JPH0630937U - Disk device - Google Patents

Abstract

(57) [Summary] [Object] To provide a disk device capable of reliably operating a latch mechanism with a simple configuration and having a stable loading mechanism. A cassette guide 15 for accommodating a disc-shaped recording medium, a base 10 for holding the cassette guide 15 movably in the insertion direction of the recording medium and a direction perpendicular to the insertion direction, and a base 10 provided on the base 10. Stopper 28, the latch lever 22 rotatably supported on the cassette guide 15, and the latch lever 2
2 is provided with a pin 29 and a spring 27 for urging the latch lever 22 in a predetermined direction so that the pin 29 always contacts the stopper 28.
A movement restricting member 29a is provided on the top of 9 to prevent the pin 29 and the stopper 28 from being disengaged from each other in the vertical direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc device that records or reproduces information on a disc, and more particularly, to a structure of a load / unload mechanism of a recording medium in the disc device.

[0002]

[Prior art]

 The disk device is a device that records or reproduces information on or from a disk-shaped recording medium such as a magnetic disk or a laser disk. A disk as the recording medium is mounted so that it can be inserted and ejected, and a motor is driven. Thus, the disk is rotated, and recording or reproduction is performed while moving the head in contact with or close to the disk. In this case, the head is mounted on a carriage and moved (seek) along the radial direction of the disk by a motor.

In the above-mentioned disc device, an insertion / ejection means for mounting and ejecting a disc cassette, a disc rotation driving means for rotating a disc by a motor, and a head for a disc along a radial direction on a base supporting each component. Head seek means for moving to a desired track position, head load means for loading and unloading the head with respect to the disk, and the like are provided. Further, a control circuit for controlling the entire disk device, a power supply connector, etc. are provided, and the control circuit is connected to a host device or the like via an interface.

Such a disk device is used as an external storage device of an electronic device such as a personal computer or a word processor and may be configured as an independent device. However, in general, it is often incorporated in the main body of the electronic device. .

A latch mechanism required to move the cassette guide in the vertical direction in such a disk device is fixed to a pin of a latch lever provided on the cassette guide which moves up and down and a base fixedly. It is configured to operate by engaging and disengaging a provided stopper.

Further, as electronic devices have become smaller and more portable, there has been a strong demand for smaller, lighter and thinner disk devices. On the other hand, the amount of lowering of the cassette guide is required to be a certain amount, so if you use a noble whose contact position always touches the pin and the contact position extends over the entire length of the pin, load the pin and the stopper. The engagement position in the unload position must be set to the maximum extent that the contact relationship is not lost.

[0007]

[Problems to be solved by the device]

 However, in the above structure, the pin and the stopper are set to the maximum extent that the abutting relationship is not lost. Therefore, depending on the processing accuracy and the assembly accuracy of each part, as shown in FIG. 13 (b). In addition, when the cassette guide 115 is loaded, the pin 129 gets under the stopper 128, and the cassette guide 115 cannot return to the unload state as shown in FIG. 13 (a). Could happen.

The present invention has been made in view of the above technical problems, and an object of the present invention is to enable a latch mechanism to operate reliably with a simple structure and to provide a stable loading mechanism. To provide a disk device having

[0009]

[Means for Solving the Problems]

 In order to solve the above problems and achieve the above object, the present invention provides a cassette guide for accommodating a disc-shaped recording medium, and the cassette guide can be moved in the inserting direction of the recording medium and in a direction perpendicular to the inserting direction. The base that holds it, the stopper that is provided on this base, the latch lever that is rotatably supported on the cassette guide, the pin that is provided on this latch lever, and this pin that is always used as the stopper. And a spring for urging the latch lever in a predetermined direction so as to abut, and a movement restricting member is provided at the top of the pin to prevent the pin and the stopper from being disengaged from each other in the vertical direction. It

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In each of the following drawings, the same reference numerals denote the same parts or corresponding parts. 1 to 4 are views showing an embodiment of a disk device to which the present invention is applied, FIG. 1 is a plan view showing an internal configuration at the time of unloading with a cover omitted, and FIG. 2 is a plan view showing the internal structure of FIG. 3, FIG. 3 is a front view seen from the line 3-3 in FIG. 2, and FIG. 4 is a rear view seen from the line 4-4 in FIG.

As shown in FIGS. 1 and 2, each component is housed in a box-shaped base 10 having an open top. The base 10 is formed of a thin metal structure such as aluminum, and its upper surface is a cover (not shown) formed of a non-magnetic thin plate material such as aluminum for magnetic shielding and dust prevention. Is covered. As shown in FIG. 3, a front panel 13 having a cassette insertion opening 12 for inserting and ejecting the disc cassette 11 is attached to the front surface of the base 10. Further, a push button (eject button) 14 that is operated when ejecting the loaded disk cassette 11 is provided at the left end of the front panel 13.

In FIGS. 1 and 2, a cassette guide 15 for guiding the insertion, ejection, loading, and unloading of the disc cassette 11 is held in the base 10 so as to be movable up and down and back and forth. . The cassette guide 15 has a cross-sectional shape that guides and holds the disc cassette 11 that is inserted from the front side. Further, in the example shown in the figure, the rear portion (back portion) is cut away so that the left half of the cassette guide 15 is notched. It has a planar shape provided. Further, the cassette guide 15 is mounted in a position which is shifted to the right side with respect to the base 10 (rightward shift position), and a space for arranging other components is formed on the left side of the base 10. Has been done.

In FIGS. 1 and 2, a head having a head 17 for recording or reproducing information on a disc (information medium) in the disc cassette 11 is provided in a region of the notch 16 of the cassette guide 15. A seek mechanism 18 is provided. The head seek mechanism 18 is a mechanism for moving (seeking) the head 17 to an arbitrary track position along the radial direction of the disk.

A disc (magnetic disc or the like) as an information medium (medium) housed in the disc cassette 11 is opened by opening a slidable shutter 19 provided in the disc cassette. It can be accessed from the outside, such as by loading the head 17 from above.

In FIGS. 1 and 2, a vertical shaft 20 provided at the rear portion on the right side of the cassette guide 15 has a shutter lever 21 and a latch lever 22 which are swingable about the shaft above the cassette guide 15. Is pivotally supported. The shutter lever 21 is for opening and closing the shutter 19 of the head receiving opening of the disc cassette 11 in synchronism with the insertion of the disc cassette 11. A pin 23 is provided which is in contact with the front end of the shutter 19 and can be in contact with the edge of the shutter 19. Further, the shutter lever 21 is biased in the counterclockwise (counterclockwise) direction in the figure by a spring 25 stretched between the shutter lever 21 and the cassette guide 15. Further, on the upper surface of the cassette guide 15, a groove 26 having a predetermined length is formed so that the pin 23 can be moved along the movement trajectory of the pin 23.

In FIGS. 1 and 2, the latch lever 22 is biased in the counterclockwise (counterclockwise) direction by a latch spring 27, and in the unload state, as shown in FIG. A pin 29 provided at one end of the latch lever 22 is engaged with a front surface portion 28a of a stopper 28 formed on the base 10 so that the latch lever 22 is in a latch state. Further, a movement restricting member 29a slightly larger than the diameter of the pin 29 is fixed to the top of the pin 29. The other end of the latch lever 22 is provided with a pin 30 with which the tip of the inserted disk cassette 11 can come into contact. Thus, the side opposite to the cutout portion 16 of the cassette guide 15, that is, the side on which the head seek mechanism 18 and the cassette loading mechanism 33, which will be described later, are arranged (the space is reduced by bringing the cassette guide 15 and the disc cassette 11 together). The latch mechanism 22 is disposed on the side opposite to the side on which the latch mechanism 22 is formed.

6A and 6B are views showing the mounting parts on the bottom surface of the base 10 with the cassette loading mechanism, the head seek mechanism, etc. removed, FIG. 6A being a plan view and FIG. The front view seen from the line BB in the inside, and (C) is the side view seen from the line C-C in (A). In FIG. 6, a disk-shaped flat motor 31 for driving a disk is mounted on the bottom surface of the base 10 at a substantially central portion thereof, and the motor 31 has a central hole (not shown) of the disk cassette 11. ), A drive shaft 82 that engages with a drive hole (not shown) provided in the vicinity of the center hole of the disk cassette 11, and a magnet 83 for attracting and holding the hub of the disk. It is provided. A positioning pin 84 for positioning the disk cassette 11 in the loading state is provided behind the motor 31, and a part of the base 10 is cut and raised in the vicinity of the cassette insertion opening 12 (FIG. 3). A positioning surface 85 is provided. A circuit board 32 for controlling the disk device is joined around the motor 31.

In FIGS. 1 and 2, a cassette loading mechanism 33 for moving the cassette guide 15 to a loading position and an unloading position is arranged in a space formed on the left side of the cassette guide 15 in the base 10. It is set up. Further, the base 10 is provided with an operating lever 34 that extends across the upper side of the cassette guide 15 and that is pivotally supported by the base 10 at both ends so as to be swingable. The button lever 36 of the loading mechanism 33 is constantly urged toward the insertion port 12 by the return spring 35, and can be moved rearward against the return spring 35 by pushing the eject button 14. The operating lever 34 has its swinging position regulated by the button lever 36, and drives the cassette guide 15 to the load position and the unloading position by the swinging position.

7 to 10 are partial side views showing the states of the cassette loading mechanism 33 during unloading and loading. FIG. 7 shows the state of the button lever 36 during unloading, and FIG. 9 shows a state of the operating lever 34 and the cassette guide 15 at the time of unloading, FIG. 9 shows a state of the button lever 36 at the time of loading, and FIG. 10 shows a state of the operating lever 34 and the cassette guide 15 at the time of loading. The button lever 36 is slidably supported on the base 10 by a sliding guide portion composed of a pin and an elongated hole, and is always attached to the left side (front side) in the drawing by a return spring 35. It is energized. The actuating lever 34 is pivotally supported at its both ends by a fulcrum 37 provided on the base 10 so as to be swingable. Therefore, a notch 38 formed in the button lever 36 and a pin 39 provided on one side of the operating lever 34 are engaged with each other.

Further, cam grooves 40 are formed on both sides of the operating lever 34, and step-like holding portions 41 are provided on both sides of the base 10. On the other hand, on both sides of the cassette guide 15, a center pin 42 slidably engaged with the cam groove 40 of the operating lever 34 and a roller portion 43 abutting on the holding portion 41 of the base 10 are provided. Since the cassette guide 15 has a left half cutout shape as shown in FIGS. 1 and 2, the holding portion 41 and the roller portion 43 have a total of one location on the left side and two locations on the right and front sides. It is provided in three places.

Next, the operation of each part when loading and unloading the disc cassette 11 will be described with reference to FIGS. When the disc cassette 11 is inserted through the cassette insertion opening 12 (FIG. 3), first, the front end of the disc cassette 11 comes into contact with the pin 23 of the shutter lever 21 (FIGS. 1 and 2), and the shutter lever 21 in FIG. Rotate clockwise (clockwise). At this time, the pin 23 (FIGS. 1 and 2) of the shutter lever 21 comes into contact with the edge of the shutter 19 of the disc cassette 11, and the shutter 19 is opened according to the rotation of the shutter lever 21 (insertion of the disc cassette 11). By moving it against a return spring (not shown), the head receiving opening is opened, and the head 17 can access the disk (medium).

Next, the tip of the disc cassette 11 comes into contact with the pin 30 of the latch lever 22 (FIGS. 1 and 2), and the disc cassette 11 is further pushed (in the inserting direction), so that the latch lever 22 moves to the clock shown in the figure. The pin 29 of the latch lever 22 moves in the clockwise direction along the front surface portion 28a of the stopper 28 of the base 10 and is disengaged from the front surface portion 28a of the stopper 28. By releasing the latch, the cassette guide 15 which is restrained by the pin 29 can be moved to the rear of the apparatus (to the right in FIG. 8). The position of the disc cassette 11 in the forward direction in the cassette guide 15 is regulated by the pin 23 with which the tip of the disc cassette 11 abuts against the rear end of the groove 26 (FIG. 2).

When the disc cassette 11 is pushed further, the cassette guide 15 also moves to the rear side of the device. At this time, the pin 29 of the latch lever 22 moves with the movement of the cassette guide 15 and in contact with the front surface portion 28b of the stopper 28 by the urging force of the spring 27.

By the movement of the guide 15, the center pin 42 (FIGS. 8 and 10) of the cassette guide 15 horizontally moves in the cam groove 40 of the operating lever 34 in the right direction (rear side of the device) in the drawing, and The urging force of the return spring 35 acts on the pin 39 of the operating lever 34 via the button lever 36 to rotate the operating lever 34, and the operating lever 34 rotates about the fulcrum 37 as shown in FIG. To clockwise (clockwise). At the same time, the roller portions 43 (three places) of the cassette guide 15 also move to the rear side of the apparatus along the horizontal portion 41b of the holding portion 41. Since the pin 39 moves to the left side in the figure by the rotation of the operating lever 34, the button lever 36 also moves in conjunction with it. When the disc cassette 11 is pushed further, the roller portion 43 of the cassette guide 15 is lowered by a predetermined amount so as to move along the lower vertical portion 41c of the stepped holding portion 41, and the cassette guide 15 is shown in FIG. The cassette is loaded (the disc cassette 11 is in the loading position). At this time, as shown in FIG. 5B, the stopper 28 provided on the base 10 (FIG. 1) and the movement limiting member 29a of the pin 29 of the latch lever 22 are in contact with each other, and the pin 29 Are restricted from being moved with the cassette guide 15. Therefore, the pin 29 does not get under the stopper 28. Further, since the movement restricting member 29a has a disc shape, it prevents the pin 29 from slipping under the stopper 28 regardless of the contact position between the pin 29 and the stopper 28. The end of the latch lever 22 on the side where the pin 29 is provided is in a state of being lifted from the other end.

In the loading state where the cassette guide 15 is lowered downward, the cassette guide 15 is brought into contact with the lower holding surface (vertical surface) 41 c of the holding portion 41 of the base 10 and the cassette guide 15. The front and rear positions of 15 are restricted. Further, in this loading state, the disc cassette 11 is positioned in a mounted state by the positioning pins 84 and the positioning surface 85, and the cassette guide 15 is urged downward by the downward urging force of the operating lever 34. Energized. Therefore, the load position of the cassette guide 15 is determined by pressing and positioning the upper surface of the disk cassette 11 by the plurality of disk cassette pressing projections 86 (FIGS. 1 and 2) provided on the cassette guide 15. Regulated. When the cassette guide 15 is at the loading position, the disc (specifically, the hub portion) in the disc cassette 11 is magnetically attracted onto the rotor of the disc driving motor 31 (FIG. 6) and the rotor is By engaging with the upper center shaft 81 and the drive pin 82, the disk (media) is positioned (height direction, rotation direction). That is, it is set to a loading state in which information can be recorded and reproduced on the disc.

In this loading state, the center pin 42 of the cassette guide 15 is biased obliquely downward leftward in FIG. 10 by the top end side 40a of the upper surface of the cam groove 40 of the operating lever 34. The front and rear positions of the roller portion 43 are restricted by the lower vertical portion 41c of the holding portion 41 of the base 10, and the cassette guide 15 holds the disc cassette 11 with respect to the base 10 in a stable state.

When ejecting the disc cassette 11 set in the disc device, the eject button 14 (FIGS. 3 and 9) is pressed to move the button lever 36 rearward against the return spring 35. When the button lever 36 moves backward, first, the notch 38 of the button lever and the pin 39 of the actuating lever 34 are engaged with each other, so that the actuating lever 34 moves counterclockwise from the position shown in FIG. Rotate to the left). Next, the center pin 42 is lifted by the cam groove 40, and the cassette guide 15 moves upward. When the eject button 14 is pushed further, the roller portion 43 is disengaged from the lower holding portion (vertical portion) 41c due to the rise of the cassette guide 15, and the cassette guide 15 is movable to the front of the apparatus (leftward in FIG. 10). Becomes

When the eject button 14 is further pressed, the shutter lever 21 and the latch lever 22 are swung counterclockwise (counterclockwise) by the urging forces of the respective return springs 25 and 27 (FIGS. 1 and 2). , The disc cassette 11 is ejected forward, and the cassette guide 15 is moved forward. At this time, an elastic member for urging the cassette guide 15 forward may be provided in order to help the smooth movement of the cassette guide 15. In this embodiment, a spring member 87 (FIGS. 1 and 2) is attached between the operating lever 34 and the cassette guide 15. Further, the shutter spring 25 (FIGS. 1 and 2) may be used. In that case, one end of the shutter spring 25 is attached to the fixed side of the base 10 or the like or the operating lever 34. When the shutter lever 21 moves back in the groove 26 and returns, the pin 23 of the shutter lever 21 comes into contact with the front end of the groove 26, and a returning force is applied to the cassette guide 15. Thus, first, the cassette guide 15 is returned to the initial position of FIG. Then, when the pressing of the eject button 14 is stopped, the button lever 36 and the operating lever 34 are returned to the initial position (unload position) shown in FIGS. 7 and 8 by the biasing force of the return spring 35 (FIGS. 7 and 9). Be done.

As shown in FIGS. 1 and 2, a head seek mechanism 18 is arranged in the area of the cutout portion 16 of the cassette guide 15. FIG. 11 is a longitudinal sectional view of the head seek mechanism 18 portion taken along the line 10-10 in FIG. Next, the head seek mechanism will be described with reference to these drawings. In the illustrated example, the notch 16 is provided on the left side of the latter half of the cassette guide 15 and extends over about a quarter of the area. However, in some cases, the notch corresponding to this is provided in the latter half. It may be provided on the right side, and in that case, a mechanism corresponding to the head seek mechanism 18 is also provided on the right cutout region.

1, 2, and 10, the side where the cassette loading mechanism 33 including the button lever 36 and the like is disposed, that is, the cassette guide 15 is formed close to one side (the right side in the illustrated example). In the vicinity of the side edge inside the space (on the left side in the illustrated example), the cassette loading mechanism 33 and the head seek mechanism are arranged along the side edge of the disc cassette 11 in the insertion direction of the disc cassette 11. 18 are provided.

The head seek mechanism 18 includes a head driving motor 51 fixed to the rear wall of the base 10, a drive shaft 53 including a lead screw rotated by the motor 51 via a gear train 52, A head carriage 54 that engages with the lead groove of the drive shaft (lead screw) 53 and can reciprocate by the forward and reverse rotation of the drive shaft 53, and a guide bar for fitting the head carriage 54 and guiding the head carriage 54. 55, a lower head 17B attached to the tip of the head carriage 54, a head arm 57 attached to the head carriage 54 via a leaf spring 56 so as to be vertically movable, and a head arm 57 of the head arm 57. The upper head 17A attached to the tip and the head arm 57 are urged downward (toward the head load position). And a spring 58 for head load.

On the notch 16 side of the cassette guide 15, there is a bar 61 extending through the lower side of the head arm 57. A holder 90 is attached to one end of this bar 61 and the other end is the cassette guide. A bar 61 for head lift (unloading the head) is attached so as to be fixed to 15. The bar 61 is configured so that the bottom portion 90a of the holder 90 engages with the base 10 when the head is unloaded, as shown by the solid line in FIG.

With the above-described structure, when the cassette guide 15 is unloaded to move upward, the head arm 57 is lifted to the raised position as shown in FIG. 11, and the upper head 17A is held in the unload position. At this time, in order to reduce the thickness of the device while considering the force against the biasing force of the spring 58, the bar 61 supports the head arm 57 at a substantially central portion between its fixing point and the holding point of the head 17A. It is made to do.

[0034]

[Effect of device]

 As is apparent from the above description, by adopting the configuration according to the present invention, the engagement between the pin and the stopper is disengaged, and the pin goes under the stopper, which makes it impossible to eject the cassette. It is possible to prevent such a situation, and reliable loading and unloading of the cassette is realized.

Furthermore, since the pin height can be made as short as possible, it is possible to provide a disk device that can be made thin and highly reliable.

Further, since the movement restricting member has a disc shape, it prevents the pin from slipping under the stopper regardless of the contact position between the pin and the stopper.

[Brief description of drawings]

FIG. 1 is a plan view showing an unloaded state of an embodiment of a disk device to which the present invention is applied, with a cover removed.

FIG. 2 is a plan view showing a state when the disk device of FIG. 1 is loaded, with a cover removed.

FIG. 3 is a front view taken along line 3-3 in FIG.

FIG. 4 is a rear view taken along line 4-4 in FIG.

5A and 5B are enlarged views of a main part of the present embodiment, where FIG. 5A shows a state when the cassette guide is unloaded, and FIG. 5B shows a state when the cassette guide is loaded.

6A and 6B are views showing a configuration on a bottom surface of a base of the disk device shown in FIG. 1, in which FIG. 6A is a plan view, FIG. 6B is a front view seen from a line BB in FIG. ) Is a side view seen from line C-C in (A).

FIG. 7 is a partial side view showing a state when the button lever in FIG. 1 is unloaded.

FIG. 8 is a partial side view showing a state when the operation lever and the cassette guide in FIG. 1 are unloaded.

9 is a partial side view showing a state when the button lever in FIG. 2 is loaded.

FIG. 10 is a partial side view showing a state when the operating lever and the cassette guide in FIG. 2 are loaded.

11 is a vertical cross-sectional view of a portion of the head seek mechanism taken along the line 10-10 in FIG.

FIG. 12 is an enlarged explanatory diagram of a main part of the present embodiment.

13A and 13B are explanatory views showing a conventional example, in which FIG. 13A shows a state when the cassette guide is unloaded, and FIG. 13B shows a state when the cassette guide is loaded.

[Explanation of symbols]

 10 base 11 disc cassette 14 eject button 15 cassette guide 18 head seek mechanism 22 latch lever 27 latch spring 28 stopper 29 pin 29a movement limiting member 33 cassette loading mechanism

Claims (2)

[Scope of utility model registration request] 1. A cassette guide for accommodating a disk-shaped recording medium, a base for movably holding the cassette guide in the insertion direction of the recording medium and a direction perpendicular to the insertion direction, and a base provided on the base. A stopper, a latch lever rotatably supported on the cassette guide, a pin provided on the latch lever, and a spring for urging the latch lever in a predetermined direction so that the pin always contacts the stopper. And a movement limiting member provided at the top of the pin to prevent the pin and the stopper from being disengaged from each other in the vertical direction. 2. The disk device according to claim 1, wherein the movement restricting member has a disc shape.