JP3673980B2 - In-vehicle disc player - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle disc player, and more particularly, to a means for detecting the loading start position, ejection end position, and loaded disc size of the disc.
[0002]
[Prior art]
An example of a disk position detecting means of a conventional in-vehicle disk player is shown in FIG. On the printed board shown in the figure, the reflection type photosensors B, C, D in which the LED and the photosensor are assembled and the LED of the transmission type photosensor A in which the LED and the photosensor are assembled are attached. The loading start position of 12 cm CD is shown at 14A. At this position, the transmission type photosensor A and the reflection type photosensors B and D are turned on, a feed roller (not shown) is driven in the disc loading direction, and 12 cm CD is fed to the reproduction position indicated by 14B.
[0003]
The loading start position of 8 cm CD is shown at 13A. This becomes a transmission type optical sensor A Gao down in position, is driven feed roller not shown, is fed to a reproduction position indicated 8 CMCD is at 13B.
[0004]
When ejecting a 12 cm CD from the playback position, the feed roller is driven in the disc eject direction and fed to the eject stop position indicated by 14C. Eject stop position once turned off from the transmission-type optical sensor A is turned on when the disk center hole passed through, it is detected to be turned on after passing through the disc center hole, further, is detected by the reflective optical sensor C is off The
[0005]
When ejecting an 8 cm CD from the playback position, the feed roller is driven in the disc eject direction and sent to the eject stop position indicated by 13C. The eject stop position is detected when either the reflection type photosensor B or D is turned off. In other words, when the disc is biased, the ejection position is detected when the disc is released first from the reflective optical sensor on the side opposite to the disc bias direction and the optical sensor is turned off.
[0006]
[Problems to be solved by the invention]
The conventional disk position detecting means described above uses a photo sensor, but there is a problem that the cost of the photo sensor is high because the unit price is high and the number used is large. In addition, there is a problem that malfunction may occur if there is light leakage from the backlight of the device or if the light quantity is reduced due to dirt. In order to prevent such a malfunction, a dustproof structure and a light shielding structure are required. In addition, the operation control microcomputer has a large number of ports, which increases the cost of the control device and wiring.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to provide a disk position detecting means that is inexpensive to manufacture and does not cause a malfunction.
[0008]
[Means for Solving the Problems]
The vehicle disc player of the invention comprises a pair of levers rotatably supported on the chassis has a periphery that abuts the abutting portion of the small-diameter disk and the large-diameter disc projects in the path of the small-diameter disk and the large-diameter disk And a pair of connecting members, one end of which is rotatably supported by each of the pair of levers and the other end of which is rotatably connected by a shaft, and a guide provided on the chassis for guiding the shaft in the disk loading direction. forming a groove, in one of the link device, provided the second micro switch for detecting the position of the first micro switch and the shaft for detecting one of the rotational position of the lever of the link device, the second The size of the loaded disc is identified by the output of one microswitch, and the small and large diameter discs are identified by the output of the second microswitch. Detecting the loading start position, the the output of the second microswitch eject end of the small-diameter disk is detected, the in-vehicle disc player ejecting end position of the large-diameter disk is detected by an output of the first microswitch In the above, the recesses are formed on both side edges of the guide groove for guiding the shaft, and the shaft guided by the guide groove enters the recess when the pair of levers are pressed by a small diameter disk or a large diameter disk. Thus, the one-push state of the pair of levers is corrected .
[0010]
Further, in the disk player for placing before Symbol vehicle, in which the first and second micro switches provided on a printed board on which a circuit is formed to control the disc playback unit.
[0011]
In the above configuration, the number of microswitches as detection means may be two, which is smaller than the conventional one. Further, since the position of the device member is detected, an inexpensive micro switch can be used . Since these detection means do not need to be opposed to each other so as to sandwich the disk, they can be provided on a printed circuit board that controls the disk reproducing unit, thereby reducing wiring costs.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An in-vehicle disc player according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an in-vehicle disc player according to an embodiment of the present invention, and FIG. 2 is a front view showing the in-vehicle disc player. 1 shown in the figure is a main body chassis which supports the entire apparatus. The reproducing unit chassis 2 is supported in a floating state by the main body chassis 1 via dampers 11, 11,... And supports a disk motor, a turntable for reproducing a disk, and an optical pickup. The reproducing unit chassis 2 supports the levers 4 and 5, the connecting members 6 and 6, and the microswitch operating member 12 which are disk position detecting means of the present invention.
[0013]
The feed roller 10 is brought into pressure contact with the disk and is rotationally driven by a drive mechanism (not shown) to load and eject the disk. The feed roller 10 is retracted to a position away from the disk during disk reproduction.
[0014]
The lever 4 is rotatably supported by the reproducing unit chassis 2 and has a shaft 4a extending up to the disk moving path. One end of a connecting member 6 is rotatably connected to the lever 4. The lever 5 is rotatably supported by the reproducing unit chassis 2 and has a shaft 5a extending up to the disk moving path. One end of a connecting member 6 is rotatably connected to the lever 5.
[0015]
As shown in detail in FIGS. 4 and 5, the other ends of the connecting members 6, 6 are connected to each other by a shaft 12 a of the microswitch operating member 12 so as to be rotatable. The shaft 12 a and the shaft 12 b of the microswitch operating member 12 are inserted through the guide groove 2 a of the reproducing unit chassis 2. Recesses 2b and 2b are formed on both edges of the guide groove 2a. Since the shaft 12a of the microswitch operating member 12 is guided by the guide groove 2a, the levers 4 and 5 rotate in synchronization.
[0016]
Microswitches 7 and 8 are fixed to a printed circuit board 3 that controls the operation of the apparatus. The microswitch 7 constitutes the first detection means of the present invention, and the microswitch 8 constitutes the second detection means of the present invention. A tension coil spring 9 hung between the reproducing unit chassis 2 and the microswitch operating member 12 biases the microswitch operating member 12 in the direction of the arrow (disk loading direction) shown in FIG. When there is no disk, the microswitch operating member 12 is in a position to operate the microswitch 7.
[0017]
As shown in FIG. 3, when the 8 cm CD 13 or 12 cm CD 14 is inserted to the loading start position, the levers 4 and 5 are rotated clockwise and counterclockwise, respectively. As shown in detail in FIG. Moves in the disc eject direction, and the microswitch 7 is turned off to detect the disc loading start position. Then, the feed roller is driven to feed the disc in the loading direction.
[0018]
When the 8 cm CD is fed, the micro switch 8 is not actuated even at the maximum rotation position of the lever 4 as shown in FIG. When the 8 cm CD is inserted by being shifted to one side, as shown in FIG. 7, the shaft 12a enters the recess 2b provided in the guide groove 2a, so that the levers 4 and 5 are not rotated. Be guided to. When the 8 cm CD moves to the center position, it is fed to the reproduction position by the feed roller.
[0019]
When a 12 cm CD is fed, the microswitch 8 is operated at the maximum rotation position of the lever 4 as shown in FIG. By actuating the microswitch 8, 8 cm CD and 12 CD are identified, and the feeding roller is driven as much as necessary to feed the respective discs to the reproduction position. As described above, when the lever 4 or 5 is pressed by the 8 cm CD, the 8 cm CD is guided to the center by the levers 4 and 5 due to the action of the recess 2b. It is never mistaken for 12 cm CD.
[0020]
When ejecting an 8 cm CD, the levers 4 and 5 are once rotated and then returned to their original positions, and the micro switch 7 is turned on to detect the eject stop position. When ejecting a 12 cm CD, the levers 4 and 5 are rotated, the micro switch 8 is actuated, and then returned to the original position, and the micro switch 8 is turned off as shown in FIG. .
[0021]
【The invention's effect】
According to the present invention, it is possible to provide a disk position detecting means that is free from malfunction and inexpensive to manufacture.
[Brief description of the drawings]
FIG. 1 is a plan view showing an in-vehicle disc player according to an embodiment of the present invention.
FIG. 2 is a front view showing the in-vehicle disc player.
FIG. 3 is a plan view for explaining the operation of the in-vehicle disc player.
4 is a partially enlarged view of FIG. 3;
FIG. 5 is a front view of the portion shown in FIG. 4;
FIG. 6 is a plan view for explaining the operation of the in-vehicle disc player.
7 is a partially enlarged view of FIG. 6;
FIG. 8 is a plan view for explaining the operation of the in-vehicle disc player.
FIG. 9 is a plan view for explaining the operation of the in-vehicle disc player.
10 is a partially enlarged view of FIG. 9;
FIG. 11 is a plan view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body chassis 2 Reproduction | regeneration part chassis, 2a Guide groove, 2b Indentation 3 Printed circuit board 4, 5 Lever 6 Connecting member 7 Micro switch 8 Micro switch 9 Pulling coil spring 10 Feed roller 11 Damper 12 Micro switch operation member, 12a axis, 12b axis 13 8cm CD
14 12cm CD
A Transmission type optical sensor B, C, D Reflection type optical sensor

Claims (2)

Rotatably on the chassis has a periphery that abuts the abutting portion of the small-diameter disk (13) small-diameter disk and projects into the passage of the large-diameter disk (14) (13) and large-diameter disc (14) (4a, 5a) One end of each of the pair of levers (4, 5) supported by the two and the pair of levers (4, 5) is rotatably supported, and the other ends are rotatably connected by the shaft (12a). A pair of connecting members (6, 6) and a guide groove (2a) provided in the chassis (2) for guiding the shaft (12a) in the disk loading direction form one link device, and the link A first micro switch (8) for detecting one rotational position of the levers (4, 5) of the apparatus and a second micro switch (7) for detecting the position of the shaft (12a) are provided, and the first micro switch (8) is provided. The output of the micro switch (8) The size of the disk to be loaded is identified, the loading start positions of the small diameter disk (13) and the large diameter disk (14) are detected by the output of the second micro switch (7), and the second micro switch (7 ejecting the end position of the small-diameter disc (13) by the output of) is detected, the vehicle disc player ejecting end position is detected of the first large-diameter disk by the output of the microswitch (8) (14), wherein Recesses (2b, 2b) are provided on both side edges of the guide groove (2a) for guiding the shaft (12a), and the pair of levers (4, 5) are separated by a small diameter disk (13) or a large diameter disk (14). When pushed, the shaft (12a) guided by the guide groove (2a) enters the recesses (2b, 2b), thereby the pair of levers. Automotive disc player constructed as single push condition is corrected for (4,5). The in- vehicle disc player according to claim 1, wherein the first and second micro switches (7, 8) are provided on a printed circuit board (3) on which a circuit for controlling a disc reproducing unit is formed.

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