JP3297232B2 - Recording / playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus which is most suitable for, for example, driving an eject mechanism of a floppy disk in a floppy disk drive.

[0002]

2. Description of the Related Art In a recording and / or reproducing apparatus, for example, a floppy disk drive, a disk cartridge is used.
Eject mechanisms for taking out cartridges (hereinafter referred to as cartridges) include a type in which an eject button is manually pressed to operate an eject mechanism, and a type in which a slide plate to which the eject button is attached is driven by a motor to eject. However, in the case where the cartridge is taken out or the cartridge is taken out after the writing or reading operation to the disk is completed, the latter type of ejecting mechanism in which the cartridge is taken out automatically is preferable. In this latter ejecting mechanism, for example, as seen in Japanese Utility Model Publication No. 5-39542, a motor, a speed reducing mechanism composed of a plurality of gears for reducing the rotation of the motor, and a power supply for the motor And a switch for turning on and off the switch, the switch is turned on and off by the rotation of the gear at the final output stage, and the slide plate is slid to eject the cartridge.

[0003]

By the way, in the above-mentioned speed reduction mechanism, the plurality of gears are each constituted by a gear with a pinion, and the drive gear attached to the drive shaft of the motor meshes with the first intermediate gear. Then, the second intermediate gear arranged beside the pinion of the first intermediate gear meshes with the pinion,
The pinion of the second intermediate gear is meshed with a third intermediate gear disposed beside the pinion, and the pinion of the third intermediate gear is meshed with the final gear. As described above, since the structure is such that the intermediate gears are connected side by side to reduce the speed, the distance between the output shaft of the motor and the gear shaft of the last stage becomes long, and the geared motor becomes large in space. This is an obstacle to downsizing the entire recording / reproducing apparatus.

A first object of the present invention is to reduce the gears around the drive shaft, prevent the reduction gears from spreading in a plane, and record / reduce the speed reduction gears. An object of the present invention is to provide a recording / reproducing apparatus capable of reducing the size of the entire reproducing apparatus.

A second object of the present invention is to provide a recording / reproducing apparatus in which a cam surface is formed on an outer peripheral surface thereof, so that a thickness in an axial direction can be reduced.

A third object of the present invention is to provide a recording / reproducing apparatus capable of shutting off a switch from the outside air and preventing malfunction due to adhesion of dust or the like.

[0007]

A first object of the present invention is to hold a recording medium and to have a holder having an ejection mechanism for ejecting the recording medium when the holder is in a detachable position.
The holder is slidably mounted, guides the holder to a mounting / detaching position and a driving position of the recording medium by a sliding operation. A slide member that is operable, a motor having a drive shaft,
A plurality of gear trains for decelerating the rotation of the drive shaft of the motor; a slide member drive unit provided at a position deviated from a rotation center of a final output gear which is a final stage of the gear train; Switch means for detecting the rotational position of the gear and interrupting the supply of power to the motor, arranging a drive shaft of the motor within the outer shape of the final output gear, and upon ejection, the motor is driven by the motor. The rotation of the final output gear engages the slide member drive unit with the slide member, slides the slide member to lock the slide member at a position corresponding to the attachment / detachment position, and moves the recording medium in the holder moved to the attachment / detachment position. Is achieved by a first means configured to discharge the gas.

[0008] The second object is the first means, wherein:
The final output gear is achieved by a second means in which an internal gear meshing with a reduction gear is formed on an inner peripheral surface thereof and a cam surface for controlling on / off of the switch is formed on an outer peripheral surface thereof. You.

[0009] The third object is the first means, wherein:
The tooth portion of each of the reduction gears is constituted by a spur gear and a pinion, is connected to the final output gear via an intermediate plate, and is achieved by a third means housed in a sealed container together with the switch means. Is done.

[0010]

In the first means, the reduction gears are gathered around the drive shaft so that the reduction gears can be prevented from spreading in a plane. / The overall size of the playback device can be made compact.

In the second means, since the cam surface is formed on the outer peripheral surface, the thickness in the axial direction can be reduced.

In the third means, the switch can be shut off from the outside air, and a malfunction due to the adhesion of dust or the like can be prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of a recording / reproducing apparatus when the present invention is applied to an ejection mechanism of a disk cartridge, and FIG. 2 is a partially cutaway front view showing a part of a slide plate of the ejection mechanism. FIG. 3, FIG. 3 is a plan view thereof, FIGS. 4 (a) to 4 (c) are front views, longitudinal sectional views, and bottom views showing a rear housing, and FIGS. 5 (a) to 5 (c) show intermediate plates thereof. Rear view, longitudinal sectional view, and front view, FIG.
(a) and (b) are a front view and a longitudinal sectional view showing the final stage gear, and FIGS. 7 (a) to 7 (c) are a front view, a longitudinal sectional view and a bottom view of the front housing, and FIGS. 9 (a) to 9 (c) and FIGS. 9 (a) to 9 (c) are explanatory diagrams showing the operation state, and FIG. 10 is a plan view showing the entire configuration. First, the overall configuration of the recording / reproducing apparatus will be described. FIG. 10 is an explanatory diagram showing an unloaded state of the recording / reproducing apparatus. In FIG. 10, a recording / reproducing apparatus 1 is supported between a housing 2 and a side plate of the housing 2 so as to be vertically movable with respect to a main body of the housing 2 and holds a cartridge (not shown) inserted from a cartridge insertion slot. Cartridge holder (hereinafter referred to as holder) 4
A turntable (not shown) that is exposed on the upper surface of the housing 2 and rotationally drives a magnetic disk housed in the cartridge case, a spindle motor (not shown) that rotationally drives the turntable, Turntable
(Not shown) A set of magnetic heads 6 and 6 for writing and / or reading signals to and from a magnetic disk loaded on a magnetic disk, and a carriage 7 and a hold case 8 for supporting the magnetic heads 6 and 6, respectively. And a carriage transfer device including a stepping motor for transferring the carriage 7 that supports the hold case 8 in a swingable manner in the radial direction of the magnetic disk. An eject lever 9 is rotatably attached to the holder 4. The eject lever 9 is always elastically urged in the ejecting direction of the cartridge by an eject spring 10, and an eject and a shutter opening / closing drive are provided at the rotating end of the eject lever 9. A pin 11 is provided. 9b is a support shaft of the eject lever 9.

Reference numeral 12 denotes a slide plate, and the holder 4 is moved upward by a slide mechanism of the slide plate 12 via a cam mechanism.
(In the direction away from the housing 2) or downward. The slide plate 12 is urged forward by a spring (not shown), and is slid rearward by a geared motor described later against the spring. When the slide plate 12 moves to the back side, the lock plate 5 locks the slide plate 12 at the pushed position.

The geared motor has a motor 1 at one end.
3 and a rear housing 15 made of synthetic resin formed so that a drive shaft 14 protrudes from the other end thereof, and three intermediate gears 16, 17, 18 in cooperation with the housing 15.
Plate 19 made of synthetic resin for rotatably supporting the plate
And a synthetic resin front housing 21 that accommodates a final stage gear 20, which is a final stage gear, therein. The rear housing 15 includes a sleeve portion 22 that fits and supports the motor 13, a rectangular outer peripheral wall 23 that forms a rear portion of a gear chamber that houses the intermediate gears 16, 17, 18, and the final stage gear 20, It is composed of a shaft portion 24 at the boundary between the portion 22 and the outer peripheral wall 23. As shown in FIGS. 4A to 4C, the shaft portion 24 of the rear housing 15 has
Pinion 26 attached to drive shaft 14 of motor 13
The shaft hole 29 into which the shaft 28 of the intermediate gear 17 is fitted, the shaft hole 31 into which the shaft 30 of the intermediate gear 17 is fitted, and the shaft 32 of the intermediate gear 18 are fitted. Shaft hole 3
3 are provided.

The intermediate gear 16 is provided with a spur gear portion 34 meshing with the pinion 26, a pinion 35, and a shaft 28 to which the spur gear portion 34 and the pinion 35 are attached. The shaft 28 protrudes from both sides. ing. Also, the intermediate gear 17
Are spur gear portions 3 meshing with the pinion 35 of the intermediate gear 16.
6, a pinion 37, a spur gear portion 36 and a pinion 37
Is provided, and the shaft 30 is protruded on both sides. Further, the intermediate gear 18 is provided with a spur gear portion 38 that meshes with a pinion 37 of the intermediate gear 17, a pinion 39, and a shaft 32 to which the spur gear portion 38 and the pinion 39 are attached. These intermediate gears 1
6, 17, 18 are arranged so as to surround the drive shaft 14 of the motor 13.

The intermediate plate 19 is connected to the rear housing 15.
5A and the rear end opening of the front housing 21, and the intermediate plate 19 has shafts 28 of the intermediate gears 16 and 17, as shown in FIGS. , 30, a shaft hole 40, 41 for fitting the other end of the intermediate gear 18, a step 43 for fitting and supporting the spur gear 38 of the intermediate gear 18 and the shaft 42 of the pinion 39, and coaxial with the step 43. A through hole 44 penetrated upward and through which the pinion 39 passes, and a support shaft 45 protruding from a surface of the intermediate plate 19 opposite to the surface on which the shaft holes 40 and 41 are formed are provided.

As shown in FIGS. 6 (a) and 6 (b), the final stage gear 20 has a cylindrical portion 46 protruding from one surface thereof and a cylindrical portion 4
6, a pinion 39 of the intermediate gear 17 formed on the inner peripheral surface
, And a slide member drive pin 48 that engages with the locking portion 12a of the slide plate 12 (FIGS. 2 and 3) of the eject mechanism, which is provided upright on the other surface. I have. A shaft hole 49 for loosely fitting the support shaft 45 of the intermediate plate 19 is formed in the center of the final stage gear 20, and a cam surface 50 is formed on the outer peripheral surface of the cylindrical portion 46 of the final stage gear 20. I have. This cam surface 50 is shown in FIG.
(b), as shown in FIG. 8 and FIG.
Constitute a higher cam surface 50a, and the remaining one third portion 50b is lower than the cam surface 50a. Shafts 28, 30, 32 of intermediate gears 16, 17, 18
Are arranged so as to be located within the outer shape of the final gear 20.

As shown in FIGS. 1 to 3 and FIGS. 7 (a) to 7 (c), the front housing 21 has a frame portion 51 defining a substantially rectangular outer periphery, and a slide of the final stage gear 20 substantially at the center. A front portion 53 having an opening 52 exposing an end portion on the member drive pin 48 side and a locking groove 25 formed on the outer peripheral surface of the rear housing 15 are elastically locked at the front end thereof so that the rear housing is formed. 15, three locking claws 5 for fixing to
4, 54, 54. In the upper part inside the front housing 21, a gap portion serving as the switch chamber 55 is formed. In this switch chamber 55, as shown in FIG. 2, the fixed plate 57 of the leaf switch 56 and the cam surface 50 of the final stage gear 20 are engaged, and the fixed plate 57 Leaf switch 56 which is turned on upon contact with
Each end of the movable plate 58 is supported. The leaf switch 56 is for cutting off the supply of power to the motor 13.

Next, the operation of this embodiment will be described with reference to FIGS. First, insertion of the cartridge will be described. Before inserting the cartridge, the holder 4 is in the upper position, and the slide plate 12 is
(a) It is locked at the position of the dashed line. In this state, when the cartridge is inserted, the lock of the slide plate 12 is released at the moment when the cartridge is completely inserted into the holder 4, and the slide plate 12 is driven to the loading position by the return spring in the direction of arrow A in FIG. (a). Then, the holder 4 is lowered to the lowered position via the cam mechanism by the movement of the slide plate 12, and the magnetic disk in the cartridge is mounted on the turntable.

Next, the auto-ejection operation of the cartridge will be described. Final gear 2 at start-up
0 is located as shown in FIG. 8 (a), and the tip of the movable plate 58 of the leaf switch 56 on the cam surface 50b is fixed to the fixed plate 5.
7, the leaf switch 56 is off. In this state, when power is supplied to the motor 13 for a predetermined time (until the leaf switch 56 is turned on) without passing through the leaf switch 56, the motor 13 starts rotating,
The spur gear portion 34 of the intermediate gear 16 is rotated from the pinion 26 attached to the drive shaft 14, and transmitted to the spur gear portion 36 of the intermediate gear 17 from the pinion 35, and the intermediate gear 17 is rotated.
Rotate while decelerating. Then, the spur gear portion 38 of the intermediate gear 18 is rotated via the pinion 37 while further reducing the speed. Further, the rotation of the pinion 39 causes the internal gear portion 47 of the final gear 20 to rotate. As a result, when the final stage gear 20 starts rotating counterclockwise in FIG. 8A, the slide member drive pin 48 is moved to the locking portion of the slide plate 12 of the eject mechanism as shown in FIG. 8B. 12a, and slides the slide plate 12 rightward in FIGS.

As the final stage gear 20 further rotates, the movable plate 58 of the leaf switch 56 rides on the cam surface 50a thereof and contacts the fixed plate 57 as shown in FIG. Turns on. Therefore, the motor 13
Is supplied with power via the leaf switch 56, and the final gear 20 can continue to rotate. In this way, the slide member drive pin 48 of the final stage gear 20
As shown in FIG. 9 (a), after sliding the slide plate 12 further to the right as far as possible, as shown in FIG. 9 (a),
The locking member 1 of the slide plate 12 is
Leave 2a. When the slide plate 12 is slid to the right as much as possible, the ejecting mechanism of the holder 4 operates as described above to eject the holder 4, and the slide plate 12 is moved by the lock plate to the position shown in FIG. Locked.

At this time, the cam surface 50 of the final stage gear 20 is still in operation.
The movable plate 58 of the leaf switch 56 rides on the fixed plate 5
7, the leaf switch 56 is turned on. Therefore, the motor 13 continues to rotate further, and the movable plate 58 of the leaf switch 56 is disengaged from the cam surface 50a of the final stage gear 20, and is located at a portion 50b lower than the cam surface 50a as shown in FIG. 9C. . As a result, the movable plate 58 of the leaf switch 56 is lowered, and the contact with the fixed plate 57 is released. At this time, the power supply to the motor 13 is stopped. However, when the motor 13 is energized for a predetermined time thereafter, the final stage gear 20 rotates to the position shown in FIG.

In the above-described embodiment, when the cartridge is housed and in the mounting / removing position, the holder 4 has an eject mechanism for ejecting the cartridge, and the holder 4 is attached to and detached from the cartridge. A slide plate 1 that is guided to a position and a drive position, and is locked at that position when slid to a detachable position.
2, a motor 13 having a drive shaft 14, and the motor 1
A plurality of reduction gears (16, 17, 18) for reducing the rotation of the third drive shaft 14, and a reduction gear (16, 17, 18);
The final stage gear 20 provided with a slide member drive pin 48 at a position deviated from the center of rotation while being rotated by the rotation of the final stage gear 20 and the rotation position of the final stage gear 20 is detected to cut off the supply of power to the motor 13. The drive shaft 14 of the motor 13 is disposed within the outer shape of the final gear 20, and the rotation of the final gear 20 driven by the motor 13 causes the slide member drive pin 48 to move the slide plate 1.
2 and the slide plate 12 is slid and locked to eject the cartridge. Therefore, the reduction gears (16, 17, 18) are gathered around the drive shaft 14, and each reduction gear is (16, 17, 18) can be prevented from spreading in a plane, and the reduction /
The entire playback device can be made compact.

In the above embodiment, the final stage gear 20 has an inner gear portion 47 formed on its inner peripheral surface to mesh with the reduction gear (16, 17, 18), and a leaf on its outer peripheral surface. Since the cam surface 50 for controlling ON / OFF of the switch 56 is formed, the thickness in the axial direction can be reduced.

In the above embodiment, the tooth portions of the reduction gears (16, 17, 18) are constituted by spur gears and pinions, and are connected to the final gear 20 via an intermediate plate 19. And the closed containers 15, 2 together with the leaf switch 56.
Since the leaf switch 56 is housed in the housing 1, the leaf switch 56 can be shielded from the outside air, and malfunction due to adhesion of dust can be prevented.

[0027]

According to the first aspect of the present invention, the respective reduction gears are gathered around the drive shaft, so that the reduction gears can be prevented from spreading in a plane, and the reduction gear portion is forcibly applied. Can reduce the size of the entire recording / reproducing apparatus.

According to the second aspect of the present invention, since the cam surface is formed on the outer peripheral surface, the thickness in the axial direction can be reduced.

According to the third aspect of the invention, the switch can be shut off from the outside air, and malfunction due to adhesion of dust or the like can be prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an eject mechanism of an embodiment of a recording / reproducing apparatus according to the present invention.

FIG. 2 is a front view showing a part of a slide plate of an eject mechanism of the recording / reproducing apparatus according to the embodiment of the present invention, with a part thereof cut away.

FIG. 3 is a plan view of one embodiment of a recording / reproducing apparatus according to the present invention.

FIGS. 4A to 4C are a front view, a longitudinal sectional view, and a bottom view showing a rear housing of an embodiment of the recording / reproducing apparatus according to the present invention.

FIGS. 5A to 5C are a rear view, a longitudinal sectional view, and a front view showing an intermediate plate of an embodiment of the recording / reproducing apparatus according to the present invention.

FIGS. 6 (a) and (b) are a front view and a longitudinal sectional view showing a final stage gear of an embodiment of the recording / reproducing apparatus according to the present invention.

FIGS. 7A to 7C are a front view, a longitudinal sectional view, and a bottom view of a front housing of the recording / reproducing apparatus according to one embodiment of the present invention.

FIGS. 8 (a) to 8 (c) are explanatory diagrams showing an operation state of an embodiment of the recording / reproducing apparatus according to the present invention.

FIGS. 9 (a) to 9 (c) are explanatory diagrams showing an operation state of an embodiment of the recording / reproducing apparatus according to the present invention.

FIG. 10 is a plan view showing an overall configuration of an embodiment of a recording / reproducing apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Slide plate 12a Locking part 13 Motor 14 Drive shaft 15 Rear housing 16, 17, 18 Intermediate gear 19 Intermediate plate 20 Last gear 21 Front housing 47 Internal gear 48 Slide member drive pin 50 Cam surface 55 Switch chamber 56 Leaf switch

Claims (3)

(57) [Claims] And a holder having an ejecting mechanism for ejecting the recording medium when the recording medium is stored and in a loading / unloading position. The holder is slidably mounted. A motor having a drive shaft, which is guided at the drive position and is locked at that position when slid to a position corresponding to the attachment / detachment position, and which can operate the eject mechanism; A plurality of gear trains for decelerating the rotation of the shaft; a slide member driving unit provided at a position deviated from a rotation center of a final output gear which is a final stage of the gear train; and a rotational position of the final output gear Switch means for detecting the power supply to the motor and interrupting the supply of power to the motor, wherein the drive shaft of the motor is arranged within the outer shape of the final output gear. At the time of ejection, the rotation of the final output gear driven by the motor causes the slide member drive unit to engage with the slide member and slide the slide member to lock the slide member at a position corresponding to the attachment / detachment position. A recording / reproducing apparatus, wherein the recording medium in the holder moved to a position is discharged. 2. The final output gear according to claim 1, wherein an inner gear meshing with the reduction gear is formed on an inner peripheral surface of the final output gear, and a cam surface for controlling on / off of the switch is formed on an outer peripheral surface of the final output gear. A recording / reproducing apparatus characterized by being formed. 3. The method according to claim 1, wherein
The tooth portion of each of the reduction gears is composed of a spur gear and a pinion, is connected to the final output gear via an intermediate plate, and is housed in a closed container together with the switch means. / Reproducing device.