JP3591008B2 - Cartridge ejection device and recording and / or reproducing device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a cartridge ejecting apparatus for an apparatus for recording and reproducing a recording medium contained in a disk cartridge such as an optical disk such as a mini disk.And records and / Or playback deviceIt is about.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, a cartridge ejection device of a magneto-optical disk device is configured as shown in, for example, FIGS.
That is, in FIGS. 12 and 13, the cartridge ejection device 1 includes a mechanical chassis 2 fixedly disposed, a cartridge holder 3 instructed to be swingable with respect to the mechanical chassis 2, and an open position of the cartridge holder 3. And an eject plate 5 for ejecting the cartridge 4 housed in the cartridge holder 3.
[0003]
The mechanical chassis 2 is fixedly arranged in a case of a magneto-optical disk drive (not shown). A drive device for rotating and driving the magneto-optical disk and an optical pickup for recording and / or reproducing on the magneto-optical disk are provided directly or indirectly on the mechanical chassis 2. I have.
[0004]
As shown in FIG. 13, the cartridge holder 3 is formed in a flat box shape having an open lower end, and a cartridge 4 containing a magneto-optical disk is inserted from the open end. I have. Further, the cartridge holder 3 includes a shaft portion 3a formed so as to protrude laterally outward from the vicinity of the upper end in FIG.
[0005]
As a result, when the shaft portion 3a is fitted into the shaft holes 2a provided on both sides near the upper end of the mechanical chassis 2, the cartridge holder 3 moves from the closed position indicated by the solid line to the dotted line with respect to the mechanical chassis 2. Is swingably supported around the shaft portion 3a up to the open position indicated by. The cartridge holder 3 is connected to an outer lid (not shown), and swings between an open position and a closed position in conjunction with opening and closing of the outer lid.
[0006]
When the cartridge holder 3 is moved to the closed position indicated by the solid line as shown in FIG. 13, the reference shaft 2b implanted on the mechanical chassis 2 is engaged with the engagement hole 3b provided in the cartridge holder 3. The recording and / or reproduction of the magneto-optical disk housed in the cartridge 4 is accurately performed with respect to the mechanical chassis 2 by being fitted to the mechanical chassis 2.
[0007]
The eject plate 5 is formed of a rigid material, and is swingably supported near a top end of the mechanical chassis 2 around a rotation axis 5a perpendicular to the mechanical chassis 2 as shown in FIG. And a free end extends into the vicinity of the upper end of the cartridge holder 3. Thus, the eject plate 5 swings from the retracted position shown by the solid line to the discharge position shown by the dotted line in FIG. Further, the eject plate 5 is urged toward the discharge position by an eject spring 6 having one end locked to the eject plate 5 and the other end locked to the mechanical chassis 2.
[0008]
According to the cartridge ejecting apparatus 1 of the magneto-optical disk apparatus thus configured, when the cartridge 4 is loaded, the cartridge 4 is first moved in the state where the cartridge holder 3 is in the open position in FIGS. As shown by an arrow A at 13, the cartridge holder 3 is inserted from the open end. When the cartridge 4 is inserted, the eject plate 5 rotates around the rotation shaft 5a by the tip of the cartridge 4 against the tension of the eject spring 6, and the retreat position shown by a solid line in FIG. Go to Here, the eject plate 5 is locked by, for example, engaging an engaging claw (not shown) with an engaging portion (not shown) provided on the mechanical chassis 2.
[0009]
Subsequently, when an outer lid (not shown) is closed, the cartridge holder 3 is rotated around the shaft portion 3a as shown by an arrow P in FIG. 13 and moves to a closed position shown by a solid line in FIG. . In this case, the cartridge holder 3 is accurately positioned on the mechanical chassis 2 by engaging the engagement hole 3b with the reference shaft 2b provided on the mechanical chassis 2. Thus, the loading of the cartridge 4 is completed.
[0010]
When the cartridge 4 is ejected, for example, by operating an eject button provided on a case (not shown), the cartridge holder 3 and the outer lid are firstly moved together with the outer lid as shown by an arrow Q in FIG. It is rotated around the shaft 3a and moves to the open position indicated by the dotted line in FIG.
When the lock of the eject plate 5 is released by opening the cartridge holder 3, the eject plate 5 is moved to a discharge position indicated by a dotted line in FIG. Thereby, the tip of the cartridge 4 is pushed downward by the eject plate 5 in FIGS. 12 and 13. Thus, the cartridge 4 is discharged from the open end of the cartridge holder 3 to the outside as shown by the arrow B in FIGS.
[0011]
In this case, the locking and unlocking of the cartridge holder 3 is performed by an outer lid and a plate cam that operates in accordance with opening and closing of the cartridge holder 3. This plate cam is also formed of an elastic member, and thus also serves as a plate spring. Accordingly, when the outer cover is closed, the plate cam performs a cam operation in accordance with the closing of the outer cover, and when the outer cover is opened, the plate cam deforms based on the opening operation to escape from the opening / closing track of the outer cover. I am getting it.
[0012]
[Problems to be solved by the invention]
However, in the cartridge ejection device 1 configured as described above, the above-described plate cam needs to have rigidity for operation as an original plate cam and elasticity for operation as a plate spring. There is a problem that the operation is unstable due to the conflicting functions.
[0013]
Further, in order to hold the opening of the outer lid and the cartridge holder lightly, another mechanism such as a link mechanism that operates simultaneously with the opening of the outer lid and the cartridge holder is required, which complicates the structure and reduces the number of parts. In many cases, there has been a problem that component costs and assembly costs are increased.
[0014]
The present invention has been made in view of the above points,When the cartridge holder is moved to the open position, the recording medium can be ejected without fail.With a simple configuration, CheapCartridge ejection device to ensure constant operationAnd records and / Or playback deviceIt is intended to provide.
[0015]
[Means for Solving the Problems]
The above object is achieved by the present invention.Claim 1According to the present invention, a mechanical chassis which is a chassis of a mechanical unit, and one side is formed so as to be opened so that a cartridge of a disc is inserted, and the other side is the mechanical chassis.RockingA cartridge holder movably supported, and an eject plate pivotally supported inside the other side of the cartridge holder in a direction along the plane of the disc and urged in a cartridge discharging direction,Supported by a shaft provided on the mechanical chassis to be swingable with respect to the mechanical chassis,Whether the eject plate is in the cartridge holderRetireEvadedpositionso,One end locks the eject plateAn eject release lever,A rotating plate cam that is swingably supported on a side surface of the cartridge holder and has a first protrusion protruding inside the cartridge holder at an end portion, and a second protrusion protruding outside the cartridge holder; Has,This is achieved by a cartridge ejection device.
[0016]
Further, according to claim 2 of the present invention, the first convex portion is bent inside the cartridge holder, and the second convex portion is bent outside the cartridge holder. When the cartridge holder moves from the closed position to the open position, the first convex portion contacts the eject release lever by the rotation of the rotating plate cam, and the other end of the eject release lever. Is guided inward to release the lock of the one end of the eject release lever with the eject plate.
[0017]
According to a third aspect of the present invention, the first and second projections are projections.
[0018]
According to a fourth aspect of the present invention, the eject release lever is biased by a lock spring toward a locking position.
[0019]
According to a fifth aspect of the present invention, the rotary plate cam is biased by a spring and is suppressed by a stopper at a position where the eject release lever can swing when the cartridge holder is closed. I do.
[0020]
According to a sixth aspect of the present invention, there is provided a mechanical chassis, which is a chassis of a mechanical portion, wherein one side is formed to be open so that a disc cartridge is inserted and the other side is supported by the mechanical chassis. A cartridge holder that can swing between an open position and a closed position in conjunction with the opening and closing of the cartridge holder, and information recording and recording on a recording medium provided in the mechanical chassis and housed in the cartridge holder. / Or a record to be played back and / A reproducing unit, an eject plate which is pivotally supported inside the other side of the cartridge holder in a direction along a plane of the disc, and is urged in a cartridge discharging direction; and An eject release lever that is swingably supported by the mechanical chassis with respect to the mechanical chassis, and has an end portion that locks the eject plate at a position where the eject plate is retracted from the inside of the cartridge holder;
A rotating plate cam that is swingably supported on a side surface of the cartridge holder and has a first protrusion protruding inside the cartridge holder at an end portion, and a second protrusion protruding outside the cartridge holder; Records, and / Alternatively, this is achieved by a playback device.
[0021]
[Action]
According to the above configuration, when the cartridge is ejected, when the cartridge holder moves to the open position, the rotating plate cam swings the eject release lever from the locked position to the released position. As a result, the eject plate is released from the retracted position, and swings to the discharge position based on the tension. Therefore, the cartridge inserted in the cartridge holder is discharged outside.
[0022]
When a cartridge is loaded, the eject plate moves to the retracted position when the cartridge is inserted into the cartridge holder, and the eject release lever moves to the locking position, so that the eject plate is locked at the retracted position. Is done. Further, when the cartridge holder moves to the closed position, the rotary plate cam comes into contact with the eject release lever and swings so as to escape from the eject release lever. Thus, the cartridge holder is smoothly closed.
[0023]
the aboveAccording to the second aspect, when the cartridge holder moves from the closed position to the open position, the rotating plate cam rotates, so that the first convex portion comes into contact with the eject release lever, and the other eject release lever is moved. Since the end is guided inward, the engagement of the one end of the eject release lever with the eject plate can be released.
[0024]
According to the third aspect, the first and second projections can form projections by bending the end of the rotary plate cam.
[0025]
According to the fourth aspect, when the eject plate is moved to the retracted position by the tip of the cartridge by inserting the cartridge into the cartridge holder, the eject release lever is moved to the locked position by the tension of the lock spring, and the eject plate is moved. Is locked in the retracted position.
[0026]
According to the fifth aspect, when the cartridge holder is closed, the rotary cam plate is pivoted by the eject release lever against the tension of the spring, and escapes from the eject release lever to close the cartridge holder smoothly. Is done.
[0027]
According to the sixth aspect, when the cartridge holder is located at the closed position, the second convex portion comes into contact with the other end of the eject release lever, and the eject release lever holds the eject plate at a position for locking the eject plate. When the cartridge holder moves from the closed position to the open position, the first convex portion comes into contact with the eject release lever by rotating the rotary plate cam, and the other end of the eject release lever is guided inward. Thereby, the engagement of the one end of the eject release lever with the eject plate can be released.
[0028]
【Example】
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS.
In addition, since the Examples described below are preferred specific examples of the present invention, various technically preferable limitations are added, but the scope of the present invention particularly limits the present invention in the following description. The embodiments are not limited to these embodiments unless otherwise described.
[0029]
1 and 2 show a main part of an embodiment of the cartridge discharge device of the present invention.
In FIG. 1, a cartridge ejection device 10 includes a mechanical chassis 11 fixedly arranged and a swingablesupportThe cartridge holder 12 includes an eject plate 14 for ejecting the cartridge 13 contained in the cartridge holder 12 when the cartridge holder 12 is in the open position.
[0030]
The mechanical chassis 11 is fixedly arranged in a case of a magneto-optical disk device (not shown). A drive device for rotating and driving the magneto-optical disk and an optical pickup for recording and / or reproducing on the magneto-optical disk are provided directly or indirectly on the mechanical chassis 11. I have.
[0031]
The cartridge holder 12 shown in FIGS. 1 and 2 is formed in a flat box shape whose one end, the lower end in the drawing, is open, and a cartridge 13 containing a magneto-optical disk therein is inserted from this open end. It is supposed to be.
Further, the cartridge holder 12 includes a shaft portion 12a as shown in FIG. As a result, the shaft portion 12a is fitted into the shaft holes 11a provided on both sides near the upper end of the mechanical chassis 11, so that the cartridge holder 12 moves from the closed position to the open position with respect to the mechanical chassis 11. Until (see FIGS. 8 and 9), it is swingably supported around the shaft portion 12a. The cartridge holder 12 is connected to an outer lid (not shown), and swings between an open position and a closed position in conjunction with opening and closing of the outer lid.
[0032]
The eject plate 14 is formed of a material having high rigidity and, as shown in FIG. 1, can swing around a rotation axis 14 a perpendicular to the mechanical chassis 11 near the upper right side of the mechanical chassis 11. While supported, a free end 14b extends into the cartridge holder 12 near the upper end.
As a result, the eject plate 14 swings from the retracted position shown in the drawing to the discharge position (see FIGS. 8 and 9) in the cartridge holder 12. Further, the eject plate 14 is urged toward the discharge position by an eject spring 15 having one end locked to the eject plate 14 and the other end locked to the mechanical chassis 11.
[0033]
The above configuration is the same as that of the conventional cartridge discharge device 1 shown in FIGS. 12 and 13, but in the cartridge discharge device 10 according to the present embodiment, the eject plate 14 is opposite to the free end 14b. On the side, a bent piece 14c vertically cut upward is provided.
[0034]
Further, on the mechanical chassis 11, an eject release lever 16 is disposed adjacent to the eject plate 14 and extends entirely in the front-rear direction (the moving direction of the cartridge). In FIG. 1, on the right side surface of the cartridge holder 12, a rotary plate cam 17 extending in the vertical direction (perpendicular to the plane of FIG. 1) is provided.
[0035]
The eject release lever 16 is pivotally supported at its center by a vertical shaft 16a so as to be swingable with respect to the mechanical chassis 11. The eject release lever 16 is biased counterclockwise in FIG. 1 by a lock spring 18 having one end locked to the eject release lever 16 and the other end locked to the mechanical chassis 11. The eject release lever 16 has a front end 16b engaged with a bent piece 14c of the eject plate 14, and has a pin 16d protruding laterally at a rear end 16c.
[0036]
As shown in FIG. 2, the rotary plate cam 17 is pivotally supported by a rotary shaft 17a with respect to the cartridge holder 12, and has one end locked to the rotary plate cam 17 and the other end. Are urged clockwise in FIG. 2 by a spring 19 locked to the mechanical chassis 11. Further, the rotating plate cam 17 abuts against a stopper 20 provided on the cartridge holder 12, thereby suppressing the clockwise rotation in FIG.
[0037]
The rotary plate cam 17 has, at its upper end 17b, two bent portions 17c and 17d bent in the thickness direction as shown in FIGS. That is, the bent portion 17c is bent inward at an upper portion (in FIG. 3) of the rotating plate cam 17 in the vicinity of the tip of the upper end 17b, obliquely rearward and upward. The bent portion 17d is bent outward (downward, rightward) near the upper end (left end in FIG. 3) 17b of the rotary plate cam 17.
[0038]
The cartridge ejection device 10 according to the embodiment of the present invention is configured as described above. When ejecting the cartridge 13, for example, by operating an eject button provided on a case (not shown) or the like, a cartridge holder is firstly operated. 7, together with an outer lid (not shown), is rotated around the shaft portion 12a as shown by the arrow Q direction in FIG. 7, and moves to the open position shown in FIG.
Simultaneously with the opening of the cartridge holder 12, the rotating plate cam 17 first guides the tip of the shaft portion 16d of the eject release lever 16 so that the tip of the shaft portion 16d Then, the bent portion 17 c receives a force indicated by an arrow F from the shaft portion 16 d of the eject release lever 16. As a result, the rotary plate cam 17 receives the torque in the clockwise direction, and moves in the arrow Q direction together with the cartridge holder 12. At this time, the rotating plate cam 17 receives the clockwise torque, but the stopper 20 restricts the clockwise rotation.
[0039]
On the other hand, the eject release lever 16 receives the force indicated by the arrow G in FIG. 6 by the bent portion 17c of the rotary plate cam 17 at the shaft portion 16d. As a result, the eject release lever 16 has its front end 16c pushed in the direction of arrow G against the tension of the lock spring 18.
Accordingly, the eject release lever 16 swings clockwise around the rotation shaft 16a and moves to the release position shown in FIG. Thus, the front end 16b of the eject release lever 16 is disengaged from the bent piece 14c of the eject plate 14.
[0040]
As a result, the eject plate 14 moves to the discharge position shown in FIG. 6 by the tension of the eject spring 15. Thus, the leading end of the cartridge 13 is pushed rearward by the free end 14b of the eject plate 14, that is, downward in FIGS. 6 and 7. Thus, the cartridge 13 is discharged from the open end of the cartridge holder 12 to the outside as shown by the arrow B in FIG.
When the cartridge holder 12 is in the open position, the bent portion 17c of the upper end 17b of the rotary plate cam 17 contacts the shaft portion 16d of the eject release lever 16, and the rotary plate cam 17 is Due to the contact, the cartridge holder 12 is lightly held at the open position.
[0041]
When the cartridge 13 is loaded, as shown in FIG. 9, with the cartridge holder 12 in the open position, as shown in FIG. 8 and FIG. 12 is inserted from the open end.
When the cartridge 13 is inserted, the eject plate 14 (see FIG. 2) rotates around the rotation shaft 14a against the tension of the eject spring 15 (see FIG. 1) by the tip of the cartridge. Move to the retracted position shown by the dotted line in FIG. Here, the bent piece 14 c of the eject plate 14 enters behind the front end 16 b of the eject release lever 16, so that the eject release lever 16 rotates around the rotation shaft 16 a based on the tension of the lock spring 18. Rotate counterclockwise to its front end16bEngages with the bent portion 14c of the eject plate 14. As a result, the eject plate 14 is locked in the retracted position by the eject release lever 16, so that the swing in the counterclockwise direction is prevented.
[0042]
Subsequently, when the outer lid (not shown) is closed, the cartridge holder 12 is rotated around the shaft portion 12a as shown by an arrow P in FIG. 9 and moves to the closed position shown in FIG.
In this case, the cartridge holder 12 is accurately positioned on the mechanical chassis 11 by fitting to a reference shaft (not shown) provided on the mechanical chassis 11. Further, when the cartridge holder 12 moves to the closed position, the side edge of the bent portion 17c of the upper end 17b of the rotary plate cam 17 comes into contact with the shaft portion 16d of the eject release lever 16. Therefore, since the rotating plate cam 17 receives the force indicated by the arrow H from the shaft portion 16d, it swings counterclockwise around the rotating shaft 17a against the tension of the spring 19.
At this time, the eject release lever 16 receives a reaction force from the rotary plate cam 17, and this reaction force acts on the eject release lever 16 counterclockwise in FIG. Therefore, the eject release lever 16 acts not in the eject release direction but in the lock direction, so that the eject release lever 16 is maintained in a stable state. Thus, the loading of the cartridge 13 is completed.
[0043]
When the cartridge holder 12 is moved to the closed position in a state where the cartridge 13 is not inserted into the cartridge holder 12, the shaft 16 d of the eject release lever 16 is similarly bent at the upper end of the rotary cam 17. By sliding along the side edge of the portion 17c, the rotating plate cam 17 is swung counterclockwise in FIG.
[0044]
As described above, in the above-described embodiment, when the cartridge is ejected, the rotating plate cam does not swing, but operates as a cam to swing the eject release lever. By oscillating, escape from the eject release lever. Thus, a stable operation can be obtained when loading and discharging the cartridge.
[0045]
When the rotating plate cam has a convex portion for swinging the eject release lever from the locking position to the release position when the cartridge holder is closed, the eject portion is brought into contact with the eject release lever so that the eject release lever comes into contact with the eject release lever. The release lever can be reliably swung to the release position.
[0046]
If the projection is formed by bending the end of the rotary cam, the projection can be easily formed.
[0047]
When this projection is a projection provided at the end of the rotary plate cam, the projection is similarly easily formed.
[0048]
When the eject release lever is urged by the lock spring toward the locking position, the eject plate is ejected by the eject release lever in conjunction with the swing of the eject plate to the retracted position due to the insertion of the cartridge when the cartridge is loaded. The operation is simplified because the locking of the plate can be performed.
[0049]
When the rotary plate cam is biased by a spring and is restrained by a stopper at a position where the eject release lever can swing when the cartridge holder is opened, the cartridge holder is closed smoothly and the cartridge holder is closed. Is lightly held in the open position. Therefore, a mechanism for holding the cartridge holder lightly is unnecessary, and the configuration is simplified. Thus, costs will be reduced.
[0050]
In the above-described embodiment, the rotating plate cam 17 is provided with the bent portion 17c at the upper end 17b, but is not limited thereto. For example, as shown in FIGS. Instead, a projection 17e protruding inside the upper end 17b of the rotating plate cam 17 may be formed so as to push the shaft portion 16d of the eject release lever 16.
[0051]
Furthermore, although the above-described embodiment describes a cartridge ejection device of a magneto-optical disk device, the present invention is not limited to this, and can be applied to an ejection device of any type of cartridge containing an information recording medium. it can.
[0052]
Further, the cartridge ejection device 10 is configured such that the cartridge 13 containing the magneto-optical disk is loaded substantially horizontally in the mechanical chassis 11, but is not limited to this. It is clear that the cartridge discharge device according to the present invention can be applied to such a structure.
[0053]
【The invention's effect】
As described above, according to the present invention,When the cartridge holder is moved to the open position, the recording medium can be ejected without fail. Also,An information recording medium cartridge ejecting device that has a simple configuration, and can reduce costs and achieve stable operation.And records and / Alternatively, a playback device is provided.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a main part of an embodiment of a cartridge discharge device according to the present invention.
FIG. 2 is a schematic sectional view showing a main part of the cartridge ejection device of FIG.
FIG. 3 is a side view showing the vicinity of the tip of a rotary plate cam of the cartridge ejection device of FIG. 1;
FIG. 4 is a front view showing the vicinity of the tip of the rotary plate cam of FIG. 3;
FIG. 5 is a plan view showing the vicinity of the tip of the rotary plate cam of FIG. 3;
FIG. 6 is a schematic plan view at the time of a discharging operation of the cartridge discharging device of FIG. 1;
FIG. 7 is a schematic sectional view of the cartridge ejection device of FIG. 1 during an ejection operation.
FIG. 8 is a schematic plan view when the cartridge discharge device of FIG. 1 is loaded.
FIG. 9 is a schematic cross-sectional view when the cartridge discharge device of FIG. 1 is loaded.
FIG. 10 is a side view showing a modification of the rotary plate cam of FIG. 3;
FIG. 11 is a plan view of the rotary plate cam of FIG. 10;
FIG. 12 is a schematic plan view showing an example of a conventional cartridge ejection device.
FIG. 13 is a schematic sectional view of the cartridge ejection device of FIG.
[Explanation of symbols]
10 Cartridge ejection device
11 Mechanical chassis
12 Cartridge holder
13 cartridge
14 Eject board
15 Eject spring
16 Eject release lever
17 Rotating plate cam
18 Lock spring
19 Spring
20 Stopper

Claims (6)

A mechanical chassis, which is a chassis of the mechanism,
A cartridge holder having one side formed to be open so that a disc cartridge is inserted and the other side supported by the mechanical chassis, and capable of swinging between an open position and a closed position in conjunction with opening and closing of the outer lid ; ,
An eject plate which is pivotally supported in a direction along a plane of the disk and is urged in a cartridge discharging direction inside the other side of the cartridge holder;
Wherein the shaft provided in the mechanical chassis is swingably supported with respect to the mechanical chassis at a position where said eject plate is removing all we do in the cartridge holder, the eject release lever having one end for locking the eject plate When,
A rotating plate cam that is swingably supported on a side surface of the cartridge holder and has a first protrusion protruding inside the cartridge holder at an end portion, and a second protrusion protruding outside the cartridge holder; With
When the cartridge holder is located at the closed position, the second convex portion comes into contact with the other end of the eject release lever, and the eject release lever holds the eject plate at a position for locking the eject plate,
When the cartridge holder moves from the closed position to the open position, the first convex portion comes into contact with the eject release lever by rotating the rotary plate cam, and the other end of the eject release lever moves inward. The cartridge ejection device wherein the engagement with the eject plate at one end of the eject release lever is released by being guided . The first convex portion is bent inside the cartridge holder,
The second convex portion is configured to be bent outside the cartridge holder,
When the cartridge holder moves from the closed position to the open position, the first convex portion comes into contact with the eject release lever by rotating the rotary plate cam, and the other end of the eject release lever moves inward. 2. The cartridge ejection device according to claim 1 , wherein the guide releases the lock of the one end of the eject release lever with the eject plate . The cartridge ejection device according to claim 1 , wherein the first and second protrusions are protrusions . The cartridge ejection device according to claim 1 , wherein the eject release lever is biased by a lock spring toward a locking position. 2. The cartridge ejection device according to claim 1 , wherein the rotary plate cam is biased by a spring and is restrained by a stopper at a position where the eject release lever can swing when the cartridge holder is closed. A mechanical chassis, which is a chassis of the mechanism,
A cartridge holder, one side of which is formed open so that a disc cartridge is inserted and the other side of which is supported by the mechanical chassis, and which can swing between an open position and a closed position in conjunction with opening and closing of the outer cover; ,
Recording of information on a recording medium provided in the mechanical chassis and stored in the cartridge holder, / Or a record to be played back and / Or a playback unit,
An eject plate slidably pivoted in a direction along a plane of the disk inside the other side of the cartridge holder and urged in a cartridge discharging direction;
An eject release lever that is swingably supported with respect to the mechanical chassis by a shaft provided on the mechanical chassis, and at which the eject plate is retracted from the cartridge holder, one end of which locks the eject plate;
A rotating plate cam that is swingably supported on a side surface of the cartridge holder and has a first protrusion protruding inside the cartridge holder at an end, and a second protrusion protruding outside the cartridge holder; With
When the cartridge holder is located at the closed position, the second protrusion is Contacting the other end of the release lever, the eject release lever is held at a position for locking the eject plate,
When the cartridge holder moves from the closed position to the open position, the first convex portion comes into contact with the eject release lever by rotating the rotary plate cam, and the other end of the eject release lever moves inward. By being guided, the locking of the one end of the eject release lever with the eject plate is released. / Or a playback device.

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