JPH0636537A - Opening and closing device for disk door - Google Patents

Abstract

PURPOSE:To facilitate the inserting and withdrawing operation of a compact disk when a door is fully opened and also to improve a sense of beauty in such constitution that the rotation of the compact disk due to inertia is stopped in the midst of opening the door and afterward the door is fully opened. CONSTITUTION:A side part of the door 34 is provided with 1st and 2nd restraining pieces 61 and 62, and in relation to this, a main body 30 on the side opposite to the compact disk 33 is provided with 1st and 2nd restraining claw members 44 and 45. Under the fully closed state of the door 34, the 1st restraining claw member 44 is restrained at the 1st restraining piece 61, and upon pressing operation of a push button from a 1st position to a 2nd position, the 1st restraining claw member 44 is separated from the 1st restraining piece 61. Moreover, the 2nd restraining claw member 45 is restrained at the 2nd restraining piece 62, and the door 34 is brought under its slightly opening state, and at this time, a motor 31 is stopped, and afterward, the push button 41 is restored to the 1st position by releasing the pressing operation of the push button 41. Consequently, the 2nd restraining claw member 45 is separated from the 2nd restraining piece 62 so that the fully opening state takes place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc door opening / closing device which can be suitably implemented in connection with a compact disc reproducing device or the like.

[0002]

2. Description of the Related Art In a compact disc reproducing apparatus, which is a so-called CD radio cassette player, there is a door open type shown in FIG. 15 for taking out the compact disc. Compact disc 2 in main body 1
Is driven to rotate about a vertical axis by a motor 3, and with the door 4 closed as shown in FIG. 15, a clamper 5 provided on the door 4 rotates the compact disk 2 by pressing it onto the turntable 8. To do. When the door 4 is closed, electric power can be supplied to the motor 3, and when the door 4 is opened in the direction of arrow 6 as shown in FIG. 3 is not supplied with power and the compact disc 2 is stopped.

A simplified plan view of the prior art shown in FIGS. 15 and 16 is shown in FIG. 17, in which a push button 9 which is pressed by the operator to open the door 4 is provided. By pressing the push button 9,
The pawl 10 shown in FIG. 8 is displaced in the direction of the arrow 11, and is disengaged from the locking hole 13 of the locking piece 12 formed in the door 4, so that the door 4 is as described with reference to FIG. Open to.

In the prior art shown in FIGS. 15 to 18, after the door 4 is opened in the direction of arrow 6, the compact disc 2 continues to rotate for a while due to the inertia of the compact disc 2. . Therefore, with the door 4 open, the operator may put his or her hand in contact with the compact disc 2 as indicated by the arrow 7, and by touching the compact disc 2 in this way, The compact disc 2 may be damaged. Further, when such a door 4 is opened, the compact disc 2 continues to rotate for a while, and the clamper 5 nevertheless separates above the compact disc 2, so that the compact disc 2 is turned on.
There is a risk that it will come off and fly out, which may damage the compact disc 2.

Another prior art for solving the problems in the prior art shown in FIGS. 15 to 18 and enabling the door 4 to be opened after the rotation of the turntable 2 is reliably stopped. Is shown in FIG. This FIG.
The prior art of is similar to the above-mentioned prior art, and corresponding parts bear the same reference numerals. The push operating portion 14 of the push button 9 is
The pressed portion 16 of the locking claw member 15 can be pressed. The locking claw member 15 has a first locking claw 17 and a second locking claw 18, and the door 4 has these locking claws 17,
A locking piece 20 having a locking hole 19 for locking 18 is fixed. The door 4 can be angularly displaced about a rotation axis parallel to the paper surface of FIG. 19, and a spring force is applied to the door 4 in a direction of opening the door 4.

When the door 4 is closed without pressing the push button 9, the clamper 5 rotatably mounted on the door 4 is
The compact disc 2 on the turntable 8 is pressed. At this time, as also shown in FIG.
The first locking claw 17 fits into the locking hole 19 of the locking piece 20 and locks.

When the push button 9 is pressed with the finger 21 to open the door 4, the locking claw member 15 is angularly displaced about the axis of the pin 22 in the direction of the arrow 23, and as a result, as shown in FIG. The first locking claw 17 disengages from the locking hole 19, and at the same time, the second locking claw 18 fits into the locking hole 19 and locks. In this way, the door 4 is angularly displaced as indicated by reference numeral d1 in FIG. 21, and the door 4 is slightly opened.
In this state, the power supply to the motor 3 that drives the turntable 8 is cut off. Therefore, the compact disc 2 stops rotating in the state shown in FIG. Thus, the compact disc 2 is moved to the door 4 as shown in FIG.
After stopping in a so-called half-open state, the finger 21 is released from the push button 9 as shown in FIG. As a result, the locking claw member 15 is angularly displaced around the pin 22 as indicated by an arrow 24, and the second locking claw 18 is disengaged from the locking hole 19. Thus, the door 4 is angularly displaced in the direction of the arrow 25, and the door 4 is opened. Therefore, when the door 4 is open, the compact disc 2 is already stopped, and therefore the operator's hand comes into contact with the compact disc 2 which is rotating by such inertial force, or the compact disc 2 is It is possible to prevent jumping out while rotating.

[0008]

The prior art shown in FIGS. 19 to 22 has a new problem. The problem with this prior art is that the second locking claw 18 for making the door 4 half open as shown in FIG. 21 inserts the compact disk 2 side with respect to the locking piece 20, that is, the compact disk 2. It is provided on the side. Therefore, when the compact disc 2 is mounted on the turntable 8 with the door 4 opened, the second locking claw 18 becomes an obstacle, or when the compact disc 2 is taken out from the turntable 8, The second locking claw 18 gets in the way. Further, in order to prevent the second locking claw 18 from deteriorating the aesthetics and to prevent the second locking claw 18 from being destroyed by an external force, a protector which is a cover for covering the second locking claw 18 is required. . Therefore, such a second locking claw 18 is not provided on the compact disc 2 side, and like the first locking claw 17,
It is preferably provided on the main body 1 side.

It is an object of the present invention to provide a disc door opening / closing device in which a door can be opened while a disc such as a compact disc stops rotating and the disc can be easily inserted and removed. is there.

[0010]

DISCLOSURE OF THE INVENTION The present invention provides a disc door opening / closing device in which a door is swingably provided in a main body for accommodating a rotationally driven disc, and the main body is provided at one side of the door. A push button that is provided and has a pair of first and second pressing operation portions, a pair of first and second locking claw members that are angularly displaceable on the main body at the one side of the door, and the door A pair of first and second members provided on one side portion, which can be locked / disengaged with the first and second locking claw members, respectively.
In the first position where the push button is not pressed, the first locking claw member is locked to the first locking piece and includes the locking piece and the disk drive switch whose switching state changes depending on the opening / closing state of the door. The door is closed, the switch is in a switching state capable of driving the disc, and when the push button is pressed to the predetermined second position, the first locking claw member is disengaged from the first locking piece. And the second locking claw member is the second
As the door is angularly displaced by being locked by the locking piece, the switching state of the switch is changed, the drive of the disk is stopped, and the push button returns from the second position to the first position.
Opening and closing of the disk door, characterized in that the second locking claw member is disengaged from the second locking piece, the disk door is opened, and the switching state of the switch is such that the driving of the disk remains stopped. It is a device.

The first and second locking claw members of the present invention are characterized in that they can be angularly displaced about an axis perpendicular to the pressing displacement direction of the push button.

The first locking claw member of the present invention is provided so as to be angularly displaceable around an axis perpendicular to the pressing displacement direction of the push button, and the second locking claw member is parallel to the pressing displacement direction of the push button. It is characterized in that the cam mechanism is provided so as to be angularly displaceable around and is angularly displaced by the second pressing operation portion.

[0013]

According to the present invention, the disk is housed in the main body of a CD player such as a CD radio cassette player so as to be rotationally driven, and the door can be swung to open and close. In the state where the door is closed and the push button is not pressed, the push button is in the first position, and the first locking claw member provided on the main body at one side of the door is a side closer to the one side of the door. The door is closed by being locked to the first locking piece provided in the section, and at this time, the switch is in a switching state capable of driving the disk, and performs the disk reproducing operation as described above. It is possible.

When the push button is pressed to a predetermined second position, the first locking claw member is disengaged from the first locking piece, and at this time, the second locking claw member is locked to the second locking piece. , The door is angularly displaced, and thus the door is in a so-called half-open state. At this time, the switching state of the switch is changed and the drive of the disk is stopped, so that the disk is stopped with the door half-opened.

After that, by releasing the pressing operation of the push button, the push button returns from the second position to the first position, so that the second locking claw member is disengaged from the second locking piece. As a result, the door is fully opened. The switching state of the switch is kept in a state where the drive of the disk is stopped. In this way, when the disc such as the compact disc is completely stopped, the door is fully opened. Therefore, there is no possibility that the operator's hand touches the rotating disc, and the compact disc does not pop out when the door is opened.

Further in accordance with the present invention, the first and second locking claw members are both provided on the main body on the one side of the door, in other words, on the side portion of the door. Since the first and second locking pieces are provided on the side opposite to the disk, it is easy to insert and remove the compact disk when the door is fully opened. The members do not compromise the aesthetics of the door when it is fully open and obviate the need for the aforementioned prior art protectors to cover such first and second locking members.

According to the present invention, the first and second locking claw members may be provided so as to be angularly displaceable in a lever-like manner about an axis perpendicular to the pressing displacement direction of the push button, or alternatively, the first The locking claw member is provided in such a lever shape,
The other second locking member may form a cam mechanism.

[0018]

1 is a sectional view of a compact disc reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a simplified plan view thereof. This compact disc reproducing device can be used, for example, as a so-called CD radio cassette player,
A turntable 32 is rotationally driven around a vertical axis by a motor 31 provided in the main body 30, and a compact disc 33 thereon is pressed by a clamper 35 rotatably provided on a closed door 34, In this way, the reading operation of the compact disc 33 is performed. The door 34 is angularly displaceable in the direction of the arrow 37 around a pin 36 provided on the body 30, and the torsion spring 38 exerts a spring force on the door 34 in the opening direction 37. A drive piece 39 is integrally attached to the door 34, and the switch 40 attached to the main body 30 is pressed by the drive piece 39 to be electrically connected. In this way, the electric power from the power source is applied to the motor 31 via the switch 40, and the motor 3
The turntable 32, and therefore the compact disc 33, can be driven to rotate.

A push button 41 for opening the door 34 is provided on the main body 30 at one side of the door 34 (left side of FIG. 1, front side of FIG. 2). As shown in FIG. 3, the push button 41 has a pair of a first pressing operation portion 42 and a second pressing operation portion 43 that hang down. The main body 30 has a first locking claw member 44 which is angularly displaceable on one side of the door 34 (left side in FIG. 1, front side in FIG. 2).
And the second locking claw member 45 is provided. The first locking claw member 44 has a horizontal axis 46, and the first pressing operation portion 42 of the push button 41 presses the pressed portion 47 downward in FIG. 3 against the spring force of the spring 48. , And is angularly displaced as indicated by arrow 49. The first locking claw member 44 is the first
It has a locking claw 50.

The second locking claw member 45 is provided on the main body 30 so as to be angularly displaceable by a horizontal pin 51, has a pressed portion 52 to be pressed by the second pressing operation portion 43 of the push button 41, and has a spring 53. It can be angularly displaced in the direction of arrow 54 against the spring force of. The second locking claw member 45 has a second locking claw 55.

As is apparent from FIG. 1, the first part of the push button 41 is
With respect to the second pressing operation portions 42 and 43, the pins 46 and 51 of the first and second locking claw members 44 and 45 are arranged on the left and right in FIG. 1, and therefore the first and second pressing operations of the push button 41 are performed. Angular displacement direction 4 of the locking claw members 44, 45
9 and 54 are in mutually opposite directions. The axis of the pin 46 of the first locking claw member 44 and the axis of the pin 51 of the second locking claw member 45 are perpendicular to the pressing displacement direction 68 of the push button 41.

FIG. 4 is a sectional view of the vicinity of the push button 41. An elastic member 58 such as a sponge or a spring is interposed between the push button pressing piece 56 of the main body 30 and the pressing operation portion 57 of the push button 41, and a spring force is applied so that the push button 41 is displaced upward. There is.

The first and second locking pieces 61, 6 are provided on the side portion of the door 34 near the one side (the left side in FIG. 1, the front side in FIG. 2).
2 are provided respectively. In this embodiment, the first and second locking pieces 61, 62 are constituted by members having one continuous through hole 63.

In the first position shown in FIG. 1 in which the door 34 is closed and the push button 41 is not pressed, the first locking claw member 4 is placed.
The first locking claw 50 of No. 4 is locked to the first locking piece 61, and
The door is closed in this state. The switch 40 is pressed by the driving piece 39 to be in conduction, and thus the compact disc 33 by the motor 31 is brought into conduction.
It is in a state where it can be rotationally driven. In order to open the door 34, the push button 41 is moved to the second position which is predetermined in FIG.
By the pressing operation against the spring force of 8, the first pressing operation portion 42 of the push button 41 presses the pressed portion 47 of the first locking claw member 44, and the first locking claw member 44. Is angularly displaced in the counterclockwise direction in FIG. 5 around the pin 46 as indicated by the arrow 49, whereby the first locking claw 50 is disengaged from the first locking piece 61. At this time, the second pressing operation portion 43 of the push button 41 is pressed against the pressed portion 5 of the second locking claw member 45.
The second locking claw 55 is locked to the second locking piece 62 by pressing 2. Therefore, the door 34 is angularly displaced by the spring force of the torsion spring 38 so that the side portion of the door 34 is raised by the distance d2 as indicated by reference numeral 37, and is in a half-open state, so to speak. As a result, the driving piece 39 does not press the switch 40, and the switch 40 is cut off. Therefore, even if electric power is not supplied to the motor 31 and the motor 31 drives the compact disc 33 with the door 34 closed, the motor shown in FIG.
In the half-opened state shown in, the electric power is not supplied to the motor 31 and the compact disc 33 is stopped.

After the compact disc 33 has stopped rotating due to inertia in this way, the operator stops the pressing operation of the push button 41 and releases the finger from the push button 41, so that the push button 41 is moved from the second position shown in FIG. The spring force of the elastic member 58 returns to the first position. As a result, the second locking claw 55 of the second locking claw member 45 separates from the second locking piece 62. In this way, the door 34 is further opened in the direction of the arrow 37 by the spring force of the spring 38 to be in the fully opened state. At this time, the switch 40 is not pressed by the driving piece 39, and the switch 40 is kept cut off.

The first and second locking claw members 44 and 45 are
As is apparent from FIG. 1, the first and second locking pieces 61, 62
Is located on the side opposite to the compact disc 33, that is, on the left side in FIG. 1, so that when the door 34 is in the fully opened state as indicated by reference numeral 34a, the compact disc 3
3 can be easily taken out, and the compact disc 33
Is easy to insert and mount into the turntable 32, and the first and second locking claw members 44 and 45 do not get in the way.

FIG. 6 is a side sectional view of another embodiment of the present invention, and FIG. 7 is an exploded perspective view thereof. This embodiment is similar to the previous embodiment, and the corresponding parts bear the same reference numerals. Particularly, in this embodiment, the push button 41 is provided with another second pressing operation portion 71 in addition to the first pressing operation portion 42.
Is inclined outward as it goes upward with respect to the pressing direction 68. The first locking claw member 44 has the same configuration as that of the above-described embodiment. The other second locking member 72 has a cam surface 73 for forming a cam mechanism that is angularly displaced by the second pressing operation portion 71. The second locking claw member 72 is
It is provided on the main body 30 so as to be angularly displaceable by a pin 74 having an axis parallel to the pressing displacement direction 68 of the push button 41.
The torsion spring 75 applies a spring force in the opposite direction of the arrow 76 (see FIG. 7). The second locking claw 77 of the second locking claw member 72 can be inserted and locked in the second locking claw 62 formed in the door 34, or can be released to release the locking. be able to. The other structure is the same as that of the above-mentioned embodiment.

FIGS. 8 and 9 show a state in which the door 34 is closed and the compact disc 33 is rotationally driven by the motor 31 and can be reproduced in the embodiment shown in FIGS. 6 and 7. 8 is a cross-sectional view of the push button 41 and its vicinity seen from the right side of FIG. 6, and FIG.
FIG. 7 is a simplified plan view of 1 and its vicinity as seen from above in FIG. 6. The push button 41 is in the first position where it is not pressed, and at this time, the first locking claw member 44 is locked by the spring force of the spring 48 by the first locking claw 50 to the first locking piece 61. Has become. The switch 40 is pressed by a drive piece 39 attached to the door 34 and is in a conductive state. Second locking claw 7 of second locking claw member 72
7 is a second locking piece 62 as shown clearly in FIG.
It is in the state of having left.

10 to 12 show a state in which the push operation portion 57 of the push button 41 is pushed with the finger 78 in the direction of the arrow 68. FIG. 10 is a sectional view of the push button 41 seen from the right side in FIG. 6, and FIG. 12 is a simplified plan view of the vicinity of the push button 41 seen from above in FIG. In the first pressing operation part 42 of the push button 41, the pressed part 47 of the first locking claw member 44 is pressed down against the spring force of the spring 48, so that the first locking claw 50 has the first locking piece. Leave from 61. At this time, the second locking claw 71 presses the cam surface 73 of the second locking claw member 72, which causes the second locking claw member 72 to resist the spring force of the torsion spring 75 around the pin 74. Arrow 7
It is angularly displaced in the direction of 6, and the second locking claw 77 is fitted into the second locking piece 62 and locked. This causes the door 34 to resist the spring force of the spring 38, as shown in FIG.
As shown by the arrow 37, the door 34 rises and is angularly displaced around 6, and the door 34 is in a so-called half-open state. In this way, when the push button 41 is pressed to the second position in FIG. 10, the drive piece 39 attached to the door 34 is not connected to the switch 4
The pressing of 0 is released, whereby the switch 40 is turned off, the electric power is not supplied to the motor 31, and the compact disc 33 is stopped. Thus, when the door 34 is in the half-opened state, the compact disc 33 stops rotating due to its inertia.

Next, as shown in FIGS. 13 and 14, by releasing the finger 78 from the push button 41, the push button 41
As shown in FIG. 13, from the second position of FIG.
Return to the second position as shown in FIGS. 8 and 9. As a result, the first locking claw member 44 is angularly displaced in the opposite direction of the arrow 49 (see FIG. 7) against the spring force of the spring 48, and returns.
At the same time, the second locking claw member 72 returns in the direction opposite to the arrow 76 by the action of the torsion spring 75. 13 is a sectional view of the push button 41 in that state as seen from the right in FIG. 6, and FIG. 14 is a simplified plan view of the vicinity of the push button 41 as seen from above in FIG. The door 34 is angularly displaced by the action of the spring 38 so as to be fully opened, and therefore the stopped compact disc 33 can be taken out and a new compact disc 33 can be mounted on the turntable 32.

The present invention is not limited to compact discs,
It can be widely implemented in connection with a disc which is another disk-shaped recording medium.

[0032]

As described above, according to the present invention, when the push button is in the first position where the push button is not pressed, the first locking member is locked to the first locking piece provided on the side portion of the door. The door is closed and the switch is in a switching state in which the disc can be driven. Therefore, the disc can be rotationally driven by a motor or the like for reproduction.

In order to open the door, first, the push button is pressed to the second position, whereby the first locking claw member is disengaged from the first locking piece, and at this time, the second locking claw member is moved to the second engagement position. The door is in a half-opened state as it is engaged with the stopper and angularly displaced, and at this time, the switching state of the switch changes and the drive of the disk is stopped. Therefore, there is no risk that the operator's hand will come into contact with the disk while it is rotating due to inertia, or the disk will jump out, and damage to the disk can be prevented.

Next, by returning the push button from the second position to the first position, the second locking claw member is disengaged from the second locking piece and the door is fully opened. The drive remains stopped, and the door is fully opened when the disc is completely stopped.

The first and second locking claw members are arranged on the side opposite to the disc with respect to the first and second locking pieces provided on the door, and therefore the disc is fully opened. Can be easily inserted and removed, and the first and second locking claw members do not interfere. Further, the first and second locking claw members do not impair the aesthetic sense, and it is not necessary to provide the protector or the like related to the above-mentioned prior art in order to prevent damage due to external force.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

2 is a simplified plan view of the embodiment shown in FIG.

3 is an exploded perspective view showing a part of the embodiment shown in FIGS. 1 and 2. FIG.

FIG. 4 is a simplified cross-sectional view near a push button 41.

5 is a cross-sectional view showing a configuration in which the door 34 in the embodiment shown in FIGS. 1 to 4 is in a so-called half-opened state during opening.

FIG. 6 is a sectional view of another embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a partial configuration of the embodiment shown in FIG.

8 is a cross-sectional view of the vicinity of the push button 41 when the door 34 is fully closed in the embodiment shown in FIGS. 6 and 7, as viewed from the right side of FIG.

9 is a simplified plan view of the vicinity of the push button 41 when the door 34 is fully closed as shown in FIG.

FIG. 10 is a view showing the door 3 in the embodiment shown in FIGS.
FIG. 7 is a cross-sectional view of the vicinity of the push button 41 when the 4 is in a so-called half-opened state, as viewed from the right side of FIG. 6.

FIG. 11 is a simplified side view of the configuration when the door is in the half-opened state in the state shown in FIG. 10, as seen from a section line in a direction perpendicular to the paper surface of FIG.

FIG. 12 is a simplified plan view around the push button 41 in FIGS. 10 and 11.

FIG. 13 is a door 3 in the embodiment shown in FIGS.
7 is a sectional view of the vicinity of the push button 41 when viewed from the right side in FIG.

14 is a simplified plan view of the vicinity of the push button 41 when the door 34 shown in FIG. 13 is in a fully opened state.

FIG. 15 is a cross-sectional view of the prior art.

16 is a cross-sectional view of the prior art door 4 shown in FIG. 15 in a fully opened state.

FIG. 17 is a simplified plan view of the prior art shown in FIGS. 15 and 16.

FIG. 18 is a cross-sectional view showing a part of the configuration of the prior art shown in FIGS. 15 to 17 when the door 4 is in the fully closed state.

FIG. 19 is a cross-sectional view of another prior art.

20 is a cross-sectional view showing a state where the door 4 in the prior art shown in FIG. 19 is in a fully closed state.

FIG. 21 is a cross-sectional view showing a configuration when the door 4 is in a so-called half-opened state in the prior art shown in FIGS. 19 and 20.

FIG. 22 is a cross-sectional view showing a state when the door 4 is fully opened in the prior art shown in FIGS. 19 to 21.

[Explanation of symbols]

 30 Main Body 31 Motor 32 Turntable 33 Compact Disc 34 Door 35 Clamper 36 Pin 38 Torsion Spring 39 Driving Piece 40 Switch 41 Push Button 42 First Pressing Actuator 43 Second Pressing Actuator 44 First Locking Claw Member 45 Second Locking Claw member 46,51 Pin 47,52 Pressed portion 48,53 Spring 50 First locking claw 55 Second locking claw 58 Elastomeric member 61 First locking piece 62 Second locking piece 71 First locking claw Member 72 Second locking claw member 73 Cam surface 74 Pin 75 Torsion spring

Claims (3)

[Claims] 1. A disc door opening / closing device in which a door swingably opens and closes in a main body for accommodating a rotationally driven disc, wherein a pair of first and second doors are provided on the main body at one side of the door. A push button having a second pressing operation portion, a pair of first and second locking claw members provided on the main body so as to be angularly displaceable on the one side of the door, and on a side portion of the door on the one side side. Provided, first and second
A first position in which a push button is not pressed, including a pair of first and second locking pieces that can be locked / released on / from the locking claw member, and a disk drive switch whose switching state changes depending on whether the door is open or closed. Then, the first locking claw member is locked to the first locking piece, the door is closed, the switch is in a switching state capable of driving the disk, and the push button is pressed to a predetermined second position. In the state of
The first locking claw member is disengaged from the first locking piece, the second locking claw member is locked to the second locking piece, and the door is angularly displaced, thereby changing the switching state of the switch. The drive of the disk is stopped, and the push button returns from the second position to the first position, whereby the second locking claw member is disengaged from the second locking piece, the disk door is opened, and the switch is in the switching state. Is
A disc door opening / closing device characterized in that the drive of the disc remains stopped. 2. The opening / closing device for a disk door according to claim 1, wherein the first and second locking claw members are angularly displaceable around an axis perpendicular to the pressing displacement direction of the push button. 3. The first locking claw member is provided so as to be angularly displaceable around an axis line perpendicular to the pressing displacement direction of the push button, and the second locking claw member is arranged around an axis line parallel to the pressing displacement direction of the push button. 2. The disc door opening / closing apparatus according to claim 1, wherein the cam mechanism is provided so as to be capable of being angularly displaced and is angularly displaced by the second pressing operation portion.