JPH0373467A - Disk loading mechanism - Google Patents

Abstract

PURPOSE:To immediately start loading without receiving a shock at the time of holding a disk between carrier rollers by providing a control means for starting/stopping the carrier rollers according to plural disk detecting sensors and their detecting signals. CONSTITUTION:The insertion of a disk is judged by the control means 31 based on the combination of detecting signals from the detecting sensors A-E, and a driving motor 32 is activated to start the rotation of the carrier rollers 4. Then, the optional time from a starting point of the time when the insertion is detected is set by the control means 31, and then whether the disk is held between the carrier rollers 4 or not is judged based on the combination of the detecting signals again from the detecting sensors A-E from the detecting time of the disk insertion. Then, when it is judged that the disk is in the holding position therebetween within the set time, the operation of the driving motor 32 is continued, and when it is judged that the disk is not in the holding position therebetween within the set time, the driving motor 32 is stopped. By this method, the disk can be started fro loading without receiving a load at the time when the disk is held between the carrier rollers 4.

Description

[Detailed Description of the Invention] [Industry] Second Field of Application] The present invention relates to a disc loading mechanism for conveying and loading an inserted disc onto a turntable in a compact disc player, a laser disc player, etc. In particular, it relates to technical improvements to avoid wasteful operation of the drive motor and to protect the drive motor.

[Prior Art] For example, in a compact disc player, the disc is played by mounting the disc on the turntable, but when mounting the disc on the turntable, the surface of the turntable must be opened. , a method of placing the disk on the turntable from this opening directly or via a guide, or placing the disk on a horizontally movable slider and sliding this slider onto the turntable from the outer circumference of the turntable. Accordingly, a method of transporting the disc onto a turntable has been conventionally adopted.

However, if the following disc mounting method is adopted, the
When the disc is installed and used in a location where it is susceptible to vibration, the vibration makes it difficult to mount the disc.

For this reason, in recent years, as shown in Figure 6, by transporting the disc onto the turntable while firmly holding it, the disc can be reliably transported onto the turntable without being affected by vibrations. A disc loading mechanism has been proposed that allows the disc to be mounted. In this disc loading mechanism, a turntable 2 is provided in the center of a chassis 1, a disc insertion slot 3 is provided on the front surface of the chassis 1, and a conveyance roller 4 is provided between the turntable 2 and the disc insertion slot 3. Then, as shown in FIG. 7, the disk 6 inserted from the disk insertion slot 3 is sandwiched from above and below by the conveyance roller 4 and the support member 5 disposed opposite thereto, and the conveyance roller 4 is rotated. The disc 6 is then conveyed onto the turntable 2.

At this time, the front edge of the disc 6 comes into contact with a pair of positioning stopper bins 7 provided at two locations in front of the conveyance path, so that the center hole 6a of the disc 6 is aligned on the tongue table 2. It has become. When this suction is completed and the disc and turnchill pull are aligned, the chucking operation plate (not shown) is activated to mount the disc on the turntable, and then the chucking operation plate is activated. The completed position is detected by a micro switch, etc., and the loading motor is stopped to complete loading.

According to such a disk loading mechanism, since the disk 6 can be transported while being held securely, there is no fear that the disk 6 will rattle or shift its position even if it is subjected to vibrations during transportation, and the disk 6 can be reliably loaded. It is possible to load it onto the digital table 2.

However, the above conventional techniques have the following drawbacks.

That is, the conveyance roller 4 is normally held at -L by a spring or the like.
Therefore, when the inserted disk 6 is securely held between the transport roller 4 and the support member 5, in other words, after the disk 6 is held between the transport rollers 4, the transport roller 4 When starting rotation, transport roller 4
It is necessary to push down the disc 6 to make it get caught between the conveyance roller 4 and the support member 5, and the disc 6 must be pushed in with a strong force, which deteriorates the operational feeling.

Therefore, the rotation of the conveyance roller 4 is started before the disk 6 is pinched by the conveyance roller 4, and loading is started immediately when the disk 6 is pinched by the conveyance roller 4, thereby improving the operation feeling. This is desirable. However, in this case, even if the transport roller 4 is rotated, if the disc 6 is not inserted to the position where it is sandwiched between the transport rollers 4, the transport roller 4 continues to rotate without being able to load the disc 6, and the transport roller 4 is rotated. Since the drive motor continues to operate, an extra load is added to the drive motor, which not only shortens its lifespan, but also makes it impossible to perform disc play unless the operator notices, which is extremely inconvenient. .

[Problems to be Solved by the Invention] The present invention has been proposed in order to solve the above-mentioned drawbacks of the prior art, and its purpose is to prevent the inserted disc from being pinched by the transport rollers. The drive motor is operated so that loading can be started immediately without receiving any load when the disc is clamped by the transport rollers, and if the disc cannot be clamped between the transport rollers due to insufficient insertion of the disc, the drive motor is activated. An object of the present invention is to provide an excellent disk loading mechanism which can provide an excellent operational feeling by stopping the disk after a certain period of time, and which does not cause the drive motor to operate unnecessarily.

[Means for Solving the Problems] A disc loading mechanism according to the present invention includes a chassis, a turntable provided at the center of the chassis, a disc insertion slot provided at the front of the chassis, and a disc loading mechanism between the turntable and the disc insertion slot. In the disc loading mechanism, which is provided in A control means for starting and stopping a drive motor based on a plurality of disk detection sensors provided in the middle of a disk transport path up to the table, and patterns of combinations of detection and non-detection of these disk detection sensors. It is characterized by having the following.

The control means determines whether or not a disc has been inserted from the disc insertion slot based on the pattern of combinations of detection and non-detection by the disc detection sensor, and when determining that the disc has been inserted, starts the drive motor and Based on the pattern of combinations of detection and non-detection by the disk detection sensor from the time of detection of insertion until a preset arbitrary time elapses, it is determined whether or not the disk has been inserted to the position where it is held between the transport rollers. If it is determined that the gripping position is reached within a set time, the drive motor continues to operate, and if it is determined that the gripping position is not reached within the set time, the drive motor is stopped. .

[Operation] The operation of the disc loading mechanism of the present invention having the above-described configuration is as follows. In other words, the insertion of the disc is detected by the insertion detection sensor, and the control means activates the drive motor to start rotating the transport rollers, so that when the disc is clamped by the transport rollers, the disc can be immediately moved without receiving any impact. Loading can be started, and the operation feeling is excellent. Furthermore, even if the insertion of a disc is detected, the clamping phase detection sensor detects whether the disc has been inserted sufficiently to the position where it is clamped by the transport rollers, and if the insertion amount is insufficient and the disc cannot be transported. In this case, the control means can stop the drive motor after a certain period of time, so there is no risk of the drive motor being operated unnecessarily.

[Example J] Fig. 1 shows an example in which the disc loading mechanism of the present invention as described above is applied to an in-vehicle compact disc player that is compatible with both 12 cm standard discs and 8 cm standard small diameter discs. This will be specifically explained using FIGS. Note that the same members as in FIGS. 6 and 7 are designated by the same reference numerals, and their explanations will be omitted.

That is, as shown in FIG. 1, five detection sensors A to E are arranged close to the drive roller 4 on the disk insertion opening 3 side thereof.

These detection sensors include a first end sensor A1 located at both ends, a second f# Al sensor E, and these end sensors A,
a central sensor C located approximately in the center of E; a first width sensor B located between each end sensor A, E and the central sensor;
It is composed of a second width sensor D.

As shown in FIG. 2, these detection sensors A to E are composed of a pair of LEDs 21 and a light receiving section 22, and when there is no light blocking object between the two, the light from the LED 21 is transmitted to the light receiving section 22. In order to reach the target, the light receiving section 22 senses that it is in an open state, and takes the non-detection mode. On the other hand, if there is a light blocking object between the LED 21 and the light receiving section 22, the light from the LED 21 will not reach the light receiving section 22, so the light receiving section 22 will sense the closed state and will enter the detection mode. ing. Specifically, when the vapor deposited portions 8a, 12a of the 8cm disk 8 and 12cm disk 12 as shown in FIG. When the disks 8 and 12 do not overlap when the sensor is closed and the detection mode is set, or when only the transparent parts of the outer or inner peripheries of the vapor deposition parts 8a and 12a overlap, this detection sensor opens and becomes non-operating. Detection mode is selected. Here, details of the arrangement of the five sensors A to E shown in FIG. 1 with respect to the 8 cm disk and the 8.12 cm disk 12 will be explained.

First, the center sensor C is located at a position slightly shifted to the left in the figure with respect to the center of the turntable 2, and is located at 12c.
When inserting the m disk 12 and when inserting the 8 cm disk 8 from the center, the vapor deposited portion 8a of each disk 8.12
, 12a, it is first closed.

Next, the first width sensor B and the second width sensor D are 12c
When inserting the m disk 12 and when inserting the 8 cm disk 8 from the center, the vapor deposited portion 8a of each disk 8°12
, 12a, so as to be reliably closed. If the insertion position of the 8cm disk 8 deviates greatly toward the left and right ends in the figure, the intermediate sensor B or D on the opposite side to the direction of deviation opens, but if the deviation in the insertion position is small, both of them open. It is set to be closed. In addition, if the insertion position of the 8cm disk 8 is largely shifted to the left in the figure because the center sensor C is shifted to the left in the figure, the first intermediate sensor B
closes at almost the same time as the center sensor C, and the insertion position of the 8cm disk 8 is shifted toward the right side in the figure (if it is shifted,
The second intermediate sensor D is designed to close before the central sensor C.

Finally, the first end sensor A and the second end sensor E are 12
When the 12cm disk 12 is inserted, the evaporated portion 12a of the 12cm disk 12 ensures that the 12cm disk 12 is closed. Further, the distance between the first end sensor A and the second end sensor E is made larger than the diameter of the 8 cm disk 8, so that at least one of them opens when the 8 cm disk 8 is inserted. . That is, as shown in FIG. 1, when the 8cm disk 8 is inserted from the center, both the first end sensor A and the second end sensor E are open, and When inserted toward the center right, end sensor A or E on the same side
is closed, but the opposite end sensor E or A
is definitely set to open.

Furthermore, 12cm disc 12 or 8cm disc 8
When the paper is held between the conveyance rollers 4, at least three adjacent detection sensors are closed. That is, at the position where the 12 cm disk 12 is held between the conveyance rollers 4 or the position where the 8 cm disk 8 is held between the conveyance rollers 4 at the center position, the three central detection sensors (B.

C and D) are now closed. Also, 8c
At the position where the m-disk 8 is shifted to the left in the figure and is held between the conveyance rollers 4, the same three sensors (B,
C, D), or the three sensors on the left side (A, B,
C) is closed, or the first end sensor A and the second intermediate sensor D are closed simultaneously, so that a total of four sensors (A, B, C, D) are closed. Similarly, when the 8cm disk is shifted to the right side in the figure and is held between the transport rollers 4, the three central sensors (B, C, D) are closed, or the three sensors on the right side in the figure are closed. Either the sensors (C, D, E) are closed, or the first intermediate sensor B and the second end sensor E are closed simultaneously, resulting in a total of four sensors (B, C).

D, E) are now closed.

On the other hand, a control means 31 is connected to these detection sensors A to H, as shown in FIG.

The control means 31 determines the insertion of a disk based on the combination of detection signals from the detection sensors A to E, and starts the drive motor 32 to start the rotation of the conveyance roller 4. Further, an arbitrary time starting from the time of detection of insertion is set in the control means 31, and this set time is at least the period from when the insertion of the disc is detected until the disc is nipped by the transport rollers 4. The time taken is longer than expected. Then, from the point of time when the insertion of the disk is detected, the control means 31 again judges whether or not the disk is held between the conveying rollers 4 based on the combination of detection signals from the detection sensors A to E, and within the set time. The drive motor 32 is configured to continue operating if it is determined that it is in the clamping position, and to stop the drive motor 32 if it is determined that it is not in the clamping position within a set time.

In FIG. 1, reference numeral 23 indicates a pair of stopper arms which are rotatably arranged around a support shaft 23a and have a stopper pin 24 at the rotary end. The 8cm disc 8 in front is held at the swivel collar position by the suction of a solenoid (not shown), and 1
When the 2cm disc 12 is inserted, the solenoid is released from suction and becomes rotatable, and is pushed by the 12cm disc 12 and moves to the back, as shown in Figure 1.
It rotates to the stopper position for the 12cm disc 12 and is fixed at the same position.

Further, the pair of stopper arms 23 are connected by a gear 23b provided at their base ends, and are configured to move back and forth in synchronization.

The operation of this embodiment having the following configuration will be explained according to flowchart 1 of the fourth factor.

■Disk insertion monitoring state (loading standby state) The disk insertion monitoring state includes central sensor C and second middle sensor 1.
Only the m sensor D is turned on, and the other detection sensors A, B, and E are turned off. In this way, the two detection sensors C and D
The reason why only the light is turned on is as follows. That is, in the case of in-vehicle audio equipment, it is necessary to put the mounted compact disc player in a startup standby state even when the engine is not operating, and with the photo detection means as in this embodiment, it is not possible to keep the LED 21 lit. It becomes necessary. However, if the current is not kept as low as possible, there is a risk that the battery will run out, so all detection sensors other than the minimum required are turned off to reduce current consumption.

Furthermore, the reason why the central sensor C and the second intermediate sensor D are used as the detection sensors that light up is because they are the detection sensors that close first when a disk is inserted. That is, as mentioned above, when inserting a 12 cm disc and when inserting an 8 cm disc from the center, the center sensor C closes first, and if the insertion position of the 8 cm disc 8 shifts significantly to the left in the figure, the sensor C closes first. 1. If the intermediate sensor B and the center sensor C close almost simultaneously and the insertion position of the 8cm disk 8 shifts significantly to the right in the figure, the second width sensor D closes before the center sensor C. If the central sensor C and the second intermediate sensor D are turned on, insertion of the disc can be detected before the disc comes into contact with the roller.

(2) Disc Insertion Detection In the disc insertion monitoring state as described above, if either or both of the central sensor C and the second width sensor D close and issue a detection signal, it is determined that a disc has been inserted. The other three detection sensors A and B immediately turned off.

At the same time, the drive motor (not shown) is started and the transport roller 4 is turned on.
start rotating.

■Disk sandwiching detection Furthermore, within a set time starting from the time of disc insertion detection, at least three adjacent detection sensors, that is, sensors (A, B, C) or sensors (B, C, D)
) or when the sensors (C, D, E) close and issue a detection signal, the inserted disk
It is determined that the motor is caught between the two, and the drive motor continues to operate.

In this case, since the conveying rollers 4 are rotated in advance, loading can be started immediately when the disk is nipped by the conveying rollers 4 without receiving any impact, and the operation feeling is excellent.

■ Disk clamping non-detection On the other hand, if at least three adjacent detection sensors do not align within the set time starting from the time of insertion detection, the disk is not transported because the amount of disk insertion is insufficient. It is determined that the roller 4 is not pinched, and the drive motor is stopped. Therefore, there is no possibility that the drive motor will operate unnecessarily if the disk cannot be loaded due to an insufficient amount of disk insertion.

In this embodiment, the central sensor C and the 2nd and 11th sensors D act as sensors for both insertion detection and pinching detection, and the remaining sensors A, B, and E act as sensors exclusively for pinching detection. do.

By the way, the present invention is not limited to the embodiment described above. For example, as shown in FIG. 5, in addition to the five detection sensors A to E in the embodiment described above, a It is also possible to provide an insertion detection sensor H exclusively for detection and use the five detection sensors A to E as sensors exclusively for detecting pinching. In this example, an LED that is lit all the time
Only one is required, and the insertion of a disc can be detected earlier than in the previous embodiment.

In addition, in the embodiments described above, a compact disc player of the type that allows an 8cm disc to be inserted from any part of the disc insertion slot is assumed.
The present invention is also applicable to a type of player in which a disc is always inserted in a straight direction from the center position, and in this case, for example, a disc detection sensor for detecting insertion of an IH and one disc at the center position The number of disk detection sensors can be reduced by providing only a disk detection sensor for detecting pinching. Conversely, a configuration in which more detection sensors are provided is also possible, and the location where the detection sensors are provided is not limited to the disk insertion slot side of the transport roller, but may also be provided on the turntable side of the transport roller. Yes, the arrangement and number of detection sensors can be selected as desired. Furthermore, the present invention can be similarly applied to compact disc players that can only handle 12crr+ discs or 8cm discs, and in this case, the configuration can be further simplified. In addition, the present invention is not limited to in-vehicle compact disc players, but can be similarly applied to compact disc players in general, and can be similarly applied to laser disc players, etc., and can be similarly applied to compact disc players in general. It is something that can be effective.

[Effects of the Invention] As explained above, according to the present invention, a simple configuration is provided in which a plurality of disk detection sensors and a control means for starting and stopping the conveying rollers based on these detection signals are provided. As a result, loading can be started immediately without receiving a shock when the disc is clamped by the transport rollers, and if the disc is not clamped by the transport rollers due to insufficient insertion of the disc, the drive motor can be stopped immediately. It is possible to provide an excellent disk loading mechanism that provides a good operational feeling and does not cause the drive motor to operate unnecessarily.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a disk loading mechanism according to the present invention, FIG. 2 is a side view of essential parts of the embodiment, FIG. 3 is a block diagram showing the circuit configuration of the embodiment, and FIG. 4 is a flowchart showing the operation of the same embodiment, FIG. 5 is a plan view showing a different embodiment of the present invention, FIG. 6 is a plan view showing a conventional disk loading mechanism, and FIG. 7 is a diagram of the conventional example of FIG. 6. FIG. 4 is a side view showing the loading operation step by step. 1... Chassis, 2... Turntable, 3...
Disk insertion slot, 4... Conveyance roller, 5... Support member, 6... Disk, 6a... Center hole, 7... Stopper pin, 8... 8cm disk, 8a, 12a.
. . . Evaporated portion of disk, 12 . . 12 cm disk, 21 . . LED of detection sensor, 22 . . Light receiving part of detection sensor, 23 .
Support shaft, 23b...gear, 24...stopper pin. 31... Control means, 32... Drive motor. A: first end sensor, B: first width sensor, C
...Central sensor, D...Second width sensor, E...
Second end sensor, H...insertion detection sensor. Figure 1 Figure Figure 4-〇0 Figure Figure 5 Figure Figure Figure

Claims (1)

[Claims] A chassis, a turntable provided at the center of the chassis, a disc insertion slot provided at the front of the chassis, and a disc insertion slot provided between the turntable and the disc insertion slot and inserted from the disc insertion slot. A transport roller that pinches the disc and rotates to transport the disc onto the turntable, a drive motor that drives the transport roller, and multiple motors installed along the disc transport path from the disc insertion slot to the turntable. Based on the disc detection sensor and the combination pattern of detection and non-detection of the disc detection sensor, it is determined whether or not a disc has been inserted from the disc insertion slot, and when it is determined that the disc has been inserted, the drive motor is activated and Based on the pattern of combinations of detection and non-detection by the disk detection sensor from the time of detection of insertion until a set arbitrary time elapses, it is determined whether or not the disk has been inserted to the position where it is held between the transport rollers. and control means for continuing the operation of the drive motor when it is determined that the gripping position is within the set time, and stopping the drive motor when it is determined that the gripping position is not within the set time. A disc loading mechanism characterized by: