JP3724718B2 - Disc loading mechanism of disc recording / reproducing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc recording / reproducing apparatus such as a DVD (Digital Versatile Disc) or a CD (Compact Disc) as a recording / reproducing medium, and a disc mounted on a disc tray that moves between a disc mounting position and a disc ejection position. And a disk loading mechanism for carrying the disk in or out of the recording / reproducing apparatus.
[0002]
[Prior art]
In a disk loading mechanism for loading or unloading a disk by a disk tray, the disk tray is located at any of three positions: a disk ejection position (EJECT position), a disk loading position (IN position), and a midway transport position between the two. It is necessary to determine whether In general, an EJECT / IN switch that is simply turned on and off by a pressing operation and an operation release is provided as an operation means for inputting a command for driving a disc tray in this type of disc loading mechanism. Since the disc tray is moved toward the position opposite to the current position when is turned on, it is necessary to keep track of the current location of the disc tray. This is because it is necessary to stop the positioning when it is moved to the mounting position or the disk ejection position. Conventionally, two single contact type tray position detection switches are provided for detecting the disk discharge position and for detecting the disk mounting position.
[0003]
However, in the above-described disk tray position detection means, since two single contact type tray position detection switches are disposed, a space for disposing two switches is required, and components including a wiring member are included. Since the number of points increases, there is a drawback that the device configuration is complicated and the manufacturing cost is likely to be high. On the other hand, a disk tray position detecting means using a two-contact type tray position detecting switch of a first contact and a second contact is also known. However, the two-contact type tray position detecting switch has a large switch body. In addition to requiring a large installation space, there are the same disadvantages as described above that the number of parts including peripheral members increases and the manufacturing cost increases. Therefore, a disk loading mechanism has been proposed in which the position of the disk tray can be detected based on a single tray position detection switch and the voltage application history of the loading motor (see Japanese Patent Application Laid-Open No. 11-25557).
[0004]
In the disk loading mechanism, the conveying means for conveying the disk tray between the disk discharge position and the disk loading position includes a loading motor that can rotate forward and reverse, and the rotational power of the loading motor is linearly moved with respect to the disk tray. And a reduction gear train including a cam gear 1 shown in FIG. As shown in FIGS. 5B to 5D, a single contact type tray position detection switch 2 for detecting the position of the disk tray is disposed in the vicinity of the cam gear 1. A concave and convex cam surface having a pair of protrusions 1 a and 1 b is formed on the lower surface of the cam gear 1, and the tray position detection switch 2 has its own contact actuator 2 a as one of the protrusions 1 a, It is turned on when pressed by 1b. FIGS. 5B to 5D show a state where the tray position detection switch 2 is turned on at the disk unloading position, turned off at the intermediate position, and turned on at the disk loading position.
[0005]
Since the disk loading mechanism does not know the position of the disk tray when the power is turned on, the control microprocessor is driven to rotate in the disk ejection direction with respect to the loading motor when the tray position detection switch 2 is on when the power is turned on. If the voltage is applied for a certain time and the switch remains on, it is determined that the disc tray is in the disc ejection position. If the switch is turned off, the disc tray It is determined that it is located at the mounting position. If the current position of the disc tray can be specified as described above, thereafter, every time the EJECT / IN switch is turned on, the tray position found immediately after power-on and the subsequent voltage application history to the loading motor are referred to. Then, control is performed so that the disc tray is transported to the disc loading position when it is at the disc ejection position and toward the disc ejection position when it is at the disc loading position.
[0006]
[Problems to be solved by the invention]
The disk loading mechanism has an advantage that the whole mechanism can be simplified because only one single contact type tray position detection switch 2 can be used to detect three types of tray positions. On the other hand, the above-described disk loading mechanism is expensive because the cam gear 1 needs to be processed and manufactured with extremely high accuracy, and the cam gear 1 and the disk tray need to be assembled at an accurate relative position. There is a problem to be attached.
[0007]
That is, the cam gear 1 which is one of the components of the tray conveying means is a relatively small member, and contacts the disk tray when the disk tray is positioned at the disk loading position and the disk discharging position on the lower surface of the small space. Since the two types of protrusions 1a and 1b must be formed in such an arrangement that the tray position detection switch 2 is reliably turned on by contacting the actuator 2a, it is necessary to perform high-precision processing when forming the uneven cam surface. There will be expensive.
[0008]
Further, the cam gear 1 reliably turns the tray position detection switch 2 when the disc tray moves to the disc loading position and the disc ejection position with respect to the disc tray to which the rotational movement of the cam gear 1 is converted into a linear movement. Since the relative position must be accurately positioned and assembled so as to be turned on, the assembly takes time and the manufacturing cost is high. If the relative position of the cam gear 1 and the disc tray is not accurately positioned, the disc tray is stopped at the front even if it is a small amount of the predetermined disc loading position or the disc ejection position, and the recording operation on the disc is performed. Or the malfunction which cannot perform reproduction | regeneration operation | movement correctly will arise.
[0009]
Accordingly, the present invention has been made in view of the above-described conventional problems, and can be easily assembled with a simple configuration while having a configuration in which the position of the disc tray can be accurately and reliably detected by a single tray position detection switch. An object of the present invention is to provide a disk loading mechanism of a disk recording / reproducing apparatus capable of reducing the manufacturing cost.
[0010]
[Means for Solving the Problems]
  In order to achieve the above object, the invention according to claim 1 is capable of linearly moving between a disk loading position and a disk ejection position by mounting a conveyance drive motor capable of rotating forward and reverse and a disk of a recording / reproducing medium. Arranged inA pair of trigger protrusions are disposed at two predetermined positions along the moving direction.ThisTheA tray, and a disk tray transport mechanism that converts the rotational power of the transport drive motor into the linear motion of the disk tray and transmits the same.A tray operation switch that inputs a tray drive command signal only during operation and stops signal input when the operation is canceled;The disc tray has been moved to the disc loading position and the disc ejection position, respectively.One of the pair of trigger protrusions facing each other at the timeDetectpositionOutput detection signalOne single contact typeA tray position detection switch;And a memory for updating and storing position information after stopping the positioning of the disk tray, which is alternately positioned at a disk loading position and a disk discharging position by movement, and a control section for controlling the entire loading mechanism. When the power to the disk recording / reproducing device is turned on, the drive motor is driven to transport the disk tray toward the disk mounting direction, and the disk mounting of the disk tray is performed based on the output of the tray position detection switch. After determining the positioning to the position, the disk mounting position is stored in the memory as initial tray position information, and then the tray read out from the memory each time a tray drive command signal is input from the tray operation switch. The disc tray is transported toward the position opposite to the position information. The feed driving motor is driven, and when the position detection signal is input from the tray position detection switch, the rotation driving of the transport driving motor is stopped, and the tray position information stored in the memory is opposite to this. Change the tray position information of the direction and repeat the control process to update and store in the memoryIt is a feature.
[0011]
  In the disc loading mechanism of this disc recording / reproducing apparatus,Control that stores the initial position information of the disk tray specified at power-on in the memory, then transports the disk tray in the opposite direction to the position information stored in the memory, and updates and stores the position information of the memory after the transport Since the process is repeated, it is possible to provide a tray operation switch that sequentially inputs a simple tray drive command signal that does not specify the disc tray conveyance direction and a single contact type tray position detection switch, but the disc tray is not affected. Therefore, it is not necessary to determine the disc tray conveyance direction by referring to the voltage application history to the conveyance drive motor every time the tray operation switch is operated, and two single contact type tray position detection switches are provided. Compared with the case where two pieces or a two-contact type tray position detection switch is provided, the manufacturing cost is greatly It can be reduced. Moreover,Since a pair of trigger protrusions are provided in a wide space of a disc tray, which is a relatively large member, processing is remarkably easy because less precision is required. Further, since the disk tray has only to be provided with projections for triggering at two positions opposite to the position where the tray position detection switch is disposed when the disk tray is moved to the disk loading position and the disk ejection position, respectively. Thus, as compared with the case where the concave and convex surfaces are formed on the cam gear that converts the rotational motion of the device itself into a linear motion and transmits it to the disc tray, it can be manufactured at a low cost without requiring a highly accurate setting.Furthermore, since the initial position of the disk tray when the power is turned on is set to the disk loading position, the disk tray positioned at the disk loading position protrudes to the ejection position at the same time as the power is turned on, which surprises the user. Does not occur.
[0012]
On the other hand, when assembling, the tray position detection switch is positioned and arranged directly with respect to the linearly moving disk tray, so that the relative position between the tray position detection switch and the disk tray can be easily and accurately positioned. In addition, the tray position detection switch detects a pair of trigger protrusions of the disc tray that has moved to the disc loading position and the disc ejection position, respectively, so that the tray position detection switch is on unless the disc tray moves accurately to the disc loading position and the disc ejection position. Therefore, the disk tray can be accurately positioned.
[0013]
  The disk loading mechanism of the disk recording / reproducing apparatus according to the second aspect of the invention is arranged to convey the disk to the disk loading position and the disk ejection position by mounting the disk of the recording / reproducing medium and moving linearly. , Along the transport directionPredeterminedIn two locationsA pair ofTriggerCrashA disc tray provided with a section, a disc tray transport mechanism that converts the rotational power of a transport drive motor that can rotate forward and backward into the linear motion of the disc tray, and transmits the disc tray to the disc tray. Position and disc ejection position respectively.At the timeThe triggerCrashPartReceiving pressure from the positionOutput detection signalOne single contact typeA tray position detection switch;The disc tray is positioned in the disc loading direction when the power to the disc recording / reproducing device is turned on, and the memory in which the location information of the disc tray after the positioning stop is updated and stored. After the conveyance drive motor is driven so as to convey the disk, the disk tray is discriminated from the disk mounting position based on the change in the output of the tray position detection switch, and the initial position information of the disk tray is stored in the memory. And after that, every time a tray drive command signal is input, the transport drive motor is driven so as to transport the disc tray toward a position opposite to the tray position information read from the memory, andFrom the tray position detection switchpositionDetection signalButinputAt the timeStop the rotation drive of the transport drive motorAnd repeating the control process of changing the tray position information stored in the memory to the tray position information in the opposite direction and updating and storing it in the memory.It is a feature.
[0014]
  According to this configuration,For example, a single contact-type tray position detection switch is provided even when a simple tray drive command signal that does not specify the transport direction is input by a tray operation switch that is simply turned on and off by pressing and releasing. Therefore, when two single-contact type tray position detection switches are provided or two-contact type tray position detection switches are used.TsuThe manufacturing cost can be greatly reduced as compared with the case where the hose is provided. A pair of tonerRigaCrashThe disc tray having the portion can be easily processed and can be manufactured at low cost without requiring high-precision setting.further,When assembling,It is mechanically operated by being pressed by either one of the pair of trigger protrusions on the disc tray.Tray position detection switch,Since the disk tray that moves linearly is positioned and arranged directly, the relative position between the tray position detection switch and the disk tray can be easily and accurately positioned.Furthermore, since the initial position of the disk tray when the power is turned on is set to the disk loading position, the disk tray positioned at the disk loading position protrudes to the ejection position at the same time as the power is turned on, which surprises the user. Does not occur.
[0015]
  The disc loading mechanism of the disc recording / reproducing apparatus of the invention according to claim 3 is:Provided with a tray operation switch that inputs a tray drive command signal only during operation and stops signal input when the operation is canceled, a pair of trigger protrusions of the disk tray instead of the single contact type tray position detection switch Has a configuration using a tray position detection switch for optically detecting the.
[0016]
  According to this configuration, the disk tray can bePosition the disc to the disc loading position and display the initial tray position information.Store in memoryBecauseTray operation switch after thisofoperationEven if a simple tray drive command signal that does not specify the transport direction is sequentially input byReads the tray position information of the memory and indicates the transport direction of the disk tray.certainlySettingcan do. In addition, since the tray position detection switch that optically detects the trigger protrusion does not cause deterioration of contact operation over time, high reliability can be ensured over a long period of time.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing a schematic configuration of a disk loading mechanism of a disk recording / reproducing apparatus according to an embodiment of the present invention. FIGS. 1 (a), (b), and (c) show a disk tray 3 in a disk loading position. FIG. 2 shows a state where the disc is positioned at the disc discharge position and the intermediate position.
[0018]
The disc tray 3 is provided with two types of discs for setting two types of discs, each having a substantially elliptical reading hole 4 arranged in the longitudinal direction in a substantially central portion of a rectangular plate. Disk mounting portions 7 and 8 are recessed in the upper surface. A disk (not shown) set on any of the disk mounting portions 7 and 8 is lifted from below the reading hole 4 through the reading hole 4 when positioned at the disk mounting position in FIG. The recording information is read optically through the reading hole 4 by a known pickup (not shown) that is lifted and rotated above the disk tray 3 by the coming disk mounting portion and moves along the reading hole 4. Or the information is recorded. The disc tray 3 is slidably provided on the chassis 9 so that the disc loading position where the reproducing operation or recording operation of the disc shown in FIG. 1A can be performed and the disc shown in FIG. It is reciprocated linearly between the disc ejection position.
[0019]
The upper part of the chassis 9 is covered with a lid (not shown) to form a case, and an entrance (not shown) of the disc tray 3 is opened at the front end (lower end in FIG. 1) of the case. Yes. Therefore, the disc tray 3 is moved in the disc loading direction A and stored in the disc loading position inside the case, and is moved in the disc ejection direction B so as to protrude through the opening to the disc ejection position outside the case. It is supposed to be. Since the above-described configuration is extremely well known, the illustration thereof is omitted.
[0020]
A single contact type tray position detection switch 2 similar to that used in the conventional mechanism shown in FIG. 5 is disposed at a predetermined location near the front end of the chassis 9. On the side surface along the transport direction facing the tray position detection switch 2 in the disk tray 3, the contact actuator 2a of the tray position detection switch 2 can be pressed when it is positioned at the disk mounting position and the disk discharge position. A pair of trigger protrusions 10 and 11 are provided in a protruding manner.
[0021]
In the disk loading mechanism described above, the pair of trigger protrusions 10 and 11 project in the wide space of the disk tray 3 which is a relatively large member as described above, and thus the cam gear 1 which is a conventional relatively small member. Compared with the case where the concave-convex cam surface having the pair of protrusions 1a, 1b is formed, the precision is not so much required, so that the processing is much easier. Furthermore, the disc tray 3 is configured to project trigger projections 10 and 11 at two positions opposite to the arrangement position of the tray position detection switch 2 when moved to the disc loading position and the disc ejection position, respectively. Compared to the case where the concave and convex cam surface is formed on the cam gear that converts the rotational motion of the device itself into a linear movement and transmits it to the disc tray as in the past, it is inexpensive and does not require high-precision setting. Can be produced.
[0022]
In assembly, the tray position detection switch 2 is directly positioned with respect to the disk tray 3 that moves linearly, so that the relative position between the tray position detection switch 2 and the disk tray 3 can be easily and accurately positioned. it can. In addition, the tray position detection switch 2 is turned on by directly receiving the pressing action of the pair of trigger protrusions 10 and 11 of the disk tray 3 moved to the disk loading position and the disk ejection position, respectively. Since the disk tray 3 is not turned on unless it is accurately moved to the disk loading position and the disk ejection position, the disk tray 3 can be accurately positioned.
[0023]
FIG. 2 is a block diagram showing an operation control system of the disk loading mechanism. The control unit 12 including a microcomputer controls the entire disk loading mechanism by executing a control program stored in the ROM based on various data stored in the RAM. In other words, when a command signal is input by operating the tray operation switch 13, the control unit 12 instructs the transport drive motor 14 to rotate in the forward direction or the reverse direction, and the transport drive motor 14 causes the disk to rotate. The tray transport mechanism 17 is operated to move the disk tray 3 in the disk mounting direction A or the disk ejection direction B, and the rotation of the transport drive motor 14 is stopped when a detection signal is input from the tray position detection switch 2. Then, control is performed to stop the positioning of the disk tray 3. The control unit 12 determines the position of the disc tray 3 when the power is turned on and stores the determination result in the memory 18, which will be described in detail later.
[0024]
The disc tray transport mechanism 17 decelerates the rotation of the transport drive motor 14 and then converts it into the linear motion of the disc tray 3 and transmits it to the disc tray 3. This is a known configuration. However, since the position of the disk tray 3 is directly detected by the tray position detection switch 2 in the above embodiment, the disk tray transport mechanism 17 detects the position of the disk tray 3 as in the conventional mechanism shown in FIG. No means are provided. The tray operation switch 13 is the same as the EJECT / IN switch generally provided in the conventional mechanism. The tray operation switch 13 is simply turned on and off by the pressing operation and the operation release. When a command signal for turning on the tray operation switch 13 is input, the disk tray 3 is controlled to move to a position opposite to the current position. This will be described in detail later.
[0025]
Control processing by the control unit 12 in the disk loading mechanism will be described with reference to the flowchart of FIG. The controller 12 constantly monitors whether or not the power is turned on (step S1), and when determining that the power is turned on, determines whether or not the tray position detection switch 2 is on (step S2). ). Here, when the tray position detection switch 2 is in the ON state, the disk tray 3 is positioned at either the disk loading position or the disk ejection position. Cannot be determined. Therefore, the control unit 12 gives a command to rotate, for example, in the forward direction to the conveyance control motor 14 and controls the disk tray 3 to move in the disk loading direction (step S3). The disk tray 3 is controlled to be transported toward the disk mounting position as described above if the disk tray 3 is positioned at the disk mounting position and turned on when the power is turned on. This is because if the 3 protrudes to the discharge position, the user will be surprised.
[0026]
After controlling the disc tray 3 to move toward the mounting position as described above, the control unit 12 monitors whether or not the tray position detection switch 2 has changed from the on state to the off state (step S4). When the tray position detection switch 2 changes from the on state to the off state, the control unit 12 determines that the disk tray 3 that has been positioned at the disk discharge position has started moving toward the disk mounting position, and the tray 12 Control is performed so that the forward drive motor 14 continues to rotate in the forward direction until it is determined that the position detection switch 3 is turned on again (step S5). The control unit 12 stops the rotation of the transport driving motor 14 when the tray position detection switch 2 is turned on and positions the disk tray 3 at the disk mounting position. 2 ”is stored in the memory 18 of FIG. 2 (step S6).
[0027]
On the other hand, after controlling the disc tray 3 to move toward the disc loading position (step S3), the control unit 12 holds the tray position detection switch 2 on for a certain period of time so that the disc tray 3 is loaded. When it is determined that the disk has been positioned (step S4), the driving of the transport drive motor 14 is stopped (step S7), and the tray position information “the disk tray is present at the disk loading position” is stored in the memory 18. Store (step S6).
[0028]
Further, when the control unit 12 determines that the disc tray 3 is located between the loading position and the ejection position based on the tray position detection switch 2 being in the OFF state after the power is turned on (step S2). After controlling the disk tray 3 to move toward the disk mounting position (step S9), the tray position detection switch 2 is turned on after waiting for the tray position detection switch 2 to turn on (step S9). When it is determined that the disk tray 3 has been positioned at the disk mounting position, the drive of the conveyance drive motor 14 is stopped (step S10), and the tray position information “the disk tray is at the disk mounting position” is stored in the memory 18. (Step S6).
[0029]
After the power is turned on as described above, the position of the disk tray 3 is specified, and the tray position information “the disk tray is in the disk loading position” is stored in the memory 18. Is turned on (step S11), and when it is determined that the tray operation switch 13 is turned on, the tray position information is read from the memory 18, and the direction opposite to the position of the tray position information is read. The conveyance drive motor 14 is driven and controlled so as to convey the disc tray 3 toward (step S12). In this case, since the disc tray 3 is positioned at the disc loading position, in order to convey the disc tray 3 toward the disc ejection position, the conveyance drive motor 14 is controlled to rotate reversely, for example.
[0030]
After that, the controller 12 monitors whether the tray position detection switch 2 is once turned off from the on state and then turned on again (step S13). The rotation of the motor 14 is stopped. At this time, the disk tray 3 is stopped at the disk unloading position. Then, the control unit 12 updates the tray position information to “the disc tray exists at the disc ejection position” and stores it in the memory 18 (step S15). Subsequently, the control unit 12 returns to step S11 until it is determined that the power supply is cut off (step S16), and then performs the control processing of steps S11 to S15 each time the tray operation switch 13 is turned on. By repeating, the disk tray 3 is reciprocated between the disk loading position and the disk ejection position.
[0031]
Therefore, if the position of the disk tray 3 is specified when the power is turned on, each time the tray operation switch 13 is operated, the tray position information in the memory 18 is read and the transport direction of the disk tray 3 is set. Thus, there is no need to refer to the voltage application history to the conveyance drive motor 14.
[0032]
In the above embodiment, as the position detection switch 2, a case where a single contact that is mechanically operated as in the prior art is used is illustrated. However, as shown in FIG. Even if the tray position detection switch 19 that optically detects the trigger protrusions 11 and 12 of the disk tray 3 by the unit 21 is used, the same effect as described in the above embodiment can be obtained. Furthermore, as indicated by a two-dot chain line, a reflective optical element made up of a light projecting / receiving element can also be used as a tray position detection switch. If such a tray position detecting element 19 for optical detection is used, the contact operation does not deteriorate over time as in the case of the single contact type position detecting switch 2, and thus high reliability is ensured over a long period of time. be able to. FIG. 4 shows a lid 22 not shown in the above embodiment, and an entrance / exit 23 of the disc tray 3 formed by the lid 22 and the chassis 9.
[0033]
【The invention's effect】
  As described above, according to the disk loading mechanism of the disk recording / reproducing apparatus of the present invention,Because it is possible to control the movement of the disc tray without any trouble while having a configuration in which a tray operation switch that sequentially inputs a simple tray drive command signal that does not specify the disc tray conveyance direction and a single contact type tray position detection switch is provided. Since there is no need to determine the disc tray conveyance direction by referring to the voltage application history to the conveyance drive motor every time the tray operation switch is operated, there are two single contact type tray position detection switches or two contact points. Compared with the case where a mold tray position detection switch is provided, the manufacturing cost can be greatly reduced. Moreover,Since a pair of trigger protrusions are provided in a wide space of a relatively large member of the disk tray, it does not require much precision, so processing is much easier.When moved to the disc loading position and disc ejection position, the tray position detectionBOpposite to the positionSince it is only necessary to project the trigger protrusions at two positions, it is higher than in the case of forming an uneven surface on the cam gear that converts the rotational motion of the trigger itself into a linear motion and transmits it to the disc tray as in the prior art. It can be manufactured at low cost without requiring precise settings. On the other hand, during assembly, the tray position detection switch is positioned and arranged directly with respect to the linearly moving disc tray.it canTherefore, the relative position between the tray position detection switch and the disk tray can be easily and accurately positioned. In addition, since the tray position detection switch is not turned on unless the disc tray is accurately moved to the disc loading position and the disc ejection position, the disc tray can be accurately positioned.Furthermore, since the initial position of the disk tray when the power is turned on is set to the disk loading position, the disk tray positioned at the disk loading position protrudes to the ejection position at the same time as the power is turned on, which surprises the user. Does not occur.
[Brief description of the drawings]
FIGS. 1A and 1B are plan views showing a schematic configuration of a disk loading mechanism of a disk recording / reproducing apparatus according to an embodiment of the present invention. FIGS. It is in a state where it is located at the discharge position and the intermediate position.
FIG. 2 is a block configuration diagram of an operation control system of the disk loading mechanism of the above.
FIG. 3 is a flowchart showing control processing of the disk loading mechanism of the above.
FIG. 4 is a schematic longitudinal sectional view showing a schematic configuration of a disk loading mechanism of a disk recording / reproducing apparatus according to another embodiment of the present invention.
5A is a plan view of a cam gear provided in a disc loading mechanism of a conventional disc recording / reproducing apparatus, and FIGS. 5B to 5D show the operation of a tray position detection switch when the cam gear rotates. FIG.
[Explanation of symbols]
2,19 Tray position detection switch
3 Disc tray
10, 11 Protrusion for trigger (trigger part)
12 Control unit
14 Transport drive motor
17 Disc tray transport mechanism
18 memory
A Disc loading direction
B Disc ejection direction

Claims (3)

A transport drive motor capable of forward and reverse rotation;
A recording / reproducing medium disk is mounted and is linearly movable between the disk mounting position and the disk ejection position, and a pair of trigger protrusions are disposed at two predetermined positions along the moving direction. and disk trays,
A disk tray transport mechanism that converts the rotational power of the transport drive motor into the linear motion of the disk tray and transmits it;
A tray operation switch that inputs a tray drive command signal only during operation and stops signal input when the operation is canceled;
One single-contact tray position that detects one of the pair of trigger projections facing each other when the disk tray is moved to the disk loading position and the disk ejection position and outputs a position detection signal A detection switch;
A memory in which position information after stopping the positioning of the disk tray, which is alternately positioned at a disk mounting position and a disk discharging position by movement, is updated and stored;
And a control unit that controls the entire loading mechanism,
The control unit is
When the power to the disk recording / reproducing apparatus is turned on, the transport drive motor is driven to transport the disk tray in the disk mounting direction, and the disk tray is moved to the disk mounting position based on the output of the tray position detection switch. After determining the positioning, the disk mounting position is stored in the memory as initial tray position information,
After that, every time a tray drive command signal is input from the tray operation switch, the transport drive motor is driven so as to transport the disc tray toward a position opposite to the tray position information read from the memory. When the position detection signal is input from the tray position detection switch, the rotation driving of the transport driving motor is stopped, and the tray position information stored in the memory is changed to the tray position information in the opposite direction. And a disc loading mechanism of the disc recording / reproducing apparatus, wherein the control process of updating and storing in the memory is repeated . Equipped with a disc recording and reproducing medium is arranged to transport the disk to the disk mounting position and the disk ejection position by linear movement, collision portion is a pair of trigger predetermined two positions along the conveying direction A disc tray provided,
A disk tray transport mechanism that converts the rotational power of a transport driving motor capable of rotating in the forward and reverse directions into the linear motion of the disk tray and transmits it;
And a single contact-type tray position detecting switch one of said disc tray for outputting a position detection signal by receiving the pressing force from the trigger collision portion at the time of the move to each of the disc attachment position and the disc ejected position,
A memory in which position information after stopping the positioning of the disk tray, which is alternately positioned at a disk mounting position and a disk discharging position by movement, is updated and stored;
When the disk recording / reproducing apparatus is powered on, the disk drive motor is driven to transport the disk tray in the disk mounting direction, and then the disk tray is positioned to the disk mounting position based on the change in the output of the tray position detection switch. Determine the state, store the initial position information of the disk tray in the memory,
Thereafter, each time a tray drive command signal is input, the transport drive motor is driven to transport the disc tray toward a position opposite to the tray position information read from the memory, and the tray position detection is performed. the rotation of the conveyance drive motor when the position detection signal is input from the switch is stopped, and updated in the memory by changing in the opposite direction of the tray position information from this tray position information in stored in the memory A disc loading mechanism of a disc recording / reproducing apparatus, characterized by repeating control processing to be stored . The tray operation switch according to claim 2, wherein a tray drive command signal is input only during operation, and the signal input is stopped by canceling the operation.
A disk loading mechanism of a disk recording / reproducing apparatus using a tray position detection switch for optically detecting a pair of trigger protrusions of the disk tray instead of the single contact type tray position detection switch .

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