JPH048540Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a disk cartridge case that is attached to a disk playback device together with a disk when playing back a disk stored therein.

[Conventional technology]

The applicant has previously developed a device for reproducing disks using this type of disk cartridge case, in which a rack gear is formed on the case, a loading pinion gear is provided on the device, and when the device is loaded into the case, the upper case is removed from the device. A device (Utility Application No. 59-70478) was provided, in which the rack gear is inserted into the housing, the rack gear is engaged with the pinion gear, and the pinion gear is driven to move the case to a fixed position. By the way, in this device, the rack gear formed on the case was a linear rack gear with a constant pitch, and the pinion gear was a gear with simply a plurality of teeth formed along a pitch circle. When meshing with a pinion gear, the leading tooth of the rack gear does not always mesh with a specific tooth of the pinion gear under the same conditions, and the meshing conditions between the rack gear and pinion gear differ each time the case is inserted, and sometimes these gears There was a problem in that the meshing of the parts could not be done smoothly in some cases.

Therefore, in order to solve the above-mentioned problem, the applicant proposed a device (Utility Application No. 150098/1987) in which the initial meshing between the rack gear and the pinion gear is performed under the same conditions as possible.

FIGS. 9 and 10 are diagrams showing the configuration of the proposed apparatus. In these figures, reference numeral 1 indicates a disk cartridge case, and reference numeral 2 indicates a loading pinion gear provided in a device for reproducing disks. The case 1 houses a disk (not shown), and has a rack gear 3 formed on its side. Gear 2 is designed to be rotated by a drive source (not shown), and case 1 is installed inside the device.
When inserted, it engages with the rack gear 3 and moves the case 1 in the direction of arrow _P1 .

The feature of this device lies in the configuration of gear 2. That is, the gear 2 has a notch 9 extending in the circumferential direction of the gear 2 at the base end side of the teeth 5 to 8, in which the teeth 4 and 5 are formed.
is formed, and the wall portion 10 on which the teeth 5 to 8 are formed is cantilevered by the main wall portion 11. Moreover, the height of teeth 5 and 6 is that of teeth 4 and 7.
The tooth tips 5a, 6 are formed lower than other teeth including 8.
a is formed to approximately match the pitch circle 12 of the other teeth. With this configuration, the wall 10 can be deflected in the direction of arrow _P2 .

When the case 1 is inserted into the equipment of this device, the meshing of the rack gear 3 and the gear 2 is done as follows.

That is, the gear 2 of the device is positioned so that the teeth 4 to 8 meet the rack gear 3 of the case 1, and normally, the teeth 4 touch the rack gear 3 at the beginning of the teeth meshing.
It is positioned so as to mesh with the leading tooth 13 of. When case 1 is inserted in the direction of arrow _P1 , gear 2
is in the normal position, the teeth 13 of the rack gear 3 come into contact with the teeth 4 of the gear 2 (since the teeth 5 and 6 are formed short, they first come into contact with the teeth 4), and then these teeth 4 first come into contact with the teeth 4. , 13 mesh with each other, then teeth 5,
6. meshes with the teeth 14 and 15, and the initial meshing of these teeth is made smooth. On the other hand, it is assumed that gear 2 slightly moves in the direction of arrow _P3 and deviates from its normal position due to vibration or the like being applied to the device. In this case, just by separating the teeth 5 and 13, the teeth 4 first come into contact with the teeth 13, and then the succeeding teeth mesh with each other smoothly, just as in the normal case described above. The meshing is done.
Further, when the gear 2 is positioned slightly shifted in the direction of arrow _P4 , the teeth 13 of the rack gear 3 first come into contact with the tips 5a of the teeth 5 of the gear 2. At this time, the tooth 5 is formed so that the wall portion 10 on which the tooth 5 is formed is indicated by the arrow.
P By bending in _two directions, it retreats in the same direction.
Thus, the tooth 13 advances in the direction of arrow _P1 and comes into contact with the tooth 4 while causing the tooth 5 to retreat in the above-mentioned direction. Therefore, in this case as well, teeth 13 and teeth 4 will first mesh with each other.

Thus, in this device, the rack gear 3
During the initial meshing between the gear 2 and the gear 2, there is a high possibility that the leading tooth 13 of the rack gear 3 will first mesh with the teeth 4 of the gear 2, and it is easy to keep the initial meshing of the teeth constant.

[Problem that the invention attempts to solve]

By the way, in the disk playback device using the disk cartridge case 1 described above, when the gear 2 is shifted in the direction of the arrow _P4 , the leading tooth 13 of the rack gear 3 moves the tooth 5 of the gear 2 backward in the direction of the arrow _P2 . Since the leading tooth 13 meshes with the tooth 4, when the leading tooth 13 and the tooth 5 come into sliding contact, the gear 2 may rotate due to friction between the tooth 13 and the tooth 5. There was a drawback that the leading tooth 13 and the tooth 4 did not always mesh initially. Further, when the leading tooth 13 comes into contact with the tooth 5, these teeth 13, 5 slide relative to each other, so there is a drawback that these teeth 13, 5 may be damaged.

This idea was developed by making the initial meshing conditions constant when the rack gear meshes with the pinion gear and preventing damage to each gear in the disk cartridge case where the rack gear meshes with the loading pinion gear of the equipment as described above. The problem is how to prevent this.

[Means for solving problems]

This invention is based on a disk cartridge case in which a rack gear is engaged with a loading pinion gear of a device for reproducing disks as described above. A notch or groove is formed to synchronize the initial meshing between the rack gear and the pinion gear.

〔Example〕

An embodiment of this invention will be described with reference to FIGS. 1 to 8.

1 to 4 are diagrams showing the structure of a disk cartridge case A according to this invention,
FIGS. 5 and 6 are diagrams showing the configuration of device B that plays back a disc using case A.

First, with reference to Figures 1 to 4, Case A
To explain the structure of case A, this case A is a plate-like body that has a rectangular shape in plan view as a whole and has a constant thickness. This case A includes a frame 20 having a disk arrangement section 19, and a frame 20 having a disk arrangement section 19.
0, a case lid 21 is attached to cover the top side of the disk placement part 19, a bottom plate 22 is fixed to both frames 20 so as to cover the bottom side of the disk placement part 19, and the frame 20 and the bottom plate 22 are connected to each other. A shutter plate 23 is arranged between the disks 1 and 23, and is configured such that the disk a can be stored in the disk placement section 19 in a playable state. The case lid 21 fits into the grooves 24, 2 of the frame 20.
The disk placement portion 19 can be opened and closed by rotating it in the directions of arrows P ₅ and P ₆ about the bosses 25 and 25 fitted in the disks 4 . Thereby, the disk a in the disk arrangement section 19 can be replaced. In the center of the case lid 21, there is a disc tapillizer that cooperates with a turntable provided in equipment B to hold disc a when case A is loaded into equipment B with disc a stored therein. 26 is attached. A turntable insertion hole 27 and a pick up head insertion hole 28 are formed in the bottom plate 22. The shutter plate 23 rotates in the directions of arrows P ₇ and P ₈ to open and close the pick up head insertion hole 28 when a shutter lever 23 a projecting outward from one side of the frame 20 is operated.

Both sides of frame 20 (both sides of case A) 2
Guide grooves 32a and 32b are formed in the guide grooves 9a and 29b from the front end surface 30 to the vicinity of the rear end surface 31, and a loading rack gear 33 is formed on the bottom surface of the guide groove 32a. Furthermore, as shown in FIG. 1, a synchronization notch 34 is formed at the front end of the lower surface of the frame 20 on the side where the rack gear 33 is formed. The cutout portion 34 is
This is a portion obtained by cutting out the front end of the lower surface of the frame 20 by a certain dimension along the side surface 29a, and the stepped portion 35 thereof is located slightly forward from the starting end of the rack gear 33 (the position where the leading tooth is located). This notch 34 is for synchronizing when the rack gear 33 meshes with a pinion gear provided on the device B when the case A is inserted into the device B.

Next, the configuration of device B will be explained with reference to FIGS. 5 to 8. 5 and 6, the reference numeral 40 is a chassis, and this chassis 4
0, a disk drive motor 41 is attached to the center of its lower surface, and a feed loading motor 42 is attached to one end thereof. A rotating shaft of the disk drive motor 41 projects upward from the upper surface of the chassis 40, and a turntable 43 is connected to the upper end of the rotating shaft. Further, a disk cartridge case holder 44 is supported on the upper side of the chassis 40, and an optical pickup head 45 is provided on the lower side. The holder 44 is supported to be vertically movable with respect to the chassis 40, and guide walls 46a, 46b, 47a for guiding the case A in the directions of arrows _P9 and _P10 are provided on both left and right sides of the upper surface of the holder 44.
47b is formed. Further, a loading pinion gear 48 is supported by the holder 44 so as to face the passage of the case A.

Details of the gear 48 are shown in FIGS. 7 and 8. As shown in these figures, the gear 48 has a wall portion 50 with no teeth formed between a plurality of teeth formed along the pitch circle 49, and a wall portion 50 with no teeth formed on the lower surface of the wall portion 50. A synchronization protrusion 51 is formed that protrudes outward in the radial direction of this gear 48. Further, in the portion where the wall portion 50 and the teeth 52 to 54 are formed, there is a groove that separates the wall portion 50 and the teeth 52 and extends in the circumferential direction of the gear 48 on the base end side of the teeth 52 to 54. A notch 55 is formed. Based on this configuration, the wall portion 56 on which the teeth 52 to 54 are formed is cantilevered by the main wall portion 57, and this wall portion 56 can be bent in the direction of arrow _P11 . . Further, the height of the tooth 52 is the same as that of the tooth 52.
It is formed lower than the other teeth including 3 and 54, and its tip is formed to approximately match the pitch circle 49 of the other teeth. The above-mentioned synchronization protrusion 51 is
When the case A is inserted into the case A, the gear 48 cooperates with the synchronization notch 34 of the case A as described later.
This synchronizes the initial meshing between the teeth of the rack gear 33 and the teeth of the rack gear 33.

In the above configuration, the holder 44 holds the case A containing the disk a during disk playback, and moves from the upper limit position (disc non-playback position) to the lower limit position (disc playable position) to play the disk a. It is placed on a turntable 43. In addition, the loading pinion gear 48 is connected to case A when loading or ejecting case A.
The case A is meshed with the rack gear 31 and moves the case A in the directions of arrows P ₉ and P ₁₀ . The optical pick-up head 45 moves in the direction of arrow _P9 during disk reproduction to read signals recorded on the disk. The holder 44, pinion gear 48, and optical pickup head 45 are selectively driven by a feed loading motor 42.

To play disk a using case A and device B described above, store disk a in case A, and then move case A to guide wall 46a of device B.
Holder 4 using 46b, 47a, 47b as guides
4, and mesh the tip of the rack gear ₃₃ of case A with the pinion gear 48. In this case, the case A is mounted on the holder 4 with the case lid 21 facing upward and the front end surface 28 facing in the direction of arrow _P9 .
Insert within 4. When the case A is inserted as described above, the feed loading motor 42 starts and the pinion gear 53 rotates, and this gear 53 moves the case A in the direction of arrow _P9 . When the disk a in the case A approaches the upper part of the turntable 43, the holder 44 descends and reaches the lower limit position, and accordingly the turntable 43 enters the case A through the turntable insertion hole 25, and the disk 23 is placed on the turntable 43,
A disk a is held between the turntable 43 and the disk stabilizer 24. When the loading of case A is completed in this manner, the pinion gear 48 stops rotating.

If a command is given to device B to play the disk, the disk drive motor 40 rotates and the turntable 43 rotates, thereby causing the disk a to be played back.
rotates together with the disk stabilizer 24, and the optical pick-up head 45 moves in the direction of arrow _P9 while reading the signal recorded on the disk a through the pick-up head insertion hole 26 to remove the disk a.
is regenerated.

When the case A is inserted into the holder 44 during the above disc playback, the rack gear 33 of the case A can always be smoothly engaged with the pinion gear 48 under the same conditions.

Below, the effect of case A on this point will be explained in Section 7.
To explain with reference to FIGS.
When the gear 48 is in a standby state before playing a disk, the gear 48 has its synchronizing protrusion 51 orthogonal to the insertion direction of the case A (direction of arrow _P9 ) and projects onto the insertion path of the case A. positioned. Here, when case A is inserted in the direction of arrow _P9 ,
If the gear 48 is in the normal position, case A
The stepped portion 35 of the synchronizing notch 34 formed in the synchronizing notch 34 engages with the synchronizing protrusion 51 of the gear 48 at a predetermined position, and this stepped portion 35 pushes the protrusion 51 in the direction of arrow P9, causing the gear 48 to move in the direction of the arrow _P9 . P Rotate in ₁₂ directions. At this time, the leading tooth 60 of the rack gear 33 meshes between the wall 50 of the gear 48 and the tooth 52, then the tooth 61 meshes between the teeth 52 and 53, and the succeeding tooth meshes with the gear 48. mesh with the succeeding teeth. Thus, each tooth of the rack gear 33 corresponds to a gear 48.
It meshes smoothly with each tooth. On the other hand, assume that when case A is inserted into device B, gear 48 rotates in the direction of arrow _P12 or _P13 and deviates from its normal position due to vibrations etc. being applied to device B. . In this case, when case A is inserted into device B, step 35 of synchronization notch 34 engages with synchronization protrusion 51 in front of or behind the predetermined position, and this step 35 engages with protrusion 51. Push in the direction of arrow _P9 to rotate gear 48 in the direction of arrow _P12 . In this case as well, since the step portion 35 and the protrusion 51 engage with each other, the teeth 60, 61 of the rack gear 33
... and the wall portion 50, teeth 52, 53... of the gear 48 are corrected to the same positional relationship as when the gear 48 is placed in the normal position, and the rack gear is adjusted in the same way as in the above case. Teeth 33 and gear 48 mesh smoothly.

By the way, the configuration of the gear 48 is similar to the ninth gear mentioned above.
Similar to the gear 2 shown in FIGS. 1 and 10, the wall portion 56 on which the teeth 52 to 54 are formed can be bent in the direction of arrow _P1 , and the height of the teeth 52 is set to a height that substantially matches the pitch circle 49. It's summery. Therefore, this gear 48 also has the same effect as the gear 2 shown in FIGS. 9 and 10. For example, the teeth of the rack gear 33 and the gear 48
If the positional relationship of each tooth is slightly deviated due to vibration etc. during the initial meshing with the teeth _of
By bending in the direction, the above-mentioned initial engagement can be performed smoothly.

As mentioned above, in this case A,
The rack gear 33 can always be smoothly engaged with the gear 48 under the same conditions.

In the above embodiment, the synchronization notch 34 is formed in the case A, and this notch 34 is engaged with the synchronization protrusion 51 of the gear 48, but instead of this configuration, the case A is A groove is formed that is closed at one end in the extending direction, and this groove is connected to the protrusion 51.
It may be made to engage with.

[Effect of idea]

According to this invention, in a disk cartridge case in which a rack gear is engaged with a loading pinion gear of a device that regenerates a disk, a position in front of the starting end of the rack gear is engaged with a part of the pinion gear, and the rack gear is engaged with a part of the pinion gear. Since a notch or groove is formed to synchronize the initial meshing between the case rack gear and the pinion gear, the initial meshing conditions between the rack gear of the case and the pinion gear can always be kept constant, and the initial meshing of these gears can be performed smoothly. This prevents the gears from being forced into engagement, thereby preventing damage to the gears.

[Brief explanation of the drawing]

1 to 4 are diagrams showing the structure of a disk cartridge case A shown as an embodiment of this invention, in which FIG. 1 is a perspective view of the case A with its back surface facing up, and FIG. Figure 3 is a perspective view of case A with the surface facing up, Figure 3 is a perspective view of case A with the case lid open, Figure 4 is an exploded perspective view of case A, and Figure 5 is a disk FIG. 6 is a plan view of device B that reproduces the device B, FIG. 6 is a side view taken from the line in FIG. 8 is a perspective view of FIG. 7, FIG. 9 is an explanatory diagram showing a state in which a conventional disk cartridge case is loaded into a device, and FIG. 10 is an enlarged view of the main part of FIG. 9. A... Disk cartridge case, B... Equipment, a... Disk, 33... Rack gear, 34
...Notch (notch for synchronization), 48...Loading pinion gear.

Claims (1)

[Scope of utility model registration request] A disk cartridge case that is configured to store disks in a replaceable and reproducible state, and has a rack gear formed on its surface that meshes with a loading pinion gear for case movement provided in a device that regenerates disks, A notch or groove is formed at a forward position of the starting end of the rack gear to engage with a part of the loading pinion gear and to synchronize the initial meshing between the rack gear and the loading pinion gear. Disc cartridge case.