roller surface. In addition to this, Patent Document 2 discloses a technique in which the outer peripheral edge portions of both surfaces of the disk are sandwiched in the radial direction by a roller and a guide plate, and a driving force is applied only to the outer peripheral edge portion to convey the disk. ing.
Japanese Utility Model Publication No. 64-846 JP-A-8-339599

  However, according to the technique described in Patent Document 1, the soft elastic synthetic resin material coated on the roller surface is deformed by being pressed against the disk, resulting in an excessively wide contact surface of the roller with the disk. .

  Further, according to the technique described in Patent Document 2, although the transport means contacts the outer peripheral edge only to transport the disk, when the disk is ejected, the user is centered on the outer peripheral edge of the disk at a predetermined position outside the device. In order to make it possible to put the finger in the hole and take it out, it is composed of a roller made of a member having a high hardness such as metal, and the disk must be sandwiched between the roller and the guide plate with a strong pressure. For this reason, problems such as the outer peripheral edge of the disk being scraped by the roller surface and the guide surface occur. Further, in order to sandwich the outer peripheral edge of the disk from the radial direction, the roller and the guide plate must be arranged on the outer side in the radial direction of the disk, and the width of the device tends to be large, and it is accommodated in a volume of 1 DIN size. It is extremely difficult to do.

  In other words, in the prior art, it has been difficult to construct a transport means that can reliably hold both sides of the disk without fouling without increasing the storage capacity of the apparatus.

  In order to solve such problems, and to provide a disc reproducing apparatus provided with a transport means that can reliably hold both sides of the disc without fouling, without increasing the storage capacity of the device, a claim of the present invention is provided. Item 1 is a disc reproducing apparatus having a conveying means (conveying mechanism 2) to the reproduction position of the inserted disk (1) with a fulcrum placed at a position facing the plane of the disk inserted into the reproducing apparatus. The roller member (conveying rollers 21L and 21R) that can change the inclination angle with respect to the flat surface and can contact the outer peripheral edge of one of the flat surfaces of the disk, and the first drive that rotates the roller member to convey the disk Means (drive motor 9), second drive means (tensile coil spring 32) for changing the inclination angle of the roller member in accordance with a change in the position of the outer peripheral edge of the conveyed disc, And a guide member (guide plate 34) that abuts the outer peripheral edge of the other flat surface of the disc, and sandwiches and conveys the outer peripheral edge of the disc by the roller member and the guide member. did. According to a second aspect of the present invention, the second driving means comprises spring means for applying a resilient pressure contact force to the outer peripheral edge of the disk, and the third aspect provides the outer diameter of the roller member as a fulcrum. The free end side is made smaller (d1> d2) than the side.

  According to such a configuration of claim 1 of the present invention, since the roller member is inclined, only the outer peripheral edge of the disc contacts the roller surface, so that the recording surface and the label surface of the disc are not soiled. In addition, since the disc can be held at a low pressure by the roller member and the guide member, the user can easily collect the disc that is stationary at the ejection position during ejection, which is a great effect on improving usability. Can be played. In particular, according to the second aspect of the present invention, the contact force to the outer peripheral edge of the inserted disk is maintained within a predetermined range by the action of the spring means that elastically biases the outer end of the roller member upward. This is effective in stably transporting the disk following the vertical vibration of the disk and the warping of the disk. According to the second aspect of the present invention, the height dimension of the outer end of the roller member when the inclination angle is increased can be reduced, which can contribute to the downsizing of the housing.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  In the present invention, a disk insertion slot is opened in the front panel of a 1DIN size housing, and when a disk is inserted into the slot, the disk is automatically pulled to the playback position, and when an eject command is input, the disk is automatically ejected, The present invention is intended for a disk reproducing apparatus in which a disk is held in a position where a user can take it out by placing a fingertip on the outer periphery. As shown in FIG. 1, the disk reproducing apparatus includes a conveying device 2 for conveying a disk 1 inserted from a slot (not shown), a turntable 3 for placing the disk 1 during reproduction, and a disk on the turntable 3. 1 includes a clamper 4 for fixing 1 and an optical pickup 5 for reading data from the disk 1. Also, an insertion sensor 6 for detecting the insertion of the disc 1, a disc size sensor 7 for detecting whether a standard disc (diameter 12 cm) or a small-diameter disc (diameter 8 cm) has been inserted, and the disc 1 are conveyed to the reproduction position. And a photoelectric conversion switch such as a transfer completion sensor 8 for detecting this. Further, each of the transport device 2, the turntable 3, and the pickup 5 is provided with electric motors 9, 10, and 11 as drive sources. These sensors 4, 5, 6 and motors 9, 10, 11 are connected to the control device 12.

  The control device 12 includes a CPU, a memory, a DA converter, various interface circuits, and the like, and displays an operation unit 13 for inputting commands for reproducing, stopping, and ejecting the disk 1 and information on the disk 1. A display unit 14 composed of a liquid crystal or LED is connected to a low frequency amplifier 15 that amplifies a low frequency signal converted from a recording signal read from the disk 1. A speaker 16 as a sound source is connected to the low frequency amplifier 15.

  As shown in FIGS. 2 to 4, the disk transport device 2 is installed at the foremost portion of the housing 17, and includes a power transmission mechanism 18 including a plurality of gears for transmitting the driving force of the driving motor 9, A driven gear 20 supported by the gear box 19 and a pair of conveying rollers 21L and 21R connected to the left and right ends of the driven gear 20 are provided.

  The both ends of the center shafts 22L and 22R are connected to the left and right ends of the driven gear 20 through ball joints to be described later. The transport rollers 21L and 21R are respectively connected by roller holders 24L and 24R having pin shafts 23L and 23R coaxial with the tilting centers of the transport rollers 21L and 21R and the inner ends thereof connected to the left and right ends of the gear box 19, respectively. It is supported. As a result, both the transport rollers 21L and 21R and the roller holders 24L and 24R can be tilted only on the vertical plane. The outer surfaces of the transport rollers 21L and 21R are covered with a soft elastic synthetic resin material such as silicon rubber or fluororubber so as not to scrape off burrs on the outer peripheral edge of the disk.

  In a position adjacent to the front side of the roller holders 24 </ b> L and 24 </ b> R in the housing 17, a pair of left and right lifting guide blocks 25 </ b> L and 25 </ b> R are engaged with locking pins 26 </ b> L and 26 </ b> R fixed to the bottom wall of the housing 17. It is regulated by the slits 27L and 27R and is slidable only in the left-right direction. Racks 29L and 29R that mesh with the pinion 28 disposed in the center are formed at opposite ends of the pair of elevating guide blocks 25L and 25R, whereby the pair of elevating guide blocks 25L and 25R is formed. However, it slides in synchronization in the left-right direction.

  On the outer end side of the vertical walls of both the lifting guide blocks 25L and 25R, slits 30L and 30R whose outer sides are inclined upward are formed (FIG. 3), and pins 31L and 31R engaged with the slits 30L and 30R are formed. The outer end sides of the roller holders 24L and 24R are connected to the lifting guide blocks 25L and 25R through the. As a result, the inclination angles of the transport rollers 21L and 21R change steplessly as the elevating guide blocks 25L and 25R move in the left-right direction.

  A tension coil spring 32 is stretched between the left and right lifting guide blocks 25L and 25R (see FIG. 2 and omitted in other figures). The lift guide blocks 25L and 25R are pulled toward each other, and as a result, the outer ends of the transport rollers 21L and 21R rise together with the roller holders 24L and 24R, and both the transport rollers 21L and 21R tilt the outer ends upward. It is made to wait in the initial position (state of FIG. 3). Further, since the left and right transport rollers 21L and 21R abut against the outer peripheral edge of the disk 1 independently by the elastic force of the spring 32, the transport rollers 21L and 21R are caused by the displacement of the disk 1 and the warp of the disk 1 during the transport. Follow-up can be carried well.

  Above the transport rollers 21L and 21R, there is provided a guide plate 34 having tapered surfaces 33L and 33R formed on its lower surface so that only the outer peripheral edge of the disk 1 is in sliding contact with each other. The outer peripheral edge of the disk 1 is sandwiched between the outer peripheral surfaces of the transport rollers 21L and 21R and the tapered surfaces 33L and 33R. The left and right ends of the tapered surfaces 33L and 33R of the guide plate 34 are formed with recesses 35L and 35R that can receive the outer ends of the conveying rollers 21L and 21R at the maximum inclined initial position, respectively. The height dimension of 2 is suppressed. The sliding surface of the guide plate 34 with the disk 1 is not limited to the tapered surfaces 33L and 33R shown in the present embodiment as long as only the outer peripheral edge of the disk 1 can be slidably contacted. Alternatively, other shapes may be used.

  The pinion 28 that synchronizes the pair of lifting guide blocks 25L and 25R and the drive motor 9 are connected by a power transmission mechanism with a switching device (not shown), and the drive motor 9 forcibly drives the pinion 28. Thus, the left and right lifting guide blocks 25L and 25R can be moved away from each other against the urging force of the tension coil spring 32. Thereby, the inclination angle of the transport rollers 21L and 21R can be forcibly decreased.

  As shown in FIGS. 5 and 6, balls 36 </ b> L and 36 </ b> R provided at opposite ends of the central shafts 22 </ b> L and 22 </ b> R and the driven gear 20 are connected to the connecting portions of the left and right transport rollers 21 </ b> L and 21 </ b> R with the driven gear 20. Ball joints 38L and 38R comprising ball holders 37L and 37R integrally formed on the left and right ends are provided. The ball holders 37L and 37R are formed with slits 39L and 39R along the axial direction, and the projecting ends of the pins 40L and 40R penetrating the balls 36L and 36R are engaged with the slits 39L and 39R. Due to the mutual engagement between the slits 39L and 39R and the pins 40L and 40R, the rotational force applied to the driven gear 20 from the drive motor 9 is transmitted to the transport rollers 21L and 21R, and the pins 40L and 40R pass through the slits 39L and 39R. Is allowed to tilt the conveying rollers 21L and 21R.

  When the disc 1 is inserted into the disc transport mechanism 2 configured as described above, the outer peripheral surface of the transport roller 21L (21R) having the maximum inclination angle and the taper surfaces 33L and 33R of the guide plate 34, as indicated by imaginary lines in FIG. The outer peripheral edge of the arc portion in the forward direction of the disc 1 is sandwiched between the two. When the transport rollers 21L and 21R are driven to rotate in this state, the rotation is guided to the tapered surfaces 33L and 33R of the guide plate 34, and the disk 1 is drawn (see FIG. 8). At this time, the transport rollers 21L and 21R tilt between θ1 and θ2 from the initial position indicated by the imaginary line in FIG. 7 until the maximum diameter portion of the disk 1 indicated by the solid line passes. The pressure contact force acting on the outer peripheral edge of the disk 1 during the tilting motion of the transport rollers 21L and 21R is given by the contraction force of the tension coil spring 32.

  When the disk 1 reaches the reproduction position (the position of the turntable 3), the elevation guide blocks 25L and 25R are forcibly driven and separated from each other, thereby reducing the inclination angle of the transport rollers 21L and 21R. 3, the disk 1 is placed, and as shown in FIG. 9, the transport rollers 21L and 21R are held in the horizontal position. As a result, the disc 1 and the transport rollers 21L and 21R are separated from each other by a sufficient distance, so that interference with the transport rollers 21L and 21R can be avoided even if the disc 1 vibrates up and down during reproduction.

  As shown in an exaggerated manner in FIG. 10, the conveying rollers 21L and 21R have a relatively large diameter (dl) on the inner end side of the portion where the outer peripheral edge of the disk 1 is in sliding contact, and a relatively small diameter on the outer end side. It is formed in a tapered shape forming (d2). The function of transporting the disk 1 is established without such a taper. However, by providing the taper, the height dimension of the housing 2 can be reduced as compared with the case without the taper. Yes (h2> hl).

  Next, control of the disc playback apparatus to which the present invention is applied will be described with reference to FIG.

  Whether or not the disc 1 has been inserted is determined by the insertion sensor 6 (step 1). If the insertion of the disc 1 is detected, the drive motor 9 is activated to start transporting the disc 1 to the reproduction position (step 1). Step 2). The disc size sensor 7 confirms whether the disc 1 transported here is 12 cm size or 8 cm size (step 3). If 2 cm size is detected, the disc 1 is placed on the turntable 3. That is, it is determined by the conveyance completion sensor 8 whether or not the reproduction position has been reached (step 4), and the conveyance rollers 21L and 21R are continuously driven until the arrival of the disk 1 at the reproduction position is detected.

  If it is detected that the disk 1 has reached the reproduction position, the power transmission path of the drive motor 9 is switched to move the elevating guide blocks 25L and 25R away from each other left and right so that the transport rollers 21L and 21R interfere with the disk 1. Retreat to a position where it will not be performed (step 5). When the retracting of the transport rollers 21L and 21R is completed, the power transmission path of the drive motor 9 is switched to operate the clamper 4, and the disk 1 is fixed on the turntable 3 (step 6).

  Thereafter, the reproduction of the disk is started based on the reproduction command.

  It is determined whether or not an eject command for the disk 1 has been issued (step 7). If an eject command has been issued, the drive motor 9 is activated to move the clamper 4 away from the turntable 3 (step 8).

  Next, the power transmission path of the drive motor 9 is switched to tilt the transport rollers 21L and 21R to contact the outer peripheral edge of the disk 1 (step 9). Further, the power transmission path of the drive motor 9 is switched to reversely drive the transport rollers 21L and 21R, and the ejection of the disk 1 is started (step 10).

  Whether or not the disk 1 has reached the insertion position is determined by the insertion sensor 6 (step 11). If it is detected that the disk 1 has reached the insertion position, the driving of the transport rollers 21L and 21R is stopped and the transport is performed. The disk 1 is held between the rollers 21L and 21R and the guide plate 34, and is put on standby (step 12). In this state, the user can collect the ejected disc 1.

  It is determined whether or not a predetermined time has elapsed since the disk 1 was held in the insertion slot (step 13). When the predetermined time has not elapsed, the insertion sensor 6 confirms the presence or absence of the disk 1 (step 14).

  If it is detected by this series of processes that the user has collected the disk 1, the series of control flow is terminated, and if it is determined that the user has not collected the disk 1, the process proceeds to Step 2. Then, the disc 1 is conveyed again to the reproduction position to prevent the recording surface from being damaged due to the fall of the disc 1.

  On the other hand, if an 8 cm disk is detected in step 3, the drive motor 9 is reversed to reverse the transport rollers 21L and 21R, and the disk is ejected to the insertion slot side (step 15). Then, it is determined whether or not the 8 cm size disc has been discharged to the insertion slot by the insertion sensor 6 (step 16). If it is determined that the discharge has been completed, the conveying rollers 21L and 21R are stopped and the user removes the 8 cm size disc. It is held near the insertion port so that it can be collected (step 17).

  This control flow is not limited to the routine shown in FIG. 11, and each step may be appropriately replaced. If the disc 1 is not collected even after a predetermined time has elapsed, the disc 1 may be held near the insertion slot until the user collects it without being transported to the reproduction position again. Furthermore, the specification is not limited to the reproduction of 8 cm discs, and if there is a margin in the capacity of the device, the tilting range of the transport rollers 21L and 21R can be expanded to accommodate 8 cm discs.

  FIG. 12 shows another embodiment of the disk transport device according to the present invention. In this embodiment, instead of the right transport roller 21R and the tapered surface 33R, a drum-shaped support roller 41 is disposed on the right side, and the support roller 41 is moved up, down, left, and right in synchronization with the transport position change of the disk 1. Thus, the outer peripheral edge on the right side of the disk 1 is held.

  FIG. 13 shows still another embodiment of the disk transport device according to the present invention. In this embodiment, a pair of inclined driven rollers 42L and 42R are arranged in place of the guide plate 34, and the outer peripheral edge of the disk 1 is sandwiched between the driven rollers 42L and 42R and the conveying rollers 21L and 21R. It is a thing.

It is a block diagram which shows the whole structure of this invention apparatus. (Example 1) which is a top view of the conveying apparatus by this invention. It is a front view which shows the initial state of the conveying apparatus by this invention. It is a perspective view of the conveying apparatus by this invention. It is sectional drawing of the center joint of the conveying apparatus by this invention. It is sectional drawing of the center joint of the conveying apparatus by this invention. It is explanatory drawing of the operating point. It is a front view which shows a mode when the largest diameter part of the disk in the middle of conveyance passes. It is a front view which shows the mode of the conveyance roller at the time of reproduction | regeneration. It is explanatory drawing which shows the reason which makes a roller a taper. It is a flowchart of control. It is a principal part front view of another Example (Example 2). It is a principal part front view of another Example (Example 3).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc 2 Conveyance apparatus 9 Drive motor 17 Housing | casing 20 Driven gear 21L * 21R Conveyance roller 25L * 25R Lifting guide block 30L * 30R Inclination slit 32 Pulling coil spring 33L * 33R Tapered surface 34 Guide board 35L * 35R Recess 41 Support roller 42 Followed roller

Claims (3)

A disc playback apparatus having means for transporting the inserted disc to the playback position,
A roller member capable of changing an inclination angle with respect to the flat surface of the disk with a fulcrum at a position facing the flat surface of the disk inserted in the reproducing apparatus and capable of contacting an outer peripheral edge of one flat surface of the disk When,
First driving means for rotating the roller member to convey the disk;
Second driving means for changing an inclination angle of the roller member in accordance with a change in position of an outer peripheral edge of the disc being conveyed;
And a guide member that abuts the outer peripheral edge of the other flat surface of the disk. The disk reproducing apparatus sandwiches and conveys the outer peripheral edge of the disk by the roller member and the guide member. .   2. The disk reproducing apparatus according to claim 1, wherein the second driving means comprises spring means for applying a resilient pressure contact force to the outer peripheral edge of the disk.   3. The disk reproducing apparatus according to claim 1, wherein the roller member has an outer diameter dimension smaller on the free end side than on the fulcrum side.

Images