JPH0244382Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention is suitably implemented in a disk loading device used for loading a disk used as a recording medium such as an audio disk or a video disk for playback or recording. This invention relates to a disk elevating mechanism that can be used to raise and lower a disk.

BACKGROUND ART A typical prior art is disclosed in Japanese Patent Application Laid-Open No. 58-85966, which is shown in a simplified manner in FIG. To record/play back a magnetic tape cassette 120, the magazine 118 containing the cassette 120 has a stud 116 that fits into a slot 114 in the upright 112. The movable plate 122 is disposed on the side of the upright portion 112, and the upright portion 112 and the movable plate 122 are disposed on the left and right sides of the magazine 118, respectively. Each moving body 122 has a rack 12
6 is formed, and a pinion 128 that meshes with this rack 126 is fixed to a rotating shaft 130 rotatably provided on the frame. The two left and right moving plates 122 are fixed to the same rotating shaft 130. An eccentric plate 133 is fixed to the rotating shaft 130, and a spring 134 is connected to the stud 132 of the eccentric plate 133, which is connected to a lug 136 of the frame.

Each displacement plate 122 has two slots 124, angled and parallel, through which the studs 116 pass. The protrusion 139 formed on the upright portion 112 is inserted through the guide hole 140 of the movable plate 122 and is prevented from coming off by a snap spring 138.

Movement of pinion 128 from the fully ejected position of cassette 120 in the direction of arrow 141 causes stud 116 to move horizontally along slot 114 from end 114a of slot 114 and then By being displaced downwardly as indicated by arrow 142, stud 116 moves along slot 114 to end 114b. At this time, the stud 116 moves from one end 124a of the slot 124 to the other end 124b,
The moving plate 122 moves in the direction of arrow 143, and in response, the pinion 128 and eccentric plate 133 move approximately 180 degrees in the direction of arrow 144 from the state shown in FIG.
angularly displaced. In this way, the cassette 120 is in a stored state.

To eject the cassette 120, the pinion 128 is driven in the opposite direction of the arrow 144 by the motor, and the axis of the spring 134 crosses the axis of the rotating shaft 130, so that the spring force of the spring 134 causes the pinion 128 to be ejected into the magazine 118. cassette 120 is ejected in the opposite direction of arrow 141.

If such a configuration regarding the magnetic tape cassette 120 is applied to a disk, the following problems arise. A laser pick-up that can move over a wide range is provided below the tray for supporting the disk. Therefore, if there is a rotating shaft 130 below the tray, it is necessary to take care not to interfere with the movement of the laser pick-up. In addition, the structure must be configured so as not to block the laser beam, which reduces the degree of freedom in design.

If the rotating shaft 130 is provided above the tray that supports the disk, there is a clamp mechanism that moves up and down above the tray to hold and clamp the disk on the tray, which may interfere with the operation of the clamp mechanism. The rotating shaft 130 must be defined so as not to occur, which also reduces the degree of freedom in design. As a result, it becomes necessary to provide the rotating shaft 130 below the laser pickup or above the clamp mechanism, which increases the height of the apparatus.

In addition, the disk tray must be constructed so that it can be carried in and out of the main body of the apparatus in order to take in and take out the disk. Therefore, the structure shown in FIG. If it were to be applied to lift and lower, the pinion 128 and the motor that drives it would have to be taken out and brought in together from the main body of the device, and doing so would increase the height of the entire device. , the degree of freedom in designing the disk tray lifting mechanism is reduced.

An object of the present invention is to provide a disk elevating and lowering mechanism that can increase the degree of freedom in design and keep the height of the entire device low.

Embodiment FIG. 1 is a perspective view of an embodiment of the present invention. A disk 1 as a recording medium is inserted through an entrance 3 into a body 2 of audio equipment or video equipment for reproducing the recorded contents of the disk 1 or recording on the disk 1.

2 is a simplified plan view showing the internal structure of one embodiment shown in FIG. 1, FIG. 3 is a front view of FIG. 2, and FIG. 4 is a right side view of FIG. 2. It is. Referring to these drawings, a loading motor 11 for loading the disk 1 is provided on the right side of the disk 1, and a worm 13 is provided on a rotating shaft 12 of the motor 11. Gears 14 and 15 are disposed on the worm 13 so that their rotation axes are perpendicular to the longitudinal direction of the worm 13. The gear 14 has an idler gear 1.
4a can be engaged.

Above the bottom 2a of the body 2 (see FIG. 3), there is a first case 16 for inserting and ejecting a disk, and a second case 17 that supports the first case 16.
are arranged vertically and parallel to each other. The first case 16 is arranged above the second case 17. A disk tray 39 for mounting the disk 1 is housed between the first case 16 and the second case 17. A rack 18 is provided on the lower surface of the right side of the first case 16, and this rack 18 meshes with the gear 14. The rotational driving force from the gear 14 is easy 18
The signal is transmitted to the first case 16 via the first case 16, thereby allowing the first case 16 to be displaced in the vertical direction in FIG. The second case 17 is also provided with a rack 19, which is connected to the gear 1.
It is meshed with 5. The rotational driving force from the gear 15 is transmitted to the second case 17 via the rack 19, so that the second case 17 can also be displaced in the vertical direction in FIG. A roller 20 is disposed in contact with the second case 17,
This allows the first case 16 and the second case 17 to move smoothly.

When the disk 1 is placed on the disk tray 39 and inserted from the entrance 3 of the fuselage 2 to a predetermined position,
The disk 1 is pressed onto the turntable 22 by a clamp mechanism 21, which will be described later, and loading is completed.

FIG. 5 is a simplified plan view of the clamp mechanism 21 in the fuselage 2 and its related configuration, FIG. 6 is a front view of FIG. 5, and FIG. 7 is a right side view of FIG. 5. It is. A clamp mechanism 21 is arranged above the disk 1. A turntable 22 is provided below the disk 1, and a spindle motor 23 for rotating the turntable 22 is provided below the turntable 22. The rotation shaft of this motor 23 is inserted through the rotation center of the turntable 22 and fixed.

A pickup 24 is also provided above the disk 1 for detecting the signals recorded on the disk 1, and can be moved vertically in FIG. 5 by a pickup feeding motor 25. To explain in more detail, pick up 24
is supported by a bearing holder 24a,
This bearing holder 24a has a support shaft 24b attached to the support shaft 24b.
It is mounted so that it can be displaced along the axial direction of b. A worm 26 is provided on the rotating shaft of the motor 25, and a gear 27 is meshed with the worm 26. A rack 28 is meshed with the gear 27. This rack 28 is fixed to the pick-up 24, and the rotational driving force from the motor 25 is applied to the worm 2.
6, a gear 27, and a rack 28 to the pick-up 24, so that the pick-up 24 can be displaced in the vertical direction in FIG. 5 along the support shaft 24b.

On both sides of the disk tray 39 on which the disk 1 is mounted, lifting levers 40 and 41 are provided as support members that support the disk tray 39 so as to be able to move up and down.
is provided. Arms 31 and 32 are provided close to the upper ends of the lifting levers 40 and 41, and these arms 31 and 32 are connected by a connecting rod 30. The arm 31 is rotatably supported by a pin 87 on a movable body 34 that is vertically movable in FIG. A rack 34a is formed on a portion of the upper surface of the movable body 34.
This rack 34a is meshed with a gear 38. A worm 36 is fixed to the rotating shaft of a clamp motor 35 serving as an electric drive means 35, and the rotational driving force of the motor 35 is generated by the worm 36, gear 37,
38, is transmitted to the movable body 34 via the rack 34a, whereby the movable body 34 can be displaced in its longitudinal direction. As the slider 34 is displaced, the disk tray 39 and the clamp section 49 can be moved up and down as described later.

8 is a perspective view of the clamp mechanism 21, FIG. 9 is an exploded perspective view of FIG. 8, FIG. 10 is a plan view of FIG. 8, and FIG. 11 is an arrow mark in FIG. FIG. 16 is a side view seen from the B side, and FIG. 16 is a simplified front view illustrating the lifting and lowering operation. The clamp mechanism 21 includes a clamp part 49 for pressing the disc 1 onto the turntable 22, and a clamp part 49 for pressing the disc 1 onto the turntable 22.
A first clamper arm 50 as a first drive member that supports the clamper arm 9 in a vertically movable manner, a second clamper arm 51 as a second drive member, and a clamper arm 50,
51 and a holding member 52 that holds the holding member 51.
The first clamper arm 50 includes a plate-shaped portion 53 that extends in the horizontal direction, and a hanging portion 54 that is connected to the plate-shaped portion 53 and extends downward in the vertical direction. The second clamper arm 51 also includes a plate-like portion 55 and a hanging portion 56. The tip of the plate-shaped portion 53 (the left side in FIG. 8) is formed into a U-shape, and each portion 5 of this U-shape
The clamp part 49 fits between 0a and 50b,
It is pivotally supported on the plate-shaped portion 53 by a fixing pin 57 .
The second clamper arm 51 also has a similar configuration to the first clamper arm 50, and has a fixing pin 58.
The clamp portion 49 is pivotally supported by.

A clamper arm holding member 52 is provided surrounding the hanging parts 54 and 56. The first clamper arm 50 is pivotally supported on the holding member 52 by a pivot pin 50, and the second clamper arm 51 is supported by a pivot pin 60.
is pivotally supported on the holding member 52 by. Therefore, the first clamper arm 50 can be angularly displaced around the axis of the pivot pin 59, and the second clamper arm 51 can be angularly displaced around the axis of the pivot pin 60.

A torsion spring 91 is attached to the outer periphery of the pivot pin 59, and both ends of this torsion spring 91 are fixed to the holding member 52. Therefore, the first
The clamper arm 50 is spring biased in the counterclockwise direction indicated by arrow C in FIG. 1st
A second clamper arm 51 is disposed below the clamper arm 50, and a portion of the second clamper arm 51 passes through an elongated hole 61 formed from the plate-shaped portion 53 to the hanging portion 54 of the first clamper arm 50. Insert. Hanging portion 5 of first clamper arm 50
4 and the hanging portion 56 of the second clamper arm 51,
They are rotatably connected by individual pins 64 and 65 via a connecting member.

An extending piece 62 extending horizontally from the hanging portion 54 of the first clamper arm 50 has a cylindrical projection 10.
0 is set up. A moving body 34 is provided in contact with this protrusion 100. As described above, this movable body 34 is movable in its longitudinal direction, and has a rack 34a formed on its upper surface. motor 35
The rotational driving force from the worm 36, gears 37, 3
8, is transmitted to the movable body 34 via the rack 34a, thereby making it possible for the movable body 34 to be displaced.

A cam surface 6 is provided on the side near the tip of the moving body 34.
3 is formed. This cam surface 63 includes a flat plate portion 63a parallel to the moving direction D of the moving body, and a flat plate portion 63a parallel to the moving direction D of the moving body.
3a and an inclined guide portion 63b that is inclined inward (to the left in FIG. 10) from the upstream side to the downstream side in the moving direction D. Since the first clamper arm 50 is spring biased counterclockwise, the protrusion 100
is constantly guided in contact with the cam surface 63. When the movable body 34 having such a configuration is displaced along the longitudinal direction, the protrusion 100 is pressed by the cam surface 63, so that the protrusion 100 is displaced in a direction parallel to the width direction of the movable body 34. . By displacing this protrusion 100, the first
The clamper arm 50 can be angularly displaced around the axis of the pivot pin 59.

Next, the operating state of the clamper mechanism 21 will be explained. When the disc 1 is placed on the turntable 22, the motor 35 is started and the motor 35
as a driving source, a worm 36, gears 37, 38
The moving body 34 moves along the moving direction D via the moving body 34 . Therefore, the first clamper arm 50 is rotated clockwise around the axis of the pivot pin 59 by the cam surface 63. At this time, the clamp part 49 is attached to one end of the clamper arms 50, 51, and the clamper arms 50, 51 are attached to the connecting member 7.
0 through individual pins 64 and 65, and the pins 59 and 60 are connected by reference numerals l1,
Reference mark l2 between pins 64 and 65, pins 57 and 58
Reference mark l3 between pins 59 and 57, reference mark l between pins 59 and 57
4. Between pins 60 and 58, refer to l5, pin 59,
If the space between pins 64 and 64 is designated by reference numeral 16, and the space between pins 60 and 65 is designated by reference numeral 17, the following first equation holds true.

l1=l2=l3 l4=l5...(1) l6=l7 That is, the fixed pins 57, 58 and the pivot pin 59,
60 is a parallelogram, and the pivot pins 59, 60 and the individual pins 64,
The quadrilateral formed by 65 and 65 is a parallelogram. Therefore, when the connecting member 70 is displaced in the horizontal direction, the clamp 49 supported by the fixing pins 57 and 58 descends parallel to the turntable 22, as shown by the imaginary line n1 in FIG. do.

The lifting and lowering operation of the clamp mechanism 21 mentioned above will be explained with reference to FIG. 16. The protrusion 100 is always on the cam surface 63
16, the protrusion 100 is in the left direction in FIG. 16, as shown in FIG. , the clamp 41 is raised. When the moving body 34 moves in the direction D, the first
6. As shown in FIG. 2, the protrusion 100 moves to the right in FIG. 16, and the clamp 49 descends.

FIG. 12 is a sectional view of the clamp portion 49. The clamp section 49 includes a clamper 75 for fixing the disk 1 mounted on the turntable 22.
The clamper case 76 includes a clamper case 76 that rotatably holds the clamper 75, and a clamper case cover 77 that covers an upper opening 76a of the clamper case 76. The clamper 75 is made of a permanent magnet and includes a right cylindrical portion 75a and a flange portion 75b extending horizontally from the top of the right cylindrical portion 75a. A fitting hole 75c is formed concentrically in the right cylindrical portion 75a, and the turntable 2
A protrusion 78 provided at the center of rotation on 2 and protruding upward can be fitted into this fitting hole 75c.

The clamper 75 is rotatable around the axis because the flange portion 75b is housed in the space formed by the clamper case 76 and the clamper case cover 77. Therefore, when the turntable 22 rotates after the clamper 75 fixes the disk 1 on the turntable 22, the disk 1 can also rotate in accordance with the rotation of the turntable 22.

A protrusion 79 is provided on the upper surface of the clamper 75 and protrudes upward along the rotation axis. A pressing portion 77a is provided on the lower surface of the clamper case cover 77 in correspondence with the protrusion 79. The turntable 22 arranged below the clamper 75 is made of ferromagnetic material. The rotation axis of the motor 23 is common to the axis of the turntable 22, and is fixed by being inserted through the turntable 22 and the protrusion 78.

When disk 1 is loaded into the turntable,
As described above, the clamp part 49 is lowered horizontally by the clamper arms 50 and 51. At this time, the clamper arms 50 and 51 are lowered by the spring force of the spring 91, and this spring force is transmitted to the clamper 75 via the pressing portion 77a and the protrusion 79 of the clamper case cover 77. The disk 1 is clamped by this spring force and the magnetic attraction force between the clamper 75 and the turntable 22.

In this way, since the clamping force for clamping the disk 1 onto the turntable 22 is made to use both the spring force and the magnetic attraction force, the motor 23
The load on the clamper 75 is reduced, and positioning of the clamper 75 in the clamped state is facilitated.

In this embodiment, the clamper 75 is a permanent magnet,
Further, although the turntable 22 is made of a ferromagnetic material, in other embodiments, both the clamper 75 and the turntable 22 may be made of a permanent magnet, or the clamper 75 may be made of a ferromagnetic material and the turntable 22 may be made of a permanent magnet. Alternatively, for example, a permanent magnet may be housed in the clamper 75. That is, the clamper 75 and the turntable 22 may be provided with magnetic attraction means in association with each other so that a magnetic attraction force is generated between the clamper 75 and the turntable 22.

FIG. 13 is a perspective view showing the disk tray 39 and its related configuration, and FIG.
15 is an exploded perspective view of FIG. 3, and FIG. 15 is a simplified right side view illustrating the raising and lowering operation of the disk tray 39. One side of the disk tray 39 (13th
On the right side of the figure), a lever 40 for raising and lowering the disk is provided so as to be movable in its longitudinal direction. Approximately S-shaped guide holes 80 and 81 are formed at both ends of the disk lifting/lowering lever 40. As shown in FIG. This guide hole 8
0 and 81, bracket portions 82 and 83 are provided upright on the peripheral edge of the disk tray 39.
The bracket portions 82 and 83 include the bracket portion 8.
Guide pins 84, 85 are provided which are perpendicular to 2, 83 and project outwardly. The guide pins 84 and 85 are inserted through guide holes 80 and 81. The configuration related to the lifting lever 40 is also the same for another disk lifting lever 41 disposed on the other side of the disk tray 39. In the lifting lever 41, a portion corresponding to the lifting lever 40 is given a subscript a.

The arms 31, 32 disposed close to the upper end portions 92, 93 of the lifting levers 40, 41 (the right side in FIG. 13) have ends 92, 93 of the levers 40, 41. Pressing rods 86, 8 for pressing
7 is provided. The arm 31 has a movable body 34 and a pin 8 inserted into a long hole 101 provided in the movable body 34.
8. The rotational movement of arm 31 is transmitted to arm 32 via guide rod 30, so that arm 32 is also rotated in the same direction as arm 31. In addition, the lifting lever 4
0 and 41 are biased in the same direction as the moving direction D by springs 89 and 90.

Next, the raising and lowering operation of the disk tray 39 will be explained. When the motor 35 is driven as described above, the moving body 34 moves in the direction of arrow D (see FIG. 13).
As a result, the arms 31 and 32 are rotated in the direction of arrow E. Therefore, the pressure rods 86, 8
7 presses the end portions 92, 93 of the lifting levers 40, 41 to move the levers 40, 41 as shown by the imaginary line n2 in FIG. This lever 4
Corresponding to the movement of 0 and 41, guide pins 84 and 8
5, 84a, 85a are guide holes 80, 81, 80
a, 81a and is displaced downward, thereby lowering the disk tray 39. The raising operation of the disk tray 39 is performed by the reverse operation of the lowering operation. That is, the moving body 34 moves in the direction opposite to the arrow D, and therefore the arms 31 and 32 rotate in the direction opposite to the arrow E. This allows the lifting levers 40, 41 to be displaced in the direction of arrow D, and also allows the lifting levers 40, 41 to move in the direction of arrow D.
1 is biased in the direction of arrow D by springs 89 and 90, so that the lifting levers 40 and 41 move in the direction of arrow D.
direction. This allows guide pin 8
4, 85, 84a, 85a are guide holes 80, 81,
The disk tray 39 is guided by 80a and 81a and is displaced upward to rise.

The above-mentioned lifting and lowering operation of the disk tray 39 is performed in the 15th
This will be explained using figures. As shown in Figure 15 1,
Before the movable body 34 moves in the direction D, the guide pins 84 and 85 are inserted into the guide holes 80 and 81 above the guide holes 80 and 81 provided in the lifting lever 40 as a support member.
0,112, and guide pins 84,8
The disk tray 39 to which 5 is fixed is raised. When the movable body 34 is moved in the direction D by the electric drive means 35, the pin 88 of the arm 31 is guided in the elongated hole 101, so the arm 31 rotates counterclockwise around the guide rod 30, and the push rod 86 presses the end 92 of the support member 40, thereby displacing the support member 40 in the opposite direction to direction D. 15th
As shown in FIG. 2, the guide pins 84, 85 are guided below the guide holes 80, 81, 111, 113, and the disk tray 39 is lowered. Further, the above-mentioned clamp mechanism 21 is simultaneously lowered by the action of the cam surface 63 provided on the movable body 34.

In this way, move disk 1 up and down,
This can be done reliably without adversely affecting the disk, and the structure can be simplified.

Effects As described above, according to the present invention, the number of parts can be reduced and space can be saved. Further, since an electric drive means 35 is provided, it is possible to automatically raise and lower the disk tray 39 and the clamp mechanism 21, and the supporting members 40, 41 are attached to the arms 31, 3 attached to both ends of the guide rod 30.
2, the disk tray 39 moves up and down smoothly, and the clamp mechanism 21 is displaced by the cam surfaces 63 of the support members 40 and 41. Therefore, the vertical movement of the clamp mechanism 21 also becomes smooth.

Moreover, according to the present invention, it is only necessary to provide the arms 31 and 32 and configure the supporting members 40 and 41 to move forward and backward, increasing the degree of freedom in design and keeping the height of the entire device low. becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is a sectional view showing a simplified internal structure of the embodiment shown in Fig. 1, Fig. 3 is a front view of Fig. 2, and Fig. 4 is a perspective view of an embodiment of the present invention. The figure is a right side view of Fig. 2, Fig. 5 is a plan view showing a simplified view of the clamp mechanism 21 and its related configuration, Fig. 6 is a front view of Fig. 5, and Fig. 7 is a right side view of Fig. 5. A top view, FIG. 8 is a perspective view of the clamp mechanism 21,
9 is an exploded perspective view of the clamp mechanism 21 shown in FIG. 8, FIG. 10 is a plan view of FIG. 8, FIG. 11 is a side view of the clamp mechanism 21 shown in FIG. 10, and FIG. 12 is a side view of the clamp mechanism 21 shown in FIG. 13 is a sectional view of the clamp part 49, FIG. 13 is a perspective view showing the disk tray 39 and related components, FIG. 14 is an exploded perspective view of FIG. 13, and FIG. 16 is a simplified front view illustrating the lifting and lowering operation of the clamp mechanism 21, and FIG. 17 is a perspective view of a part of the prior art. 1...Disc, 31, 32...Arm, 34
...Mobile object, 39...Disk tray, 40,4
1...Lever for lifting and lowering the disk tray, 63...Cam, 100...Protrusion.

Claims (1)

[Scope of utility model registration request] A moving body 34 having a cam surface 63 and the moving body 3
4; arms 31, 32 attached to both ends of a guide rod 30 which is attached to one end of the moving body 34 and rotates according to the displacement of the moving body 34; a support member 40 that is provided so as to be able to move forward and backward in response to the rotational movement of 32;
41, and guide holes 80, 81, 80a, 81 provided in the support members 40, 41 and continuous from above to below.
a, and the supporting members 40, 41 supported by the guide holes.
The disk tray 39 is raised and lowered by the displacement of
and a clamp mechanism 21 that comes into contact with the cam surface 63 of the movable body 34 and is raised and lowered by the displacement of the movable body 34.
A disk elevating mechanism characterized by comprising: