JPH0418118Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a disc detection device for a video disc player or the like.

[Summary of the idea]

The present invention provides a disk detection device in which a disk can be placed between a first position where the disk is attached to and removed from the housing and a second position where the disk waits after being attached to a predetermined turntable. A movable carrier, a guide means for positioning the disc at a predetermined position on the carrier, a finger hole into which a finger can be inserted when removing the disk mounted on the carrier, and detecting the presence or absence of a disk through the finger hole. A detecting means is provided to detect the disc through the finger hook hole, thereby reducing the number of holes formed in the carrier and making the appearance cleaner.

[Conventional technology]

3 and 4 show the configuration of a disc detection device in a conventional optical video disc player capable of playing not only video discs but also digital audio discs. In these figures, 1 is a carrier, which is movable with respect to the housing 31. Reference numeral 2 denotes a guide consisting of a step or a protrusion that guides the outer peripheral edge of the video disk 21 having a diameter of 12 inches and positions the video disk 21 at a predetermined position. 3 is a mounting surface on which the video disc 21 is mounted. 4 is a finger hook recess formed on the left and right sides of the carrier 1;
When attaching and detaching the video disk 21 from the carrier 1, it is possible to insert a finger therein. 5 guides the outer peripheral edge of the video disk 22 having a diameter of 8 inches;
A guide 6 is a mounting surface on which the video disc 22 is placed. Reference numeral 7 denotes a finger-rest recess into which a finger can be inserted when attaching or detaching the video disc 22 from the carrier 1. Reference numeral 8 denotes a guide consisting of a step or protrusion that guides the outer peripheral edge of the digital audio disk 23 having a diameter of about 4.7 inches and positions the digital audio disk 23 in a predetermined position. Reference numeral 9 carries the digital audio disk 23. This is the mounting surface. Reference numeral 10 denotes a finger-rest recess into which a finger can be inserted when attaching or detaching the digital audio disk 23 from the carrier 1. Reference numerals 11, 12, and 13 are holes formed in the mounting surfaces 9, 6, and 3, respectively, and light is emitted from the detection means 24, 25, and 26, which are composed of a light emitting diode and a light receiving element fixed to the substrate 27.
Further, the light reflected by the disks 21, 22, and 23 can freely pass through. 14 is an opening that allows a pickup (not shown) to move in the radial direction of the disk. Reference numeral 28 is a motor for the video disk, which rotates the turntable 29. 30 is a clamper that clamps the disk.

Then, the carrier 1 is pulled out from the housing 31, and the disks 21, 22, 23 are placed on the mounting surfaces 3, 6, 9.
When any one of the disks is placed, each disk is guided by each guide 2, 5, and 8 and is always positioned at a predetermined position. The carrier on which one of the disks 21, 22, and 23 is mounted is moved into the housing 31 and positioned directly above the turntable 29 (FIG. 4a). At this point, Carry 1 was temporarily stopped,
The presence or absence of reflected light of the light emitted from the detection means 24, 25, and 26 is detected. When the disk 21 is attached, the detection means 24, 25, 26
However, when the disk 22 is attached, the detection means 24 and 25 receive the reflected light, and when the disk 23 is attached, only the detection means 24 receives the reflected light, so the detection means 24, 25, 26 Which disk is attached is detected from the output signal.

Video disks 21 and 22 are installed.
If it is a video disc, the motor 28 and turntable 29 for the video disc, and if it is a digital audio disc 23, the motor and turntable for the digital audio disc (not shown), the lower motor and turntable of the carrier 1. can be switched respectively. After such switching is completed, the carrier 1 is lowered. As a result, the disk is placed on a predetermined turntable and clamped by the clamper 30. Further, the carrier 1 does not interfere with the rotation of the disk, and the detection means 2
It is lowered to a position where it does not come into contact with 4, 25, 26,
It waits there (Figure 4b).

[Problem that the invention attempts to solve]

In this way, in the conventional device, it is necessary to lower the carry 1 to a position where it does not contact not only the disk but also the detection means 24, 25, 26, so the distance between the detection means 24, 25, 26 and the disk is The disadvantage is that the length increases, the S/N ratio of the detection signal deteriorates, and accurate detection becomes impossible. Further, detection holes 11, 12, and 13 had to be specially provided, which was unfavorable in terms of appearance.

[Means for solving problems]

1 and 2 show the configuration of the disk detection device of the present invention, and parts corresponding to those in FIGS. 3 and 4 are denoted by the same reference numerals, and detailed description thereof is omitted. do. In the present invention, the mounting surface 6 has a finger hole 41, and the mounting surface 3 has a finger hole 42.
In addition, a finger hook recess 43 is formed near the outer periphery of the carrier 1. Then, by inserting a finger into the finger hook hole 41, the outer periphery of the disk 23 can be grasped with the finger. Similarly, the outer periphery of the disk 22 can be gripped with fingers through the finger hook holes 42, and the outer periphery of the disk 21 can be gripped with fingers through the finger hook recesses 43. Furthermore, the portion 4 divided by the dividing line 45 of the carrier 1
4 is movable relative to other parts.
Only two detection means 24, 25 are provided.
The other configurations are the same as those in FIGS. 3 and 4.

[Effect]

The effect will now be explained. The carrier 1 has a disk 2 in the position pulled out from the housing 31.
1, 22, or 23 can be placed. At this time, each disk is always positioned at a predetermined position with respect to the carrier 1 by the guides 2, 5, and 8. When the carrier 1 carrying the disk is pushed into the housing 31, a loading mechanism (not shown) is operated, and the carrier 1 is then automatically moved toward the interior of the housing 31.

When the carrier 1 is moved to the detection position shown in FIG. 1a and FIG. It is made to be located. Such a detection position is, for example, a potentiometer linked to the movement of the carry 1,
Accurate detection is possible using a switch or the like (none of which is shown) that is activated when the object reaches the detection position.

When the carrier 1 is located at the detection position, the presence or absence (intensity may be used) of reflected light from the detection means 24 and 25 is detected. Digital audio disk 23
When the video disk 21 and 22 are placed, only the detection means 24 receives the reflected light, and when the video disks 21 and 22 are placed, both the detection means 24 and 25 receive the reflected light. That is, at this detection position, the opening 14
is used as a hole for detecting the presence or absence of a disk.

After the digital audio disk and the video disk have been distinguished, the carrier 1 is further moved inside the housing 31 and temporarily stopped at the disk pickup position shown in FIGS. 1b and 2b. It is not necessarily necessary to temporarily stop the disk if it is the same type as the previously detected and stored disk.) This disk-up position can also be detected by a predetermined potentiometer, switch, etc. In this disk up position, the center holes of the video disks 21 and 22 are located directly above the video disk turntable 29,
Further, the detection means 24 and 25 are connected to the finger holes 41 and 42, respectively.
It is located below the . Here, the presence or absence of reflected light from the detection means 24 and 25 is detected again. When the video disk 22 is placed, only the detection means 24 receives the reflected light, and when the video disk 21 is placed, both the detection means 24 and 25 each receive the reflected light. As a result, it is determined whether the 8-inch video disc 22 or the 12-inch video disc 21 is placed here. That is, in the present invention, the two detection means 24 and 25 make it possible to identify three disks with different diameters. Of course, the number of detection means may be one, and the detection may be performed at three positions.

Thereafter, the carrier 1 is lowered relative to the housing 31, and the video disc 21 or 22 is placed on the turntable 29 and clamped by the clamper 30. Therefore, the turntable and the video disk 21 or 22 can be rotated together by the motor 28. At this time, the carrier 1 is lowered to a position where it does not come into contact with the disks 21 and 22, as shown in FIG. 2c, and is waiting there. In this standby position, the detection means 24, 25 are inserted into the finger holes 41, 42, respectively. Therefore, the detection means 2
4 and 25 can be placed near the disk. Further, the video disks 21 and 22 may be identified at this standby position.

When the digital audio disk 23 is placed, the portion 44 divided by the dividing line 45 is moved further rearward, leaving the other portions. A digital audio disk motor and turntable are arranged behind the video disk motor 28 and turntable 29 (not shown). The portion 44 is moved to a disk up position corresponding to the motor and turntable for this digital audio disk, and after being stopped there, the video disk 2
1 and 22, it is lowered to the standby position.

〔effect〕

As described above, the present invention provides a disk detection device in which a disk can be placed, and has two positions: a first position where the disk is attached to and removed from the housing, and a second position where the disk waits after being attached to a predetermined turntable. a guide means for positioning the disc at a predetermined position on the carrier; a finger hole into which a finger can be inserted when removing the disk mounted on the carrier; Since a detecting means for detecting the presence or absence of the disc is provided and the detecting means detects the disc through the finger hole, the number of holes formed in the carrier can be reduced and the appearance can be made neat. Furthermore, when the detection means is inserted through the finger hole, the detection means can be placed close to the disk, and the S/N of the detection signal can be improved. Therefore, even if there are fingerprints, scratches, dirt, etc. on the disk and the reflectance varies, accurate detection is possible. Furthermore, the device can be made thinner.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the disk detection device of the present invention.
FIG. 2 is a side sectional view thereof, FIG. 3 is a perspective view of a conventional disk detection device, and FIG. 4 is a schematic side sectional view thereof. 1...Carry, 2,5,8...Guide, 3,
6, 9... Placement surface, 4, 7, 10... Finger rest recess,
11, 12, 13...hole, 14...opening, 2
1, 22... Video disk, 23... Digital audio disk, 24, 25, 26... Detection means, 27... Board, 28... Motor, 29...
...Turntable, 30...Clamper, 31...
Housing, 41, 42...Finger hole, 43...Finger hook recess, 44...Part, 45...Parting line.

Claims (1)

[Claims for Utility Model Registration] (1) A disk can be placed in a first position where the disk is attached to and removed from the housing, and a second position where the disk is placed on standby after being attached to a predetermined turntable. a carrier movable between positions, a guide means for positioning the disc at a predetermined position on the carrier, a finger hole into which a finger can be inserted when removing the disc placed on the carrier; a disk detection means that is fixed at a predetermined position within the housing corresponding to the position of the finger hole when the disc is in the second position, and optically detects the presence or absence of the disk through the finger hole. A disk detection device comprising: (2) The disk detecting device according to claim 1, wherein the disk detecting means is inserted into the finger hole when the carrier is in the second position. (3) The carriage is capable of mounting disks with different diameters, the guide means positions the disks with different diameters at predetermined positions on the carrier, and the disk detection means is arranged to place the disks with different diameters at predetermined positions on the carrier, and the disk detection means moves the disks with different diameters through the finger hole. Registration of a utility model characterized in that the presence or absence of the disk with a large diameter is detected, and the presence or absence of the disk with a small diameter is detected through a pick-up or an opening that allows relative movement of the turntable with respect to the carry. A disk detection device according to claim 1 or 2. (4) The number of holes used for detecting the presence or absence of the disk is equal to the types of the disks having different diameters and is greater than the number of the disk detection means, and the number of holes used to detect the presence or absence of the disk is equal to the number of the disk detection means, When the carriage is in a third position between the two positions, the disc detecting means is made to correspond to one of the holes to detect the presence or absence of the disc of the first diameter, and the carriage is located in the first position. and the second position, the disk detecting means is caused to correspond to one of the holes different from that in the third position to detect the disk of the second diameter. 3. A disk detection device according to claim 1, 2, or 3, characterized in that the disk detection device detects the presence or absence of a utility model.