JP2599396Y2 - Disk media reader - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reading recorded information on a disk medium such as an optical disk, and more particularly, to an apparatus for reading a disk medium contained in a cartridge.

[0002]

2. Description of the Related Art As is well known, in a disk medium such as an optical disk, the disk medium is housed in a resin cartridge, and each cartridge is loaded into a reading device to read information recorded on the disk medium. A conventional reader for such a purpose has the following structure.

That is, the conventional reading apparatus includes a main body frame having a collet spindle device for rotatingly driving a disk medium such as an optical disk and an access mechanism of a pickup for reading information recorded on the disk medium. A cartridge holder capable of loading a cartridge accommodating the disk medium is vertically movably mounted on the upper part of the cartridge. Therefore, in the reading apparatus having such a structure, a vertical movement mechanism for detecting the loading of the cartridge into the cartridge holder and lowering the cartridge holder toward the main body frame is provided. Detector to detect the
It is necessary to provide a vertical motion motor and a cam mechanism for converting the rotational motion of the vertical motion motor into a vertical linear motion.

[0004]

For this reason, according to the conventional reader, the use of expensive detectors and up-and-down motors,
A complicated cam mechanism having a large number of parts increases the manufacturing cost, and has a problem in durability and reliability due to the complicated mechanism.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional reader, the present invention provides a disk medium reader which is inexpensive to manufacture, has a simple structure, and has excellent durability and reliability. It is in.

[0006]

In order to achieve this object, the present invention provides a body frame having a collet spindle device for rotating a disk medium such as an optical disk and an access mechanism of a pickup for reading recorded information of the disk medium. And a cartridge holder that can be loaded with a cartridge containing the disk medium.In the disk medium reader, the cartridge can be inserted from the front end face, and can be raised about the rear fulcrum axis of the body frame. A cartridge holder supported and urged by a holder urging spring in an elevation angle direction; a bezel with a knob fixed to a front portion of the cartridge holder; and a knob provided between the main body frame and the cartridge holder. The cartridge holder is moved to the play position where the cartridge holder is It proposes a reader of the disk medium and a push-push locking device for locking the 択的.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The illustrated embodiment is an example in which the present invention is applied to an optical disk reader.
Frame 1 resin molded as a chassis having
It has.

[0010] As shown in FIGS. 2 and 3, a collet spindle device 2 for rotating and driving an optical disc Y housed in a cartridge X is provided inside the main body frame 1.
A sub-frame 2 for mounting an access mechanism 30 for accessing a pickup, which will be described later, with respect to recording tracks of the optical disk Y and the optical disk Y, and a printed circuit board 3 on which circuit elements of a reader are mounted.

The collet spindle device 20 includes a vertical drive motor 21 fixed to the sub-frame 2.
A collet spindle 22 that is inserted into the center hole y of the optical disc Y and rotationally drives the optical disc Y is fixed to the output shaft of the drive motor 21. The access mechanism 30 shown in detail in FIG. 2 includes a carrier 32 that can move along a guide rod 31 on the main body frame 1 that extends parallel to the radial direction of the collet spindle 22. On the surface, a pickup 33 standardized on the surface of the optical disk Y is mounted.

An access motor 34 constituting a part of the access mechanism 30 is fixed to the subframe 2, and a driven member 35 having a rack 35a is fixed to a side of the carrier 32. A reduction gear train 37 composed of a plurality of spur gears is interposed between the rack 35a and the drive gear 36 of the access motor 34, and the carrier 32 moves along the guide rod 31 by the reduction gear train 37. Be moved.

As shown in FIG. 3, a horizontal rear fulcrum shaft 4 is integrally formed on the rear surface of the main body frame 1,
With respect to the rear fulcrum shaft 4, the cartridge X
The rear part of the cartridge holder 5 in which the cartridge can be loaded is supported so as to be able to descend. The cartridge holder 5 formed by bending a metal plate into a box shape into which the cartridge X can be inserted is provided with a pair of holder biasing springs 6 provided between the cartridge holder 5 and the main body frame 1.
1 and 2, the maximum elevation position of the cartridge holder 5 is regulated by a movable limit stopper 7 shown in FIG.

At the front end of the cartridge holder 5,
A frame-shaped bezel 9 having an insertion opening 8 into which a cartridge X containing an optical disk Y can be inserted is fixed. The bezel 9 made of resin is a knob 9 to which a fingertip can be applied.
a, the cartridge holder 5 is depressed to the depression position (play position) shown in FIGS. 5 and 6 by pressing down the knob 9a against the force of the holder urging spring 6. can do.

As shown in FIGS. 2 and 5, between the front portion of the main body frame 1 and the front portion of the bezel 9, a push / push lock for selectively locking the cartridge holder 5 and the bezel 9 at the play position is provided. An apparatus 40 is provided. In the illustrated embodiment, a joint 9b of a push / push lock device 40 having a heart cam formed on the back is integrally formed at the lower center in the width direction of the bezel 9, and the bezel 9 is located at the play position as shown in FIG. The front surface of the joint portion 9b is covered with a front apron 1b integrally formed on the front portion of the main body frame 1. That is, as shown in FIG. 5, when the cartridge holder 5 and the bezel 9 are in the play position, the upper end of the apron 1 b is located in front of the insertion opening 8 of the bezel 9. Inadvertent withdrawal of the cartridge X is prevented, and an accident that another cartridge X is inserted into the cartridge holder 5 while maintaining this play state is prevented in advance.

In order to prevent the lower side 9c of the bezel 9 from being deformed or destroyed by an external force from the push / push lock device 40 applied to the bezel 9 in the play state, a metal round bar is provided on the lower side 9c. A rigid bar indicated as 10 is attached over the entire width of the lower side 9c. That is, since the metal round bar 10 is inserted from the side in the width direction into the reinforcing hole 11 formed in the lower side portion 9c of the bezel 9 while extending in the width direction, the metal round bar 10 is inserted from the joint portion 9b. The external force from the push / push lock device 40 that is applied is applied to the lower side 9 c of the bezel 9 via the metal round bar 10.
Since the bezel 9 is dispersed throughout, the bezel 9 is prevented from being broken due to abnormal deformation of the bezel 9 or excessive stress. It is obvious that the metal round bar 10 in the illustrated embodiment may be replaced with another rigid member.

FIGS. 7 and 8 show details of the push / push lock device 40 described above. The push / push lock device 40 includes a heart cam 41 formed on the back surface of the joint portion 9b and a heart cam 41 formed around the heart cam 41. The cam groove 42 to be formed, the base 43a is fixed to the mounting wall 12 of the front apron 1b, and the tip hook 43b is connected to the cam groove 4
2 and a lock pin 43 driven by the lock pin 43.

Referring to FIG. 7, the relationship between the heart cam 41 and the tip hook 43b of the lock pin 43 will be described.
As the cartridge holder 5 is pushed down with respect to the main body frame 1, the tip hook 43b of the lock pin 43 is circulated in the cam groove 42 around the heart cam 41 in the direction of the arrow (counterclockwise). That is, when the cartridge holder 5 is pressed down against the urging of the holder urging spring 6, the tip hook 43b of the lock pin 43 moves upward with respect to the heart cam 41 in FIG. 7 and the knob 9a of the bezel 9 is moved. When released, the tip hook 43b moves to the lock portion 41a of the heart cam 41 as shown by the two-dot chain line. Therefore, by the engagement between the tip hook 43b and the lock portion 41a,
The cartridge holder 5 in which the cartridge X is loaded is locked at the downplay position shown in FIGS. Next, in order to take out the cartridge X containing the optical disk Y, when the knob 9a of the bezel 9 is pressed again, the tip hook 43b of the lock pin 43 is disengaged from the above-described lock portion 41a and moves to the left of the lock portion 41a. Therefore, when the knob 9a is released, the cartridge holder 5 returns to the cartridge loading position (cartridge removal position) in FIGS. 2 and 4 by the force of the holder urging spring 6. In this case, the tip hook 43b of the lock pin 43 passes through the left passage of the cam groove 42 and returns to the position shown by the solid line in FIG.

As shown in FIG. 2 and FIG.
In order to mount the base 43a of the third apron 1b, a mounting groove 13 capable of accommodating the base 43a of the lock pin 43 formed in an arc shape is formed on the lower surface and the back surface of the mounting wall 12 of the front apron 1b. The fixing screw 14 prevents the mounting spring 15 for fixing the mounting portion 15 a to the mounting wall 12 from being pulled out of the mounting groove 13.

That is, the mounting spring 15 formed of a thin metal plate
In the mounting portion 15a, a positioning hole 16 corresponding to the positioning protrusion 12a protruding from the mounting wall 12 and a fixing hole 17 into which the fixing screw 14 can be inserted are formed. The mounting spring 15 has an elastic pressing portion 15b which is bent at a right angle from the mounting portion 15a.
5b is elastically applied to the surface near the tip of the lock pin 43, and the tip hook 43b of the lock pin 43 is maintained in the cam groove 42 by the urging of the pressing portion 15b.

A push / push ejector 50 is mounted inside the cartridge holder 5 near the rear part of the main body frame 1 to contact the end face of the cartridge X and selectively push out the cartridge X from the cartridge holder 5. Details of the push switch shown in FIGS.
The push ejector 50 is connected to the cartridge holder 5.
A pressing head 53 pressed leftward in FIG. 3 by a compression spring 52 is housed inside the resin case 51 so as to be slidable in the left-right direction in FIG. Have been.

The push / push ejector 50 has a lock pin 54 having a base 54a fixed to the resin case 51. A tip hook 54b of the lock pin 54 has a heart cam 55 formed on the lower surface of the pressing head 53. Is located in a cam groove 56 surrounding it. The functions of the lock pin 54, the heart cam 55, and the cam groove 56 are the same as those of the lock pin 43, the heart cam 41, and the cam groove 42 of the push / push lock device 40 described above.
Detailed description is omitted.

In a preferred modification of the present invention, the push / push ejector 50 in the illustrated embodiment can be realized by a well-known eject mechanism operated by an eject button provided on the bezel 9.

At the front of the cartridge holder 5, a front cartridge holder 60 for pressing down the cartridge X loaded in the cartridge holder 5 to stabilize the position of the cartridge X in the cartridge holder 5 is provided. It is provided on the upper wall 5a. As shown in FIG. 1, front cartridge holders 60 provided on both sides of the front of the cartridge holder 5 are provided with bases 6 using washers 61.
2a has a leaf spring 62 fixed to the caulking projection 63 of the upper wall 5a, and a tip contact portion 62b of the leaf spring 62
The cartridge holder 5 protrudes into the internal space of the cartridge holder 5 from a notch 16 formed in the upper wall 5a of the cartridge holder 5 shown in FIG.

On the other hand, between the rear part of the cartridge holder 5 and the rear part of the main frame 1, a rear cartridge holder 70 for pressing the cartridge X loaded in the cartridge holder 5 is provided. Front cartridge holder 60
Similarly, the rear cartridge retainers 70 provided on both sides of the rear portion of the cartridge holder 5 are provided with mounting ears 72 which are folded up from the upper wall 5a of the cartridge holder 5 using the support pins 71.
A pressing member 73 rotatably supporting an intermediate portion, and an action member 74 facing an urging piece 73a cut and raised from the pressing member 73 made of an elastic metal plate.

That is, on the rear surface of the main body frame 1, an action member 74 is formed integrally with an upper end portion facing the tip of the biasing piece 73 a of the pressing member 73.
The spring portion 73b of the pressing member 73, which is opposite to the portion a, protrudes into the internal space of the cartridge holder 5 from the release window 17 formed in the upper wall 5a of the cartridge holder 5.

Accordingly, the front contact surface 60b of the front cartridge holder 60 is provided on the front surface of the cartridge X loaded in the cartridge holder 5, and the spring portion 73b of the pressing member 73 is provided on the rear surface of the cartridge X. Since the cartridge X is resiliently contacted, the position of the cartridge X at the cartridge loading position and the play position is stabilized, and the push / push ejector 50 of the collet spindle device 20 and the collet of the access mechanism 30 are placed on the optical disk Y accommodated in the cartridge X. The spindle 22 can operate reliably.

Since the optical disk reader according to the illustrated embodiment has the above-described structure, it can be operated as follows. First, to load the cartridge X containing the optical disk Y into the optical disk reader,
As shown in FIG. 1, the cartridge X may be inserted into the cartridge holder 5 from the insertion opening 8 of the bezel 9. When the cartridge X is inserted, the end face of the cartridge X comes into contact with the pressing head 53 of the push / push ejector 50 as shown in FIG.
2, the tip hook 43b of the lock pin 54 of the push / push ejector 50 is locked by the lock portion 41a of the heart cam 41 as shown in FIG. The cartridge X does not fly out of the cartridge. In this insertion step, since the cartridge X is pressed downward by the front cartridge presser 60 and the rear cartridge presser 70, the cartridge X is completely loaded into the cartridge holder 5 without "rattle".

Thereafter, the bezel 9 of the cartridge holder 5 is
When the fingertip is applied to the knob 9a and pressed downward against the force of the holder urging spring 6, the push / push lock device 4
Although the tip hook 43b of the lock pin 43 advances in the cam groove 42, the bezel 9 is released after the knob 9a is sufficiently pressed down, as shown in FIG. The hook 43b engages with the lock portion 41a of the heart cam 41, and the push / push lock device 4
0 locks the cartridge holder 5 to the play position as shown in FIGS. In this play position, as shown in FIG. 5, the front apron 1b of the main body frame 1
Since the upper end of the cartridge X is located in front of the cartridge X in the play position, an erroneous operation of loading another cartridge X into the cartridge holder 5 by mistake, or the loaded cartridge X accidentally jumps out of the cartridge holder 5 may occur. Is blocked.

In the same play position, the main frame 1
The force of the holder urging spring 6 provided between the cartridge holder 5 and the cartridge holder 5 acts on the bezel 9 via the joint 9b. Since the bezel 9 is reinforced by the metal round bar 10, the bezel 9
The force of the holder urging spring 6 applied to the lower side 9c of the bezel 9
Since the bezel 9 is dispersed throughout, the destruction and deformation of the bezel 9 can be prevented. Of course, at this play position, the collet spindle 22 of the collet spindle device 20 is engaged with the center hole y of the optical disc Y accommodated in the cartridge X, and the recording information of the optical disc Y is read by the access of the pickup 33 of the access mechanism 30. You.

When the knob 9a of the bezel 9 is depressed again after reading the recorded information, the lock pin 43 of the push / push lock device 40 comes off the lock portion 41a. When the knob 9a is released, the holder urging spring 6 is released. The cartridge holder 5 returns to the position shown in FIGS. Therefore, the user pushes the cartridge X with his / her finger on the front end face of the cartridge X and pushes and ejects the cartridge X.
, The lock pin 54 of the push / push ejector 50 comes off the heart cam 41, and the cartridge X is pushed out of the bezel 9 by the stored force of the compression spring 52.

[0030]

As is apparent from the above description, according to the present invention, a cartridge holder which can be raised and lowered about the rear fulcrum shaft is provided at the upper part of the main body frame, and the cartridge holder is selectively provided between the cartridge holder and the main body frame. Since a push / push lock device capable of locking the cartridge holder at the play position is provided, a robust disk medium reading device with low manufacturing cost and high durability can be provided.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an optical disk reader according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a front portion of the optical disk reader at a cartridge loading position.

FIG. 3 is an enlarged cross-sectional view of a rear part of the optical disk reader at a cartridge loading position.

FIG. 4 is an enlarged cross-sectional view of the rear part of the optical disk reader in a state where the cartridge is completely loaded.

FIG. 5 is an enlarged sectional view of a front portion of the optical disc reader in a play position.

FIG. 6 is an enlarged cross-sectional view of the rear part of the optical disk reader in a play position.

FIG. 7 is a rear view of the push / push lock device of the optical disc reader.

FIG. 8 is an exploded perspective view of a main part of the push / push lock device.

[Explanation of symbols]

 X Cartridge Y Optical disk (disk medium) 1 Body frame 4 Rear fulcrum shaft 5 Cartridge holder 8 Insertion port 9 Bezel 9a Knob 20 Collet spindle device 30 Access mechanism 33 Pickup 40 Push / push lock device

Claims (1)

(57) [Scope of request for utility model registration] 1. A body frame including a collet spindle device for rotatingly driving a disk medium such as an optical disk and a pickup access mechanism for reading recorded information of the disk medium, and a cartridge holder capable of loading a cartridge containing the disk medium. In the disk-medium reading device comprising: The cartridge holder, a bezel with a knob fixed to the front of the cartridge holder, and a play position provided between the main body frame and the cartridge holder and in which the cartridge holder is depressed by pushing down the knob. With push / push lock device An apparatus for reading a disk medium, comprising: