JP4340909B2 - Disc player - Google Patents

Description

  The present invention relates to a disc player for reproducing and recording information recorded on a disc.

  Optical discs such as CDs and DVDs are used as storage media in disc players such as CD players and DVD players. In these disc players, a disc tray into which an optical disc is loaded is incorporated so as to be movable with respect to the main body case, the disc tray is pulled out of the main body case when the optical disc is attached or detached, and the disc tray is stored in the main case when used. Composed. For this reason, an exposure opening for exposing the disc tray to the outside of the main body case is formed on the front panel of the main body case.

  A large number of precision parts are incorporated inside the disc player, and if foreign matter or dust enters from the above-described exposure opening, it may break down. For this reason, when the disc tray is stored in the main body case, the exposure opening is shielded by the shutter. In general, the front surface of the disc tray is formed so as to coincide with the exposure opening, and the exposure opening is shielded by the front surface of the disc tray.

Moreover, in patent document 1, the opening and closing (exposed opening of this case) of the tray formed in the front panel is opened and closed by the first and second doors (shutter of this case), and the first and second doors are interlocked with the movement of the tray. There has been proposed a disk drive door device in which the first and second doors are opened and closed to open and close through the second roller and the first and second levers.
JP 2005-63642 A

  However, in Patent Document 1, since there is no mechanism for holding the first and second doors in the closed position, there is a problem that when the user presses the first and second doors, the first and second doors are opened. there were. Furthermore, there is a problem that the opening / closing mechanism of the first and second doors becomes complicated.

  The present invention has been made to solve the above-described problems, and provides a disc player capable of simplifying a shutter opening / closing mechanism by performing opening / closing operation of a shutter and holding in a closed position by a cam. With the goal.

In order to achieve the above object, a disc player according to the present invention includes a disc tray that moves between an exposed position that is exposed to the outside when a disc is attached and detached and a storage position that is accommodated inside when the disc is played back, and the disc tray. In a disc player comprising a moving means for moving the disc tray and a main body case formed with an exposure opening that allows the disc tray to be exposed to the outside, an open position that is provided inside the main body case and opens the exposure opening A shutter that opens and closes at a closed position that shields the exposure opening, a support member that supports the shutter so that it can be opened and closed, and an opening / closing means that has a displaceable cam that opens and closes the shutter, and for opening and closing the shutter An open / close switch for operating the open / close means in response to the open / close switch being operated, By displacing the arm to open and close the shutter, the cam is operated to open the open position the shutter from the closed position, and wherein the pivoting after moving the shutter at the rear. Examples of the disk include a CD and a DVD. Further, examples of the displacement of the cam include movement and rotation, but the cam is preferably rotatable. Furthermore, it is preferable that the opening / closing means has a displacement member, such as a motor, for displacing the cam.

  The cam preferably holds the shutter so that the shutter cannot be opened and closed when the shutter is in the closed position.

  Further, the apparatus includes shutter position detecting means for detecting the position of the shutter, and the moving means detects that the shutter is located at the open position by the shutter position detecting means when the opening / closing switch is operated. In response, it is preferable to move the disk tray.

  And a tray position detecting means for detecting the position of the disk tray, wherein the opening / closing means detects that the disk tray is located at the storage position by the tray position detecting means when the opening / closing switch is operated. In response to this, it is preferable to open and close the shutter.

Furthermore, it is preferable that the shutter has an insertion portion that is inserted into the exposure opening when the shutter is located at the closed position .

  According to the disc player of the present invention, the disc tray that moves between the exposed position exposed to the outside when the disc is attached and detached and the storage position that is accommodated inside when the disc is played back, the moving means that moves the disc tray, and the disc A main body case having an exposure opening that allows the tray to be exposed to the outside, a shutter that is provided inside the main body case and that opens and closes at an open position that opens the exposure opening and a closed position that blocks the exposure opening, and opens and closes the shutter And an opening / closing means having a displaceable cam for opening and closing the shutter, and an opening / closing switch operated to open / close the shutter, the opening / closing means responding to the operation of the opening / closing switch. Since the cam is displaced to open and close the shutter, the shutter can be opened and closed by the cam. The opening and closing mechanism can be simplified.

  Further, since the cam holds the shutter so that it cannot be opened and closed when the shutter is in the closed position, the shutter can be opened and closed even if the user presses the shutter from the closed position toward the open position. Absent.

  Furthermore, a shutter position detecting means for detecting the position of the shutter is provided, and the moving means responds to the fact that the shutter position detecting means detects that the shutter is in the open position when the open / close switch is operated, Since the disc tray is moved, the disc tray and the shutter do not come into contact even when the disc tray is moved.

  1 and 2 show the appearance of a CD player 2 which is an embodiment of a disc player using the present invention. The CD player 2 accesses a CD (disc) 3 and reproduces data recorded on the CD 3. Inside the main body case 4 of the CD player 2 is an optical pickup that irradiates a laser beam and accesses the CD 3, a spindle motor that rotates the CD 3, a chucking core, a disk tray 5 loaded with the CD 3, and the position of the disk tray 5 A known player unit 6 including a tray position detection sensor (tray position detection means) for detecting the above, a circuit board and the like is incorporated. The disc tray 5 has a recess corresponding to the outer diameter of the CD 3. When the CD 3 is loaded in accordance with the recess of the disc tray 5, the chucking core engages with the chuck hole 3 a of the CD 3 to hold the CD 3. .

  An exposure opening 7 for exposing the disc tray 5 to the outside is formed on the front surface of the main body case 4, and an opening / closing switch 9 for opening and closing the LCD 8 and the shutter 10 is provided below the exposure opening 7. . In addition, various switches such as a reproduction switch and a stop switch are provided around the LCD 8, and a plurality of switches including the opening / closing switch 9 is a control unit 25 that performs main control of the CD player 2 (see FIG. 4). It is connected to the.

  The disc tray 5 is provided so as to be movable between a storage position (see FIG. 1) stored inside the main body case 4 during CD3 reproduction and an exposed position (see FIG. 2) exposed outside the main body case 4. And is moved by a moving mechanism (not shown) including a motor or the like. When the disc tray 5 is moved, the open / close switch 9 is operated. As will be described in detail later, the disc tray 5 is moved in response to detecting that the shutter 10 is in the open position by operating the open / close switch 9. When the open / close switch 9 is operated when the disc tray 5 is in the storage position, the disc tray 5 moves to the exposed position, and when the open / close switch 9 is operated when the disc tray 5 is in the exposed position, the disc tray 5 Move to the storage position. The tray position detection sensor of the player unit 6 is connected to the control unit 25. When the disc tray 5 is positioned at the storage position, the storage signal is output. When the disc tray 5 is positioned at the exposure position, the exposure signal is output. Output to. In the present embodiment, the moving means for moving the disc tray 5 includes a moving mechanism and a control unit 25.

  As shown in FIGS. 3 and 4, a shutter 10 is disposed inside the main body case 4, and the shutter 10 has an open position that opens the exposure opening 7 and a shielding position that closes the exposure opening 7 (closed position). ) And can be opened and closed. The shutter 10 includes an insertion plate 11 that is inserted into the exposure opening 7 when positioned at the shielding position, and a substantially U-shaped opening / closing plate 12 that is fixed to the rear of the insertion plate 11. In the insertion plate 11, an insertion portion 11 b that substantially coincides with the outer periphery of the exposure opening 7 is formed on the outer base 11 a that is larger than the outer periphery of the exposure opening 7. A first right insertion pin 12a and a second right insertion pin 12b are attached to the right side surface of the opening / closing plate 12 in FIG. 3, and the first left insertion pin 12c and the second right insertion pin 12b are attached to the left side surface of the opening / closing plate 12 in FIG. A second left insertion pin 12d is attached.

  A right support plate (support member) 13 and a left support plate (support member) 14 for supporting the shutter 10 in a displaceable manner are attached inside the main body case 4. The right support plate 13 is formed with a first right insertion hole 13a for inserting the first right insertion pin 12a and a second right insertion hole 13b for inserting the second right insertion pin 12b. A right support pin 16 for rotatably supporting the right cam 15 is attached to the right support plate 13.

  The right cam 15 is formed in a disc shape, and is formed with a right cam hole 15a through which the first right insertion pin 12a is inserted, a right mounting hole 15b, and a right connecting boss 15c. A right connection hole 15d is formed in the right connection boss 15c, and the right connection hole 15d is formed in a substantially D shape. The right cam 15 is formed with a right cover convex portion 15e that covers the periphery of the right cam hole 15a. When the right cam 15 is attached to the right support plate 13, the right attachment hole 15b of the right cam 15 is inserted into the right support pin 16 so that the first right insertion pin 12a is inserted into the right cam hole 15a, and the washer. Are inserted into a groove formed at the tip of the right support pin 16. Thereby, the right cam 15 is attached to the right support plate 13 so that rotation is possible.

  The left support plate 14 is formed with a first left insertion hole 14a for inserting the first left insertion pin 12c and a second left insertion hole 14b for inserting the second left insertion pin 12d. A left support pin 18 for rotatably supporting the left gear cam 17 and a shaft pin 19 serving as a support shaft for the second gear 22 are attached to the left support plate 14.

  The left gear cam 17 is formed in a disk shape, and a gear is formed on the outer periphery. The left gear cam 17 is formed with a left cam hole 17a, a left mounting hole 17b, and a left connecting boss 17c through which the first left insertion pin 12c is inserted. A left connecting hole 17d is formed in the left connecting boss 17c, and the left connecting hole 17d is formed in a substantially D shape. The left gear cam 17 is formed with a left cover convex portion 17e covering the periphery of the left cam hole 17a, a first switch pressing boss 17f, and a second switch pressing boss 17g. When the left gear cam 17 is attached to the left support plate 14, the left support pin 18 is inserted through the left attachment hole 17b of the left gear cam 17 so that the first left insertion pin 12c is inserted into the left cam hole 17a, and the washer. Are inserted into a groove formed at the tip of the left support pin 18. Thereby, the left gear cam 17 is attached to the left support plate 14 so that rotation is possible.

  A shaft insertion hole 14c for inserting the motor shaft 23a of the motor 23, two motor attachment holes 14d for attaching the motor 23, and a shutter position detection switch (shutter position detection means) 24 are attached to the left support plate 14. For this purpose, a switch mounting hole 14e is formed.

  When the screw is tightened to the motor 23 via the motor attachment hole 14d, the motor 23 is attached to the left support plate 14. When the first gear 21 is press-fitted into the motor shaft 23a and the second gear 22 is rotatably attached to the shaft pin 19, the first gear 21 and the second gear 22 mesh with each other, and the second gear 22 and the left The gear of the gear cam 17 meshes. Accordingly, when the motor shaft 23a is rotated by driving the motor 23, the left gear cam 17 is rotated. Further, the gear outer periphery of the left gear cam 17 is formed larger than that of the first gear 21, the second gear 22 is formed of a two-stage gear, and the rotation of the left gear cam 17 is relative to the rotation of the motor shaft 23a. To moderately slow down. Thereby, the left gear cam 17 can be gently rotated.

  The shutter position detection switch 24 includes a switch base 24a and a rotating portion 24b that is rotatably attached to the switch base 24a. An attachment hole 24c is formed in the switch base 24a. The rotating part 24b is urged clockwise by a spring (not shown), and is further regulated so as not to be rotated clockwise from the position shown in FIGS. When the screw is screwed into the switch mounting hole 14e of the left support plate 14 through the mounting hole 24c, the shutter position detection switch 24 is mounted to the left support plate 14. The shutter position detection switch 24 is connected to a control unit 25 that performs the main control of the CD player 2, and controls the position signal (closed position signal, open position signal) that differs depending on the rotation position of the rotation unit 24b. To 25. Specifically, the closed position signal is output to the control unit 25 when the arm portion of the rotating unit 24b is inclined to the right side with respect to the vertical center line, and the open position signal is output to the control unit 25 when the arm unit is inclined to the left side. .

  The motor 23 is connected to a control unit 25 that performs main control of the CD player 2 via a motor driver, and the drive is controlled by the control unit 25. The control unit 25 drives the motor 23 according to an open / close signal input when the open / close switch 9 is operated. At this time, the control unit 25 determines the rotation direction of the motor shaft 23a according to the type of the position signal input from the shutter position detection switch 24. In the present embodiment, when a closed position signal indicating that the shutter 10 is closed is input from the shutter position detection switch 24, the motor shaft 23a is rotated in the direction A in FIG. When an open position signal indicating that the shutter 10 is open is input from the shutter position detection switch 24, the motor shaft 23a is rotated in the direction B in FIG. 4 so as to close the shutter 10. Has been.

  The right cam 15 and the left gear cam 17 are connected by a metal connecting shaft 27. The connecting shaft 27 has substantially D-shaped insertion portions 27a at both ends, and screw insertion recesses 27b are formed in the insertion portions 27a. When the insertion portion 27a is inserted into the right connection hole 15d of the right cam 15 and the left connection hole 17d of the left gear cam 17, and the screw is screwed into the screw tightening recess 27b, the right cam 15 and the left gear cam 17 are connected. . In addition, since the insertion part 27a, the right connection hole 15d, and the left connection hole 17d are formed in a substantially D shape, the connection shaft 27 does not idle. Thereby, the right cam 15 and the left gear cam 17 can always be connected in a regular positional relationship. Furthermore, since the connecting shaft 27 is made of a metal member, the connecting shaft 27 does not deform even when a twisting force is applied. As a result, the right cam 15 and the left gear cam 17 can always be connected in a regular positional relationship even more reliably.

  In the present embodiment, the opening / closing means for opening and closing the shutter 10 are the right support plate 13, the left support plate 14, the right cam 15, the left gear cam 17, the first gear 21, the second gear 22, the motor 23, the control unit 25, and the connection. A shaft 27 is provided.

  As shown in FIG. 5, the left cam hole 17a of the left gear cam 17 is formed in the left gear cam 17 as it goes counterclockwise from the position where the first left insertion pin 12c is inserted when the shutter 10 is located at the shielding position. It is formed so as to approach the left mounting hole 17b which is the center of rotation. The left cam hole 17a has an angle range AR1 formed concentrically with the left mounting hole 17b, an angle range AR2 formed at a center (CP1) different from the angle range AR1, and an angle range AR3 different from the angle range AR2. The center (CP2) is formed, and the angle range AR4 is formed concentrically with the left mounting hole 17b. The angle range AR1 is formed so that the left gear cam 17 does not rotate even when the shutter 10 is pressed. Thereby, when the shutter 10 is located in the shielding position, the shutter 10 is held indisplaceable. Similarly to the left gear cam 17, the right cam 15 is formed with a right cam hole 15a. The shape of the left cam hole 17a is appropriately changed according to the amount of displacement necessary to displace the shutter 10 between the open position and the shield position.

  6 and 7, when the shutter 10, the left gear cam 17, the first gear 21, the second gear 22, the motor 23, and the shutter position detection switch 24 are attached to the left support plate 14, first, the shutter 10 The first left insertion pin 12c and the second left insertion pin 12d of the opening / closing plate 12 are inserted into the first left insertion hole 14a and the second left insertion hole 14b, respectively (see FIG. 6A), and the shaft insertion hole 14c. Then, the screw is fastened to the motor 23 and the motor 23 is attached to the left support plate 14 (see FIG. 6B), and the first gear 21 is press-fitted into the motor shaft 23a (see FIG. 6C). .

  Next, the second gear 22 is pivotally attached to the shaft pin 19 (see FIG. 7A), and left to the left support pin 18 so that the first left insertion pin 12c is inserted into the left cam hole 17a. The left mounting hole 17b of the gear cam 17 is inserted, and the left gear cam 17 is rotatably mounted on the left support plate 14 (see FIG. 7B). In this state, the first gear 21 and the second gear 22 mesh with each other, and the second gear 22 and the gear of the left gear cam 17 mesh with each other. Then, the screw is screwed into the switch mounting hole 14e via the mounting hole 24c of the shutter position detection switch 24, the shutter position detection switch 24 is attached to the left support plate 14, and the right cam 15 and the left gear cam 17 are connected. It connects by the connection shaft 27 (refer FIG.7 (C)).

  8 and 9 show a process in which the shutter 10 is displaced from the shielding position to the open position. As shown in FIG. 8A, when the shutter 10 is located at the shielding position, the insertion portion 11b of the insertion plate 11 of the shutter 10 is inserted into the exposure opening 7, and the exposure opening 7 is shielded. Further, the rotating portion 24 b of the shutter position detection switch 24 is inclined to the right in FIG. 8 by the second switch pressing boss 17 g of the opening / closing plate 12, and a closed position signal is input from the shutter position detection switch 24 to the control unit 25. Has been. When the user operates the open / close switch 9, an open / close signal is input to the control unit 25. In response to the input of the opening / closing signal when the closing position signal is input, the control unit 25 drives the motor 23 to rotate the motor shaft 23a in the direction A in FIG. 8 and 9, the left support plate 14 and the shutter position detection switch 24 are shown in a simplified manner.

  When the motor shaft 23 a rotates in the direction A in FIG. 4, the left gear cam 17 rotates in the direction A in FIG. 8 via the first gear 21 and the second gear 22. As shown in FIG. 8B, when the first left insertion pin 12c is positioned in the angular range AR1 (see FIG. 5), the shutter 10 is not displaced even when the left gear cam 17 is rotated. Shielded.

  As shown in FIG. 9A, when the left gear cam 17 is rotated until the first left insertion pin 12c is positioned in the angle range AR2, the shutter 10 is moved backward (in FIG. 9) by the rotation of the left gear cam 17. Leftward), and the insertion portion 11b is detached from the exposure opening 7. As shown in FIG. 9B, when the left gear cam 17 is rotated until the first left insertion pin 12c is positioned in the angular range AR3, the shutter 10 is centered on the second left insertion pin 12d. 9 is rotated in the B direction. Then, when the left gear cam 17 is rotated until the first left insertion pin 12c is positioned in the angular range AR4, the exposure opening 7 is completely set so that the disc tray 5 can be exposed to the outside from the exposure opening 7. Opened. At this time, the rotation portion 24b of the shutter position detection switch 24 is inclined to the left in FIG. 9 by the first switch pressing boss 17f, and an open position signal is input from the shutter position detection switch 24 to the control portion 25. . Then, in response to the input of the open position signal from the shutter position detection switch 24, the control unit 25 drives a moving mechanism (not shown) to move the disk tray 5 to the exposed position (see FIG. 2). Move. In this state, the user attaches / detaches the CD 3.

  As shown in FIG. 9B, when the shutter 10 is located at the open position, the exposure opening 7 is opened, and an open position signal is input from the shutter position detection switch 24 to the control unit 25. When the user operates the open / close switch 9 in this state, an open / close signal is input to the control unit 25, and the control unit 25 responds to the input of the open / close signal when the open position signal is input. Then, the moving mechanism is driven to move the disc tray 5 to the storage position (see FIG. 1). When the disc tray 5 moves to the storage position, a storage signal is input from the tray position detection sensor to the control unit 25. In response to the input of the storage signal, the control unit 25 drives the motor 23 to rotate the motor shaft 23a in the direction B in FIG.

  When the motor shaft 23a rotates in the direction B in FIG. 4, the left gear cam 17 rotates in the direction B in FIGS. 8 and 9, and accordingly the shutter 10 is centered on the second left insertion pin 12d as shown in FIG. It is rotated in the middle A direction and then moved forward (right direction in FIGS. 8 and 9), and the insertion portion 11 b is inserted into the exposure opening 7. Thereby, the exposure opening 7 is shielded.

  The operation of the CD player 2 configured as described above will be described. When the shutter 10 is located at the shielding position, the shutter 10 is held by the left gear cam 17 so that it cannot be opened and closed. The user operates the open / close switch 9 when replacing the CD 3. When the open / close switch 9 is operated, the control unit 25 drives the motor 23 to displace the shutter 10 from the shield position to the open position. Thereafter, in response to the input of an open position signal indicating that the shutter 10 is in the open position from the shutter position detection switch 24, the control unit 25 drives a moving mechanism (not shown) to The tray 5 is moved from the storage position to the exposure position. In this state, the user exchanges CD3.

  Thus, when the shutter 10 is located at the shielding position, the shutter 10 is held unopenable by the left gear cam 17, so that the shutter 10 is not opened even when the user presses the shutter 10, and the exposure opening 7 is reliably shielded. Can be done. Further, since the shutter 10 can be opened and closed between the shielding position and the open position by the rotation of the left gear cam 17, the shutter 10 can be opened and closed with a simple configuration.

  Further, since the insertion portion 11b of the shutter 10 is inserted into the exposure opening 7, the exposure opening 7 can be tightly shielded, and foreign matter and dust can be reliably infiltrated into the CD player 2 from the exposure opening 7. Can be prevented.

  Further, when the shutter 10 is displaced from the shield position to the open position, the shutter 10 is moved after moving backward, so that the shutter 10 is displaced only between the shield position and the open position. The positional relationship between the exposure opening 7 and the shutter 10 can be made more precise than that to be made.

  Further, a shutter position detection switch 24 for determining the position of the shutter 10 is provided, and the control unit 25 responds to the fact that the shutter position detection switch 24 detects that the shutter 10 is in the open position. Since it is driven to start the movement of the disc tray 5, the disc tray 5 and the shutter 10 do not come into contact with each other.

  Further, a tray position detection sensor for detecting the position of the disk tray 5 is provided, and the control unit 25 detects that the disk tray 5 is positioned at the storage position by the tray position detection sensor when the shutter 10 is opened. In response, since the shutter 10 is closed, the disc tray 5 and the shutter 10 do not come into contact with each other.

  In the above embodiment, the right cam 15 and the left gear cam 17 are connected by the connecting shaft 27 and the rotation of the left gear cam 17 is transmitted to the right cam 15. However, the shutter 10 is rotated only by the left gear cam 17. However, the right cam 15 may be omitted.

  Further, in the above embodiment, the left gear cam 17 is rotated to displace the shutter 10, but the present invention is not limited to this, and the cam is movably provided, and the shutter 10 is displaced by the movement of the cam. It can be changed as appropriate.

  In the above embodiment, the shutter position detection switch 24 is provided and the position of the shutter 10 is detected based on the rotation position of the rotation unit 24b. However, the present invention is not limited to this, and the light having the light emitting unit and the light receiving unit is used. The position of the shutter 10 may be detected by a sensor, and can be changed as appropriate.

  Furthermore, in the above embodiment, the rotation of the motor 23 is transmitted to the left gear cam 17 via the first gear 21 and the second gear 22, but the number of gears provided between the motor 23 and the left gear cam 17 is as follows. It can be changed as appropriate.

  In the above embodiment, the CD player 2 has been described as an example of the disc player. However, the present invention is not limited to this and can be applied to, for example, a DVD player, a DVD recorder, and the like.

1 is an external perspective view of a disc player embodying the present invention. 1 is an external perspective view of a disc player with a disc tray exposed. FIG. It is a disassembled perspective view which shows a shutter, a right support plate, a right cam, a left gear cam, and a connection shaft. FIG. 4 is an exploded perspective view showing a shutter, a left support plate, a left gear cam, a first gear, a second gear, a motor, and a position detection switch. It is front sectional drawing which shows a left gear cam. It is a perspective view which shows a shutter, a left support plate, a 1st gear, and a motor. It is a perspective view showing a shutter, a left support plate, a left gear cam, a first gear, a second gear, a motor, and a position detection switch. It is a side view showing a shutter, a left support plate, a left gear cam, and a position detection switch in a state where an insertion portion of the shutter is inserted into the exposure opening. It is a side view showing a shutter, a left support plate, a left gear cam, and a position detection switch in a state where an insertion portion of the shutter is detached from the exposure opening.

Explanation of symbols

2 CD player (disc player)
3 CD (disc)
4 Body case 5 Disc tray 6 Player unit 7 Exposed opening 9 Open / close switch (operation switch)
DESCRIPTION OF SYMBOLS 10 Shutter 11 Insertion board 11a Base 11b Insertion part 12 Opening / closing board 12a First right insertion pin 12b Second right insertion pin 12c First left insertion pin 12d Second left insertion pin 13 Right support plate (support member)
13a First right insertion hole 13b Second right insertion hole 14 Left support plate (support member)
14a First left insertion hole 14b Second left insertion hole 15 Right cam 15a Right cam hole 17 Left gear cam 17a Left cam hole 17f First switch pressing boss 17g Second switch pressing boss 21 First gear 22 Second gear 23 Motor 24 Shutter Position detection switch (shutter position detection means)
24b Rotating part 25 Control part

Claims (5)

A disk tray that moves between an exposed position that is exposed to the outside when the disk is attached and detached and a storage position that is housed inside when the disk is played, a moving means that moves the disk tray, and the disk tray can be exposed to the outside In a disc player comprising a main body case in which an exposure opening is formed,
A shutter that is provided inside the main body case and opens and closes at an open position that opens the exposure opening and a closed position that blocks the exposure opening;
A support member that supports the shutter in an openable / closable manner, and an opening / closing means having a displaceable cam that opens and closes the shutter;
An open / close switch operated to open and close the shutter,
In response to the opening / closing switch being operated, the opening / closing means displaces the cam to open / close the shutter ,
The disc player is characterized in that, when the shutter is opened from the closed position to the open position, the cam is rotated after the shutter is moved backward .   2. The disc player according to claim 1, wherein the cam holds the shutter so that the shutter cannot be opened and closed when the shutter is in the closed position. Shutter position detecting means for detecting the position of the shutter;
The moving means moves the disk tray in response to the shutter position detecting means detecting that the shutter is located in the open position when the open / close switch is operated. The disc player according to claim 1 or 2. Tray position detection means for detecting the position of the disk tray,
When the opening / closing switch is operated, the opening / closing means opens / closes the shutter in response to the tray position detecting means detecting that the disk tray is located at the storage position. The disc player according to any one of claims 1 to 3.   5. The disc player according to claim 1, wherein the shutter has an insertion portion that is inserted into the exposure opening when the shutter is located at the closed position.

Images