JPH0792973B2 - Disk player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is a so-called automatic system in which a magazine in which a plurality of discs are stacked and accommodated is mounted in a player so that reproduction over a plurality of discs is possible. The present invention relates to a chain type disk player.

(B) Conventional Technology With the spread of compact disc players (hereinafter referred to as CD players) in recent years, so-called auto-changer type CD players capable of continuous reproduction over a plurality of discs have been developed. In such a CD player, a magazine in which a plurality of discs are stacked and supported is mounted on the player, and at the time of reproduction, the reproducing portion is moved in the stacking direction to reach a desired disc position, and then the disc is pulled out from the magazine. And is reproduced by the reproducing unit.

Although there are various methods for positioning the reproducing unit at a desired disk position, the applicant step-feeds the reproducing unit by the distance between the disks as disclosed in Japanese Patent Application No. 62-49506 filed earlier. An apparatus for recognizing the position of the reproducing unit by counting the number of steps and positioning the reproducing unit so that the position of the reproducing unit matches the desired movement was devised. In such a device, the reproducing unit is step-fed by intermittently feeding a drive plate that moves the reproducing unit in the laminating direction of the disks by a gear means. That is, the continuous rotating force from the motor is intermittently applied to the drive plate by the gear means having the long teeth and the short teeth, thereby step-feeding the reproducing portion.

Similarly, the applicant is the actual application of the previous application, Sho 62-16560.
In No. 5, a device was devised to carry the magazine out of the player by utilizing the movement of the drive plate. Such a device pushes one end of a lever pivotally supported in the player by the movement of the drive plate, and pushes the magazine out of the player by the other end. However, if the drive plate is driven intermittently as in the above-mentioned application, naturally the magazine is intermittently unloaded from the player when the device of such application is used. It is preferable that the magazine is continuously carried out from the player.

(C) Problem to be Solved by the Invention It is an object of the present invention to solve the inconvenience that the magazine is intermittently unloaded as described above while intermittently moving the reproducing unit.

(D) Means for Solving the Problems In order to solve the above problems, the present invention provides a drive plate (17) arranged so as to be linearly movable so as to move an elevating plate (6) in the stacking direction of disks, and the drive plate. A drive unit (9) including a motor arranged to drive the plate linearly, a small-diameter gear unit (25) provided on the drive unit (9) side, and a drive plate (17) side provided. Rack gear (24) and magazine unloading means (15)
(26), the small-diameter gear portion (25) and the rack gear (24) have a predetermined stroke related to the movement of the elevating plate (6) among the total movement strokes of the drive plate (17). In A, the drive force is intermittently transmitted to the drive plate (17), and in the remaining stroke B, the drive plate (1) is transmitted.
7) meshes so as to continuously transmit a driving force to the magazine carrying-out means (15) when the driving plate (17) continuously moves.
The magazine (2) is configured to be pushed out of the player by (26).

(E) Action The drive plate is intermittently driven by the gear means in the stroke related to the movement of the reproducing portion, and continuously driven in the stroke related to the carry-out of the magazine. Therefore, the reproducing unit is moved stepwise in the stacking direction of the magazines, and the magazines are continuously carried out from the player.

(F) Example Hereinafter, one example of the present invention will be described with reference to the drawings.

In FIG. 1, (1) is a box-shaped chassis arranged in the player main body, and a magazine (2) carried in the player is loaded from the opening (3). Such chassis (1) is provided with guide holes (4), (4) and (5) on the side walls thereof, and these guide holes (4), (4) and (5) are provided with projections on the lift plate (6). The pins (7), (7) and (21) that have been removed are engaged. The lifting plate (6) is provided with a reproduction unit (not shown) such as a turntable, a pickup, a clamper, etc.
Is installed. Also, the guide groove (4) of the chassis (1)
Long holes (8) and (8) are provided in both side walls where (4) and (5) are provided. Further, on the top surface of the chassis (1) near the drive plate (17), a drive unit (9) for driving the drive plate, which will be described later, is provided. Therefore, the drive unit ( 9 ) is a motor (not shown) and a pulley (10) pivotally attached to the motor shaft.
A gear pulley (12) connected to a belt (11), a gear (13) meshing with the gear pulley (12), and a drive gear (14) meshing with the gear (13). Further, the chassis (1) has a lever (15) pivotally attached to a mounting portion where the magazine (2) is mounted.

Drive plates (16) and (17) are provided on the side surface of the chassis (1) with screws (18) (18) ... for sliding holes (19) (19) (19),
It is slidably screwed through (20), (20) and (20). At this time, the pins (7), (7) and (21) of the lifting plate (6) are inclined holes (22) (2) of the drive plates (16) (17) respectively.
Engage with 2) and (23). A rack gear (24) is arranged on the upper end of the drive plate (17), and the rack gear (24) meshes with the small-diameter gear portion (25) of the drive gear (14). Further, the drive plate (17) is provided with a protrusion (26) at its lower end, and the protrusion (26) is fitted into the long hole (8) of the drive plate (17) provided on the side surface of the chassis (1) described above. , Facing Shashi (1). The two drive plates (16) (17) are connected by a connecting lever (not shown) pivotally supported on the bottom surface of the chassis (1), and accordingly move in opposite directions.

Next, the operation of such a device will be described.

When the drive section ( 9 ) is driven, the small-diameter gear section (2
The pins (7), (7), and (21) of the lift plate (6) are driven by the drive plate (16) depending on the meshing state of the 5) and the rack gear (24).
Inclined holes (22) (22) and (23) inclined part (22a) of (17)
Drive plate (16) while engaged with (22a) and (23a)
(17) is driven intermittently, and pins (7) (7),
(21) is an inclined hole (22) (22), horizontal part (22b) of (23)
While engaged with (22b) and (23b), drive plates (16) (1
7) is driven continuously. Therefore, the guide holes (4), (4) and (5) of the chassis (1) and the inclined holes (22) (22) and (2)
The pins (7), (7), and (21) are intermittently biased in the vertical direction by the action of the inclined portions (22a), (22a), and (23a) of 3), so that the lift plate (6). Is raised and lowered intermittently. The elevating operation of the elevating plate (6), which will be described later in detail, is moved up and down by one step every half rotation of the drive gear (14). When the player is in the reproduction standby state, the lift plate (6) is positioned at the lowest position of the guide holes (4), (4), (5). When selectively reproducing a predetermined disk, the motor is driven in the ascending direction of the lift plate (6) to intermittently lift the lift plate (6). When the lift plate (6) is moved up by one step, the reproducing unit mounted on the lift plate (6) is moved to the magazine (2).
It is located on the disk tray (2a ₁ ) stored at the bottom of the. When it is further raised by one step, the reproducing portion is positioned at the _second disk tray (2a ₂ ) from the bottom.
After that, when the motor is further driven, the reproducing section is sequentially positioned at the disk tray position from the bottom.

The drive gear (14) described above is provided with through holes (27) (27) at positions symmetrical with respect to the rotation axis, and further on the locus of the through holes (27) (27) of the drive gear (14). The auto coupler (28) is arranged so as to be narrowed. Therefore, every time the drive gear (14) makes a half rotation, the light from the light emitting portion of the photocoupler (28) reaches the light receiving portion through the through holes (27) (27), and the photocoupler (2
The pulse signal is output from 8). The pulse signal is output after the elevating plate (6) has been moved up and down by one step. Therefore, the elevating plate (6) is counted by counting the number of pulses from the start of the selective reproduction operation of the disk. You can know the position of 6). Therefore, for example, when the third disk tray from the bottom is selected, the drive of the motor may be stopped when the three pulses are counted.

Next, the operation of carrying out the magazine will be described.

When carrying out the magazine, the lift plate (6) is brought to the lowest position, and the pins (7) (7) and (21) are inclined holes (22) and (22).
After reaching the end of the inclined portions (22a), (22a) and (23a) of (23), the drive plates (16) and (17) are further driven in the descending direction of the elevating plate (6). At this time, the pins (7), (7), (21) have the inclined portions (22a), (22a),
It is locked at the lowest position for engaging the horizontal portions (22b), (22b) and (23b) extended to (23a). Also at this time,
The drive plates (16) (17) are driven continuously.

In Fig. 3, the pins (7), (7) and (21) have slanted holes (22) (2).
It is the figure which showed the time at the junction of the inclined part and horizontal part of 2) and (23). At such time, the long hole (8) of chassis (1)
The protrusion (26) of the drive plate (17) facing the chassis (1) contacts the pin (15a) at one end of the lever (15). At this time, the pin (15b) at the other end of the lever (15) contacts the bottom end of the magazine (2). When the drive plate (17) is moved in the direction of the arrow from such a state as shown in FIG. 2, the protrusion (26) presses the pin (15a) arranged at one end of the lever (15), Turn the lever (15) counterclockwise. When the lever (15) is thus rotated counterclockwise, the pin (15b) arranged at the other end of the lever (15) presses the bottom end of the magazine (2), and the magazine (2) Is pushed out of the player (see FIG. 2). At this time, as described above, since the drive plate (16) is continuously moved, the magazine (2) is also continuously extruded. The magazine (2)
When is mounted on the player, the magazine (2) is locked in the player, but this lock is released when the magazine (2) is pushed out by the drive plate (17). When the pushing operation of the magazine is completed, the pins (7), (7) and (21) of the drive plates (16) and (17) reach the branch points of the inclined holes (22), (22) and (23). Until that time, the next magazine can be mounted.

Now, the gear means provided to execute the above-described operation will be described in detail below with reference to FIGS. 4 and 5.

The rack gear (24) has a long tooth (24a) with a long tooth length and a short tooth (2 with a short tooth length) from the end of the drive plate (17) toward the center.
4b) are formed in alternating order. The arrangement of such teeth continues even after passing through the middle of the rack gear (24), but in the vicinity of the end portion thereof, the long tooth (24a) having a long tooth length and the long tooth (24a) and the short tooth having a short tooth length ( 24b) middle tooth (24
c) is formed according to certain rules. That is, in the vicinity of the end of the rack gear (24), the order of teeth is long teeth (24a).
→ Middle tooth (24c) → Middle tooth (24c) → Long tooth (24a) ... The pitch between the adjacent teeth is the rack gear (24).
All are formed the same over the entire area.

On the other hand, in the small-diameter gear portion (25) of the drive gear (14), the tooth groove portions (25a) (25a) are arranged at axially symmetrical positions, and the tooth groove portions (25a) (2a)
5a) between the cylindrical portion (25b) (25b) and the toothless portion (25
c) (25c), long tooth portions (2
5d) (25d), and short tooth portions (25e) arranged at intermediate positions of long tooth portions (25d) (25d) are formed.

As shown in FIG. 4, the cylindrical portion (25
b), the short tooth portion (25e), and the missing tooth portion (25c) are the difference between the long tooth (24a) and the middle tooth (24c) of the rack gear (24), the middle tooth (24c) and the short tooth (24b), respectively. ) And the length dimension of the short teeth (24b). Also, the cylindrical part (25
b) is inserted between the long teeth (24a) and the short teeth (24b) of the rack gear (24) where the long teeth (24a) and the short teeth (24b) are continuous in an alternating order.

When the small-diameter gear portion (25) meshes with a portion (indicated by A in FIG. 4) in which the long teeth (24a) and the short teeth (24b) of the rack gear (24) are continuous in an alternating order, the small diameter Even if the gear part (25) is continuously driven by the motor, the cylindrical part (25
While b) is inserted between the long teeth (24a) (24a), none of the teeth of the small diameter gear (25) meshes with the rack gear (24), so the rack gear (24) has a driving force. Is not transmitted.
At this time, as described above, the cylindrical portion (25b) has the long teeth (24a) (24
The rack gear (24) is locked by the cylindrical portion (25b) even if an undesired driving force is applied in the driving direction because it is interposed between a). After that, when the small diameter gear portion (25) is further rotated, the long tooth portion (25d) of the small diameter gear portion (25) is located between the long tooth (24a) and the short tooth (24b) of the rack gear (24). Engage and drive the rack gear (24) again. When the small-diameter gear portion (25) rotates further, the long teeth (24) of the rack gear (24)
a) meshes with the tooth groove portion (25a) of the small diameter gear portion (25) to further drive the rack gear (24). After that, the small diameter gear portion (25) is further rotated, and the long teeth (24a) and the small diameter gear portion (25
When the engagement with a) is released, the cylindrical part (25b) of the small-diameter gear part (25) is inserted between the long teeth one pitch ahead of the above,
The drive of the rack gear (24) is stopped and the rack gear (24) is locked. Therefore, when the small-diameter gear portion (25) is continuously rotated, the rack gear (24) becomes 1 every half rotation.
It is driven intermittently by pitch.

Next, as shown in FIG. 5, when the small diameter gear portion (25) reaches the rear end portion (indicated by B in FIG. 4) of the rack gear (24), the short tooth portion (25e) of the small diameter gear portion (25). And Rack Gear (2
4) Even if the middle gear (24c) meshes with the hollow gear (24), the cylindrical gear (25b) of the small-diameter gear (25) is inserted between the long teeth as described above. Short tooth (25e)
It is driven continuously without being stopped due to the meshing of the center teeth (24c) with. Therefore, the rack gear (24) is continuously driven while the small-diameter gear portion (25) is rotating.

As described above, the rack gear (24) is driven intermittently or continuously depending on the meshing state with the small-diameter gear portion (25), and by the alternative rack gear drive, the step raising / lowering operation of the reproducing section and the magazine are performed. The continuous unloading operation is executed.

(G) Effect of the Invention As described above, according to the present invention, the drive plate (1) arranged so as to be linearly movable so as to move the lift plate (6) in the stacking direction of the disks.
7), a drive unit (9) composed of a motor or the like arranged to linearly drive the drive plate, a small-diameter gear unit (25) provided on the drive unit (9) side, and the drive plate (17). ) Side rack gear (24) and magazine unloading means (15) (26)
The small-diameter gear portion (25) and the rack gear (24) are arranged at a predetermined stroke A related to the movement of the elevating plate (6) out of the total movement stroke of the drive plate (17). The driving force is intermittently transmitted to the driving plate (17), and meshes so as to continuously transmit the driving force to the driving plate (17) in the remaining stroke B.
During the continuous movement of 7), the magazine carry-out means (15) (26)
Since the magazine (2) is pushed out of the player by means of the above, it is possible to intermittently feed the reproducing section and continuously carry out the magazine by a single drive section by the gear means.
It is extremely practical.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIGS. 2 and 3 are bottom views showing the operation of the embodiment, FIG. 4 is a perspective view showing a gear means, and FIG. 5 is the same. It is a top view which shows a gear means. (2) …… magazine, (6) …… elevating plate, ( 9 ) …… driving part, (16) (17) …… driving plate, (24), (25) …… rack gear, small diameter gear part (gear) means).

Claims (1)

[Claims] 1. A magazine (2) having a magazine (2) in which discs are stacked and housed so that the discs can be pulled out, is mounted on a player main body, and an elevating plate (6) on which a reproducing unit having a turntable, a pickup, etc. is mounted. In a disc player capable of reproducing the discs by moving the discs in the disc stacking direction, in a direction orthogonal to the disc stacking direction in order to move the elevating plate (6) in the disc stacking direction. A drive plate (17) arranged so as to be linearly movable, and in the drive plate (17), long teeth (24a) provided over a predetermined stroke A to stroke B of the linear movement of the drive plate (17), and a drive Short teeth (24b) having tooth lengths shorter than the long teeth (24a) over a predetermined stroke A of linear movement of the plate (17) and formed between the long teeth (24a). Similarly, the drive plate (17) is provided over a predetermined stroke B of the linear movement of the drive plate (17) and has a tooth length longer than that of the short teeth (24b) and the long teeth (24
a) formed by a middle tooth (24c), a drive unit (9) composed of a motor or the like arranged to linearly move the drive plate, and the long tooth (24a) in the drive unit (9). ), And a short tooth portion (25e) having a tooth length that meshes with the long tooth (24a) and the middle tooth (24c) but does not mesh with the short tooth (24b). A small-diameter gear part (25), a protrusion (26) provided on the drive plate (17), and a lever (15) that rotates by the protrusion (26) and pushes the magazine (2) out of the player. And a long tooth (24a) and a tooth groove (25a) of the small diameter gear portion (25).
Is the total stroke of the linear movement of the drive plate (17),
Predetermined stroke A related to the movement of the lifting plate (6)
In the gear plate (17) so as to intermittently transmit the driving force to the drive plate (17), and the tooth groove (25a) and the short tooth part (25e) of the small diameter gear portion (25).
And the long teeth (24a) and the middle teeth (24c) mesh so as to continuously transmit a driving force to the drive plate (17) in the remaining stroke B, and when the drive plate (17) moves intermittently. A disc player characterized in that the elevating plate (6) is moved up and down, and the magazine (2) is pushed out of the player by the magazine unloading means when the drive plate (17) continuously moves.