JPH117690A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk device capable of reducing the number of components and also capable of performing the sure detecting operation by making possible to detect the completion of positioning operations of both small diameter disk and large diameter disk by a common positioning detection member. SOLUTION: When the small diameter disk is positioned by pins 62a, 62b provided on a positioning slider 61, a positioning detection arm 56 is pushed by the small diameter disk DS and turned while taking a pin 61d as the fulcrum, then the positioning detection is completed. When the large diameter disk is transferred, the positioning slider 61 is pushed by the large diameter disk and moved to the direction Y1, but the positioning detection arm 56 is turned together with the movement at this time, and when the large diameter disk is positioned, the positioning detection arm 56 is turned counterclockwise while taking a shaft 4c as the fulcrum, then the positioning detection is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive in which large-diameter discs such as CDs and DVDs, and small-diameter discs such as SCDs are transferred to a rotary drive by a transfer means. The present invention relates to a disk device having a detecting means for detecting the fact.

[0002]

2. Description of the Related Art In an on-vehicle disk device or the like, both a large-diameter disk such as a CD or a DVD and a small-diameter disk such as an SCD can be inserted. It is positioned and can be clamped. As a disk device capable of positioning both a small-diameter disk and a large-diameter disk, Japanese Patent Publication No. 7-111804 has a stopper provided at a position where a small-diameter disk can be positioned on a rotary drive unit. Is disclosed, the stopper is moved by being pushed by a large-diameter disk when the large-diameter disk is introduced. In the present invention, both the small-diameter disk and the large-diameter disk can be positioned by one type of stopper.

[0003]

However, in a disk device in which both a small-diameter disk and a large-diameter disk are loaded,
It is necessary to detect that the disks of each diameter have been positioned on the rotary drive. By this detection operation, a disk clamping operation is performed, and in a disk device mounted on a vehicle, it is necessary to switch the disk drive unit that clamps the disk from a locked state to an elastic floating state by a damper or the like. However, the position of the peripheral edge of the disk is different between when the small-diameter disk is positioned on the same rotary drive unit and when the large-diameter disk is positioned. Therefore, conventionally, an optical detector or the like is provided at both the position shielded by the small-diameter disk whose positioning has been completed and the position shielded by the large-diameter disk whose positioning has been completed. The completion of positioning of both diameter disks was detected. However, in this case, since a plurality or a plurality of sets of detecting means such as the optical detector must be provided for the small-diameter disk and the large-diameter disk, the number of the detectors is increased, and thus it is required. The number of components increases, the cost increases, and the circuit becomes complicated.

The present invention has been made to solve the above-mentioned conventional problems, and a common positioning detecting member can detect the completion of positioning of a small-diameter disk and the completion of positioning of a large-diameter disk, thereby reducing the number of parts. It is another object of the present invention to provide a disk drive capable of performing a reliable detection operation.

[0005]

SUMMARY OF THE INVENTION The present invention provides a rotary drive for clamping a large-diameter disk (DL) and a small-diameter disk (DS), a head facing the disk clamped by the rotary drive, and a large-diameter disk. A transfer means for transferring both the disk and the small-diameter disk to the rotary drive unit; and a standby position for positioning the peripheral edge of the small-diameter disk (DS) when the center of the small-diameter disk (DS) reaches the rotary drive unit. A positioning member (61) which is moved from the standby position when a large-diameter disk (DL) is transported
When the small-diameter disk (DS) is positioned by the positioning member (61) at the standby position, the small-diameter disk (DS) is moved by a predetermined amount to become the first detection position. When the positioning member (61) moves from the standby position, the positioning member (61) moves together with the positioning member (61) and becomes the second detection position when the center of the large-diameter disk reaches the rotary drive unit. A detecting member (56) and the positioning detecting member (5);
6) when the first detection position is reached, and when the positioning detection member (56) reaches the second detection position, the positioning detection member (56) is moved to each of the detection positions. Power switching mechanism (B) started by movement
The power switching mechanism (B) performs a switching operation of the mechanism.

In the present invention, the positioning member (61) is provided which moves together with the positioning member (61), and the positioning member (61) is at the standby position, and the small-diameter disk ( When DS) is positioned, the small-diameter disk is pushed to move the positioning detection member (56) by a predetermined amount, and the first detection position at which the positioning of the small-diameter disk is completed. When the large-diameter disk (DL) is transferred, the positioning member (61) is moved from the standby position by being pushed by the large-diameter disk or by another mechanism. When the positioning member (61) moves until the large-diameter disk (DL) is positioned by the rotary drive unit, a positioning detection member (56) that moves together with the positioning member (61) is used to position the large-diameter disk. To the second detection position where the operation is completed.

When the positioning detection member (56) reaches the first detection position and reaches the second detection position, the power switching mechanism (B) is started, and the disk clamp is completed. In this case, the positioning detection member (5
6) when the first detection position is reached and when the second detection position is reached, the same switch or optical detector operates, or the first detection position and the second detection position Then, a separate switch or an optical detector operates, and the operation of the switch or the like starts the motor, and the power switching mechanism (B) starts.

Alternatively, the positioning detecting member (56)
There is provided a trigger member (54) that is moved by the positioning detection member (56) when the first detection position is reached and when the positioning detection member (56) reaches the second detection position. The power switching mechanism (B) may be switched to the starting state by the moving force of the trigger member (54).

When this trigger member is used, a positioning detection member (5) can be provided without providing a switch or an optical detector.
According to 6), the power switching mechanism (B) can be directly started. The power switching mechanism (B) is provided with a switching gear having a missing tooth portion, and the missing tooth portion faces the drive gear,
The switching gear may be rotated by the trigger member, and the switching gear and the driving gear may mesh with each other,
Alternatively, as in the illustrated embodiment, the switching gear having no tooth missing portion and the driving gear may be switched to a state in which they are engaged with each other by the trigger member.

In the above, the positioning detecting member (56)
A first connecting portion (57) between the first member and the trigger member (54);
A second connection between the positioning detection member (56) and the fixed portion (4), which allows rotation of the positioning detection member (56) about the first connection portion (57) within a predetermined range. A portion (56a) is provided with a third connecting portion (61d) between the positioning detection member (56) and the positioning member (61), and the positioning detection member (56) pressed by the small-diameter disk (DS) is provided. When the positioning member (61) is rotated from the standby position by rotating about the third connecting portion (61d) as a fulcrum, and the positioning member (61) is moved from the standby position, the positioning detecting member (56) is moved to the first connecting portion ( 57), and when the large-diameter disk (DL) is further positioned, the second connecting portion (56a) reaches the limit position of the predetermined range, and the positioning detecting member (56) moves to the second position. With the connecting portion (56a) of It can be assumed to be the second detection position by moving.

A switch or the like is operated or a trigger member is driven by the positioning detecting member (56) which operates as described above.

The operation of the positioning detecting member is not limited to the above-mentioned operation. For example, the positioning detecting member (56) movably supported by the positioning member (61) is driven by a small-diameter disk (DS) to be positioned. Pushed first
When the positioning member (61) moves, the positioning detection member (56) moves together, and when the positioning member (61) reaches a position for positioning the large-diameter disk, Positioning detection member (56)
May be pressed by hitting a pressing portion or the like provided on the housing to become the second detection position.

Further, a driving means (75b) for moving the positioning member (61) in a direction away from the disk is provided, and when the power switching mechanism (B) is started, the driving mechanism is moved from the power switching mechanism (B) to the driving means. Preferably, power is transmitted to (75b) and the positioning member (61) is moved away from the small-diameter disk (DS) or the large-diameter disk (DL) after the clamping is completed.

Since the positioning member is separated from the disk, the disk is not damaged by the positioning member during driving of the disk.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the entire structure of a main part of a disk device, FIGS. 2A and 2B are plan views showing the operation of an insertion detecting mechanism when a large-diameter disk is inserted, and FIG. FIGS. 4 (A), 4 (B) and 5 (A) are plan views showing the operation of the insertion detection mechanism when inserted.
6 (B) and 6 (C) are side views of the disk drive showing the structure of the power switching mechanism for each operation, FIGS. 6 (A) and 6 (B) are enlarged side views showing details of the structure of the power switching mechanism, and FIGS. Is
Plan view showing the introduction operation and ejection operation of the large-diameter disc,
13 to 15 are plan views showing the operation of introducing and discharging the small-diameter disk. 16 to 19
FIG. 4 is a side view showing a clamp mechanism of the disk drive unit and a lock mechanism of the disk drive unit.

FIG. 1 shows a housing 1 of a disk drive for a vehicle. The housing 1 is formed smaller than a so-called 1DIN size, and is an external chassis (not shown) embedded in a recess formed in a console panel in an automobile.
It is large enough to accommodate. As shown in FIG. 2A, a nose 2 serving as a makeup portion is attached to the front of the opening 1a of the housing 1. On the front surface of the nose 2, various operation buttons, a liquid crystal display panel, and the like are provided.
CD (compact disc) or DVD with a diameter of 12cm
(Digital versatile disc) and a slit-shaped insertion opening 2a into which a small-diameter disc DS such as an SCD (single CD) having a diameter of 8 cm can be inserted. Case 1 shown in FIG.
Is formed by bending a metal plate, and a left side plate 3a, a right side plate 3b, and a bottom plate 3c are integrally formed. A ceiling plate (top chassis) 4 is attached to the upper ends of both side plates 3a and 3b.

As shown in FIG. 16 and FIG.
Accommodates a disk drive unit U. The disk drive unit U is supported in an elastic floating state by a damper and a spring inside the housing 1. The unit chassis 14 of the disk drive unit U is provided with a turntable T and a spindle motor M for rotationally driving the turntable as a rotary drive unit in which the center of the disk is installed. A base end of a clamp arm 15 is supported on the unit chassis 14 so as to be rotatable about a shaft 15 a, and a clamper 16 is provided at a distal end of the clamp arm 15. The clamp arm 15 is urged clockwise by a clamp spring 17, and the clamper 16 is lowered by the urging force, and the center of the disc is clamped between the clamper 16 and the turntable T, thereby clamping the disc ( Chucking).

In the plan view of FIG. 9, the clamp arm 15 is indicated by a chain line. As shown in this figure, positioning portions 15c and 15d for positioning the large-diameter disk DL on the disk drive unit U are provided on the clamp arm 15.
Is bent downward. This positioning part 15
c and 15d are other positioning portions in the present invention. As shown in FIGS. 8 and 9, the disk drive unit is equipped with an optical head H for reading or writing signals recorded on a disk that is clamped and driven to rotate.

(Configuration of Insertion Detection Mechanism) Opening 1 of Case 1
The insertion detection mechanism A is provided inside a. The roller 5 constituting the disk transfer means is provided inside the insertion detection mechanism A. As shown in FIG. 2A, the insertion detection mechanism A is provided with a pair of detection arms 6 and 7,
The two detection arms 6 and 7 are rotatably supported on support shafts 6 a and 7 a fixed to the bottom plate 3 c of the housing 1. Also, both detection arms 6 and 7 are provided with springs 11 and 12
Are biased in a direction to approach each other. A detection pin 8 is formed integrally with one detection arm 6, and a detection pin 9 is formed integrally with the other detection arm 7. When the detection arm 6 is turned counterclockwise by the spring 11, the detection switch SW1 is turned on by the detection arm 6, and the detection arm 7 is turned clockwise by the spring 12. Then, the detection switch SW2 is turned ON by the detection arm 7. Further, an auxiliary detection arm 13 linked to one of the detection arms 7
Is provided rotatably about the support shaft 13a, and the detection switch SW3 is operated by the auxiliary detection switch 13.

In a standby state in which the detection arms 6 and 7 are close to each other and located at a predetermined interval, both the detection switches SW1 and SW2 are ON. At this time, the distance between the detection pins 8 and 9 is slightly shorter than the diameter (8 cm) of the small-diameter disc DS such as an SCD (single CD). The detection pins 8 and 9 are located at equal intervals with respect to a center line OO passing through the center of the disk drive. When the small-diameter disc DS coincides with the center line OO,
When both switches SW1 and SW9 are inserted between
And SW2 are simultaneously turned off, and the housing 1 of the disk DS
The detection switches SW1 and SW2 are set to O
N. Alternatively, as shown in FIG. 13, when one of the detection pins 8 or 9 is pressed by the small-diameter disk DS to rotate the detection arm 6 or 7, the detection switch SW1 or SW2 is turned off once, and the disk is introduced. It is turned on accordingly. In any of the above states, it is detected that the small-diameter disc DS has been inserted.

When the large-diameter disk DL is inserted, the detection pins 8 and 9 on both sides are pushed and opened to both sides, and the detection switches SW1 and SW2 are simultaneously turned off.
When the FF is continued, the auxiliary detection arm 13 operates, and the detection switch SW3 performs an ON-OFF-ON operation. By the above switch operation, the large-diameter disk DL
Is detected. The switch SW4
The switch SW4 detects the state in which the disk is clamped in the disk drive unit U. The switch SW4 is turned to the position shown in FIG.
Is switched on.

(Configuration of Power Switching Mechanism) As shown in FIG. 1, a power switching mechanism B is provided on the left side plate 3a of the housing 1. 4 (A) (B) and 5 (A) (B)
(C) shows the power switching mechanism B seen through the left side plate 3 a of the housing 1. As shown in FIGS. 4A and 6A, the power switching mechanism B has a left side plate 3
A switching gear 21 that rotates about a support shaft 20 fixed to a is provided. The switching gear 21 has teeth of a predetermined module formed all around. This switching gear 2
The first switching lever 22 and the second switching lever 23 are controlled by the cam formed on one surface of the first switching lever 22.

The first switching lever 22 is provided rotatably about a shaft 22a fixed below the left side plate 3a of the housing 1. A connection pin 24 is provided at the upper end of the first switching lever 22 in the figure, and the connection pin 24 is provided on a lower surface of the ceiling plate 4 of the housing 1 so as to be slidable in the Y1-Y2 direction (first trigger lever). (Trigger member) 25. A recess 22 b is formed in the first switching lever 22, and a trigger projection 2 formed in the switching gear 21 is formed.
1a has entered this concave portion 22b.

The first switching lever 22 has a follower pin 2
6 is fixed, and the follower pin 26 is
The first cam 21b formed in a groove shape on the surface of the first cam 21 slides. When the switching gear 21 rotates in the CW direction from the state shown in FIG. 6A, the first cam 21b drives the first switching lever 22 counterclockwise about the shaft 22a. The trigger lever 25 is driven in the Y1 direction by the turning power of the first switching lever 22.

The second switching lever 23 is connected to the left side plate 3 of the housing 1.
It is rotatably supported by a shaft 23a provided on the upper part of a. A connection pin 27 is fixed to the lower end of the second switching lever 23 in the figure, and a load slider 28 slidably provided in the Y1-Y2 direction inside the left side plate 3a of the housing 1 and the connection pin 27. And are connected. A follower pin 29 is fixed to the second switching lever 23, and the follower pin 29 slides on a second cam 21 c formed in a groove shape on the surface of the switching gear 21. Therefore, when the switching gear 21 rotates in the CW direction from the state shown in FIG. 6A, the second switching lever 23 is rotated counterclockwise about the shaft 23a, thereby causing the load slider 28 to move in the Y2 direction. Is driven.

It should be noted that the state of FIG.
Rotates in the CW direction, first, as shown in FIG. 5A, the second switching lever 23 rotates counterclockwise (direction), and then, as shown in FIG. 1 switching lever 2
2 is driven counterclockwise. Thereafter, as shown in FIG. 5C, the shapes of the first cam 21b and the second cam 21c are set so that the second switching lever 23 is further driven in the counterclockwise direction. A drive gear 32 for applying a rotational force to the switching gear 21 is disposed on the right side of the switching gear 21 in the drawing. The drive gear 32 is provided so as to be rotatable about the shaft 31 integrally with the large-diameter gear 33. The power of a motor (not shown) is provided to the large-diameter gear 33.

As shown in FIGS. 6A and 6B, the shaft 3
A swing arm 34 is rotatably supported by 1.
The swing arm 34 is provided with a shaft 35a.
The idle gear 35 is rotatably supported by a, and the idle gear 35 is always meshed with the drive gear 32. A frictional force is applied between the drive gear 32 and the swing arm 34 or between the idle gear 35 and the swing arm 34. When the drive gear 32 rotates clockwise or counterclockwise, the swing The arm 34 and the idle gear 35 follow and rotate in the same direction.

A third cam 21d is formed on the back surface of the switching gear 21 opposite to the surface on which the first cam 21b and the second cam 21c are formed. As shown in FIG. 6A, in a state where the tip 34a of the swing arm 34 is in contact with the third cam 21d, even if the drive gear 32 rotates clockwise, the swing arm 34 moves clockwise. Rotation is prevented. As shown in FIG. 6B, when the switching gear 21 slightly rotates in the CW direction, the third cam 21d
Is disengaged from the distal end portion 34a, and the swing arm 34 and the idle gear 35 can rotate clockwise.

As shown in FIG. 6A, a guide hole 36 is formed in the second switching lever 23.
A shaft 35a supporting the idle gear 35 is inserted therein. This guide hole 36 is in the state of FIG. 6A (the state where the second switching lever 23 is rotating clockwise).
Thus, the first guide portion 36a having an arc shape centered on the shaft 31 of the drive gear 32 and the second guide having an arc shape centered on the shaft 23a of the second switching lever 23 in the state of FIG. Part 3
6b and the escape guide portion 36c are formed continuously. As shown in FIG. 5 (C), in a state where the second switching lever 23 is most rotated counterclockwise, the escape guide portion 36c has an arc shape centering on the shaft 31.

In the state shown in FIG. 6A, since the shaft 35a is located in the first guide portion 36a, when the third cam 21d is disengaged from the swing arm 34, the idle gear 35 6 rotates clockwise, and as shown in FIG. 6B, the idle gear 35 and the switching gear 21 can shift to a meshing state. As shown in FIG. 6B, when the second switching lever 23 is driven counterclockwise by the second cam 21c in a state where the idle gear 35 and the switching gear 21 are in mesh with each other, the shaft 35a is moved to the 2 guide part 36
When the second switching lever 23 is rotated within the position b, the meshing between the idle gear 35 and the switching gear 21 is continued (see FIGS. 5A and 5B). And FIG.
When the second switching lever 23 is finally rotated counterclockwise as shown in FIG.
6c. When the second switching lever 23 rotates to the position shown in FIG. 5C, the escape guide portion 36c
Therefore, the idle gear 35 can be separated from the switching gear 21 by the swinging operation of the swing arm 34 in the clockwise direction.

In the power switching mechanism B, teeth are formed on the entire circumference of the switching gear 21. The operation of the third cam 21d and the second switching lever 23 causes the switching gear 21 to operate as shown in FIGS.
The idle gear 35 is separated from the switching gear 21 in both the standby state shown in FIG. 5A and the operation completed state shown in FIG. Therefore, in both the initial state and the operation completed state, unnecessary power is not transmitted to the switching gear 21 even if the motor continues to rotate due to erroneous detection of the disk state.

As shown in FIG. 4A, an elongated hole 28a is formed in the load slider 28.
is guided by the guide shaft 37 provided on the left side plate 3a of the housing 1, and the load slider 28 can move in the Y1-Y2 direction. A guide groove 28b is formed at the end on the Y2 side of the load slider 28, and a pin 38 fixed to the roller arm 41 is inserted into the guide groove 28b. The roller arm 41 is rotatably supported at its upper end in the figure by a support shaft 42 provided on the housing 1, and is urged clockwise by a spring 43. The roller 5 is provided with the roller 5 for transferring the disk.
Roller shaft 5a is rotatably supported. A driven gear 45 for driving the roller is fixed to the roller shaft 5a.

In the standby state shown in FIG. 4, the load slider 28 is located in the Y1 direction, and the roller arm 41 is in a free state. Therefore, the roller arm 41 is urged clockwise by the spring 43, and the roller 5 is pressed against the roller pad 44 provided in the housing 1 so that the inserted disk can be clamped. At this time, the driven gear 45 that rotates integrally with the roller 5 meshes with the large-diameter gear 33, and the roller 5 can be driven to rotate by the large-diameter gear 33.

As shown in FIG. 5A, when the load slider 28 is driven in the Y2 direction by the second switching lever 23, the roller arm 41 is rotated counterclockwise by the guide groove 28b, and 5 is separated from the roller pad 44, the feeding force to the disk DL is cut off, and the disk DL (or DS) is set on the turntable of the drive unit. When the roller arm 41 rotates to the state shown in FIG. 5C, the driven gear 45 separates from the large-diameter gear 33, and the roller driving force from the large-diameter gear 33 to the driven gear 45 is cut off.

(Structures of Disk Clamp Mechanism and Disk Drive Unit Lock Mechanism) As shown in FIGS. 16 and 17, two ends of drive grooves 28c and 28d are formed at the end of the load slider 28 on the Y1 side. ing. A rotating cam 81 is rotatably supported by a shaft 82 inside the left side plate 3a of the housing. This rotating cam 81 has
A clamp cam 81a shown in FIG. 16 and a lock cam 81b shown in FIG. 18 are formed integrally. As shown in FIG. 16, drive pins 83a and 83b are formed integrally with the rotary cam 81, and the drive groove 28c is fitted with the drive pin 83a while the load slider 28 moves in the Y2 direction. Then, the rotating cam 81 is rotated in the counterclockwise direction, and the driving groove 28c is fitted into the driving pin 83b, so that the rotating cam 8
1 is further rotated counterclockwise. The clamp arm 15 provided in the disk drive unit U is integrally formed with a pressed piece 15b.
Is opposed to the pressed piece 15b.

FIG. 16 shows that the road slider 28 corresponds to FIG.
The state at the standby position of (A) is shown. While the load slider 28 moves to the position shown in FIG. 5A in the Y2 direction, the pressed piece 15b is lifted by the clamp cam 81a, and the clamper 16 moves upward, so that the disc is not clamped in the clamp released state. is there. Between the time when the load slider 28 moves from FIG. 5 (A) to FIG. 5 (B),
The clamp cam 81a is disengaged from the pressed piece 15b, and the clamp arm 15 is lowered by the elastic force of the clamp spring 17, so that the disc is moved from the turntable T to the clamper 1.
6 and clamped (chucked).

When the clamper 16 is lifted upward as shown in FIG. 16, a pair of positioning portions 15 bent from the clamp arm 15 as shown in FIG.
Reference numerals c and 15d face positions where the large-diameter disk DL can be positioned on the carrying path of the large-diameter disk DL. As shown in FIG. 17, when the clamper 16 is lowered and the large-diameter disk DL is clamped on the turntable T, the positioning portion 1 is moved by the clockwise rotation locus of the clamp arm 15.
5c and 15d are slightly separated from the outer periphery of the large-diameter disk DL.

As shown in FIG. 18, a lock slider 85 is provided inside the device from the load slider 28.
Are slidably supported in the Y1-Y2 directions. The lock slider 85 is integrally formed with lock projections 86a and 86b. In FIG. 18, the lock slider 85 has moved in the Y1 direction. At this time, the lock projections 86a and 86b are fitted into the lock grooves 14a and 14b of the unit chassis 14, and the lock cam 81b is pressed against the lock piece 14c of the unit chassis 14, so that the disk drive unit U is And is locked so as not to be elastically supported.

A drive pin 84 is formed integrally with the lock cam 81b. The lock slider 85 is provided with an arc portion 86c on which the drive pin 84 slides, and a concave portion 86d formed at the lower end of the arc portion 86c. When the load slider 28 moves in the Y2 direction and the rotating cam 81 rotates counterclockwise, the lock cam 81b
In this case, the drive pin 84 slides on the arc portion 86c while the disk drive unit U remains locked. That is, while the load slider 28 moves to the position shown in FIG. 5B and the disk is clamped as described above, the disk drive unit U remains locked. Then, the road slider 28 is moved from the position of FIG.
While moving to the position (C), as shown in FIG.
The lock pin 8 of the lock cam 81b is used to lock the lock slider 8.
5 is driven in the Y2 direction, the lock projections 86a and 86b come off the lock grooves 14a and 14b, and the lock cam 81
b is disengaged from the lock piece 14c, the lock of the disk drive unit U is released, and the disk drive unit U is brought into an elastic floating state by a damper and a spring in the housing 1.

(Structure of Disk Positioning Mechanism) As shown in FIG. 7, members constituting the disk positioning mechanism E are supported on the lower surface of the ceiling plate 4 of the housing 1. FIG.
As shown in (A), the first switching lever 22 of the power switching mechanism B is connected to a trigger lever 25 by a connecting pin 24. As shown in FIG. 7, a slide pin 51 is provided on the trigger lever 25, and this slide pin 51 is
Of the ceiling plate 4 (see FIG. 1), and is also guided by another guide mechanism. With these guides, the trigger lever 25 is slidable in the Y1-Y2 directions. As shown in FIG. 4A, a spring hook 25a is formed by bending the trigger lever 25, and a spring 52 is hooked between the spring hook 25a and the ceiling plate 4. , The trigger lever 25
Are urged in the Y2 direction.

A shaft 53 provided on the lower surface of the ceiling plate 4 has
A trigger arm 54 as a second trigger member is rotatably supported. A pin 55 is fixed to the trigger arm 54. The trigger lever 25 has an escape hole 25b extending in the Y1-Y2 direction,
5b is formed with a trigger recess 25c formed at the end on the Y1 side, and the pin 55 is connected to the trigger recess 2c.
5c and the escape hole 25b. The trigger arm 54 is in contact with the stopper 4b formed on the ceiling plate 4 in the state shown in FIG. 7, and the trigger arm 54 is regulated so as not to rotate further counterclockwise from the state shown in FIG. .

The trigger arm 54 is provided with a positioning detecting arm 56 serving as a positioning detecting member for detecting that the disk is positioned on the turntable T of the disk drive unit U. A connection pin 57 provided on the left end of the positioning detection arm 56 in the figure is connected to the trigger arm 54 to form a first connection portion. In the state shown in FIG. 7, the positioning detection arm 56 has an arc hole 56 a having a predetermined radius centered on the connection pin 57, and the arc hole 56 a is fixed to the ceiling plate 4 of the housing 1. 4c is slidably inserted. A second connecting portion is formed by the arc hole 56a and the shaft 4c. A detection pin 58 to which the small-diameter disk DS contacts is fixed to the right end of the positioning detection arm 56 in the figure. In the state of FIG. 7, the detection pin 58 is located on a center line OO passing through the drive center of the turntable T and the clamper 16.

As shown in FIGS. 1 and 7, the ceiling plate 4 of the housing 1 has elongated holes 4d, 4e, 4e extending in the Y1-Y2 direction.
f is formed. On the lower surface of the ceiling plate 4, a positioning slider 6 is mainly used with a small-diameter disk DS as a positioning member.
1 is provided. Sliding pins 61a, 61b, 61c fixed to the positioning slider 61 are slidably inserted into the elongated holes 4d, 4e, 4f, respectively, and the positioning slider 61 is slidably supported in the Y1-Y2 direction. ing. A pair of positioning pins 62a and 62b are provided at the end of the positioning slider 61 on the Y1 side, and when one of the large-diameter disk DL and the small-diameter disk DS is inserted, the insertion side of these disks is inserted. The peripheral portion contacts the positioning pins 62a and 62b. The positioning pins 62a and 62b are arranged at equal intervals in the X1 direction and the X2 direction with respect to the center line OO.

The positioning slider 61 and the positioning detection arm 56 are connected to each other. In the state of FIG. 7, X1-X2
The detection drive hole 56b extending in the direction and the escape hole 56c extending obliquely in the state of FIG. 7 are formed continuously, and the drive pin 61d provided in the positioning slider 61 is connected to the detection drive hole 56b. It is slidably inserted into the hole 56c. This drive pin 61d is a third connecting portion. The positioning slider 61 has Y1-Y
A lock hole 61e extending in two directions is formed, a first lock portion 61f having a step is formed at an end on the Y1 side of the lock hole 61e, and a second lock having a step is also formed at an end on the Y2 side. A portion 61g is formed.

On the lower surface of the ceiling plate 4 of the housing 1, a lock lever 63 is provided as a lock member for performing a lock operation on the lock hole 61e. Guide pins 4g are fixed to the lower surface of the ceiling plate 4, and a support shaft 4h coaxial with the support shaft 6a of the detection arm 6 (see FIG. 2A) is fixed to the lower surface of the ceiling plate 4 as well. , The lock lever 6
3 is X1-X2 with respect to the guide pin 4g and the support shaft 4h.
It is slidably supported in the direction. Lock lever 6
Reference numeral 3 is urged in the X1 direction by a lock spring 64 which is a lock urging member. A lock pin 65 that selectively engages with the first lock portion 61f and the second lock portion 61g is provided at the end on the X2 side of the lock lever 63.

On the left side of the lower surface of the ceiling plate 4 in the figure, a lock drive arm 66 serving as a lock drive member is provided.
The lock drive arm 66 is rotatably supported on the support shaft 4h as a fulcrum, and the tip on the Y2 side is connected to the upper end of the detection pin 8 constituting the insertion detection mechanism A. ing. Therefore, when the detection pin 8 is pushed in the X1 direction by the inserted disk, the lock drive arm 66 is rotated clockwise.

A drive pin 67 is provided at an end of the lock drive arm 66 on the Y1 side. On the other hand, the lock lever 63 has an escape hole 63 a and a drive hole 63
b is formed, and the drive pin 67 is
a and the drive hole 63b. When the lock drive arm 66 rotates clockwise from the state shown in FIG. 7 and the drive pin 67 reaches the inside of the drive hole 63b as shown in FIG. 8, the lock lever 63 is driven in the X2 direction, and the lock pin 65 is 1
The lock of the positioning slider 61 is released away from the lock portion 61f.

A drive arm 68 for driving the positioning slider 61 is provided on the Y2 side and X1 side of the lower surface of the ceiling plate 4. This drive arm 68
It is rotatably supported by a support shaft 69 fixed to the lower surface of the ceiling plate 4, and is urged clockwise by a return spring 72. A connection pin 71 is provided at the end of the drive arm 68 on the X2 side, and is connected to the end of the positioning slider 61 on the Y2 side. Therefore, the positioning slider 61 is driven in the Y1 direction by the turning force of the drive arm 68 in the counterclockwise direction. When the drive arm 68 is returned in the clockwise direction by the return spring 72, the positioning slider 61 is also moved. They are moved together in the Y2 direction.

A control rotator 75 is provided on the left side of FIG. 7 and is rotatably supported by a shaft 76 fixed to the lower surface of the ceiling plate 4. Control rotator 7
5 has a lock control cam (lock control means) 75a
The lock control cam 75a is opposed to the left end 63c of the lock lever 63. The lock lever 63 is controlled according to the rotation phase of the lock control cam 75a.
Is driven in the X2 direction. That is, the lock lever 6
3 is a lock drive arm 66 which rotates together with the detection pin 8.
Is driven in the unlocking direction, but is also driven in the unlocking direction by the lock control cam 75a.

A drive cam (drive means) 75b is integrally formed on the lower surface of the control rotator 75. The rotation of the control rotator 75 causes the drive cam 75b to press the end 68a of the drive arm 68, thereby driving the drive arm 68 counterclockwise. Control rotator 7
5 is formed integrally with a pinion gear 75c, and a rack 25d formed on the trigger lever 25 is engaged with the pinion gear 75c. Therefore, the rotation phase of the control rotator 75 is determined according to the position of the trigger lever 25 in the Y1-Y2 direction.

Next, the operation of introducing and ejecting the large-diameter disk DL and the small-diameter disk DS in the disk device will be described. (Standby state) In the insertion detection mechanism A shown in FIG. 2A and below, in the standby state, the detection arm 6 and the detection arm 7 are pulled in the direction approaching each other by the springs 11 and 12, and the detection pin 8 and 9 is the shortest distance (small diameter disk D
(Slightly shorter than the diameter of S), and the detection switches SW1 and SW2 are both ON.

The power switching mechanism B in the standby state is shown in FIG.
6 (A) and FIG. 6 (A). At this time,
The switching gear 21 is in a state of being rotated most counterclockwise.
The trigger lever 25 provided on the lower surface of the ceiling plate 4 is moved in the Y2 direction by a spring 52. The follower pin 26 of the first switching lever 22 connected to the trigger lever 25 via the connecting pin 24 is located at the clockwise end of the first cam 21b of the switching gear 21. As a result, the first switching lever 22 is in a state rotated clockwise.

The follower pin 29 provided on the second switching lever 23 is located at the clockwise end of the second cam 21c formed on the switching gear 21, and the second switching lever 23 is also clockwise. It is turning. At this time, the shaft 35a of the idle gear 35 is located in the first guide portion 36a of the guide hole 36 formed in the second switching lever 23. However, the tip 34 a of the swing arm 34 is connected to the switching gear 21.
, The swing arm 34 and the idle gear 35 are prevented from swinging clockwise.

Also, since the second switching lever 23 is in a position rotated clockwise, the load slider 2 connected to the second switching lever 23 via the connecting pin 27 is connected.
8 moves in the Y1 direction, the guide groove 28b formed at the end on the Y2 side of the load slider 28 opens the pin 38, and the roller arm 41 is in a free state. Therefore,
The roller arm 41 is urged clockwise by a spring 43 so that the roller 5 is pressed against the roller pad 44 and the driven gear 45 fixed to the roller shaft 5 a is meshed with the large-diameter gear 33.

Further, when the road slider 28 is Y1
As shown in FIG. 16, the rotating cam 81 is rotated clockwise, the pressed piece 15b is lifted by the clamp cam 81a, and the clamp arm 15 is turned upward. The clamper 16 moves away from the turntable T. As shown in FIG. 18, a drive pin 84 formed on a lock cam 81b of the rotation cam 81 is located at an arc portion 86c of a lock slider 85, and the lock slider 85 moves in the Y1 direction. . Therefore, the lock projections 86a and 86b provided on the lock slider 85 are fitted into the lock grooves 14a and 14b, and the lock cam 81b presses the lock piece 14c, so that the disk drive unit U is locked.

Disk positioning mechanism E in standby state
Is as shown in FIG. When the trigger lever 25 is Y
Since it has moved in two directions, the pin 55 provided on the trigger arm 54 fits into the trigger recess 25c formed on the trigger lever 25, and the trigger arm 54
The counterclockwise rotation is restricted by the stopper 4b. In the standby state, the rack 2 of the trigger lever 25
By 5d, the control rotator 75 is rotated counterclockwise. Since the drive cam 75b formed on the control rotator 75 is separated from the end 68a of the drive arm 68, the drive arm 68 is rotated clockwise by the return spring 72 and connected to the drive arm 68. The positioning slider 61 connected by the pin 71 is moved in the Y2 direction.

Since the detection arm 6 of the insertion detection mechanism A is rotated counterclockwise by the spring 11, the lock drive arm 66 connected to the detection pin 8
Is also rotated counterclockwise as shown in FIG. Therefore, the drive pin 67 provided on the lock drive arm 66 is located in the escape hole 63a of the lock lever 63,
The lock lever 63 is urged by a spring 64 in the X1 direction. Then, the lock pin 65 provided on the lock lever 63 is fitted to the first lock portion 61f of the positioning slider 61, and the positioning slider 61 is locked. As shown in FIG.
1 is locked by the first lock portion 61f, the positioning pins 62a and 6
2b is close to the center of the turntable T and the clamper 16, that is, the drive center of the disk. As shown in FIG. 14, the positioning pins 62a and 62b in the standby state are positions at which the small-diameter disk DS can be positioned at the drive center.

(Introduction operation of large-diameter disk DL) FIG.
As shown in (A), when the large-diameter disc DL is inserted from the insertion opening 2a of the nose 2 into the opening 1a of the housing 1, the detection pins 8 and 9 on both sides of the insertion detection mechanism A are in the X1 direction. X
It is pushed open in two directions. In FIG. 2A, the detection arm 6
And 7 rotate, and the detection switches SW1 and SW2 are turned off.
become. Further, in FIG. 2B, the detection switch SW3 is turned off by the auxiliary arm 13, and then the detection switch SW3 is turned off.
It becomes N. The switching output of the detection switch detects that the large-diameter disk DL has been inserted.

The above detection switch SW1 or SW2
Is turned off, a motor start command is issued from a control circuit (not shown), and the motor starts. The large-diameter gear 33 of the power switching mechanism B is driven clockwise by this motor. In the standby state, as shown in FIG. 4A, since the driven gear 45 integrated with the roller 5 is engaged with the large-diameter gear 33, when the motor starts, power is supplied to the driven gear 45 via the large-diameter gear 33. The roller 5 is transmitted in the counterclockwise direction. Therefore, the large-diameter disk DL is sandwiched between the roller 5 and the roller pad 44, and is drawn inward (Y1 direction) of the housing 1 by the rotational force of the roller 5.

In the state shown in FIG. 4A, the driving gear 32 rotates clockwise together with the large-diameter gear 33, and the idle gear 35 meshing with the driving gear 32 rotates counterclockwise. At this time, the clockwise turning force acts on the swing arm 34 due to the frictional force. However, as shown in an enlarged view in FIG. 6A, the tip 34 a of the swing arm 34 Since it is in contact with the third cam 21d, the clockwise rotation of the swing arm 34 is restricted, and the idle gear 35 remains separated from the switching gear 21. Therefore, when the disk DL sandwiched between the roller 5 and the roller pad 44 is transferred in the Y1 direction, the switching gear 21 is stopped, and the first switching lever 22 and the second switching lever 2 are stopped.
3 remains in the state of FIG.

FIG. 8 shows that the large-diameter disk DL is being transported in the Y1 direction, but when the disk DL is fed a predetermined distance in the Y1 direction, the peripheral edges at the leading end in the insertion direction of the disk DL are positioned by the positioning pins 62a and 62b. Hit. At this time, the power switching mechanism B remains as shown in FIG. During the movement to the position shown in FIG. 8 after the insertion of the disk DL, the detection pin 8 of the insertion detection mechanism A is pushed and moved in the X1 direction by the peripheral edge of the disk DL.
The lock drive arm 66 to which the detection pin 8 is connected
Is rotated clockwise. Therefore, the drive pin 67 provided on the lock drive arm 66 is
Is pushed in the X2 direction, the lock lever 63 is moved in the X2 direction, the lock pin 65 is separated from the first lock portion 61f, and the lock of the positioning slider 61 is released.

Therefore, when the large-diameter disk DL is further fed in the Y1 direction from the state shown in FIG. 8, the positioning pins 62a and 62b are pushed by the leading end of the disk DL on the insertion side.
The positioning slider 61 is moved in the Y1 direction.
When the positioning slider 61 moves in the Y1 direction, the positioning detection arm 56 is pushed in the Y1 direction by the drive pin 61d provided on the positioning slider 61. At this time, the drive pin 61d slides in the detection drive hole 56b of the positioning detection arm 56, and the positioning detection arm 56
Is connected to the trigger arm 54 and is turned counterclockwise (the direction of FIG. 8) about the connection pin 57 as a fulcrum.
During this time, the arc holes 5 formed in the positioning detection arm 56
6 a slides on a shaft 4 c provided on the ceiling plate 4. FIG.
Shows a state in which the center of the large-diameter disk DL has reached the center of the turntable T and the clamper 16 of the disk drive unit U.

Before reaching FIG. 9, the positioning detection arm 56
Since the clockwise end of the circular hole 56a, which is the second connecting portion, hits the shaft 4c, the positioning slider 61 is pushed in the Y1 direction by the large-diameter disk DL, and the drive pin 61d slides in the detection drive hole 56b. At this time, the positioning detection arm 56
Is supplied with a turning force in the counterclockwise direction (direction of FIG. 9) with the shaft 4c as a fulcrum, and the positioning detection arm 56 rotates to the second detection position. This turning force causes the trigger arm 54 to rotate clockwise (direction), and the pin 55 provided on the trigger arm 54 pushes the trigger recess 25c of the trigger lever 25 in the Y1 direction. It is moved a short distance in the Y1 direction as indicated by 9.

When the trigger lever 25 moves in a short distance, the control rotator 75 is slightly rotated clockwise by the rack 25d. However, in the state of FIG. 9, the rotation of the control rotator 75 is slight, and the lock control cam 75 a formed on the control rotator 75 is slightly separated from the left end 63 c of the lock lever 63. on the other hand,
When the disk DL is transported to the position shown in FIG. 9 and the center of the disk DL reaches the drive center, the peripheral edge of the rear part of the disk DL is separated from the detection pin 8, so that the detection arm 6 is returned counterclockwise by the spring 11. Then, the lock drive arm 66 also returns in the counterclockwise direction. Therefore,
The lock lever 63 becomes free and is moved in the X1 direction by the lock spring 64, so that the lock pin 65
Is fitted to the second lock portion 61g of the positioning slider 61, and is locked so that the positioning slider 61 does not return in the Y2 direction (standby position direction).

Further, the Y of the large-diameter disk DL sent to a position where the center coincides with the rotation center of the turntable T
The edge in one direction hits the other positioning portions 15c and 15d provided on the clamp arm 15, and the disk DL stops at that position. Therefore, until the roller 5 separates from the disk DL and descends, the disk DL is positioned so as not to move in the Y1 direction.

As shown in FIG. 9, when the center of the disk DL reaches the drive center position and is positioned by the positioning portions 15c and 15d, the drive arm 68 is controlled by the control rotating body 7
5 is separated from the drive cam 75b of the
8 is in a free state, and the returning spring 72 applies a clockwise turning force. Therefore, the positioning slider 61 to which the drive arm 68 is connected also has Y position.
A return force is acting in two directions. Therefore, the roller 5
When the disk DL is pinched by the roller pad 44 and the feeding force is acting, the disk does not return, but after the state of FIG. 9, if the roller 5 separates from the disk DL, it will move in the Y2 direction. The disk DL is returned in the Y2 direction by the positioning pins 62a and 62b provided on the positioning slider 61. In order to prevent such a phenomenon, in this embodiment, FIG.
In the state shown in (1), the lock pin 65 is fitted into the second lock portion 61g, the positioning slider 61 is locked so as not to return in the Y2 direction, and the positioning pin 62a and 62b prevents the disk DL from being pushed back. D
L can be maintained in a state where it is positioned by the positioning portions 15c and 15d.

As described above, the pair of positioning pins 62a,
Reference numeral 62b is urged by the return spring 72 so as not to move easily from the position shown in FIG. Therefore, this positioning pin 62a
Turn the large-diameter disc DL using the turntable T
Positioning on top is also possible. 9, the trigger lever 25 is moved in the direction by a small distance as described above.
When the first switching lever 22 connected to the trigger lever 25 via the connecting pin 24 is turned counterclockwise (FIG. 4B).
Direction). As shown in FIG. 4B, the trigger projection 21a of the switching gear 21 is pushed by the recess 22b of the first switching lever 22 that rotates in the direction, and the switching gear 21 is slightly rotated in the CW direction.

As a result, as shown in FIGS. 4B and 6B, the third cam 21d
Is separated from the tip 34a of the swing arm 34, and the swing arm 34 is in a free state. Since the drive gear 32 is rotated clockwise by the motor, the free swing arm swings clockwise due to frictional force.
At this time, the shaft 35a moves within the first guide portion 36a of the second switching lever 23 to reach the second guide portion 36b, and is regulated so as not to swing further clockwise. It meshes with the gear 21 and maintains that state. Therefore, the torque of the drive gear 32 is transmitted to the switching gear 21 via the idle gear 35, and the switching gear 21
Are driven to rotate in the CW direction.

From the state shown in FIG.
6A, the second switching lever 23 is driven counterclockwise (direction of FIG. 5A) by the second cam 21c of the switching gear 21 shown in FIG. 6A with the shaft 23a as a fulcrum. At the time of FIG. 5A, power is not transmitted to the first switching lever 22 due to the shape of the first cam 21b formed on the switching gear 21, and the first switching lever 22 is in the state shown in FIG. (Position slightly moved in the direction from FIG. 4 (A))
And only the second switching lever 23 is driven in the direction.

When the second switching lever 23 rotates in the direction, the load slider 28 connected to the second switching lever 23 moves to Y2.
To the roller arm 41 by the guide groove 28b.
Is rotated counterclockwise, and the roller 5 is
, And the feed force to the disk DL is released. At the same time, the moving force of the road slider 28 in the Y2 direction
The rotating cam 81 rotates counterclockwise from the state shown in FIG. 16, and the clamp cam 81a of the rotating cam 81 moves the pressed piece 15
b, the clamp arm 15 descends, and the center of the disk DL is clamped between the clamper 16 and the turntable T. At this time, the positioning portions 15c and 15d for positioning the large-diameter disk DL in the state of FIG. 16 according to the rotation trajectory of the clamp arm 15 from FIG. 16 to FIG. Slightly away from the department.

That is, as shown in FIG. 6B, immediately after the large-diameter disk DL reaches the state shown in FIG. 8 from FIG. 9 and the second lock portion 61g of the positioning slider 61 is locked by the lock pin 65. , The idle gear 35 is the switching gear 2
1 and the switching gear 21 is driven in the CW direction,
The second switching lever 23 moves in the direction, and along with this, the load slider 28 moves in the Y2 direction.
1 rotates downward, the feeding force to the disk DL is released, and the disk DL is clamped. At this time, since the positioning slider 61 is locked by the lock pin 65 so as not to return in the Y2 direction, the feeding force is cut off, and the disc DL, in which the pinching force between the roller 5 and the roller pad 44 is cut off, completes the clamping operation. The center of the disk DL is securely set on the turntable T and clamped with the lowering of the roller 5 without returning to the Y2 direction before.

Immediately after the above-mentioned disc clamping operation is completed, the first cam 21b (see FIG. 6 (A)) of the switching gear 21 which continues to rotate causes the first switching lever 22 to move as shown in FIG.
It is rotated counterclockwise as shown in FIG. Therefore, as shown in FIG. 10, the trigger lever 25 connected to the first switching lever 22 is moved a long distance in the Y1 direction, and the rack 25 formed on the trigger lever 25 is moved.
The control rotator 75 is driven clockwise (direction) by d. At this time, the end 68a of the drive arm 68 is pushed by the drive cam 75b formed on the control rotator 75, and the drive arm 68 is largely rotated in the counterclockwise direction, and is connected to the drive arm 68. As shown in FIG. 10, the positioning slider 61 moves in the Y1 direction, and the positioning pins 62a and 62b are retracted to positions away from the peripheral edge of the disk DL. In the above, when the positioning slider 61 is locked by the lock pin 65 as shown in FIG. 9, the driving force of the roller 5 is cut off and the disk DL is clamped on the turntable T. Then, the positioning slider 61 is immediately evacuated as shown by.

When the retraction operation of the positioning slider 61 is completed, the CW of the switching gear 21 continued thereafter is completed.
By the rotation in the direction, the first switching lever 22 is moved to the position shown in FIG.
The second cam 21c keeps the second
The switching lever 23 is further rotated in the counterclockwise direction (the direction of FIG. 5C). Therefore, the road slider 28
Is moved to the terminal end in the Y2 direction, and as shown in FIG. 5C, the roller arm 41 is further rotated counterclockwise by the guide groove 28b. At this time, the movement of the road slider 28 to the end in the Y2 direction causes
As shown in FIG. 9, the lock cam 81b of the rotating cam 81 is driven counterclockwise to release the lock of the disk drive unit U, and the disk drive unit U is supported in an elastic floating state by a damper or the like.

When the load slider 28 moves to the final position in the Y2 direction, the escape guide portion 36c of the second switching lever 23 reaches the position of the shaft 35a of the idle gear 35. In this state, since the drive gear 32 is rotating clockwise, the shaft 35a moves in the escape guide portion 36c by the swinging operation of the swing arm 34, and the idle gear 35 is completely separated from the switching gear 21. In this state, FIG.
The switch SW4 is turned ON by the roller arm 41 which has been rotated to the position (2), and the motor stops. Then, the disk DL is driven to rotate, and the signal recorded on the disk DL is reproduced.

(Ejecting Operation of Large Diameter Disk DL) When a disk ejection command is issued, in the state of FIG.
And the drive gear 32 is driven counterclockwise. FIG.
In the state (C), since the shaft 35a of the idle gear 35 is located at the escape guide portion 36c of the second switching lever 23, the swing arm 34 is rotated with the rotation of the drive gear 32 in the counterclockwise direction. Rotating in the counterclockwise direction, the idle gear 35 meshes with the switching gear 21. And, when the switching gear 21 is CC
It is rotated in the W direction.

At the initial time when the switching gear 21 starts to rotate in the CCW direction, the second switching lever 23 is driven clockwise by the second cam 21c of the switching gear 21, and FIG.
To the position shown. 5C, the load slider 28 is driven in the Y1 direction by the second switching lever 23 that rotates clockwise. Thereby, the roller arm 41 is slightly rotated clockwise, and the roller 5 hits the lower surface of the disk DL being clamped. In addition, the lock mechanism of the disk drive unit operates, and the disk drive unit that has been in the elastic floating state up to that point is locked as shown in FIG.

In the subsequent rotation of the switching gear 21 in the CCW direction, the second switching lever 23 is maintained at the position shown in FIG. 5B by the second cam 21c.
As a result, the first switching lever 22 is driven clockwise.
Therefore, the trigger lever 25 connected to the first switching lever 22 moves in the Y2 direction. At this time, the control rotator 75 is rotated counterclockwise from the state of FIG. 10 by the rack 25d formed on the trigger lever 25.

When the control rotator 75 rotates counterclockwise from the position shown in FIG. 10, first, the drive cam 75b is disengaged from the end 68a of the drive arm 68, and the drive arm 68 is rotated clockwise by the return spring 72. Powered. Accordingly, the positioning slider 61 connected to the drive arm 68 receives the return elastic force of the return spring 72 and moves in the Y2 direction, as shown in FIG.
The positioning pins 62a and 62b provided on the positioning slider 61 contact the end on the Y1 side of the large-diameter disk DL still clamped on the turntable T. However, when the control rotator 75 from FIG. 10 slightly rotates counterclockwise, the lock lever 63 is pushed in the X2 direction by the lock control cam 75a. Therefore, immediately after the positioning pins 62a and 62b hit the large-diameter disk DL, the lock pin 65 is still separated from the second lock portion 61g. Therefore, although the return elastic force acts on the disk DL by the return spring 72, the disk D
Since L is clamped, it is not returned in the Y1 direction.

When the first switching lever 22 is rotated clockwise thereafter, the trigger lever 25 is further moved in the Y2 direction, and when the second switching lever 23 returns to the position shown in FIG. 25d controlled rotator 7
The lock control cam 75a is disengaged from the left end 63c of the lock lever 63 as shown in FIG. 11, and the lock lever 63 receives the urging force in the X1 direction by the lock spring 64. Therefore,
As shown in FIG. 11, the lock pin 65 is fitted into the second lock portion 61g of the positioning slider 61, and is locked so that the positioning slider 61 cannot move in the Y2 direction.

As shown in FIG. 11, the positioning pins 62
a, 62b hit the front edge of the large-diameter disc DL,
When the positioning slider 61 is locked, the first switching lever 22 stops in the posture shown in FIG. In the subsequent rotation of the switching gear 21 in the CCW direction, the first switching lever 22 is held at the position shown in FIG. 5A, and then the second switching lever 23 is moved by the second cam 21c to the position shown in FIG.
Is rotated slightly clockwise as shown in FIG.

While the second switching lever 23 is rotated clockwise, the load slider 28 is driven by the second switching lever 23 in the Y1 direction. During the movement of the load slider 28 in the Y1 direction, the clamp arm 15 of the disk drive unit U is lifted by the load slider 28 as shown in FIG. The clamp of the disk DL is released. At about the same time, the guide groove 28b of the road slider 28 opens the pin 38,
The roller arm 41 is rotated clockwise by the elastic force of the spring 43, and the disk is held between the roller 5 and the roller pad 44. Then, from the large-diameter gear 33 to the driven gear 4
Due to the driving force applied to the roller 5, the roller 5 rotates clockwise, and the disk DL starts to be ejected in the Y2 direction.

Immediately thereafter, as shown in FIG. 4A, since the first guide portion 36a of the second switching lever 23 reaches the position of the shaft 35a, the swing arm is rotated by the drive gear 32 rotating counterclockwise. 34 swings counterclockwise, the idle gear 35 separates from the switching gear 21, and the switching gear 21 stops in the posture of FIG. Thereafter, the large-diameter gear 33 continues to rotate, and the disk DL is discharged in the Y2 direction by the rotational force of the roller 5. In the disc ejection operation, as shown in FIG.
Since the disk clamp is released in a state where 1g is locked by the lock pin 65, the return spring 72 is used immediately after the disk clamp is released and before the disk DL is completely caught between the roller 5 and the roller pad 44. The positioning slider 61 does not return in the Y2 direction. Therefore, no force is exerted on the disk DL in the Y2 direction before the disk DL is sandwiched between the roller 5 and the roller pad 44.

Next, as shown in FIG. 12, when the disk DL is ejected in the Y2 direction by the rotational force of the roller 5, the detection pin 8 of the insertion detection mechanism A is detected by the peripheral edge of the disk DL.
And 9 are pushed open from side to side. Accordingly, the lock drive arm 66 connected to the detection pin 8 is also rotated clockwise. As a result, the lock lever 63 is driven in the X2 direction by the drive pin 67 provided on the lock drive arm 66, the lock pin 65 is separated from the second lock portion 61g, and the lock of the positioning slider 61 is released.
Then, the positioning slider 61 returns in the Y2 direction by the elastic force of the return spring 72, and returns to the initial state shown in FIG. Then, when the insertion detection mechanism A detects that the disk DL has been ejected to the predetermined position, the motor stops, and the power switching mechanism B also stops in the initial state shown in FIG.

FIG. 3 shows a state in which the center of the small-diameter disk DS is inserted so as to coincide with the center line OO. At this time, in the insertion detection mechanism A, the detection pins 8 and 9 are slightly widened, and the detection switches SW1 and SW2 are simultaneously turned off. Further, as shown in FIG. 13, there is a possibility that the small-diameter disc DS is inserted from a position offset toward the X1 side of the insertion slot 2a. At this time, only the left detection pin 8 is pushed in the X1 direction, and only the detection switch SW1 is turned off. Or small disk D
S may be inserted into the insertion opening 2a from a position offset toward the X2 side. At this time, the right detection pin 9 is pushed in the X2 direction, and only the detection switch SW2 is turned off.
In either of the detection states, SW1 or SW
4 is turned off, the motor starts, the large-diameter gear 33 rotates clockwise in the state of FIG. 4A, the roller 5 rotates counterclockwise, and the disc DS The sheet is fed in the Y1 direction while being sandwiched between the roller pads 44.

In the standby state shown in FIG. 7, the positioning slider 61 is locked by the lock pin 65 as described above, but as shown in FIG.
Is inserted from the offset position on the X1 side, and the detection pin 8 is
When pushed in one direction, the lock drive arm 66 to which the detection pin 8 is connected rotates clockwise, and the lock lever 6 is driven by the drive pin 67 provided on the lock drive arm 66.
3 is pushed in the X2 direction, the lock pin 65 is separated from the first lock portion 61f, and the lock of the positioning slider 61 is released. However, as shown in FIG. 14, when the small diameter disk DS is fed in the Y1 direction by the rotational force of the roller 5, the detection pin 8 immediately returns to the X2 direction because the disk diameter is small, and the lock drive arm 66 is also Returns counterclockwise. Therefore, when the small-diameter disk DS approaches the positioning pins 62a and 62b, the first lock portion 61f of the positioning slider 61 is always locked by the lock pin 65 as shown in FIG.

With the positioning slider 61 locked, the positioning pins 62a and 62
b is at a position where the small diameter disk DS can be positioned on the turntable T. Therefore, the small-diameter disk DS fed by the roller 5 hits the pair of positioning pins 62a and 62b in the locked state, and is positioned so that the center thereof coincides with the centers of the turntable T and the clamper 16. Further, as shown in FIG. 13, the small-diameter disc DS is inserted from a position offset to the left, and
When the small-diameter disk DS is inserted from a position deviated rightward and is directly fed by the roller 5, the leading end of the disk DS hits only one of the positioning pins 62a or 62b. However, since the center of the roller 5 is thinner, the small-diameter disc DS fed in one-sided position is corrected by using the locating pin 62a or 62b as a fulcrum, and as shown by a solid line in FIG. The disk DS reaches a position corresponding to the pair of positioning pins 62a and 62b, and is reliably positioned on the turntable.

When the small-diameter disc DS is positioned on the positioning pins 62a and 62b as shown in FIG. 14, the detection pin 58 provided on the positioning detection arm 56 is moved to Y1 by the tip on the center line OO of the disc DS. Pushed in the direction. Since the positioning slider 61 is in the locked state,
The positioning detection arm 56 on which the detection pin 58 is pressed is rotated in the counterclockwise direction ((i) direction) with the driving pin (third connecting portion) 61d provided on the positioning slider 61 as a fulcrum, and positioning is performed. The detection arm 56 is at the first detection position. Therefore, the trigger arm 54 connected to the positioning slider 61 is rotated clockwise (direction). As with the introduction of the large-diameter disk DL,
By turning the trigger arm 54 in the direction, the trigger lever 25 is slightly moved in the Y1 direction, whereby the first switching lever 22 of the power switching mechanism B is slightly moved in the direction as shown in FIG. 6B, the idle gear 35 meshes with the switching gear 21, and the switching gear 21 is driven in the CW direction, as shown in FIG.

The rotation of the switching gear 21 in the CW direction causes
First, the second switching lever 23 rotates in the direction shown in FIG. 5A by the second cam 21c of the switching gear 21, the load slider 28 moves in the Y2 direction, and the roller arm 41 is turned counterclockwise by the guide groove 28b. The roller 5
, The feed force to the disc DS is released. Almost at the same time, the disc DS is clamped by the clamper 16 and the turntable T. At this time, the first lock portion 61f of the positioning slider 61 is
5, the discharge force in the Y2 direction does not act on the disk DS after the roller 5 separates from the disk and the clamping force of the disk is released and before the disk DS is clamped. .

After the second switching lever 23 stops at the position shown in FIG. 5A, the first switching lever 2 is moved by the first cam 21b.
2 is driven counterclockwise to reach the position shown in FIG.
During this time, the trigger lever 25 connected to the first switching lever 22 is driven in the Y1 direction. The moving force of the trigger lever 25 in the Y1 direction is transmitted from the rack 25d to the control rotator 75, and the control rotator 75 is driven clockwise from the state shown in FIG.

When the control rotator 75 rotates clockwise from the state shown in FIG. 14, first, the lock lever 63 is driven in the X2 direction by the lock control cam 75a, and the lock pin 65 is rotated.
Is released from the first lock portion 61f, and the lock of the positioning slider 61 is released. Thereafter, the end portion 68a of the drive arm 68 is pushed by the drive cam 75b of the control rotator 75, and the drive arm 68 is driven counterclockwise. As a result, as shown in FIG. 15, the positioning slider 61 connected to the drive arm 68 is moved in the Y1 direction (
Direction), and the positioning pins 62a and 62b reach the retreat position where they are separated from the small-diameter disk DS. At this time, the positioning detection arm 56 connected to the positioning slider 61 is pushed in the Y1 direction by the positioning slider 61, and the positioning detection arm 56 is
And rotates to the same position as in the state where the loading of the large-diameter disk DL is completed as shown in FIG.

As shown in FIG. 5B, after the first switching lever 22 rotates counterclockwise, as shown in FIG. 5C, the rotation of the switching gear 21 in the CW direction causes the second switching lever 21 to rotate in the CW direction. The switching lever 23 further rotates in the counterclockwise direction, the roller arm 41 is further rotated in the counterclockwise direction by the load slider 28, and the disk drive unit is unlocked to be in a floating state. Further, the idle gear 35 is controlled by the escape guide portion 36c of the second switching lever 23.
Is separated from the switching gear 21, and the motor stops.

(Discharge Operation of Small Diameter Disk DS) When a command to discharge the small diameter disk is issued, the large diameter gear 33 is driven counterclockwise by the motor in the state shown in FIG. The idle gear 35 meshes with the switching gear 21 by rotating counterclockwise, and the switching gear 21
Driven in the CW direction.

When the switching gear 21 rotates in the CCW direction, first, the second switching lever 23 is moved from the state shown in FIG.
(B), the load slider 28 moves in the Y1 direction during this time, the roller arm 41 is rotated in the clockwise direction, and the roller 5 of the small-diameter disc DS in the clamped state is rotated. It reaches the position corresponding to the lower surface. Further, the disk drive unit changes from the elastic floating state to the locked state. Thereafter, the second switching lever 23 is moved to the position shown in FIG.
(B), and then the CCW of the switching gear 21
By the rotation in the direction, the first switching lever 22 rotates clockwise to reach the state shown in FIG. During this time, the trigger lever 25 connected to the first switching lever 22 moves in the Y2 direction, and the control rotator 75 is rotated counterclockwise by the rack 25d of the trigger lever 25.

When the control rotator 75 rotates counterclockwise from the state shown in FIG. 15, the drive cam 75b formed on the control rotator 75 comes off the end 68a of the drive arm 68, and the drive arm 68 is returned to the return spring. It is rotated clockwise by the elastic force of 72. Therefore, the positioning slider 61 connected to the drive arm 68 is also returned in the Y2 direction. Immediately before the positioning slider 61 is returned to the position shown in FIG. 14, the lock control cam 75a of the control rotator 75 is disengaged from the left end 63c of the lock lever 63, and the lock lever 63 is returned in the X1 direction by the lock spring 64. The lock pin 65 is fitted into the first lock portion 61f, and the positioning slider 61 is moved to the position shown in FIG.
Locked in the position shown in.

When the positioning slider 61 is locked at the position shown in FIG. 14, the first switching lever 22 is
The position shown in FIG. Subsequent CC of the switching gear 21
In the rotation in the W direction, the first switching lever 22 is moved to the position shown in FIG.
And the second switching lever 23 is rotated clockwise as shown in FIG. 4B. At this time, the load slider 28 is driven in the Y1 direction by the second switching lever 23, the holding of the roller arm 41 is released by the guide groove 28b, and the roller arm 41 is rotated clockwise by the spring 43. At the same time, the clamper 16 is released from the turntable and the disk is released from being clamped. Then, the disk DS is sandwiched between the roller 5 and the roller pad 44, and is ejected to a predetermined position by the rotating force of the roller 5. At this time, the disk positioning mechanism E remains in the state shown in FIG. After that, as shown in FIG.
1 and the motor stops, and returns to the standby state shown in FIGS.

[0096]

As described above, according to the present invention, both the detection completion operation of the small-diameter disk and the detection completion operation of the large-diameter disk can be performed by the positioning detecting member which moves together with the positioning member. Therefore, the operation of completing the positioning of the two disks can be performed by the common positioning detection member, and the positioning detection mechanism can be simplified.

In particular, when the trigger member is operated by the positioning detection member to start the power switching mechanism, no switch or the like is required, and the structure of the apparatus can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a housing of a disk drive according to the present invention;

FIGS. 2A and 2B are partial plan views showing a detection operation of a large-diameter disc by an insertion detection mechanism;

FIG. 3 is a partial plan view showing an operation of detecting a small-diameter disc by an insertion detection mechanism.

FIG. 4 is a side view of a housing showing a power switching mechanism;
(A) shows a standby state, and (B) shows a state in which the switching gear is started.

FIG. 5 is a side view of a housing showing a power switching mechanism;
(A) shows the transfer force releasing and clamping operation, (B) shows the retracting operation of the positioning member, and (C) shows the unlocking operation of the disk drive unit.

FIG. 6A is an enlarged side view of a power switching mechanism, FIG. 6B is an enlarged side view showing an engaged state of gears of the power switching mechanism,

FIG. 7 is a plan view showing a disk positioning mechanism, showing a standby state;

FIG. 8 is a plan view showing a disk positioning mechanism, showing a state in which a large-diameter disk is introduced;

FIG. 9 is a plan view showing the disk positioning mechanism, showing a state where the large-diameter disk is positioned and the positioning detection member has reached the second detection position.

FIG. 10 is a plan view showing a disk positioning mechanism;
Shows the state where the positioning member has moved after the large-diameter disk has been positioned,

FIG. 11 is a plan view showing a disk positioning mechanism;
Before the large-diameter disc is ejected, the positioning member has moved in the return direction,

FIG. 12 is a plan view showing a disk positioning mechanism;
Shows the state in which the large-diameter disc is transferred in the ejection direction,

FIG. 13 is a plan view showing a disk positioning mechanism;
Shows the state in which the small-diameter disc is inserted offset,

FIG. 14 is a plan view showing a disk positioning mechanism;
The small-diameter disk is positioned and the positioning detection member is
Indicating the state where the detection position has been reached,

FIG. 15 is a plan view showing a disk positioning mechanism;
Shows the state where the positioning member has moved after the small-diameter disk has been positioned,

FIG. 16 is a side view showing a disk clamp mechanism, showing a clamp release state;

FIG. 17 is a side view showing the disk clamp mechanism, showing a disk clamp completed state;

FIG. 18 is a side view showing a lock mechanism of the disk drive unit, showing a locked state;

FIG. 19 is a side view showing a lock mechanism of the disk drive unit, showing an unlocked state;

[Explanation of symbols]

 DS Small-diameter disk DL Large-diameter disk A Insertion detection mechanism B Power switching mechanism E Disk positioning mechanism SW1, SW2 Detection switch T Turntable U Disk drive unit M Spindle motor 1 Housing 2 Nose 4 Ceiling plate 5 Roller (transporting means) 6, 7 Detection Arm 8, 9 Detection Pin 14 Unit Chassis 15 Clamp Arm 15c, 15d Other Positioning Part 16 Clamper 21 Switching Gear 21a Trigger Protrusion 21b First Cam 21c Second Cam 22 First Switching Lever 23 Second Switching Lever 25 Trigger Lever 28 Load slider 32 Drive gear 33 Large diameter gear 34 Swing arm 35 Idle gear 36 Guide hole 41 Roller arm 54 Trigger arm 56 Positioning detection arm (positioning detection member) 56a Arc hole (second connecting portion) 5 Connection pin (first connection portion) 61 Positioning slider (positioning member) 61d Drive pin (third connection portion) 61f First lock portion 61g Second lock portion 63 Lock lever (lock member) 64 Lock spring 65 Lock pin 66 Lock drive arm 68 Drive arm 72 Return spring 75 Control rotator 75a Lock control cam 75b Drive cam (drive means) 75c Pinion gear 81 Rotating cam 81a Clamp cam 81b Lock cam 85 Lock slider

Claims (4)

[Claims] 1. A rotary drive for clamping a large-diameter disk (DL) and a small-diameter disk (DS), a head opposed to the disk clamped by the rotary drive, and both a large-diameter disk and a small-diameter disk. Transfer means for transferring to the rotary drive, and a large-diameter disk (DL) at a standby position for positioning the periphery of the small-diameter disk (DS) when the center of the small-diameter disk (DS) reaches the rotary drive; When a small-diameter disk (DS) is positioned by the positioning member (61) at the standby position in a disk device provided with a positioning member (61) that is moved from the standby position when When the small-diameter disk (DS) is moved by a predetermined amount to the first detection position, and the positioning member (61) moves from the standby position, A positioning detection member (56) that moves together with the positioning member (61) and becomes a second detection position when the center of the large-diameter disk reaches the rotation drive unit.
When the positioning detection member (56) reaches the first detection position, and when the positioning detection member (56) reaches the second detection position, the positioning detection member (56). A power switching mechanism (B) that is started by the movement to each of the detection positions described above, wherein the mechanism switching operation is performed by the power switching mechanism (B). 2. The method according to claim 1, wherein the positioning detecting member (56) is a first detecting member.
And when the positioning detection member (56) reaches the second detection position, the trigger member (5) moved by the positioning detection member (56)
3. The disk device according to claim 2, wherein the power switching mechanism is switched to a starting state by the moving force of the trigger member. 3. A first connecting portion (57) between the positioning detecting member (56) and the trigger member (54), and a first connecting portion (57) between the positioning detecting member (56) and the fixing portion (4). The second connecting portion (56a) which allows the rotation of the positioning detection member (56) about the connecting portion (57) of the
A third connecting portion (61d) is provided between the positioning detecting member (56) and the positioning member (61), and the positioning detecting member (56) pushed by the small-diameter disk (DS) is connected to the third connecting portion. (61d) rotates about the fulcrum to the first detection position, and when the positioning member (61) is moved from the standby position, the positioning detection member (56) is moved to the first detection position.
When the large-diameter disk (DL) is positioned, the second connecting portion (56a) reaches the limit position of the predetermined range, and the positioning detecting member (56) 3) The disk device according to claim 1 or 2, wherein the disk drive rotates about the second connecting portion (56a) as a fulcrum and becomes a second detection position. 4. A driving means (75b) for moving the positioning member (61) in a direction away from the disk, and when the power switching mechanism (B) is started, the driving means is switched from the power switching mechanism (B) to the driving means. The power is transmitted to (75b), and the positioning member (61) is moved in a direction away from the small-diameter disk (DS) or the large-diameter disk (DL) after the clamping is completed. Disk device.