JPS6318260B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc mounting device for a disc playback device. Recently proposed PCM (pulse code modulation)
This type of digital audio disk has a diameter of approximately 12 cm, and can be installed in the same way as the currently used audio compact tape cassette. Therefore, the present invention provides a disk storage section in the disk playback device, and makes the disk storage section movable to two positions, an open side position and a performance side position, and when the lid is opened, the disk storage section is moved to the open side position. By moving the disk, the disk can be easily attached and detached, and the disk storage section can be smoothly moved to the two positions. Hereinafter, a detailed description will be given with reference to embodiments shown in the drawings. FIG. 1 shows an external perspective view of a disc playback device 1 having a disc mounting device according to the present invention. The main body of the disc playback device 1 is provided with a disc insertion slot 2 and a lid 5 (shown in FIGS. 2 and subsequent figures) that covers the disc insertion slot 2. The state shown in FIG. 1 is an open state, and at this time, the disk storage section 3 is raised to an open position facing the disk insertion slot 2. Therefore, disk D
It is extremely easy to insert and remove (withdraw). The configuration of the disk storage section 3 is shown in Figures 2 to 7.
It is clearly shown in the figure. The disk storage part 3 is pocket-shaped (bag-shaped) (inner surface is for protection of the disk,
There is a through hole 3a approximately in the center that allows the insertion of the disk holding/driving mechanism 4 , and a through hole 3d at the rear that allows the disk positioning pin 25 to be inserted. It is set up. Second
The state shown in the figure is the state in which the disk storage section 3 is raised and facing the disk insertion slot 2, and at this time,
The lid body 5 is opened. Therefore, disk D can be inserted. When the disk D is inserted into the disk storage portion 3 through the disk insertion opening 2, the disk D is inserted by suction by the loading mechanism 6 . Loading mechanism 6 (Figures 2 and 5 to 7)
(shown in the figure) includes a pair of loading rollers 7 facing the inside of the disk storage section 3 through the through hole 3e, a lever 8 on which the loading rollers 7 are erected, and a lever 8 for storing the disk. Part 3
A support shaft 9 rotatably supported on the upper surface, a rod 10 connected to the lever 8, a guide section 3b provided on the upper surface of the disk storage section 3 to slidably guide the rod 10, and this guide section 3b. and rod 10
It consists of a coil spring 11 wound around the rod 10 between the rod 10 and the rear end 10a. The loading roller 7 is rotatable and has a concave shape in the center to facilitate insertion of the disk D. The pair of loading rollers 7 are always urged inward (in the direction of sandwiching the disc) by the coil spring 11. Therefore, when the disk D is grasped with fingers and inserted into the disk storage part 3, the pair of loading rollers 7 exceed the diameter of the disk D, and then the coil spring 11
The disk D is automatically sucked by a pair of loading rollers 7 that are urged inward at . The insertion end of the disk D is connected to a rotary switch lever 1 provided inside the disk storage section 3.
2a is sucked to a position where it abuts against the disk insertion detection switch _SDI and the locking pin 12b provided opposite thereto. This condition is shown in FIGS. 3 and 5. At this time, a part of the disc D protrudes from the disc playback device 1 . That is, when detaching (pulling out) the disk D, it is possible to grasp this protruding portion with fingers. Now, the disk storage section 3 moves from the opening side position shown in FIGS. 3 and 5 to the performance side position shown in FIGS. 4 and 7 via the path shown by the broken line in FIG. 4. The moving mechanism 13 for performing such movement will be explained with reference to FIG. 2. Moving mechanism 13
are guide pins 14 (only two on one side are shown in FIG. 2) provided on the side wall of the disk storage section 3;
A guide groove 15 provided on the device main body side to guide the guide pin 14, an engagement pin 16 provided on the side wall of the disk storage portion 3, a feed nut 17 having an engagement groove 17a that engages with the engagement pin 16, A feed screw 18 screwed into this feed nut 17, this feed screw 1
8 and a feed motor 19 that rotates the motor. Therefore, by rotating the feed motor 19, the disk storage section 3 is moved from the position shown in FIG. 3 (FIG. 5) to the position shown in FIG. 4 (FIG. 7). When the disk storage section 3 is in the performance side position shown in FIG .
(as shown in FIGS. 2 to 4), and is rotationally driven. The disk holding/driving mechanism 4 includes a motor 20 supported by the apparatus main body, a drive plate 21 fitted to the rotating shaft of the motor 20, and a holder that is pressed onto the drive plate 21 by magnetic force and holds the disk D by sandwiching it therein. A plate 22, a rotating member 23 that rotatably supports the holding plate 22, and a rotating member 23.
It is composed of a support shaft 24 fixed to the device main body 1 so as to be rotatably supported relative to the device main body.
A magnet is embedded in the drive board 21 side, and a magnetic material is embedded in the holding board 22, and the holding board 22 is connected to the drive board 21.
It is pressed against the surface by magnetic force. Now, when the disk storage part 3 is in the position shown in FIG. 3 (FIG. 5, FIG. 8A), the holding plate 22 and the drive plate 21 are located away from the disk storage part 3. When the disk storage part 3 moves horizontally and further lowers diagonally, the holding plate 22 and the drive plate 21 enter into the disk storage part 3. Disk storage section 3
When the center of the disk D inserted into the disk storage section 3 is moved to a point where it substantially coincides with the center of the disk holding/driving mechanism 4, the large diameter portion of the disk positioning pin 25 moves toward the center of the disk D. , and further movement of the disk D is prevented (see FIGS. 6 and 8C). and,
Only the disk storage section 3 then moves diagonally downward to the playing position shown in FIG. 4 (FIGS. 7 and 8B). Therefore, in this playing position, the disc D, the rotary switch lever 12a, the disc insertion detection switch S _DI , and the locking pin 12b are
The contact between the two parts has been released (see Fig. 7). Also,
In the playing position, the rear end 10a of the rod 10 contacts the rear wall 1a of the disc playback device and the pair of loading rollers 7 open in the opposite direction of the arrow in FIG. 7 and the disk D are also released (see FIG. 7).
Furthermore, in the performance position, the disc D faces the small diameter portion of the disc positioning pin 25, and therefore does not come into contact with this pin 25 (see Fig. 4).
Figure 8B). Therefore, when the disc storage section 3 is in the performance position, the disc D is held only by the disc holding/driving mechanism 4 and is rotated smoothly. Now, the gist of the present invention lies in the configuration of the moving mechanism 13 that is devised so that the disc storage section 3 can be smoothly moved to two positions: the opening side position and the performance side position. Its feature lies in the relationship between the engagement pin 16, which constitutes a transmission means for transmitting the movement of the feed nut 17 to the disk storage portion 3, and the engagement groove 17a provided in the feed nut 17. This is the 9th
This will be explained with reference to FIG. The feature of the present invention is that the engagement groove 17a has a substantially doglegged shape, and has a groove that is substantially perpendicular to the parallel linear movement direction _l1 and the diagonally downward movement direction _l2 of the disk storage portion 3. It is in. With this configuration, in any case where the disk storage portion 3 is raised or lowered in the _l2 direction, the disk storage portion 3 is moved by the feed nut 17.
The driving force transmitted to the motor is substantially constant and efficiently transmitted (see FIG. 10, a, b, c). This is much more advantageous than, for example, the case where the engagement groove 17a is configured in a straight line (see FIG. 10d). As shown in FIG. 9, if the feed nut 17 is guided by the cylindrical guide shaft 33, the load generated when the disk storage section 3 is moved will not have an adverse effect on the feed screw mechanism, and the disk storage section 3 can be easily moved. The movement of part 3 becomes even smoother. Next, the lid opening/closing mechanism 26 will be explained. The lid body 5 can be opened and closed with respect to the main body of the disc playback device 1 (in this embodiment, it can be moved up and down; see FIG. 2), and is always urged upward (in the direction of closing the lid) by a coil spring 27. There is. A cam portion 5 is provided on the lid body 5.
a is provided, and when the disk storage section 3 is in the opening side position, the lower end 3c of the disk storage section 3 is in contact with the upper surface of the cam section 5a, so the lid body 5 is in the open state (No. (See Figure 11). Now, when the disk storage section 3 starts moving to the performance side position by the moving mechanism 13, the lower end 3c of the disk storage section 3 comes into contact with the inclined surface of the cam section 5a, and the lid body 5 is moved by the elastic force of the coil spring 27. The lid is moved in the direction of closing the lid, and the lid is completely closed during the playing state. Conversely, when the disc storage section 3 is moved from the performance side position,
When it starts moving to the opening side position, the lower end 3c of the disk storage part 3 pushes down the inclined surface of the cam part 5a, and the lid body 5 moves in the opening direction (see FIG. 12). That is, the cam portion 5a, the coil spring 27, and the lower end 3c of the disk storage portion 3 constitute a lid opening/closing mechanism 26 . Finally, the operation of the disk mounting device according to the present invention will be summarized with reference to the time chart of FIG. 13 and the block diagram of FIG. 14. In addition, in FIG. 14, A is a state in which the disk storage section 3 is in the opening side position (FIGS. 3, 5, and 8 A);
A is the state in which the disc storage section 3 is in the non-opening side position, and B is the state in which the disc storage section 3 is in the performance side position (Fig. 4, Fig. 7, Fig. 8 B)
, indicates the switch contact in the non-playing position. It is now assumed that the lid body 5 is in an open state and the disk storage section 3 is in the opening side position. In this state, when the disk D is inserted into the disk storage portion 3 through the disk insertion opening 2, the disk D is sucked and inserted by the loading roller 7, and comes into contact with the disk insertion detection switch _SDI . Disk insertion detection switch
When _SDI is turned on, the output of the differentiating circuit 28 is input to a flip-flop (hereinafter referred to as F.F.) 29 via _{an up} (opening side position) detection switch SUP, and this F.F.29 is set. Therefore, F.
The Q output of F29 becomes H level, and the output of gate 30 becomes H level. That is, a forward rotation instruction output to the feed motor 19 is obtained, and the motor 1
9 starts rotating, and the disk storage section 3 starts moving. At this time, the up detection switch S _UP switches to . Furthermore, while the disk storage section 3 is moving to the performance side position, the disk D moves away from the disk insertion detection switch S _DI , and this switch
S _DI switches to off side. When the disk storage section 3 moves to the performance side position, the feed nut 17 comes into contact with the down (performance side position) detection switch S _DO , which switches the switch S _DO to the B side, and the output of the gate 30 changes to the L side. level, and the forward rotation of the feed motor 19 stops. This state becomes the disc playing state. To eject disk D, press eject button 3.
2 (shown in Figure 1) to switch the normally open eject switch S _E to the on side. Then, F.F29 is reset and the output becomes H level. Since the up detection switch S _UP is switched, the output of the gate 31 becomes H level, and a reverse rotation instruction output to the feed motor 19 is obtained. Accordingly, the motor 19 starts rotating in reverse, and the disk storage section 3 starts moving to the opening side position. At this time, the down detection switch S _DO switches to .
As the movement of the disk storage section 3 progresses, the disk insertion detection switch _SDI is switched to the on side, but at this time the _up detection switch SUP is switched on, so F.F29 is not set. That is, the motor 19 continues to rotate in reverse. When the disk storage section 3 moves to the opening side position, the feed nut 17 comes into contact with the up detection switch S _UP , which switches the switch S _UP to A, and the gate 3
1 becomes L level, and the rotation of the feed motor 19 stops. After that, when the disk D is pulled out, the disk insertion detection switch S _DI is also turned off. According to the present invention described above, since the disk storage section can be moved to two positions, the opening side position and the performance side position, it is extremely easy to attach and detach the disk. Furthermore, when moving the disk storage section, the transmission means composed of the engagement groove and the engagement pin that are perpendicular to the direction of movement is used, so that the driving force of the disk storage section can be transmitted efficiently and approximately. It is constant and convenient.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the disc playback device, FIG. 2 is a perspective view of the disc mounting device according to the present invention, FIG. 3 is a diagram showing the disc storage section in the open position, and FIG. FIGS. 5, 6, and 7 are diagrams showing different states for explaining the operation of the loading mechanism;
Fig. 8 is a diagram showing the relationship between the disk and the disc positioning pin, Fig. 9 is a diagram showing the moving mechanism part, Fig. 10 is a diagram for explaining the operation of the moving mechanism, and Fig. 1
1 is a diagram showing the lid opening state, FIG. 12 is a diagram showing the starting state of the lid opening operation, FIG. 13 is a time chart, and FIG. 14 is a block diagram. 3 is a disk storage section, 4 is a disk holding/driving mechanism, 13 is a moving mechanism, engagement pin...16, feed nut (feed member)...17, and engagement groove...17a.

Claims (1)

[Claims] 1. A disc storage unit that stores an inserted disc and brings it to a performance position, and a moving mechanism that horizontally moves the disc storage unit at the disc insertion position and then lowers the disc storage unit diagonally downward. , the moving mechanism includes a guide groove having a horizontal part and an inclined part extending to the rear of the horizontal part, a feeding member that moves in the front-rear direction, and a feeding member disposed on the feeding member, an engaging groove having a vertical portion and an inclined portion, respectively perpendicular to the portion, and an engaging pin disposed in the disk storage portion and commonly engaged with the guide groove and the engaging groove, the feeding member 1. A disk mounting device characterized in that said disk storage section is moved horizontally and diagonally along said guide groove by driving said guide groove.