JP3656748B2 - 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 Parsatile Disc) or a CD (Compact Disc) as a recording / reproducing medium, and the disc is moved to a disc tray that moves between a disc mounting position and a disc ejection position. And a disk loading mechanism for loading / unloading the disk to / from the recording / reproducing apparatus.
[0002]
[Prior art]
In a disk loading mechanism for loading or unloading a disk from a disk tray, the disk tray that moves using a loading motor that is driven to rotate by pressing a tray operation switch as a driving source is a disk ejection position (EJECT position) or a disk loading position (IN position). It is necessary to stop the positioning of the disk tray at the time of detection. Conventionally, a tray position detection switch is provided at each of the disk discharge position and the disk mounting position, and the disk tray is positioned by stopping the driving of the loading motor when one of the tray position detection switches is turned on. Stopped.
[0003]
Further, the stop position of the disc tray is determined based on the tray position detection switch that is in the ON state of the two. The disc tray stop position is determined in this way as an operating means for inputting a command for driving the disc tray in this type of disc loading mechanism, which is simply turned on and off by pressing operation and pressing release, respectively. In general, only the EJECT / IN switch is provided, and when this switch is turned on, the disc tray is moved toward the opposite side of the current position, so the current position of the disc tray is always known. It is necessary to keep it.
[0004]
[Problems to be solved by the invention]
However, in the above-described disk tray position detecting means, since two tray position detection switches are disposed, a space for disposing two switches is required, and components including wiring members for two switches are included. Since the number of points increases, there is a disadvantage that the device configuration becomes complicated and the manufacturing cost is high. On the other hand, there is also a conventional disk loading device that uses a single tray position detection switch to detect that the disk tray has reached the disk loading position and the disk ejection position. However, as the tray position detection switch, a two-contact type switch having a first contact and a second contact is used, and this two-contact type tray position detection switch has a large switch body. In addition to requiring a large arrangement space, there are the same drawbacks as described above, such as an increase in the number of parts including peripheral members and an increase in manufacturing cost.
[0005]
As another conventional disk loading mechanism, for the purpose of easily mounting and removing the disk tray, the switch operating lever is pushed down by a protrusion provided on the disk tray to rotate the switch operating lever. There is known a configuration in which the disk position detection switch is turned on by the action portion of the switch operating lever (see Japanese Utility Model Laid-Open No. 7-10837). In this apparatus, since a switch operating lever is interposed between the disk tray and the disk position detection switch, not only the configuration is further complicated, but also the disk ejection in the two positions where the disk tray should be stopped. The disc tray can be detected only when the position is reached.
[0006]
As another conventional disk loading mechanism, one disclosed in JP-A-7-254200 is also known. This disc loading mechanism can detect that the disc tray during the disc loading operation or the unloading operation has been stopped by a deliberate operation such as holding the disc tray by hand, but the disc tray can be The disk tray cannot be detected when the disk tray is moved to any position.
[0007]
Accordingly, the present invention has been made in view of the above-described conventional problems, and it is possible to accurately detect whether a disc tray has moved to a disc loading position or a disc ejection position with a simple configuration. It is an object of the present invention to provide a disk loading mechanism of an apparatus.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a disk loading mechanism of a disk recording / reproducing apparatus according to the first aspect of the present invention mounts a disk of a recording / reproducing medium and is arranged so as to be linearly movable between a disk loading position and a disk ejection position. A disc tray installed, a loading motor capable of rotating in the forward and reverse directions, a tray transport mechanism that converts the rotational power of the loading motor into a linear motion of the disc tray, and transmits the disc tray; A tray position detection switch that detects the disk tray moved to the disk discharge position and outputs a detection signal; and when the tray operation switch is operated, the disk tray is transported in a direction opposite to the current position. While rotating the loading motor, the detection signal is detected from the tray position detection signal. In the disk loading mechanism of the disk recording / reproducing apparatus including a controller that stops the rotational drive of the loading motor at the time of input, only one of the tray position detection switches is the entrance / exit of the disk tray in the housing. The triggering protrusion for triggering is disposed at a position detected by the tray position detection switch that has reached the disk loading position or the disk discharging position, and is in the transport direction. The control is provided at a position where the small protrusion for trigger having a shorter length than the large protrusion for trigger is detected by the tray position detection switch immediately before reaching the disk ejection position or the disk mounting position. The disc tray stops when the power is turned on by turning on or off the tray position detection switch. Determine the location, when the tray operation switch is operated, said the discriminated stop position is characterized by controlling the rotation of the loading motor to convey the disc tray in the opposite direction.
[0009]
In the disk loading mechanism of this disk recording / reproducing apparatus, a single contact type mechanical tray position detection switch or an optically detected tray position detection switch is used. The tray position detection switch is turned on by a small trigger or large trigger for the disc tray that has a different shape from the disc mounting position, so that the disc tray position can be detected accurately and reliably. Can do. Moreover, since the tray position detection switch is kept on when one of the disk loading position or the disk ejection position is detected and is kept off when the other is detected, the tray position detection switch is turned on immediately after the power is turned on. Alternatively, the disc tray stop position can be determined immediately and accurately depending on the off state, and thereafter, every time the tray operation switch is turned on, the voltage application history to the loading motor as in the past. There is no need to refer to.
[0010]
The disk loading mechanism of the disk recording / reproducing apparatus according to the second aspect of the present invention is operated by a loading motor capable of rotating in the forward and reverse directions so that the disk tray on which the disk of the recording / reproducing medium is mounted is moved to the disk loading position and the disk ejection position. And a detection signal for detecting the disc tray moved to the disc loading position and the disc ejection position, respectively. A single tray position detection switch that outputs the rotation of the loading motor so that the disk tray is conveyed in a direction opposite to the current position when the tray operation switch is operated, and the tray position When the detection signal is input from the detection switch, the loading is performed. A control unit for stopping the drive of the data, and the disc tray has a trigger small projection and a trigger large projection having different lengths in the transport direction, the disc loading position and the disc ejection. It is arranged at each position detected by the tray position detection switch moved to the position.
[0011]
According to this configuration, although only one single contact type mechanical tray position detection switch or optically detected tray position detection switch is used, the disk discharge position and the disk mounting position are different. Since the tray position detection switch is turned on by the small trigger for the disc tray or the large trigger for the trigger of the disc tray, the position of the disc tray can be detected accurately and reliably.
[0012]
According to a third aspect of the present invention, there is provided a disk loading mechanism for a disk recording / reproducing apparatus according to the second aspect of the present invention, wherein the trigger large protrusion is connected to the tray position detection switch that has reached the disk loading position or the disk ejection position. The control unit is disposed at a position where the small protrusion for trigger is detected by the tray position detection switch immediately before reaching the disk discharge position or the disk mounting position. Has a function of determining the stop position of the disc tray based on whether the tray position detection switch is turned on or off when the power is turned on and / or when the tray operation switch is operated.
[0013]
According to this configuration, the tray position detection switch is kept on when one of the disk loading position or the disk ejection position is detected, and is kept off when the other is detected. In this operation, the stop position of the disc tray can be immediately and accurately determined depending on whether the tray position detection switch is on or off, and the transport direction of the disc tray can be immediately determined.
[0014]
According to a fourth aspect of the present invention, there is provided a disk loading mechanism for a disk recording / reproducing apparatus according to the second or third aspect, wherein the disk tray has a plurality of trigger protrusions having different lengths along the conveying direction. Are arranged at three or more locations including the disk loading position and the disk ejection position, and the control unit drives the loading motor when the tray position detection switch detects the specified trigger protrusion. It has the structure which controls to stop.
[0015]
According to this configuration, although only one tray position detection switch is used, the protrusion of the disk tray for turning on the tray position detection switch has a different shape and is provided in a predetermined arrangement. It is possible to accurately detect three or more positions on the disk tray and control the positioning of the disk tray at that position.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a disk loading mechanism of a disk recording / reproducing apparatus according to an embodiment of the present invention, wherein (a) and (c) exclude the lid 8 with the disk tray 1 positioned at the disk mounting position. A schematic plan view and a schematic cut left side view, (b) and (d) are a schematic plan view and a schematic cut left side view, respectively, excluding the lid 8 in a state where the disc tray 1 is located at the disc discharge position.
[0017]
The disc tray 1 is formed with substantially elliptical reading holes 2 arranged in the longitudinal direction in a substantially central portion of a rectangular plate, and sets two types of discs (not shown) having different diameters. Two types of disk mounting portions 3 and 4 are provided on the upper surface. The disc set on any of the disc placement portions 3 and 4 is loaded with the disc that rises from below the reading hole 2 through the reading hole 2 when the disc tray 1 is positioned at the disc mounting position. The recording information is optically transmitted through the reading hole 2 by a well-known optical pickup (not shown) which is lifted and rotated above the disc tray 1 by a unit (not shown) and moves along the reading hole 2. Or read information. The disc tray 1 is slidably provided on the chassis 7, and a disc loading position (a), (c) where the disc can be played back or recorded, and a disc removal position (b), (d) are removed. Alternatively, it is reciprocated linearly between the exchangeable disc discharge position.
[0018]
An upper part of the chassis 7 is covered with a lid 8 to form a housing, and a front end portion of the housing (a lower end portion in (a) and (b) at a right end portion in (c) and (d)). The entrance / exit 9 of the disc tray 1 is open. Therefore, the disc tray 1 is moved in the disc loading direction A while passing through the inlet / outlet 9 and stored in the disc loading position inside the housing, and is moved toward the disc ejection direction B while passing through the inlet / outlet 9 to be the housing. It is designed to protrude to the disc ejection position outside the body. Since the above-described configuration is very well known, the illustration thereof is omitted.
[0019]
A single contact type tray position detection switch 10 is disposed near the entrance / exit 9 of the chassis 7 and close to the lower surface of the disk tray 1. A small trigger for pressing the contact actuator 10a of the tray position detection switch 10 for a predetermined interval immediately before reaching the disk mounting position is provided on the lower surface of the disk tray 1 along the transport direction facing the tray position detection switch 10. When the protrusion 11 reaches the disk ejection position, a large trigger protrusion 12 that continues to press the contact actuator 10a of the tray position detection switch 10 is provided.
[0020]
Therefore, the tray position detection switch 10 detects that the disk tray 1 is positioned at the disk mounting position by continuing to operate the contact actuator 10a in the on state with the trigger large protrusion 12, and the trigger small protrusion. 11, when the contact actuator 10 a is turned on after being turned on for a predetermined time, it is detected that the disc tray 1 has reached the disc ejection position. However, the tray detection switch 10 is turned on at the time when the trigger small protrusion 11 or the trigger large protrusion 12 is detected and only detects, for example, a high level detection signal. The detection signal of the tray position detection switch 10 is detected. The controller that will be described later detects the arrival position of the disc tray 1 based on the above.
[0021]
FIG. 2 is a block diagram showing an operation control system of the disk loading mechanism. The control unit 13 composed of 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. That is, the control unit 13 instructs the loading motor 18 to rotate in the forward direction or the reverse direction when the command signal by the operation of the tray operation switch 17 is input, and the loading motor 18 is driven. The disc tray transport mechanism 19 is operated to move the disc tray 1 in the disc ejection direction B or the disc loading direction A, and a detection signal is received from the tray position detection switch 20 shown in FIGS. When the input is made, the rotation of the loading motor 18 is stopped and the disk tray 1 is controlled to stop positioning. The disc tray 1 is stopped when the power is turned on, and control is performed to temporarily store the determination result in the memory 14, which will be described in detail later.
[0022]
The disc tray transporting mechanism 19 decelerates the rotation of the roving motor 18 and then converts it into the linear motion of the disc tray 1 and transmits it to the disc tray 1. This is a known configuration. The tray operation switch 17 is the same as the EJECT / IN switch generally provided in the conventional mechanism, and is simply turned on and off by a pressing operation and a pressing release, respectively. When a command signal for turning on the tray operation switch 17 is input, the disc tray 1 is controlled to move to a position opposite to the current position. This will be described in detail later.
[0023]
The control process of the control unit 13 in the disk loading mechanism will be described with reference to the timing chart of FIG. In FIG. 4, the control unit 13 determines whether the disk tray 1 is in the disk loading position or the disk when the power is turned on, based on whether the tray position detection switch 10 is on when the power is turned on (step S <b> 1). It is discriminated which position is positioned (step S2).
[0024]
That is, when the disk tray 1 is stopped at the disk mounting position shown in FIG. 1C, the tray position detection switch 10 is held in the ON state, while the disk tray 1 is held in FIG. The tray position detection switch 10 is held in the OFF state when the positioning is stopped at the disc discharge position shown in FIG. Thereby, in this disk loading mechanism, the position of the disk tray 1 can be immediately determined by whether the tray position detection switch 10 is turned on or off after the power is turned on. If the tray position detection switch 10 is on, the tray position information “disk tray 1 is stopped at the disk loading position” is stored in the memory 14 (step S3), while the tray position detection switch 10 If it is off, tray position information “disc tray 1 is stopped at the disc ejection position” is stored in memory 14 (step S4).
[0025]
On the other hand, conventionally, when determining the position of the disc tray when the tray operation switch is turned on, detection is performed based on the voltage application history of the tray position detection switch and the loading motor. In other words, the conventional tray position detection switch is turned on regardless of whether the disk tray is positioned at the disk loading position or the disk ejection position, so that the loading motor rotates in the disk ejection direction, for example, when the power is turned on. A drive voltage is applied for a certain period of time, and the position of the disk tray is specified from the change in the output of the tray position detection switch at that time. For this reason, not only does it take time to detect the position of the disk tray, but the loading tray may be subject to deterioration because it may be applied with a voltage for rotationally driving in a non-rotatable direction.
[0026]
Subsequently, the control unit 13 monitors whether the tray operation switch 17 is turned on (step S5), and at time t1 in FIG. 3, the tray operation switch 17 is turned on as shown in FIG. Is read out, the tray position information is read from the memory 14, and the loading motor 18 is driven and controlled to transport the disc tray 1 in the direction opposite to the tray stop position of the tray position information (step S6). . Immediately after instructing the driving of the loading motor 18, the control unit 13 is turned on by the trigger small protrusion 11 so that the tray position detection switch 10 is turned on along the moving direction of the disc tray 1 in the trigger small protrusion 11. It is determined whether or not a pulse having a predetermined pulse width P1 having a time length corresponding to the width has occurred (step S7). This is because when the disc tray 1 is conveyed from the disc ejection position toward the disc mounting position, the trigger small protrusion 11 is detected by the tray position detection switch 10 immediately after the disc tray 1 is conveyed, thereby detecting the tray position. This is to prevent the driving of the loading motor 18 from being stopped by a pulse having a predetermined pulse width P1 output from the switch 10.
[0027]
Now, as shown in FIG. 3C, the tray position detection switch 10 is in the on state at t1, and the loading motor 18 operates as shown in FIG. 3B of the tray operation switch 17 at t1. The disc tray 1 is rotated in the forward direction by the ON operation, and the disc tray 1 is conveyed from the disc loading position toward the disc ejection position. Therefore, the control unit 13 does not output a pulse having a predetermined pulse width P1 from the tray position detection switch 10 during the time from when the loading motor 18 is driven until the predetermined time elapses. 10 is determined to have only changed from the on state to the off state (step S7), and then the tray position detection switch 10 is turned on by the trigger projection 12 to output a pulse having a predetermined pulse width P1. It is monitored (step S8).
[0028]
Then, when it is determined that the pulse having the predetermined pulse width P1 is output at t2 in FIG. 3, the control unit 13 stops the driving of the loading motor 18 as shown in FIG. 3B (step S9). . As a result, the disk tray 1 is positioned and stopped at the disk discharge position shown in FIG. Thereafter, the control unit 13 updates the tray position information stored in the memory 14 as “the disk tray 1 is stopped at the disk discharge position” and stores it in the memory 14 (step S11). Subsequently, the control unit 13 returns to step S5 and then repeats the same control process as described above until it is determined that the power supply is cut off (step S12).
[0029]
When the control unit 13 determines that the tray operation switch 17 is turned on at time t3 in FIG. 3, the control unit 13 reads the tray position information from the memory 14, and transports the disc tray 1 in the direction opposite to the position of the tray position information. Thus, the loading motor 18 is driven and controlled (step S6). At this time, the memory 14 stores the above-described tray position information “the disk tray 1 is stopped at the disk discharge position”, so that the control unit 13 can load the loading motor as shown in FIG. 18 is rotated in the reverse direction to transport the disc tray 1 from the disc ejection position to the disc loading position. At this time, the control unit 13 detects that the pulse having the predetermined pulse width P1 is detected in the tray position during the time from when the loading motor 18 is driven until the predetermined time elapses. Although it is determined that the pulse is output from the switch 10 (step S7), this pulse is ignored, and next, the pulse position P2 having a pulse width P1 or larger is monitored to be output from the tray position detection switch 10 (step S7). Step S10).
[0030]
Then, at time t4 in FIG. 3, the control unit 13 turns on the tray position detection switch 10 and turns on the pulse width P2 that is equal to or greater than the predetermined pulse width P1 when the high-level signal output time exceeds the predetermined pulse width P1. It is determined that a pulse has been output, and at that time, as shown in FIG. 5B, the driving of the loading motor 18 is stopped (step S9). As a result, the disk tray 1 is positioned and stopped at the disk mounting position shown in FIG. Thereafter, the control unit 13 updates the tray position information as “the disk tray 1 is stopped at the disk loading position” and stores it in the memory 14 (step S11). Subsequently, the control unit 13 returns to step S5 until it is determined that the power source is cut off (step S12), and thereafter repeats the same control process as described above.
[0031]
In this disk loading mechanism, although only one single contact type tray position detection switch 10 is used, the protrusions 11 and 12 of the disk tray 1 for turning on the tray position detection switch 10 are connected to the disk. Since the discharge position and the disc mounting position have different shapes, the position of the disc tray 1 can be accurately detected. In addition, since the tray position detection switch 10 holds the disk tray 1 at the disk loading position in the ON state when it is detected and holds the disk tray 1 at the disk discharge position in the OFF state at the time of detection, the tray position detection switch 10 Depending on whether the position detection switch 10 is on or off, the stop position of the disc tray 1 can be determined immediately and accurately, and thereafter each time the tray operation switch 17 is turned on, There is no need to refer to the voltage application history to the loading motor 18.
[0032]
FIG. 5A is a schematic left side view showing a disk loading mechanism according to another embodiment of the present invention, in which the same or equivalent parts as those in FIG. is there. In this embodiment, a disk loading mechanism applied to a turret tray changer is shown. A turret type disk tray 20 having a turret (not shown) having a plurality of disk placement portions rotatably provided on the upper surface is freely accessible through a doorway 9 with respect to a housing composed of a chassis 7 and a lid 8. The disk mounting position accommodated in the housing, the first ejection position where the entire disk is pulled out of the housing, and the second ejection position where the half is pulled out of the housing The positioning is stopped.
[0033]
Therefore, on the lower surface of the turret type disc tray 20, in addition to the fact that the trigger small protrusion 11 and the trigger large protrusion 12 similar to those of the above-described embodiment are provided on both ends in the transport direction, Thus, two trigger small protrusions 11 are provided at predetermined intervals at an intermediate position. When the turret type disc tray 20 is transported from the mounting position shown in FIG. 6A toward the first discharge position, as shown in FIG. At t5 when the on-operation by 12 is released, the output of the tray position detection switch 10 becomes a low level, and when the turret disc tray 20 is pulled out to the second discharge position, the tray position detection switch 10 has two trigger bumps. When a turn-on operation is sequentially performed by the units 11 and 11, pulses having a predetermined pulse width are sequentially output at t6 and t7, and the tray position detection switch 10 is used as a trigger when the turret disc tray 20 is pulled out to the first discharge position. A pulse having a predetermined pulse width is output at t8 when the small protrusion 11 is turned on.
[0034]
Therefore, in the above-described disk loading mechanism, only one single contact type tray position detection switch 10 is used, but the protrusion 11 of the turret type disk tray 20 that turns on the tray position detection switch 10 is operated. , 12 have different shapes and are provided in a predetermined arrangement, the three positions of the turret disc tray 20 can be accurately detected. In addition, the tray position detection switch 10 holds the turret type disc tray 201 at the mounting position when it is detected, and turns off when the turret type disc tray 20 at the first discharge position is detected, as in the embodiment. Therefore, immediately after the power is turned on, the stop position of the turret tray 201 can be immediately and accurately determined depending on whether the tray position detection switch 10 is on or off.
[0035]
In each of the above-described embodiments, the tray position detection switch 10 is exemplified by the one that mechanically operates the single contact actuator 10a. However, as shown in FIG. The tray position detection switch 23 for optically detecting the trigger small protrusion 24 and the trigger large protrusion 27 provided on one side surface of the disk tray 1 by the portion 22 has been described in the above embodiments. The same effect can be obtained. Furthermore, although not shown, a reflective optical element made up of a light projecting / receiving element can also be used as a tray position detection switch. When such an optically detected tray position detection switch 23 is used, the contact operation over time is not deteriorated as in the case of the single contact type mechanical tray position detection switch 10, so that high reliability can be obtained over a long period of time. Sex can be secured.
[0036]
【The invention's effect】
As described above, according to the disk loading mechanism of the disk recording / reproducing apparatus of the present invention, the shape is different between the disk discharge position and the disk mounting position, while having an inexpensive configuration using only one tray position detection switch. Since the tray position detection switch is turned on by the trigger small protrusion or the trigger large protrusion on the disk tray, the position of the disk tray can be detected accurately and reliably. Moreover, since the tray position detection switch is kept on when one of the disk loading position or the disk ejection position is detected and is kept off when the other is detected, the tray position detection switch is turned on immediately after the power is turned on. Alternatively, the disc tray stop position can be determined immediately and accurately depending on the off state, and thereafter, every time the tray operation switch is turned on, the voltage application history to the loading motor as in the past. There is no need to refer to.
[Brief description of the drawings]
FIGS. 1A and 1C show a disk loading mechanism of a disk recording / reproducing apparatus according to an embodiment of the present invention, wherein FIGS. 1A and 1C exclude a lid in a state where a disk tray is positioned at a disk mounting position, respectively. The schematic plan view and the schematic cut left side view, (b) and (d) are the schematic plan view and the schematic cut left side view, respectively, excluding the lid in a state where the disc tray is located at the disc discharge position.
FIG. 2 is a block configuration diagram showing an operation control system of the embodiment.
FIG. 3 is a timing chart of the embodiment described above.
FIG. 4 is a flowchart showing a control process according to the embodiment.
5A and 5B show a disk loading mechanism of a disk recording / reproducing apparatus according to another embodiment of the present invention, in which FIG. 5A is a schematic right side view of cutting, and FIG. 5B is a waveform diagram showing an output of a tray position detection switch. is there.
FIG. 6 is a cut-out schematic right side view showing a disk loading mechanism of a disk recording / reproducing apparatus according to still another embodiment of the present invention.
[Explanation of symbols]
1,20 Disc tray
7 Chassis (housing)
9 Entrance
10, 23 Tray position detection switch
11, 24 Trigger small protrusion (trigger protrusion)
12, 27 Trigger large protrusion (trigger protrusion)
13 Control unit
17 Tray operation switch
18 Loading motor
19 Disc tray transport mechanism

Claims (4)

A disk tray on which a recording / reproducing medium disk is mounted and linearly movable between a disk loading position and a disk ejection position, a loading motor capable of forward and reverse rotation, and rotational power of the loading motor A tray conveying mechanism that converts the disk tray into a linear motion thereof and transmits the same; a tray position detection switch that detects the disk tray moved to the disk loading position and the disk ejection position and outputs a detection signal; When the tray operation switch is operated, the loading motor is driven to rotate so as to transport the disc tray in the direction opposite to the current position, and the loading signal is detected when a detection signal is input from the tray position detection signal. Disc recording / reproducing with a control unit for stopping the rotation of the motor In the disk loading mechanism of the location,
Only one of the tray position detection switches is disposed in the vicinity of the entrance / exit of the disk tray in the housing,
The disk tray is provided with a trigger large protrusion at a position detected by the tray position detection switch that has reached the disk loading position or the disk ejection position, and a length along the transport direction is the trigger length. A trigger small protrusion shorter than the large protrusion is disposed at a position detected by the tray position detection switch immediately before reaching the disk ejection position or the disk mounting position,
The control unit determines the stop position of the disc tray by turning on or off the tray position detection switch when power is turned on, and is opposite to the determined stop position when the tray operation switch is operated. A disk loading mechanism of a disk recording / reproducing apparatus, wherein the loading motor is rotationally controlled to convey the disk tray in a direction. A tray transport mechanism that is actuated by a loading motor capable of rotating in the forward and reverse directions to linearly move a disk tray on which a recording / reproducing medium disk is mounted between a disk mounting position and a disk discharging position;
A single tray position detection switch that is disposed at a location near the entrance / exit of the disc tray in the housing, detects the disc tray moved to the disc loading position and the disc ejection position, and outputs a detection signal;
When the tray operation switch is operated, the loading motor is controlled to rotate so as to transport the disc tray in the direction opposite to the current position, and when the detection signal is input from the tray position detection switch, A controller for stopping the driving of the loading motor,
In the disc tray, a trigger small projection and a trigger large projection having different lengths in the transport direction are detected by the tray position detection switch moved to the disc loading position and the disc ejection position. A disk loading mechanism of a disk recording / reproducing apparatus, wherein the disk loading mechanism is disposed at each position. 3. The trigger large protrusion is disposed at a position that is continuously detected by the tray position detection switch that has reached the disk mounting position or the disk discharge position, and the trigger small protrusion is a disk discharge. Disposed at a position detected by the tray position detection switch immediately before reaching the position or the disk mounting position,
The controller has a function of discriminating the stop position of the disc tray based on whether the tray position detection switch is on or off when the power is turned on and / or when the tray operation switch is operated. Device disk loading mechanism. In Claim 2 or 3, the disc tray is provided with a plurality of trigger protrusions having different lengths in the transport direction at three or more locations including the disc mounting position and the disc ejection position.
The control unit is a disk loading mechanism of a disk recording / reproducing apparatus that controls to stop driving the loading motor when the tray position detection switch detects the designated trigger protrusion.

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