JP2584243B2 - Front loading device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a front loading apparatus in which a front door of a tape input port is opened forward when a tape cassette is inserted or removed. .

(Prior Art) The front door of this type of conventional front loading apparatus is only opened by rotating inside the tape cassette slot, and the front door that is opened forward is not implemented.

(Problems to be Solved) There is a device in which the front door is turned inward by 90 °, the front surface of the front door faces upward, and this surface is used as a guide surface when inserting and removing the cassette. In this case, the front door is used. There is a problem that the cassette is slid on the front surface of the front panel and the surface is damaged, and the front panel is closed when the front door is closed.

Furthermore, to reduce the size of the magnetic recording / reproducing device and to diversify the design, an operation circuit is built in the thickness of the front door, and an operation switch is provided on the front of the front door to use the front door as an operation panel. However, in the case of the conventional front door that opens inward, the tape cassette moves on the operation switch, which is not possible.

A mechanism to open the front door to the front is possible,
Conventionally, the loading operation and the opening and closing of the front door are linked, and if the front door is closed in a state where the power is cut off due to a power failure, disconnection of the outlet, etc., the front door or the loading device will be overloaded and damaged. There was a problem.

The present invention discloses a front loading device which constitutes a mechanism for opening the front door to the front, and can close the front door manually and automatically lock the closed state even when power is cut off.

(Means for Solving the Problems) The front loading device of the present invention is a front loading device in which a front door (6) opens forward when a cassette is inserted / removed, and the front door is biased by a spring in a closing direction. Door (6) and an auxiliary lever (4) on the front door (6)
Lever device (20), which is connected to the cassette holder (5) and drives the loading and unloading of the cassette holder (5)
The lever device (20) comprises a first lever (2) for driving the cassette holder (5) and a second lever (3) operated by a cam (23) formed on the first lever. The auxiliary lever (4) is rotatable on the second lever (3) independently of the rotation of the second lever (3).
Is pivoted, and the auxiliary lever (4) is rotatable in a direction allowing rotation of the front door (6) in the closing direction even when the lever device (20) is stopped. The front door (6) is urged by a spring (43) stronger than the spring (63) urged in the closing direction to open the second door.
The rotation is restricted by hitting a stopper (33) on the lever (3), and the cam (23) presses the second lever (3) in the door opening direction when the first lever (2) rotates in the unloading direction. It has a mountain surface (24) and engages with the auxiliary lever (4) and the front door (6) so that they can be disengaged from each other when the unloading of the lever device (20) is completed. A protruding shaft (65) and a receiving portion (9) capable of holding the closed state of the shaft are formed.

(Operation) When the magnetic recording / reproducing device is energized, the front door (6) automatically opens and closes according to the cassette loading and cassette unloading operations by the lever device (20) connected to the cassette holder (5). I do.

Next, the operation of the loading device when the front door (6) is manually closed in a state where the power supply to the magnetic recording / reproducing device is cut off will be described.

When the front door (6) is rotated in the closing direction (counterclockwise in the drawing) from the state where the front door (6) in FIG. 1 is open, the protruding shaft (65) of the front door (6) is rotated. Pushes the auxiliary lever (4), and a force acts to rotate the auxiliary lever (4) and the lever device (20) clockwise.

Since the lever device (20) does not operate in a state where the power is cut off, the auxiliary lever (4) rotates clockwise about the pivot (40) on the lever device (20) (FIG. 4).

Since the auxiliary lever (4) is only urged counterclockwise on the lever device (20) by the spring (43) relative to the lever device (20), the lever device (2)
The front door (6) can be closed without forcing the 0).

When the front door (6) is closed, the protruding shaft (65) of the front door (6) engages with the receiving portion (9) on the auxiliary lever (4) and the front door (6). Is kept closed.

As shown in FIG. 4, when the power is supplied from the state in which the front door (6) is closed manually, the lever device (20) operates in the loading direction, whereby the front door (6) and the receiving portion (9) are operated. ) Is disengaged.

Next, by performing the unloading operation,
As shown in FIG. 1, the front door (6) is opened and the cassette (7) can be inserted.

(Effects unique to the present invention) Since the front door (6) can be opened to the front, the inner surface (62) of the front door can be used as a loading guide surface for the tape cassette (7), and the surface is damaged. However, if you close the front door, you will not be able to see it from outside.

In addition, since the front surface of the front door (6) does not come into contact with the tape cassette (7), an operation switch may be provided on the front surface of the front door, and the operation circuit may be built in the thickness of the front door (6). This can contribute to downsizing of the magnetic recording / reproducing apparatus.

(Embodiment) FIG. 1 shows a state in which the front door (6) of the loading device is open, and FIG. 2 shows a state in which the loading is being performed. When the cassette holder (5) is empty, the apparatus stands by in this state. FIG. 3 shows a state in which loading is completed, and FIG. 4 shows a state in which the front door (6) is manually closed from the first state.

In FIGS. 1 to 4, the oblique line on the first lever (2) is not a line representing a cross section, and the first lever (2) is described later.
Shows the shape of the cam (23) formed on the back side of
The oblique lines on the second lever (3) are provided for easy understanding of the shape of the second lever (3).

As shown in FIG. 1, a cassette slot (11) is opened above the front panel (1) of the magnetic recording / reproducing apparatus, and a front door (6) is attached to the slot (11) so as to be pivotable downward and forward. And is urged in the closing direction by the first spring (63).

As shown in FIG. 6, the front door (6) has end plates (60) projecting from both ends, and the end plate (60) has an upper edge (11) of the input port (11) of the front panel (1). It has a contact surface (61) for restricting the opening angle of the front door to 90 ° in (10) and an arc-shaped pressing portion (66) for pressing the cassette holder (5) inward as described later.

Further, the end plate (60) is provided with a protruding shaft (65) that engages with the rotation support shaft (64) of the front door (6) and the auxiliary lever (4) described later to open and close the front door (6). Have been.

A loading device is provided inside the front panel (1). The loading device has a pair of side plates (13) protruding on both sides of a chassis (12), and a cassette holder (5) is provided between the side plates (13). Then, shafts (51) and (52) protruding from the cassette holder (5) are slidably fitted into the substantially L-shaped guide slots (14) and (14), two of which are formed on each side plate (13). ing.

The cassette holder (5) retreats substantially horizontally along the guide slots (14), (14), and moves in the downward direction at the bent portions of the slots.

The cassette holder (5) is urged toward the front door (6) by a third spring (not shown), and when the cassette holder (5) is located on the front door (6) side, the cassette holder (5). Has the same height as the inner surface (62) of the open front door (6).

A lever device (20) including a first lever (2) and a second lever (3) is provided at a lower portion of a substantially central portion of both side plates (13).

A sector gear (22) is formed on the first lever (2) concentrically with the center of rotation of the lever (2), and the gear (22) is connected to a drive gear (35) via an intermediate gear (30). ing.

A gear shaft (36) of the drive gear (35) is connected to a loading motor (neither is shown) via a transmission means. The loading motor stops automatically when overloaded.

The tip of the first lever (2) and the shaft (51) on the front door (6) side of the cassette holder (5) are pivotally connected by a link plate (27).

A second lever (3) is pivotally supported on a pivot (34) of one of the intermediate gears (30) so as to rotate freely regardless of the rotation of the gear.
The pivot (34) extends through the middle of the second lever (3). An auxiliary lever (4) is pivotally supported by a pivot (40) at one end of the second lever on the front door (6) side so as to be rotatable in a vertical plane.

As shown in FIGS. 7 and 8, the auxiliary lever (4) is
The auxiliary lever (4) and the second lever (3) rotate integrally with each other while being constantly urged in the counterclockwise direction by the spring (43) and hitting the stopper (33) provided on the second lever (3).

A guide groove (41) is formed in the auxiliary lever (4), and the protruding shaft (65) of the front door (6) is slidably fitted in the guide groove (41).

The guide groove (41) is open at the tip of the auxiliary lever (4), and a receiving portion (9) is formed at the open end so as to be able to engage with the protruding shaft (65) of the closed front door (6). ing.

When the auxiliary lever (4) and the second lever (3) rotate clockwise as a unit, a downward force acts on the protruding shaft (65) while being guided by the groove (41), and the front door (6) closes.

The other end of the second lever (3) has a first contact portion (31) and a second contact portion (32) which engage with the cam (23) of the first lever (2).
Are formed.

The cam (23) has a pressing mountain surface (24) for pressing the first contact portion (31), and a relief valley surface (25) for releasing the first contact portion (31).
And a hook (26) that engages with the second contact portion (32) to prevent the first lever (2) from rotating counterclockwise.

As shown in FIG. 1, the first contact portion (31) of the second lever (3)
Is in contact with the pressing mountain surface (24) of the cam (23),
The second lever (3) is prevented from rotating clockwise, and the auxiliary lever (4) on the second lever (3) opposes the first spring (63) that biases the front door (6) in the closing direction. Then, the protruding shaft (65) of the front door (6) is lifted upward to keep the front door (6) open.

As shown in FIG. 2, the first lever (2) rotates in the counterclockwise direction, and the pressing mountain surface (24) of the first lever (2) comes off the first contact portion (31) of the second lever (3). When the front door (6) is closed by the first spring (63), the auxiliary lever (4) and the second lever (3) engaged with the protruding shaft (65) of the front door (6) are turned clockwise. And the first contact portion (31) of the second lever (3) corresponds to the relief valley surface (25) of the cam (23), and the second contact portion (32) of the second lever (3).
Engages with the hook (26) of the cam (23).

A sensor (not shown) for detecting the presence or absence of the cassette (7) on the cassette holder (5) is provided inside the front panel (1).
A loading start switch (81) is provided on one of a pair of side plates (13) that support the switch.

The start switch (81) is operated by a projection (28) on a link plate (27) that pivotally connects the first lever (2) and the cassette holder (5).

Next, loading and unloading when the magnetic recording / reproducing apparatus is normally energized will be described.

Loading Operation As shown in FIG. 2, when the front door (6) is closed and the cassette holder (5) is in the standby position, when the external switch for loading (not shown) is operated, the loading motor rotates. Drive gear (35), intermediate gear (3
0), the first lever (2) rotates clockwise, and pushes the cassette holder (5) toward the front door (6) through the link plate (27).

When the first lever (2) rotates clockwise, as shown in FIG. 1, the pressing mountain surface (24) of the cam (23) of the first lever (2) comes into contact with the first lever (2) of the second lever (3). Pressing the part (31) rotates the second lever (3) counterclockwise.

The auxiliary lever (4) on the second lever (3) also rotates counterclockwise integrally with the second lever (3), and lifts the protruding shaft (65) of the front door (6) to raise the front door (6). open.

The start switch (81) is turned off by the protruding piece (28) on the link plate (27) connecting the auxiliary lever (4) and the cassette holder (5), and the loading motor stops (FIG. 1).

Next, the cassette (7) is loaded by sliding the inner surface (62) of the front door (6), and the cassette (7) is placed on the cassette holder (5) which stands by at the same height as the inner surface.

When the loading of the cassette (7) is detected by a sensor (not shown), the loading motor rotates in the opposite direction to the above, the first lever (2) rotates in the counterclockwise direction, and the cassette holder (5) In the loading direction.

When the first lever (2) rotates in the counterclockwise direction, the pressing mountain surface (24) of the cam (23) of the first lever (2) moves from the first contact portion (31) of the second lever (3). Because
Although the front door (6) is about to be closed by the biasing force of the first spring (63), the front door (6) is not closed because the cassette (7) is on the front door (6).

When the cassette (7) comes off the front door (6) and completely enters the slot (11), the front door (6) is closed by the first spring (63).

The second lever (3) is rotated clockwise by the protruding shaft (65) of the front door (6). At this time, the first lever (2) has the hook (26) of the cam (23) in the second position. The lever (3) has been rotated to a position where it does not engage with the second contact portion (32), and the first lever (2) is rotated counterclockwise without hindrance to the loading completed position as shown in FIG. The cassette holder (5) and the cassette (7) can be moved.

When the loading is completed, the motor is automatically stopped by a loading completion detection switch provided at an appropriate position or a load acting on the loading motor at the loading completed position.

Unloading operation First lever (2) from the loading completed state in FIG.
Rotates clockwise, and the cassette holder (5) moves in the unloading direction.

The second lever (3) is rotated counterclockwise by the cam (23) of the first lever (2), and the auxiliary lever (4) on the second lever (3) is also rotated counterclockwise, so that the front door Lift the protruding shaft (65) of (6) and open the front door (6) against the first spring (63).

This is because the second spring (43) biasing the auxiliary lever (4) counterclockwise relative to the second lever (3) biases the front door (6) in the closing direction. Because it is stronger than (63), the auxiliary lever (4) rotates counterclockwise integrally with the second lever (3) against the first spring (63).

As shown in FIG. 1, when the unloading is completed and the cassette (7) is taken out, the state in which the front door (6) is opened for a predetermined time by the timer is maintained, during which the next cassette (7) is inserted. If not, the loading motor rotates, the first lever (2) rotates counterclockwise, and the pressing mountain surface (24) of the lever (2) is moved to the first contact portion (31) of the second lever (3). And the clockwise rotation of the second lever (3) is allowed.

The front door (6) is closed by the urging force of the first spring (63). When the front door (6) is closed, the auxiliary lever (4) engaged with the protruding shaft (65) of the front door (6) receives a clockwise force, and the auxiliary lever (4) is connected to the second lever (3). The first lever (2) is rotated clockwise as a whole, and the second contact portion (32) of the second lever (3) is engaged with the engaging portion (26) of the first lever (2). Is stopped, an overload acts on the loading motor, and the loading motor stops.

The above state is the standby state of the cassette holder (5) described first. Since the loading device can be stopped at the intermediate position until the loading completion state shown in FIG. 3 is reached, the operation time of the loading device for loading the next cassette can be shortened.

When the cassette (7) is inserted while the front door (6) in FIG. 1 is open, the cassette (7) is carried to the loading completion position as described above.

Next, when the magnetic recording / reproducing device is energized and when energization is cut off, the front door (6) is manually operated.
The operation of the loading device when closing is described.

At the time of energization When the front door (6) is rotated in the closing direction (counterclockwise in the drawing) from the state where the front door (6) in FIG. 1 is open, the pressing portion (66) of the front door (6) Presses the shaft (51) on the front door (6) side of the tape cassette (7) to retreat the cassette.

As a result, the link plate (27) connecting the cassette (7) and the first lever (2) is also retracted, the loading start switch (81) is turned on, and the normal loading operation is performed. The holder (5), the first and second levers (2) and (3), and the auxiliary lever (4) stop at the standby position shown in FIG.

When power is not supplied When the front door (6) is rotated in the closing direction from the open state of the front door (6) in FIG.
A clockwise rotation force is applied to the auxiliary lever (4) and the second lever (3) by the protruding shaft (65).

The second lever (3) abuts on the pressing surface (24) of the cam (23) of the first lever (2) and is prevented from rotating clockwise, and only the auxiliary lever (4) is placed on the second lever (3). Rotate clockwise.

Since the auxiliary lever (4) is merely urged counterclockwise on the second lever (3) by the second spring (43), the second lever (3) ), The auxiliary lever (4) rotates clockwise, and there is no problem in closing the front door (6).
Figure).

When the front door (6) is closed, the protruding shaft (65) of the front door (6) engages with the receiving portion (9) formed on the auxiliary lever (4) to close the front door. (6) and the auxiliary lever (4) are in tension, and the closed state of the front door (6) is maintained.

When the external switch is operated by manually closing the front door (6) as shown in FIG. 4, the loading motor operates, and the first lever (2) rotates in the loading direction. The second lever (3) is rotated clockwise. As a result, the protruding shaft (65) of the front door (6) is disengaged from the receiving portion (9) of the auxiliary lever (4) and fitted into the guide groove (41), whereby the locked state of the front door (6) in the closed state is released. .

The first lever (2), the second lever (3), and the auxiliary lever (4) stop in the standby state shown in FIG.

The receiving portion (9) for locking the front door (6) is not limited to being formed on the auxiliary lever (4) as described above, and is formed on, for example, the end plate (60) of the front door (6). The front shaft (51) of the cassette holder may be engaged with the notch (67).

The present invention is not limited to the configuration of the above embodiment,
It goes without saying that various modifications are possible within the scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a side view of a loading device in an eject state,
FIG. 2 is a side view of the loading device with the front door closed, FIG. 3 is a cross-sectional view of the loading device with the loading completed, and FIG. 4 is a diagram of the loading device with the front door closed manually when power is cut off. FIG. 5 is a plan view of the loading device, FIG. 6 is a perspective view of the front door, FIG. 7 is a side view showing a state where the second lever and the auxiliary lever are mounted, and FIG. 8 is a plan view of the same. is there. (2) ... first lever, (20) ... lever device (3) ... second lever, (4) ... auxiliary lever (5) ... cassette holder, (6) ... front door

Claims (2)

(57) [Claims] 1. A front loading device in which a front door (6) is opened to a front side when a cassette is inserted / removed, the front door (6) being spring-biased in a closing direction, and a front door (6). A lever device (20) that is connected and arranged via an auxiliary lever (4) and drives loading and unloading of the cassette holder (5). The lever device (20) is a first device that drives the cassette holder (5).
It comprises a lever (2) and a second lever (3) operated by a cam (23) formed on the first lever. The rotation of the second lever (3) on the second lever (3) The auxiliary lever (4) is pivotally supported so that it can rotate independently, and the auxiliary lever (4) rotates in a direction that allows the front door (6) to rotate in the closing direction even when the lever device (20) is stopped. The stopper on the second lever (3) which is urged in the opening direction of the front door (6) by a spring (43) which is possible and is stronger than the spring (63) which urges the front door (6) in the closing direction. The rotation of the cam (23) is restricted by the contact (33), and the cam (23) drives the second lever (3) in the door opening direction when the first lever (2) rotates in the unloading direction.
4), the auxiliary lever (4) and the front door (6) are disengageably engaged with each other when the lever device (20) has been completely unloaded, and the front door (6) is closed. A front loading device in which a protruding shaft (65) and a receiving portion (9) that can be held at the same are formed. 2. A front loading device in which a front door (6) is opened forward when a cassette is inserted / removed, wherein the front door (6) is spring-biased in a closing direction, and the front door (6) is connected to the front loading device. A lever device (20) that is connected and arranged via an auxiliary lever (4) and drives loading and unloading of the cassette holder (5). The lever device (20) is a first device that drives the cassette holder (5).
It comprises a lever (2) and a second lever (3) operated by a cam (23) formed on the first lever. The rotation of the second lever (3) on the second lever (3) The auxiliary lever (4) is pivotally supported so that it can rotate independently, and the auxiliary lever (4) rotates in a direction that allows the front door (6) to rotate in the closing direction even when the lever device (20) is stopped. A stopper on the second lever (3) which is capable of being biased in a direction to open the front door (6) by a spring (43) stronger than a spring (63) which biases the front door (6) in the closing direction. The rotation of the cam (23) is restricted by the contact (33), and the cam (23) drives the second lever (3) in the door opening direction when the first lever (2) rotates in the unloading direction.
4), the front door (6) and the cassette holder (5) are detachably engaged with each other when the cassette holder (5) has been completely unloaded, and the front door (6) is closed. A front loading device in which a notch (67) and a shaft (51) that can be held in a hole are formed.