JP4453544B2 - Disk unit - Google Patents

Description

  The present invention relates to a disk device, and more particularly to a disk device in which measures are taken to reduce a collision sound when a disk tray pulled out of an enclosure stops.

  In a disk device such as a DVD player, a disk is carried into an enclosure as a chassis on which an element such as an optical pickup necessary for recording / reproduction processing on a disk recording surface is mounted between the inside and the outside of the enclosure. The disc tray is slidably attached, and is provided with a retreat position restricting means for restricting the retreat position of the disc tray drawn out of the enclosure.

  Conventionally, there has been one that employs an electrical control method as the backward position restricting means. In this case, the switch detects that the disk tray has been pulled out to the position immediately before the retracted position, and the rotation of the motor as a drive source for retracting the disk tray is stopped by the detection signal. In addition, in this case, in order to prevent a situation in which the disc tray is further pulled out from an appropriate retracted position, there is also a safety measure in which an engaging claw provided on the disc tray is locked to a receiving piece provided on the enclosure. Was taken.

  On the other hand, it has been attempted to omit the switch by adopting only a mechanically operated stopper mechanism instead of employing the electrical control method as described above as the backward position restricting means. The main part of the stopper mechanism A is shown in a schematic plan view in FIG.

  The stopper mechanism A shown in FIG. 1 includes a receiving surface 21 of a receiving piece 2 provided on the enclosure 1 and a contact surface 41 of an engaging claw 4 provided on the disc tray 3 side. In the disk device employing this stopper mechanism A, when the disk tray 3 is pulled out in the backward direction a by the rotation of the motor as a driving source, the contact surface 41 of the engaging claw 4 is brought into contact with the receiving surface 21 of the receiving piece 2. By engaging, the backward movement of the disk tray 3 is stopped, the backward position of the disk tray 3 is regulated, and then the rotation of the motor is stopped through a predetermined control process. In FIG. 4, reference numeral 5 denotes a pinion rack mechanism, a pinion 51 is attached to a fixed position of the enclosure 1, and a rack 55 is provided on the back surface of the disk tray 3.

  On the other hand, conventionally, a disk device having a function of absorbing an impact when the tray is closed has been proposed (see, for example, Patent Document 1). A technique is also known in which the rack gear is elastically pressed from its back portion in order to smoothly mesh the rack gear and the operating gear (see, for example, Patent Document 2).

Among these, what is described in Patent Document 1 is a disk device such as a disk autochanger that selects and reproduces an arbitrary compact disk from a plurality of compact disks when the tray collides with the mechanical chassis when closed. In order to reduce the impact, a cushion material made of rubber is attached to the rear end of the mechanical chassis, or instead of the cushion material, an elastically deformable cushion portion is provided on the upper surface of the main gear that determines the movement timing of the tray. The abutting portion of the lower surface pushes the cushion portion and elastically deforms it. Further, this Patent Document 1 describes that a main gear is molded with a polyacetal resin as an elastically deformable resin.
JP 7-272373 A JP-A-8-17168

  By the way, in the case where the above-described electrical control method is adopted as the backward position restricting means, the disk tray can be stopped at the backward position without causing a collision between members, so that a collision sound between the members becomes a problem. There are few things. Moreover, even if the disc tray-side engaging claw provided as a safety measure collides with the enclosure-side receiving piece, the collision occurs when the disc tray is decelerated. Is extremely low and its impact noise and impact are rarely a problem.

  However, in the case where the stopper mechanism A described with reference to FIG. 4 is used, the contact surface 41 of the engaging claw 4 collides with the receiving surface 21 of the receiving piece 2 without the disk tray 3 decelerating in advance, so that the disk tray 3 Since it stops at the retreat position, the collision sound becomes louder and the impact at the time of the collision becomes larger, and the collision sound and impact may become a problem in the operation quality of the disk device itself.

  In this regard, the above-mentioned Patent Document 1 is merely a technique for reducing the impact when the tray is closed. The problem is the impact sound and impact when the disc tray 3 described in FIG. It is not what you have. Moreover, since patent document 1 is what makes a part of tray collide with the cushioning material which consists of rubber | gum, or the cushion part which can be elastically deformed, tray is returned by the return operation | movement to the original shape of the cushioning material or cushion part after a collision. Is pushed back, and it is considered difficult to accurately define the tray closing position.

  In the present invention, in view of the above situation, by devising the pinion rack mechanism 5 described in FIG. 4, the collision noise between members when the disk tray reaches the retracted position (open position) is greatly reduced. Moreover, an object of the present invention is to provide a disk device that can accurately define the retracted position of the disk tray.

A disk device according to the present invention includes a disk tray that is slidably attached to an enclosure and that moves in and out of the enclosure to carry in and out the disk. And a pinion rack mechanism comprising a pinion provided on the enclosure and a rack provided on the disk tray, and restricts the retracted position of the disk tray drawn out of the enclosure. A stopper mechanism is provided, and the stopper mechanism is provided on one side of the enclosure and the disk tray, and provided on the other side to engage with the receiving surface, thereby restricting the retracted position of the disk tray. It has a contact surface. When the contact surface moves to a position immediately before reaching the engagement position with the receiving surface by the retreating operation of the disc tray, the rotation of the pinion is stopped by engaging with the meshing teeth of the pinion. Thus, by adding pinion locking means for stopping the rack feeding action by the pinion, the function of regulating the retracted position of the disk tray by the stopper mechanism is lost, and the pinion locking means is connected to the rack. It is made of a resin material having elasticity that fills the valleys between the adjacent meshing teeth and absorbs the impact associated with the engagement with the meshing teeth of the pinion.

With this configuration, in the step of performing the backward movement of the disc tray, before the contact surface engages with the receiving surface, the meshing teeth of the pinion are locked to the resin material as the pinion locking means , and the pinion of the pinion The rotation stops and the rack feed action by the pinion stops. For this reason, the retracted position of the disc tray is accurately defined as the position when the meshing teeth of the pinion are locked to the resin material as the pinion locking means. Moreover, the operation of engaging the meshing teeth of the pinion with the resin material as the pinion locking means is performed through the rotational movement of the meshing teeth accompanying the rotation of the pinion, as described with reference to FIG. Pinion engagement since the contact surface 41 of the engaging claw 4 does not collide with the receiving surface 21 of the receiving piece 2 from the front through a linear motion when the disc tray 3 moves backward. The impact when the teeth are locked to the pinion locking means is reduced, and the frequency and sound pressure of the collision sound are also reduced, so that the collision sound is remarkably reduced or the collision sound is reduced to a level that can be ignored. Further, even if the resin material is bent and deformed due to its elasticity when the meshing teeth of the pinion are locked to the resin material as the pinion locking means, the amount of the resin material is adjacent to the rack. Since the amount of deformation is so small that it fills the valleys between the meshing teeth, the bending deformation width is also small, the restoration width is also small, the pinion is pushed back, and the disk tray is moved from the retracted position together with the rack. There is no deviation.

  POM resin can be suitably used for the resin material. POM resin is a name obtained by omitting the chemical name polyoxymethylene resin, and is generally a thermoplastic resin called polyacetal, acetal resin or the like. A representative example of this POM resin is Duracon, which is mainly used for molding machine element parts such as gears. In addition, POM resin exhibits high elastic modulus, elastic recovery, creep resistance, and fatigue resistance under a wide range of temperature conditions, thus suppressing the occurrence of collision noise when pinion meshing teeth are locked It can be said that it is optimal as a resin material.

The disk device according to the present invention includes a disk tray that is slidably attached to the enclosure and that moves in and out of the enclosure and carries the disk in and out. And a pinion rack mechanism comprising a pinion provided on the enclosure and a rack provided on the disk tray, and restricts the retracted position of the disk tray drawn out of the enclosure. A stopper mechanism is provided, and the stopper mechanism is provided on one side of the enclosure and the disk tray, and provided on the other side to engage with the receiving surface, thereby restricting the retracted position of the disk tray. In the disk device having a contact surface, the contact surface reaches the engagement position with the receiving surface by the retreating operation of the disk tray. When the pinion is moved to the immediately preceding position, the pinion is engaged with the meshing teeth of the pinion to stop the rotation of the pinion, thereby adding a pinion locking means for stopping the rack feeding action by the pinion. The stopping means is made of POM resin having elasticity capable of absorbing the impact associated with the engagement with the meshing teeth of the pinion by filling the valleys between the meshing teeth adjacent to each other of the rack, and It is possible to adopt a configuration in which the pinion is made of a molded product of POM resin. According to this, both the resin material as the pinion locking means and the meshing teeth of the pinion locked thereto are POM resin. Therefore, the impact at the time of locking is remarkably relieved and almost no collision sound is generated.

  In the disk device according to the present invention, the retraction position of the disk tray is defined by locking the meshing teeth of the pinion with a resin material, particularly preferably POM resin that fills the valley portions between the rack teeth of the rack. Although the impact is well absorbed by the POM resin, the collision sound is remarkably reduced or the collision sound is reduced to a negligible level, but the retracted position of the disc tray is accurately defined. As a result, the operational quality of the disk device is improved and the usability for the user is improved.

  1 is a partially broken plan view showing a schematic configuration of a disk device according to the present invention, FIG. 2 is a schematic plan view showing the configuration of a main part, and FIG. 3 is a schematic plan view further expanding the main part of FIG. It is.

  As shown in FIG. 1, in this disk apparatus, a disk tray 3 indicated by an imaginary line is attached to a resin enclosure 1 as a chassis so as to be retractable. Enclosure 1 serves as an element required for recording / reproducing processing on the disk recording surface, for example, an optical pickup, its control board, a turntable, a motor as its drive source, and a drive source for moving disk tray 3 out and out. A motor or the like (both not shown) is mounted. The operation of moving the disk tray 3 out and out is performed by a pinion rack mechanism 5 including a pinion 51 as a tray gear provided in the enclosure 1 and a straight rack 55 provided in the disk tray 3. The rotation of the pinion 51 is transmitted to the rack 55 on the back surface of the disc tray 3 and converted into a linear motion, and the disc tray 3 is moved out of the enclosure 1. Further, by placing a disk (not shown) on the disk tray 3 drawn out of the enclosure 1 and drawing the disk tray 3 into the enclosure 1, the disk is determined for recording / reproduction. In contrast to being loaded into the set position, the disk is unloaded from the set position by pulling the disk tray 3 out of the enclosure 1.

  This disk device is provided with a stopper mechanism A that operates mechanically. This stopper mechanism A exerts an action of preventing the disk tray 3 drawn out of the enclosure 1 from being pulled out of the enclosure 1, and as shown in FIG. The receiving surface 21 of the receiving piece 2 provided in the side and the contact surface 41 of the engaging claw 4 provided in the disc tray 3 side are provided. In other words, by erasing the function of restricting the retracted position of the disk tray 3 by the stopper mechanism A described with reference to FIG. It is used to prevent.

  As shown in FIG. 2 or FIG. 3, in the disk device of this embodiment, pinion locking means 6 is added, and this pinion locking means 6 is engaged by the retraction operation of the disk tray 3 in the direction of arrow a. When the contact surface 41 of 4 moves to a position immediately before reaching the engagement position with the receiving surface 21 of the receiving piece 2, the pinion 51 is engaged with one meshing tooth 52 to stop the rotation of the pinion 51. Thus, the feeding action of the rack 55 by the pinion 51 is stopped. The pinion locking means 6 has elasticity capable of absorbing a shock associated with locking with the meshing teeth 52 of the pinion 51 by filling the valleys 57 between the meshing teeth 56 and 56 adjacent to each other of the rack 55. Resin material, specifically, POM resin. In addition, the pinion 5 is also a POM resin molding.

  In the above configuration, when the disk tray 3 is pulled out of the enclosure 1 by the rotation of the pinion 51 and the feeding force applied to the rack 55 as indicated by the arrow a in FIG. Immediately before engaging the contact surface 41 of the claw 4 with the receiving surface 21 of the receiving piece 2, one meshing tooth 52 of the pinion 51 is locked to the pinion locking means 6 made of POM resin and the pinion 51 rotates. Stops, and the feeding action of the rack 55 by the pinion 51 stops. Therefore, the retracted position of the disc tray 3 is accurately defined as the position when the meshing teeth 52 of the pinion 51 are locked to the pinion locking means 6. At this time, since the contact surface 41 and the receiving surface 21 are separated from each other, there is no room for generating a collision sound when the contact surface 41 collides with the receiving surface 21. Further, the operation of engaging the meshing teeth 52 of the pinion 51 with the pinion locking means 6 is performed through the rotational movement of the meshing teeth 52 accompanying the rotation of the pinion 51. , The frequency and sound pressure of the collision sound are reduced, and the collision sound is remarkably reduced, or the collision sound becomes small enough to be ignored.

  In particular, in this embodiment, the pinion locking means 6 is formed of a POM resin known as a resin material that exhibits high elastic modulus, elastic recovery, creep resistance, and fatigue resistance under a wide range of temperature conditions. Therefore, the impact when the meshing teeth 52 of the pinion 51 are locked by the pinion locking means 6 is efficiently absorbed by the POM resin, and even if the disk tray 3 is frequently withdrawn and withdrawn, the POM The impact absorbing action by the resin is not impaired over a long period of time, and its durability is improved. In addition, since the pinion 51 itself is also made of POM resin, the collision noise is remarkably relieved and almost no collision noise is generated.

  When the meshing teeth 52 of the pinion 51 are locked to the pinion locking means 6, the operation of retracting the disk tray 3 is started smoothly so that the meshing teeth 52 are not engaged with the pinion locking means 6. It is required to keep it. In order to prevent the meshing teeth 52 from being caught in the pinion locking means 6, the height of the resin layer surface 61 of the POM resin that fills the valley 57 between the meshing teeth 56 of the rack 55 is set appropriately. Can be determined.

  In order to facilitate understanding of the description, the same or corresponding parts in FIGS. 1 to 4 are denoted by the same reference numerals.

1 is a partially broken plan view showing a schematic configuration of a disk device according to the present invention. It is the schematic plan view which showed the structure of the principal part. It is the schematic plan view which expanded further the principal part of FIG. It is a schematic plan view of the principal part of the stopper mechanism of the disk apparatus which is a reference example.

DESCRIPTION OF SYMBOLS 1 Enclosure 3 Disc tray 5 Pinion rack mechanism 6 Pinion locking means 21 Receiving surface 41 Contact surface 51 Pinion 52 Pinion meshing tooth 55 Rack 56 Rack meshing tooth 57 Valley part A Stopper mechanism

Claims (3)

A disk tray that is slidably attached to the enclosure and that moves between the inside and outside of the enclosure to carry in and out of the disk is provided. And a pinion rack mechanism comprising a rack provided on the disk tray, and a stopper mechanism for restricting the retracted position of the disk tray pulled out of the enclosure, the stopper mechanism Has a receiving surface provided on one side of the enclosure and the disk tray, and a contact surface provided on the other side and engaging the receiving surface to restrict the retracted position of the disk tray . In the device
When the contact surface moves to a position just before reaching the engagement position with the receiving surface by the backward movement of the disc tray, the rotation of the pinion is stopped by engaging with the meshing teeth of the pinion. , By adding a pinion locking means for stopping the rack feed action by the pinion, the function of regulating the retracted position of the disk tray by the stopper mechanism is lost,
The pinion locking means is made of POM resin having elasticity capable of absorbing the impact associated with locking with the meshing teeth of the pinion by filling the valleys between the meshing teeth adjacent to each other in the rack, The disk device is characterized in that the pinion is made of a molded product of POM resin. A disk tray that is slidably attached to the enclosure and that moves between the inside and outside of the enclosure to carry in and out of the disk is provided. And a pinion rack mechanism comprising a rack provided on the disk tray, and a stopper mechanism for restricting the retracted position of the disk tray pulled out of the enclosure, the stopper mechanism Has a receiving surface provided on one side of the enclosure and the disk tray, and a contact surface provided on the other side and engaging the receiving surface to restrict the retracted position of the disk tray. In the device
When the contact surface moves to a position just before reaching the engagement position with the receiving surface by the backward movement of the disc tray, the rotation of the pinion is stopped by engaging with the meshing teeth of the pinion. , By adding a pinion locking means for stopping the rack feed action by the pinion, the function of regulating the retracted position of the disk tray by the stopper mechanism is lost ,
The pinion locking means is made of a resin material having elasticity capable of absorbing a shock caused by locking with the meshing teeth of the pinion by filling the valleys between the meshing teeth adjacent to each other in the rack. A disk device characterized by the above. 3. The disk device according to claim 2 , wherein the resin material is a POM resin.

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