JPH0538429Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a disk positioning device for setting two types of disks with different outer diameters at predetermined positions above a turntable.

(Prior art) In conventional disc playback devices, for example, the outer diameter is 12
The turntable is structured so that only one type of disc (cm) can be used, and the turntable is positioned upward by the front edge of the disc coming into contact with two left and right positioning pins fixed to the chassis.

In recent years, in addition to the 12cm disk mentioned above, discs with an outer diameter of 8cm have been introduced.
discs are also commercially available, and this regeneration is carried out by using an adapter that makes an 8 cm disc the same outer diameter as a 12 cm disc.

(Problem that the invention aims to solve) Since an adapter is required to play an 8cm disc (hereinafter referred to as a small diameter disc),
This is inconvenient as it may be lost when not in use.

The purpose of this invention is to propose a positioning device that can accurately position not only a normal 12cm disk (hereinafter referred to as a large-diameter disk) but also a small-diameter disk.

(Means for Solving the Problems) The disk positioning device of this invention includes rotatably provided left and right positioning levers, a switching lever, a power member for rotating the switching lever, and each positioning lever. The provided positioning pin, the switching pin provided on the switching lever,
It has an engagement hole provided on the positioning lever to engage with the switching pin, and a stationary side positioning pin provided so as to come into contact with the front peripheral edge of the large-diameter disk above the turntable, and the engagement hole includes: As the switching lever rotates as the power member operates, the positioning levers rotate in opposite directions, and the positioning pin is brought into contact with the front periphery of the small diameter disk above the turntable in front of the fixed side positioning pin. It is formed so that it can be set. In addition, the left and right positioning levers and switching levers that are rotatably provided, a power member that rotates the switching levers, a positioning pin provided on each positioning lever, a switching pin provided on the switching lever, and a switching pin. the left and right positioning levers rotate in opposite directions when the switching lever rotates as the power member operates. The positioning pin may be set in a position where it abuts the front peripheral edge of the large-diameter disk or the small-diameter disk above the turntable.

(Function) Distinguish between a large-diameter disk and a small-diameter disk. For example, the power member operates based on a command from a sensor, etc., the switching lever rotates, the left and right positioning levers rotate in opposite directions, and the left and right positioning levers rotate in opposite directions. The positioning pins are set according to the respective operating positions of the power members.

Depending on the operating position of the power member, the front peripheral edge of the large-diameter disk comes into contact with the left and right fixed-side positioning pins, or the small-diameter disk is brought into contact with the left and right positioning pins set in front of the fixed-side positioning pins. A large-diameter disc or a small-diameter disc is located above the turntable, with the front peripheral edge of the disc in contact with the turntable.
Positioned.

Further, according to the second aspect of the present invention, the left and right fixed side positioning pins abut on the front peripheral edge of the large diameter disc or the small diameter disc depending on the respective positions of the power member, so that the large diameter disc or the small diameter disc is positioned, respectively. be done.

(Example) Next, an embodiment of this invention will be explained based on the drawings.

Figures 1 and 2 are plan views of the main parts of the disk regeneration device using large-diameter disks and small-diameter disks, respectively, and Figure 3 is a front view of the main parts of Fig. 1, respectively. ,Indicated.

A door 3 is provided in the disk insertion slot 2 of the chassis 1, and a transfer mechanism 7 consisting of a transfer motor 4, a transfer roller 5, and a transfer gear train 6 (transmits the rotation of the transfer motor 4 to the transfer roller 5 at a reduced speed) , a turntable motor 9 and a turntable 10, an optical pick-up 11, and a pick-up feed mechanism 12, which are mounted on the loading chassis 8 and provided on the bottom plate of the chassis 1 (not shown), are connected to the loading chassis 8. 8 is configured to be movable up and down by a lifting mechanism (not shown) (which engages and disengages from the transfer gear train 6).

A clamp plate 14 equipped with a clamp head 13 located above the turntable 10 is pivotally supported to the shaft 1 by fulcrum shafts 15, 15, and is lowered in conjunction with the lowering operation of the lifting mechanism, and is at the lowered position. The clamp head 13 has a large diameter disk D ₁
Or a clamp mechanism 16 configured to press the small diameter disk D ₂ onto the turntable 10 by the force of a spring.
is provided.

Large diameter disk above turntable 10
The positioning of D ₁ is performed by the left and _right fixed side positioning pins 31 and 32 fixed to the clamp plate 14 as shown in FIG. , 19, a switching lever 23 supported by a fulcrum pin 22, a power member 24 such as a solenoid for rotating the switching lever 23, and a power member 24 such as a solenoid for rotating the switching lever 23; Positioning pin 2 provided in 21
5, 26, a switching pin 27 provided on the switching lever 23, engagement holes 28, 29 that are dogleg-shaped in plan view provided on the respective positioning levers 20, 21 to engage with the switching pin 27, and the switching lever; 23 and a spring 30 that biases the spring 23 counterclockwise (FIG. 2).

When the power member 24 is not energized in the state shown in FIG.
8 and 29 hold the respective positioning levers 20 and 21 at the extreme counterclockwise position and the extreme clockwise position, and the positioning pins 25 and 26 hold the positioning levers 20 and 21 at the fixed side positioning pin 3.
A small diameter disk D ₂ is set in front of the turntable 1 and 32 and whose front peripheral edge is in contact with the positioning pins 25 and 26 at this set position.
Positioned above 0.

In the set position above, the left and right positioning levers 2
0 and 21, the switching pin 27 engages in a position where it is difficult to rotate even when pushed by the small diameter disk D ₂ , that is, in a part where the left and right engagement holes 28 and 29 are approximately parallel to the front and back direction of insertion. positioning lever 20 or 2
1 by the positioning pin 25 or 26, the engagement holes 28 and 29 push the switching pin 27 to the left and right, so that the switching pin 27 is in a position where it cannot move. There is.

The sensors S ₁ to _{S 5} placed in the disk insertion slot 2 determine whether the newly inserted disk is a large-diameter disk.
When D ₁ , the power member 24 is
The actuator 24a is energized from the position shown in FIG.
, and rotate the switching lever 23 clockwise (Fig. 1 or 4).

In FIG. 2, the switching pin 27 is engaged with the engagement holes 28 and 29 located approximately parallel to the insertion front and back direction as described above, so the engagement pin 27 is engaged by the rotation of the switching lever 23. While sliding in the matching holes 28 and 29,
By rotating the left positioning lever 20 clockwise and the right positioning lever 21 counterclockwise, the positioning pins 25 and 26 are moved back and set to the position shown in FIG. 1, and the disk is inserted from the disk insertion slot 2. The front periphery of the large diameter die D ₁ is fixed side positioning pin 31,
32.

The sensors S ₁ to _{S 5} are inactive and in the inserted state when the light from the light emitting element E ₁ attached to the lower substrate 35 attached to the chassis 1 is received by the light receiving element E ₂ attached to the upper substrate 36. When the light is blocked by the large-diameter disk D ₁ or the small-diameter disk D ₂ , it becomes operational, and depending on whether or not these sensors S ₁ to _{S 5} operate, it is possible to start inserting the disk, determine the disk type, and determine the upper part of the turntable 10. Setting in position, disc ejection, etc. are detected.

That is, in the large diameter disk D ₁ , the central sensor S ₃
The insertion of the disk is detected by the operation of , and the transfer motor 4 is driven in the disk retraction direction, and the large-diameter disk D ₁ is sandwiched between the upper guide plate 37 and the transfer roller 5 and is directed upward of the turntable 10 . I'm drawn in.

By operating the left and right outer sensors S ₁ and S ₅ , it is identified as a large diameter disk D ₁ , and the power member 2
4 is operated, and the positioning mechanism 17 is switched to the position shown in FIG.

The left and right side plates 1a and 1b of the chassis ₁ restrict the deviation of the large diameter die D1 in the left and right direction, and when the turntable 10 reaches the upper position, the left and right outer sensors _S1 and _S5 become inactive. Transfer motor 4
is stopped, and the large diameter disc D ₁ is accurately positioned on the turntable 10 by the fixed side positioning pins 31 and 32.
is positioned above.

Then, the lifting mechanism operates to lower the loading chassis 8, and the large diameter disk _D1 is transferred to the turntable 10, and the clamp plate 14 is lowered and clamped.

After completing the predetermined regeneration operation, the clamp plate 14
The loading chassis 8 rises, the transfer motor 4 is driven in the disk ejection direction, and the transfer roller 5
When the large-diameter disk D ₁ reaches the position where it comes off (the same position as the disk insertion position), the left and right outer sensors S ₁ and S ₅ become inactive and the transfer motor 4 stops.

In the case of a small-diameter disk _D2 , the start of insertion is detected by the operation of any one of the center sensor _S3 , the left sensor _S2 , or the right sensor _S4 , and the operation of either the left or right outer sensor _S1 or _S5 . If one or both remain inactive, it is determined that it is a small diameter disk _D2 , and both left and right sensors _S2 and _S4 become inactive, indicating that the disk is located above the turntable 10. The completion of ejection is detected when the left and right sensors S ₂ and S ₄ become inactive during the ejection operation.

In other embodiments in which the main part plan views of the large-diameter disk D ₁ and the small-diameter disk D ₂ are shown in use in FIGS. 4 and 5, the positioning pins 40 provided on the positioning levers 20 and 21, respectively, are and 41 indicate a positioning mechanism 43 that can position the large-diameter disk D ₁ or the small-diameter disk D ₂ above the turntable 10 .

In each of the above embodiments, both the large diameter disc D ₁ and the small diameter disc D ₂ can be accurately positioned above the turntable 10 without using anything such as an adapter, which is extremely convenient. .

(Effects of the invention) Since the disk positioning mechanism according to the invention is constructed as described above, it has the following effects.

(1) For those using fixed side positioning pins,
In the case of a large diameter disc, the front peripheral edge touches the fixed side positioning pin, and in the case of a small diameter disc,
The front peripheral edge abuts the positioning pin of the positioning lever, and the large-diameter disk or small-diameter disk is positioned above the turntable, respectively.

(2) When the front peripheral edge of the large-diameter disc or small-diameter disc comes into contact with the positioning pin of the positioning lever,
Each is positioned above the turntable.

In this way, the large diameter disk or the small diameter disk can be positioned above the turntable, respectively, without the need for an adapter as in the past. Therefore, switching between the large diameter disk and the small diameter disk is extremely simple, and playback of two types of disks is possible at low cost.

[Brief explanation of the drawing]

The figures show an embodiment of this invention; FIGS. 1 and 2 are plan views of essential parts of a disc playback device showing the state of use of the disc in the first embodiment, and FIG.
FIGS. 4 and 5 are front views of the main parts of the figure, and FIGS. 4 and 5 are plan views of the main parts of the disc playback device in the second embodiment. 1... Chassis, 1a, 1b... Side plate, 2...
Disc insertion slot, 3... Door, 4... Transfer motor, 5... Transfer roller, 6... Transfer gear train, 7...
...Transfer mechanism, 8...Loading chassis, 9...
... Turntable motor, 10... Turntable, 11... Optical pick-up, 12... Pick-up feed mechanism, 13... Clamp head, 14...
... Clamp plate, 15 ... Fulcrum shaft, 16 ...
Clamp mechanism, 17, 43... Positioning mechanism, 1
8, 19, 22... Fulcrum pin, 20, 21... Positioning lever, 23... Switching lever, 24... Power member, 24a... Operator, 25, 26, 40,
41... Positioning pin, 28, 29... Engaging hole,
30... Spring, 31, 32... Fixed side positioning pin, D ₁ ... Large diameter disc, D ₂ ... Small diameter disc,
S ₁ , S ₂ ,...S ₅ ...sensor, E ₁ ...light emitting element, E ₂
……Light receiving element.

Claims (1)

[Claims for Utility Model Registration] (1) Left and right positioning levers that are rotatably provided, a switching lever, a power member that rotates the switching levers, a locating pin provided on each positioning lever, and a switching lever. It has a switching pin provided on the lever, an engagement hole provided on the positioning lever to engage with the switching pin, and a fixed side positioning pin provided so as to come into contact with the front periphery of the large diameter disk above the turntable. The engagement hole allows the positioning levers to rotate in opposite directions when the switching lever is rotated in conjunction with the operation of the power member, and the positioning pin is inserted into the small diameter disk above the turntable in front of the fixed side positioning pin. 1. A disk positioning device, characterized in that it is configured to be set in a position where it abuts the front peripheral edge of the disk. (2) Left and right positioning levers and switching levers that are rotatably provided, a power member that rotates the switching levers, a positioning pin provided on each positioning lever, a switching pin provided on the switching lever, and a switching lever. and an engagement hole provided in the positioning lever to engage with the pin, and the engagement hole allows the left and right positioning levers to rotate in opposite directions when the switching lever is rotated in conjunction with the operation of the power member. 1. A disk positioning device characterized in that the disk positioning device is formed so that the positioning pin can be brought into contact with the front peripheral edge of a large-diameter disk or a small-diameter disk above a turntable.