JP3525459B2 - Eject mechanism for disk cartridge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eject mechanism for smoothly taking out a disc cartridge in a disc player which mounts a disc cartridge containing a disc as a recording medium and reproduces (records) the disc. .

[0002]

2. Description of the Related Art In a disc player that mounts a disc cartridge in which a disc as a recording medium is rotatably accommodated to reproduce (or record) a disc, an eject mechanism for smoothly taking out the disc cartridge is provided. To be

To briefly explain an example of the eject mechanism of the disc cartridge, the eject mechanism is as follows.
An eject lever is attached to the side of the cartridge holder where the disc cartridge is inserted and held so as to be movable in the same direction as the disc cartridge insertion and removal directions. This eject lever is always ejected by the spring member. Biased in the direction.

An engaging claw is provided at the tip of the eject lever at a right angle so as to be engaged with the disk cartridge. That is, the disc cartridge is formed with a concave portion on its side, and when the disc cartridge is inserted into the cartridge holder, the engaging claw of the eject lever is engaged with the concave portion.

Therefore, the eject lever is moved integrally with the insertion operation of the disc cartridge, that is, the disc cartridge is in a state of pulling the eject lever against the force of the spring member, and the disc cartridge is completely inserted. In the locked state, the lock mechanism locks the eject lever at that position.

When the disc cartridge is taken out, the eject lever is returned by the force of the spring member due to the release of the lock, so that the disc lever is pulled by the eject lever. Ejected as if jumping out of the holder.

[0007]

In such an ejecting mechanism of the disc cartridge, the engaging claw of the eject lever may fall out of the concave portion of the disc cartridge when the disc cartridge is inserted into the cartridge holder.

That is, since the disk cartridge has some play (play) in the cartridge holder, it may be inserted in a slightly tilted state. In this case, the engaging claws force in a direction to escape from the recess. Acts, and as a result, the engaging claws fall off from the recesses.

When the engaging claws of the eject lever fall off from the concave portion of the disc cartridge in this way, the eject mechanism does not function at all and the disc cartridge cannot be taken out smoothly. The present invention has been made for the purpose of solving such a problem.

[0010]

In order to achieve the above object, the present invention provides a cartridge holder into which a disc cartridge is inserted and held, and a cartridge holder which is attached to the cartridge holder so as to be movable in the inserting and removing direction of the disc cartridge. , An engaging lever projectingly provided on a part of the eject lever engages with the recess of the disc cartridge, and the engaging claw of the eject lever has a surface facing the recess of the disc cartridge in the disc cartridge releasing direction. It is configured such that an undercut portion that is cut out in a concave shape is formed in the root portion on the side.

In this eject mechanism, a guide wall is provided to guide the eject lever when the disc cartridge is inserted and to prevent the engaging claw from falling out of the recess of the disc cartridge.

[0012]

By forming the undercut portion in the eject lever as described above, the engaging claw of the eject lever does not escape from the concave portion of the disc cartridge even when the disc cartridge is inserted in a slightly inclined state. Engagement will be maintained, and thus the eject mechanism will function reliably.

Further, by providing the guide wall for guiding the eject lever to be called in when the disc cartridge is inserted, the engaging claw is prevented from coming off from the concave portion of the disc cartridge, and the operation of the eject mechanism is surely performed. Sex is more enhanced.

[0014]

Embodiments of the present invention will be described in detail below with reference to the drawings.

In this example, a portable disc player for reproducing a small-sized magneto-optical disc having a diameter of 64 mm called a mini disc (MD) will be described.

FIG. 1 shows the appearance of this disc player. A magneto-optical disc (hereinafter simply referred to as a disc) 100 mounted on the disc player 1 is made of a plastic cartridge 101 as shown in FIG.
It is rotatably housed therein and has already recorded signals, that is, music and the like. Then, a cartridge (hereinafter referred to as a disc cartridge) 101 accommodating the disc 100 is inserted and mounted in the disc player 1 to reproduce the disc 100.

This disc player 1 is formed to be smaller and thinner than the conventional disc player of the same kind with an emphasis on portability.
It is formed to an ultra-thin thickness of 5 mm.

FIG. 2 shows a structure that enables the reduction in size and thickness.
~ Shown in FIG. In the figure, reference numeral 2 denotes a main chassis (hereinafter simply referred to as a chassis) which is a basic framework of the disc player 1. As shown in FIGS. 3 and 4, the chassis 2 has four side surfaces (left side surface 2a) formed by thin sheet metal. , Rear side surface 2b, right side surface 2c, front side surface 2d)
Is formed in a frame shape having.

That is, the left side surface portion 2a, the rear side surface portion 2b, and the right side surface portion 2c of the chassis 2 are formed by bending a sheet metal into a U-shape, and by fixing the sheet metal constituting the front side surface portion 2d to this, a total of 4 A frame-shaped chassis 2 having a surface is formed.

A mechanical deck 40, which is a disk drive mechanism section on which the disk cartridge 101 is mounted, is supported so as to be housed in the chassis 2.
The mechanical deck 40 will be described later in detail.

On the lower surface side of the chassis 2, a circuit board 3 including a disk drive circuit and a signal reproducing circuit is fixed by screws 4.

Reference numeral 5 is a battery case for accommodating a battery 6 as an operating power source of the disc player 1. The battery case 5 is a rigid body formed by, for example, zinc die casting, and the battery case 5 is the right side surface portion 2c of the chassis 2.
Is stuck to.

The structure of the fixed portion between the battery case 5 and the chassis 2 will be described in more detail with reference to FIG.
On the upper edge of the right side surface portion 2c of the two convex portions 2c ₁ , 2
c ₂ is formed so as to project, and correspondingly, the side surface of the battery case 5 is formed with engaging holes 7a and 7b which communicate with each other in the vertical direction. The engaging holes 7a and 7b are fitted to the chassis 2 from below. 2c ₁ and 2c ₂ of the chassis ₂ are inserted into and engaged with each other, and then the right side surface 2c of the chassis 2 and the battery case 5 are screwed onto the above-mentioned projections 2c ₁ and 2c ₂ and the engaging holes 7a and 7c.
It is fastened and fixed in a direction orthogonal to the insertion engagement direction of b.

By fixing the battery case 5 made of a rigid body to one side surface portion (right side surface portion 2c) of the chassis 2 formed by bending the thin sheet metal as described above, the strength of the chassis 2 is higher than that of the chassis alone. Will be greatly improved.

The battery 6 as an operating power source housed in the battery case 5 is a rechargeable dedicated battery, and the electrodes 6a and 6b formed on the end faces thereof are arranged inside the battery case 5. By contacting the terminals 9a and 9b of the input board 9, electric power is supplied to the disk drive mechanism section of the mechanical deck and the electronic circuit on the circuit board.

The opening of the battery case 5 for inserting and removing the battery 6 is designed to be opened and closed by a battery lid 10 which is rotatably supported on the chassis 2 in a horizontal direction. The structure of the battery lid 10 will be described later.

As described above, the circumference of the chassis 2 whose strength is improved by fixing the battery case 5 made of a rigid body is
It is covered with a lower lid 11, an upper lid 12 and a decorative frame 13 which form an outer casing of the disc player 1.

The lower lid 11 is formed of an aluminum plate in such a size as to cover the lower surface side of the chassis 2 to the lower surface side of the battery case 5, and the lower lid 11 is fixed to the chassis 2 and the battery case 5 by the screw 14. .

A left side surface portion 2a is provided on the rear portion of the chassis 2.
And a pair of arms 15a and 15b made of sheet metal are rotatably supported in the vertical direction (vertical direction) along the inner surface of the right side surface portion 2c, and the aluminum plate is mounted on the arms 15a and 15b of the chassis 2. An upper lid 12 having a size covering the upper surface side is fixed by a screw 16. That is, the upper lid 12 is vertically rotatable with respect to the chassis 2 and is configured as an opening / closing lid that opens and closes the disk cartridge mounting portion of the mechanical deck.

The decorative frame 13 arranged between the lower lid 11 and the upper lid 12 is made of hard plastic in a U shape along the left side surface 2a, the rear side surface 2b and the front side surface 2d of the chassis 2. This is fixed to the outer peripheral surface of the chassis 2 by screws 17.

Various operation buttons (in this example, six kinds of operations for reproducing, fast-forwarding, reverse-feeding, temporarily stopping, stopping, and adjusting the volume of the disk are provided on the center surface of the decorative frame 13 corresponding to the left side surface 2a of the chassis 2. Button) 18 is provided,
As will be described later, by pressing the surface switches 19a of the switch board 19 fixed to the left side surface 2a of the chassis 2 with the respective operation buttons 18, various operations of the disk and volume adjustment are performed.

As described above, in the disc player 1 of this example, the frame-shaped chassis 2 made of thin metal plate is used.
The battery case 5 made of a rigid body is fixed to the chassis 2
The lower lid 11 made of aluminum is straddled between the chassis 2 and the battery case 5, and the upper lid 1 made of aluminum is attached to the upper surface of the chassis 2.
By attaching 2 and fixing the decorative frame 13 made of hard plastic to the outer peripheral surface of the chassis 2, it is possible to construct an overall structure that is small, thin, lightweight and has sufficient strength for practical use.

Further, in the structure of this embodiment, a special structure is adopted for the shaft supporting portion of the battery lid 10 for opening and closing the battery case 5 and the shaft supporting portion of the upper lid 12 for opening and closing the disk mounting portion in order to enable downsizing. ing.

This structural portion is shown in FIG. Battery lid 10
Chassis 2 so that the opening of the battery case can be opened and closed.
The rotary plate 10a is pivotally supported on the rotary plate 10a, and the lid main body 10b is slidably attached to the rotary plate 10a along its surface in a predetermined range.

An engaging projection 21 is provided on the tip of the lid body 10b, and an engaging hole 22 is formed correspondingly to the opening edge of the battery case 5 as shown in FIG. The opening of the battery case 5 is closed by the battery lid 10 with the lid body 10b moved to the free end side of the rotating plate 10a, and the lid body 10b is moved from this state to the base end side of the rotating plate 10a. The battery cover 10 is locked by engaging the engaging projection 21 with the engaging hole 22.

The axially supporting portion of the battery lid 10 thus constructed with respect to the chassis 2 is set to be substantially the same as the axially supporting portion on one side of the upper lid 12.

That is, as is apparent from FIG. 5, in the vicinity of the bent portion between the rear side surface portion 2b and the right side surface portion 2c of the chassis 2, the first and second upper and lower edges of the right side surface portion 2c are provided for pivotally supporting the battery lid 10. The first bearing portion 23a, 23b is symmetrically formed, and is located between the upper and lower first bearing portions 23a and 23b, and the upper lid 12 is attached to the right arm 15
The 2nd bearing part 25 for supporting b is formed.

The first bearing portion 23 that axially supports the battery lid 10.
Each of a and 23b is formed in a U-shape in which a root portion thereof rises vertically and a tip portion thereof is bent horizontally inward. Correspondingly, a and 23b are formed on a base end portion side of the rotating plate 10a of the battery lid 10. Upper and lower protruding piece portions 10a ₁ and 10a _{2 that} are provided in a protruding manner.
Support shafts 24a and 24b are provided so as to face each other. The upper and lower support shafts 24a and 24b can be easily inserted by laterally inserting and engaging the first bearing portions 23a and 23b, respectively. It can be assembled.

In this structure, flanges 24a ₁ and 24b ₁ are formed at the roots of the support shafts 24a and 24b, respectively, and the support shafts 24a and 24b are connected to the first bearings 23a and 2b, respectively.
When the battery case 5 is fixed to the right side surface portion 2c of the chassis 2 after being engaged with 3b, the flange portions 24a ₁ and 24
b ₁ is brought into contact with a part of the battery case 5, whereby the battery lid 10 is assembled without rattling with the support shafts 24a, 24b prevented from coming off from the first bearing portions 23a, 23b. (See FIG. 7).

On the other hand, the arm 1 to which the upper lid 12 is attached
The second bearing portion 25 that pivotally supports 5b is the first bearing portion 23.
between the first and second bearings 23a, 23b
A protrusion 15 is formed in a cut-and-raised shape in a direction orthogonal to b, and an arm 15b is pivotally supported by a caulking pin 26 on the second bearing portion 25 so as to be vertically rotatable.

As described above, according to the present structure, the shaft supporting portions of the battery lid 10 and the upper lid 11 which are different from each other in the rotating direction are efficiently arranged on the chassis 2 and the space is effectively used, which is advantageous for downsizing the disc player. It has a simple structure.

Further, in the disc player 1 of this example,
A structure for ensuring sufficient strength in the arrangement portion of the operation button 18 of the decorative frame 13 is considered.

The structure of the decorative frame 13 is shown in FIGS. 8 and 9. The decorative frame 13 is provided with a concave portion 27 corresponding to the operation button 18, and the operation button 18 is arranged so as to fit in the concave portion 27.

Two types of pins 28 and 29 are provided on the back side of each operation button 18, and these pins 28 and 29 penetrate through the through holes 30 and 31 formed in the bottom portion of the recess 27, respectively. The switch board 19 that faces the inner surface of the frame 13 and has one pin 28 fixed to the left side surface 2 a of the chassis 2
Of the surface switch 19a, and the other pin 29 is connected to a leaf spring 32 fixed to the inner surface of the decorative frame 13.

A flexible portion 32a is formed in the leaf spring 32 by making a predetermined cut corresponding to each operation button 18, and the pin 29 of each operation button 18 is connected and fixed to the flexible portion 32a by melting caulking. The elastic force of the flexible portion 32a of the leaf spring 32 applies a force in the return direction to each operation button 18. The pin 28 penetrates a through hole 32b formed in the leaf spring 32 and is in contact with the surface switch 19a of the switch substrate 19.

By pressing the operation button 18 against the force of the leaf spring 32, the surface switch 19a corresponding to the operation button 18 is operated, and in response to this, various disk operations (playback, fast forward, reverse feed) are performed. , Pause, stop) and volume adjustment.

With such a structure, the decorative frame 13 of this example has a sufficient strength as compared with the conventional mounting structure of the operation button 18. That is, in the generally adopted structure, the decorative frame 13 is provided with a through hole through which the operation button 18 entirely penetrates. However, with this structure, the strength of the decorative frame 13 is significantly reduced at the lightening portion due to the through hole. Therefore, in this structure, the arrangement portion of the operation button 18 of the decorative frame 13 is the recess 27,
That is, the decorative frame 13 has a structure in which the meat is left to avoid a decrease in the strength of the decorative frame 13. By sufficiently securing the strength of the decorative frame 13 as described above, it is possible to greatly contribute to the improvement of the strength of the disc player 1 as a whole.

Next, the structure of the mechanical deck 40 arranged in the chassis 2 will be described with reference to FIGS. 3 and 11. 41
Is a mechanical chassis that is the substrate of this mechanical deck 40,
The mechanical chassis 41 is supported in a floating state at a plurality of locations by a supporting piece 2e that horizontally projects toward the inner surface of the chassis 2 via cushioning members (a rubber damper 42 and a coil spring 43).

The mechanical chassis 41 has a disk 1
A turntable 44, which is rotationally driven by a motor on which 00 is mounted, an optical pickup (not shown in the figure) for reading a signal of the disc 100, and the like are arranged. Reference numeral 45 is a positioning pin projectingly provided on the mechanical chassis 41.

In the mechanical chassis 41, the shaft support 46 provided at the rear end of the mechanical chassis 41 is attached to the disc cartridge 101.
A cartridge holder 47 for holding the cartridge is rotatably supported in the vertical direction.

The cartridge holder 47 includes an upper surface plate portion 47a, both side plate portions 47b and 47c which are bent downward at right angles from both left and right sides of the upper surface plate portion 47a, and inside lower ends of the both side plate portions 47b and 47c. The lower support plate portions 47d and 47e projecting at right angles are integrally provided, and the cartridge holder 47 is attached to the mechanical holder 41 in a state of being rotated so as to be lifted up to a predetermined angle. Insert the disc cartridge 101, and from this state, the cartridge holder 4
By rotating 7 downwardly so as to overlap with the mechanical chassis 41, the disc cartridge 101 is mounted at a predetermined mounting position on the mechanical chassis 41, that is, the reference hole formed on the lower surface of the disc cartridge 101 engages with the positioning pin 45. At the same time as the positioning of the disc cartridge 101 is performed, the central portion of the disc 100 exposed on the lower surface side of the disc cartridge 101 is placed on the turntable 44.

On the right side plate portion 47c of the cartridge holder 47, a shutter opening piece 80 for opening the shutter 102 of the disc cartridge 101 is formed so as to project inside the cartridge holder 47.
Further, in front of this, the cartridge holder 47
On the outer surface of the right side plate portion 47c of the
8 is attached. This shutter lid member 48
Is formed by processing a metal plate, and a convex portion 48a formed at the tip thereof projects into the cartridge holder 47 through the through hole 49 of the right side plate portion 47c of the cartridge holder 47.

When the disc cartridge 101 is inserted into the cartridge holder 47, the disc cartridge 101 is inserted while the side surface of the shutter 102 slides on the convex portion 48a of the shutter closing member 48, and the convex portion 48a is engaged with the shutter 102. While being engaged with the fitting hole 102a, the shutter opening piece 80 unlocks the shutter by a shutter lock member (not shown) in the disc cartridge 101 and hits the shutter 102. Therefore, when the disc cartridge 101 is inserted. The shutter 102 is opened, and a part of the disc 100 is exposed through the opening on the lower surface of the disc cartridge 101 to face the optical pickup. Further, when the disc cartridge 101 is ejected from the cartridge holder 47, the shutter closing member 48 engaged with the engagement hole 102a of the shutter 102 at the time of insertion causes the shutter to be released along with the ejection of the disc cartridge 101. 102 is designed to be closed.

In the disc player 1 of this example,
Although the rotation fulcrum of the cartridge holder 47 and the rotation fulcrum of the upper lid 12 are set to be slightly deviated from each other, the cartridge holder 47 is rotated in conjunction with the opening / closing operation of the upper lid 12.

That is, the cartridge holder 47 is provided with projecting pieces 47b ₁ and 47c ₁ projecting horizontally from the left and right side plate portions 47b and 47c, respectively, while the left and right arms 15a and 15b to which the upper lid 12 is fixed are provided. Are provided with projecting piece portions 15a ₁ and 15b ₁ which respectively project inward in the horizontal direction, and the projecting piece portion 47 of the cartridge holder 47 is provided.
It is arranged to face the lower side of b ₁ and 47c ₁ ,
When the upper lid 12 is opened, the protruding pieces 15a of the arms 15a and 15b
₁ , 15b ₁ are protrusions 47 of the cartridge holder 47
b ₁ and 47 c ₁ are brought into contact with and lifted up, so that the cartridge holder 47 is moved so as to follow the upper lid 12.
Will be rotated upwards. The maximum opening angle between the upper lid 12 and the cartridge holder 47 is 25 °, respectively.
And is set to 20 °.

Further, as shown in FIG. 10, leaf spring members 50 and 51 are fixed to the left and right on the back surface side of the upper lid 12, and the leaf spring members 50 and 51 are elastically projecting back and forth 50a, respectively. And 50b, 51a and 51b are formed to project. Further, an elastic projection piece 51c is formed so as to project also in the central portion of the right leaf spring member 51.

These elastic protrusions 50a, 50b, 51
Each of a, 51b, 51c is bent in an inclined shape so as to float up from the inner surface side of the upper lid 12, and when the upper lid 12 is closed, the elastic protrusion 51c of the leaf spring member 51 on the right side is above the cartridge holder 47. The cartridge holder 47 is rotated downward so as to come into contact with the face plate portion 47a and press it downwardly, and thus follow the upper lid 12.

When the upper lid 12 is completely closed,
The central elastic protrusion 51c of the right leaf spring member 51 presses the cartridge holder 47 toward the mechanical chassis 41 side, and the elastic protrusions 50a and 50b, 51a and 51b of the leaf spring members 50 and 51 on both sides are respectively discs. The cartridge 101 is pressed against the mechanical chassis 41 side, whereby the disc cartridge 101 is securely mounted in the disc cartridge mounting portion on the mechanical chassis 41 without rattling.

In this construction, the leaf spring members 50, 5
The elastic protrusions 50a and 51a on the front side of the disk cartridge 1 are located in front of the cartridge holder 47, respectively.
01, and the elastic protrusions 50b and 51b on the rear side abut on the disk cartridge 101 through the left and right through holes 52a and 52b formed in the upper plate portion 47a of the cartridge holder 47, respectively. .

The upper lid 12 is structured to be locked by a lock mechanism in a completely closed state, that is, this lock mechanism is a hook-like lock piece 53 provided at the center of the front side surface portion 2d of the chassis 2. , This lock piece 5
3 and a fastening plate 54 fixed to the inner surface side of the front end portion of the upper lid 12, and when the upper lid 12 is completely closed, the fastening recess 54a of the fastening plate 54 is fastened to the lock piece 53. By doing so, the upper lid 12 is locked.

Further, when the lock of the upper lid 12 is released, the lock piece 53 is slid by operating the lock release operation member 55 provided on the decorative frame 13.
The upper lid 12 can be opened by detaching it from No. 4.

When the lock of the upper lid 12 is released and the upper lid 12 is opened, if the disc cartridge 101 is inserted, the disc cartridge 101 is ejected (ejected) so as to jump out from the cartridge holder 47.

The structure of the eject mechanism of the disc cartridge 101 is shown in detail in FIG. The right side plate portion 47c of the cartridge holder 47 is integrally formed with a support plate portion 57 that horizontally projects from the lower end thereof.
An eject lever 58 made of a metal plate is slidably supported on the support plate 57 in the front-rear direction, that is, in the same direction as the insertion / removal direction of the disc cartridge 101.

The eject lever 58 includes a substrate portion 58a along the support plate portion 57 of the cartridge holder 47,
The elastic plate portion 5 which rises vertically from the front end portion of the substrate portion 58a and extends along the right side plate portion 47c of the cartridge holder 47.
8b and extension plate portion 58c are integrally formed, and the substrate portion 5
Guide elongated holes 59a, 59b formed in the longitudinal direction of 8a
Are guided by guide pins 60a and 60b fixed to the support plate portion 57 of the cartridge holder 47 so as to be slidable in the front-back direction within a predetermined range.

The eject lever 58 is provided with a spring hooking projection 58d at the front end of the base plate portion 58a. A tension coil spring 61 is stretched between the spring hooking projection 58d and the front guide pin 60a. Yes, the force of the tension coil spring 61 keeps the eject lever 58 forward,
That is, the disc cartridge 101 is biased in the eject direction.

At the tip of the elastic plate portion 58b of the eject lever 58, there is provided a resin engaging pawl 62 which engages with the recess 103 formed in the side portion of the disc cartridge 101. The engaging claw 62 is integrally formed with the sheet metal eject lever 58 by outsert molding, and the engaging claw 62 is formed in the elongated hole 63 formed in the right side plate portion 47 c of the cartridge holder 47. When the disc cartridge 101 is inserted into the cartridge holder 47, the engaging claws 62 engage with the recesses 103 of the disc cartridge 101 (see FIG. 13), whereby the disc cartridge 101 is inserted. The eject lever 58 is slid integrally with the above.

The engaging claw 62 of the eject lever 58 is provided with an undercut portion 62a, as is apparent from FIG. 13, that is, the disc on the surface of the engaging claw 62 which is in contact with the recess 103 of the disc cartridge 101. The base portion on the cartridge removal direction side is formed in an undercut shape by cutting out in a concave shape.

Since the engaging claw 62 is provided with the undercut portion 62a in this manner, the engaging claw 62 can be surely engaged with the concave portion 103 of the disc cartridge 101 easily.
Even when the disc cartridge 101 is inserted in a state in which the disc cartridge 101 is slanted in the cartridge holder 47 as shown by a phantom line in FIG.
The force does not act in the direction of escaping from the recess 103, so that the engagement state between the engagement claw 62 and the recess 103 is reliably maintained.

Further, the eject lever 58 is provided with a lock pin 64 which is erected on the outer surface side of the distal end portion of the extension plate portion 58c so as to be engaged with a lock member 67 which will be described later. Further, the extension plate portion 58c has an inner surface side. Guide pin 65 is planted in
The guide pin 65 engages with the guide elongated hole 66 formed in the right side plate portion 47c of the cartridge holder 47 and is guided along the guide elongated hole 66, so that the lock pin 64 is accurately engaged with the lock member 67. I am doing it.

The lock member 67 is pivotally attached to the rear end portion of the right side plate portion 47c of the cartridge holder 47 by a shaft pin 68, and its tip portion is engaged with the lock pin 64 of the eject lever 58 described above. Matching claw 67a
have.

A shaft pin 68 for pivotally mounting the lock member 67
A torsion coil spring 69 is mounted on the cartridge holder 47, one end of which is on the cartridge holder 47 side and the other end of which is a lock member 67.
The lock members 67 are attached to the respective sides, and the force of the torsion coil spring 69 always urges the lock member 67 to rotate clockwise in the drawing.

Further, the lock member 67 has a predetermined protruding position 67b abutting against a stopper projecting piece 70 projecting on the cartridge holder 47 side, so that the locking member 67 has a predetermined rotational position, that is, the claw 67a is ejected by the eject lever 58. The lock pin 64 is locked at a position corresponding to the lock pin 64.

Further, this lock member 67 is provided with an operation piece portion 67c used for releasing the engagement of the eject lever 58 with the lock pin 64, and a lock for operating this operation piece portion 67c. The release mechanism is configured on the mechanical chassis 41 side.

The lock release mechanism is a so-called ratchet mechanism, and the rotation of the cartridge holder 47 is used to release the engagement between the lock member 67 and the lock pin 64.

Corresponding to the lock member 67 on the cartridge holder 47 side, a vertical wall 71 is erected upright in the mechanical chassis 41 so as to face the right side plate portion 47c of the cartridge holder 47. 71
A ratchet member 72, which constitutes a ratchet mechanism, is pivotally attached by a shaft pin 73. This ratchet member 72 has an operation piece 6 of the lock member 67 at one end.
7c is formed with an action claw 72a, and a stopper projection 72b is provided at the other end.

A torsion coil spring 74 is attached to the shaft pin 73 pivotally mounting the ratchet member 72, one end of which is on the side of the vertical wall 71 and the other end of which is the ratchet member 72.
The ratchet member 72 is engaged with the lock member 67 in a direction opposite to the lock member 67, that is, counterclockwise in the figure by the force of the torsion coil spring 74. When the protrusion 72b contacts the upper edge of the vertical wall 71, the predetermined pawl 72a is locked at a position corresponding to the operating claw 72a of the lock member 67.

Further, the vertical wall 71 to which the ratchet member 72 is attached is inclined and bent so that the front portion 71a thereof opens outward, whereby the vertical wall 71 is inserted into the disc cartridge 101 as described later. It is constructed so as to function as a guide wall for smoothly attracting the eject lever 58.

Next, the operation of the eject mechanism constructed as described above will be described in detail. First, as shown in FIG. 14, when the disc cartridge 101 is inserted into the cartridge holder 47 with the cartridge holder 47 being lifted (the upper lid 12 is open) with respect to the mechanical chassis 41, the engaging claw 62 of the eject lever 58 causes the disc cartridge 101 to move. The eject lever 58 is engaged with the concave portion 103 on the side of the disk 101, so that the eject lever 58 can be pulled by the disk cartridge 101.
It is moved rearward integrally with the disc cartridge 101 against the force of.

At this time, since the engaging claw 62 of the eject lever 58 has the undercut portion 62a as described above, the engaging claw 62 and the recess 103 are reliably maintained in the engaged state, and the disc Even when the cartridge 101 is inserted in the cartridge holder 47 with some play and tilted, the engagement claw 62 does not fall out from the recess 103.

Even if the engaging claw 62 tries to escape from the concave portion 103, the elastic plate portion 58b of the eject lever 58 is guided by the vertical wall 71 of the unlocking mechanism portion so as to be attracted, so that the engaging portion is engaged. The claw 62 is a recess 103
Therefore, the eject lever 5
8 is surely moved integrally with the disc cartridge 101.

When the disc cartridge 101 is completely inserted into the deepest portion of the cartridge holder 47, the lock pin 64 of the eject lever 58 engages with the claw portion 67a of the lock member 67 as shown in FIG. The lever 58 is locked.

Incidentally, the lock pin 64 and the lock member 67.
More specifically, the engagement operation of the lock lever 64 is brought into contact with the tip inclined edge of the claw portion 67a of the lock member 67 by the rearward movement of the eject lever 58 to press the same, and this pressing force causes the lock member 64 to move. 67 is rotated so as to be pushed down against the force of the torsion coil spring 69, and eventually, when the lock pin 64 crosses the claw portion 67a, the lock member 67 returns to its original position by the force of the torsion coil spring 69, The lock pin 64 is engaged with the portion 67a, and the eject lever 58 is locked.

Then, as described above, the disk cartridge 1
01 is completely inserted in the cartridge holder 47 and the eject lever 58 is locked,
16, the cartridge holder 47 is rotated downward, and when the disc cartridge 101 is mounted in the disc cartridge mounting portion on the mechanical chassis 41, the operation piece portion 67c of the lock member 67 moves the ratchet member 72 as shown in FIG. It is located below the working claw 72a by overcoming the working claw 72a.

The operation piece 67c of the lock member 67 rides over the action claw 72a of the ratchet member 72 in the following manner.

That is, the lock member 67 is the stopper projection piece 7.
Since the clockwise rotation is restricted by 0, the operation piece portion 67c abuts against the operation claw portion 72a of the ratchet member 72 and presses it, and the force causes the ratchet member 7 to move.
2 is rotated in the clockwise direction against the force of the torsion coil spring 74, that is, in the direction in which the action claw portion 72a escapes from the operation piece portion 67c of the lock member 67, and as a result, the operation piece portion 67c of the lock member 67 is moved to the ratchet member 72. Overcoming the claw portion 72a.

Then, from this state, the upper lid 12 is opened and as shown in FIG.
When the cartridge holder 47 is rotated so as to be lifted upward as shown in FIG. 7, the ratchet member 72 is restricted from rotating in the counterclockwise direction by the stopper projecting piece 72b. When the operation piece portion 67c comes into contact with the action claw portion 72a of the ratchet member 72, the lock member 67 is turned counterclockwise relative to the cartridge holder 47 against the force of the torsion coil spring 69. .

That is, the lock member 67 is the operation piece 67c.
Is brought into contact with the operating claw portion 72a of the ratchet member 72, whereby the cartridge holder 47 is placed in a state in which the cartridge holder 47 is rotated upward.
The lock pin 64 is disengaged from the claw portion 67a of 7 and the lock is released, whereby the eject lever 58 is returned and moved forward by the force of the tension coil spring 61, and as a result, the eject lever 58 is pulled. Then, the disc cartridge 101 is ejected so as to jump out from the cartridge holder 47.

When the upper lid 12 is completely opened and the cartridge holder 47 is lifted at the uppermost rotating position, the operation piece 67c of the lock member 67 passes over the operating claw 72a of the ratchet member 72 and is returned to its original position. Is returned to the state of.

As described above, when the upper lid 12 is opened and the disc cartridge 101 is ejected from the cartridge holder 47 at the same time, the user can easily take out the disc cartridge 101.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the configuration of this embodiment.

[0091]

As described in the above embodiments, the present invention is provided with a cartridge holder into which a disc cartridge is inserted and held, and a cartridge holder which is attached to the cartridge holder so as to be movable in the direction of inserting and removing the disc cartridge. An engaging lever that engages with a recess of the disc cartridge, and the engaging claw of the eject lever has a base on the disc cartridge releasing direction side of the surface of the contact surface with the recess of the disc cartridge. Due to the structure in which the undercut part that is cut out in a concave shape is formed in the part, the engaging claw of the eject lever does not escape from the recess of the disc cartridge even if the disc cartridge is inserted in a slightly tilted state. Will remain engaged, which will ensure that the eject mechanism It can be taken out to the disk cartridge smoothly.

Further, by providing the guide wall for guiding the eject lever to be called at the time of inserting the disc cartridge, the engaging claw portion is more reliably prevented from coming off from the concave portion of the disc cartridge, and the operation of the eject mechanism is prevented. Certainty will be higher. As described above, according to the present invention, it is possible to provide a reliable and reliable ejecting mechanism for a disc cartridge.

[Brief description of drawings]

FIG. 1 is a perspective view of a disc player according to an embodiment.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is an exploded perspective view of a chassis and a mechanical deck of the same.

FIG. 4 is an exploded perspective view of a portion of a chassis and a battery case of the same.

FIG. 5 is an exploded perspective view of the shaft supporting portions of the battery lid and the upper lid.

FIG. 6 is a plan view of the battery lid with a part thereof cut away.

FIG. 7 is a plan view of the shaft supporting portion of the battery lid.

FIG. 8 is an exploded perspective view of an arrangement portion of operation buttons in the decorative frame.

FIG. 9 is a vertical cross-sectional view of the arrangement portion of the operation button in the decorative frame.

FIG. 10 is a perspective view showing a state where the upper lid is turned upside down.

FIG. 11 is a perspective view of a mechanical deck of the same.

FIG. 12 is an exploded perspective view of the eject mechanism portion of the same.

FIG. 13 is an explanatory diagram of an engagement state between an engaging claw of an eject lever and a concave portion of a disc cartridge in the eject mechanism section.

FIG. 14 is a side view for explaining the operation of the eject mechanism portion, showing a state before the disc cartridge is inserted.

FIG. 15 is a side view for explaining the operation of the ejecting mechanism portion, showing a state in which the disc cartridge is inserted.

FIG. 16 is a side view for explaining the operation of the ejecting mechanism portion, showing a state in which the disc cartridge is mounted in a predetermined mounting portion.

FIG. 17 is a side view for explaining the operation of the eject mechanism unit in the same state, in which the disc cartridge has been ejected.

[Explanation of symbols]

1 disc player 47 cartridge holder 58 Ejector lever 62 Engaging claw 62a Undercut part 61 tension coil spring 71 Vertical wall (guide wall) 101 disk cartridge 103 recess

Claims (4)

(57) [Claims] 1. A cartridge holder into which a disc cartridge is inserted and held, and an engaging claw, which is attached to the cartridge holder so as to be movable in the direction of inserting and removing the disc cartridge, has a projection provided on a part of the disc cartridge. An eject lever that engages with the recess is provided, and an engaging claw of the eject lever has an undercut portion that is cut out in a concave shape at the root portion of the surface of the surface facing the recess of the disk cartridge on the disc cartridge releasing direction side. Ejection mechanism of a disk cartridge characterized by being performed. 2. The guide wall according to claim 1, further comprising a guide wall for guiding the eject lever when the disc cartridge is inserted so as to prevent the engaging claw from coming off from the recess of the disc cartridge. Disk cartridge eject mechanism. 3. A cartridge holder rotatably provided with respect to a chassis, into which a disk cartridge is inserted and held, and a reproducing means for reproducing with respect to a disk cartridge attached to the chassis and inserted into and held in the cartridge holder. The ejector lever is attached to the cartridge holder so as to be movable in the inserting / removing direction of the disc cartridge, and an engaging lever protruding from a part thereof engages with a concave portion of the disc cartridge. The reproducing device is characterized in that the engaging claw is formed with an undercut portion which is cut out in a concave shape at a root portion of a surface of the engaging claw facing the concave portion of the disc cartridge on the side toward the disc cartridge releasing direction. 4. The eject lever is provided when the cartridge holder moves above the chassis.
4. The reproducing apparatus according to claim 3, wherein when the disc cartridge is moved in the detaching direction, the disc cartridge provided with a concave portion with which the engaging claw is engaged is moved in the detaching direction.