JPH0437331Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Conventional technology D. Problems to be solved by the invention E. Means for solving the problems F. Effect _G. (Figure 8B) G Explanation of the _double speed mechanism (Figures 1A to 5) H Effects of the invention A Industrial application field This invention allows recording media such as optical disks to be placed horizontally inside the player body using a disk tray. The present invention relates to a disc player in which the disc is pulled in and then mounted on a turntable inside the player body.

B. Summary of the invention This invention is a disk player in which a recording medium, such as an optical disk, is drawn horizontally into the player body using a disk tray, and then the disk is mounted on a turntable inside the player body. The structure is extremely simple by using a double speed mechanism for horizontal movement of the disk tray, and by making it possible to vertically lower the disk tray without being restricted in any way by the double speed mechanism. However, by making it possible to almost completely pull out the disc tray from inside the player body, which has a short depth, and by eliminating rattling in the double speed mechanism, the disc tray can be driven quietly and with high precision. This is what I did.

C. Prior Art A known example of a disc player according to the applicant of this invention is, for example, Japanese Utility Model Application No. 59-149255.

This known example uses a speed-doubling mechanism consisting of a fixed rack, a rolling pinion, and a movable rack to horizontally move the disk tray by an amount twice as much as the amount of movement of the rolling pinion.

According to this known example, it is possible to pull out the disc tray almost completely from within the player main body, which has a short depth, and it is possible to easily attach and remove the disc onto the disc tray.

D Problems to be Solved by the Invention However, in this known example, in order to restrain the vertical descent of the disk tray, the disk tray itself, which has been horizontally retracted into the player body, is lowered vertically as it is. Can not do it.

Therefore, in order to utilize this known double speed mechanism, the disk tray is attached to a tray carrier exclusively for horizontal movement so that it can rise and fall freely, and the tray carrier is driven by the double speed mechanism. It is necessary to adopt a method in which the disk tray is pulled horizontally into the player body, and then the disk tray is lowered vertically relative to the tray carrier.

However, if such a method is adopted,
There is a defect that the structure becomes complicated and the number of parts and assembly man-hours increase.

This invention was devised to solve these problems, and uses a double speed mechanism to horizontally move the disc tray, while also allowing the disc tray itself to be moved horizontally into the player body. be able to descend vertically, and
This prevents rattling from occurring in the speed doubler mechanism.

E. Means for Solving Problems This invention consists of a left and right fixed rack placed inside the player body, a pair of left and right trailer racks provided on the disc tray, and a pair of left and right trace sliders that hold the disc tray. A pair of left and right rolling pinions, which are rotatably mounted and engaged between both racks, constitute a speed-doubling mechanism, and a pair of left and right rack plates driven by a motor move the trace slider to the horizontal guide of the guide plate. By driving the disk tray in the horizontal direction along the horizontal direction, the disk tray is moved horizontally by an amount twice as much as the horizontal movement amount of the trace slider. At that time, by arranging the fixed rack and the trailer rack horizontally and facing each other, and configuring the rolling pinion placed between them as a vertical and wide pinion, the trace slider is moved by the rack plate to the guide plate. When driven horizontally along the vertical guide, the rolling pinion is allowed to slide vertically relative to the fixed rack.

Moreover, one of the pair of left and right fixing racks is fixed at a fixed position value, and the other fixing rack is biased by a spring in a direction approaching one of the fixing racks. in,
A pair of left and right rolling pinions and a pair of left and right trailer racks are elastically clamped together.

F Effect According to this invention, a double speed mechanism is used to move the disk tray horizontally, but when the disk tray is moved vertically, the rolling pinion of the double speed mechanism slides vertically with respect to the fixed rack. Therefore, the double speed mechanism does not restrict the vertical descent of the disk tray in any way. Therefore, the disk tray itself, which has been horizontally retracted into the player main body, can be lowered vertically without being restricted in any way by the speed-doubling mechanism.

Furthermore, since the pair of left and right rolling pinions and the pair of left and right trailer racks are elastically clamped between the pair of left and right fixed racks, there is no wobbling or the like in the speed-doubling mechanism. That is,
When the rack and pinion are horizontally opposed to each other, gear backlash and rattling occur due to dimensional tolerances between the rack and pinion, expansion due to temperature changes, and the like. If these are large, noises such as gear noise may be generated when the disk tray is driven, and variations may occur in the horizontal retraction position of the disk tray into the player body, causing the disk tray to drop vertically into the turntable. The disks may be installed incorrectly, and errors in disk installation are likely to occur.

However, according to the double speed mechanism of the present invention, the rack and pinion, which are horizontally opposed to each other, are elastically pressed against each other, so no gear backlash or rattling occurs between the rack and pinion. .

G. Example An example of this invention will be described below with reference to the drawings.

_G1 First, an overview of the entire disk player will be explained with reference to FIGS. 6A to 8B.

A turntable 2 and an optical head 3 for recording and reproduction are provided inside the player body 1.
The turntable 2 is directly rotationally driven by a motor 4 attached to its lower part, and the optical head 3 is guided by a pair of guide shafts 5 and the like and is horizontally reciprocated along the radial direction of the disk, which will be described later. It is configured to

The disk tray 7 is inserted through a horizontally long front opening 8 provided in the front wall (the left wall in FIG. 4A) 1a of the player main body 1, and is inserted into the horizontal direction of the player main body 1 by arrows a and b. It is configured so that it can be moved in and out in any direction. Top surface 7a of disk tray 7
A circular recess 10 for horizontally positioning and placing a disk 9 such as an optical disk as a recording medium.
is provided. The disk tray 7 is provided with an opening 11 that is horizontally elongated from the central portion of the circular recess 10 to the rear end (the right end in FIG. 4A) and vertically passes through the disk tray 7.

Inside the player body 1, there are a pair of left and right trace sliders 13a, 13b, a pair of left and right guide plates 14a, 14b, and a pair of left and right rack plates 15a, 1.
5b, and a pair of left and right drive pinions 16a, 16
b, a motor 17 and a pair of left and right double speed mechanisms 18a,
18b etc. are provided. In addition, the double speed mechanism 18
a, 18b are a pair of left and right fixing racks 19a, 1
9b, a pair of left and right trailer racks 20a, 20b integrally provided on the disk tray 7, and both racks 19a, 19b, and 20 rotatably attached to a pair of left and right trace sliders 13a, 13b.
It is constituted by a pair of left and right rolling pinions 21a and 21b that are engaged with pinions a and 20b. Further, both guide plates 14a and 14b are connected to the player body 1.
These guide plates 14a and 14b have rail-shaped horizontal guides 2.
3, and a pair of front and rear groove-shaped vertical guides 24 are provided. Further, both the rack plates 15a and 15b are attached to both the guide plates 14a and 14b in the front and back direction (arrow a,
b direction). Also,
Both drive pinions 16a, 16b are connected to both guide plates 14.
The drive shaft 25 is fixed to both ends of a drive shaft 25 installed horizontally between the rack plates 15a and 14b, and is engaged with a rack 26 that is integrally provided on the lower surface of both rack plates 15a and 15b. Further, the drive shaft 25 is interlocked with the motor 17 via a gear train 27. Further, both trace sliders 13a and 13b are placed horizontally on both horizontal guides 23 of both guide plates 14 by a total of four horizontal guide pins 28, a pair of front and rear provided on both left and right sides thereof, The tips of these guide pins 28 are engaged with a total of four groove-shaped inclined guides 29, a pair of front and rear guides provided at both front and rear ends of both rack plates 15a, 15b. Further, the disk tray 7 is placed horizontally on both trace sliders 13a and 13b, and these have a pair of left and right guide grooves 30 and a total of four guide pins 31, one pair each on the left and right sides.
are engaged through. As a result, both trace sliders 13a and 13b are configured to be able to move in and out horizontally from the front opening 8 in the directions of arrows a and b, and the disk tray 7 is moved between both trace sliders 13a and 13b.
It is held so that it can be moved in and out horizontally in the directions of arrows a and b.

According to the disk player configured as described above, first, before starting loading of the disk 9, the disk tray 7 is loaded as shown in FIG. 6A.
is almost completely pulled out of the player body 1 in the direction of arrow b. Further, as shown in FIGS. 6A and 7A, both trace sliders 13a and 13b are also pulled out of the player main body 1 by an amount that is approximately half the amount that the disc tray 7 is pulled out.

Next, the loading operation of the disk 9 is started after the disk 9 is placed horizontally in the circular recess 10 of the disk tray 7.

That is, both drive pinions 16a and 16b are moved by the motor 17 via the drive shaft 25 in the direction indicated by the arrow c in FIG. 7A.
When driven in the direction, both rack plates 15a, 15b
is horizontally driven in the direction of the arrow a, and the four guide pins 28 are moved between both guide plates 1 by the four inclined guides 29.
It is horizontally driven in the direction of arrow a on the horizontal guides 23 of 4a and 14b. Then, both trace sliders 13
a, 13b are horizontally driven in the direction of arrow a, and both rolling pinions 21a, 21b are connected to both fixing racks 19a, 13b.
While rolling on the trailer 19b in the direction of arrow a, both trailer racks 20a and 20b are horizontally driven in the direction of arrow a by these rolling pinions 21a and 21b. As a result, the disc tray 7 is horizontally moved in the direction of arrow a by a horizontal movement amount twice the horizontal movement amount of both trace sliders 13a and 13b, and this disk tray 7 moves towards the player body 1 as shown in FIG. 6B.
horizontally drawn in.

As shown in FIG. 8A, when the disk 9 is pulled in horizontally to a position directly above the turntable 2, both guide plates 14
The pair of guide pins 28 come into contact with the stoppers 32a provided at the ends of the trace sliders 13a and 14b in the direction of the arrow a, and the horizontal retracting operation of both the trace sliders 13a and 13b and the disk tray 7 is completed.

On the other hand, both rack plates 15a and 15b continue to be horizontally driven (overstroked) in the direction of arrow a by both drive pinions 16a and 16b, and as shown in FIG. The plates 14a and 14b are horizontally driven in the direction of arrow d along the vertical guides 24. Then, as shown in FIG. 8B, the disk tray 7 is vertically lowered together with both trace sliders 13a and 13b in the direction of arrow d, and the disk 9 is mounted horizontally on the turntable 2. At this time, the disk 9 is engaged with the outer periphery of the center guide 2a of the turntable 2 through the center hole 9a to be centered, and is also chucked to the turntable 2 by a chucking means (not shown). Ru.

With the above, the disk loading operation is completed, and the disk 9 is horizontally rotationally driven by the motor 4 via the turntable 2.
The optical head 3 performs recording and reproduction on the disk 9.

The unloading operation of disk 9 is as follows:
This is the reverse operation of the loading operation.

That is, when the driving pinions 16a and 16b are driven to reverse rotation in the direction of the arrow e in FIG. 7C due to the reverse rotation of the motor 17, the disk tray 7 is moved by the trace sliders 13a and 13b as shown in FIG. 8A. is lifted vertically in the direction of the arrow f, the disk 9 is lifted from the turntable 2 and placed horizontally in the circular recess 10 of the disk tray 7, and then the disk tray 7 is placed on both trace sliders 1.
The disk tray 7 is horizontally moved in the direction of the arrow b by a horizontal movement amount twice that of the horizontal movement amounts of the disk trays 3a and 13b, and the disk tray 7 is almost completely pulled out of the player main body 1, as shown in FIG. 6A. In addition, at this time, as shown in FIG. 7A, the arrow b of both guide plates 14a, 14b
A stopper 32b provided at the end of the direction
The pair of guide pins 28 are brought into contact with the two trace sliders 13a, 13b, and the horizontal drawing operation of the disk tray 7 is completed.

By the way, as shown in FIG. 6A, when the disc tray 7 is almost completely pulled out of the player main body 1, the circular recess 10 is completely exposed outside the player main body 1, so that the disc 9 relative to the disc tray 7 The attachment/detachment operation can be performed very easily from directly above the circular recess 10.

G ₂ Next, details of the speed-doubling mechanisms 18a and 18b will be explained with reference to FIGS. 1A to 5.

First, both fixed racks 19a, 19b and both trailer racks 20a, 20b are horizontally opposed to each other. Both rolling pinions 21a, 21b are connected to these racks 19a, 19b and 20a, 20.
These two racks 1 are placed vertically between
9a, 19b and 20a, 20b, and is configured as a wide pinion with a wide width at the top and bottom. Note that both rolling pinions 21a, 2
1b is rotatably attached to a pinion shaft 34 that is attached perpendicularly to the lower part of both trace sliders 13a and 13b. Also, both rack plates 15a, 1
5b is engaged with a horizontal guide groove 35 provided in both guide plates 14a, 14b via a pair of front and rear guide pins 36, and is configured to be movable in the horizontal direction. In addition, the disk tray 7 and both trace sliders 13a and 13b are connected to a guide groove 30 and a guide pin 31 that engage in a vertical direction, and another guide groove 37 provided at right angles to these and a pair of front and rear guides. By engaging with the pin 38 in the horizontal direction, they are integrally engaged with each other in the left-right direction (left-right direction in FIG. 1A) and the up-down direction (up-down direction in FIG. 1A), and the front-back direction (in FIG. 6A) arrow a, b
It is configured so that it can be moved relatively only in the direction (direction). Further, the disk tray 7 is configured to be able to move smoothly in the front and back direction on a total of four steel balls 40, a pair of front and rear, which are held in recesses 39 on both trace sliders 13a and 13b.

Double speed mechanism 18a, 18b configured as above
According to the above, both trace sliders 1
When the disk tray 7 is vertically moved together with the fixed racks 19a and 13b, as shown in FIGS. It can slide smoothly in the d and f directions.

Therefore, since the double speed mechanisms 18a and 18b do not restrict the vertical descent of the disc tray 7, the disc tray 7 that is horizontally retracted into the player body 1
It can be lowered vertically.

Moreover, in these speed-doubling mechanisms 18a, 18b, one of the left and right fixing racks 19a, 19b (the left side in FIG. 1A) is integrally provided inside the guide plate 14a, so that it can be held at a fixed position. The other fixing rack 19b (on the right side in FIG. 1A) is configured to be movable in the left-right direction (in the direction of arrows g and h), which is the distance direction with respect to the one fixing rack 19a.

That is, as shown in FIGS. 2A to 5, the other fixing rack 19b has a plurality of support arms 42 integrally provided at its lower part and a plurality of brackets 43 provided inside the other guide plate 14b as fulcrum points horizontally. axis 44
It is mounted so as to be swingable in the directions of arrows g and h, and is biased in the direction of arrow g by a plurality of springs 45. Note that the plurality of springs 45 are inserted into the outer periphery of a plurality of pins 46 that are integrally provided on the outside of the other fixing rack 19b, and
It is inserted into and held in a plurality of recesses 47 provided inside b.

Double speed mechanism 18a, 18b configured as above
According to , the other fixing rack 19b, which is biased in the direction of arrow g by a plurality of springs 45,
The pair of left and right rolling pinions 21a, 21b and the pair of left and right trailer racks 20a, 20b are sequentially pressed toward one fixed rack 19a. Therefore, the pair of left and right rolling pinions 21a, 21b and the pair of left and right trailer racks 20a, 20b are elastically clamped between the pair of left and right fixed racks 19a, 19b, and these Gear backlash and backlash between the rack and pinion will no longer occur. As a result, when the disk tray 7 is horizontally driven in the directions of arrows a and b, no noise such as gear noise is generated, and the disk tray 7 can always be driven quietly. Furthermore, since there is no wobbling, the center of the disk 9 can be positioned directly above the center of the turntable 2 when the disk tray 7 is pulled in horizontally in the player direction 1 as shown in FIG. 8A. Since the horizontal retraction position of the disk tray 7 can be determined with high precision, when the disk tray 7 is vertically lowered in the direction of arrow d as shown in FIG.
The disk 9 can always be mounted accurately so that it is accurately engaged with the outer periphery of the center guide 2a.
Therefore, errors in mounting the disk 9 do not occur.

In addition, in this double speed mechanism 18a, 18b,
One fixed rack 19a and one rolling pinion 2
1a, one trace slider 13a can be applied to the inside of one guide plate 14a from the direction of arrow g using the pressing force of the plurality of springs 45 in the direction of arrow g. If the trace slider 13a is slidably guided in the directions of arrows a and b by the guide plate 14a, the left and right directions of the disk tray 7 (arrows g and
The positioning in the h direction) is also accurate, and the disk 9 can be mounted on the turntable 2 even more accurately.

Although the embodiments of this invention have been described above, this invention is not limited to the embodiments, and various effective changes can be made based on the technical idea of this invention.

Furthermore, this invention can be applied to disc players for various uses using discs of various recording and reproducing methods.

H. Effects of the invention As stated above, this invention uses a double speed mechanism to horizontally move the disc tray, so the disc tray can be pulled out almost completely from within the player body, which has a short depth, and the disc tray can be moved horizontally. The disk can be easily attached and detached from the top.

However, the disk tray itself, which has been pulled horizontally into the player main body, can be lowered vertically without being restrained by the speed-doubling mechanism, so horizontal movement driven by the speed-doubling mechanism is possible. There is no need to adopt a complicated structure such as using a dedicated tray carrier and attaching the disk tray to the tray carrier so that it can be raised and lowered.The structure is extremely simple, and the number of parts and assembly man-hours are greatly reduced. be able to.

Moreover, the present invention allows for
The pair of left and right rolling pinions and the pair of left and right trailer racks are elastically clamped by springs, so that no gear bumps or rattles occur in the speed-doubling mechanism, so when driving the disk tray, No noise such as gear noise is generated, and the disk tray can be driven quietly. In addition, since there is no wobbling, the horizontal retraction position of the disc tray into the player body can be positioned with high precision, so the disc can always be accurately attached to the turntable by lowering the disc tray vertically. There is no chance of installation errors.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and FIGS. 1A and 1B are cross-sectional views of the main parts explaining the speed-doubling mechanism, and FIGS. 2A and 2B are enlarged cross-sections of the same main parts. Figure 3 is a - arrow view of Figure 2A, Figure 4 is an exploded perspective view of the main parts of the same as the above, Figure 5 is a perspective view of the main parts of the same as the above, and Figures 6A and 6B are the disk tray. 7A to 7C are side views of the entire same as above,
FIGS. 8A and 8B are central vertical cross-sectional views of the entire same as above. In the symbols used in the drawings, 1...player body, 2...turntable, 7...disc tray, 9...disc, 13a...trace slider, 13b...trace slider, 14a...
...Guide plate, 14b...Guide plate, 15a...Rack plate, 15b...Rack plate, 16a...Drive pinion, 16b...Drive pinion, 17...Motor, 18a...Double speed mechanism, 18b...Double speed mechanism ,
19a...Fixed rack, 19b...Fixed rack,
20a... Trailer rack, 20b... Trailer rack, 21a... Rolling pinion, 21b... Rolling pinion, 23... Horizontal guide, 24... Vertical guide, 42... Support arm, 44... Fulcrum shaft, 45
...It's a spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A player body with a turntable inside, a pair of left and right trace sliders configured to be able to move in and out of the player body horizontally, and a disk placed horizontally on the top surface. A disc tray is held horizontally in and out of the trace slider, a pair of left and right guide plates each having a horizontal guide and a vertical guide for the trace slider are provided inside the player body, and the disc tray is horizontally movable inside the player body. A pair of left and right rack plates are provided to drive the trace slider horizontally and vertically along the guide plate, a pair of left and right drive pinions are driven by a motor to drive the rack plates horizontally, and a pair of drive pinions are mounted horizontally on the disk tray. A pair of left and right trailer racks installed horizontally; a pair of left and right fixing racks installed horizontally on the player body and facing the trailer; and a pair of left and right fixing racks installed horizontally on the player body and rotatably attached to the trace slider between the trailer rack and the fixing rack. A pair of wide rolling pinions on the left and right are arranged perpendicularly to the rack and are engaged with both racks, and the rack plate drives the trace slider in the horizontal direction along the horizontal guide of the guide plate. When doing this, the rolling pinion is rolled on the fixed rack and the rolling pinion drives the trailer rack, so that the disk tray is moved horizontally by a horizontal movement amount twice that of the trace slider. When the trace slider is driven by the rack plate in the vertical direction along the vertical guide of the guide plate, the rolling pinion is slid vertically with respect to the fixed rack, so that it is integrated with the trace slider. The disk tray is moved vertically to attach and detach the disk from and to the turntable, and the pair of left and right fixing racks are arranged on the outside, and the pair of left and right rolling pinions and the pair of left and right fixing racks are arranged on the outside. of the pair of left and right fixed racks, one of the fixed racks is fixed at a fixed position value, and the other fixed rack is configured to be movable in the direction of distance from and near the one fixed rack, and the other fixed rack is A disk player in which the disk is biased by a spring in a direction toward one of the fixing racks.