JPH0896477A - Loading unit raising/lowering device for disk player - Google Patents

Abstract

PURPOSE: To miniaturize a device by raising/lowering a loading unit with a rotary cam mechanism. CONSTITUTION: When left and right cam plates 87L and 87R having guide holes for guiding the left and right guide shafts 300L, 300R, 301L and 301R of a loading magazine 4 for loading/unloading a disk in a magazine are rotated via a rotary cam mechanism, the shafts 300L, 300R, 301L and 301R are guided and raising/lowering of a machine 4 is controlled. Because of this simple structure, the loading unit raising/lowering device of a disk player is miniaturized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading unit elevating device for a disc player capable of accommodating a plurality of mini discs and successively selecting any of the mini discs contained therein for continuous performance. .

[0002]

2. Description of the Related Art Conventionally, as a disc player capable of accommodating a plurality of discs and sequentially selecting any of the accommodated discs for continuous performance, JP-A-61-
As disclosed in Japanese Unexamined Patent Publication No. 230671, there is one in which a loading unit is moved up and down by sliding a plate provided with a staircase cam.

[0003]

However, in the above-mentioned conventional disc player, since the plate requires as many staircase cams as the number of discs, when the number of discs is large, the plate becomes large, Also,
There has been a problem that the sliding stroke of this plate also becomes long and the device becomes large.

The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to move a loading unit up and down by a rotating rotary cam mechanism to downsize the apparatus. It is an object of the present invention to provide a loading unit elevating device for a disc player capable of performing the above.

[0005]

In order to achieve the above object, the present invention vertically guides guide shafts formed on the left and right side surfaces of a case and provided on the left and right of a chassis unit of a loading unit. A guide hole and a rotating cam mechanism for moving the guide shaft in the vertical direction by rotation are provided.

The rotary cam mechanism is provided on the inner surface of the plate body with one and the other groove-shaped cam portions which are line-symmetrical with respect to a straight line E in the radial direction passing through the center of rotation of the plate body and both groove-shaped. A guide cam is formed at a portion where the cam portions intersect with each other, and includes a connecting portion for connecting the two groove-shaped cam portions, and corresponds to a plurality of stages of disc storage areas in the magazine, and forms a guide cam into which the guide shaft is inserted. The left and right outer cam plates and the plate body are line-symmetric with respect to a radial straight line C passing through the center of rotation a of the plate cam, and one and the other groove-shaped cam portions of the guide cams of the outer cam plate intersect each other. The left and right outer cam plates and the left and right outer cam plates that connect the one and the other grooved cam portions to each other and connect the guide shafts with each other. Over preparative it may be constituted by a synchronous rotation drive mechanism for rotating synchronously.

[0007]

With this structure, by rotating the rotary cam mechanism, the guide shafts provided on the left and right of the chassis of the loading unit are moved up and down together with the guide holes of the case for guiding these guide shafts in the vertical direction. The loading unit up and down.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a disc player equipped with a loading unit lifting device according to the present invention with a part thereof omitted, FIG. 2 is an exploded perspective view of the disc player, and FIG. 3 is an exploded perspective view of a magazine with a part omitted. In the drawings, the M-1 direction is front, the U-1 direction is rear, the L-1 direction is left, and the R-1 direction is right. In addition, in FIG.
Illustration of the trace topper 24 is omitted.

The disc player is composed of a magazine 1, a base unit 2, an elevating unit 3, and a loading unit 4. The magazine 1 is
As shown in FIGS. 3 to 9, a box-shaped case 5 is provided, and the case 5 has a rear surface and a lower surface opened,
It has a front surface portion 5a, left and right surface portions 5b and 5c, and an upper surface portion 5e, and a lid 5f is fixed to the lower surface by screwing. Further, the left surface portion 5b is formed with a recessed portion 6 extending in the vertical direction.

On the inner surfaces of the left and right surface portions 5b and 5c, a plurality of guide grooves 6L and 6R along the front-rear direction are formed at predetermined intervals in the vertical direction (nine), and the recessed portion 6 is formed. The same number of slits 7 as the guide grooves 6L are formed. In addition, a concave portion 8 is formed on the inner surface of the front surface portion 5a so as to be closer to the left side and extends in the vertical direction.
On the inner surface of a, the contact portions 9L and 9R are provided on the left and right in the vertical direction.
Is formed, and the guide groove 6L, 6R is formed in the contact portion 9L.
The locking groove 10 is formed at the same level as. A guide groove 11 is formed along the front-rear direction below the outer surface of the left and right surface portions 5b and 5c of the case 5. The upper surface portion 5
The stopper receiving portion 11a is located on the left side on the inner surface of e.
Is formed.

On the left side of the front surface portion 5a, a disc holder spring 12 for locking a disc (mini disc) MD is provided.
A plurality of (10) are attached at a predetermined interval in the vertical direction. Engaging projections 12a are formed on these disk holder springs 12.

On the outer surface (lower surface) of the lid 5f, left and right guide ridges 13L and 13R along the front-rear direction and guide grooves 14 along the front-rear direction are formed, and the lid 5f is formed.
A notch 15 is formed at the center of the rear edge of the rear edge, an engaging recess 16 is provided at the center of the notch 15, and the notch 1
Locking groove portions 31 are formed on the outer surface (lower surface) on the left side of 5, respectively. The locking groove portions 31 have a cam portion 31a and a locking portion 31b. A push button hole 30 is formed on the left side of the lid 5f.

A plurality of (9) trays 17 are inserted into the case 5 so that they can be taken in and out, and these trays 17 define a plurality of disk storage areas F for storing the disks MD. . That is, the tray 17
As shown in FIG. 10, the guide portions 18 are provided on the left and right edges.
L and 18R are provided, and a hook portion 17a and a locking portion 17b are formed on the left side of the front edge portion of the tray 17.
A long hole 20 is formed on the left side of the tray 17 in the front-rear direction, and the rear portion of the long hole 20 has a large-diameter hole portion 19 larger than the front portion. A stopper piece 21 is formed in the center of the tray 17 toward the front, and a protrusion 22 is formed on the upper end of the stopper piece 21. A pushing portion 23 is formed on the left side of the tray 17.

The tray 17 constructed as described above is inserted into the case 5 by slidably inserting the left and right guide portions 18L and 18R into the guide grooves 6L and 6R. The hook portion 17a of the tray 17 is inserted into the concave portion 8, the locking portion 17b is locked in the locking groove 10 so as to be disengageable, and the pushing portion 23 of the tray 17 penetrates the slit 7. In addition, the pushing portion 23 is exposed in the concave portion 6.

When a plurality of trays 17 are inserted in the case 5 as described above, the elongated holes 20 of each tray 17 are aligned vertically. Then, a trace topper 24 penetrates through these elongated holes 20. That is, in the trace topper 24, as shown in FIG. 9, a rod-shaped stopper body 25 is formed with a plurality of alternating large diameter portions 25a and small diameter portions 25b, and a spring seat portion 26 is formed in the lower portion of the stopper body 25. The lower end portion of the stopper body 25 is a push button portion 27, and a movable spring seat body 28 is movably provided above the spring seat portion 26 of the stopper body 25. An elastic spring 29 is provided between the spring seat portion 26 and the spring seat portion 26.

Then, the trace topper 24 is inserted into the large-diameter hole portion 19 of the elongated hole 18 which is vertically aligned, and the upper end portion of the stopper body 25 is inserted into the stopper receiving portion 11a. The seat 28 is in contact with the lower surface of the lowermost tray 17, and when the lid 5f is attached to the lower surface of the case 5, the spring seat portion 26 is in contact with the lid 5f and the push button portion 27 is provided. Is exposed from the push button hole 30 provided in the lid 5f.

The base unit 2 has a base plate 7
2 and a magazine base 33, and the magazine base 33 is fixed to the front part of the base plate 72,
A front gate type top plate 73 is fixed to the magazine base 33. Two columns 34 and 35 connected to the magazine base 33 and the upper portion 73a of the top plate 73 are arranged on the front surface of the base unit 2, and the columns 34 and 35 connect the inside of the top plate 73. Are the magazine openings a, c, b in the left and right and in the center
Is defined. Further, flange-shaped guides 36 and 37 are formed on the lower portions of the columns 34 and 35.

The magazine base 33 is provided with guides 38, 39, 40 and 41 formed by cut and raised pieces positioned behind the columns 34 and 35, and the left side surface portion 73L of the top plate 73 is provided. The space between the guide 38 and the guide 38 is the left magazine accommodating portion A, the space between the guide 39 and the guide 40 is the central magazine accommodating portion B, the guide 41 and the top plate. The space between the right side surface 73R of 73 is the right magazine housing C, the magazine housing a is in the left magazine housing A, the magazine housing b is in the center magazine housing B, and the magazine housing is The mouths c respectively face the right magazine accommodating portion C.

A magazine guide mechanism 42 is provided on the bottom surfaces of the magazine accommodating portions A, C and B (upper surface of the magazine base 33) which constitute the magazine holder 500 at the left and right sides.
A magazine lock mechanism 43, a lock release mechanism 44, and a magazine ejection mechanism 45 are provided, respectively.

The magazine guide mechanism 42 of the left magazine accommodating section A is provided with a plurality of guide pins 46 provided at a predetermined distance in the front-rear direction at the center of the bottom surface of the magazine accommodating section A toward the right. Guide 36 at the bottom of the column 34
And the guide 38 and the left side surface portion 73L of the top plate 73. The magazine guide mechanism 42 of the central magazine accommodating section B is provided with a plurality of guide pins 46 provided at a predetermined distance in the front-rear direction on the right side of the center of the bottom surface of the magazine accommodating section B. It is composed of guides 36 and 37 and the guides 39 and 40.

Further, the magazine guide mechanism 42 of the right magazine accommodating section C is provided with a plurality of guide pins 46 provided at a predetermined distance in the front-rear direction at the center of the bottom surface of the magazine accommodating section C toward the right. A guide 37 at the bottom of the column 35,
The guide 41 and the right side surface portion 73 of the top plate 73
It is composed of R and. The upper and lower portions 73a of the top plate 73, which are the ceilings of the left and right and central magazine accommodating portions A, C, and B, have front and rear magazine pressing rollers 4
An upper pressing mechanism 74, in which 7, 48 are rotatably held by a leaf spring 49, is provided.

The magazine lock mechanism 43 is provided in each of the magazine accommodating portions A, C and B at the left and right and in the center. As shown in FIG. 12, the magazine lock mechanism 43 is provided with a lock plate 50 that moves in the left-right direction. The right part of the lock plate 50 has a long hole 52 formed in the right part in the left-right direction, and a magazine 52. A pin member 54 provided on the base 33 is slidably inserted and held. A locking pin member 56 is attached to the left portion of the lock plate 50, and the locking pin member 56 is attached.
Penetrates through a long hole 57 formed in the left side of the rear portion of the magazine base 33 in the left-right direction and protrudes above the magazine base 33, that is, into the magazine accommodating portions A, B, and C. And, the lock plate 50 is the spring 7
It is urged to the right by 5. Front and rear cam hole portions 61C and 61 are formed in the lock plate 50 (see FIG. 13).

The lock releasing mechanism 44 is provided in each of the magazine accommodating portions A, C and B on the left and right sides and the center. The left and center lock releasing mechanisms 44A and 44B are provided with a trigger plate 58 rotatably supported at the center of the magazine base 33 by pin members 77A and 77B.
Equipped with A and 58B, this trigger plate 58
A, 58B rear end interference portion 58Aa, interference portion 58Ba
21 are slits 59A, 59B formed in the rear edge of the magazine base 33 along the left-right direction as shown in FIG.
Through which the cams 60A, 60B are provided on the trigger plates 58A, 58B at the rear by pin members 77A, 77B.
The cams 60A and 60B are inserted into the rear cam hole portion 61 formed on the left side of the lock plate 50. Further, the trigger plates 58A, 58B have their interference portions 58Aa, 5B by the springs 76A, 76B hooked on the spring locking portions 58Ab, 58Bb at their front ends.
8Ba is biased to be located on the rear side of the device.

The right lock releasing mechanism 44C has the same structure as the left and center lock releasing mechanisms 44A and 44B, but the interference portion 58 at the rear end portion of the trigger plate 58C.
Ca penetrates the slit 59C formed in the rear edge of the magazine base 33 along the left-right direction and projects rearward, and the trigger plate 58C is provided with a cam 60C positioned at the front by a pin member 77C. The cam 60C is inserted into the front cam hole 61C formed on the left side of the lock plate 50. The trigger plate 58C has a spring locking portion 58 at the front end thereof.
It is urged forward by a spring 76C hooked on Cb.

As described above, in the left and center unlocking mechanisms 44A, 44B, the trigger plates 58A, 58 are included.
B cams 60A and 60B are inserted into the rear cam hole portion 61 of the lock plate 50, and in the right lock release mechanism 44C, the cam 60C of the trigger plate 58C is
Since it is inserted into the front cam hole 61C of the lock plate 50, when the magazine 1 is unlocked, the trigger plates 58A and 58B are tilted to the left as shown by the phantom line in FIG. 12, and the trigger plate 58C is shown in FIG. 12 is inclined to the right as shown by a virtual line.

Further, as shown in FIG. 21, among the slits 59A, 59B and 59C formed in the rear edge of the magazine base 33 along the left-right direction, the central and right slits 59 are provided.
B and 59C are at the same level, and the left slit 59A is at a higher horizontal position than the central slit 59B. This is because the first and second actuating pieces 115, 1 of the loading unit 4 that interfere with the interference portions 58Aa, 58Ba, 58Ca.
This is because 16 are different.

Further, the magazine ejection mechanism 45 is provided with front and rear elongated holes 6 formed in the magazine base 33 along the front and rear direction.
2, 63 are provided with a rack member 66 held by sliding holding pins 64, 65, and the rack member 66 is always biased forward by a spring 67. The rack member 66 engages with the rack 66a of a gear 69 on the rotation side of a damper 68 fixed to the back surface of the magazine base 33.

The elevating unit 3 slides left and right on the base plate 72 to select one magazine 1 in the magazine accommodating portions A, B and C, and also to vertically move the loading unit 4 therein. The target disc MD is selected. That is, the elevating unit 3 includes a slide mechanism 71 that moves the loading unit 4 in the left-right direction, and an elevating mechanism 84 that moves the loading unit 4 in the up-down direction.

As shown in FIG. 22, the slide mechanism 71 has a slide base 53 and a slide drive mechanism 71a for moving the slide base 53 to the left and right. Moving pin 5
3a, 53b, 53c are inserted into the left and right slide holes 74a, 74b, 75 of the base plate 72 along the left-right direction.

The slide drive mechanism 71a includes a rack member 76 fixed to the upper surface of the base plate 72 along the left-right direction, and a traveling motor 78 fixed to a mounting portion 77 on the lower front side of the slide base 53. , A gear mechanism 79 attached to the front side of the slide base 53 and rotated by the drive of the traveling motor 78. The gear mechanism 79 includes a worm 80 fixed to an output shaft 78a of the traveling motor 78 and a worm 80. , This warm 8
Worm gear 81 meshing with 0 and this worm gear 81
And a rack gear 83 linked to each other via a gear train 82. The rack gear 83 meshes with the rack 76a of the rack member 76.

Further, the slide base 53 has an optical sensor 310 for position detection and a switch 311 for position detection.
Are attached respectively. This optical sensor 310 is
As shown in FIG. 26, a slit 72 a is formed in the base plate 72 by moving together with the elevating unit 3.
27, and the switch 311 detects the cam 312 formed on the rack member 76 as shown in FIG. 27 and sets the initial position.

The slide base 53 is provided with an elevating mechanism 84 for vertically moving the loading unit 4. The elevating mechanism 84 includes a case 70 as shown in FIGS. 19 and 20, and the case 70 has a box shape with an open front surface. Then, guide holes 84L and 84R are formed along the up-down direction in the central portions of the left and right side surfaces 70L and 70R of the case 70. The case 70 is provided on the left and right case mounting portions 53 of the slide base 53.
It is attached to d.

The elevating mechanism 84 includes the case 7
The outer cam plates 86L, 87L, 86R, 87R and the outer cam plates 87L, 87R are rotatably attached to the support shaft 85 at the center of the left and right side surfaces 70L, 70R of 0 for synchronous rotation. Synchronous rotation drive mechanism 1
And the rotary cam mechanism 600. As shown in FIG. 31, a hole-shaped cam 88 is formed on the left and right inner cam plates 86L, 86L, and this hole-shaped cam 88 is provided with respect to a straight line C in the radial direction passing through the center of rotation (support shaft 85). It is axisymmetric and has a straight cam portion 89, a curved cam portion 90, a constricted cam portion 91, and a bulging cam portion 92 formed from the outside to the inside.

In addition, a spring piece portion 93 extending in the counterclockwise direction from a position 50 ° in the clockwise direction with respect to the straight line C in FIG. 31 is cut and raised in the peripheral portion of the left inner cam plate 86L. There is a projection 95 protruding outward at the tip of the spring piece 93. In addition, the spring piece portion 9 on the peripheral portion of the inner cam plates 86L and 86R.
A portion located on the side opposite to 3 is a cutout portion 97, and a pair of meshing teeth portions 98 are formed in the cutout portion 97 at a predetermined interval.

The outer cam plates 87L and 87R are
As shown in FIGS. 32 and 33, a disk-shaped plate body 87
a, and the peripheral portion of the plate body 87a has a gear 100
The inner surface of the plate body 87a is provided with a guide cam 101 which is axisymmetric with respect to a straight line e in the radial direction passing through the center of rotation of the plate body 87a. This guide cam 101
Is one groove-shaped cam portion 102 and the other groove-shaped cam portion 10
32, and when the plate main body 87a is set to the position of the straight line E at 0 degree in FIG. 32, one groove-shaped cam portion 102 reaches approximately 90 degrees in the counterclockwise direction from the straight line E, and the other side. The grooved cam portion 103 of the straight cam extends approximately 90 degrees in the clockwise direction.
02 crosses 0 degrees above. A connecting portion 99 is formed in the center of the plate body 87a, which is an elliptical recess for connecting the grooved cam portions 102 and 103. Further, as shown in FIG. 32, the recesses 104 and 10 are formed in the peripheral portion of the plate body 87a at positions of 58 degrees in the clockwise direction and the counterclockwise direction from the 0 degree position.
5 is formed.

As shown in FIG. 38, the guide cam 101 corresponds to a disc storage area F of 10 stages in the magazine 1. A chassis unit, which will be described later, when the grooved cam portions 102, 103 are rotated, with one end of the grooved cam portion 102 as the tenth step and the end of the other grooved cam portion 103 as the first step. The positions of the upper and lower shafts 107, 300L, 300R, 301L, and 301R are divided into the first step to the tenth step (circled numbers in FIG. 34),
The detection of these positions is performed by the optical sensor 321 fixed to the upper surface of the slide base 72 detecting the rotation of the detection disk 320 provided on the synchronous shaft 106.

23 to 25, the synchronous rotation drive mechanism 105 includes a synchronous shaft 106 rotatably supported on the left and right sides of the case mounting portion 53d of the slide base 53. , To the left of this sync axis 106,
Gears 107A and 108A are fixed to the right end portion. The left gear 107A is the gear 100 around the outer cam plate 87L, and the right gear 108A is the gear 100 around the outer cam plate 87R. It is in mesh. In addition, the drive motor 1 is installed in the case mounting portion 110.
The output shaft 111a of the drive motor 111 is fixed to the synchronous shaft 1 via a reduction gear mechanism 112.
It is linked to 06.

The loading unit 4 comprises a chassis unit 107 and a floating unit 108. The chassis unit 107 has a power train 110 including a loading motor 109 and a primary pulling mechanism from the magazine 1 as shown in FIG. 111
And a mechanical lock mechanism (not shown), and the floating unit 108 has a drive unit and a holder unit (not shown) for pulling and pressing the disk MD. The upper and lower guide shafts 300L, 300R, 301L, 301R are provided above and below the center of the left and right side surfaces 114b, 114c.
Is attached.

A first actuating piece 115 is located below the front surface of the chassis unit 107, and a second actuating piece 115 is located at the front end of the left side surface of the chassis unit 107 at a level higher than that of the first actuating piece 115. The respective operating pieces 116 are provided. The first actuating piece 115 has a central and right slit 59 formed at the rear edge of the magazine base 33.
The interference portions 58Ba and 58Ca protruding from B and 59C
The second actuating piece 116 interferes with the interference portion 58Aa protruding from the left slit 59A.

The left and right guide shafts 300 of the chassis unit 107 of the loading unit 4
L, 300R, 301L, 301R have guide holes 84l, 84R formed in the left and right side surfaces 70L, 70R of the case 70 of the lifting unit 3 inserted therein, and the left guide shafts 300L, 301L have left inner sides. It penetrates through the hole cam 88 of the cam plate 86L and is inserted in the guide cam 101 of the left outer cam plate 87L, and the right guide shafts 300R and 301R penetrate the hole cam 88 of the right inner cam plate 86R. And is inserted in the guide cam 101 of the right outer cam plate 87R.

Next, the operation of the disc player configured as described above will be described. Each tray 1 of the magazine 1
Disk MD is accommodated in 7, and this disk MD
Is held by the engagement protrusion 12a of the disk holder spring 12 engaging with a hole for preventing erroneous erasure or a predetermined hole. Further, the protrusion 22 of the stopper piece 21 of the tray 17 is locked in the hole for the turntable of the disk MD to prevent the tray from falling off at the time of impact. Further, the elastic force of the protrusion 22 presses the disk MD in the MD cartridge against the inner wall of the cartridge,
Rattling between the disc MD and the cartridge is prevented.

The stock pitch of the disk MD is 7 each.
Since it is predicted that the target disk MD cannot be quickly replaced because it is as narrow as mm, the tray 1 is used in this embodiment.
The disk MD is pushed out together with the 7 to facilitate replacement.

To replace the disk MD, push the trace topper 24 against the spring 29 to move the trace topper 24 in the axial direction,
The small diameter portion 25b is located in the large diameter hole portion 19 of the tray 17 where the large diameter portion 25a of the trace topper 24 was located.
Then, the tray 17 is pulled out by hooking and pushing the pushing portion 23 of the tray 17 protruding outside from the slit 7 of the case 5, and the end portion is pushed by the hooking portion 17a of the tray 17 so that the disk MD is pulled out. Be done.
In this case, the small diameter portion 25 a of the trace topper 24 enters the rear portion of the long hole 20 from the large diameter hole portion 19 of the long hole 20.

As described above, the magazine 1 in which the trays 17 accommodate the discs MD is detachably attached to the left and right and central magazine accommodating portions A, C and B of the base unit 2. That is, in the left magazine accommodating portion A, the magazine 1 is inserted into the magazine accommodating opening a, and the guide groove 1 formed in the lid 5f of the magazine 1
4, the guide pin 46 of the magazine guide mechanism 42 is inserted, and the guide 36 of the column 34 is inserted into the guide groove 11 on the right side of the magazine 1. When the magazine 1 is pushed in this state, the sliding pin 65 of the magazine ejecting mechanism 45 engages with the engaging recess 16 formed at the rear edge of the lid 5f of the magazine 1, and the rack member 66 causes the magazine 1 to move. Along with the movement of, the spring 67 moves against the spring 67.

Near the end point of pushing in this magazine 1,
Locking groove 31 formed on the lid 5f of the magazine 1
In addition, the locking pin member 5 of the magazine locking mechanism 43
6 is inserted, the locking pin member 56 is guided by the cam surface 31a of the locking groove portion 31 and moves leftward to be inserted and locked in the locking portion 31a of the locking groove portion 31. In this case, as shown in FIG. 17, the lock plate 50 moves against the spring 57 by the movement of the locking pin member 56, and the trigger plate 58 of the locking release mechanism 44 is rotated leftward.

When the magazine 1 is accommodated in the right magazine accommodating portion C, the guide 37 of the column 35 is inserted into the guide groove 11 on the left side of the magazine 1 and the magazine 1 is accommodated in the central magazine accommodating portion B. When storing, the guides 3 of the columns 34 and 35 are placed in the guide grooves 11 on the left and right side portions of the magazine 1.
6, 37 will be inserted.

Further, since the magazine 1 is a cube, if there is an action point of the pushing force on the lower surface (lid 5f) side of the magazine 1, the magazine 1 is likely to fall backward around the action point. Although a rotation moment is generated, since the guide 36 (37) of the support column 34 (35) is inserted into the guide groove 11 of the magazine 1 as described above, it is possible to suppress the fall due to this rotation moment.

"Magazine 1 Selection Operation (Left and Right Sliding Operation)" The traveling motor 7 of the slide drive mechanism 71a.
By driving 8 the rack gear 83 is rotated via the gear mechanism 79, and the rack member 76 of the rack gear 83 rolls on the rack 76a to move the elevating mechanism 84 (elevating unit 3) in the left-right direction.

The position detecting optical sensor 310 moves together with the elevating unit 3 to move the base plate 72.
The slits 72a formed in 1 are read to select and eject the magazines 1 located in the magazine accommodating portions A, C, and B.
The position detection switch 311 moves together with the slide base 53 to detect the cam 312 formed on the rack member 76 and set the initial position. In the embodiment, the center (magazine storage B
Position) to the initial position (standby),
It uses a two-contact switch.

[Selection Operation of Magazine 1 (Up / Down Operation)] By driving the drive motor 111 of the synchronous rotary drive mechanism 105 of the elevating unit 3, the synchronous shaft 106 is rotated through the reduction gear mechanism 112, and the synchronous shaft 106 is rotated. The left and right outer cam plates 8 via the left and right gears 107A and 108A
7L and 87R are synchronously rotated.

When the loading unit 4 that holds the lifting mechanism 84 so as to be movable up and down is at the uppermost position (a state in which the 10th step is selected as the uppermost disk storage position of the magazine), the upper guide shafts 300L, 3L of the loading unit 4 are
00R is a left and right outer cam plate 87 via a linear cam portion 89 of one of the left and right inner cam plates 86L, 86R.
One groove-shaped cam portion 102 of the L, 87R guide cam 101
NISOUNYUUSARE, which is regulated by the cam portion 102, the lower guide shafts 301L and 301R of the loading unit 4 are provided with the left and right outer cam plates 86L and 86R through the bulging cam portions 92. It is inserted in the connecting portion 99 of 87L and 87R (see FIG. 34 (1)).

In this state, the left and right outer cam plates 87
When L and 87R are rotated clockwise (clockwise direction) in FIG. 34, the loading unit 4 is lowered by the upper guide shafts 300L and 300R that are regulated by the grooved cam portion 102. At this time, the lower guide shafts 301L and 301R are provided with the grooved cam portion 102.
It is free without being subject to regulations. Then, the loading unit 2 continues to descend, passes through the position of the seventh step as shown in FIG. 34 (2), and reaches the upper and lower sides from the sixth step to the fifth step shown in FIG. 34 (3). Guide shafts 300L, 30
0R, 301L, and 301R are two grooved cam portions 102,
At the fourth stage, the lower guide shafts 301L and 301R are engaged with the groove-shaped cam portion 103.
Of the upper guide shafts 300L, 300
R becomes free. Then, the left and right outer cam plates 8
By the clockwise rotation of 7L and 87R, the state becomes the bottom (first stage selection) shown in FIG. 34 (5).

By the way, the outer cam plates 87L, 87
Since the R guide cam 101 has a position where the grooved cam portions 102 and 103 intersect with each other, the guide shafts 300L, 300R, 301L, and 301R become the target grooved cam portions 102 and 103 unless some restrictions are imposed. Do not fit. That is, taking the case where the loading unit 4 descends as an example, the upper guide shafts 300L and 300R are shown in FIG.
From the position of ◆ of the grooved cam portion 102 as shown in (1),
34 (2), the guide shafts 300L and 300R are moved to the grooved cam portion 103.
It is necessary to regulate so as not to move to the side (position), that is, to move to the grooved cam portion 102. Therefore, the hole-shaped cams 88 of the inner cam plates 86L and 86R are commonly used.

As described above, the outer cam plates 87L, 8
When the loading unit 4 starts descending from the position of the 10th step by 7R, the rotational force is also applied to the inner cam plates 86L and 86R.
Since the guide shafts 300L and 300R are engaged with the linear cam portion 89 of one of the hole-shaped cams 88 formed in the L and 86R, they cannot rotate.

The loading unit 4 continues descending,
After passing the position of the step, the guide shafts 300L, 30
Since 0R reaches the inside of the one bent cam portion 90, the inner cam plates 86L and 86R can rotate. The inner cam plates 86L and 86R are in contact with the outer cam plates 87L and 87R with a predetermined elastic force by their spring side portions 93, and thereafter, the inner cam plates 86L and 86R are also rotated as the outer cam plates 87L and 87R rotate. It is urged in the same direction. As a result, the gears 107A and 108A mesh with one of the pair of meshing tooth portions 98, and the inner cam plates 86L and 86R only move during the meshing.
It rotates in synchronization with 6L and 87R.

During this synchronous rotation, the upper guide shafts 300L and 300R move toward the inner cam plate 86L and
The curved cam portion 90 on one side of 86R and the area a (FIG. 32) of the outer cam plates 87L and 87R pass through.

After this passage, the gears 107A and 108A and one meshing tooth portion 98 are disengaged from each other, and the gear 107
A and 108A are located between a pair of meshing tooth portions 98.
Further, since the upper guide shafts 300L and 300R move to the ends of the constricted cam portions 91, only the outer cam plates 87L and 87R continue to rotate thereafter, and the inner cam plates 86L and 86R are prohibited from rotating (FIG. 34).
(2)).

At this time, the guide shafts 300L, 30
0R is located at the intersection of the grooved cam portion 103 and the grooved cam portion 102, but the shafts 300L and 300R are guided by the constricted cam portion 91 and do not move to the grooved cam portion 103 side, and the groove is left as it is. The cam portion 102 is advanced (see FIG. 34).
(3)).

As the guide shafts 300L and 300R rotate, the upper guide shafts 300L and 300R
Moves from the constricted cam portion 91 to the bulging cam portion 92, and the shafts 300L and 300R move to the outer cam plates 87L and
It becomes possible to rotate in the same direction as 87R, but this time, the lower guide shafts 301L, 301R move from the bulging cam portion 92 to the constricted cam portion 91 side, which still restricts the rotation of the inner cam plates 86L, 86R. It is still done.

At this time, the upper guide shaft 300
L and 300R try to come out from the grooved cam portion 102 toward the connecting portion 99 side, but the lower guide shaft 301L,
301R enters the grooved cam portion 103 side from the communication portion 99 (FIG. 34 (3)). Accordingly, the lifting control of the loading unit 4 is performed by the upper guide shaft 300L,
Guide shafts 301L and 301R below 300R
It will be handed over to and will be continued.

When the outer cam plates 87L, 87R further rotate, the lower guide shafts 301L, 301R move from the constricted cam portion 91 to the curved cam portion 90, as shown in FIG. 34 (4). As a result, the inner cam plates 86L and 86R are urged in the same direction by the rotational force of the outer cam plates 87L and 87R, as described above with reference to FIG. 2B, which causes the gears 107A and 108A to mesh with each other. The inner cam plates 86L and 86R are engaged with the other of the tooth portions 98, and the inner cam plates 86L and 86R are engaged only during the engagement.
It rotates in synchronization with 7L and 87R. During this synchronous rotation, the upper guide shafts 300L and 300R move to the other bent cam portion 9 of the inner cam plates 86L and 86R.
0 and the inside of the regions a (FIG. 32) of the outer cam plates 87L and 87R (FIG. 34 (4)).

After this passage, the gears 107A and 108A and the other meshing tooth portion 98 are disengaged from each other. Further, since the lower guide shafts 301L and 301R move to the end portions of the linear cam portion 89, thereafter, the outer cam plates 87L and 87L,
Only 87R continues to rotate and inner cam plates 86L, 8
6R rotation is prohibited.

At this time, the guide shafts 301L, 301
R is located at the intersection of the grooved cam portion 103 and the grooved cam portion 102, but the shafts 301L and 301R are guided by the linear cam portion 89 and do not move to the annular cam portion 103 side.
As it is, it proceeds on the grooved cam portion 102 side. Thus, the descent control of the loading unit 4 can be finally performed.

When the loading unit 4 is raised, the left and right outer cam plates 87L, 87R are rotated counterclockwise (counterclockwise direction), which is the reverse of the above-described case of lowering. The outer cam plates 87L, 87
The guide cam 101 of R is connected to the gears 107A and 108 at the end of the synchronous shaft.
It is determined that the rotation of A can shift the loading unit one step.

When an object (controlled object) is moved up and down by using the rotating cam as shown in FIG. 32, the operation stroke is the maximum stroke corresponding to the radius of the rotating cam. As described above, the cam groove is crossed (that is, the grooved cam portion 102 and the grooved cam portion 103 are crossed), and the control member (the inner cam plate 86L , 86R)
Since the control object is provided, the operation stroke of the controlled object can exceed the radius of the rotating cam.

Further, in the above-described embodiment, the connecting portion 99 is provided in the middle portion of the two intersecting cam grooves (the groove-shaped cam portion 102 and the groove-shaped cam portion 103), and each of the cam grooves is formed by using the connecting portion 99. Pin supported by (upper guide shaft 300
L, 300R and lower guide shafts 301L, 301
Although R) is switched (changed), the connecting portion 99 is not provided and a closed curve is formed using a single cam groove.
The controlled object may be controlled by only a single pin.

As described above, the upper guide shafts 300L and 300R, and the lower guide shaft 301.
When L and 301R reach the curved cam portion 90, the regulation on each guide shaft is removed, and at this time (synchronization start timing), the inner cam plate 86L,
86R is rotated as the outer cam plates 87L and 87R are rotated, and as a result, the meshing tooth portion 98 is moved to the gear 107.
A and 108A are meshed with each other, but in order to reliably perform this meshing (that is, the rotating operation of the inner cam plates 86L and 86R at the time when the regulation for each guide shaft is removed), as shown in FIG. One piece 93
Of the outer cam plates 87L, 87R, and the projections 95 are provided on the end portions of the surfaces on the outer cam plates 87L, 87R side, and the projections are formed on the surfaces of the outer cam plates 87L, 87R facing the projections 95 of the inner cam plates 86L, 86R at the synchronization start timing. It is preferable to form recesses 104 and 105 (FIG. 32) that can be engaged with 95.

In this way, the inner cam plates 86L, 86
At the synchronization start timing of R, the projection 95 and the recess 10
4 or 105 are engaged with each other, so that the inner cam plates 86L and 86R become the outer cam plates 87L and 87R.
It is possible to reliably rotate in synchronism with the rotating operation of.

When the loading unit 4 comes to a predetermined disc take-out position of the magazine 1 by the operation of the slide mechanism 71 and the raising / lowering mechanism 84, the primary pull-out mechanism 11 provided in the chassis unit 107 is actuated to make the disc MD. A predetermined amount, and then the primary pull-out mechanism 11 is reversely operated to pull the disc MD into the loading unit 4 to release the grip of the disc MD and prepare for secondary loading.

Next, the secondary pull-out mechanism of the loading unit 4 operates to pull the disc MD into the holder. Then, the disc MD is placed on the turntable. Then, the mechanical lock mechanism operates to release the suspension chassis of the floating unit 4.

The eject operation of the disc MD is
The motor 108 is reversely rotated by an eject signal from the outside to eject the disc MD by the reverse operation of loading.

When ejecting the magazine 1 from the magazine holder, the first of the loading unit 4,
The second actuating pieces 115, 116 have the trigger plate 58.
Interference portions 58Aa, 58Ba, 58 of A, 58B, 58C
Interfering with Ca, these trigger plates 58A, 58B,
This is done by rotating 58C.

That is, the magazine 1 stored in the left magazine storage portion A is discharged as follows. As shown in FIG. 38, the loading unit 4 is moved to the left by the operation of the slide mechanism 71 from the state where the loading unit 4 is located at the position a by the operation of the slide mechanism 71 and the elevating mechanism 84. The second operating piece 116 interferes with the interference portion 58Aa of the trigger plate 58A, and the lock plate 50A is rotated by rotating the trigger plate 58A in the left direction.
To move the locking pin member 56 into the locking groove portion 31.
Of the sliding pin 6 and the rack member 66 is pulled back by the spring force of the spring 67.
4 moves to eject magazine 1. In this case, the gear 69 meshed with the rack 66a of the rack member 66.
Rotates and the damper 68 works to adjust the discharging speed of the magazine 1.

The magazine 1 stored in the central magazine storage B is discharged as follows. As shown in FIG. 38, the loading unit 4 is moved to the left by the operation of the slide mechanism 71 from the state where the loading unit 4 is located at the position a by the operation of the slide mechanism 71 and the elevating mechanism 84. Two
Of the trigger plate 58B interferes with the interference portion 58Ba of the trigger plate 58B, and the trigger plate 58B is rotated in the left direction to move the lock plate 50 to lock the locking pin member 56. The rack member 66 is disengaged from the locking portion 31a of the groove portion 31, and the rack member 66 is pulled back by the spring force of the spring 67, so that the sliding pin 64
Moves to eject the magazine 1. In this case, the gear 69 meshing with the rack 66a of the rack member 66 rotates and the damper 68 operates to adjust the ejection speed of the magazine 1.

The magazine 1 stored in the right magazine storage section C is discharged as follows. As shown in FIG. 38, the loading unit 4 moves to the right by the operation of the slide mechanism 71 from the state in which the loading unit 4 is located at the position C by the operation of the slide mechanism 71 and the elevating mechanism 84. The second operating piece 116 is the interference part 5 of the trigger plate 58C.
By interfering with 8Ca and rotating the trigger plate 58C in the right direction, the lock plate 50 is moved to disengage the locking pin member 56 from the locking portion 31a of the locking groove portion 31, The rack member 66 is pulled back by the spring force of the spring 67 and the sliding pin 64 moves to eject the magazine 1. In this case, the gear 69 meshing with the rack 66a of the rack member 66 rotates and the damper 68 operates to adjust the ejection speed of the magazine 1.

In this way, the ejecting operation of the magazine 1 is performed by the sliding operation by the loading unit 4,
Since that position is within the selection operation area of the disc MD, it is necessary to prohibit some random access.

[0078]

As described above, according to the present invention, the guide shafts formed on the left and right side surfaces of the case and provided on the left and right sides of the chassis of the loading unit for guiding the guide shafts in the vertical direction and the guide holes by rotation are provided. Since the rotary cam mechanism for moving the shaft in the vertical direction is provided, by rotating the rotary cam mechanism, the guide shafts provided on the left and right sides of the chassis of the loading unit can be guided in the vertical direction of these guide shafts. The loading shaft can be moved up and down by moving the guide shaft together with the guide hole in the vertical direction. Therefore, the device can be downsized even if the number of disks increases.

Further, the rotary cam mechanism is provided on the inner surface of the plate body with one and the other groove-shaped cam portions which are line-symmetrical with respect to a straight line e in the radial direction passing through the center of rotation a of the plate body and both groove-shaped cam portions. A guide cam is formed at a portion where the cam portions intersect with each other, and includes a connecting portion for connecting the two groove-shaped cam portions, and corresponds to a plurality of stages of disc storage areas in the magazine, and forms a guide cam into which the guide shaft is inserted. The left and right outer cam plates, and a plate body having a hole-shaped cam that is line-symmetric with respect to a radial straight line C passing through the center of rotation a of the plate body and one of the guide cams of the outer cam plate. The left and right outer cam plates having hole-shaped cams which are fitted to the intersecting portions of the other groove-shaped cam portions and connect the one and the other groove-shaped cam portions, and which have the hole-shaped cams through which the guide shafts penetrate, And a synchronous rotation drive mechanism for synchronously rotating the outer cam plate, the left and right outer cam plates are synchronously rotated by the drive of the synchronous rotation drive mechanism, and guide shafts are provided on the left and right of the chassis of the loading unit. With the guide holes of the case for guiding the guide shafts in the vertical direction and the inner cam plate, the guide shaft can be moved in the vertical direction to move the loading unit up and down, and the device can be downsized.

[Brief description of drawings]

FIG. 1 is a perspective view of a disc player provided with a loading unit lifting device according to the present invention with a part thereof omitted.

FIG. 2 is an exploded perspective view of the disc player with a part thereof omitted.

FIG. 3 is an exploded perspective view of a magazine.

FIG. 4 is a rear view of the magazine.

FIG. 5 is a plan view of the same magazine without a tray.

FIG. 6 is a left side view of the magazine.

7 is a cross-sectional view taken along the line DD of FIG.

FIG. 8 is a cross-sectional view of a mounted state of the trace topper.

FIG. 9 is a side view of the trace topper.

FIG. 10 is a plan view of the tray.

FIG. 11 is a plan view of a magazine holder in the base unit.

FIG. 12 is a magazine guide mechanism on the back side of the magazine base, a magazine lock mechanism, and an unlock mechanism;
It is a structure explanatory view with a magazine discharge mechanism.

FIG. 13 is a plan view of a lock plate of the magazine lock mechanism.

14 is a view from the direction E in FIG.

FIG. 15 is a front view of a trigger plate of the unlocking mechanism.

FIG. 16 is a plan view of the trigger plate.

FIG. 17 is an explanatory diagram of a locked state of the magazine.

18 (1) and 18 (2) are illustrations of ejecting a magazine.

FIG. 19 is a front view of the lifting unit.

FIG. 20 is a side view of the lifting unit.

FIG. 21 is a view as seen from the direction of the arrows in FIG. 20G-G.

FIG. 22 is a plan view of a slide mechanism.

FIG. 23 is a plan view of a synchronous rotation drive mechanism.

FIG. 24 is a view from the direction H in FIG. 23.

25 is a view from the direction of I in FIG. 23.

FIG. 26 is an explanatory diagram of an optical sensor and its detection unit.

FIG. 27 is an explanatory diagram of a switch and its detection unit.

FIG. 28 (1) is an explanatory diagram of an output signal of the optical sensor. (2) is an explanatory diagram of an output signal of the switch.

FIG. 29 is a plan view of the lifting mechanism.

FIG. 30 is a front view of a case of the lifting mechanism and a chassis portion of a loading unit that is vertically movable in the case.

FIG. 31 is a side view of the inner cam plate.

FIG. 32 is an inner view of the outer cam plate.

33 is a cross-sectional view taken along the line JJ of FIG.

34 (1) to (5) are behavior explanatory diagrams of the outer cam plate when the floating unit moves from the uppermost position to the lowermost position.

FIG. 35 is a plan view of the chassis of the loading unit.

FIG. 36 is a front view of the chassis.

FIG. 37 is a side view of the chassis.

FIG. 38 is an explanatory diagram of ejecting a magazine.

[Explanation of symbols]

1 Magazine 4 Loading Unit 70 Case 84L, 84R Guide Hole 107 Chassis Unit 300L, 300R, 301L, 301R Guide Shaft 600 Rotating Cam Mechanism MD Disc

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[Procedure amendment]

[Submission date] November 22, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0053

[Correction method] Change

[Correction content]

By the way, the outer cam plates 87L, 87
Since the R guide cam 101 has a position where the grooved cam portions 102 and 103 intersect with each other, the guide shafts 300L, 300R, 301L, and 301R become the target grooved cam portions 102 and 103 unless some restrictions are imposed. Do not fit. That is, taking the case where the loading unit 4 descends as an example, the upper guide shafts 300L and 300R are shown in FIG.
(1) after the ▲ 10 ▼ position of groove-like cam portion 102, reaches the position of the mobile to a (FIG. 34 (2)) where as, the guide shaft 300L, 300R are groove-like cam portion 103 It is necessary to regulate so as not to move to the side (position), that is, to move to the grooved cam portion 102. Therefore, the inner cam plates 86L, 86R are
The hole-shaped cam 88 is commonly used.

Claims (2)

[Claims] 1. A guide hole which is formed on the left and right side surfaces of the case and which guides guide shafts provided on the left and right of the chassis unit of the loading unit in the vertical direction, and a rotary cam which moves the guide shaft in the vertical direction by rotation. A loading unit lifting device for a disc player, which is provided with a mechanism. 2. The rotating cam mechanism is provided on the inner surface portion of the plate body, with one and the other groove-shaped cam portions and both groove-shaped curved portions which are line-symmetrical with respect to a straight line e in the radial direction passing through the center of rotation of the plate body. A guide cam is formed at a portion where the cam portions intersect with each other, and includes a connecting portion for connecting the two groove-shaped cam portions, and corresponds to a plurality of stages of disc storage areas in the magazine, and forms a guide cam into which the guide shaft is inserted. The left and right outer cam plates and the plate body intersect with the grooved cam portions of the guide cams of the outer cam plate which are line-symmetric with respect to the radial straight line C passing through the center of rotation a of the plate cam. Left and right outer cam plates having hole-shaped cams through which the guide shaft penetrates, and one and the other grooved cam portions are connected to each other 2. A loading unit lifting device for a disc player according to claim 1, wherein the loading unit elevating device comprises a synchronous rotation drive mechanism for synchronously rotating.