JP3423064B2 - Drive for recording medium - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a plurality of recording media such as discs housed in a cartridge or discs not housed in a cartridge installed in a standby section. The present invention relates to a drive device for a recording medium that is selected and driven, and more particularly to a drive device for a recording medium in which the structure of a mechanism portion that selectively moves a drive unit can be downsized.

[0002]

2. Description of the Related Art FIG. 13 is a side view showing an internal structure of a recording medium driving device (disc device) in which a plurality of discs D housed in a cartridge C as recording media are loaded. In this type of disk device, a plurality of cartridges C are arranged side by side in a standby portion 2 of a recording medium provided in a housing 1. A drive unit 3 is provided inside the housing 1. In the drive unit 3, a holder for holding the cartridge C introduced from the standby unit 2, a turntable on which a disk in the cartridge C is installed,
A spindle motor that rotationally drives the turntable and a head that faces the disk exposed from the cartridge C are mounted.

The Y direction shown in FIG. 13 is the selection direction,
When the drive unit 3 moves in the selection direction, it faces one of the cartridges C in the standby unit 2. Case 1
Support elongated holes 1a, 1a extending linearly along the selected direction (Y direction) are formed therein, and the support shafts 4, 4 provided on the drive unit 3 are inserted into the support elongated holes 1a, 1a. ing. A drive lever 5 supported so as to be movable in the X1-X2 direction is provided in the housing 1, and step-shaped guide holes 6 and 6 are formed in the drive lever 5. From the top, the respective guide holes include a first-stage parallel portion 6a, a first-stage inclined guide portion 6b, a second-stage parallel portion 6c, a second-stage inclined guide portion 6d, and a third-stage parallel portion 6e. Are continuously formed. Each of the parallel portions 6a, 6c, 6e is oriented horizontally (X1-X2 direction). A rack 7 is fixed to the drive lever 5, and a pinion gear 8 driven by a motor meshes with the rack 7. The rotation of the pinion gear 8 drives the drive lever 5 in the X1-X2 directions.

In FIG. 13, the drive lever 5 moves in the X2 direction, and the respective support shafts 4 are located in the parallel portion 6a of the first stage. At this time, the drive unit 3 is stopped at a position where the uppermost cartridge C in the standby unit 2 can be selected. When the drive lever 5 is driven in the X1 direction, the support shaft 4 is guided by the first-stage tilt guide portion 6b and descends along the support elongated hole 1a. When the support shaft 4 is located in the parallel portion 6c of the second stage, the drive unit 3 drives the cartridge C in the second stage from the top.
Stop at the selected position. When the drive lever 5 is further driven in the X1 direction, the support shaft 4 moves to the second stage tilt guide portion 6d.
When the support shaft 4 passes through the inside and descends, the support shaft 4 is positioned inside the third parallel portion 6e and stopped, the drive unit 3 comes to the selected position facing the lowermost cartridge C. In this conventional example,
The guide holes 6 of the drive lever 5 have parallel portions 6a, 6 respectively.
When c and 6e are formed and the support shaft 4 is held in any of the parallel portions, the height position in the Y direction is determined, and thereby the drive unit 3 is positioned at the selected position for each cartridge C. It is like this.

[0005]

In the conventional example shown in FIG. 13, in order to move the support shaft 4 provided in the drive unit 3 from the parallel portion 6a of the first stage to the parallel portion 6e of the third step, a guide is used. The drive lever 5 must be moved by the same distance as the length dimension L0 of the hole 6 in the X1-X2 direction. However, the guide hole 6 has a parallel portion 6 for positioning the drive unit 3 at the selected position of each cartridge C.
Since a, 6c, and 6e are provided, the length dimension L0 is increased by the length dimension L1, L2, and L3 of the respective parallel portions, and the drive lever 5 in the housing 1 is increased.
The moving area in the X1-X2 direction is long. If the movement area of the drive lever 5 extends over a long range, the arrangement of other components in the housing 1 is restricted accordingly, and it becomes difficult to design the arrangement of each mechanism in the housing. Therefore, it is difficult to reduce the size of the housing 1.

The guide hole 6 has inclined guide portions 6b and 6d extending obliquely and linearly and parallel portions 6a, 6c and 6e extending linearly in the X1-X2 direction. , And the internal passage of the guide hole 6 is angularly bent at the boundary point between the linear parallel portion. Therefore, when the support shaft 4 passes through this boundary point, the drive load of the drive lever 5 increases. When the support shaft 4 passes the boundary point, the load increases, and when the support shaft 4 moves in the parallel portion 6c, the load suddenly decreases. A rattling may occur in the movement of the lever 5 and smooth driving cannot be performed. Since the load acting on the drive lever 5 varies greatly as described above, the meshing portion between the pinion gear 8 and the rack 7 is likely to be worn, and the power transmission portion from the output shaft of the motor to the pinion gear 8 is provided. Wear is likely to occur in the meshing portion of the gears in the reduced gear mechanism. Further, the inner edge portion of the guide hole 6, particularly the inner edge portion of the boundary portion which is bent angularly, is likely to be worn by sliding with the support shaft 4.

The present invention has been made to solve the above-mentioned conventional problems, and the driving distance is set such that the moving distance of the parallel portion for positioning the driving unit at the selected position is not included in the moving distance of the driving member. An object of the present invention is to provide a drive device for a recording medium, which can shorten the moving distance of the member and can move the drive member more smoothly than before.

[0008]

This onset Akira [SUMMARY OF] has a standby section of a plurality of stages of serial <br/> recording medium respectively is installed, either the
A drive unit for driving a recording medium that will be introduced from the standby unit, and a drive member for reciprocating <br/> moved in the direction crossing the moving direction of the drive unit, a rotating cam <br/> for driving said drive member , A drive source for rotating the rotary cam is provided, and the reciprocating force of the drive member is applied to the drive member.
The drive unit is converted into the moving force of the drive unit.
Select positions in multiple stages facing each of the multiple standby units
An inclined guide portion for guiding to
Is the reciprocating direction of the drive member and the drive unit
Inclination in both directions of movement, with multiple drive units
Within the range of movement passing through the selected position of
The inclination angle of the guide part does not change and is set to a constant angle.
Ri, wherein the rotating cam includes a circular arc portion of the plurality of stages which are formed along the circular path of the semi <br/> diameter different to that center of rotation, different
Contact with a drive unit which connects between the radius of the circular arc portion is provided comprising
The drive unit is in one of the selected positions
Sometimes the arcuate portion restrains the drive member,
When the drive unit rotates, the drive unit causes the drive unit to move.
The material is characterized in that it can be moved between adjacent selected positions .

Further , the rotating shaft of the rotating cam is the drive shaft.
It is arranged orthogonal to the reciprocating direction of the member, and
A cam groove having the circular arc portion and the drive portion on the rolling cam
And the sliding protrusion provided on the driving member is
It is preferable that the guide groove is directly driven by the cam groove.
Yes.

For example, a long hole or a long groove or a rail-shaped tilt guide portion which is inclined with respect to the selected direction is provided on the drive member side, and a pin which slides in the long hole or the long groove as a guided portion is provided on the drive unit side. A sliding portion that slides on the projection, the roller, or the rail may be formed. On the contrary, the drive unit side is provided with an elongated hole or groove extending obliquely with respect to the selected direction, or a rail-shaped inclined guide portion, and the drive member side is a pin that slides in the elongated hole or groove as a guided portion, Protrusion,
You may form the sliding part which slides a roller or a rail.

Further, as the power conversion unit, a link having a bending point in the middle for deforming a dogleg is provided, a lower end of which is supported by a chassis, a drive unit is supported on an upper end thereof, and a driving member is a dogleg deforming link. May be connected to the bending point, and the angle of the doglegged deformation of the link may be changed by the moving force of the drive member, thereby raising and lowering the drive unit. Alternatively, the drive unit may be supported so as to be movable by the pantograph mechanism with respect to the chassis, and the deformation state of the pantograph mechanism may be changed by the moving force of the drive member, thereby moving the drive unit.

Further, the arcuate portion provided on the cam portion for restraining the driving member means that, for example, when the cam portion is a cam groove, the projection or the pin formed on the driving member is held in the cam groove. It can be realized by Further, when the cam portion is a rail-shaped cam, the drive member may be provided with a recess that fits into and slides on the rail-shaped cam.

[0013]

In the above means, when the cam portion is rotated by the drive source such as the motor, the drive member is guided by the cam portion, and the moving force of the drive member is converted by the power conversion portion, so that the drive unit is The recording medium is moved in the direction that allows selection. When the drive member is moved by the drive unit formed on the cam unit, the drive unit moves in the selection direction. When the rotation of the cam part is stopped when the driving member is constrained by the arc part of the cam part,
The drive member is positioned immovably. Therefore, the drive unit is restrained via the power conversion unit without rattling, and the drive unit is accurately positioned at a position where any recording medium can be introduced.

Therefore, the power conversion section does not require a section for positioning the drive unit, such as the parallel sections 6a, 6c and 6e shown in FIG. As much as this is unnecessary,
The moving distance of the drive member can be shortened. Since the moving range of the drive member can be shortened within the limited space in the housing, the mechanism can be efficiently arranged in the housing or the chassis, and the degree of freedom in design is increased.

Further, when the rotating cam portion is used, the connecting portion between the arc portion and the drive portion can be connected in a curved shape, so that when the drive member is guided from the arc portion of the cam portion to the drive portion, The fluctuation of power can be made smaller than that of the drive lever of No. 13. Therefore, the movement of the drive member is smooth, and the power conversion unit is less likely to wear. In addition, the wear at the meshing portion of the gear in the power transmission portion of the motor is reduced.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a mechanical portion of an in-vehicle disk drive device as an example of a recording medium drive device according to the present invention, FIG. 2 is a side view of a chassis shown in FIG. 1, and FIG.
(B) is a plan view of a rotating body. FIG. 1 shows a metal chassis 10 incorporated in the housing of a vehicle-mounted disk device. A case (not shown) in which the metal chassis 10 is built is a so-called 1 din.
The size is such that it is embedded in the console panel of an automobile. Therefore, the metal chassis 10 also has a limited size that can be stored in this housing.

A storage box 11 is provided at the front position of the chassis 10.
Is fixed. The inside of the storage box 11 is partitioned by a plurality of partition members 11a, and is divided into the first from the upper side to the lower side.
Standby portions A1 to A6 of the sixth stage are formed. The recording medium used in this embodiment is a cartridge C.
The disk D is stored in the disk, and is, for example, a so-called mini disk. In the embodiment of FIG. 1, the storage box 11 is fixed in the chassis 10. Therefore, the front surface of the housing, that is, the front surface of the housing embedded in the console panel of the automobile has an insertion opening facing the inside of the vehicle, and each cartridge C serving as a recording medium is provided with an individual standby portion from this insertion opening. It is directly inserted into A1 to A6 by hand. A holding mechanism such as a leaf spring that temporarily holds the inserted cartridge C is provided in each of the standby portions A1 to A6. Further, the present invention is not limited to one in which the storage box 11 is fixed to the chassis 10, and for example, a magazine type storage box 11 in which a plurality of cartridges or discs not having a cartridge are stored in advance,
It may be loaded from the outside of the housing into the chassis 10 and can be optionally discharged.

As shown in FIG. 1, the rear side of the chassis 10 is a selective movement area B of the drive unit 20.
In this selective movement area B, the drive unit 20 moves in the vertical direction (Y1-Y2) in the figure. Therefore, Y1-Y2
The direction is the selection direction of the drive unit 20, and when the drive unit 20 moves in the selection direction indicated by Y1-Y2, the cartridge C located in any one of the standby portions is selected. As shown in FIG. 1, the drive unit 20 is provided with a unit base 21.
Inside, a mechanism base 22 is supported via dampers 23, 23. The mechanism base 22 is provided with a cartridge holder 24 into which the waiting cartridge C is introduced inside any one of the standby portions A1 to A6.
On the mechanism base 22, a turntable in which the center of the disk D in the cartridge C introduced into the cartridge holder 24 is installed, a spindle motor that drives the turntable to rotate, and recording of the disk exposed from the window of the cartridge C. A head for performing a reproducing operation or a recording / reproducing operation is mounted facing the surface.

Each of the dampers 23, 23 has a bag body made of rubber or the like in which highly viscous fluid such as oil or air is sealed, and a shaft 22a fixed to the mechanism base 22 is provided in the bag body. Has been inserted. The mechanism base 22 is elastically supported in the unit base 21 via a damper 23. Due to this elastic support, even if vibration of the vehicle body or the like acts on the unit base 21 via the chassis 10, the head mounted on the mechanism base 22 is less likely to be affected by the vibration. A pair of support shafts 25, 25 as guided portions are fixed to the left side surface of the drive unit 20. The left side plate 10a of the chassis 10 is provided with a pair of support elongated holes 12, 12 for supporting the support shaft 2
Reference numerals 5 and 25 are inserted into the support slots 12, 12. The support slots 12 and 12 are arranged in the selected direction (Y1-Y2).
Direction) and the support slot 1
The unit base 21 of the drive unit 20 by 2 and 12
Are supported so as to be movable in the Y1-Y2 directions.

Although not shown in FIG. 1, the chassis 1
Similarly, the support elongated holes 12 and 12 are also formed in the right side plate 10b of 0, and the support shafts 25 and 25 (guided portions) provided on the right side surface of the unit base 21 of the drive unit 20 are similar to the right side plate 10b. Are inserted into the support elongated holes 12, 12.
Therefore, the drive unit 20 includes the left and right side plates 1 of the chassis 10.
It is movably supported in the Y1-Y2 directions with respect to 0a and 10b. The support slot 12 is the drive unit 2
Although it has a function as a guide support portion that guides 0 in the selected direction, the guide support portion is not limited to the support elongated hole 12 and may be another. Chassis 1
A plurality of guide support shafts or guide shafts extending in the Y1-Y2 direction within 0 are provided, and the unit chassis 21 of the drive unit 20 has the guide support shafts or guide shafts Y1-Y.
It may be inserted so as to be movable in two directions.

Below the drive unit 20, a first drive member 30 and a second drive member 40 are provided. Each of the driving members 30 and 40 is a slider frame or a lever frame formed by bending a U-shaped sheet metal material. A left side plate 30a and a right side plate 30b are formed on the first driving member 30, and a left side plate 40a and a right side plate 40b are formed on the second driving member 40, respectively. Bottom plate 30c of the first drive member 30
Are stacked on the bottom plate 40c of the second drive member 40. Both side plates 30a and 30b of the first drive member 30 are
Are superposed on the inner sides of both side plates 40a and 40b of the second drive member 40. The left side plates 30a and 40a that are stacked together are interposed between the left side plate 10a of the chassis 10 and the left side surface of the unit base 21 of the drive unit 20, and the right side plate 30b and the right side plate 40b are formed. The stacked ones are the right side plate 10b of the chassis 10 and the unit base 2
1 and the right side plate.

FIG. 1 shows the left side plate 3 of the first drive member 30.
0a and the guide mechanism provided on the left side plate 40a of the second drive member 40 are shown, but the right side plate 30b of the first drive member 30 and the right side plate of the second drive member 40 are shown. 40b is also provided with a similar guide mechanism. Therefore, in the following, the left side plate 30a and the left side plate 40a are
The description will be given mainly on the mechanism for the guide provided on the right side plate, but the structure for the guide on the right side plate 30b and the right side plate 40b is the same as that described below. A pair of guide shafts 31, 31 is provided on the outer surface of the left side plate 30a of the first drive member 30.
Is fixed. Left side plate 40a of the second drive member 40
Guide elongated holes 41, 41 are formed in the chassis 10, and the chassis 10
Guide slots 13 and 13 are also formed on the left side surface 10a. As shown by the assembly line (* 1), the guide shaft 3
1, 31 are inserted in the guide slots 41, 41, and are further inserted in the guide slots 13, 13. The guide slot 4
1, 41 and the guide slots 13, 13 are the same as the selection direction (Y1
It extends along the horizontal direction (X1-X1 direction) orthogonal to the (-Y2 direction). Therefore, for chassis 10,
The first drive member 30 and the second drive member 40 are movable independently in the X1-X2 direction independently of each other.

On the left side plate 30a of the first drive member 30,
A pair of guide holes 32, 32 are formed. Each guide hole 32 has a first inclined guide portion 32a and a first relief portion 3a.
2b are continuous. As shown in FIG. 2, the first tilt guide portion 32a is a tilted oblong hole that is slanted to the right,
The first escape portion 32b is in the selection direction (Y1-Y2 direction).
It is a straight long hole extending parallel to. That is, the escape portion 32b
(Escape portion 42a described below) is an escape long hole. The left side plate 40a of the second drive member 40 has a pair of guide holes 4
2, 42 are formed. Each of the guide holes 42 is formed by connecting a second relief portion 42a and a second inclined guide portion 42b. The second relief portion 42a is arranged in the selection direction (Y1
It is a straight elongated hole extending parallel to the (Y2 direction). The second slant guide portion 42b is a slanted hole that is slanted to the right.
As shown in FIG. 2, the first tilt guide portion 32a and the second tilt guide portion 42b are formed at the same tilt angle.

As shown by the assembly line (* 2) in FIG. 1, the support shafts 25, 25 fixed to the unit base 21 of the drive unit 20 have guide holes 32, 32 for the first drive member 30. And the guide hole 4 of the second drive member 40.
After passing through the insides of Nos. 2 and 42, they are inserted into the supporting elongated holes 12 formed in the left side plate 10a of the chassis 10 as described above. In this embodiment, the support shaft 25, which is the guided portion on the driven unit 20 side, and the first inclined guide portion 32a select the moving force of the first driving member 30 in the X1-X2 direction of the driving unit 20. A power conversion unit that converts the moving force in the direction is formed, and the support shaft 25 and the second tilt guide unit 42b form X1-X2 of the second drive member 40.
A power conversion unit configured to convert the moving force in the direction to the moving force in the selected direction of the drive unit 20 is configured.

As shown in FIG. 2, a drive mechanism 50 is provided in the chassis 10 below the storage box 11. The first drive member 30 and the second drive member 40 are
The drive mechanism 50 reciprocates in the X1-X2 direction. The drive mechanism 50 includes a motor 51 serving as a power source,
A worm gear 52 provided on the output shaft of the motor 51,
It is composed of a reduction gear group 53 for decelerating and transmitting the rotation of the worm gear 52, and a rotating body 54. Rotating body 5
Reference numeral 4 denotes a spur gear around which teeth 54a are formed, and the pinion gear 53a at the final stage of the reduction gear 53 meshes with the teeth 54a. The rotator 54 is rotationally driven in both forward and reverse directions by the power of the motor 51. The rotating body 5
4 is made of a resin material or the like, and an upper shaft 55a and a lower shaft 55b are integrally projected at the center thereof. The upper shaft 55a is rotatably supported by a bearing portion provided below the storage box 11. Also the lower shaft 55b
Are elongated holes 33 formed in the bottom plate 30c of the first driving member 30 along the X1-X2 direction, and lengths formed in the bottom plate 40c of the second driving member 40 along the X1-X2 direction. It is inserted in the hole 43. Further, the lower end of the lower shaft 55b is rotatably supported by a bottom plate chassis (not shown) installed below the chassis. The slots 33 and 43
Is an escape hole for preventing the drive members 30 and 40 from interfering with the lower shaft 55b.

A first cam portion 56 is formed by a groove on the lower surface of the rotating body 54. As shown by (* 3) in FIG. 1, the sliding protrusion 34 fixed to the bottom plate 30c of the first driving member 30 is inserted into the groove of the first cam portion 56. When the rotating body 54 rotates, the sliding protrusion 34 moves in the first cam portion 56, and the first driving member 30 moves X1-X2.
Driven in the direction. A second cam portion 57 is formed by a groove on the upper surface of the rotating body 54. The second drive member 40 is integrally provided with an arm 40d that is raised from the end of the bottom plate 40c and extends above the rotating body 54. As shown by (* 4) in FIG. 1, the sliding protrusion 44 fixed to the lower surface of the arm 40d is inserted into the groove of the second cam portion 57. When the rotating body 54 rotates, the sliding protrusion 44 moves in the second cam portion 57, and the second driving member 40 moves X1.
Driven in the -X2 direction.

3 (A) and 3 (B) both show the rotating body 54.
3B is a plan view of FIG. 3A, only the second cam portion 57 is illustrated in FIG. 3A and only the first cam portion 56 is illustrated in FIG. 3B in order to facilitate understanding of the shape of the cam portion. Shows. In each of FIGS. 3A and 3B to FIG.
The rotation angle (rotational phase) of (1) is shown in comparison with the X1-X2 direction in the figure with reference to the X1-X2 direction. In each drawing, the left-right direction of the drawing is the X1-X2 direction. Figure 3
As shown in (B), the first cam portion 56 includes the rotating body 54.
From the outer peripheral side to the center O of the
a, drive unit 56b, second-stage arc portion 56c, drive unit 56
d, a third-stage arc portion 56e, a drive portion 56f, and a delivery arc portion 56g, and grooves are continuously formed in each portion.

The width centers (groove centers) of the circular arc portions 56a, 56c, 56e, 56g are respectively radii r1 and R1 with respect to the center O.
It coincides with the arc loci of r2, r3, and r4. Therefore, the sliding protrusion 34 has the circular arc portions 56a, 56c, 56e, 5
Located within any of the widths of 6 g (inside the groove), and the rotating body 5
4 is stationary, the first drive member 30 is X1-X
Positioning is performed in the same direction without moving in the two directions. That is, the width of the first cam portion 56 (groove width dimension) and the outer diameter dimension of the sliding protrusion 34 are machined with high accuracy, so that the sliding protrusion 34 moved to each arc portion has X1-.
It will be positioned in the X2 direction. This also applies to the relationship between the second cam portion 57 and the sliding protrusion 44. In addition, the sliding protrusion 34 is connected to the driving portions 56b, 56d, 56.
When located within one of the widths (inside the groove) of f, the first drive member 30 moves to X1 depending on the rotation direction of the rotating body 54.
Direction or X2 direction.

As shown in FIG. 3 (A), the second cam portion 5
Numeral 7 indicates a circular arc portion 57a for transfer, a driving portion 57b, a circular arc portion 57c of a fourth stage, a driving portion 57d, a circular arc portion 57e of a fifth stage, and a driving portion 57f in order from the inner peripheral side with respect to the center O of the rotating body 54. , A circular arc portion 57g of the sixth stage, and grooves are continuously formed in each portion. Arc parts 57a, 57c, 5
The width center (groove center) of each of 7e and 57g is the center O
On the other hand, it coincides with an arc locus of radius r4, r3, r2, r1. Note that the radii r1, r2, r in FIG.
3 and r4 are the radii r1, r2, r in FIG.
This means that the distance is the same as that of r3 and r4. That is, in the plan view of FIG. 3, the first cam portion 56
The second cam portion 57 is symmetrical with respect to the center O in the X1-X2 direction.

The sliding protrusion 44 has arcuate portions 57a, 57
When the rotor 54 is positioned within the width (groove) of any of c, 57e, and 57g, and the rotating body 54 is stopped, the second drive member 40 does not move in the X1-X2 direction but moves in the same direction. Is positioned. The sliding protrusion 44 is the drive unit 57.
When located in the width (inside the groove) of any of b, 57d, and 57f, the second drive member 40 is driven in the X1 direction or the X2 direction according to the rotation direction of the rotating body 54. When the drive unit 20 is moved in the selection direction (Y1-Y2 direction) by the guide operation of the drive members 30 and 40, and the cartridge holder 24 in the drive unit 20 faces any one of the standby portions A1 to A6. However, any one of the cartridges C in the standby units A1 to A6 can be selected. Although omitted in FIG. 1, a transfer mechanism that moves in the Y1-Y2 direction together with the drive unit 20 is provided. When the cartridge holder 24 faces any one of the standby portions, the transfer mechanism causes the cartridge C at the standby position to move to the cartridge holder 24.
The cartridge C, which has been introduced into the cartridge and has been completely regenerated, is returned to the original standby portion.

Next, the operation of the disk device will be described.
The selective movement for moving the drive unit 20 to a position where any of the cartridges C in the standby portions A1 to A4 can be selected is performed by operating the motor 51 in the drive mechanism 50. The power of the motor 51 is transmitted from the worm gear 52 through the reduction gear group 53 to the rotating body 54. When the rotating body 54 rotates, the position of the first drive member 30 is controlled by the first cam portion 56, and the second cam portion 5 is controlled.
The position of the second drive member 40 is controlled by 7. The position of the drive unit 20 in the selection direction (Y1-Y2 direction) is controlled by the respective drive members 30 and 40. When the rotating body 54 rotates in the α direction in FIG. 1, the drive unit 20 is moved in the Y1 selection direction. When the rotating body 54 rotates in the β direction, the drive unit 20 is moved in the Y2 selection direction. In FIG. 2, the drive unit 20 is Y2.
The cartridge holder 2 at the most moved position
4 is opposed to the standby section A1 of the first stage (uppermost stage), and is in a position where the cartridge C in the standby section A1 can be selected.

3 to 12, the selective movement operation of the drive unit 20 in the Y1 direction when the rotating body 54 rotates in the α direction starting from the position of FIG. 3 will be described. Figure 3
(A) and (B) show the rotation phase of the rotating body 54 when the drive unit 20 moves to the selected position of the first stage standby portion A1 shown in FIG. 8 through FIG. 3 through FIG. 4 and FIG.
While reaching the state, the rotating body 54 rotates approximately 180 degrees in the α direction. Further, starting from FIG. 8 as a starting point, and through FIG. 10 and FIG. 11 to FIG. 12, the rotating body 54 further rotates 180 degrees in the α direction. That is, starting from FIG. 3, 1 in the α direction in FIG.
FIG. 12 shows a state rotated by 80 degrees, and FIG. 12 shows a state rotated by 360 degrees in the α direction. In this embodiment, the standby units are A1 to A
Six cartridges C are provided in the storage box 11 as shown by 6, and six cartridges C are waiting in the storage box 11. However, until the rotating body 54 rotates 180 degrees from the state of FIG. 3 to the state of FIG. Selection of the cartridge C in the upper three standby sections A1, A2, A3 is performed. Further, while the rotating body 54 is rotated 180 degrees from the state shown in FIG. 8 to the state shown in FIG.
The cartridge C in 4, A5 and A6 can be selected.

First, while the rotating body 54 rotates 180 degrees in the α direction from the state shown in FIG. 3 to the state shown in FIG.
Moves (slides) the circular arc portion 57a for delivery of the second cam portion 57. Since the arc portion 57a is an arc locus having a constant radius r4 with respect to the center O of the rotating body 54, the second driving member 40 is not driven during this period, and the second driving member 40 is at the end position in the X2 direction. It remains stopped (the position shown in FIG. 2). At this time, as shown by the solid line in FIG. 2, the second relief portions 42a of the guide holes 42 provided in the second drive member 40 are aligned with the support elongated holes 12 formed in the chassis 10. There is. Therefore, during the state from FIG. 3 to FIG. 8, the escape portion 42a of the second drive member 40 continues to allow the movement of each support shaft 25, that is, the drive unit 20 in the selection direction (Y1 direction).

While the rotating body 54 rotates 180 degrees from the state of FIG. 3 to the state of FIG. 8, the first drive member 30 is
It is driven in the X1 direction by the first cam portion 56. First, in the state shown in FIG.
The first driving member 30 is located at the outermost first circular arc portion 56a of the cam portion 56, and the first driving member 30 is moved to the end portion in the X2 direction. Therefore, the first drive member 30 formed on the first
2 is located at the position indicated by the broken line in FIG. 2, the support shaft 25 is guided to the position (i) at the upper end of the first tilt guide portion 32a, and the drive unit 20 moves to Y2.
It is at the most elevated position in the direction. At this time, if the rotating body 54 is stopped, the cartridge holder 24 is stopped at a position where the cartridge C in the first-stage standby portion A1 can be selected. The first-stage arc portion 56a of the first cam portion 56 coincides with the arc locus of the radius r1 from the center O of the rotating body 54. Therefore, the width (groove width) of the first cam portion 56 and the sliding protrusion 3
If the outer diameters of the sliding protrusions 4 and 4 are formed with high accuracy, the sliding protrusion 34 can be positioned without moving in the X1-X2 direction in the state of FIG. Therefore, the first drive member 30
However, there is no rattling in this positioning state, and the drive unit 20 is accurately positioned at a position where the cartridge C in the first-stage standby portion A1 can be selected.

When the drive unit 20 is positioned at a position where the first-stage standby section A1 can be selected, the cartridge C in the first-stage standby section A1 is placed in the cartridge holder 24 by the above-mentioned transfer mechanism (not shown). Once introduced,
The center of the disk D in the cartridge C is the mechanism base 2
It is installed on the turntable provided in No. 2. In this state, the turntable and the disk D can be rotated by the spindle motor, and the reproducing operation can be performed by the head. When the reproduction is completed, the turntable and the disc D are disengaged from each other, and the cartridge C in the cartridge holder 24 is returned to the base standby portion A1 by the transfer mechanism. In the following, when the drive unit 20 is positioned at the selected position with respect to the other standby portions A2, A3, A4, A5, A6, the cartridge introduction, reproduction and return operations are the same as above.

While the rotating body 54 rotates in the α direction from the state shown in FIG. 3 to reach the state shown in FIG. 4, the sliding protrusion 34 is guided in the X1 direction by the drive portion 56b of the first cam portion 56, 1
The driving member 30 is driven in the X1 direction. At this time, the first tilt guide portion 32 provided on the first driving member 30.
6A is a view from the position indicated by the broken line in FIG. 2 toward the X1 direction.
Is moved to the position shown in FIG.
It is guided to 2a and lowered in the Y1 direction along the support slot 12. When the rotator 54 rotates to the phase shown in FIG. 4,
The support shaft 25 reaches the position indicated by (ii) in FIGS. 2 and 6. At this time, the cartridge holder 2 of the drive unit 20
4 is opposed to the standby section A2 of the second stage. When the rotating body 54 stops at the position shown in FIG. 4, the sliding protrusion 34 is located at the second-stage arc portion 56c. Since the circular arc portion 56c coincides with the circular locus of radius r2 with respect to the center O, the sliding projection 3
4 is constrained in the X1-X2 direction at the position shown in FIG. Therefore, the drive unit 20 is positioned at a position where the cartridge C in the second-stage standby portion A2 can be selected without the first drive member 30 moving. FIG. 6 shows the drive unit 20.
Shows a state in which the cartridge C in the standby section A2 of the second stage is stopped at a position where it can be selected.

Further, the rotary body 54 is changed from the state of FIG. 4 to the state of FIG.
When the sliding protrusion 34 is rotated to the state of (1), the sliding protrusion 34 is driven in the X1 direction by the driving portion 56d of the first cam portion 56 and reaches the circular arc portion 56e of the third stage. Along with this, the first drive member 3
When 0 is driven in the X1 direction and the sliding protrusion 34 reaches the circular arc portion 56e of the third stage, the support shaft 25 is lowered to the position indicated by (iii) in FIG. 2 by the first inclined guide portion 32a. To be made. When the support shaft 25 reaches the position (iii), the cartridge holder 24 of the drive unit 20 moves to the third position.
It faces the standby portion A3 of the step. When the rotating body 54 stops in the state shown in FIG. 5, the sliding protrusion 34 remains in the circular arc portion 56e of the third stage. Since the circular arc portion 56e of the third step coincides with the circular arc locus of the radius r3 with respect to the center O, the sliding protrusion 34 is constrained by the circular arc portion 56e of the third step, and the first drive member 30 is also constrained. Thus, the drive unit 20 is positioned at the position for selecting the cartridge C of the standby section A3 of the third stage. When the rotating body 54 rotates from the state shown in FIG. 5 to the state shown in FIG. 8, the sliding protrusions 34 move the drive portion 56f of the first cam portion 56.
Is guided in the X1 direction to reach the delivery arc portion 56g. The circular arc portion 56g is formed in a circular arc locus with a radius r4 from the center O, and the sliding protrusion 34 is formed on the circular arc portion 56g.
While located at g, the sliding protrusion 34 and the first driving member 30 do not move any more in the X1 direction.

As shown in FIG. 8, immediately after the sliding projection 34 is guided to the circular arc portion 56g for delivery, the second drive member 4 is provided.
The circular arc portion 57a for delivery which is formed on the circular arc locus of the same radius r4 by the second cam portion 57 still has the sliding protrusion 44 of 0.
It is located inside. FIG. 7 shows the first drive member 30 and the second drive member 4 when the rotating body 54 is in the rotation phase of FIG.
The position of 0 is shown. In FIG. 7, the first escape portion 32b of the first drive member 30 that has moved in the X1 direction and stopped.
Corresponds to the support slot 12. In addition, the first tilt guide portion 32a is the second drive member 40 that has been stopped until now.
Of the second inclined guide portion 42b, which is substantially linear. At this time, the support shaft 25 is located at (0) at the lowermost end of the first tilt guide portion 32a of the first drive member 30 and at the upper end portion of the second tilt guide portion 42b of the second drive member 40. Will be located. That is, the support shaft 25 is ready to be delivered from the first tilt guide portion 32a to the second tilt guide portion 42b. When the support shaft 25 reaches the position (0) in FIG. 7, the drive unit 20 moves to an intermediate position between the selected positions of the third stage standby section A3 and the fourth standby section A4. That is, the state of FIG. 7 is an intermediate state in which the drive unit 20 does not select any of the cartridges in the standby portions. Therefore, in the state of FIG. 8, the rotating body 54 does not stop, and in FIG.
4 shows an intermediate process of rotating from the state of FIG. 5 to the state of FIG. When the rotating body 54 rotating in the α direction passes through the phase shown in FIG. 8, the sliding protrusion 34 of the first driving member 30 only slides within the circular arc portion 56g formed in the circular arc locus having the constant radius r4. After that, the first drive member 30 remains stopped at the position shown in FIG. 7. In the first driving member 30 in this stopped state, the first escape portion 32b coincides with the support elongated hole 12. Therefore, after FIG.
When is rotated in the α direction, the first escape portion 32b continues to allow the support shaft 25, that is, the drive unit 20 to move in the Y1 direction.

When the rotating body 54 rotates in the α direction from the state shown in FIG. 8, the sliding protrusion 44 of the second driving member 40 comes out of the circular arc portion 57a of the second cam portion 57 and is driven by the driving portion 57b in the X1 direction. Be driven to. During this time, the support shaft 25 moves to the second
Of the driving member 40, the supporting shaft 25 moves along the X1 direction of the second inclined guide portion 42b, and the support shaft 25 moves the supporting elongated hole 12 (and the first escape portion 32b). ) In the Y1 direction, the drive unit 20
Also descends in the Y1 direction. In the state of FIG. 10, the sliding protrusion 4
4 reaches the circular arc portion 57c of the fourth stage of the second cam portion 57.
When the rotating body 54 stops at the position shown in FIG. 10, the arcuate portion 57 of the fourth stage formed on the arcuate locus having the radius r3 with respect to the center O.
The sliding protrusion 44 stops in c. By accurately forming the outer diameter dimension of the sliding protrusion 44 and the width dimension (groove width dimension) of the second cam portion 57, the arc portion 57 in the state of FIG.
The sliding protrusion 44 is held by c without displacement in the X1-X2 direction. Therefore, X1 of the second drive member 40
The rattling in the -X2 direction is prevented, and the support shaft 25 is shown in FIG.
Are positioned at the position indicated by (iv). In the state shown in FIG. 9, the drive unit 20 faces the fourth-stage standby portion A4, and the cartridge C in the standby portion A4 can be selected.

When the rotating body 54 further rotates in the α direction,
By the drive portion 57d of the second cam portion 57, the sliding protrusion 44 is guided to the circular arc portion 57e of the fifth stage and the state shown in FIG.
At this time, the support shaft 25 is lowered to the position (v) in FIG. 9 by the second tilt guide portion 42b. When the rotating body 54 stops at the position of FIG. 11, the sliding protrusion 44 is restrained by the arcuate portion 57e of the fifth stage, and the drive unit 20 is positioned at a position where the cartridge C in the standby portion A5 of the fifth stage can be selected. To be done. Further, the rotating body 54 rotates in the α direction, and FIG.
When the state shown in FIG.
To reach the inside of the circular arc portion 57g of the sixth step of the second inclined guide portion 4
The support shaft 25 is guided to the lowermost stage shown by (vi) in FIG. 9 by 2b. When the rotating body 54 stops in the state of FIG. 12,
The drive unit 20 is positioned at a position for selecting the cartridge C in the standby section A6 of the sixth stage. The operation of moving the drive unit 20 in the upward selection direction (Y2 direction) in the figure is the reverse of the above, and from the state of FIG.
Will be driven to rotate in the β direction.

In the above series of operations, the first driving member 30 first moves from the position shown in FIG. 2 in the X1 direction by the distance La, and stops at that time. Then the second drive member 4
0 moves from the position shown in FIG. 2 in the X1 direction by the same distance La and stops. The respective drive members 30 and 40 are moved by the distance La from the position shown in FIG. 2 as a starting point, and the drive unit 20 is moved from the selected position for the first stage standby portion A1 to the selected position for the sixth stage standby portion A6. You can select and move up to. In addition, the drive unit 20
However, the cam portions 56 and 57 have a function of positioning the drive unit 20 when the cartridge (recording medium) of any one of the standby portions A1 to A6 is moved to the selected position.
I have it. That is, when the sliding protrusion 34 is restrained by any one of the circular arc portions 56a, 56c, 56e of the first cam portion 56, the drive unit 20 is positioned at the standby position for any one of the standby portions A1 to A3. It In addition, the sliding protrusion 44 is formed on one of the circular arc portions 5 of the second cam portion 57.
When restrained by 7c, 57e, and 57g, the drive unit 20 is positioned at the standby position for any of the standby portions A4 to A6.

Therefore, the inclination guide portions 32a and 42b are
It is not necessary to provide the parallel portions 6a, 6c, 6e as in the conventional example of FIG. 13, and the moving distance L of each drive member 30 and 40 is not required.
In a, the movement distances L1, L2 in the parallel portion shown in FIG.
L3 is not included. Therefore, the movement distance La of the first and second drive members 30 and 40, which guide the drive unit to the three-stage standby portion, respectively, is the same as that of the conventional drive lever 5 of FIG. It is significantly shorter than the distance L0. Therefore, the moving distance of the drive members 30 and 40 in the chassis 10 can be shortened, and the mechanism arrangement in the chassis 10 can be made efficient. Further, as shown in FIG. 3, in the first cam portion 56 and the second cam portion 57,
The connecting portion between each arc portion and the driving portion is not extremely bent unlike the connecting portion between the inclined guide portion 6b and the parallel portion 6c shown in FIG. Therefore, for example, the first cam portion 56 causes the sliding protrusion 34 to move from the drive portion 56b to the arc portion 56.
When being led to c, the fluctuation of the load of the rotating body 54 does not become extremely large. Therefore, the drive member is driven smoothly, and wear of the meshing portions of the gears is less likely to occur due to load fluctuations.

In the above embodiment, the first driving member is used.
The driving member 30 and the second driving member 40 are provided, and the inclined guide portions 32a and 42b formed on the driving member 30 and the second driving member 40 share the movement of the driving unit to the selected position in three steps. Alternatively, only one driving member may be provided and the driving unit may be moved in the selection direction by the tilt guide portion provided on the driving member. In this case, as compared with the conventional example shown in FIG. 13, the moving distance of the driving member with respect to the selective movement of one step of the recording medium becomes shorter. Therefore, for example, by moving the driving member by the same distance as the moving distance L0 in FIG. It is also possible to move the drive unit to a selected position for four or five recording media. Further, as the power conversion portion, an inclined guide portion may be provided on the drive unit 20 side and a guided portion guided by the inclined guide portion such as a shaft or a protrusion may be provided on the drive member side.

Although the inclined guide portions are all elongated holes in the above embodiment, the inclined guide portions may be grooves. Further, each of the cam portions 56 and 57 need not be a cam groove, but may be a rail cam or a cam that guides the follower on the outer circumference. However, it is necessary to allow the drive member to be restrained at the arc portion of the cam portion. Further, the recording medium selected may be a disc not housed in the cartridge. The disc is an optical disc, a magneto-optical disc, a magnetic disc, or the like, and a recording medium other than the disc may be selected.

[0045]

As described above, according to the present invention, the movement distance of the drive member for selectively moving the drive unit can be made shorter than before, and the drive unit can be reliably positioned at each selected position. Since the moving range of the drive member can be shortened, the arrangement efficiency of the mechanism in the housing or chassis can be improved, and the degree of freedom in design can be improved. Further, it is possible to select more recording media than the conventional one by using the driving member having a short moving distance.

Further, since the movement of the drive unit and the positioning of the drive unit at the selected position are controlled by the shape of the rotating cam portion, the movement of the drive member becomes smoother than that of the conventional one, and the drive is performed. The fluctuation of the load on the member is reduced, and the wear of the mechanism is reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an internal mechanism of a vehicle-mounted disk device according to a first embodiment of the present invention,

FIG. 2 is a side view of an internal mechanism of the disk device shown in FIG.

3A is a plan view of a rotating body showing a second cam portion in a first stage selected state, FIG. 3B is a plan view of a rotating body showing a second cam portion in a first stage selected state, FIG.

FIG. 4 is a plan view showing the rotating body in the second stage selected state;

FIG. 5 is a plan view showing the rotating body in the third stage selected state,

FIG. 6 is a side view of the chassis showing the second stage selected state,

FIG. 7 is a side view of the chassis showing a delivery state between the inclined guide portions,

8 is a plan view of a rotating body corresponding to FIG. 7,

FIG. 9 is a side view of the chassis showing a selected state of the fourth stage;

FIG. 10 is a plan view of the rotating body showing the fourth-stage selection state,

FIG. 11 is a plan view showing the rotating body in the fifth-stage selection state,

FIG. 12 is a plan view showing the rotating body in the sixth-stage selection state,

FIG. 13 is a side view showing a conventional vehicle-mounted disc device;

[Explanation of symbols]

A1 to A6 standby unit C cartridge D disk Y1-Y2 selection direction X1-X2 Drive member movement direction 10 chassis 11 storage boxes 12 Support slot 20 Drive unit 25 Support shaft 30 First drive member 31 Guide shaft 32 guide hole 32a 1st inclination guide part 32b First escape portion 34 Sliding protrusion 40 Second drive member 42 Guide hole 42a Second escape portion 42b Second inclined guide portion 44 Sliding protrusion 50 drive mechanism 51 motor 54 rotating body 56 First cam part 57 Second cam part

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Claims (2)

(57) [Claims] 1. A plurality of stages, each having a recording medium installed therein.
Of the standby unit, a drive unit for driving a recording medium that will be introduced from one of the standby unit, transfer of the drive unit
A drive member that reciprocates in a direction intersecting the moving direction, a rotary cam that drives the drive member, and a drive source that rotates the rotary cam are provided, and the drive member reciprocates the drive member. Moving power
Drive unit to convert it to the moving force of the drive unit.
To multiple selected positions facing each of the number of standby units
An inclining guide portion is provided, and the inclining guide portion is
Reciprocating direction of the drive member and movement of the drive unit
Tilts in both directions and the drive unit is
In the moving range that passes the selected position, the inclined guide is
The inclination angle of de portion is constant angle unchanged, the the rotary cam includes a circular arc portion of the plurality of stages which are formed along the circular path of different radii with respect to the center of rotation, different
A drive unit that connects between the circular arcs of the radius is provided.
When the drive unit is in any of the selected positions
The drive member is restrained by the arc portion, and the cam portion is
When rotating, by the drive unit, the drive member,
A drive device for a recording medium, which is movable between adjacent selected positions . 2. The rotary shaft of the rotary cam is the drive member.
Are arranged orthogonal to the reciprocating direction of the
The cam groove having the arc portion and the drive portion
And the sliding protrusion provided on the driving member is
The recording medium driving device according to claim 1, wherein the driving device is directly guided and driven by the groove .