JPH0817127A - Disc changer apparatus - Google Patents

Abstract

PURPOSE:To improve the quality of reproduced data by shutting influences of a clearance in an elevator mechanism of a disc selection device and suppressing the generation of rattle noises. CONSTITUTION:When a lift panel 30 loading a disc selection device stops at a required position to store a disc, a projection 33 planted integrally with the lift panel 30 is pressed and held by an elastic member 98 between a wedge-like recessed part 88 formed in a binding plate 85 corresponding to each storing shelf and an inner surface of a linear guide groove 43. The projection 33 is supported by three surfaces, i.e., the inner surface of the linear guide groove 43 and two inclined surfaces 87 of the wedge-like recessed part owing to a wedge action, so that the disc selection device is securely fixed in a stable state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a player for reproducing information recorded on a disc such as a laser disc or a compact disc. More specifically, a required disc is individually selected from a plurality of discs accommodated therein. The present invention relates to prevention of rattle noise (a rattling noise generated by a clearance between sliding members necessary for moving the mechanism) particularly in a vehicle-mounted disc changer device which is selectively extracted and reproduced.

[0002]

2. Description of the Related Art Conventionally, a stepping movement mechanism using a plate cam having a stepped cam groove is basically constructed as shown in FIG.
The follower protrusion 501, which is planted on the elevator, the fixed linear groove 502 for guiding the follower protrusion 501, and the protrusion 50.
The inclined portion 504 that is pressed against 1 and the horizontal portion 505 that is orthogonal to the linear groove 502 are alternately moved in a stepwise manner.
6 and a cam groove 507 continuously provided. When this plate cam 506 is moved in the direction orthogonal to the longitudinal direction of the linear groove 502, the inclined portion 504 of the cam groove 507 causes the projection 50 to move.
1, the protrusion 501 is pushed along the linear groove 502, and the protrusion 501 remains stationary even when the plate cam 506 is moving in the horizontal portion 505. It is possible to secure a sufficient time margin to start and stop the raising and lowering of.

In the conventional example shown in FIG. 5, the number of disks accommodated is 6
It is a stepped cam groove of the disc changer device for one magazine. In the case of a disc changer device in which a plurality of magazines can be mounted, a stepwise cam groove having a left-upward rising pattern is provided for adjacent magazines instead of the right-upward stepwise-shaped cam groove pattern shown in the figure. Therefore, it is preferable to continuously install the magazines in a zigzag shape according to the number of magazines accommodated. At this time, connect the lower end of the stepped cam groove to the lower end of the upper stepped cam groove,
A second plate cam provided with an inclined groove may be made to cooperate as a switchback mechanism for transferring the protrusion between the grooves.
With such a mechanism, it is possible to step even between the switchback mechanisms.

In order to facilitate the movement of the projections which are inserted through the straight grooves and the stepped cam grooves as described above, the fitting relationship between the grooves and the projections must be loose. However, the clearance required for loose fitting causes rattling due to vibration from the outside, which causes rattle noise.
In particular, this is a major obstacle in the in-vehicle disc changer device.

For this reason, the conventional rattle noise prevention mechanism has a structure as shown in FIG. That is, a hold cam groove 508 having substantially the same shape as the stepped cam groove 507 and accommodating the protrusion 501 is provided in parallel with and in contact with the stepped cam groove 507, and when the recording on the disk is reproduced, the leaf spring 510 is used. The plate cam 50 is urged by the biasing pressing means 511.
By pressing the end portion 509 of No. 6, the stepped cam groove 5
07 and the hold cam groove 508 are displaced from each other, and the projections 50 are formed by cooperation between the inner surfaces of the cam grooves 507 and 508.
The disk selection device can be held by sandwiching and locking 1 (see FIG. 5B).

On the other hand, when changing the position of the disc selecting device, the pressing force of the pressing means 510 abutting due to the unevenness of the end of the plate cam 506 is decreased as the plate cam 506 moves, so that the space between the cam grooves 507 and 508 is reduced. The position of the protrusion 501 is eliminated so that the protrusion 501 can be moved smoothly (FIG. 5).
(See (a)).

[0007]

However, in such a conventional rattle noise prevention mechanism, the projections are supported at two points by the pressing force from both side surfaces, and the pressing means oppose the external force. The reaction force requires a force equal to or more than that, and in order to suppress the external force in the direction orthogonal to the reaction force, it is almost powerless except depending on the frictional force on the inner surface of the cam groove, and is extremely unstable.

An object of the present invention is to improve the quality of reproduced information by blocking the influence of a clearance in the elevating mechanism of the disk selection device during reproduction operation to suppress the generation of abnormal noise (rattle noise) due to skipping vibration. It is to plan.

[0009]

In order to achieve the above object, the first invention comprises a plate having at least one stepped cam and a disk selecting device having a pin engaging with the cam. A disc changer device configured to move the disc selection device up and down by sliding the plate to selectively take out a desired disc from a plurality of discs accommodated at a predetermined position. A protrusion formed in the sliding direction, a control plate having teeth for holding the pin of the disk selecting device, and the control plate interlocking with the protrusion to cause the control plate to perform a holding operation on the pin. And a link.

According to a second aspect of the present invention, in the apparatus of the first aspect, the disk selection device has a plurality of pins, and at least one of the pins is sandwiched by the control plate. To do.

The apparatus of the third aspect of the invention is a lifting mechanism for selecting a desired disk from a plurality of disks housed therein, reproducing the information recorded on the disk, and then moving the disk selector capable of returning to the housed position again. In a disc changer device equipped with the above-mentioned disc selecting device, a projection integrally formed with an elevator table equipped with the disc selecting device, a linear guide groove for guiding the protrusion along the disc storage direction, and a wedge for locking the protrusion. A locking mechanism for a disk selection device, which includes a restraint plate in which a plurality of concave portions are arranged, an elastic member that biases the restraint plate toward the protrusion, and a cam mechanism that switches the biasing force of the elastic member. It is characterized by being provided.

Further, in the apparatus according to the fourth aspect of the present invention, in the third aspect of the invention, the elevating mechanism linearly moves the disk selecting device linearly in the vertical direction by linearly moving the plate cam having stepped cam grooves. The biasing force addition / removal switching cam of the elastic member is provided in a part of the plate cam, and the follower of the cam and the restraint plate are interlocked with each other.

[0013]

In the apparatus according to the first and second aspects of the present invention, since the control plate is operated by the convex portion of the plate to hold the pin of the disk selection device, rattle noise is not generated at the reproducing position.

Further, in the apparatus of the third invention, when the lift table (lift panel) equipped with the disk selecting device is stopped at a corresponding position of the storage of the disk for reproducing the recording of the predetermined disk, the lift is lifted. When the protrusions that are planted integrally with the panel are sandwiched between the wedge-shaped recesses provided in the restraint plate and the inner surface of the linear guide groove, they are pressed into contact with each other by an elastic member, and the wedge action causes them to move to that position with a slight biasing force. The protrusion can be held. As a result, the protrusion is supported at three points, that is, the inner surface of the linear guide groove and the two slopes of the wedge-shaped recess, and can be fixed in a stable state. Therefore, the lift panel has nothing to do with the mechanical clearance for smooth movement, the influence of the clearance is not transmitted to the disk selection device, and rattle noise can be suppressed.

Further, in the apparatus of the fourth aspect of the invention, in the third aspect of the invention, the plate cam having the stepwise cam groove for laterally moving the lift panel to move vertically is provided with a wedge-shaped recess. By engraving a cam for switching the biasing force of the elastic member that constrains the protrusion and linking this cam follower with the restraint plate, when the lift panel moves up and down as the plate cam moves laterally, Since the restraint plate can be forcibly moved against the biasing force of the member to release the protrusion from the restraint of the wedge-shaped recess, the disc selector can be smoothly moved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. Hereinafter, the same reference numerals are used for common components in the drawings. FIG. 1 is a schematic front view of a disc changer device according to the present invention with a partial cross section, 10 is a housing, and 12 is a housing.
Is a chassis, 14 is an operation panel, and 16 is a magazine storage shelf, which can store three magazines in three stages. In the figure, magazines 18 are mounted on the magazine storage shelves 16, respectively. In this embodiment, for convenience of explanation, six disks 27 are used.
An example of a player that can be loaded with three magazines 18 capable of accommodating a total of 18 discs and can operate a total of 18 discs is
Of course, the present invention is not limited to this.

Reference numeral 28 denotes an eject operation button, which corresponds to each magazine storage shelf 16, and a desired magazine can be taken out by pressing any one of them. The mounting of the magazine is performed by fully pushing the magazine into a predetermined shelf position as far as it will go, and at the end of the pushing, the magazine is automatically locked and held at that position by a known means.

FIG. 2 is a schematic plan view of a part of which is shown in section along the line II--II in FIG. 1, where M is a magazine housing section and P is a disk reproducing section. Reference numeral 30 is a lift panel (elevation platform) equipped with a disk selection device (not shown), from which three shift pins 33, 3 are provided as protrusions for control.
4, 35 are integrally planted, and zigzag stepped cam grooves 40a, 42a provided on the first plate cam 36a and the second plate cam 38a on the front operation panel 14 side and the first plate cam on the rear side. The plate cam 36b and the second plate cam 38b are supported by zigzag-shaped staircase-shaped cam grooves 40b, 40c: 42b, 42c which are laterally spaced from each other. It is vertically guided and controlled by a linear guide groove as shown.

The zigzag stepped cam grooves 40a, 40b, 40c provided on the first plate cams 36a, 36b have the same shape, and the stepped cam grooves 40b, 40c are the same.
Shows the stepped cam groove 40a which is arranged so as to be inverted axially symmetrically. Further, zigzag stepped cam grooves 42a, 42b, 42c provided on the second plate cams 38a, 38b.
Have the same shape, and the stepped cam grooves 42b, 4
2c is an arrangement in which the stepped cam grooves 42a are inverted in axial symmetry.

Reference numeral 50 denotes an operation key of the disc pushing mechanism, which is connected to a drive unit (not shown) installed on the lift panel 30 by an arm 52 and moves up and down together with the lift panel 30. Projection of the operation key 50 to the left in the figure (two-dot chain line)
As a result, the disc ejection lever 48, which is at the same level as the operation key 50, is rotated counterclockwise, and only the disc 27a engaged with this is directed toward the disc reproducing portion P to the position shown by the two-dot chain line in the figure. It is pushed out and set in the disc reproducing portion P by a known means.

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 the sake of convenience, the left folded portion of the zigzag stepped cam groove 40a of the first plate cam 36a is a mountain portion, and the right folded portion is a valley portion. The zigzag groove moves from the valley to the peak, step 66, only on the peak side, step 68, and from the peak to the valley, step 7.
0 and step 72 that shifts only on the valley side are sequentially combined. The second plate cam 38a also shows a similar zigzag shape, but the inclined shape portion 74 of the stepped cam groove 42a is provided corresponding to the continuous installation steps 68 and 72 on only one side of the first plate cam 36a, and in between. The transition is performed by the cooperation of the second plate cam 38a to switch back the zigzag shape.

Next, the stepwise movement of the lift panel 30 is performed by moving the first and second plate cams 36a, 38 relative to the shift pin 33.
The operation a will be described as a representative. Other pins 34, 35
The first and second plate cams 36 that also engage with the
b, 38b stepped cam grooves 40b, 42b: 40c, 4
The description is omitted because it is performed in exactly the same manner as 2c.
Both plate cams are actuated by electrically and / or mechanically controlled actuation of drive levers 56, 60 to produce a coupling 54a,
54b: The zigzag peak and valley are intermittently reciprocated via 58a and 58b.

First, it is assumed that the lift panel 30 is at the lower end position m ₁ . Second plate cam 38a (hereinafter, cam 38a)
The first plate cam 36a (hereinafter, the cam 3
6a) is moved in the direction of arrow R and stopped at the position of half the stroke, the shift pin 33 stops at the engagement position m ₂ with the cam groove 40a. When the cam 36a is moved to the full stroke in the direction of the arrow R, the shift pin 33 moves the engagement with the cam groove 40a to the position m ₃ . During this operation, the cam groove 42a of the cam 38a is in the position 75 where it does not interfere at all.

Next, with the cam 36a stopped, the cam 3
When 8a is moved in the direction of arrow L and stopped at a position half the stroke, the shift pin 33 stops at the engagement position m ₄ with the cam groove 40a. When the cam 38a is further moved in the direction of arrow L to the full stroke, the shift pin 33
The engagement position with the cam groove 40a is m ₅ . This time, the cam 38a is stopped, and the cam 36a is stopped at the position of half the stroke, so that the shift pin 33 moves to the cam groove 4
It stops at the engagement position m ₆ with 0a. Then, when the cam 36a is further moved to the full stroke, the shift pin 3
3 engages at the position m ₇ of the cam groove 40a. Even during this operation, the cam groove 42a of the cam 38a is at the position 75 where it does not interfere at all. In this way, the shift pin 33 steps in the straight guide groove 43 in one direction. The shift pin 33 can be moved backward by reversing the above procedure.

The engaging 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 desired shelf position, and a fixing mechanism according to the present invention described later. Then, the operation panel 14 is instructed to the lift panel 30 which is at the same level as the required disc 27, and the operation key 50 of the disc ejection lever 48 is operated to store the disc 27 by a known means. Extraction from the position, reproduction, and return to the storage position after use.

Here, with the cam 36a stopped, the cam 38a is moved in the direction of the arrow R and stopped at the position of half the stroke. The shift pin 33 stops at the engagement position m ₈ with the cam groove 40a. When the cam 38a is further moved in the direction of arrow R to the full stroke, the shift pin 3
The engagement of the No. 3 with the cam groove 40a is the position m ₉ . Engagement positions m ₇ , m ₈ and m ₉ are disc-free spaces created by the thickness of the magazine housing frame and magazine case. Therefore, an eject lever that can be operated by the operation key 50 is provided at this step position so as to correspond to the storage step of each magazine (not shown), and the eject operation of the magazine is performed.

Although the above is the operation for the discs of the magazines mounted in the lower stage, the cams 36a and 38 are also used for the discs of the magazines mounted in the middle and lower stages.
The object can be achieved by repeatedly performing the same operation for a. Position of three steps between middle magazine and upper magazine m ₁₆ ,
Since m ₁₇ and m ₁₈ are dead spaces in which operation function members such as the operation keys 50 are not installed, the cam 38a stops the entire stroke as an operation for switching back the direction of the zigzag action on the shift pin 33. Controlled to move without.

76a and 76b are the first plate cams 36a and
36b are linear guides for reciprocating parallel movement to the left and right, and 78a and 78b are linear guides for reciprocating parallel movement of the second plate cams 38a and 38b to the stud pins 80 and 82 fixed to the chassis. Engage and slide.

The fixing mechanism 84 of the disk selecting device according to the present invention, as shown in a partial cross-section in FIG. 2, includes two shift pins 33 and 34, which are the chassis 12 and the plate cams 36a and 36b. Is installed between
For further detailed explanation, the lower right part of FIG. 1 is enlarged and shown in FIG. FIG. 4A shows a state in which the disc selection device is fixed, and FIG. 4B shows a state in which the fixation is released.
Reference numeral 85 denotes a restraint plate, and a long hole 86 is formed at a position substantially aligned with the linear guide groove 43 provided on the chassis 12 at a substantially central portion, and one long side of the long hole 86 from the opposite slope 87. The wedge-shaped concave portions 88 are arranged in a sawtooth shape at the same pitch as the storage interval of each disk.

Further, in the retaining plate 85, claws 89 protruding leftward and rightward in the drawing are fitted and inserted into a square groove 90 provided in the chassis 12, and by the guide of the square groove 90, the peak top 91 of the wedge-shaped recess 88 is formed. Is slidable in the left-right direction within a range extending from the position not projecting into the linear guide groove 43 to substantially the groove width of the linear guide groove 43. In the illustration of this embodiment, the slope 8 of the wedge-shaped recess is shown.
Although the gradient of No. 7 is set to 20 °, it is not limited to this angle.

In this embodiment, the shift pin 3 is used for convenience.
Since 3 is also used as the protrusion of the fixing mechanism according to the present invention, the linear guide groove 43 of the shift pin 33 is also used as the linear guide groove of this protrusion, but these may be provided separately for convenience of design. Good.

Reference numeral 92 is a plate cam 36a, 38a: 36b,
A bell crank provided at the lower end of 38b for interlocking the retaining plate 85 with a biasing force addition / removal switching cam 93 of an elastic member, which will be described later, is rotatable about a shaft 94 fixed to the chassis 12. . A follower 95 of a switching cam 93 is provided at one end of the arm of the bell crank 92, and a long hole 96 is bored at the other end of the bell crank 92 to attach a pin 97 planted in a retaining plate 85. It is inserted. Further, the bell crank 92 is connected at its lower end to a tension spring 98 as an elastic member for urging the wedge-shaped recess 88 toward the shift pin 33, and is constantly urged counterclockwise in the figure.

In such a structure of the fixing mechanism included in the disc changer device according to the present invention, the shift pin 33 is designated by the symbol m at the horizontal portion of the stepped cam groove 40a.
_{When in} the locking position indicated by _k (k = 1 to 24), the cam follower 95 faces the recess 99 of the switching cam 93, as shown in FIG. The biasing force of the spring 98 is transmitted without being blocked by the bell crank 92 so as to move the retaining plate 85 leftward in the figure, and any one of the corresponding wedge-shaped recesses 8 is transmitted.
The shift pin 33 is pressed at 8.

As a result, the shift pin (projection) 33 is stably and reliably sandwiched between the opposing slopes 87, 87 of the wedge-shaped recess 88 and the inner surface of the linear guide groove 43 from three directions. For this reason, the disc selection device mounted on the lift panel 30 and having a reproducing function 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.

On the other hand, in order to move the position of the lift panel 30, the first plate cam 36a or the second plate cam 38a is moved.
As soon as the cam follower 95 starts to move, the cam follower 95 is pushed up by the convex portion 100 of the switching cam 93 against the urging force of the spring 98, so that the bell crank 92 is forced to rotate in the clockwise direction in the figure, and the long hole. The restraint plate 85 is moved to the right in the drawing from 96 via the pin 97. Therefore, the shift pin 33 has the step portion 66 of the stepped cam groove 40a,
At the time point when the ascending / descending movement is started at 68, 70, 72, the wedge-shaped recess 88 is released from the restraint. That is, the restraint plate 85 does not interfere with the movement of the shift pin 33,
The peak top 91 of the wedge-shaped recess 88 is retracted from the linear guide groove 43 to a position where it cannot be seen (see FIG. 4B).

As described above, the shift pin (protrusion) 33 moves along with the movement of the plate cams 36a and 38a, and the locking position m _k (k = 1 to 24) of the stepped cam groove 40a.
Each time it passes through, the wedge-shaped concave portion 88 is repeatedly held and released, but the smoothness during movement is not impeded. In this embodiment, the shift pin 34 also has a similar fixing mechanism 8.
4 is provided, 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.

In the above-described embodiment, the means for moving the lift panel up and down is a stepped and zigzag groove, but a simple stepped groove as shown in FIG. 5 or an inclined groove may be used. good. Further, 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 extended to reach the groove so that the vertical position of the shift pin 33 can be changed from the outside of the changer device. If it is visible, it will be an indicator for checking the lift 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 ascending / descending position on the groove.

FIG. 6 shows an example of the structure, and 2
Reference numeral 0 is a sliding door that opens and closes the magazine storage chamber, and is shown at a position where the magazine storage rack 16 is opened. 22 is an opening / closing handle of the sliding door 20, 24 is a monitoring window, which is provided on the operation panel 14.
A confirmation indicator 26 for the position of the selected disc is provided in the sliding door 20 for visual recognition from the outside. In the illustrated case, the mechanism indicates that the uppermost stage of the magazine storage rack 16 is at the magazine eject operation position (scale = E ₃ ) according to the index S of the indicator 26.

[0039]

As described above, the disc changer device according to the present invention serves as a rattle noise prevention mechanism.
Since the protrusion that moves the lift panel equipped with the disk selection device is locked by the wedge-shaped recess, the disk selection device can be supported stably and reliably with a small pressing force, and it is a vehicle-mounted disk changer device. Even so, it is possible to sufficiently prevent rattle noise. Further, when the lift panel is moved, since the restraint of the wedge-shaped concave portion is released, the lift panel can be moved smoothly and power consumption for this can be saved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a front view of a disc changer device according to the present invention.

FIG. 2 is a plan view of a cross section taken along line II-II of FIG.

FIG. 3 is a front view of a plate cam applied to an embodiment of a disc changer device according to the present invention.

FIG. 4 is an operation explanatory view of a rattle noise preventing fixing mechanism of the disc changer device according to the present invention.

FIG. 5 is an operation explanatory view of a conventional rattle noise preventing 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 panel 33, 34, 35 shift pin 36a, 36b first plate cam 38a, 38b second plate cam 40a, 40b, 40c stairs -Shaped cam groove (first plate cam) 42a, 42b, 42c Step-shaped cam groove (second plate cam) 43 Straight guide groove 48 Disc ejection lever 50 Operation key 52 Arms 54a, 58a Joint 56, 60 Drive lever 84 fixed Mechanism 85 Lock plate 88 Wedge-shaped recess 92 Bell crank 93 Switching cam 95 Follower 96 Long hole 97 Pin 98 Tension spring

Front page continuation (72) Inventor Keiji Tokita Clarion Co., Ltd. 35-2 Hakusan 5-chome, Bunkyo-ku, Tokyo

Claims (4)

[Claims] 1. A plate having at least one stepped cam and a disc selecting device having a pin for engaging with the cam, wherein the disc selecting device is moved up and down by sliding the plate. A disc changer device adapted to selectively take out a required disc from a plurality of discs accommodated at a predetermined position, wherein a convex portion formed in the plate in the sliding direction of the plate, A disc changer device comprising: a control plate having teeth for pinching a pin; and a link for interlocking with the convex portion to cause the control plate to perform a pinching operation on the pin. 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. 3. A disc changer device having an elevating mechanism for selecting a desired disc from a plurality of stored discs, reproducing information recorded on the discs, and moving a disc selecting device which can return to the storage position again. ,
A protrusion, which is integrally formed with an elevating table on which the disc selecting device is mounted, a linear guide groove for guiding the protrusion along the disc storage direction, and a wedge-shaped recess for retaining the protrusion. A disc changer device comprising a fixing mechanism for a disc selecting device, which comprises a plate, an elastic member for urging the retaining plate toward the protrusion, and a cam mechanism for switching the urging force of the elastic member. 4. The elevating mechanism moves the disc selecting device linearly in a vertical direction by linearly moving a plate cam having a stepped cam groove linearly, and switches the biasing force of the elastic member. 4. The disc changer device according to claim 3, wherein a cam is provided in a part of the plate cam, and a follower of the cam and the restraint plate are interlocked with each other.