JPH0510747B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a record carrier storage container attachment/detachment device in a recording or reproducing apparatus that loads and uses a record carrier storage container that stores a record carrier.

(Background Art) For example, in a recording or reproducing apparatus that forms recording tracks concentrically or spirally on a disc-shaped record carrier such as a magnetic sheet and records or reproduces information on the disc-shaped record carrier, a record carrier containing a magnetic sheet is used. A type in which a cassette, which is a storage container, is inserted into a cassette holder provided in the recording or reproducing apparatus main body from the front of the recording or reproducing apparatus main body is known as a front loading system.

The conventional front loading type cassette loading/unloading device and the insertion and ejection of cassettes will be explained with reference to FIG. 1. Reference numeral 2 denotes a cassette for storing a magnetic sheet (not shown), 8 a cassette holder,
66 is a slide plate that slides in the direction of arrow A or B within the slit of cassette holder 7. One end of the slide plate 66 protrudes into the inside of the cassette holder 7 and has a discharge end 68 that comes into contact with the leading end of the cassette 2 on the insertion side, and the lower end of the slide plate 66 and the lower end of the cassette holder 7 on the insertion side of the cassette 2 are connected to each other. A spring 67 is installed between the two parts. This spring 67 urges the slide plate 66 in the direction of arrow B.

When cassette 2 is inserted into cassette holder 7,
The insertion end of the cassette 2 comes into contact with the ejection end 68 of the slide plate 66. If the cassette 2 is pushed in further, the slide plate 66 slides in the direction of arrow A against the force of the spring 67, and when pushed in a predetermined amount, the cassette 2 is clamped by a clamping mechanism (not shown).
With the cassette 2 being held, the cassette holder 7 is lowered and the cassette 2 is loaded into the main body of the recording or reproducing apparatus.

When the cassette 2 is ejected, when the cassette holder 7 rises from the loading position to the illustrated position, the clamping operation of the cassette 2 by the clamping mechanism (not shown) is released. As a result, the return force of the spring 67 acts on the slide plate 66, and the cassette 2 is moved in the direction of arrow B by the discharge end 68, allowing the cassette 2 to be taken out.

According to the cassette loading/unloading device constructed in this manner, when the cassette 2 is inserted, the cassette 2 is inserted against the force of the spring 67 acting on the slide plate 66, so that the cassette 2 is inserted by the clamping mechanism (not shown). During a short period of time until it is clamped by the cassette 2, the restoring force of the spring 67 causes the cassette 2 to move slightly in the direction of the arrow B, causing its insertion position to shift. Further, when the cassette 2 is ejected, when the clamping action of the unillustrated clamping mechanism on the cassette 2 is released, the slide plate 66 rapidly slides in the direction of arrow B due to the return force of the spring 67, so that the cassette 2 pops out.

The above-described cassette loading/unloading device has the disadvantage that loading and unloading operations of the cassette cannot be carried out smoothly.

Therefore, instead of manually loading and unloading the cassette, we used the driving force of the motor to detect the insertion of the cassette into the holder, drive the motor, and smoothly move the holder to the recording or playback position. A so-called autoloading system has been proposed.

However, according to the above-mentioned autoloading system, simply providing a sensor for detecting the cassette as a means for detecting the insertion of the cassette would complicate the configuration, and the holder would have to be moved by a predetermined amount when the cassette is inserted. If the detection method is adopted, the motor and drive transmission mechanism used to drive the holder become a load, resulting in problems such as not being able to perform the cassette insertion operation smoothly or a poor operating feel. It was not possible to realize a loading system.

(Objective) The present invention has been made in order to solve the above-mentioned problems, and is a recording or reproducing method in which a record carrier storage container containing a record carrier is loaded from a detachable attachment/detachment position to a predetermined recording or reproduction position. In the apparatus, a holder for transporting a record carrier storage container is driven by a motor, a driving force can be transmitted from the motor side to a holder moving mechanism side, and a driving force is transmitted from the holder moving mechanism side to the motor side. By providing a unidirectional drive transmission means that prevents the transmission of force, the holder can be loaded and unloaded smoothly, and the insertion force required for manual operation when inserting a cassette into the holder is reduced. The object of the present invention is to provide a record carrier storage container loading/unloading device.

(Description of Embodiments) (FIGS. 2 to 9) Hereinafter, the means taken in the present invention to achieve the above object will be illustrated and explained using the embodiments shown in the figures.

Note that in the following embodiments, a loading/unloading device for a record carrier storage container storing a magnetic sheet in which the record carrier is a disc-shaped record carrier is explained, but the present invention is applicable to a magnetic, optical, or capacitive type. In addition to devices that use disks or sheet cassettes,
Of course, the present invention can be applied to devices using tape cassettes such as VCRs.

2 to 9 show an embodiment of the record carrier storage container loading/unloading device of the present invention, FIG. 2 is a perspective view of the device, FIG. 3 is a top view thereof, and FIG. A side view of the record carrier storage container and the gear mechanism of its loading/unloading device, FIG. 4b shows the gear meshing with the first sliding plate, the second partially toothed gear, and the rack in the state shown in FIG. 4a. FIG. 5 is a side view of the gear mechanism holding the record carrier storage container while the second slide plate is moving; FIG. 6 is an explanatory diagram of the operating state of the center core pressing member and pad; FIG. 7 is a perspective view of the one-way clutch installed in the gear unit,
FIG. 8 shows a control circuit diagram for the loading motor, and FIG. 9 shows a configuration diagram of a cassette insertion detection switch and a cassette ejection completion detection switch.

An embodiment of the present invention will be described with reference to FIGS. 2 and 3.

1 is a magnetic sheet which is a disc-shaped record carrier; 2 is a cassette which is a record carrier storage container for storing the magnetic sheet 1; 3 is a synthetic resin center core attached to the center of the magnetic sheet 1; 4 is a center core 3. This is the PG pin used for pulse generation embedded in the . 5 is a spindle insertion hole provided around the center core 3 of the cassette 2 into which the spindle of the disk motor is inserted; 6 is a pad insertion window provided in the cassette 2, which will be described later; A magnetic head insertion window is provided on the lower surface where the pad insertion window 6 is positioned.

Reference numeral 7 designates a cassette holder which is a record carrier storage container holding means for storing the cassette together with a second slide plate 31 which will be described later and which holds the inserted cassette 2. Two pins 12 are provided on the sides of the cassette holder 7, as shown in FIG. There are also two pins 12' on the other side as shown in
has been planted. Reference numeral 8 denotes side plates fixed to the chassis of the main body of the recording or reproducing apparatus (not shown) with fixing members such as screws, and are arranged on both sides of the cassette 2. Reference numeral 9 indicates a long groove that extends vertically through two holes formed in the side plate 8.
It is a long groove that has holes in it and extends in the vertical direction. These long grooves 9 and 16 are connected to two pins 12 set on the side of the cassette holder 7 and one pin 17 set on the side of the pad 44, which will be described later.
It has a function that does not prevent the vertical movement of the Note that the other side plate 8 also has two grooves except for the long groove 16.
Similarly, several long grooves 9 are provided. A first slide plate 10 is adjacent to the side plate 8, and has a rack 11 fixedly attached to one lower end thereof and serves as a first moving means. This first slide plate 1
0 has two long grooves 15 extending horizontally, and "〓"
Two cam grooves 13 having the shape of
A large cam groove 18 having a similar shape and controlling the vertical movement of the pad 44 is provided.
A rack 11' is similarly fixed to the other side plate 8,
Furthermore, two long grooves 15 and two cam grooves 13 for controlling the vertical movement of the cassette holder 7 are also provided (FIG. 3). 14 is the first slide plate 1
This pin is used to limit the amount of slide of the first slide plate 10 and to guide the sliding movement of the first slide plate 10 along the side plate 8. It is slidably engaged with the long groove 15 of. Such a pin 14 is similarly planted on the other side plate 8, and the first
is engaged with the long groove 15 of the slide plate 10. 1
Reference numeral 7 denotes a pin installed on the side surface of the pad 44, and is slidably engaged with the long groove 16 of the side plate 8 and the cam groove 18 of the first slide plate 10.

Reference numeral 19 indicates a first slide plate 10 and a second slide plate to be described later.
This is a loading motor that operates as a drive source for operating a drive mechanism for sliding the slide plate 31 of the cassette 2 and loading or unloading the cassette 2. A worm gear 20 is rotated by the loading motor 19. 21 is a worm wheel that meshes with the worm gear 20, 22 is a gear coaxially connected to the worm wheel 21, and 23 is a gear 2.
The gear 2 meshes with the worm wheel 2, and is rotated by receiving driving torque from the gear 22, which rotates coaxially with the worm wheel 21. 24 controls the rotation of the gear 23 through a rack 29 fixed to the second slide plate 31.
A gear unit for transmitting the rotation of the gear 23 to the slide plate 31 of the rack 29,
A one-way clutch is provided that does not transmit the movement of the rack 29 to the gear 23. A specific example of this gear unit 24 will be described later with reference to FIG. The first slide plate 10 applies rotation of the loading motor 19 to the rack 11 via a worm gear 20, a worm wheel 21, a gear 22, a first partially toothed gear 25, a second partially toothed gear 27, and a gear 26. and is slid in the direction of arrow A or B shown in FIG. A series of gear shafts 37, 40, and 41 for sliding the first slide plate 10 and the second slide plate 31 are connected to the chassis 5 shown in FIG.
1.

Reference numeral 28 denotes a lever, which is coaxially connected to the first partially toothed gear 25 and the second partially toothed gear 27, and includes a rack 29 fixed to a second slide plate 31, which will be described later.
The lever 57 on the side of the lever 57 moves in the direction of arrow A and comes into contact with the lever 28 to rotate clockwise, thereby rotating the first partially toothed gear 25 and the second partially toothed gear 27 clockwise. They mesh with gears 22 and 26, respectively.

Note that the first partially toothed gear 25 and the second partially partially toothed gear 2
7, and the position of the toothless portion is between the first toothless gear 25 and the second toothless gear in the clockwise rotation direction, as shown in FIG. 4b described later. The angles in the circumferential direction of the toothless portions of the toothed gears 27 are the same, but the clockwise end of the toothless portion of the first toothless gear 25 is the same as the clockwise angle of the toothless portion of the second toothless gear 27. It precedes the end in the direction.
Therefore, when the lever 28 is rotated clockwise due to contact with the lever 57, the first partially toothed gear 25 and the second partially partially toothed gear 27 are also rotated clockwise at the same time, and the first partially partially toothed gear 25 and the second partially partially toothed gear 27 are rotated clockwise at the same time. The toothed gear 25 meshes with the gear 22, and then the first partially toothed gear 25 is rotated clockwise by the gear 22, thereby forming the second partially partially toothed gear 27.
meshes with gear 26.

Reference numeral 30 denotes a rotating shaft that connects gears 26 and 26' which are respectively meshed with racks 11 and 11' fixed to the first slide plate 10, and connects one first slide plate 10 and the other. A driving force is transmitted to simultaneously slide the first slide plate 10 in the same direction.

Next, a description will be given of the second slide plate 31, which constitutes a record carrier storage container holding means that is provided with a cassette holding means, which will be described later, and is movable in the cassette insertion direction and the loading direction.

The plate spring 34 attached to the second slide plate 31 and the cassette receiving part 35 constitute a clamping means, and the plate spring 34 and the cassette receiving part 35 clamp the cassette 2. The plate spring 34 is controlled by the position regulating portion 36, which is a position regulating means for the free end 34a of the plate spring 34.
The second slide plate 31 is manually pushed into the cassette holder 7 until the free end 34a of the leaf spring 34 is in the position immediately before it is restricted (the first position), and the free end 34a of the leaf spring 34 is positioned by the restriction part 36. At the position immediately before the restriction (first position), a cassette insertion detection switch (not shown) is activated.
) is activated to start supplying power to the loading motor 19, and the rotation of the loading motor 19 causes the second slide plate 31 to pull in the cassette holder 7, and the free end 34 of the leaf spring 34
A is regulated in position by the regulating part 36, pulled into the lower surface of the cassette holder 7, a pressing force is applied to the cassette 2, and the cassette 2 is held with a large force.

Reference numeral 32 designates a pin for guiding the sliding movement of the second slide plate 31 in the direction of arrow A or B, and is mounted on the cassette holder 7. 33 is a long groove formed in the second slide plate 31 and has a shape that extends long in the direction of movement of the cassette holder 7;
The pin 32 described above is engaged with this long groove 33. The leaf spring 34 is attached to the upper end of the second slide plate 31, and an inelastic cassette receiving portion 35 is provided at the lower end of the second slide plate 31. The leaf spring 34 and the cassette receiving part 35 constitute a clamping means as described above, and the cassette 2 is clamped between them (FIG. 6). Reference numeral 29 denotes a rack fixed to the second slide plate 31, and a lever 57 is installed on the side surface of the rack, which moves with the sliding movement of the second slide plate 31 in the direction of arrow A or B. When the second slide plate 31 slides in the direction of arrow A, the rack 29 also moves in the direction of arrow A, and the lever 5
7 is brought into contact with the lever 28, and the first partially toothed gear 25
and the second partially toothed gear 27 in the clockwise direction. This rack 29 meshes with the gear unit 24.

Gear shafts 37, 40 and 41 shown in FIG.
5, the second partially toothed gear 27, and the lever 28, and the gear shaft 41 pivotally supports the gear 23, respectively. In addition, 3
A retaining ring 8 is provided between the gear unit 24 and the gear shaft 37.

42 is a detection yoke which is a component of a pulse generator that detects the rotational phase of the magnetic sheet 1 by detecting the PG pin 4 of the magnetic sheet 1; 43 is a support arm to which the detection yoke 42 is attached;
4, and moves up and down together with the pad 44. This pad 44 performs a downward movement to closely oppose the upper surface of the magnetic sheet 1 through the pad insertion window 6 of the cassette 2, thereby stabilizing the contact state between the magnetic head 56 and the magnetic sheet 1 that abuts the lower surface of the pad 44. . Reference numeral 45 denotes a guide shaft that penetrates inside the pad 44 and is set up on a mounting chassis 58 (FIG. 6).

46 is a center core pressing member for mounting the center core 3 of the magnetic sheet 1 in the cassette 2 on the spindle 53 of the sheet rotation motor. A support shaft 47 rotatably supports the center core pressing member 46, and is fixed to a chassis (not shown). 4
Reference numeral 9 denotes a direct-acting cam, which is fixed to the side surface of the other first slide plate 10. Reference numeral 48 denotes a pin that is set up at the arm bent end 48' (FIG. 6) of the center core pressing member 46, and is in contact with the linear motion cam 49. Reference numeral 50 denotes a spring, which is mounted between the arm bent end 48' of the center core pressing means 46 and a chassis (not shown), so that the end 48' where the pin 48 is provided is always directed downward, i.e. Pressing member 4
6 in a counterclockwise direction around a shaft 47.

Figures 4a and 4b show the operating states of the cassette and gears during insertion; in Figure 4a, cassette 2
is inserted into the cassette holder 7 from the direction of arrow C, the tip of the cassette 2 is held between the leaf spring 34 provided on the second slide plate 31 and the cassette receiving part 35, and then the cassette is inserted by hand in the direction of arrow A. 2
Push in. At this point, the loading motor 19 has not yet been activated. Loading motor 1
The worm gear 20 meshes with the worm wheel 21, the gear 22 coaxially connected with the worm wheel 21 meshes with the gear 23, and the gear 23 meshes with the gear 24. Since the lever 57 provided on the side surface of the rack 29 fixed to the second slide plate 31 is in a position not shown,
Lever 2 coaxially connected to first partially toothed gear 25
8' is not rotated clockwise by the lever 57,
Therefore, the toothless portion of the first toothless gear 25 is the gear 22.
The gear 22 and the first partially toothed gear 25 do not mesh with each other.

Regarding the second partially toothed gear 27, as shown in FIG. There is no engagement with the The first slide plate 10 does not perform a sliding operation because the loading motor 19 is not activated, and therefore the first slide plate 10 does not perform a sliding operation.
2 is located above the cam groove 13.

FIG. 5 shows that the cassette 2 is held by the holding means,
The gear mechanism being driven is shown when the cassette 2 is pushed in by hand and then pulled in by the driving of the loading motor.

As shown in FIG. 4a, the second slide plate 31
The tip of the cassette 2 is held between the leaf spring 34 and the cassette receiving part 35, and then the tip of the cassette 2 is held in place by the arrow A.
push in the direction. This pushing action causes the second
The slide plate 31 slides in the direction of arrow A.
As a result, the rack 29 also moves in the direction of arrow A. Gear unit 2 meshing with rack 29
Since gear 4 is provided with a one-way clutch, it does not impart any rotation to gear 23. By sliding the second slide plate 31 in the direction of arrow A, the leaf spring 34 and the cassette receiving part 35 are pulled in along the regulating part 36 while holding the cassette 2, and the free end 34a of the leaf spring 34 is pulled into the regulating part 36. Part 3
6, it is regulated downward. As shown in FIG. 5, when the free end 34a of the leaf spring 34 is fully retracted, the clamping force against the cassette 2 becomes very large. As mentioned above, the free end 34 of the leaf spring 34
At the position (first position) immediately before the position a is restricted by the restriction portion 36, a cassette insertion detection switch (FIG. 8), not shown, is activated, and the loading motor 19 starts rotating.

When the loading motor 19 rotates in a predetermined direction, the rotation is applied to the gear 23 via the worm gear 20, worm wheel 21, and gear 22, and the gear 23 rotates clockwise. When the gear unit 24 is rotated counterclockwise due to the clockwise rotation of the gear 23, the one-way clutch provided in the gear unit 24 transmits the counterclockwise rotation of the gear unit 24 to the rack 29. Through this, the second slide plate 31 is moved in the direction of arrow A.

On the other hand, the lever 5 provided on the side of the rack 29
7 also moves in the direction of arrow A and comes into contact with lever 28,
Rotate this clockwise. This allows the first
The second partially toothed gears 25 and 27 rotate clockwise, and the first partially partially toothed gear 25 meshes with the gear 22.
When the first partially toothed gear 25 is reversed clockwise,
At the same time, the second partially toothed gear 27 is further rotated clockwise and meshes with the gear 26. Therefore, the rotational torque of the loading motor 19 is transmitted to the rack 11 via the worm gear 20, the worm wheel 21, the gear 22, the first partially toothed gear 25, the second partially toothed gear 27, and the gear 26. slide plate 1
0 starts sliding in the direction of arrow A.

Referring to FIG. 6, the structure of the pad 44 and center core pressing member 46 will be explained.

The pad 44 is located at the arrow A on the first slide plate 10.
It is lowered by the sliding movement in the direction, and descends along the guide shaft 45 from the initial position shown by the two-dot chain line to the position shown by the solid line. As the pad 44 descends, the detection yoke 42 and detection coil 52, which are components of the pulse generator attached to the support arm 43, descend together to face the PG pin 4 embedded in the center core 3.

Moreover, the center core pressing member 46
By positioning the direct-acting cam 49 fixed on the side surface of the slide plate 10 from the low-lift surface to the high-lift surface, the cam 49 rotates in the direction of arrow D about the rotation center axis 47, as shown by the two-dot chain line. The tip 4 of the center core pressing member 46 is moved from the position shown by the solid line to the position shown by the solid line.
6' applies a pressing force to the center core 3 to force it into the spindle 53 of the seat rotation motor 54.
Then, as the linear-acting cam 49 further moves in the direction of arrow A as shown in FIG. Return to initial position. Note that if the low lift surface on the left side of the high lift surface of the direct-acting cam 49 is made slightly higher than the low lift surface on the right side, the center core pressing member 46 will be placed at a position slightly away from the position indicated by the solid line. It can be held in an elevated position. In this case, the direct-acting cam 49 is connected to the cassette holder 7.
The center core pressing member 46 is actuated during the remaining sliding stroke of the first slide plate 10 in the direction of arrow A after the first slide plate 10 is lowered to the loading position (second position).

A magnet 55 is provided on the spindle 53, and exerts a magnetic attraction force on a soft magnetic member (not shown) embedded in the center core 3, thereby facilitating attachment of the center core 3.

In FIG. 7, the rack 29 is interposed between the drive source side and the second slide plate 31, and the power from the drive source side is transmitted to the rack 29, but the movement of the rack 29 is from the drive source side. The gear unit 24 is shown equipped with a one-way clutch, which is a one-way power transmission means that does not transmit power to the vehicle.

A first gear 64 meshes with the gear 23 on the drive source side (Fig. 2), and is supported by a shaft 37.
A flange 60 rotates together with the gear 64. This flange 60 is provided with a notch 61, into which one end of a coil spring 62 is fitted. 59 is a second gear, a cylindrical portion 65 rotates together with the gear 59, and a coil spring 62 is wound around the cylindrical portion 65. Note that the gear 59 meshes with the rack 29.

In such a configuration, when inserting cassette 2, when inserting cassette 2 by a guided operation,
Since the first slide plate 31 is pushed in its insertion direction, the rack 29 moves in the direction of arrow A.
As a result, the gear 59 rotates counterclockwise around the gear shaft 37, and the cylindrical portion 65 connected to the gear 59 also rotates counterclockwise. Since the rotation at this time is in the direction in which the coil spring 62 is unwound, that is, in the direction in which it is expanded, the coil spring 62
slips relative to the cylindrical portion 65, only the gear 59 and the cylindrical portion 65 rotate counterclockwise, and no power from the movement of the rack 29 is transmitted to the gear 64. When the cassette 2 is further pushed in the direction of arrow A, a cassette insertion detection switch (not shown) is activated, and the loading motor 19 starts rotating.
Rotation is applied to the gear 64 through the gear train of the worm gear 20, worm wheel 21, gear 22, and gear 23 described in FIG. 5, and the gear 64 rotates counterclockwise. As a result, rotation is applied to the coil spring 62 via the flange 60 that rotates together with the gear 64 and the notch 61, the coil spring 62 is wound around the cylindrical portion 65, the rotation is transmitted to the gear 59, and the rack 29 is rotated. is further moved in the direction of arrow A.

When the cassette is ejected, the gear 64 is provided with the rotation of the loading motor 19 via the gear train described above, and rotates clockwise. The clockwise rotation causes the coil spring 62 to rotate in the unwinding direction, and the frictional force generated between the coil spring 62 and the cylindrical portion 65 at this time is controlled by the weight of the cassette 2 applied to the rack 29.
By setting the one-way clutch so as to overcome the load caused by the frictional force between the second slide plate 31 and the cassette holder 7, it is possible to generate idling torque in the one-way clutch, and this idling torque causes the one-way clutch to move in the direction of arrow B. I can do it.

According to the one-way clutch configured in this way, when the cassette 2 is ejected, the gear 64
When the is rotated clockwise by the power from the drive source, the flange 60 and the coil spring 62 rotate clockwise together, and the frictional force existing between the coil spring 62 and the cylindrical portion 65 causes the flange 60 and the coil spring 62 to rotate idly. Torque is generated, and the cylindrical portion 65 rotates clockwise together with the gear 59, sending the rack 29 in the direction of arrow B.

Since the coil spring 62 is configured to rotate with respect to the cylindrical portion 65, its torque transmission efficiency is high, and the idling torque increases.
The gear 59 can be rotated more reliably.
Therefore, the ejection operation when ejecting the cassette 2 becomes reliable.

By the way, cassette 2 added to rack 29
A certain amount of load is applied to the rack 29 due to the weight of the rack 29 and the frictional force between the second slide plate 31 and the cassette holder 7, and the rack 29 generates an idling torque large enough to slightly overcome this load. By utilizing this, the cassette 2 can be ejected. Therefore, in order to generate enough idling torque to slightly overcome the load applied to the rack 29 side without increasing the idling torque when the cassette 2 is ejected, a coil spring with a low spring constant is used. Furthermore, since the spring constant of the coil spring is low, only a small amount of force is required when manually pushing in cassette 2, and it is possible to eject cassette 2 even when inserting cassette 2. Operation becomes smooth.

FIG. 8 shows an example of a control circuit for the loading motor 19 for performing the above-described cassette loading and unloading operations.

In the figure, SW _M is the main switch, which is connected to the power supply +V _CC via resistor _R1 . SW _C
is provided, for example, in a part of the cassette holder 7 shown in FIGS. 2 and 3, and when the second slide plate 31 slides in the direction of the arrow A, the free end 34a of the leaf spring 34 comes into contact with the restriction part. A normally open type cassette insertion detection switch is provided to be opened by the second slide plate 31 immediately before the cassette insertion detection switch engages with the main switch SW M and is connected in series with the main switch SW _M together with the resistor R ₂ . It is connected. SW _L is
For example, the first slide plate 10 shown in FIGS. 2 and 3
A normally closed cassette loading completion detection switch is provided to be opened by the first slide plate 10 at the end position of the sliding movement in the direction of arrow A, and is connected in series with the main switch SW _M together with a resistor _R3 . It is connected. SW _E is a normally closed eject switch that is opened by operating an eject key (not shown), and is connected in series with the main switch SW _M together with a resistor _R4 . SW _U
is provided, for example, in a part of the cassette holder 7 shown in FIGS. 2 and 3, and when the second slide plate 31 slides in the direction of arrow B, the free end 34a of the leaf spring 34 is restricted. After the second slide plate 31 is removed from the part 36 and the clamping force is weakened,
This is a normally closed type cassette ejection completion detection switch that is set to open when the main _{switch SWM} is opened. FF ₁
is set by the potential change from high to low at the connection point between the cassette insertion detection switch SW _C and the resistor R ₂ , and then the cassette loading completion detection switch SW _L is set.
The first RS flip-flop, _{FF2 ,} is a falling synchronization type connected to be reset by a change in potential from high to low at the connection point between the switch SW _E and the resistor _R4 . After being set by a change in the potential at the connection point from high to low, it is reset by a change in potential from high to low at the connection point between the cassette ejection completion detection switch SW _U and the resistor _R5 . The second RS flip-flop is of falling synchronous type, and the MCC is the first one.
In response to the high level of the Q output of the second FF ₁ , the loading motor 19 is rotated forward (clockwise in the above example) for loading the cassette, and in response to the high level of the Q output of the second FF ₂ . _The loading motor 19 is reversed (counterclockwise rotation) for ejecting, and the loading motor ₁ is
9 is a motor control circuit configured to stop the motor.

In the above configuration, when loading a cassette, after closing the main switch SW _M , the cassette 2
By inserting and pushing slightly, the second slide plate 31 slides in the direction of arrow A, and the leaf spring 34
When the free end 34a of the cassette insertion detection switch _SW
Since FF1 is opened, the first FF ₁ is set and its Q output becomes high level. As a result, the motor control circuit MCC rotates the loading motor 19 in the normal direction for loading the cassette. As a result, the various operations for loading the cassette described above are performed. Then, at the end of cassette loading, when the first slide plate 10 reaches the end position of the sliding movement in the direction of arrow A and the cassette loading completion detection switch _SWL is opened, the first FF ₁ is reset. The Q output becomes low level, and the motor control circuit MCC stops normal rotation of the motor 19.

Next, when ejecting the cassette, when the eject key (not shown) is operated to release the eject switch SW _E , the second FF ₂ is set and its Q output becomes high level. This causes the motor control circuit MCC to reversely rotate the motor 19 to eject the cassette. As a result, the operations for ejecting the cassette described above are performed. At the end of cassette ejection, the second slide plate 31 moves toward arrow B.
When the free end 34a of the leaf spring 34 separates from the regulating part 36 and a part of the cassette 2 protrudes from the exterior of the recording or reproducing apparatus, the cassette ejection completion detection switch is activated.
Since SW _U is opened, the second FF ₂ is reset and its Q output becomes low level. As a result, the motor control circuit MCC stops the reverse rotation of the loading motor 19.

FIG. 9 shows a specific example of the switches SW _C and SW _U described above and their arrangement, and is a view of the cassette holder 7 seen from below the second slide plate 31.

In the figure, conductor patterns P ₁ and P ₂ are provided on the lower side of the upper surface of the cassette holder 7, that is, on the ceiling surface.
The conductor patterns P ₁ and P ₂ are provided on a surface covered with an insulating member. The sliding brushes BR ₁ to _{BR 4} are fixed to the upper surface of the second sliding plate 31 with fixing members such as screws, but the second sliding plate 31 is coated with an insulating material so that the entire second sliding plate 31 does not exhibit conductivity. provided on the surface. The brushes BR ₁ and BR ₂ constitute a switch SW _C , and the brushes BR ₃ and BR ₄ constitute a switch SW _C. Note that x indicates the cassette ejection completion position, and y indicates the cassette manual insertion completion position. With this configuration, the switches BR ₁ to _{BR 4} provided on the second slide plate 31 are connected to the second slide plate 31.
The switch SW C slides with the sliding movement in the direction of arrow A or B. In the sliding movement in the direction of arrow A, switch SW _C is released at the manual insertion completion position, and in the sliding movement in the direction of arrow B, switch SW C is released.
SW _U is opened at the ejection completion position. The arrangement of these switches is such that the brushes BR 1 to BR 4 are placed on the ceiling of the cassette holder 7 and the brushes BR ₁ to BR ₄ are placed on the second slide plate 31.
It is also possible to provide conductor patterns P ₁ and P ₂ on the top surface.

(Cassette loading operation) Next, the cassette loading operation will be explained.

In Fig. 4a, the cassette 2 is removed by manual operation.
is inserted into the cassette holder 7 from the direction of arrow C, and the tip of the cassette 2 is held between the leaf spring 34 and the cassette receiving part 35. Then, when cassette 2 is further pushed in the direction of arrow A by manual operation,
The second slide plate 31 has a long groove 3 that is slidably engaged with a pin 32 set on the cassette holder 7.
3, the rack 29 fixed to the second slide plate 31 also moves in the direction of arrow A. Rack 29
As the gear 59 is moved in the direction of arrow A, the gear 59 meshing with the rack 29 rotates counterclockwise, and thereby the cylindrical portion 65 also rotates counterclockwise. Since this direction of rotation is the direction in which the coil spring 62 slips with respect to the cylindrical portion 65, the rotation of the gear 59 and the cylindrical portion 65 is not transmitted to the gear 64. With the cassette 2 held between the leaf spring 34 and the cassette receiving part 35, move it manually to the arrow A.
When pushed in the direction, the free end 34a of the leaf spring 34 reaches a position immediately before being pushed down by the regulating portion 36. At this position (first position), a cassette insertion detection switch (not shown) is activated, power is started to be supplied to the loading motor 19, and the loading motor 19 starts rotating, for example, in a clockwise direction.
Therefore, a clockwise rotational torque is applied to the worm gear 20, a counterclockwise rotational torque is applied to the wormwheel 21 and the gear 22, a clockwise rotational torque is applied to the gear 23, and a counterclockwise rotational torque is applied to the gear unit 24. When the gear 64 in the gear unit 24 rotates counterclockwise, rotational torque is applied to the coil spring 62 through the flange 60 and the notch 61 that rotate together with the gear 64, and the coil spring 62 is wound around the cylindrical portion 65. , the rotational torque is transmitted to the gear 59 through the cylindrical portion 65, causing the rack 29 to further move in the direction of arrow A. As a result, the second slide plate 31 is slid in the direction of arrow A along the long groove 33 that is slidably engaged with the pin 32.

The first partially toothed gear 25 and the second partially toothed gear 27 are
At the initial position, a spring and a positioning member (not shown) connect the toothless portion of the first toothless gear 25 and the gear 22,
Because the toothless portion of the second toothless gear 27 and the gear 26 are positioned to face each other (see FIG. 4a,
b) Even if the gear 22 rotates, the first partially toothed gear 25
And the second partially toothed gear 27 does not rotate. Rack 29
As the lever 57 moves in the direction of the arrow A, the lever 57 also moves in the direction of the arrow A, comes into contact with the lever 28, and is rotated clockwise as shown in FIG. This results in
A first partially toothed gear 25 coaxially connected to the lever 28
and the second partially toothed gear both rotate clockwise. First, the first partially toothed gear 25 meshes with the gear 22 rotating counterclockwise, and the first partially partially toothed gear 2
5 is rotated clockwise. As a result, the second partially toothed gear 27 is further rotated clockwise, meshing with the gear 26, rotating the gear 26 counterclockwise, moving the rack 11 in the direction of arrow A, and moving the first slide plate 10. Move in the direction of arrow A. The rotational torque of the gear 26 is applied via the rotating shaft 30 to the gear 26' that meshes with the rack 11' of the other first slide plate 10, causing the other first slide plate 10 to slide in the direction of arrow A. Then, the direct-acting cam 49 is also moved in the direction of arrow A.

Pin 12 planted on the side of cassette holder 7
The pin 17 planted on the side surface of the pad 44 is guided by the long grooves 9 and 16 and the cam grooves 13 and 18 and moves downward, thereby causing the cassette holder 7 and the pad 44' to begin a downward movement.

The second slide plate 31 is engaged and held by a pin 32 set on the cassette holder 7 and a long groove 33 provided on the second slide plate 31.
When the cassette holder 7 begins to descend, it descends, and at the same time the rack 29 also begins to descend. As the rack 29 descends, the gear unit 24 and the rack 29 are disengaged, and the second slide plate 31 is moved to the position indicated by the arrow A.
Stop sliding in the direction. The first slide plate 10 transfers the rotational torque of the loading motor 19 to the worm gear 20, the worm wheel 21, and the gear 2.
2. first partially toothed gear 25 and second partially partially toothed gear 27;
Since it continues to be applied to the rack 11 via the gear 26, it continues to move in the direction of arrow A, and the cassette holder 7
The pad 44 then lowers and stops moving when it reaches the loading position (second position).

Next, the functions of the center core pressing member 46 and the pad 4 will be explained with reference to FIGS. 3 and 6.

The rotational torque of the loading motor 19 is applied to the gear 26 via the worm gear 20, the worm wheel 21 and the gear 22, the first partially toothed gear 25, and the second partially toothed gear 27. The rotational torque of this gear 26 is applied to the gear 26' via the rotating shaft 30,
Move the rack 11' in the direction of arrow A. As a result, the direct-acting cam 49 fixed to the side surface of the other first slide plate 10 also moves in the direction of arrow A. When the pin 48 of the center core pressing member 46 that is in contact with the low-lift surface of the direct-acting cam 49 is located on the high-lift surface of the direct-acting cam 49, the center core pressing member 46
rotates in the direction of arrow D about the rotation center axis 47, and reaches the position shown by the two-dot chain line to the position shown by the solid line, and the tip 46' of the center core pressing member 46 applies a pressing force to the center core 3, and the seat rotation motor The center core 3 is press-fitted into the spindle 53 of 54. When the first slide plate 10 further moves in the direction of the arrow A, the pin 48 is located on the low lift surface of the direct drive cam 49, thereby causing the center core pressing member 46
rotates in the direction of arrow E and returns to the position shown by the two-dot chain line.

When the cassette holder 7 is lowered, the pad 44 is guided by the guide shaft 45 as the first slide plate 10 slides in the A direction, and is lowered from the position shown by the two-dot chain line to the position shown by the solid line. In this way, the pad 44 closely opposes the upper surface of the magnetic sheet 1, making good contact between the magnetic sheet 1 and the magnetic head 56. When the first slide plate 10 reaches the end point of its sliding movement in the direction of arrow A, a cassette loading completion detection switch (not shown) is activated and the rotation of the loading motor 19 is stopped. Thereafter, the sheet rotation motor 54 is rotated to rotate the magnetic sheet 1, and the magnetic head 56 performs recording or reproduction on the magnetic sheet 1.

During recording and reproduction, the magnetic head 56 is moved continuously or intermittently in the radial direction of the magnetic sheet 1 by a head moving table 56' as shown by arrows F and G in FIG.

(Cassette ejection operation) Next, the cassette ejecting operation will be explained.

When an unillustrated eject key or the like is operated, the rotation of the sheet rotation motor 54 is stopped, and an unillustrated eject switch is operated, and the loading motor 19 is rotated in the opposite direction to that when loading a cassette, for example, counterclockwise. . Loading motor 1
When 9 rotates counterclockwise, the worm gear 20
also rotates counterclockwise. As the gear 22 rotates clockwise, the gear 23, the first partially toothed gear 25, and the second partially partially toothed gear 27 rotate counterclockwise.
As the gear 23 rotates counterclockwise, the gear unit 24 rotates clockwise. Further, the counterclockwise rotation of the second partially toothed gear 27 is caused by the gear 26
, and the gear 26 is rotated clockwise.
Due to the clockwise rotation of the gear 26, the rack 11 starts moving in the direction of arrow B, and the first slide plate 10
similarly starts sliding in the direction of arrow B.

As a result, the center core pressing member 46
As the linear cam 49 moves in the direction of arrow B, the pin 48 moves from the low lift surface to the high lift surface of the linear cam 49, so it rotates in the direction of arrow D from the position shown by the two-dot chain line and moves to the solid line. When the pin 48 reaches the position shown by , and continues to move in the direction of arrow B, the pin 48 is located on the low lift surface of the linear cam 49 and returns to the position shown by the two-dot chain line.
The pin 14 set on the side of the cassette holder 7 and the pin 17 set on the side of the pad 44 are connected to the long grooves 9 and 16 provided on the side plate 8, and the cam groove 13 provided on the first slide plate 10. and 18, the cassette holder 7 and pad 44 are raised.

In this way, by sliding the first slide plate 10 in the direction of arrow B, the center core pressing member 46 returns to the initial position, and then the cassette holder 7 rises and returns to the initial position, and the pad 44
When the gear 26 is rotated clockwise and the second toothless gear 27 is rotated counterclockwise, the gear 26 rotates clockwise and the second toothless gear 27 rotates counterclockwise. The transmission of the driving torque to the gear 26 is interrupted, and the first sliding plate 10 therefore stops its sliding operation.

On the other hand, as the cassette holder 7 rises, the second slide plate 31 also rises, and the rack 29 meshes with the gear 59 of the gear unit 24 again. Since the gear 59 is rotating clockwise in the opposite direction to the lowering operation of the cassette holder 7, the rack 29 is moved in the direction of arrow B. To explain this, the gear 64 is rotated clockwise by the rotational torque of the loading motor 19 via the gear 23, which causes the coil spring 62 to rotate in its unwinding direction. is rotated, and thus the gear 59 is rotated, so that the rack 29
is moved in the direction of arrow B.

As described above, the second partially toothed gear 27 and the gear 2
6 is released, the first partially toothed gear 25 is still engaged with the gear 22, so the clockwise rotating gear 22 causes the first partially partially toothed gear 25 and the second partially partially toothed gear to be connected. Both the toothed gear 27 and the lever 28 are rotated counterclockwise, and the toothless portion of the first toothless gear 25 faces the gear 22, whereby the meshing between the first toothless gear 25 and the gear 22 is released. is,
Transmission of the driving force to the first partially toothed gear 25 is interrupted. Then, the first partially toothed gear 25, second partially toothed gear 27, and lever 28 are returned to the initial positions shown in FIGS. 4a and 4b by means of a spring and a positioning member (not shown).

Now, the rack 29 is the loading motor 19.
is still rotating, so gear unit 2
4, the second slide plate 31 also slides in the direction of arrow B, and the leaf spring 34 and cassette receiving part 35 move from the position shown in FIG. 5 to the position shown in FIG. 4a. However, at a position where the cassette 2 fully protrudes from the exterior of the recording or reproducing apparatus (not shown), a cassette ejection completion detection switch (not shown) is activated, thereby cutting off the power supply to the loading motor 19 and removing the cassette 2. ends the ejection operation.

(Effects) As explained above, according to the record carrier storage container loading/unloading device of the present invention, a recording or reproducing device for loading a record carrier storage container containing a record carrier from a detachable loading/unloading position to a predetermined recording or reproducing position. In the playback device, a holder for transporting a record carrier storage container is driven by a motor, and driving force can be transmitted from the motor side to the holder moving mechanism side, and from the holder moving mechanism side to the motor side. Equipped with a one-way drive transmission means that prevents the transmission of driving force, the holder motor enables smooth automatic loading and unloading operations, and also facilitates manual operation when inserting the record carrier storage container into the holder. The effects are great, such as being able to reduce the required force.

[Brief explanation of the drawing]

FIG. 1 is a side view of a cassette and a cassette holder, and FIG. 2 is a perspective view of an embodiment of the record carrier container loading and unloading device of the present invention. Top view, Figure 4a
Figure b is a side view of the gear mechanism of the cassette during insertion.
5 is a side view of the second partially toothed gear and part of the gear train when inserted, FIG. 5 is a side view of the inserted cassette and the gear mechanism during driving, and FIG. 6 is the initial position and loading position. FIG. 7 is a perspective view of a specific example of a gear unit, FIG. 8 is a control circuit diagram for a loading motor that loads and discharges a cassette, and FIG. 9 is a sectional view of a center core pressing member and a pad. A configuration layout diagram of an insertion detection switch and a cassette ejection completion detection switch is shown. In the figure, 7 is a cassette holder, 8 is a side plate, 9 is a long groove provided in the side plate, 10 is a first slide plate,
11 is a rack, 12 is a pin planted on the side of the cassette holder 7, 13 and 18 are cam grooves provided in the first slide plate 10, 19 is a loading motor, 20 is a worm gear, 21 is a worm wheel, 22, 23 and 26 are gears, 24 is a gear unit, 25 is a first partially toothed gear, 27 is a second partially toothed gear, 28 is a lever, 29 is a rack, 31 is a second slide plate, and 32 is a cassette holder. 7 is an erected pin, 33 is a groove provided in the second slide plate, 34 and 35 are leaf spring and cassette receiving members, 3
6 is a position regulating part provided on the cassette holder 7;
44 is a pad, 46 is a center core pressing member, 48
is a pin, 49 is a direct-acting cam, 59 and 64 are gears, 6
0 is a flange, 61 is a notch, 63 is a bent portion, 65 is a cylindrical portion, and 62 is a coil spring.

Claims (1)

[Scope of Claims] 1. In a recording or reproducing apparatus in which a record carrier storage container containing a record carrier is loaded from a removable attachment/detachment position to a predetermined recording or playback position, the record carrier storage container inserted at the attachment/detachment position. a holder that holds a container and is movable from the attachment/detachment position to the recording or reproduction position or vice versa; a holder moving mechanism that moves the holder between the attachment/detachment position and the recording or reproduction position; a drive source for driving the holder moving mechanism; a first gear coupled to the drive source; a second gear coupled to the holder moving mechanism and rotating coaxially with the first gear; Wrapped around the shaft between the first and second gears, the coupling state between the first gear and the second gear is controlled according to the direction of rotation transmission between the first and second gears. and a coil spring, and when transmitting rotational force from the first gear to the second gear, the coil spring is displaced in the tightening direction with respect to the shaft part and When the coupling force of the gears is strengthened and rotational force is transmitted from the second gear to the first gear, the first gear and the second gear are displaced in the direction of spreading with respect to the shaft part. A record carrier storage container loading/unloading device comprising: unidirectional drive transmission means that operates to weaken the coupling force between the recording carrier storage containers.