JPH0648613Y2 - Height positioning device for loading unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a multi-disc player capable of arbitrarily selecting and playing a plurality of discs vertically stacked in a magazine. The present invention relates to a height positioning device for a loading unit for loading.

(Prior Art) FIG. 25 is a side view showing a loading operation in a conventional multi-disc player.

Side plates 132 and 133 provided on the left and right of the magazine 131
, Vertical vertical holes 132a, 133a are provided, and horizontal lateral holes 134a, 135a and stepped inclined holes 134b, 135b are provided in the left and right slide plates 134, 135 arranged on the left and right outer sides of the side plates 132, 133, respectively. , The horizontal shaft 136 provided on the side plates 132 and 133 is provided with horizontal holes 134a and 135a.
The horizontal shaft 138 on the left and right sides of the loading chassis 137 located between the side plates 132 and 133 is engaged with both the vertical holes 132a and 133a and the stepped inclined holes 134b and 135b, and is inserted into the magazine 131. A loading unit 140 for taking out the mounted disks 139 onto the loading chassis 137 is provided on the loading chassis 137, and a pinion is engaged with, for example, a rack provided on the slide plates 134 and 135, and the pinion is rotated to form a horizontal hole. 134a and 135a are guided by the horizontal axis 136 to move the slide plates 134 and 135 forward and backward (left and right in FIG. 24), and this movement of the slide plates 134 and 135 guides them to the stepped inclined holes 134b and 135b and the vertical holes 132a and 133a. Horizontal axis 138
Has a structure in which the loading chassis 137 is moved up and down so as to match the tray storage stages in the magazine 131, and the disc 139 on the loading chassis 137 is transferred to the turntable 140 at the lowest position.

The reason why the stepped inclined holes 134b and 135b are used instead of the mere inclined holes is that even if there is some deviation in the stop position control of the slide plates 134 and 135, there is no deviation in the height positioning of the loading chassis 137. This is because.

(Problems to be solved by the invention) In the above-mentioned conventional one, since the loading chassis 137 moves up and down along the stepped inclined holes 134b and 135b, it is not continuous, and the loading unit 140 operates intermittently. Is not smooth.

Further, since the step-like engaging slanted holes 134b and 135b include horizontal portions, the slide plates 134 and 13b are different from those in the case where they are simply slanted holes.
The stroke and operation time of 5 become long, and the device becomes large.

This invention has been proposed in order to eliminate the drawbacks of the conventional one, and the inclined hole can be used by devising so that the stop position control of the slide plate can be accurately performed, and the operation of the device can be performed quickly and , For the purpose of downsizing.

(Means for Solving the Problem) A height positioning device for a loading unit according to the present invention includes a magazine detachably attached to a chassis, in which a plurality of discs mounted on a disc tray are vertically stacked, and arbitrarily selected. In a multi-disc player for loading a loaded disc onto a turntable, a loading unit having a tray moving mechanism for loading / unloading a disc tray between a magazine and a vertically movable loading chassis, and a clamp arm for clamping the disc on the turntable. Is provided in the loading chassis, and a pair of left and right slide plates having vertical tilt holes are provided so as to be movable back and forth with respect to the chassis. The gear that meshes with A height position control unit for driving the loading unit to each height position of the tray loading / unloading position, the playing position, and the magazine attaching / detaching position is provided in the gear corresponding to each position. The height positioning device of the loading unit is configured to stop the lift motor by an optical sensor that detects the slit and a switch that is provided to detect the rotation direction of the gear.

(Operation) When the gears are driven by the lift motor, the left and right slide plates that are integrated with the rack move forward or backward, and the loading chassis with the horizontal axis engaged with the slanted holes moves to the tray loading / unloading position and playing position. , At the magazine attachment / detachment position,
Lift operation is performed in a predetermined manner.

At each of the above positions, an optical sensor detects a slit provided in a large-diameter gear corresponding to these positions, whereby the lift motor is stopped.

The slits provided in the large-diameter gear allow the intervals between the positions to be sufficiently large, so that the lift motor stop position does not vary and the loading unit height position control is accurate. .

As a result, the slide plate has a sufficient number of sloping holes, the stroke of the slide plate is shortened, and quick operation and downsizing of the apparatus can be achieved.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are overall plan views in respective operating positions, FIGS. 3 and 4 are left and right side views of essential parts of FIG. 1, and FIG. 5 is FIG. FIG. 6 is a front view of the main part of FIG. 1, and FIG. 6 is a rear view of the main part of FIG.

The left and right sub-chassis 1 and 2 that are substantially U-shaped in front view, and the rear sub-chassis 3 and the left and right sub-chassis 1 and 2 that are joined and screwed to the rear ends (right side in FIG. A box-shaped chassis 5 is constituted by a magazine holder 4 having a front view shape, which is fitted into the front portion (left side in FIG. 1) and screwed.

The magazine holder 4 is capable of stacking a plurality of disc trays 6 vertically (in the illustrated example, six disc trays are provided, and the left and right guides 7, 7 are provided).
6 mounting stages are formed by each of the disc trays 6
Is slidable back and forth) Magazine 8
Removably hold along 9,9.

The holder upper plate 10 is screwed to the upper portions of the left and right side plates of the magazine holder 4, and a magazine lock mechanism 11 and a magazine discharge mechanism 12 described later are assembled to the holder upper plate 10.

A rear bottom plate 13 is attached to the lower part on the rear side (right side in FIG. 1) of the chassis 5 with screws 14, and a turntable motor M ₁ having a turntable 15 and an optical pickup 17 are provided.
Pickup feed motor M ₄ , optical pickup feed mechanism 18
(For example, a pinion rack is mainly used) and left and right reference pins 64 and 65 are attached to the upper surface of the rear bottom plate 13.

On the left and right sides of the loading chassis 19, upper horizontal axis 20 and lower horizontal axis 21 are provided in front and back and left and right, respectively, and the lower horizontal axis 21 is located outside the left and right subchassis 1 and 2. Engage with the horizontal holes 22a, 23a (horizontal) of the left and right slide plates 22, 23,
The upper horizontal axis 20 is the vertical holes 1b and 2b (vertical) of the left and right subchassis 1 and 2 and the inclined holes 22b and 23b of the left and right slide plates 22 and 23.
It is positioned above the rear bottom plate 13 by engaging with both (inclined with respect to the horizontal and having horizontal portions 22d and 23d at the lowest position).

The loading chassis 19 includes an upper plate 24, a lower plate 25, and U-shaped guides 26, 26 provided on the left and right side portions between them.

A tray moving mechanism having a function of pulling out the disc tray 6 having the disc 27 from the magazine 8 and inserting it into the guides 26, 26 of the loading chassis 19 or inserting the disc tray 6 pulled out from the guides 26, 26 into the magazine 8.
28 and the height at which the disc tray 6 is pulled out or inserted (the tray loading / unloading position), the loading chassis 19 descends and the disc 27 reaches the height position (playing position) on which the turntable 15 is placed. A loading unit 30 including a clamp mechanism 29 for clamping the disk 27 to the 15 is attached to the loading chassis 19.

The up and down movement of the loading chassis 19 is performed by the slide plates 22 and 23.
Is guided by the lower horizontal shafts 21 and 21 to move forward or backward, and the lift drive mechanism 31 for moving the slide plates 22 and 23 back and forth is attached to the lower front side of the chassis 5 with screws 32. Attached to the upper surface of the front bottom plate 33.

The front bottom plate 33 and the rear bottom plate 13 are the lower parts of the chassis 5,
At the same time as closing, the framework of the chassis 5 is reinforced.

Next, the structure of each of the above mechanisms such as the lift drive mechanism 31 will be described.

The lift drive mechanism 31 is shown in a perspective view in FIG.

The illustrated lift drive mechanism 31, the semi-disc-shaped large-diameter gear 35 that always meshes with the racks 34 respectively attached to the lower portions of the slide plates 22 and 23, pivotally supports the front bottom plate 33 with the shaft 36, A pinion 37 that meshes with the carrier 35, a worm 38, a worm wheel 39, and
It is driven by a lift motor M ₂ via a belt transmission mechanism 40.

When the gear 35 is rotated, for example, in the direction of the arrow in FIGS. 1 and 7, the slide plate 22 moves backward (to the right in FIGS. 1 and 3) and the slide plate 23 moves to the front (see FIG. 1, In FIG. 4, the loading chassis 19 rises by moving left).

When the horizontal axis 20 is located at the entrance of the horizontal portions 22d, 23d of the inclined holes 22b, 23b, it is at the playing position (FIGS. 1, 3, and 4), and is located at the back of the horizontal portions 22d, 23d. When it is located, it is the magazine detachable position (Fig. 2).

A height position control unit 42 for controlling the loading chassis 19 to the respective height positions of the tray loading / unloading position and the playing position (magazine mounting / demounting position) will be exemplified and described.

That is, the fan-shaped shutter 44 having the slits l ₁ , ... L ₆ , H, E corresponding to the above-mentioned positions and the cam 43 is attached to the gear 35,
An optical sensor PH ₁ that detects the presence or absence of slits ₁ , ..., And a cam 4
The third small-diameter portion 43a is turned off, for example, and the optical sensor PH ₁ is formed in a range capable of detecting the slits l _{1 to} l ₆ .

In the large-diameter portion 43b, a switch S ₁ (for example, a micro type) that is turned on, an input key K for manually inputting an operation to each of the above positions, and a control unit including a microcomputer
CPu (see FIG. 8).

When the power switch P is turned on and the input key K instructs, for example, the performance of the disc 27 of the second stage, the gear 35 stopped at the performance position (FIG. 1) as an initial position and the lift motor.
Since the switch S ₁ is off due to the small diameter portion 43a, M ₂ rotates upward in the direction of the arrow, and the above-mentioned movement of the slide plates 22 and 23 causes the loading chassis 19 to move upward.

The switch S ₁ is turned on after entering the large diameter portion 43b, and the number of slits l ₁ , l ₂ , ... After that is counted by the control unit CPu,
When the second counting is performed, that is, the optical sensor PH ₁
When the slit l ₂ is detected by the controller CPu, the lift motor M ₂ is stopped and the loading chassis 19
The guide 26 has a height substantially the same as that of the second stage of the magazine 8.

The tray moving mechanism 28 is at the tray insertion position, and the disk take-out position storage device 45, which will be described later, stores this second take-out position.

When the lift motor M ₂ stops, the movement motor M ₃ of the tray movement mechanism 28 starts to rotate in the pull-out direction according to a command from the control unit CPu, and the second-stage disc tray 6 in the magazine 8
When the disk tray 6 reaches the position just above the turntable 15 and the loading arm 46 switches S
₂ (micro type) operates and motor M ₃ for movement stops.

In response to a command from the control unit CPu, the lift motor M ₂ rotates in the descending direction to rotate the gear 43 in the direction of the arrow, and the slide plate 2
With the movement of 2,23, the loading chassis 19 moves downward,
When the switch S ₁ switches the large diameter portion 43b from on to the small diameter portion 43a, and the optical sensor PH ₁ detects the _first slit H, the lift motor M ₂ is stopped and the loading chassis 19 is also stopped to perform. The disk 27 on the disk tray 6 is moved to the position, is transferred to the turntable 15, and is clamped by the clamp mechanism 29.

Then, the turntable motor M ₁ is rotated by a command from the control unit CPu, the recording / reproducing by the optical pickup 17 and the feeding operation by the optical pickup feeding mechanism 18 are performed, and the performance is executed.

When the performance is over, the lift motor M ₂ is instructed by the control unit CPu.
Rotates upwards and guides the loading chassis 19
The switch S ₃ (micro type) of the disk ejection position storage device 45 is actuated immediately before the position 26 becomes substantially the same height as the second stage of the magazine 8 again, so that the lift motor M ₂ is in a so-called stop standby state, and immediately after that the slit When the optical sensor PH ₁ detects l ₂ , the lift motor M ₂ stops.

In response to a command from the control unit CPu, the moving motor M ₃ rotates in the insertion direction, the disc tray 6 starts to be inserted toward the second stage in the magazine 6, and the loading arm is placed at the position where the insertion is completed.
The switch S ₄ (micro type) is operated by 46, and the moving motor M ₃ is stopped.

If there is a disc 27 on the disc tray 6 taken out from the magazine 6 onto the loading chassis 19, the rear bottom plate 13
The optical sensor PH ₂ attached to the disc tray 6 has a hole 6 in the disc tray 6.
It is turned on by the light reflected by the disk 27 through e.

An example of the tray moving mechanism 28 is shown in a perspective view in FIG.

On the upper plate 24 of the loading chassis 19, a loading arm 46 pivotally supported by a fulcrum shaft 51 has a gear portion 52 and an arc hole.
53 and the front and rear switch pieces 54, 55 are formed, and the slider is attached to the pin 56 attached to the rotating tip of the loading arm 46.
The groove 57a of 57 is movably engaged in the left-right direction, and the lower part of the slider 57 is inserted into the long hole 24a provided in the front-back direction in the upper plate 24 as shown in FIG. 10 taken along the line AA in FIG. The upper plate 24 is sandwiched between the upper piece 57b and the lower piece 57c of the slider 57 from above and below, and the balls 58, 58 mounted on the slider 57 form the long holes 24a.
The structure is in sliding contact with.

The hooks 59 formed on the slider 57 are housed in the respective hook holes 8a and 6a of the magazine 8 and the disc tray 6 inserted into the magazine holder 4 at the tray storage position shown in FIG. When moving up and down, the hook 59 also moves up and down without coming into contact with the hook holes 8a, 6a, and when the loading chassis 19 is at substantially the same height in the selected one of the above stages of the magazine 4, the hook 59 Engages with the hook hole 6a of the disc tray 6 on the step and slides 57
The disk tray 6 is pulled out or inserted by moving the disk tray 6 back and forth, and the loading chassis 19 moves to the lowest magazine attachment / detachment position (slit E to the optical sensor PH ₁
2) at which the hook 59 is detected), the hook 59 is located below the hook hole 8a on the bottom side of the magazine 8 so that the hook 59 does not interfere with the attachment / detachment of the magazine 8.

The loading arm 46 reciprocally rotates between a tray storage position where the switch piece 54 operates the front side switch S ₄ and a tray pull-out position where the switch piece 55 operates the rear side switch S ₂ .

The reciprocating operation of the loading arm 46 is performed by the moving motor M _{3 in} which the pinion 60 meshing with the gear portion 52 is attached to the upper plate 24, the belt transmission mechanism 61, and the gear transmission mechanism 62 (all are pivotally supported by the upper plate 24). The guide pin 63 mounted on the upper plate 24 by being driven by means of the circular arc hole 53 engaging with the guide pin 63 facilitates the reciprocating motion of the loading arm 46.

Disc tray 8 and disc ejected from magazine 6
After playing, 27 is returned to the guide 7 in the original stage of the magazine 6, so that the control unit CPu counts and stores the number of detections of the slits l _{1 to} l ₆ of the shutter 43 at this disc take-out position. Gear only this memory value prior to insertion into 6
Although it is possible to configure the disk ejection position storage device so as to control the rotation of 35, even if the power switch P is turned off during the performance or the loading operation and the auxiliary power supply for the memory is provided, a long time elapses. Then, when the extraction position memory disappears, the electric storage device cannot handle it.

A side view of respective operating positions of the mechanically-configured disk ejection position storage device 45 for solving such a problem is shown in FIG.
Figures 11, 13 and 14 are plan views and Figures 12 and 15 are plan views.
Each showed.

Guide pieces 71a of the engaging piece 71 of the engaging step C ₁ -C ₆ equal to the number of stages of the magazine 8 is provided in the vertical direction, the 71a, the longitudinal pin 72 attached to the left and right sub-chassis 2, loosely fitted, engage The inner guide piece 71b and the outer guide piece 71c of the piece 71 are brought into contact with the inner side surface and the outer side surface of the left and right sub-chassis 2, respectively, and
The connecting portion of the inner guide piece 71b and the outer guide piece 71c is penetrated into the hole 2a, and a spring 73 stretched between the engaging piece 71 and the left and right sub-chassis 2 causes the upper end of the hole 2a to hit the connecting portion. The engaging piece 71 is locked at the upper position (FIGS. 11 and 13), and the switch S ₃ attached to the left and right sub-chassis 2 is turned on at the uppermost engaging piece 71.

An intermediate portion of the detection piece 74 formed with the engaging portion 74a and the pushing portion 74b at the front and rear is rotatably supported by the vertical pin 75 to the upper plate 24, and the stopper 76 and the detecting piece protruding from the upper plate 24 are provided. A coil spring 77, both ends of which are locked to 74, biases the detection piece 74 in a direction in which the pushing portion 74b approaches the elongated hole 24a, and the stopper 76 contacts the detection piece 74 (see FIG. In Fig. 15), the pushing portion 74b is the slider 57.
Of the engaging portion 74a and the slider 57 so that a part of the engaging portion 74a overlaps with the engaging steps C _{1 to} C ₆ in plan view.
When is moved to the tray storage position, the pushing portion 74b is pushed by the slider 57, and the detection piece 74 is rotated against the winding spring 77 to a position where the above-mentioned overlapping of the engaging portion 74a disappears.

Therefore, for example, when the loading chassis 19 is located in the second stage of the magazine 8 and the loading arm 46 is in the tray storage position, the engagement portion 74a of the detection piece 74 causes the engagement portion 74a of the detection piece 74 to engage with the second stage of the engagement piece 71. It does not engage with C ₂ but faces it.

Next, the loading arm 46 rotates rearward to start pulling out the second-stage disc tray 6, and the slider 57 pushes the pushing portion 74.
When it is separated from b, the detection piece 74 is rotated and the engaging portion 74a is engaged.
Engage C ₂ .

The disc tray 6 is completely transferred to the loading chassis 19, the loading chassis 19 reaches the playing position by the operation of the lift driving mechanism 31 (FIG. 14), and the loading chassis 19 is lifted when the playing is finished.

The engaging piece 71 engaged with the detecting piece 74 also moves upward together, and the engaging piece 71 operates the switch S ₃ immediately before the loading chassis 19 becomes substantially level with the second stage of the magazine 8. Thirteenth
Immediately after that, the optical sensor PH ₁ detects the slit l _2, and the lift motor M ₂ is stopped by a command from the control unit CPu, and the guide 26 of the loading chassis 19 is at substantially the same height as the second stage of the magazine 8. Stop and stop.

The loading arm 46 rotates forward and the hook 59 inserts the disc tray 6 into the second stage of the magazine 8,
57 pushes the pushing portion 74b, the detection piece 74 rotates left in FIG. 15 and disengages from the engagement stage C ₂ , and the loading chassis 19 returns to the playing position and stands by.

In this way, since the disk ejecting position is stored by the mechanical part including the detecting piece 74, the engaging piece 71, and the switch S ₃ , even if the power is turned off during the performance, etc., the original The disc tray 6 can be correctly inserted into the take-out stage.

A magazine lock mechanism 11 for locking the magazine 8 on the magazine holder 4 and a magazine ejection mechanism 12 for ejecting the magazine 8 from the magazine holder 4 are shown in a perspective view in FIG.

The lock claw 81, the operating portion 82, the switch piece 83, and the engaging groove on the upper surface.
The lock arm 85 provided with 84 is pivotally supported on the upper surface of the holder upper plate 10 by a fulcrum pin 86, and the spring 88 stretched between the holder upper plate 10 and the hook 87 causes the lock arm 85 to move. In FIG. 1 and FIG. 2, the lock claw 81 is biased counterclockwise so that the lock claw 81 looks inward from the left side plate 4a of the magazine holder 4 and the operating portion 82.
Should look out from the left and right subchassis 1.

A lock arm side portion 90 having a lower surface provided with an engaging pin 89, a detection arm 94 having a cam arm 92 having a cam groove 91 provided on the lower surface, and a guide hole 93 are attached to the upper surface of the holder upper plate 10 by a fulcrum pin 95. And engage the engaging pin 89 with the engaging groove 84 of the lock arm 85.
The guide hole 93 to the pin 96 provided on the upper plate 10 of the holder.
Engage.

The cam groove 91 engages with the cam pin 98 of the ejecting slider 97 of the magazine ejecting mechanism 12, which will be described later, and due to this engaging action, the lock pawl 81 as shown in FIG. 2 when the magazine 8 is not inserted.
Will protrude inward from the left side plate 4a of the magazine holder 4 in a predetermined manner.

In order to release the lock by rotating the lock arm 85 in the protruding and locked position against the spring 88, the left slide plate 22
At the top of the, push-in portion 22c that protrudes inward and is trapezoidal in plan view
Is provided, and the magazine lock mechanism 11 mainly including the lock arm 85 and the detection arm 94 is configured.

The ejection slider 97 is attached to the long holes 10a and 10b of the holder upper plate 10 by
By engaging the guide portions 97a, 97b of the shape, the holders can be slid back and forth along the elongated holes 10a, 10b just below the holder upper plate 10, and at the time of insertion or ejection, the front end of the magazine 8 (disc tray insertion / ejection An abutting piece 97c that abuts against the end) is projected on the lower surface, and is constantly urged forward by the discharging spring 99,
The rack 100 provided at the side end is provided with a damper 101 for cushioning the discharging operation.
Meshes with the pinion 102.

A switch S ₅ (micro type), which is operated by being pushed by the switch piece 83 of the lock arm 85 in a state where the magazine 8 is not attached, is attached to the holder upper plate 10.

Therefore, in the state shown in FIG. 2 in which the magazine 8 is not attached to the magazine holder 4, the ejection slider 97 is at the frontmost position (the guide portion 97a is in contact with the front end edge of the elongated hole 10a), and the cam pin
Reference numeral 98 is within the range of the inlet portion 91a of the cam groove 91, and the cam arm 9
2 is the farthest position from the pin 96, the engagement pin 89 is the position where the lock arm 85 is rotated most clockwise, and the lock claw 81 is a position slightly protruding inward from the left side plate 4a of the magazine holder 4 ( Therefore, the switch piece 83 is kept in a position (not in contact with the left side surface 8b of the magazine 8 to be inserted or withdrawn), and the switch piece 83 pushes the operator of the switch S ₅ to turn it on.

When the magazine 8 is inserted, the front end of the magazine 8 hits the contact piece 97c of the ejection slider 97 and pushes the ejection slider 97 rearward.

When the cam pin 98 also moves backward and approaches the end of the entrance 91a of the cam groove 91, the front end of the magazine 8 passes through the inside of the lock pawl 81 and locks when the cam pin 98 enters the inner part 91b of the cam groove 91. The engagement groove 84 of the arm 85 reaches a position where the detection arm 94 can be slightly separated from the engagement pin 89 of the detection arm 94,
As a result, the lock arm 85 is free from the detection arm 94, and the lock arm 85 is slightly rotated leftward by the spring 88 so that the lock claw 81 contacts the left side surface 8b of the magazine 8.

When the insertion completion position is reached, the lock hole on the left side of the magazine 8
The lock claw 81 is fitted into and engaged with 8c (the perspective view of the main part of the magazine 8 is shown in FIG. 17), the magazine 8 is locked, and the switch piece 83 is separated from the operating piece of the switch S ₅ and is switched off. The discharge spring 99 is fully stretched.

The ejection key J is operated to remove the magazine 8 from the magazine holder 4.

First, if the disc tray 6 is pulled out, the tray moving mechanism 28 operates to move the disc tray 6 to the magazine 8
Return to the original stage.

Next, the lift drive mechanism 31 operates, the loading chassis 19 descends, the switch S ₁ is turned off, and when the optical sensor PH ₁ detects the second slit E, the lift drive mechanism 31 is moved.
Stops and the loading chassis 19 reaches the magazine ejection position (at the same height as the playing position).

When the lift moving mechanism 31 moves to the magazine ejection position,
The left slide plate 22 moves further forward than the playing position, the operating portion 82 of the lock arm 85 is pushed rightward inward by the pushing portion 22c, the lock arm 85 rotates clockwise, and the lock claw 81 moves to the magazine 8. It comes off from the lock hole 8c.

As a result, the magazine 8 is ejected from the magazine holder 4 by being pushed by the ejecting slider 97 urged by the ejecting spring 99, and the switch piece 83 pushes the switch S ₅ to switch it on.

Next, the lift drive mechanism 31 raises the loading chassis 19, and once the switch S ₁ is switched on to lower the loading chassis 19, and the optical sensor PH ₁ detects the first slit H, the loading chassis 19 plays. Stop in position.

On the left side of the magazine holder 4, an intermediate portion of a tray releasing arm 105 having a releasing portion 103 and an operating portion 104 is pivotally supported by a fulcrum pin 106, and a spring 107 rotates clockwise in FIGS. 2 and 16. The stopper 108 of the biased tray release arm 105 abuts the notch 1a of the left and right subchassis 1, and the operating portion 104 is held at a position slidable in the long groove 8d at the left front lower portion of the magazine 8. The releasing portion 103 is held outside the insertion locus of the left side surface 8b of the magazine 8.

The tray lock arm 110 pivotally supported by a fulcrum pin 109 on the left rear portion of the magazine 8 is urged clockwise by a spring (not shown) to have its lock claw 111 in the magazine 8 in a non-inserted state in the magazine holder 4. All of the disc trays 6 are engaged with the lock recesses 6b.

While the magazine 8 is being inserted, the operating portion 104 is in sliding contact with the long groove 8d, and the releasing portion 103 does not contact the left side surface 8b of the magazine 8. However, when the insertion completion position is reached, the operating portion 104 contacts the left side surface 8b of the magazine 8. When the vehicle moves on and turns counterclockwise, the release section 103 pushes the actuating section 112 of the lock arm 110 to turn counterclockwise, the lock claw 111 disengages from the lock recess 6b, and the disc tray 6 can be pulled out. (Fig. 1).

An example of the clamp mechanism 29 is shown in the perspective view of FIG. 18 and the side view of FIG. 19, respectively.

The clamper arm 123, which holds the disk clamper 121 with the presser spring 122, is supported by the intermediate support plate 124, the support portion 125 formed by cutting and raising the upper plate 24 of the loading chassis 19, and the support plate spring 126. The disc clamper 121 is pivotally supported so as to be able to swing up and down about the fulcrum shaft 127 (pass through the hole 24b of the upper plate 24), and the disc clamper 121 of the upper plate 24 is supported by a spring 128 stretched between the supporting portion 125 and the upper plate 24. It is held at a position (non-clamping position) where it hits the stopper 24e.

The operation screw 129 is screwed into the rear part of the clamper arm 123, and the operation piece 3a is formed on the rear sub-chassis 3.
When the loading chassis 19 is in each tray loading / unloading position, the clamper arm 123 is in the non-clamping position, and when it is lowered to the playing position, the operating screw 128 is pushed up by the operating piece 3a and the disc clamper 121 moves downward. ,
The disc 27 is clamped by the turntable 15 and the disc clamper 121.

Next, the operation will be described.

When the magazine 8 is inserted into the magazine holder 4, the magazine lock mechanism 11 operates, the lock claw 81 engages with the lock hole 8c, the magazine 8 is locked, and the tray lock release arm 105
As a result, the lock claw 111 is disengaged from the lock recess 6b, the disc tray 6 is unlocked, the ejection slider 97 is pushed rearward, the ejection spring 99 is tensioned, and the switch S ₅ is turned off.

When the power switch P is turned on, if there is a disc tray 6 that has been ejected, the disc ejection position storage device
The lift drive mechanism 31 works by 45 to align the disc tray 6 with the loading chassis 19 in the original stage of the magazine 8, and the tray moving mechanism 28 inserts the disc tray 6 in the original stage.

The lift drive mechanism 31 lowers the loading chassis 19 to stand by at the playing position (Fig. 20).

The magazine 8 of the disc 27 to be played by the input key K
When the number of stages inside is input to the control unit CPU, the lift drive mechanism 31 operates and the loading chassis 19 rises,
The number of detected slits l ₁ , l _2, ... Is counted by the optical sensor PH _{1, and} when the count number n matches the input stage number N, the loading chassis 19 is stopped.

The tray moving mechanism 28 operates and the slider 57 starts transferring the disk tray 6 to the loading chassis 19.

Slider from the detection piece 74 of the disk ejection position storage device 45
When 57 is disengaged, the engagement portion 74a engages with one of the engagement stages C _{1 to} C ₆ whose number is equal to the number of input stages n.

When the transfer is finished, the lift drive mechanism 31 is the loading chassis.
19 is lowered, the engaging piece 71 is moved downward together with the detecting piece 74, and when the optical sensor PH ₁ switches the switch S ₁ from on to off and detects the first slit H, the lift drive mechanism 31 is stopped and the loading operation is started. The chassis 19 reaches the playing position, the reference holes 6c and 6d of the disc tray 6 are fitted to the reference pins 64 and 65 (standing on the rear bottom plate 13) to support the disc tray 6,
The 27 rides on the turntable 15.

The operating screw 129 is the operating piece 3 just before stopping at this playing position.
The disc clamper 121 is pushed up by a and starts descending, and the disc 27 is pressed and clamped to the turntable 15 at the playing position.

If the disc 27 is not placed in the disc tray 6 in the stage designated by the input key, when the disc tray 6 is almost transferred to the loading chassis 19, the disc tray 6 below The incident light of the optical sensor PH ₂ simply passes through the hole 6e of the disc tray 6 and the reflected light does not enter the optical sensor PH _2, and the disc tray 6 is returned to the original stage of the magazine 8 according to a command from the control unit CPU. , Next, lower the loading chassis 19 to the playing position and wait (
(Fig. 21, Fig. 22).

At the end of clamping, the turntable motor M ₁ and pickup feed motor M ₄ are driven by the command from the control unit CPU.
The performance begins.

When the performance is over, the device stops and waits for the next command.

FIG. 22 shows the flow and FIG. 24 shows the flow when the next performance of the disc 27 is instructed after the performance is finished.

When a new step number (for example, the second step) is instructed by the input key K, the loading chassis 19 moves up (from the previous playing position), the detection piece 74 also moves up, and switches immediately before the original step is matched. the S ₃ is turned on, slit l ₁ to l ₆ immediately after the
When one of the above is detected by the optical sensor PH ₁ , the lift motor M ₂ is stopped.

The tray moving mechanism 28 operates to insert the disc tray 6 back into the magazine 8, for example, in the third stage, and the moving motor M ₃ stops.

The control unit CPU compares the previous input stage number N with the new input stage number N, and if the new input stage number N is smaller, the loading chassis 19 descends, and conversely, the new input stage number N is larger. The rotation direction of the lift motor M ₂ is controlled so as to rise.

When the loading chassis 19 starts to move up and down, as described above, the slits l ₁ , l ₂ , ... Are counted by the optical sensor PH ₁ , the loading chassis 19 is stopped at a predetermined height, the disc tray 6 is ejected, and the disc is ejected. The position is stored, the performance position is lowered, and the performance operation is performed.

The flow of ejecting the magazine 8 (when the disc tray 6 is present on the loading chassis 19) is shown in FIG.

When the eject key J is operated, the disk ejection position storage device
The action of 45 causes the disc tray 6 on the loading chassis 19 to be inserted back into the original stage of the magazine 8, and the above-described series of operations is performed. Then, the lift motor M ₂ is lowered and the slide plates 22 and 23 are played. When the optical sensor PH ₁ detects the second slit E after passing through the position to the discharge position, the drive mechanism 31 stops.

When the pushing portion 22c of the slide plate 22 pushes the operating portion 82 of the lock arm 85 inward with the movement to the ejection position and disengages from the lock pawl 81 lock hole 8c, the magazine 8 is ejected by the restoring force of the ejection spring 99. The tray lock arm 110, which is pushed by the slider 97 and ejected from the magazine holder 4 and disengaged from the tray lock release arm 105, locks the disc tray 6 in the magazine 8.

When the lock arm 85 is returned to rotate the switch S ₅ is turned on to rotate the motor M ₂ one sputum upward lift, turn on a little higher position than the playing position, the lift by the ON operation of the switch S ₁ The motor M ₂ reverses in the descending direction, stops the _first slit H at the playing position detected by the optical sensor PH ₁ , and the loading chassis 19 also waits at this position.

If there is no disc tray 6 on the loading chassis 19, there is no process for returning and inserting the disc tray 6. Therefore, the loading chassis 19 located at the playing position does not move at all, and the lock is immediately released when the gear 35 slightly rotates. The operation takes place and the magazine ejection is very fast.

(Advantages of the Invention) As described above, the height positioning device for a loading unit according to the present invention has a large diameter in which the front and rear movements of the left and right slide plates for raising and lowering the loading chassis are meshed with the rack of the slide plates. The gear is driven by the lift motor, and the stop position control of the inter-lift motor is performed by the optical sensor detecting slits provided in the gear corresponding to the respective stop positions such as the tray loading / unloading position. Since the gears have a large diameter, the slits can be arranged at a sufficiently wide interval because of the above-mentioned configuration, so that the stop position of the loading chassis does not occur.

As a result, it suffices to provide a mere inclined hole in the slide plate for the lift operation, and the height position control of the loading chassis becomes accurate even if it is not the above-mentioned conventional stepped inclined hole. The stroke of the slide plate became shorter because the horizontal component was lost. This reduced the operating time of the device and made the device itself compact.

In addition, since there is no ascending / descending as in the case of a stepped inclined hole, the lift operation is continuous and smooth, and no undue force is applied to each member.

[Brief description of drawings]

1 to 24 show an embodiment of the present invention.
Figures and 2 are plan views of the main parts of the multi-disc player.
3 and 4 are a left side view and a right side view of FIG. 1, respectively, and FIGS. 5 and 6 are a front view of a main part and a rear view of the main part of FIG. 1, respectively.
7 is a perspective view of the lift drive mechanism, FIG. 8 is a control circuit diagram, FIG. 9 is a perspective view of the tray moving mechanism, FIG. 10 is a cross-sectional view taken along the line AA of FIG. 9, FIG. 11, and FIG. , Fig. 14 is a side view of the respective operating states of the disk ejecting position storage device, Fig. 12 is a plan view of Fig. 11, Fig. 15 is a plan view of Fig. 14, and Fig. 16 is a perspective view of a magazine locking mechanism. Figures and 17 are perspective views of the waist of the magazine, Figure 18 is a perspective view of the clamp mechanism, Figure 19 is a side view of Figure 18, and Figures 20, 21, 21, 22 and 23 are flowcharts. FIG. 24 is a timing chart and FIG. 25 is an explanatory diagram of a conventional device. 1,2 …… Left and right subchassis, 1a …… Notch hole, 1b, 2b …… Vertical hole, 2a, 6e, 24b …… Hole, 3 …… Rear subchassis, 3a ……
Actuator, 4 …… Magazine holder, 4a …… Left side plate, 5 ……
Chassis, 6 ... Disc tray, 6a, 8a ... Hook hole, 6b ... Lock recess, 6c, 6d ... Reference hole, 7 ... Guide, 8 ... Magazine, 8b ... Left side, 8c ... Lock Hole,
8d: long groove, 9: protrusion, 10: holder upper plate, 10a, 10b,
24a: long hole, 11: magazine locking mechanism, 12: magazine ejection mechanism, 13: rear bottom plate, 14,32 ... screws, 15 ...
… Turntable, 17 …… Optical pickup, 18 …… Optical pickup feeding mechanism, 19 …… Loading chassis, 2
0,21 …… Horizontal axis, 22,23 …… Slide plate, 22a, 23a …… Horizontal hole, 22b, 23b …… Inclined hole, 22c, 74b …… Pushing part, 22d, 23d
…… Horizontal part, 24 …… Upper plate, 25 …… Lower plate, 26 …… Guide,
27 …… Disk, 28 …… Tray moving mechanism, 29 …… Clamping mechanism, 30 …… Loading unit, 31 …… Lift drive mechanism, 33 …… Front bottom plate, 34,100 …… Rack, 35,45…
… Gear, 36 …… axis, 37,60,102 …… pinion, 38 …… worm, 39 …… worm wheel, 40,61 …… belt transmission mechanism, 42 …… height position control section, 43 …… cam, 43a ...... Small diameter part, 43b ...... Large diameter part, 44 ...... Shutter, 45 ...... Disc ejection position storage device, 46 ...... Loading arm, 5
1,127 …… fulcrum shaft, 52 …… gear, 53 …… arc hole, 54,5
5,83 …… Switch piece, 56,96 …… pin, 57 …… slider, 57a …… groove, 57b …… upper piece, 57c …… lower piece, 58 …… ball, 59,87 …… hook, 62 ...... Gear transmission mechanism, 63 ……
Guide pins, 64, 65 ... Reference pins, 71 ... Engaging pieces, 71a ...
… Guide piece, 71b …… Inner guide piece, 71c …… Outer guide piece, 72,75 …… Vertical pin, 73,88,107,128 …… Spring, 74 ……
Detection piece, 74a ... Engaging portion, 76, 108 ... Stopper, 77 ...
Winding spring, 81,111 …… Lock claw, 82,104 …… Actuating part, 84
...... Engagement groove, 85 …… Lock arm, 86,95,106,109 ……
Support pin, 87 …… hook, 89 …… engagement pin, 90 …… lock arm side, 91 …… cam groove, 91a …… entrance, 91b ……
Inner part, 92 ... Cam arm, 93 ... Guide hole, 94 ... Detecting arm, 97 ... Discharging slider, 97a, 97b ... Guide part, 97c ... Abutting piece, 98 ... Cam pin, 99 ... Discharge spring, 101 …… Discharge damper, 103 …… Release part, 105 …… Tray release arm, 110 …… Tray lock arm, 121 ……
Disc clamper, 122 …… Pressing spring, 123 …… Clamper arm, 124 …… Supporting plate, 125 …… Supporting part, 126 …… Supporting leaf spring, 129 …… Operating screw, M ₁ …… Turntable motor, M ₂ …… Lift motor, M ₃ …… Movement motor,
M ₄ ...... Pickup feed motor, S ₁ , S ₂ ,, S ₃ ,, S ₄ ,, S ₅ ...... Switch, C ₁ , C ₂ ...... Engagement stage, PH ₁ , PH ₂ ...... Optical sensor, l ₁ , l
₂ ,… l ₆ , H, E …… Slit, P …… Power switch, K…
… Input key, J… Eject key, CPU… Control unit,

Claims (1)

[Scope of utility model registration request] 1. A magazine, which is detachably attached to a chassis, has a plurality of discs mounted on a disc tray, which are vertically arranged.
In a multi-disc player that loads arbitrarily selected discs on the turntable, a tray moving mechanism that inserts and removes the disc tray between the magazine and the vertically movable loading chassis, and clamps the disc to the turntable. A loading unit having a clamp arm is provided on the loading chassis, and a pair of left and right slide plates having vertical sloping holes are provided so as to be movable back and forth with respect to the chassis. The left and right horizontal axes of the loading chassis are associated with the sloping holes. A height position control unit that controls the loading unit to each tray loading / unloading position, playing position, and magazine loading / unloading position by driving a gear that meshes with the rack of the slide plate with a lift motor. Are attached to the gears corresponding to the above positions. A height positioning device for a loading unit, characterized in that the lift motor is stopped by an optical sensor for detecting a slit formed therein and a switch provided for detecting a rotating direction of a gear.