JPH0462146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a disc-shaped recording medium conveying device for a player of a disc-shaped recording medium, for example, a digital audio compact disc.

Background Art and Problems Compact disc players (hereinafter referred to as CD players) use a built-in carrier system to load the disc, for example, a system in which the disc is placed on a pull-out disc table. However, this type of system requires space in front of the player to pull out the disc table, which causes space problems, especially when installing a CD player in a car or the like. Because of this problem, it is preferable to implement a slot-in method in which the disk is loaded directly.In this case, the chuck slide method, guide roller method, etc. can be considered as the means for transporting the disk, but in either case, the amount of disk movement can be freely set. Moreover, when loading a disk, the disk surface must be held between the fingers when inserted, which may stain or damage the disk surface.

In addition, the guide roller method generally uses a pair of rollers and inserts a conveyor plate between them for conveyance. However, since the rollers have the same diameter throughout, the entire surface of the conveyor plate Therefore, there is an inconvenience that dust is likely to adhere to the surface of the conveyor plate and it is easily scratched by the rolling contact of the rollers.

Purpose of the Invention In view of the above, the present invention has been devised in order to convey a disc-shaped recording medium by simply placing the recording medium at a predetermined position, and only the peripheral edge of the recording medium is held between drive rollers and automatically moved to the required position. The present invention provides a disk-shaped recording medium conveyance device that can reliably convey the medium to the disk.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a disk-shaped recording medium conveying device having a drive roller that pinches and conveys an inserted disk-shaped recording medium. The diameter gradually increases toward the end so that the drive roller comes into contact with the periphery of the signal recording surface of the disk-shaped recording medium, which prevents staining or damage on the surface of the recording medium and ensures reliable conveyance to the desired position. This is how it was done.

Embodiments Hereinafter, embodiments in which a disk-shaped recording medium conveying device according to the present invention is applied to a disk loading mechanism of a compact disk player will be described with reference to the drawings.

In the figure, reference numeral 1 indicates a case for a compact disk, on the front side of which a frame-like panel 4 having an insertion slot 2 for a disk D and each operating member 3 is fitted.
Further, an opening/closing lid 5 is attached to the inside of the insertion opening 2 so that it can be pushed open by a disk D. This opening/closing lid 5
is locked by the locking mechanism 6 in the closed state, and when the lid is pressed from the outside and rotated slightly inward in the closed state, the locking mechanism 6 operates to release the lock and the opening/closing lid 5 is opened.

Reference numeral 11 denotes a frame installed in the case 1, on which a chassis 12 is fixed horizontally, a spindle motor 13 is attached to the center of the chassis 12, and a frame 11 is installed in the center direction from near one rear corner, that is, A kerf 14 is formed in the direction of the spindle motor 13,
An optical pickup 15 is moved along this kerf 14. Further, a chucking arm 16 is pivotally supported at the other rear corner of the chassis 12 so as to be able to be raised and lowered, and is always biased in the direction of lodging by a spring 17. Checking board 18 corresponding to 13
is rotatably attached. Further, on the front edge side of the chassis 12, there are a guide roller mechanism 19 for loading the disk D and a drive roller mechanism 2.
0 are attached at required intervals in the front-rear direction.

The guide roller mechanism 19 located on the front side consists of a fixed guide roller 19a and a movable roller 19b.The fixed guide roller 19a is supported by bearings 21 and 21' fixed to the tip of the frame 11 via a shaft 22a, and the movable guide roller 19b is supported by a shaft 22a. is frame 1
Arms 23 and 2 are pivotally connected to the arm 1 so as to be rotatable in the vertical direction and are constantly biased upward by a spring or the like.
The guide rollers 19a and 19b are rotatably supported at the tip of the guide roller 3' via a shaft 22b, and are vertically opposed to each other so as to be able to approach and separate.

The drive roller mechanism 20, which is disposed opposite to the guide roller mechanism 19 at a required distance behind the guide roller mechanism 19 configured as described above, is composed of a fixed roller 20a and a drive roller 20b. 24' via a shaft 25a, the drive roller 20b is supported by a roller drive mechanism 26 that moves vertically with respect to the frame 11 and is rotationally driven, and the fixed roller 20a
The object is moved towards and away from the object. The rollers 19a, 19b and 20a, 20b of the guide roller mechanism 19 and the drive roller mechanism 20 configured as described above have a small diameter at the center, gradually increase in diameter toward both sides, and have the same diameter at both ends. is formed.

That is, as shown in FIG.
b, 20a, 20b are central parts 19a ₁ , 19b ₁ , 2
Diameter d ₁ of 0a ₁ , 20b ₁ and both ends 19a ₂ , 19b ₂ ,
If the relationship with the diameter d ₂ of 20a ₂ and 20b ₂ is d ₁ < d ₂ , and the total length of the roller is l, the length of the center part is l ₁ , and the length between the inner sides of both ends is l ₂ , then l If ≧l ₂ >l ₁ ≧0, and both sides are symmetrical with respect to the feed center a, and the thickness of the disk D is t, then d ₂ −
The condition is that d ₁ ≧1/2t.

When the rollers 19a, 19b and 20a, 20b formed in this manner are brought into contact with each other, a gap h is created in the center, and a gap is formed that tapers in both directions from this gap.

The surface of each roller is made of a suitable elastic material such as rubber or soft plastic, and the shafts 22a, 2
2b, 25a, and 25b are formed integrally with the roller or are bonded to the roller and rotated together.

Next, the roller drive mechanism 26 will be explained with reference to FIG.

27, 27' are support plates pivotally supported by shaft pins 28, 28' on both sides of the front part of the frame 11 so as to be rotatable in the vertical direction, and are connected by a connecting plate 27''.
Bearings 29, 29' are located approximately in the center of both support plates.
is fixed, and both ends of a shaft 25b of the drive roller 20b are passed through and supported by this bearing, and this shaft 25
A gear 30 is fixed to a protrusion on one end side of b, that is, a protrusion on the side that is pivotally supported by one support plate 27, and a gear 32 fixed to a shaft 31a of a motor 31 attached to the support plate 27 and Pivotally supported intermediate gear 3
3 and 34, and the driving force of the motor 31 is transmitted to the drive roller 20b.
That is, the gear (hereinafter referred to as a drive gear) 30 and intermediate gears 33 and 34 fixed to the drive roller 20b are as follows.
Large diameter tooth portions 30a, 33a, 34a and small diameter tooth portion 3
0b, 33b, and 34b, the gear 32 of the motor 31 is meshed with the large-diameter tooth portion 33a of the first intermediate gear 33, and the small-diameter tooth portion 33b of the first intermediate gear
The large-diameter tooth portion 34a of the second intermediate gear 34 is engaged with the large-diameter tooth portion 34a of the second intermediate gear 34, and the small-diameter gear 34b of the second intermediate gear and the large-diameter tooth portion 30a of the drive gear 30 are engaged with each other, so that the driving force is transferred to the drive roller as described above. 20b. The support plates 27, 27' are provided with springs 35,
The driving roller 20b is always rotated upwardly by the roller 35' so as to be brought into pressure contact with the fixed roller 20a. Further, a support plate rotation gear 36 is pivotally supported at the tip of one of the support plates 27, and this gear also has a large-diameter tooth portion 36a and a small-diameter tooth portion 36b, and the large-diameter tooth portion 36a is connected to the driving gear 30. The small-diameter tooth portion 36b is engaged with the small-diameter tooth portion 36b so that a rotational force is applied to a lowering mechanism that lowers the support plate 27 against the biasing force of the spring 35.

This lowering mechanism is a segment gear arm 38.
The segment gear arm 38 is supported by a shaft pin 37 on the frame 11 corresponding to the distal end side of the support plate 27 so as to be rotatable toward and away from the support plate 27. The rack portion 38a is rotated toward the support plate by the spring 39, and the rack portion 38a is rotated by the support plate rotation gear 3.
Normally, it is meshed with the small diameter tooth portion 36b of No. 6.

Further, the plunger arm 40 is pivotally supported by the frame 11 at a central fulcrum, a pin 40a protruding from one end is engaged with the segment gear arm 38, and the other end is connected to the plunger 41. When rotated by the operation, the segment gear arm 38 is rotated in a direction away from the support plate 27 against the biasing force of the spring 39.

Moreover, on the inner side of the segment gear arm 38,
A groove 38b is formed almost parallel to the rack part 38a, and a guide groove 38c is formed from the upper part of the groove 38b to wide open in the direction of the rack part 38a. An engagement pin 42 is provided to protrude and come into sliding engagement with the groove 38b. Furthermore, arms 23 and 2 which pivotally support the movable guide roller 19b are mounted on both support plates 27 and 27'.
Engagement pieces 27a, 27 engaged with the upper edge side of 3'
a' is provided in a protruding manner, and the arm 23 is always pivoted upward by a spring or the like, and the upper edge side is engaged with the engaging pieces 27a, 27a', so that the arm 23 is engaged with the supporting plates 27, 27'.
It is rotated downward as the support plate 27 is rotated downward, but it can be rotated downward independently without being associated with the support plate 27. The arms 23, 23' are positioned upward when the support plates 27, 27' are rotated upward, so that the movable guide roller 19b is in contact with the fixed guide roller 19a.

Furthermore, an engaging piece 27b is provided protruding from the inner surface of the distal end of one of the support plates 27, and the other end 43c of the connecting arm 43 moves the chucking arm 16 up and down in conjunction with the lifting and lowering movements of the support plate 27. is engaged.

This connecting arm 43 has an intermediate portion 43a that is pivotally supported by the frame 11, one end portion 43b that extends into a tongue shape so as to correspond to approximately the center of the lower surface of the chucking arm 16, and the other end portion 43c. is formed to extend in the direction of the support plate 27, and its end face is formed as an engaging piece 27b.
It is configured to correspond to the bottom surface of the This connecting arm 43 is always pivoted upward by a spring 44 interposed between it and the frame 11, so that one end 43b is connected to the chucking arm 1.
6 and acts to restrict rotation due to the rotational biasing force of the spring 17 of the chucking arm 16 in the direction of collapse.

Next, the disc loading operation of the player of this example configured as described above will be explained.

First, when the disc D pushes the opening/closing lid 5 attached to the insertion opening 2 of the front panel 4 of the player case 1, the opening/closing lid 5 is rotated in conjunction with the opening/closing movement of the opening/closing lid 5, and the lid locking mechanism 6 is engaged. The provided switch 7 is turned on, the plunger 41 is operated, the plunger arm 40 is rotated, and the opening/closing lid 5 is fully opened by a lid opening/closing mechanism (not shown) interlocked with the lid locking mechanism 6. On the other hand, plunger arm 40
Due to the rotation of the segment gear arm 38, the segment gear arm 38 is rotated in a direction away from the support plate 27 against the biasing force of the spring 39, and the rack portion 38a and the support plate 27 are rotated.
The engagement with the small-diameter tooth portion 36b of the support plate rotation gear 36 is released, and this state is maintained.

Next, when the disk D is pressed between the rollers 19a and 19b of the guide roller mechanism 19, the movable guide roller 19b is moved downward via the arm 23,
The disk D is inserted with the distance between both rollers widened, and the roller 20 of the drive roller mechanism 20 located behind it passes through the guide roller mechanism 19.
When it reaches between a and 20b (Fig. 9A), the optical switch 8 disposed at this part is turned on and the motor 3 is turned on.
1 is rotated forward. The driving force of this motor 31 is transferred from a gear 32 fixed to a motor shaft 31a to an intermediate gear 3.
3 and 34 to the gear 30 fixed to the shaft 25b of the drive roller 20b.
b is rotated in the feeding direction of the disk D (arrow b direction in FIG. 9A), and the disk D is fixed in a state in which the drive roller 20b has moved slightly downward due to rotation against the biasing force of the spring 35 of the support plate 27. It is sandwiched between the rollers 20a and transported to a predetermined position (B in the same figure). In this state, the disk D is placed on the switch 9 located at the rear end of the chassis 12.
The plunger arm 40 rotates back and the segment gear arm 38 returns due to the biasing force of the spring 39, and its rack portion 38a
is meshed with the small diameter tooth portion 36b of the support plate rotation gear 36.

Therefore, the support plate 27 resists the upward biasing force of the spring 35 due to the rotation transmitted from the drive roller gear 30 of the support plate rotation gear 36, and the shaft pin 28
The engaging piece 27b of the support plate 27 starts to rotate downward around the shaft support.
is engaged with the other end 43c of the connecting arm 43, so that the connecting arm 43 is rotated downward as the support plate 27 is rotated downward, and the connecting arm 1
This will cancel the push-up of 6. For this reason, the chucking arm 16 is moved by the biasing force of the spring 17 to align the chucking disk 18 attached to its tip with the center of the disk D, and at this time, the driving roller 20b continues to rotate. As the support plate 27 rotates downward, the movable guide roller 19b also moves downward.
is rotated downward integrally with the support plate 27 via the engagement piece 27a, and the disk D is moved downward.
is lowered in a horizontal state, and the chucking plate 18 comes into contact with the center thereof, and the chuck is chucked onto the spindle motor 13.

The support plate 27 reaches the position where this chucking operation is completed.
rotates downward until an appropriate gap is created between the engaging portion of the chucking arm 16 and the other end 43c of the connecting arm 43, and the drive roller 20b and movable guide roller 19b are separated from the lower surface side of the disk D. When the motor 3 is rotated downward, the loading completion switch 10 is operated by the support plate 27.
1 is stopped.

When loading is completed as described above,
The disk D is chucked onto the spindle motor 13 by the chucking plate 18 of the chucking arm 16, and the drive roller 20b and the movable guide roller 19b are held in a lowered state away from the lower surface of the disk D, and the disk D is optically picked up. 15 is performed.

Next, when the disk D is to be ejected from the chucking state, when the eject operation button is pressed, the motor 31 is reversely turned on and the reverse operation of the above-described feeding and chucking operation of the disk D is performed.

That is, when the motor 31 is turned on in the reverse direction, the drive roller 20b rotates in the reverse direction, and the support plate rotating gear 36 of the support plate 27 also rotates in the reverse direction, so that the small diameter toothed portion 36b
engages with the rack portion 38a of the segment gear arm 38 in a reverse rotation, so that the support plate 27 is rotated upward about the shaft support, and with this movement, the connecting arm 43 is pushed down by the engagement piece 27b of the support plate 27. is released and rotated upward by the biasing force of the spring 44, and accordingly, the chucking arm 16 is raised against the biasing force of the spring 17 of the shaft support, and the chucking plate 18 is moved upwardly by the biasing force of the spring 44.
separated from the top surface of the On the other hand, the drive roller 20b
The fixed roller 20a is also rotated in the opposite direction and is moved upward via the support plate 27 to push up the disk D.
As a result, they will be clamped again. Also, at this time, the movable guide roller 19b of the guide roller mechanism 19 is released from being pressed down by the support plate 27 of the arm 23, so that it is moved upward by the biasing force of the spring and comes into contact with the fixed guide roller 19a.

In this way, when the support plate 27 is raised and rotated to a predetermined position and the disk D is moved forward and separated from the switch 9 at the rear end of the chassis, the switch 9 is turned on and the plunger 41 is activated. The plunger arm 40 rotates to rotate the segment gear arm 38 in a direction away from the support plate 27 against the biasing force of the spring 39, so that the rack portion 38a of the segment gear arm 38 is connected to the small diameter tooth portion 36 of the support plate rotation gear 36.
Separate from b. Therefore, the support plate 27 can freely rotate, and both the support plates 27 and 27' are integrally rotated upwardly by the biasing force of the springs 35 and 35' via the connecting plate 27'', so that the driving roller 20b and the fixed roller 20a are rotated upwardly. As a result, the disk D is completely clamped, and the disk D is moved in the direction of the insertion port 2 through the guide rollers 19a and 19b by the reverse rotation of the drive roller 20b.

When the disk D is moved to a predetermined position, the detection switch 8 turns off the motor 31 and the movement of the disk D is stopped. In this state, when the disk D is pulled out from the insertion slot 2 and the opening/closing lid 5 is closed, the switch 7 is turned off and the plunger 41 becomes inactive, the plunger arm 40 is rotated back, and the segment gear arm 38 is moved by the spring 39. is rotated in the direction of the support plate 27 by the biasing force of
The rack portion 38a meshes with the small diameter tooth portion 36b of the support plate rotating gear 36 and returns to its original state.

In the above operation, when the support plate 27 is rotated upward by the engagement between the small diameter tooth portion 36b of the support plate rotation gear 36 and the rack portion 38a of the segment gear arm 38, the pin 42 of the support plate 27 The pin 42 slides in the groove 38b, and the pin 42 faces the guide groove 38c with the support plate 27 rotated upward to the top. By operating the plunger 41 in this state, the segment gear arm 38 is moved by the plunger arm 40.
The rack portion 38a is rotated in a direction away from the support plate 27 via the support plate 27, and the engagement between the rack portion 38a and the small diameter tooth portion 36b of the support plate rotation gear 36 is released.

In this example, the guide roller mechanism 19 is provided simply to maintain the posture of the disk D, so instead of this roller mechanism, other types of guides such as plate-shaped guides can perform the same function.

Further, the drive roller mechanism 20 of this example has a drive roller 2
0b is moved by the support plate 27, the fixed roller 20a is pivoted to the support plate 27 and moved, and the drive roller 20b
may be pivoted to the frame 11 and driven by a motor.

The disk player illustrated above is configured to be loaded with the disk D stored in the storage case.

This disk storage case 51 has a size that allows the disk D to be stored with approximately half of its circumference exposed, and its front half 51a is stepped and thinner than the rear half 51b, and when not in use, the thin front half is Part 51
A lid 52 is fitted to cover a to hide the disk D.

To load the disc D stored in the storage case 51 into the disc player, remove the lid 52 from the storage case 51, and insert the disc D into the insertion opening 2 of the player casing 1 with approximately half the circumference exposed. Then, the tip part pushes open the opening/closing lid 5,
The front half 51a of the storage case 51 is also inserted. When the front half 51a of the storage case 51 is inserted into the insertion slot 2, it is pressed from both sides due to its inner circumferential shape, and the upper and lower surfaces are bent.The upper and lower surfaces are separated from the disk D, and the disk D is The latching is released and it can be taken in and out freely, and it is held and transported by the above-mentioned transport device.

As described above, according to this example, the transport mechanism for the disk D is constituted by a drive roller having a small diameter in the center and gradually increasing in diameter toward both ends, and this drive roller is used to record signals of the inserted disk D. Since the disk D is configured to be conveyed in contact with the periphery of the surface, the signal recording surface of the disk D is prevented from being soiled or damaged, and since the contact area with the drive roller is extremely small, the disk D is conveyed smoothly with little resistance. .

Also, the meshing state between the rotation gear 36, which supports the support plate that supports the movable roller of the drive roller mechanism and the segment gear that controls the vertical movement of this support plate, and the rack portion of the segment gear arm. Since the structure is such that the disks D are engaged at the same time, the feeding and ejecting operations of the disk D can be carried out reliably at all times without causing the support plate to swing inadvertently due to a shock or the like.

Application Examples The present invention can be applied to various recording and reproducing devices for disk-shaped magnetic recording media, such as disk players installed in automobiles and the like, portable disk players for home use, and the like.

Effects of the Invention As described above, according to the present invention, the drive roller that pinches and conveys the disk-shaped recording medium is formed to have a small diameter at the center and gradually increase in diameter toward both ends. The insertion portion of the disk-shaped recording medium is formed as a gap that gradually narrows from the center toward both ends, and when a disk-shaped recording medium is inserted between this gap, only the circumferential edge of the disk forms a spiral shape as the drive roller rotates. The signal recording surface of the recording medium does not come into contact with the circumferential surface of the drive roller at all, so there is no risk of dust adhesion or damage, and the recording medium moves toward its center as the drive roller rotates. Disc transport equipment for disc players that is used in locations that are susceptible to vibrations, such as those mounted on automobiles, because it is transported in a biased state, so it can be transported reliably and smoothly to a predetermined position in a stable state. The effect is great when applied to.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of an example of a disk player to which the device of the present invention is applied, Fig. 2 is an enlarged longitudinal sectional side view of a portion of the same with a disk inserted, and Fig. 3 is a disk equipped with the device of the present invention. FIGS. 4A and 4B are a perspective view of an example of a player mechanism, and FIGS.
The figures are a side view of an example of the drive mechanism section, FIG. 6 is a sectional view taken along the line -- in FIG. 5, FIG. 7 is a sectional view of a portion of the fixed roller section, and FIG. 8 is a perspective view of the chucking section. 9 is a cross-sectional view for explaining the operation of the roller mechanism section, and FIG. 10 is a perspective view of an example of a storage case that stores a disk conveyed by the apparatus of the present invention. In the figure, 11 is a frame, 20 is a drive roller mechanism,
20a is a fixed roller, 20b is a driving roller, 27
is a support plate, 30 is a drive gear, 31 is a motor, 36
38 is a segment gear arm, 40 is a plunger arm, and 41 is a plunger.

Claims (1)

[Scope of Claims] 1. In a disc-shaped recording medium conveying device having a drive roller that pinches and transports an inserted disc-shaped recording medium, the drive roller has a diameter that is small in the center and gradually increases in diameter toward both ends. A disc-shaped recording medium conveying device characterized in that the drive roller is brought into contact with a peripheral edge of a signal recording surface of the disc-shaped recording medium.