JPH03134856A - Disk loading mechanism - Google Patents

Abstract

PURPOSE:To precisely discriminate and eject an 8cm CD adaptor and to protect a player by arranging plural detection sensor groups which take a detection mode or an undetection mode with the aid of making them closely contact with a carrying means. CONSTITUTION:Five detection sensor groups are disposed on an inserting port 3 side by making them closely contact with a driving roller 4 and the gap between the outside sensors A and E is set a little wider than the diameter of an 8cm CD. The detection sensor groups A-E issue a 12cm CD mode and 8cm CD mode command and hold and release the attraction of a solenoid. Simultaneously, they issue a loading and ejecting command to a loading motor and the driving roller 4 is rotated in normal and reverse directions. Then, when the CD which is inserted is the 8cm CD, stopper arms 12 and 12 are attracted and held by the solenoid and the attraction of the solenoid is released when it is a 12cm CD. Thus, when only the adpator for a 8cm CD is erroneously inserted, it is ejected without being clamped and mechanism such ass a pickup is protected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc loading device for loading a disc on which optical signals are recorded into a device, and in particular, the present invention relates to a disc loading device for loading a disc on which optical signals are recorded into a device. This invention relates to an improvement of a disk loading mechanism that detects a single adapter that fits a disk in a fixed path.

[Prior Art] Conventionally, a CD player that reproduces a digital signal recorded on a compact disc (hereinafter referred to as a CD) is equipped with a disc loading mechanism that holds the CD and loads it into the player.

Conventional examples of such disc loading mechanisms include a type in which a disc holder that can be opened and closed is simply opened and the disc is mounted on the turntable, and a disc is placed on a slider that can move back and forth and is mounted on the turntable. Slide loading types are known.

Around the same time, CD players, as well as in-vehicle audio equipment, have been under development. However, in the case of in-vehicle audio equipment, with the disc loading mechanism as described above, it is difficult to load the disc due to vibrations during driving.

Therefore, a disk loading mechanism as shown in FIG. 6 has been proposed.

That is, in the chassis 1 of the CD player, the drive roller 4 is arranged on the insertion opening 3 side of the turntable 2. As shown in FIG. 7, the drive roller 4 and the supporting member 5 disposed opposite each other support the disk 6 inserted from the insertion slot 3.
The drive roller 4 is rotated to transport the disc 6 to the turntable 2. At this time, the front outer edge of the disk 6 comes into contact with the positioning guides 7 provided at two locations in front of the conveyance path.
The center hole 6a of the disk 6 is positioned above the turntable 2. After that, the conveying roller 4 is lowered by an elevating means (not shown), and the disk 6 is thereby lowered.
is lowered onto the turntable 2'' and is clamped by a clamping means (not shown) (playing state).

According to the conventional example described above, it is possible to easily mount the disc 6 on the turntable 2 simply by inserting it through the insertion slot 3.

On the other hand, in recent years, with the diversification of consumer needs, in addition to the existing 12cm standard CD, small-diameter 8cm CDs, so-called single CDs, which are equivalent to 17cm single analog discs, have been introduced. has been manufactured and is widely used. However, in the conventional example mentioned above, only 12cm CD was supported, so if you want to use 8cm CD, you need to use a dedicated adapter for 8cm CD.
cmCD], I had no choice but to use it after making it similar to the 2 cm disc standard.

Therefore, the following drawbacks have been pointed out in the prior art described below.

That is, if only an 8cm CD adapter was inserted by mistake, the eject signal would not be emitted and the adapter would enter the player, causing damage to the pickup and the like.

[Problems to be Solved by the Invention] As described above, in the prior art, it has not been possible to reliably identify a 3cm CD adapter.

The disc loading mechanism of the present invention was proposed to solve the problems of the prior art as described above, and its purpose is to eject an 8cm CD adapter without clamping it when inserted. The objective is to provide an excellent disc loading mechanism that protects mechanisms such as pickups.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the disc loading mechanism of the present invention takes a detection mode or a non-detection mode in proximity to a conveying means for loading a disc onto a turntable. A detection sensor group is arranged, and this detection sensor group is arranged in a gap between a first detection sensor group and this first detection sensor group having an interval slightly shorter than the diameter of the large diameter disk, and the detection sensor group is arranged in a gap between the first detection sensor group and the first detection sensor group, which has an interval slightly shorter than the diameter of the large diameter disk. , and when the first detection sensor group takes the detection mode and the second detection sensor group takes the non-detection mode at the same time, the insert , a detection sensor group that determines that the adapter is an adapter that adapts a small-diameter disc to a large-diameter disc.

The disc loading mechanism of the present invention is as follows:
It works as follows.

That is, when a large-diameter disk is inserted, the first detection sensor group, which has an interval slightly shorter than the diameter of the large-diameter disk, and the second detection sensor group, which is arranged in the gap, perform detection. take the mode. At this time, the detection sensor group determines that the inserted object is a large-diameter disk, and issues a loading command for the large-diameter disk to the transport means.

On the other hand, when a small-diameter disk is inserted, at least one location in the first detection sensor group takes a non-detection mode. In this case, the detection sensor group determines that the inserted object is a small-diameter disk, and issues a command to the transport means to load the small-diameter disk.

Further, if a single adapter is inserted by mistake, the first detection sensor group takes the detection mode and at the same time the second detection sensor group takes the non-detection mode. That is, the first detection sensor group takes the detection mode by the outer peripheral edge of the adapter, but the second detection sensor group, which has an interval shorter than the diameter of the small-diameter disk, has a hole in the center of the adapter for fitting the small-diameter disk. Since it is formed, it does not take detection mode. In such a case, the detection sensor group can determine that the inserted object is a single adapter.

Therefore, in the present invention, when a single adapter is inserted into the device, the detection sensor group can determine this, give an eject command to the transport means, and eject the adapter. Therefore, the safety of the device is improved without damaging the pickup or the like.

[Embodiment] An embodiment of the disc loading mechanism of the present invention as described above will be explained in detail based on the drawings.

Note that the same reference numerals are given to the same members as those in the prior art, and the description thereof will be omitted.

That is, as shown in FIG. 1, a group of five detection sensors are arranged as detection means on the insertion opening 3 side in close proximity to the drive roller 4. These detection sensor groups include the two outermost sensors A and E, and the outer sensor AS.
A central sensor C located approximately in the center of E, and an outer sensor A
, E and a central sensor C. Regarding the positional relationship of each detection sensor, in the left-right direction, the interval between outer sensors ASE is 8 cm CD.
It is set slightly wider than the diameter of the Also, sensor A
is further away from the center of the turntable 2 than the sensor E, and is set so that when a 12cm CD is set on the turntable 2, the outer circumference of the 12cm CD does not reach the end sensor A.

In addition, each sensor A to E of these detection sensor groups is
As shown in the figure, it is composed of a pair of LEDIOs and a light receiving sensor 11, and the light from the LEDIO is transmitted to the light receiving sensor 11.
1, it senses that there is no light shielding object in the gap between the two and enters a non-detection mode. On the other hand, when the light from the LEDIO does not reach the light receiving sensor 11, it is sensed that there is a light shielding object in the gap between the two, and the detection mode is set.

Furthermore, the detection sensor groups A-E are capable of detecting 12 cm by using pattern recognition of the sensing timing in the detection mode.
CD mode φ3cm A CD mode command is issued to hold and release the adsorption of a solenoid (not shown), and a loading/eject command is given to the loading motor so that the drive roller 4 rotates in forward and reverse directions. .

By the way, the solenoid is connected to the stopper arm 12.12 via a rotatable position regulating plate (not shown). When the CD to be inserted is an 8 cm CD, the solenoid suction-holds the stopper arm 12.12, and when the CD to be inserted is a 12 cm CD, the solenoid is released from suction, and the drive roller 4 moves the CD to the back of the device. It is designed to send up to

On the other hand, on the back side of the turntable 2, there is a gear 12 at the base end.
The stopper arm 12.12 connected at b is connected to the support shaft 12.
It is arranged to rotate symmetrically about a.

Further, the stopper arm 12.12 is provided with a stopper pin 13 at its tip. And stopper arm 12
．． 12 is positioned at a position where the CD is locked on the turntable 2 via a position regulating plate that is operated by adsorption and release of a solenoid.

Furthermore, in this embodiment, when the CD suction is completed, the chucking operation plate (not shown) is activated, and the microswitch detects the operation completion position of the chucking operation plate (not shown), and the CD is removed. The loading operation is completed,
The play motion is started.

The operation of this embodiment having the above configuration is as follows.

a. Loading start 0 After the power is turned on, as shown in Fig. 3, the detection sensor group A-E
When at least one of the central sensor C or intermediate sensor D senses an insert and enters the detection mode, a loading command is issued and the drive roller 4 rotates to draw the insert into the apparatus. At the same time, a gcmcD mode command is issued to the solenoid, the solenoid performs a suction operation, rotates the position regulating plate, and moves the stopper arm 12 to 8c.
Regulates to mCD position.

0.126mCD judgment By the way, during the loading operation, as shown in Figure 4,
When outer sensors A and E are in detection mode at the same time,
The insert is determined to be a 12 cm CD. At this time, the detection sensor issues a 1.2 cm CD mode command to the solenoid, the attraction of the solenoid is released, and the regulation of the position regulation plate is released.

Therefore, the stopper pin 13 is pressed against the insert and the collar arms 12.12 are rotated symmetrically by the gear 12a. Therefore, the stopper pin 13 is 8cmC.
Move backward from position D.

1 c, 8cm CD adapter standalone judgment Also, as shown in Figure 5, if the outer sensors A and E take the detection mode and the remaining detection sensors B, C, and D take the non-detection mode, the insert It is determined that it is a single 8cm CD adapter 14. In other words, since the 3cm CD adapter 14 has an opening for fixing an 8cm CD near the center, the three central detection sensors may be in non-detection mode at the same time, but in the case of a 12cm CD, the detection sensor It is impossible for BXC and D to be in non-detection mode at the same time. Therefore, in the case of the mode pattern shown in item 1, an eject command is issued to the loading motor, the drive roller 4 is reversed, and the 8 cm CD adapter 14 is ejected from the insertion slot 3.

d. Judgment of completion of 8cm CD suction By the way, during the loading operation in the 8cmCD mode, only the central sensor C takes the detection mode, and the other detection sensor A
, B, D, and E are all in the non-detection mode, and if the insert is in contact with the stopper pin 2 13 after a certain period of time, the insert is
It is determined that it is mCD, and the completion of suction of 3 cm CD is detected, and a clamping operation is performed.

e, 12cmcD suction completion judgment On the other hand, when the solenoid is released and the stopper pin 13 retreats by a certain stroke due to the pressing force of the insert,
The stopper arm 12 engages with the position regulating plate and positions the stopper pin 13 at the 12 cm CD position. and,
If an insert comes into contact with the stopper pin 13 after a certain period of time with only the outer sensor A in the non-detection mode and the other outer sensor E and center sensor C in the non-detection mode, this insert is determined to be a 12cm CD, and 1
Detects completion of suction of 2cm CD and performs clamping operation.

In addition, when using the SCmCD adapter 14,
Depending on the adapter, a slit 14a is provided near the center, so there is a risk that the light from the LED lo may leak through the slit 14a, causing the intermediate sensors B and D to enter the non-detection mode. Therefore, the modes of the intermediate sensors B and D are ignored, and the completion of suction of the 12 cm CD is determined only by the detection sensor ASCSE.

Further, the disc loading mechanism of the present invention is not limited to the above-described embodiments, and the number of detection sensors arranged can be selected as appropriate.

As described in "Effects of the Invention" (2), the disk loading mechanism of the present invention has a simple configuration in which a plurality of detection sensor groups that take detection mode or non-detection mode are arranged close to the conveying means. , it is possible to provide an excellent disc loading mechanism that can electrically accurately identify and eject an 8cm CD adapter and protect the player.

[Brief explanation of the drawing]

1 and 3 to 5 are a plan view of this embodiment, FIG. 2 is a side view of the main part of this embodiment, and FIGS. 6 and 7 are a plan view and a side view of a conventional example. . 1-...Chassis, 2...Turntable, 3...
・Insertion 3 4 Port, 4... Drive roller, 5... Support part shrine, 6...
Disk, 7...Guide, 10...LED, 11.
...Light receiving sensor, 1.2...Stopper arm, 13.
...Stopper pin, 14...8cm CD adapter,
A-E...Detection sensor.

Claims (1)

[Scope of Claims] A disc loading mechanism comprising a transport means for loading a disc onto a turntable, and a detection sensor group that takes a detection mode or a non-detection mode in proximity to the transport means, the detection sensor group comprising: A first detection sensor group having an interval slightly shorter than the diameter of the large-diameter disk, and a second detection sensor group arranged in a gap between the first detection sensor groups and having an interval set to be shorter than the diameter of the small-diameter disk. and a single adapter whose insert adapts a small-diameter disk to a large-diameter disk size when the first detection sensor group takes a detection mode and the second detection sensor group takes a non-detection mode. A disk loading mechanism is characterized in that it is a group of detection sensors that determine that.