JPS62212978A - Carriage shifting device - Google Patents

Abstract

PURPOSE:To facilitate to assemble a disk driving device by unifying a carriage shifting device to a supporting plate and constituting one unit. CONSTITUTION:A screw shaft 34 and a stepping motor 11 are fitted through bearings 68 and 69 to a supporting plate 64 beforehand and made into a unit. Consequently, the bearings 68 and 69, the screw shaft 34, the stepping motor 11, etc., can be handled as one part, assembling can be simply executed, therefore, assembling cost can be lowered, executed. By installing the flat stepping motor 11 in the direction orthogonal to the screw shaft 34, the thickness of the shifting mechanism can be reduced.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a carriage transport system that transports a head device for writing and/or reading signals on an information recording medium formed in a disc shape in the radial direction of the disc. Regarding equipment.

[Conventional technology]

In a disk drive device that records and/or reproduces information on an information recording medium, it is necessary to move, for example, a magnetic head in the radial direction of the recording medium for writing and/or reading signals. A transfer device for transferring this magnetic head requires a motor as a driving source and a transmission mechanism for transmitting the driving force of the motor to a carriage that supports the magnetic head. In Figure 40,
An example of such a conventional screw shaft type carriage transfer device is shown below. In the figure, 150 is a housing, 151 is a stepping motor, and a casing 152 of the stepping motor 151 is attached to the housing 150 with screws 153. Casing 1
5.2, a coil 155 wound around a coil bobbin 154 and a comb-shaped yoke 156 integrated with the casing 152 are provided as a stator of the motor, and a cylindrical permanent magnet 157 controls the rotation of the motor. It is installed as a child.

Reference numeral 158 denotes a screw shaft with a spiral groove 158a carved on its outer circumferential surface. This screw shaft 158 passes through and is fixed to the permanent magnet 157, and its small-diameter conical ends at both ends support bearings 159 and 160 each having a built-in ball bearing.
It is rotatably supported. The bearing 159 is held in the housing 150 via a holder 162 so that it cannot be removed, and is always pressed toward the screw shaft 158 by a spring 163 built into the holder 162. 160
They are constantly being oppressed by their side. Further, the bearing 160 is attached to an adjustment screw 165 screwed into a support 164 attached to the stepping motor 151, and by turning the adjustment screw 165, the screw shaft
58 can be adjusted by a minute amount in the thrust direction.

168 is a magnetic head for writing and reading (not shown)
is transported along a guide rod 169 by a carriage carrying a. Reference numeral 170 denotes an engaging element attached to the carriage 168, and its conical tip 170a is elastically engaged with the helical groove 158a of the screw shaft 158. Therefore, when the screw shaft 158 is rotated forward and backward by the stepping motor 151, the spiral groove 1
As the pointed end 170a of the engager 170 fitted into the engagement element 58a moves, the carriage 168 moves along the guide shaft 169 in approximately the same direction as the axial direction of the screw shaft 158.
Also, the amount of rotation is transferred back and forth by an amount corresponding to the amount of rotation.

By the way, in the above-mentioned transfer mechanism, the housing 15
A stepping motor 151 is attached using a horizontal hole 150a, a horizontal hole 150b, and a screw hole 150C formed in
Two wooden guide rods 169 are provided substantially parallel to the screw shaft 158. Both ends of this guide rod 169 are attached to grooves formed in the housing 150. This groove (not shown) allows the height of the carriage 168 to be -
・Precisely formed as a reference surface for determining the Therefore, the carriage 168 is always transported along the plane formed by the two guide rods 169 regardless of the engagement position of the pointed end 170a of the engaging element 170 with the spiral groove 158a of the screw shaft 158. is now possible.

In this way, when the transport plane of the carriage 168 is defined by the two guide rods 169, the installation accuracy of the screw shaft 158, that is, the installation accuracy of the stepping motor 151 is determined by the accuracy of the installation of the guide rod 169. Accuracy was not required, and sufficient transfer accuracy was obtained for practical use even in relatively rough conditions. Therefore, normally, the screw shaft 158 is loosely inserted into the horizontal hole 150a bored in the housing 150, and the screw shaft 158 is
The bearing 159 is fitted into a holder 162 that is press-fitted into a horizontal hole 150b formed in the side wall of the housing 150, and the side wall of the casing 152 is attached to the side wall of the housing 150 through the screw 153 in the screw hole 150C. ,
Before tightening the screw 153, the position of the screw shaft 158 was adjusted by moving the main body of the stepping motor 151, and then tightened and fixed.

[Problem that the invention seeks to solve]

By the way, in order to downsize and simplify the transfer mechanism configured as described above, one of the two guide rods 169 is omitted, and only one guide rod and two screw shafts 158 are used.
It is considered that a configuration in which the transport device is formed of books is extremely rational. In this case, it is necessary for the screw shaft 158 to have a guide function and a feed function, and if the screw shaft 158 is provided with a guide function, the mounting accuracy of the screw shaft 158 in particular becomes a problem.

However, since the adjustment of the screw shaft 158 is performed by loosely inserting the screw shaft 158 into the horizontal hole 150a formed in the housing 150 and using the screw 153 as described above, an error may occur in tightening the screw 153 depending on the direction of tightening. There is a problem in that the accuracy is difficult to achieve and adjustment takes more time than when two guide rods 169 are used, leading to an increase in assembly cost. Furthermore, since the horizontal hole 150b must be machined in consideration of the fit between the holding body 162 and the horizontal hole 150b, there is also the problem that the machining cost increases.

Therefore, an object of the present invention is to provide a low-cost carriage transfer device that is easy to work with, easy to assemble, and does not require adjustment in the height direction.

[Means for solving problems]

In order to achieve the above object, the present invention provides a carriage transport device for transporting a carriage equipped with a head device for writing and/or reading signals on an information recording medium in the radial direction of the medium. A screw shaft with a feed groove carved therein and a driven gear rotatable integrally with the screw shaft, a bearing that rotatably supports this screw shaft, and a main drive gear that rotates integrally with the rotating shaft. and a support plate, both ends of the screw shaft are held between the bearings and the screw shaft is supported by the support plate, and a driving gear is meshed with the driven gear to drive the stepping motor. The structure is attached to the support plate.

[For production]

According to the above means, a carriage transfer device whose main components are a screw shaft and a stepping motor,
It can be integrated through the support plate, making assembly easy, and since the center of the screw shaft coincides with the center of rotation of the bearing, the height position of the bearing can be adjusted in relation to the height of the support part of the guide rod. Once defined, the desired height accuracy can be obtained simply by attaching the support plate to the frame or housing of the disk drive device, without having to make any particular adjustments during assembly. Moreover, hole machining that requires precision, such as the horizontal hole 150b in the conventional example, is not required.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 39 are for explaining a disk drive device equipped with a carriage transfer device according to an embodiment of the present invention, and FIG. 1 is an exploded perspective view of a carriage transfer unit according to this embodiment, and FIG. 2 is a plan view of a disk drive device equipped with this carriage transfer unit, FIG. 3 is a front view thereof, FIG. 4 is a bottom view thereof, and FIG. 5 is a plan view of a frame.
Fig. 6 is a side view thereof, Fig. 7 is a sectional view taken along the line A-A in Fig. 5, Fig. 8 is a plan view of the slide plate, Fig. 9 is a front view thereof, Fig. 10 is a side view thereof, and Fig. 10 is a side view thereof. Fig. 11 is a plan view of the cartridge holder, Fig. 12 is a front view thereof, Fig. 13 is a left side view, Fig. 14 is a right side view, Fig. 15 is a plan view of the carriage, and Fig. 16 is a side view thereof. FIG. 17 is a sectional view of the main parts of the carriage and the carriage transfer mechanism, FIG. 18 is a plan view showing the main parts of the carriage transfer mechanism and the frame, FIG. 19 is a front view thereof, and FIG. 20 is a plan view of the lock cam. Figure 21 is its side view, Figure 22 is its rear view, and Figure 23 is its rear view.
24 is a sectional view of the main part showing the spring and the vicinity of the spring attachment part, FIG. 25 is a plan view of the shutter closing spring, FIG. 26 is a plan view of the cam plate, and FIG. 27 is its main part sectional view. A front view, FIG. 28 is an enlarged view of the main part showing the pad part of the cam plate, FIGS. 29 and 30 are plan views showing the operation of the cam plate, and FIGS. 31 to 34 are side views showing the operation, respectively. Figure 35 is a plan view of the disk cartridge, Figure 36 is a bottom view thereof, Figure 37 is a partially omitted front view of the main part of the screw shaft to explain the intermittent drive screw, and Figure 38 is its right side. 39 are explanatory diagrams showing the advance angle of the intermittent drive screw of the screw shaft.

Overall Configuration> First, the schematic configuration of a disk drive device equipped with a carriage transfer unit will be described with reference to FIGS. 2 to 4.

The disk drive device shown as an example includes a frame 1 and a slide plate 2 that is slidable in the vertical direction in FIG. 2 on the upper surface of the frame 1.
The disc cartridge 50 is held by protrusions 6a and 6b on the side surfaces that engage with cam grooves 5a and 5b formed in the side plates 24 and 25 of the frame body 1 and the side plates 37 and 38 of the adjacent slide plate 2, respectively. A cartridge holder (hereinafter abbreviated as holder) 7 is attached to the upper surface of the frame 1,
A motor 9 rotates the turntable 8 and constitutes a disk drive mechanism together with the turntable 8, a carriage 10 is located on the upper surface of the frame 1 and moves the disk 51 in the radial direction, and a stepping motor 11 is used to drive the disk 51. It mainly consists of a carriage transfer mechanism 12 that transfers the carriage 10, and a lock lever 14 that has an operating pin 13 erected at the deepest part in the insertion direction of the cartridge 50 and can regulate the sliding position of the slide plate 2.

The frame 1 is made by bending a metal plate and has dimensions close to the outer dimensions of the disc cartridge 50, and has a motor mounting part 15 in the center, and a part of the frame 1 as shown in FIG. It is formed by being lifted up from the bottom plate 16. On the disk cartridge insertion side B of the frame 1, a mounting portion 17 for a carriage transfer unit 33, which will be described later, is provided, and two mounting holes 19 for pad adjustment pins 18 are bored.

In addition, mounting portions 21 for positioning pins 20 that support the disk cartridge 50 during loading are provided at three locations, one on the disk cartridge insertion side B and one on each corner of the anti-disk cartridge insertion side. 2 is provided with a mounting portion 23 for a tension spring 22 that always springs the tension spring 22 toward the disk cartridge insertion side B.

Side plates 24 and 25 are formed upright on both sides of the frame 1, and the left side plate 24 when viewed from the disk cartridge insertion side B has two guide grooves 26a for guiding the tips of protrusions 6a, which will be described later. A mounting hole 28 for a guide shaft 27 is formed on the side opposite to the disk cartridge insertion side. Large and small openings 29 visible in the center of Figure 6
．． Reference numerals 30 are for protruding or escaping an eject lever 31 and a lock lever 14, which will be described later. On the other hand, the right side plate 25 when viewed from the disk cartridge insertion side B has a guide groove 2Gb similar to that described above and a support hole 36 into which the protrusion 74 of the bearing 69 of the screw shaft 34 of the carriage transfer unit 33 is inserted and supported. is drilled.

As shown in FIG. 8, the slide plate 2 has side plates 37 and 38.
and a connecting plate 39 that supports the side plates 37 and 38, and the connecting plate 39 has a recess 40 slightly recessed toward the bottom plate 16 of the frame 1 in the center thereof, as shown in FIG. is formed. This recessed portion 40 is located on the lower surface of the motor mounting portion 15 of the bottom plate 16, and is adapted to slide within the range of the mounting portion 15. The side plates 37 and 38 include
Cam grooves 5a and 5b into which protrusions 5a and 5b protruding from the side surface of the holder 7 are inserted are respectively formed, and a pad is provided on the anti-disk cartridge insertion side of the right side plate 3 when viewed from the disk cartridge insertion side B. A cam surface 4 for raising and lowering a cam plate 42, which will be described later, and is equipped with a cam plate 41.
3 is formed. The large and small openings visible in FIG. 10 are an insertion hole 44 through which the guide shaft is inserted, and a locking hole 45 into which the tip of the lock lever 14 locks, and the eject lever 31 is attached to a mounting hole 45 formed on the same side. Hole 46
It can be attached to.

As shown in FIGS. 11 to 14, the holder 7 is provided with an insertion opening 47 for the disk cartridge 50 at the bottom in FIG.
The pad insertion slot 48 and the pulse generation sensor (P
A detection opening 49 for a G sensor) is formed.

In FIG. 11 of the holder 7, two projections 6a are provided on the left side surface 53, and an elastic piece 55 hangs integrally from the right side surface 54, and a projection is provided at the tip of the elastic piece 55. 6b is provided. These protrusions 6a, 6b
In this embodiment, since they move along the cam grooves 5a and 5b, driving rollers 56a and 56b are provided inside.
are fitted so that they can rotate freely. A stopper 57 that defines the insertion position of the disk cartridge 50 is formed at the rearmost end of the holder 7 when viewed from the disk cartridge insertion slot 47 side. The turntable 8 side of the holder 7 is opened almost entirely, and the disk cartridge 50 is supported by support pieces 53a and 54a formed on the lower side of the side surfaces 53 and 54.

As shown in FIGS. 15 and 16, the carriage 10 has a turntable insertion hole 58 into which the turntable 8 is rotatably inserted, and a guide shaft 27 is slidably inserted above in FIG. A long span bearing 59 to be inserted is mounted, and metal is fitted to both ends of the bearing 59, respectively. At the bottom of the carriage 10 in FIG.
A contact piece 60 that defines the height position of the screw shaft 34, and a plate spring 63 that supports an engager 62 that meshes with the feed groove of the intermittent drive screw 61 of the screw shaft 34 from the bottom plate 16 side are provided. The screw shaft 34 is held in between.

Also, on the right side in Fig. 15, there is a magnetic herad 110
A mounting member 106 is screwed to the mounting member 106.
A predetermined magnetic head 110 is attached to the disk 51 so that writing can be performed on the disk 51 via this magnetic head 110.

Carriage transfer unit 3 as a carriage transfer mechanism
3, as shown in FIGS. 1, 17, 18, and 19, mainly includes a support plate 64, a stepping motor 11, and a screw shaft 34. As can be seen from FIGS. 1 and 19, the support plate 64 is
In the figure of the stepping motor mounting part 65 which is bent into two stages and located above the bottom plate 16, the stepping motor 11 is mounted on the lower surface side, and the side walls 66.6 at both ends are shown.
The screw shaft 34 is supported between bearings 68 and 69 supported by the bearings 7. The screw shaft 34 and the stepping motor 11 are integrally attached to the support plate 65 to form one unit.

Intermittent drive screw 61 carved in screw shaft 34
This screw shaft 34 is similar to that disclosed in Japanese Utility Model Application No. 60-67564 filed by the present applicant, and as shown in FIG. In this state, the groove portion 34a, which is parallel to the perpendicular Y perpendicular to the axis lx, that is, has an advance angle of zero (-〇2), and whose bottom portion is straight, is sequentially shifted in the axial direction of the shaft 34. As a result, one spiral groove 34b is formed by these groove portions 34β. A feeding portion 34C, through which the carriage 10 is transferred at a predetermined pitch, is formed at each connecting portion between adjacent grooves 34a.

In the carriage transfer unit 33 configured by fitting the engager 62 of the carriage 10 into the spiral groove (intermittent drive screw) 34b of the screw shaft 34,
As the screw shaft 34 rotates, the carriage 10 moves in a predetermined direction in accordance with the advance angle θ when the retainer 62 slides within the feeding portion 34C of the spiral groove 34b.
When the retainer 62 reaches a desired groove 34a of the spiral groove 34b, the stepping motor 11 is de-energized and the carriage 10 stops moving. In this way, the feeder 34c moves the target groove 3.
By stopping the movement at 4a, the carriage 10 is moved intermittently. In the groove portion 34a, the advance angle θ2
is zero, so even if the rotation angle of the screw shaft 34 is slightly deviated, the stop position of the carriage 10 is set appropriately, and the stop position accuracy is increased.

In addition, since the intermittent drive screw as described above is adopted for the screw shaft 34, the bumpiness that occurs between the crown gear 76 and the spur gear 71 which are interposed between the rotating shaft of the stepping motor 11 and the screw shaft 34 is reduced. , there is no risk of adversely affecting the accuracy of the stop position of the carriage 10.

Further, a stopper 70 is provided on this screw shaft 34.
A spur gear 71 is fitted into the stopper 70, and the stopper 70 has its protrusion 70a engaged with the protrusion 60a of the abutting piece 60, thereby regulating the rotation of the screw shaft 34 and preventing the carriage 10 from moving. It is supposed to be done. This blocking position corresponds to the O-trace 99 position of the magnetic head 110.

Bearings 6B, 6 that support both ends of the screw shaft 34
9 rotatably supports the end of the screw shaft 34 formed in a conical shape by a pivot bearing, and on the bearing 68 side, the holder 162 in the conventional example is supported.
Similarly, the screw shaft 34 is biased rightward in FIG. 19 by a compression spring 72, and its axial position can be adjusted by an adjustment screw 73 on the bearing 69 side. Further, on the bearing 69 side, the bearing 69 is supported by the side wall 67 as described above, and the end of the bearing 69 in which the adjustment screw 73 is embedded is made to protrude from the side wall 67, and the protrusion 74 is inserted into the frame. The height position of the carriage transfer unit 33 itself is defined by fitting into the support hole 36 of the side plate 25 of the body 1.

The spur gear 71 fitted to the screw shaft 34 meshes with the crown gear 76 fitted to the rotating shaft 75 of the stepping motor 11 attached to the support plate 64, and the step operation of the stepping motor 11 is controlled by the crown gear 76.
6. Transmitted to the screw shaft 34 via the spur gear 75. Thereby, the rotational operation of the stepping motor 11 is transmitted to the carriage 1o via the intermittent drive screw 61, and the carriage 10 is moved straight at each step.

As shown in FIGS. 20 to 22, the lock lever 14 is formed into a substantially key shape, and the operating pin 13 is erected at the tip of an operating portion 77 extending leftward in FIG. A locking protrusion 79 is formed at the tip of the locking portion 78 that extends.

A mounting hole 80 into which a positioning pin 20 (to be described later) is rotatably inserted is formed at a portion where the operating portion 77 and the locking portion 78 are substantially perpendicular to each other. The operating pin 13 is used to rotate the lock lever 14 in the counterclockwise direction in the drawing with respect to the mounting hole 80 when the tip of the disk cartridge 50 comes into contact with it.
9 can be removed from the edge of the locking hole 45 of the slide plate 2. When the lock lever 14 is installed, it is always urged clockwise in FIG. 2 by the spring 81.

A pair of pad adjustment pins 18 are provided, the tips of which protrude from the pad insertion opening 48 of the holder 7, and are attached to the cam plate 4, which will be described later.
The magnetic head 110 of the pad 41 provided at the tip of 2
It is set to define the height position relative to the height position. As shown in FIG. 23, this pad adjustment pin 18 has a support pin part 83 with a through hole 82 formed in the center, a female thread 84 cut in the lower part of the center, and an adjustment part 85 formed in the upper part. It mainly consists of a pin part 86 and an adjustment screw 87 that is inserted from the lower end of the through hole 82 of the support bottle part 83 and engages with the female thread 84 of the adjustment bottle part 86 . A spring washer 88 is provided between the adjustment bin part 86 and the support bin part 83.
is inserted, and by rotating the adjustment screw 87, fine adjustment is possible within the range where the elastic force of the spring washer 88 acts.

Therefore, a collar 89 is formed on the adjustment pin portion 86, and a step 83a is formed in the through hole 82 of the support bottle portion 83, with which the head of the adjustment screw 87 comes into contact.

This pad adjustment pin 18 is connected to the bottom plate 1 as shown in FIG.
It is inserted into the mounting hole 19 from the upper surface of the support bin part 83, and is attached by caulking the lower end of the support bin part 83 outward. Second
The reference numeral 90 in FIGS. 3 and 2 is an E washer for pressing the slide plate 2.

As shown in FIGS. 24 and 4, the tension spring 22 that always biases the slide plate 2 toward the disk cartridge insertion side B is connected to the mounting portion 23 of the bottom plate 16 of the frame body 1 and the slide plate 2.
The tension spring 2 is stretched between the locking holes 91 of the bottom plate 39 of the
The tensioning position is determined so that the side surface of 2 does not protrude below the bottom plate 16.

In the closing spring 92 of the shutter 506 shown in FIG. 25, a short straight portion 92a is inserted into a mounting hole 93 formed at the end of the holder 7 on the side opposite to the disk cartridge insertion side, and a bent portion 94 of a long portion 92b is disk cartridge 50
When the shutter 50e is ejected, it comes into contact with one end 50g of the shutter 50e to close the shutter 50e. This is operated by the bending portion 94 regulating the relative position of the shutter 5Qe with respect to the holder 7.

As shown in FIGS. 26 and 27, the cam plate 42 has a pad 41 shaped as shown in FIG. 28 on the distal end side.
The short straight portion 92a of the closing spring 92 is rotatably fitted into the attachment hole 95 on the base end side, and the holder 7
It is adapted to be coaxially and swingably mounted in the mounting hole 93 of.

At the upper part of the cam plate 42 in FIG. 26, a roller 96 that rolls on a cam surface 43 formed on the side plate 38 of the slide plate 2 is provided to protrude from the lower end of the hanging side plate 97. The cam plate 42 is such that the pad 41 is positioned above the holder 7 as shown in FIG. 32 when the holder 7 is unloaded, and is positioned inside the holder 7 as shown in FIG. 31 when the holder 7 is loaded. The disk 51 surface can be pressed by pressing the disk 51 side.

The disk cartridge 50 used for recording and reproduction is
As shown in FIGS. 5 and 36, it mainly consists of a disk 51 as a magnetic recording medium in which a magnetic sheet is formed into a disk shape, and a case 50a made of a hard synthetic resin material that houses this disk 51. There is. A shaft insertion hole 51a is provided in the center of the disk 51 for fitting the fixed shaft (or spindle shaft) 107 in the center of the spin table 8.
and a hub 51C to which an annular magnetic body 51b is integrally attached are provided, and are exposed from a fixed shaft insertion opening 50b in the center of the case 50a.

The shaft insertion hole 51a of the hub 51C also includes the fixed shaft 1.
Two slopes 51d so that the axis coincides with 07
A pressing portion 51e having an elastic structure is formed so as to press the rotating portion around the fixed shaft. The magnetic body 51b provided on the hub 51c is disposed at a position opposite to an annular magnet 108 that is integrally provided on the turntable 8 that rotates at high speed around a fixed shaft, and the magnetic body 51b is disposed in a position facing each other. It is designed to be absorbed. As a result, when the turntable 8 rotates, the magnet 108 attracts the magnetic body 51b and rotates integrally with the magnetic body 51b due to the magnetic attraction effect of the magnet 108, thereby performing recording or the like.

In addition to the fixed shaft insertion opening 50b, the case 50a has a magnetic head insertion opening 50C1 into which the magnetic head 110 is inserted.
Positioning pin insertion hole 50 into which the positioning pin 20 is inserted
d is formed, and the magnetic head insertion opening 50
A sliding shutter 50e for opening and closing C is attached. Further, a write protect notch 50f is formed on the surface of the case 50a on the turntable 8 side, and is set so that re-recording can be prevented by breaking off the protrusion of the notch 50f.

In FIG. 36, the approximately semicircular notch 50h visible above and below the left side of the magnetic head insertion port 50C is for protruding the pad adjustment pin 18, and comes into contact with a part of the adjustment member 86 from this notch 50h. The portion 85 protrudes, and the height position of the disk 51 relative to the magnetic head 110 can be defined without the pad 41 coming into contact with the case 50a.

Subsequently, the details of the overall structure will be explained mainly with reference to FIGS. 2 to 4.

A slide plate 2 is slidably attached to the upper surface of the bottom plate 16 of the frame body 1, and a concave portion 40 of the connecting plate 39 of the slide plate 2, which is one step lower, is connected to the motor mounting portion 15 in FIGS. 5 and 7. It is located on the bottom side. A spindle motor 9 that rotates at high speed is screwed to this motor mounting portion 15, and the motor 9 is held at a predetermined height, and the slide plate 2 is able to reciprocate on its lower surface.

After the slide plate 2 is inserted into the lower part of the motor mounting part 15 in this way, it is fixed on the bottom surface 16 by a part of the positioning pin 20 and the E washer 90.98 fitted to one of the pad adjustment pins 18. The location is specified.

The carriage transfer unit 33 is screwed and attached to the unit attachment hole 99 shown in FIG. 5 of the bottom plate 16,
At this time, the protrusion 74 of the bearing 69 touches the side plate 2 of the frame 1.
5 and is fixed to the frame 1 at three locations: the mounting hole 36 and the two unit mounting holes 99.

The carriage 10 is supported between the guide shaft 27 fixed between the side plates 24 and 25 and the screw shaft 34 of the carriage transfer unit 33, and is capable of reciprocating in the left-right direction in FIG. 2 due to the above-described structure.

The lock lever 14 is located at the positioning pin 2 at the top left in Figure 2.
0 so as to be rotatable, and an E washer 100 prevents it from coming off. FIG. 2 shows a state in which the disc cartridge 50 has been inserted and the holder 7 is in the loading position. At this time, the locking portion 78 is rotated counterclockwise as the operating pin 13 is displaced upward in the figure. The locking state of the sliding plate 2 with the edge of the locking hole 45 is released, and the sliding plate 2 is moved to the disk cartridge insertion side B.
It is displaced to . Therefore, the side plate 37 of the slide plate 2
As shown in FIG. 2, the eject lever 31 attached to the frame body 1 is also located at a position closest to the disk cartridge insertion side B of the opening 29 of the frame body 1.

In addition, on the disk cartridge insertion side B of the bottom plate 16,
A sensor 1 detects the presence or absence of the write protection notch on the disk cartridge 50 and detects whether writing is possible.
01, a connector 102 connected to a signal path for controlling the spindle motor 9, a connector 103 for inputting a write signal, etc. are provided on the side plate 2.
4 side and the side opposite to the disk cartridge insertion side.

As shown in FIG. 3, the positioning pin 20
4 and an insertion portion 105, the positioning pin insertion opening 5 is formed in the case 50a of the disk cartridge 50.
The insertion portion 105 is inserted into the mounting portion 104, and the lower surface of the case 50a comes into contact with the mounting portion 104, so that the case 50a can be positioned.

The holder 7 connects both protrusions 6a on the side surface 53 to the slide plate 2.
Side plate 3 on the left side when viewed from the disk cartridge insertion side B
7 into the guide groove 26a of the side plate 24 on the same side of the frame 1, and insert the protrusion 6b protruding from the elastic piece 55 on the side surface 54 into the side plate 38 on the opposite side of the slide plate 2. It is inserted into the guide groove 26b of the side plate 25 on the same side of the frame 1 through the cam groove 5b of the frame 1 while being pressed inward, so that it is press-fitted. Thereby, the holder 7 is attached to both side plates 24 of the frame body 1.
25, it is supported so that it can only move up and down.

In this state, the roller 96 of the cam play 1-42 is positioned on the cam surface 43 of the side plate 38 of the slide 12, and the cam play 1-42 becomes transferable.

Loading Operation> Next, the loading operation of the disk drive device configured as described above will be described.

Before inserting the disk cartridge 50 into the holder 7,
For example, as shown in FIGS. 32 and 33, the holder 7 is at the farthest position from the turntable 8, and at this time, the protrusion 6a of the holder 7.

6b are located at the top of the guide grooves 26a and 26b, respectively, and are located at the horizontal portion of the upper end of the cam groove.

In this state, the locking protrusion 79 of the lock lever 14 locks on the edge of the locking hole 45 of the slide plate 2 to hold the slide plate 2 at the rearmost position with respect to the disk cartridge insertion side B.

The disk cartridge 5 is inserted into the holder 7 from the above standby state.
0, the tip of the case 50a comes into contact with the operating pin 13 of the lock lever 14, as shown in FIG.

When the lock lever 14 is inserted further, the lock lever 14 moves to the third position.
As shown in Figure 0, the locking protrusion 7 is rotated counterclockwise as shown in the figure.
9 is released from the locking state of the sliding plate 2 with the edge of the locking hole 45. When the locked state is released, the slide plate 2
The disk cartridge slides toward the same side B due to the elastic force of the tension spring 22 which is always biased toward the insertion side B. Then, as shown in FIGS. 31 and 34, the protrusion 6
a, 6b roller 56a.

56b is displaced along the cam grooves 5a, 5b, and the projection 5
a, 5b are inserted into the guide grooves 26a, 26b of the frame body 1, so the displacement by the cam grooves 5a, 5b is converted into vertical movement in the direction of the turntable 8. The lowering position of the disk cartridge 50 is defined by the height of the 82 portion 104 of the positioning pin 20, and the case 50a cannot be lowered any further. During this lowering process, the shaft insertion hole 51a of the hub 51c of the disk cartridge 50 fits into the fixed shaft (spindle shaft) 107, and when it reaches the lowest position, the rotating part inserted into the fixed shaft 107 It is securely press-fitted.

Along with this loading operation, the roller 96 moves along the cam surface of the cam plate 42, the pad 41 is positioned inside the holder 7, and the pad 41 finally comes into contact with the surface of the disk 51. 109, the necessary load pressure can be obtained.

Eject operation> When loading is completed as described above and recording or playback is completed, the eject lever 31 that protrudes from the opening 29 of the side plate 24 of the frame 1 and is located on the disc cartridge insertion side B is moved to the opposite disc cartridge insertion side. , that is, slide in the direction of arrow H. Due to this sliding movement, the slide plate 2 returns to the same H direction, and the locking hole 45 bored in the slide plate 2 engages with the locking protrusion 7 of the lock lever 14.
When the lock lever 14 reaches the position corresponding to the spring 8,
The locking protrusion 79 rotates clockwise in the drawing due to the elastic force of the locking protrusion 79.
is locked to the edge of the locking hole 45. During this process, holder 7
rises along the cam grooves 5a and 5b, and the hub 51C of the disk 51 separates from the turntable 8. When the lock lever 14 rotates as described above, the operation bin 13 ejects the tip of the case 50a toward the disk cartridge insertion side B by the elastic force of the spring 81. During this process, the cam plate 42 also
31 and 32 rises along the cam surface 43.
The pad 41 is rotated counterclockwise in the figure, and the pad 41 is separated from the surface of the disk 51 and returned to the top surface of the holder 7, so that the ejecting operation can be performed without any trouble.

As described above, the above embodiment has the following effects.

■ By attaching the screw shaft 34 and the stepping motor 11 to the support plate 64 in advance via the bearings 68, 69 to form a unit, the bearings 68, 69, the screw shaft 34, the stepping motor 11, etc. can be handled as one component. Since the assembly can be simplified, the assembly cost can be reduced. In addition, as in the conventional example, various holes are machined, such as a horizontal hole 150b for press-fitting the holder 162 including the bearing 159 into the housing 150, a horizontal hole 150C1 for mounting the stepping motor 151, and a horizontal hole 150a for loosely fitting the screw shaft 158. Since there is no need to carry out this process, processing costs can be reduced.

(2) By installing the flattened stepping motor 11 in a direction perpendicular to the screw shaft 34, the transfer mechanism can be made thinner. This allows the disk drive device itself to be made thinner.

(2) Positioning the carriage 10 in the height direction by defining the height of the insertion port 28 of the guide shaft 27 and the height of the mounting hole 36 into which the protrusion 74 of the bearing 69 that supports the screw shaft 34 is inserted; It can be done with high precision.

The insertion port 28 and the attachment hole 36 can be formed at low cost by simply forming through holes in the plate material.

〔Effect of the invention〕

As is clear from the above explanation, according to this invention,
Since the carriage transfer device can be integrated with the support to form a single unit, the assembly of the disk drive device is simplified and the assembly cost of the disk drive device can be reduced. Further, since precise hole machining and the like are not required for the housing of the disk drive device, machining costs can be reduced, and product costs can be reduced.

[Brief explanation of drawings]

1 to 39 are for explaining the present invention in detail. FIG. 1 is an exploded perspective view of the carriage transfer unit, FIG. 2 is a plan view of the disk drive device, and FIG. 3 is a front view thereof. , Fig. 4 is a bottom view thereof, Fig. 5 is a plan view of the frame, Fig. 6 is a side view thereof, Fig. 7 is a sectional view taken along line A-A in Fig. 5, and Fig. 8 is a plan view of the slide plate. , Fig. 9 is its front view, Fig. 10 is its side view, Fig. 11 is its top view, Fig. 12 is its front view, Fig. 13 is its left side view, and Fig. 14 is its right side. 15 is a plan view of the carriage, FIG. 16 is a side view thereof, FIG. 17 is a cross-sectional view of the main parts of the carriage and carriage transfer mechanism, and FIG. 18 is a main part of the carriage transfer mechanism and frame body. Plan, No. 19
The figure is its front view, Fig. 20 is a plan view of the lock cam, and Fig. 20 is a plan view of the lock cam.
Figure 1 is a side view, Figure 22 is a rear view, Figure 23 is a sectional view of the pad adjustment bin, Figure 24 is a sectional view of the main part showing the spring and the vicinity of the spring attachment part, and Figure 25 is the shutter closing spring. , FIG. 26 is a plan view of the cam plate, FIG. 27 is a front view thereof, FIG. 28 is an enlarged view of the main part showing the pad part of the cam plate, and FIGS. 29 and 30 show the operation of the cam plate. FIG. 31, FIG. 32, FIG. 33 and FIG. 34 are side views showing the operation of the cam plate, respectively. FIG. 35 is a plan view of the disk cartridge, and FIG. 36 is a bottom view thereof. Fig. 37 is a front view of the main part of the screw shaft showing the intermittent drive screw portion with some parts omitted, Fig. 38 is its right side view, Fig. 39 is an explanatory view showing the lead angle of the intermittent drive screw, and Fig. 40 is FIG. 2 is a sectional view of a main part of a conventional carriage transfer device. DESCRIPTION OF SYMBOLS 10... Carriage, 11... Stepping motor, 34... Screw shaft, 51... Disk, 61... Intermittent drive screw (feed groove), 64... Support plate, 68.69...・Bearing, 71... Spur gear (driven gear), 76... Crown gear (main gear), 110...
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Claims (1)

[Claims] In a device that transports a carriage equipped with a head device that writes or reads signals to or from an information recording medium in the radial direction of the information recording medium, a stepping motor equipped with a driving gear is mounted on a support plate. A carriage transfer device, characterized in that a screw shaft is attached to the support plate via a bearing and is provided with a feed groove for carriage feed, and a driven gear that meshes with the main drive gear.