JP3547487B2 - Disc changer device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a player for reproducing information recorded on a disc such as a laser disc and a compact disc, and more specifically, a player for selectively extracting a desired disc from a plurality of stored discs and reproducing the disc. The present invention relates to prevention of rattle noise (scratch noise generated by clearance between sliding members required for moving a mechanism) in a vehicle-mounted disc changer device.
[0002]
[Prior art]
Conventionally, a step-moving mechanism using a plate cam having a step-like cam groove basically includes a follower projection 501 implanted in a lift table and a fixed linear groove for guiding the follower projection 501, as shown in FIG. A cam groove 507 is provided in which the inclined portion 504 that presses the 502 and the protrusion 501 and the horizontal portion 505 orthogonal to the linear groove 502 are connected to the moving plate cam 506 alternately in a stepwise manner. When the plate cam 506 is moved in a direction orthogonal to the longitudinal direction of the linear groove 502, when the inclined portion 504 of the cam groove 507 comes into contact with the projection 501, the projection 501 is pushed along the linear groove 502, and the horizontal portion is moved. In 505, the projection 501 maintains a stationary state even while the plate cam 506 is moving, so that a sufficient time margin for starting and stopping the mechanism in the horizontal portion 505 can be secured.
[0003]
The conventional example shown in FIG. 5 is a stepped cam groove of a disc changer device for one magazine having six discs. In the case of a disc changer device to which a plurality of magazines can be mounted, adjacent magazines are provided with a step-like cam groove having a pattern of rising left instead of the step-like cam groove pattern of rising right. Therefore, it is preferable to connect the magazines in a zigzag shape according to the number of magazines. At this time, a second plate having an inclined groove as a switchback mechanism for connecting between the upper end of the lower step-like cam groove and the lower end of the upper step-like cam groove and transferring a projection between the two grooves. The cams should work together. In such a mechanism, it is possible to perform a step even between the switchback mechanisms.
[0004]
In order to smoothly move the projection that passes through the straight groove and the stepped cam groove as described above, the fitting relationship between the two grooves and the projection must be loosely fitted. However, the clearance required for loose fitting causes rattling due to external vibration and causes rattling noise, which is a serious obstacle particularly in a disk changer device mounted on a vehicle.
[0005]
For this reason, the conventional rattle noise prevention mechanism has a configuration as shown in FIG. That is, a hold cam groove 508 having substantially the same shape as the step-like cam groove 507 and accommodating the projection 501 is provided in parallel with the step-like cam groove 507, and when reproducing data from the disk, the leaf spring 510 is used. By pressing the end portion 509 of the plate cam 506 with the biased pressing means 511, the relative position between the stepped cam groove 507 and the hold cam groove 508 is shifted, and the gap between the inner surfaces of the two cam grooves 507 and 508 is generated. The disc selection device can be held by holding and locking the projection 501 in cooperation (see FIG. 5B).
[0006]
On the other hand, when the position of the disc selecting device is changed, the pressing force of the pressing means 510 which comes into contact with the unevenness of the end of the plate cam 506 is reduced in accordance with the movement of the plate cam 506, and the displacement between the two cam grooves 507 and 508 is changed. Thus, the projection 501 can be moved smoothly (see FIG. 5A).
[0007]
[Problems to be solved by the invention]
However, in such a conventional rattle noise prevention mechanism, the projection is supported at two points by pressing force from both sides, and the pressing means needs a force equal to or more than a reaction force against external force. In addition, the external force in the direction perpendicular to this direction is almost ineffective and extremely unstable except for relying on the frictional force on the inner surface of the cam groove.
[0008]
SUMMARY OF THE INVENTION It is an object of the present invention to improve the quality of reproduced information by suppressing the effect of clearance in a lifting mechanism of a disc selecting device during a reproducing operation, thereby suppressing generation of abnormal noise (rattle noise) due to skipping vibration. is there.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a first invention comprises a plate having at least one step-like cam, and a disc selecting device having a pin engaged with the cam, and by sliding the plate. In a disc changer device in which a desired disc is selectively taken out from a plurality of discs housed at predetermined positions by moving up and down the disc selecting device, the plate has a projection formed in a sliding direction of the plate. A control plate having teeth for clamping a pin of the disc selecting device, and actuating the control plate in conjunction with the projection to pin the pin engaged with the cam by the teeth. And a link for fixing the disk selection device .
[0010]
A second invention is characterized in that, in the device of the first invention, the disc selection device has a plurality of pins, and at least one of the pins is sandwiched by the control plate.
[0011]
Further, the apparatus of the third invention is provided with an elevating mechanism for selecting a required disk from the plurality of stored disks, reproducing the information recorded on the disks, and then moving the disk selection device capable of returning to the storage position again. In the disc changer device, a projection integrally implanted with the lift table on which the disc selection device is mounted, a linear guide groove for guiding the projection along the direction in which the disc is stored, and a wedge-shaped recess for retaining the projection. a stop plate contracture was arrayed, an elastic member for biasing the contracture stop plate toward the projection, Ri Do and a cam mechanism for switching the insertion and deletion of the biasing force of the elastic member, the lifting mechanism is stepped cam The disc selecting device is moved linearly in the vertical direction by linearly laterally moving the plate cam having the groove, and a biasing force addition / removal switching cam of the elastic member is provided in a part of the plate cam, Characterized in that a locking mechanism of the disk selecting device so as to interlock the follower said the detention stop plate cam.
[0013]
[Action]
In the apparatus according to the first and second aspects of the present invention, the control plate is actuated by the projections of the plate to pinch and fix the pins of the disc selection device, so that rattle noise does not occur at the reproduction position.
[0014]
In the apparatus according to the third aspect of the present invention, when the lift table (lift panel) on which the disk selecting device is mounted stops at a position corresponding to the storage of the disk in order to reproduce the recording of the predetermined disk, the lift panel is integrated with the lift panel. When the projections implanted on the holding member are pressed against each other by an elastic member so as to be sandwiched between the wedge-shaped recess provided on the restraining plate and the inner surface of the linear guide groove, the projection is locked at that position by a slight urging force due to the wedge action. You can have. Thus, the projection is supported at three points, the inner surface of the linear guide groove and the two slopes of the wedge-shaped recess, so that the projection can be fixed in a stable state. For this reason, the lift panel is irrelevant to the mechanical clearance for smooth movement, and the influence of the clearance is not transmitted to the disk selection device, and rattle noise can be suppressed.
[0015]
Further, in the third aspect of the present invention, the plate cam having the step-like cam groove for laterally moving the lift panel in a vertical stepwise movement is provided with a biasing force switching of an elastic member for restraining the projection in the wedge-shaped recess. The cam follower is engraved and the cam follower is interlocked with the restraining plate, so that when the lift panel moves up and down due to the lateral movement of the plate cam, the restraining plate simultaneously resists the urging force of the elastic member. Can be forcibly moved, and the projection can be released from the restraint of the wedge-shaped concave portion, so that the disk selecting device can be smoothly moved.
[0016]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Hereinafter, the same reference numerals are used for common elements in the drawings. FIG. 1 is a schematic front view of a disk changer device according to the present invention in a partial cross section. Reference numeral 10 denotes a housing, 12 denotes a chassis, 14 denotes an operation panel, and 16 denotes a magazine storage shelf, which divides three magazines into three stages. Can be stored. In the drawing, a magazine 18 is mounted on each magazine storage shelf 16. In this embodiment, for convenience, three magazines 18 capable of accommodating six disks 27 can be mounted, and a player operable with a total of 18 disks has been exemplified. However, it is obvious that the present invention is not limited to this. .
[0017]
Reference numeral 28 denotes an eject operation button, each of which corresponds to each magazine storage shelf 16, and a desired magazine can be taken out by pressing any one of them. The magazine is mounted by fully pushing the magazine into the predetermined shelf position, and at the end of the push, the magazine is automatically locked and held at that position by known means.
[0018]
FIG. 2 is a schematic plan view partially showing a cross section along the line II-II in FIG. 1, where M is a magazine storage unit, and P is a disk reproducing unit. Reference numeral 30 denotes a lift panel (elevation table) on which a disk selection device (not shown) is mounted. Three shift pins 33, 34, and 35 are integrally implanted as projections for control, and the operation panel 14 on the front side is provided. Zigzag stepped cam grooves 40a, 42a provided on the first plate cam 36a and the second plate cam 38a, and the first plate cam 36b and the second plate cam 38b on the rear side. The zigzag step-like cam grooves 40b, 40c provided at two places are separated from each other and supported by the step-like cam grooves 42b, 42c, and are guided up and down by linear guide grooves 43 shown in the chassis 12 to receive control. ing.
[0019]
The zigzag stepped cam grooves 40a, 40b, 40c provided on the first plate cams 36a, 36b are all identical in shape, and the stepped cam grooves 40b, 40c are axially symmetric with respect to the stepped cam groove 40a. It is one that is arranged upside down. The zigzag step-like cam grooves 42a, 42b, 42c provided on the second plate cams 38a, 38b are all the same in shape, and the step-like cam grooves 42b, 42c are formed with the step-like cam grooves 42a. They are arranged symmetrically inverted.
[0020]
Reference numeral 50 denotes an operation key of the disc push-out mechanism, which is connected to a drive unit (not shown) provided on the lift panel 30 by an arm 52 and moves up and down together with the lift panel 30. Due to the operation of the operation key 50 projecting leftward in the figure (two-dot chain line), the disc ejection lever 48 at the same level as the operation key 50 is rotated counterclockwise, and only the disc 27a engaged with this is rotated. Is pushed toward the disk reproducing unit P to a position indicated by a two-dot chain line in the figure, and is set on the disk reproducing unit P by a known means.
[0021]
The zigzag stepped cam grooves 40a and 42a formed in the first plate cam 36a and the second plate cam 38a will be described with reference to FIG. For convenience, the folded portion on the left side of the zigzag stepped cam groove 40a in the first plate cam 36a is defined as a peak, and the folded portion on the right side is defined as a valley. Step 66 in which the zigzag-shaped groove shifts from the valley to the peak, step 68 in which the shift only on the peak side, step 70 in which the shift from the peak to the valley, and step 72 in which only the valley side shifts Are sequentially combined. The second plate cam 38a also has the same zigzag shape, but the inclined portion 74 of the stepped cam groove 42a is provided in correspondence with the continuous steps 68, 72 on only one side of the first plate cam 36a. The transition is performed by the cooperation of the second plate cam 38a, and the zigzag shape is switched back.
[0022]
Next, the stepping movement of the lift panel 30 will be described by exemplifying the operation of the first and second plate cams 36a and 38a with respect to the shift pin 33. The other pins 34 and 35 are formed in exactly the same manner by the stepped cam grooves 40b and 42b: 40c and 42c of the first and second plate cams 36b and 38b which engage with the other pins 34, 35, and therefore the description thereof is omitted. Both plate cams intermittently reciprocate between zigzag peaks and valleys via joints 54a, 54b: 58a, 58b by actuation of electrically and / or mechanically controlled drive levers 56, 60. Let it.
[0023]
First, the lift panel 30 is in the lower end position _{m 1.} When the first plate cam 36a (hereinafter, cam 36a) is moved in the direction of arrow R and stopped at half the stroke position while the second plate cam 38a (hereinafter, cam 38a) is stopped, the shift pin 33 stops in an engaged position _{m 2} of the cam groove 40a. Moving in the direction of arrow R cam 36a to the stroke full shift pin 33 moves the engagement of the cam grooves 40a at a position m _3. During this operation, the cam groove 42a of the cam 38a is at the position 75 where no interference occurs.
[0024]
Then while stopping the cam 36a, when stopping at half stroke to move the cam 38a in the direction of arrow L, the shift pin 33 is stopped at the engaged position m ₄ of the cam groove 40a. Further is moved in the direction of the arrow L the cam 38a to the stroke full engagement position between the cam groove 40a of the shift pin 33 becomes m _5.
Now stop cams 38a, by stopping the cam 36a at half stroke, the shift pin 33 is stopped at the engaged position m ₆ of the cam grooves 40a. Then when the further movement of the cam 36a to the stroke full shift pin 33 engages the position m ₇ of the cam grooves 40a. Even during this operation, the cam groove 42a of the cam 38a is at the position 75 where no interference occurs. In this way, the shift pin 33 steps in the linear guide groove 43 in one direction. It is possible to reverse the shift pin 33 by reversing the above procedure.
[0025]
The engagement position where the lift panel 30 can be stopped corresponds to the storage shelf of the disk 27 of the lower magazine 18, the shift pin 33 is stopped at a required shelf position, and the position is set by a fixing mechanism according to the present invention described later. The lift panel 30 at the same level as the required disk 27 is commanded from the operation panel 14 to operate the operation key 50 of the disk ejection lever 48, and the lift of the disk 27 from the storage position of the disk 27 is performed by known means. Extraction, reproduction, and return to the storage position after use.
[0026]
Here, while the cam 36a is stopped, the cam 38a is moved in the direction of the arrow R and stopped at a half position of the stroke. It stops at the engagement position _{m 8} with the cam groove 40a of the shift pin 33. Further it is moved in the direction of arrow R cam 38a to the stroke full engagement of the cam groove 40a of the shift pin 33 is located on the position m _9. The engagement positions m ₇ , m ₈ , and m ₉ are spaces where there is no disk generated due to the thickness of the magazine storage frame or the magazine case. Therefore, an eject lever operable by the operation keys 50 is provided at this step position (not shown) so as to correspond to the storage step of each magazine, and the eject operation of the magazine is performed.
[0027]
The above is the operation for the magazine disc mounted in the lower tier, but the same operation is repeatedly performed on the cams 36a and 38a for the discs in the middle and lower tiers to achieve the object. Can be. The three-step positions m ₁₆ , m ₁₇ , and m ₁₈ between the middle magazine and the upper magazine are dead spaces in which no operation function members such as the operation keys 50 are provided. As an operation for switching back the direction of action, the cam 38a is controlled to move without stopping the entire stroke.
[0028]
76a and 76b are linear guides for reciprocating and moving the first plate cams 36a and 36b right and left, and 78a and 78b are linear guides for reciprocating and moving the second plate cams 38a and 38b right and left. Also engages with the stud pins 80 and 82 fixed to the chassis and slides.
[0029]
The fixing mechanism 84 of the disk selection device according to the present invention is installed between the chassis 12 and the respective plate cams 36a and 36b for the two shift pins 33 and 34, as shown in a partial cross section in FIG. The lower right portion of FIG. 1 is enlarged and shown in FIG. 4 for further detailed explanation. FIG. 4A shows a state where the disk selecting device is fixed, and FIG. 4B shows a state where the fixing is released. Reference numeral 85 denotes a restraining plate. An elongated hole 86 is formed at a position substantially aligned with the linear guide groove 43 provided in the chassis 12 at a substantially central portion. The wedge-shaped concave portions 88 are arranged in a saw-tooth shape at the same pitch as the storage interval of each disk.
[0030]
A claw 89 protruding left and right in the figure is fitted into a square groove 90 provided in the chassis 12, and the guide of the square groove 90 allows the crest 91 of the crest-shaped recess 88 to be linearly guided. It can slide in the left-right direction within a range that does not protrude into the groove 43 and substantially extends over the width of the linear guide groove 43. In the illustration of this embodiment, the slope of the slope 87 of the wedge-shaped concave portion is set to 20 °, but is not limited to this angle.
[0031]
In this embodiment, since the shift pin 33 is shared with the projection of the fixing mechanism according to the present invention for convenience, the linear guide groove 43 of the shift pin 33 is also used as the linear guide groove of this projection. They may be provided separately for convenience.
[0032]
Reference numeral 92 denotes a bell crank provided at the lower end of the plate cams 36a and 38a: 36b and 38b for interlocking the locking plate 85 with a biasing force application switching cam 93 of an elastic member, which will be described later. It is rotatable about the shaft 94 that has been set. At the end of one arm of the bell crank 92, a follower 95 of a switching cam 93 is provided, and at the other end, a long hole 96 is formed, and a pin 97 implanted in the locking plate 85 is provided. It is inserted. Further, the bell crank 92 has a lower end connected to a tension spring 98 as an elastic member for urging the wedge-shaped concave portion 88 toward the shift pin 33, and is constantly urged in a counterclockwise direction in the drawing.
[0033]
In such a configuration of the fixing mechanism included in the disk changer apparatus according to the present invention, when the shift pin 33 is in the locking position indicated by symbol m _{k (k} = 1~24) in the horizontal portion of the stepped cam groove 40a As shown in FIG. 4 (a), the cam follower 95 is opposed to the concave portion 99 of the switching cam 93, and the urging force of the spring 98 is not interrupted through the bell crank 92. As a result, the shift plate 33 is transmitted to move the locking plate 85 to the left in the drawing, and the shift pin 33 is pressed by any of the corresponding wedge-shaped concave portions 88.
[0034]
As a result, the shift pin (projection) 33 is stably and securely sandwiched between the inclined surfaces 87, 87 of the wedge-shaped recess 88 and the inner surface of the linear guide groove 43 from three directions. Therefore, the disc selecting device including the reproducing function mounted on the lift panel 30 is completely isolated from the influence of the clearance between the stepped cam grooves 40a and 42a and the shift pin 33, which causes rattle noise.
[0035]
On the other hand, when the movement of the first plate cam 36a or the second plate cam 38a is started to move the position of the lift panel 30, the cam follower 95 immediately switches the cam 93 against the urging force of the spring 98. The bell crank 92 is forced to rotate in the clockwise direction in the figure, and moves the locking plate 85 to the right in the figure via the pin 97 from the long hole 96. Therefore, the shift pin 33 is released from being caught by the wedge-shaped concave portion 88 at the time when the shift pin 33 starts moving up and down at the step portions 66, 68, 70, and 72 of the step-like cam groove 40a. That is, the retaining plate 85 is retracted to a position where the crests 91 of the wedge-shaped concave portions 88 do not look through the linear guide grooves 43 so as not to interfere with the movement of the shift pin 33 (see FIG. 4B).
[0036]
In this manner, with the movement of the plate cams 36a and 38a, the shift pin (projection) 33 moves through the locking position m _k (k = 1 to 24) of the stepped cam groove 40a while moving. Detention and release by the wedge-shaped recess 88 are repeated, but smoothness during movement is not hindered. In this embodiment, the shift pin 34 is provided with the same fixing mechanism 84, but the description is omitted because it is redundant. It goes without saying that it is desirable to similarly provide the fixing mechanism 84 for the shift pin 35.
[0037]
In the above-described embodiment, the means for raising and lowering the lift panel is a step-shaped and zigzag groove, but may be a simple step groove or an inclined groove as shown in FIG. In addition, a groove similar to the linear guide groove 43 provided in the chassis is formed in the operation panel 14, and the shift pin 33 is also extended until reaching the groove, so that the vertical position of the shift pin 33 can be changed from outside the changer device. If it can be visually recognized, it becomes an indicator for confirming the elevation position of the lift panel. In this case, the current position of the lift panel can be immediately identified by printing the number of the elevating position or the like in the groove.
[0038]
FIG. 6 shows an example of such a configuration. Reference numeral 20 denotes a sliding door that opens and closes a magazine storage chamber, and the drawing illustrates a position where the magazine storage shelf 16 is opened. Reference numeral 22 denotes an opening / closing handle of the sliding door 20, and reference numeral 24 denotes a monitoring window, which is formed in the sliding door 20 so that a confirmation indicator 26 of the selected disk position provided on the operation panel 14 can be visually recognized from the outside. In the case shown in the figure, according to the index S of the indicator 26, the mechanism indicates that the top of the magazine storage shelf 16 is at the magazine eject operation position (scale = E ₃ ).
[0039]
【The invention's effect】
As described above, in the disk changer device according to the present invention, as the rattle noise prevention mechanism, the protrusion for moving the lift panel on which the disk selection device is mounted is caught by the wedge-shaped recess, so that the disk selection device can be pressed by a small amount. The pressure can be stably and reliably supported, and even a disk changer device mounted on a vehicle can sufficiently cope with rattle noise prevention. In addition, when the lift panel is moved, the restraint of the wedge-shaped recess is released, so that the movement is performed smoothly, and power consumption for this can be reduced.
[Brief description of the drawings]
FIG. 1 is a partially sectional front view of a disk changer device according to the present invention.
FIG. 2 is a plan view of a cross section shown along the line II-II in FIG.
FIG. 3 is a front view of a plate cam applied to the embodiment of the disc changer device according to the present invention.
FIG. 4 is an explanatory view of the operation of the rattle noise prevention fixing mechanism of the disk changer device according to the present invention.
FIG. 5 is a diagram illustrating the operation of a conventional rattle noise prevention fixing mechanism.
FIG. 6 is a front view schematically showing a disc changer device according to the present invention.
[Explanation of symbols]
12 Chassis 14 Operation panel 16 Magazine storage shelf 18 Magazine 26 Indicator 27 Disk 28 Eject operation button 30 Lift panels 33, 34, 35 Shift pins 36a, 36b First plate cams 38a, 38b Second plate cams 40a, 40b, 40c Stairs Cam groove (first plate cam)
42a, 42b, 42c Stepped cam groove (second plate cam)
43 Linear guide groove 48 Disk ejection lever 50 Operation key 52 Arms 54a, 58a Joints 56, 60 Drive lever 84 Fixing mechanism 85 Locking plate 88 Wedge-shaped recess 92 Bell crank 93 Switching cam 95 Follower 96 Slot hole 97 Pin 98 Tension spring

Claims (3)

A plate having at least one stepped cam, and a disk selecting device having a pin engaged with the cam, wherein the disk selecting device is raised and lowered by sliding the plate, and is accommodated in a predetermined position. In a disc changer device that selectively takes out a required disc from a plurality of discs,
A convex portion formed on the plate in a sliding direction of the plate,
A control plate having teeth for clamping the pins of the disc selector;
A link for actuating the control plate in conjunction with the convex portion and fixing the disc selecting device by pinching the pin engaged with the cam with the teeth;
A disc changer device comprising: 2. The disc changer device according to claim 1, wherein the disc selection device has a plurality of pins, and at least one of the pins is sandwiched by the control plate. A disc changer device comprising a lifting / lowering mechanism for selecting a desired disc from a plurality of stored discs, reproducing information recorded on the discs, and moving a disc selection apparatus capable of returning to a storage position again. A projection that is implanted integrally with a lifting table equipped with, a linear guide groove that guides the projection along the storage direction of the disc, and a locking plate that has a row of wedge-shaped recesses that lock the projection. an elastic member for biasing the Kakawatomeban toward the projection, Ri Do and a cam mechanism for switching the insertion and deletion of the biasing force of the elastic member, the lifting mechanism is linearly of the plate cam having a stepped cam groove The disc selection device is moved linearly in the vertical direction by lateral movement, and a biasing force application switching cam of the elastic member is provided in a part of the plate cam, and a follower of this cam and a front Disk changer apparatus having a fixing mechanism of the disk selecting device so as to interlock the Kakawatome plate.

Images