JPH10177752A - Recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording/reproducing device employing a so-called front loading system capable of performing cassette loading/unloading from its front face by an electric motor even with a recording/reproducing mechanism adapted to move a reel base having the cassette pressure-fixed to a head drum side. SOLUTION: This device comprises a front loading operation for pulling-in a cassette holder 20 together with driving sliders 5 and 6 from its unloading position, an operation for vertically moving the cassette holder 20 by the inclined guide grooves 23a, 23b, 24a and 24b of the driving sliders 5 and 6 and guide blocks 33 and 34 provided in a movable chassis 26 and then press-contacting the same with reel bases 27a and 27b, and a linear skating operation for moving the cassette holder 20 together with the movable chassis 26 to a head drum side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called front-loading cassette compartment (hereinafter referred to as a cassette) in which a cassette can be inserted from a cassette insertion slot on the front of a front panel. The present invention relates to a recording / reproducing apparatus having a cassette loading mechanism that can be applied to a so-called linear skate type mechanism in which an operation of bringing a reel base closer to the mechanism is performed without major mechanical changes.

[0002]

2. Description of the Related Art Conventionally, a cassette loading apparatus of a front loading type, in which a tape cassette is inserted and ejected from a cassette insertion opening at the front front of a recording / reproducing apparatus of this kind, has been widely applied. However, since this cassette loading device uses a recording / reproducing mechanism developed exclusively for a front-loading type application, it does not have a reel base moving mechanism for the head drum.

On the other hand, in a recording / reproducing mechanism used for a video camera or the like that emphasizes portability, an operation of bringing the reel base position close to the head ram in order to minimize the size of the recording / reproducing mechanism in use. Some are configured to do so. In order to move the reel stand position, it is necessary to move the chassis on which the reel stand is mounted. Thus, by moving the reel base toward the head drum after pressing the cassette on the reel base, it is possible to reduce the size of the entire apparatus during the recording / reproducing operation. However, in a recording / reproducing mechanism in which the reel base can be moved, the moving mechanism becomes complicated. Therefore, it is technically difficult to provide a recording / reproducing mechanism in which the reel base is movable in the above-described front loading type cassette loading mechanism. Met.

In a recording / reproducing mechanism in which a reel base is movable, a cassette holder is pushed up by a spring force or the like to open it, and a so-called hop-up mechanism in which a cassette can be manually loaded and unloaded from the cassette holder. I had to use a cassette loading mechanism of the system. Alternatively, in the case of realizing a front loading type cassette loading mechanism in which a cassette can be inserted and ejected from the cassette insertion opening on the front front, recording / reproducing operation can be performed without moving the reel base position. It was necessary to newly develop a recording / reproducing mechanism configured and a cassette loading mechanism suitable for this.

[0005]

However, the development of a new recording / reproducing mechanism requires a very long development time and cost, and the developed recording / reproducing mechanism requires a portability. In some cases, the recording / reproducing mechanism is difficult to use and has no versatility. For this reason, it is not possible to realize a highly versatile recording / reproducing apparatus that can be used both in a case where portability is required and in a case where portability is not required, by changing a cassette loading mechanism attached to one recording / reproducing mechanism portion, One of the functions was sacrificed.

In order to realize a cassette loading mechanism of a front loading type in a recording / reproducing mechanism that emphasizes portability, the cassette is pulled down horizontally from an insertion slot and then lowered to be pressed onto a reel base. Then, an operation of bringing the reel base on which the cassette is crimped closer to the head drum is required. That is, an operation of moving the cassette in a crank shape is required. However, a cassette loading mechanism capable of performing such an operation has not been realized.

Further, in the cassette loading mechanism of the front loading type, the cassette is moved to a predetermined position by a pair of arm mechanisms connected rotatably to the left and right without using a slider mechanism arranged to the left and right. What was crimped to a reel stand was common. However, since the crimping operation of the cassette is performed by relying on the torsional strength of the shafts connected to the left and right, it is necessary to use a high level of design technology to ensure the positional accuracy or crimping phase of the cassette holder in the crimping direction. Was.

In order to perform the same operation as described above, a pair of left and right slider mechanisms having oblique grooves and L-shaped guide grooves formed in a pair of right and left frames are used to place the cassette holder on the reel base. Positioning mechanisms have been proposed. This is a mechanism for reliably guaranteeing the right and left crimping positions of the cassette, so that a reaction force at the time of cassette crimping is not applied to the axis that determines the phase of the sliders connected to the left and right. However, if the cassette holder is moved to the head drum side together with the reel base after the cassette holder is positioned on the reel base, a mechanism for horizontally moving the slider together or moving only the cassette holder horizontally is required. However, a mechanism capable of performing such a movement has not been realized.

Also, the cassette is pressure-bonded onto the reel base via a cassette holder, and the positional accuracy of the cassette after being crimped is determined by the precision of the components and the assembly position of the cassette holder and the chassis of the reel base to be pressed. It could be lower. For example, when the crimping position of the cassette is shifted upward, the crimping force cannot be secured sufficiently and the cassette is lifted up, making it difficult to run the tape. The power became too strong, and the chassis part was deformed, which could adversely affect the tape running.

That is, if such a mechanism is applied to a recording / reproducing mechanism in which a reel base moves as it is, the mechanism becomes more complicated than a general cassette loading mechanism, so that the pressure bonding position of the cassette is further lowered, and the above-described cassette lifting and chassis Not only is the possibility of further deformation increasing, but also the reliability of horizontal movement of the chassis is likely to be reduced.

In the above-described mechanism for positioning the cassette holder on the reel base by the pair of sliders having the left and right oblique guide grooves and the L-shaped guide groove, the slider having the oblique guide grooves moves. The arrangement and the depth of the slider will determine the size of the entire cassette loading mechanism. Therefore, when trying to limit the size of the recording / reproducing device to some extent, the size of the slider is limited, and the guide groove formed in the slider is limited. For this reason,
Since the inclination angle of the guide groove is limited, the loss between the slider and the cassette holder is difficult to reduce.

Further, after the cassette holder is press-fitted to a predetermined position on the reel base by the cassette loading mechanism,
A mechanism has been proposed in which a cassette holder is forcibly and precisely held by a separately provided lock mechanism.
However, this is implemented only in a so-called hop-up type cassette loading mechanism in which the cassette holder is pushed up and opened using a spring force at the time of insertion and ejection of the cassette, and the cassette is manually inserted and removed. There has not been proposed any apparatus having a front loading type mechanism for electrically inserting and discharging a cassette.

Furthermore, if a mechanism for forcibly and accurately holding the cassette holder by the lock mechanism is to be configured on a front loading type cassette loading mechanism, the lock mechanism and the portion configured as the guide wall of the cassette exist in the same place. Therefore, it was difficult to satisfy both arrangements.

In a cassette loading mechanism using a slider, when a cassette is inserted into the cassette holder and the cassette is forcibly pushed with a strong force, the cassette holder is also pushed in at the same time. As a result,
The internal components may be subject to impact forces, so either increase the component strength to avoid damage to the components, or use a spring-based limiter mechanism, but the mechanism is complicated. Problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is an object of the present invention to provide a recording / reproducing mechanism in which a reel base moves to a head drum side after a cassette is pressure-bonded to the reel base. It is another object of the present invention to provide a recording / reproducing apparatus adopting a so-called front loading system in which cassette insertion and ejection operations can be performed electrically from the front of the front.

[0016]

In order to achieve the above-mentioned object, a recording / reproducing apparatus according to the present invention comprises a first operation for retracting a cassette holder together with a driving slider from an ejection position, and a first operation for the cassette holder. A second operation in which is pressed onto a reel base on the movable chassis;
And the third operation in which the cassette holder moves to the head drum side together with the movable chassis after the operation.

With this configuration, a so-called front loading operation for inserting and ejecting the cassette from the front of the apparatus and a so-called linear skate operation for moving the cassette to the head drum side can be provided in combination. Thus, the present invention can be applied to a cassette loading mechanism such as a video camera without requiring a large change.

The second operation of the cassette holder is as follows.
An operation in which the guide pin of the cassette holder is guided by the inclined guide groove formed in the drive slider and moves relatively,
The operation is performed by an operation in which a shaft pin of a cassette holder moves while being guided by a guide wall of a guide block provided on a movable chassis. This makes it possible to smoothly and reliably perform the pressing and positioning operation of the cassette holder onto the reel base.

The inclined guide groove of the drive slider is
The inclination angle is set to be different from each other, and the guide wall of the guide block is inclined. As a result, it is possible to reduce the load of pressing the cassette holder against the reel base.

Further, when the cassette holder starts the third operation, the guide holder holds the cassette holder at the crimping position. This prevents the cassette holder from being lifted during the third operation of the cassette holder. That is, the cassette can be accurately moved to the head drum side in a predetermined press-fit state on the reel base.

Further, it has a first drive motor for performing the first operation and the second operation, and a second drive motor for performing the third operation.
When the first drive motor performing the above operation is started, the first drive motor is disconnected from the transmission system of the first drive motor. Thus, the load on the second drive motor in the third operation can be reduced, and the size of the second motor can be reduced.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a recording / reproducing apparatus according to the present invention is applied to a cassette loading apparatus (hereinafter referred to as a cassette) of a video camera apparatus will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a main part of the cassette player, wherein the whole cassette is indicated by reference numeral 1 and the direction of the arrow is the direction of insertion of the tape cassette. Further, the cassette insertion side of the cassette 1 is referred to as a front side, and the opposite side is referred to as a back side.

First, the basic configuration of the cassette 1 will be described. The outer frame of the cassette 1 is a bottom frame 2 and a pair of left and right side frames 3 erected on both sides thereof.
4. The side frames 3, 4 are supported by hooks 3a, 4a provided on the front bottom portion thereof, which are engaged with the holes 2a, 2a of the bottom frame 2, and the rear ends of the side frames 3, 4 are connected to the bottom frame. 2 is fixed by screws (not shown).

A pair of left and right drive sliders 5 and 6 are arranged inside the side frames 3 and 4 so as to be connected to each other by an upper frame 7. Guide pins 8a supported as
8b, 9a, 9b are engaged in parallel guide grooves 10a, 10b, 11a, 11b formed in the side frames 3, 4, and are supported so as to be movable in the front-rear direction.

As a driving mechanism for the driving sliders 5 and 6, the cascon motor 12 is mounted on one side frame 3.
Are supported, and the output gear 12a of the cassette motor 12 is
, The small gear 1 of the drive gear 15 via the reduction gears 13 and 14
The small gear 15a meshes with a rack 16 formed on the lower side of one drive slider 5.
A drive gear 17 is supported symmetrically to the drive gear 15 on the other side frame 4, and its small gear 17 a meshes with a rack 18 formed on the lower side of the other drive slider 6. The two driving gears 15 and 17 are connected to an interlocking gear 19 supported on the bottom frame 2 via an interlocking shaft 19.
a, 19b.

Therefore, the rotational torque of the cassette motor 12 drives the drive gear 17 via the reduction gears 13 and 14 and the drive gear 17 via the interlocking gears 19a and 19b, whereby the small gears 15a and 17a are rotated. With the drive sliders 5, 6 in phase with each other via racks 16, 18, the guide grooves 10a,
The moving operation can be performed along 10b, 11a, and 11b.

A cassette holder 20 is arranged inside the driving sliders 5 and 6. The cassette holder 20 has guide pins 21a, 21b, 22a, 22b supported on the front and rear sides of the side plates 21, 22, inclined guide grooves 23a, 2 formed in the drive sliders 5, 6.
3b, 24a, 24b movably supported. These inclined guide grooves 23a, 23b, 24a, 24b are parallel guide grooves that are low on the front side and high on the rear side.
The details of the inclined guide grooves 23a, 23b, 24a, 24b are shown in FIG.
4a and 24b will be described.
a and 24b are formed in two stages with different inclination angles in the middle. That is, when the angle of the high inclined guide grooves of the inner side and theta _1, somewhat loose theta ₂ of the inclined guide groove 24a of the front angle of the inclined guide grooves low angle than theta ₁ ',
24b '. The function of the inclined guide groove will be described in detail when describing the operation.

On the other hand, a main chassis 25 is fixed on the bottom frame 2, and a movable chassis 26 is supported on the main chassis 25. The movable chassis 26 has a plurality of pins 25a protruding from the main chassis 25, and long holes 26a formed in the main chassis 26 are engaged with each other, and are slidable in the front-rear direction. A pair of reel stands 27a and 27b and a cassette positioning pin 2 are mounted on the movable chassis 26.
8a, 28b and cassette height determining pins 29a, 29b
Is arranged. The movable chassis 26 is driven by a rotational transmission from a chassis motor 30 supported by the main chassis 25 by a power transmission mechanism (not shown) disposed on the back surface of the movable chassis 26.

Further, both side plates 31a of the movable chassis 26,
Guide mechanisms 32, 32 for guiding the operation of loading the cassette holder 20 onto the reel bases 27a, 27b of the movable chassis 26 are attached to the inner surface side of the base 31b. Since the guide mechanism is almost the same, the guide mechanism 32 on the side of the side plate 31b (see FIG. 1) will be described with reference to FIG. In FIG. 3, the movable chassis 26 and the side plate 31b are used.
Is omitted. The direction of the arrow is the direction in which the tape cassette is inserted.

The guide mechanism 32 comprises a first guide block 33, a second guide block 34, a cam 35 for movably operating the second guide block 34, and a bar member 36 for rotating the cam 35. ing. The first guide block 33 is fixed to a side plate 31a (not shown) and has a flat surface 33a on the upper surface on which an axial pin 37 protruding from the side surface of the cassette holder 22 is guided. The second guide block 34 is disposed at an interval behind the first guide block 33 and is rotatable about a fulcrum shaft 38. A substantially vertical guide wall 39 for guiding the above-mentioned shaft pin is formed on the front and rear wall surfaces of the first guide block 33 and the second guide block 34, and the upper portion of the guide wall 39 is slightly inclined forward. An inclined guide wall 39a is formed, and a guide portion 34a protruding from the second guide block 34 is provided above the inclined guide wall 39a.

The cam 35 is rotatable about a fulcrum shaft 40 and has a U-shaped engaging claw 41 at its lower portion. The engaging claw 41 is a convex portion of a bar member 36 fixed to the main chassis 25. 36a. That is, in the state shown in FIG. 2, the second guide block 34 has its forked end portions 34b, 3b.
4c is supported by the surface of the cam 35 and maintains this state.

Next, a series of operations of the cassette 1 will be described with reference to FIGS. FIG. 3 shows a state in which the cassette 1 is stopped at the cassette eject position. In this state, the shaft pin 37 of the cassette holder 20 is on the flat surface 33 a of the first guide block 33 of the guide mechanism 32. is there.

Thus, at the cassette eject position, the tape cassette C is completely inserted into the waiting cassette holder 20 from the cassette insertion opening (not shown),
In this state, when the cassette holder 20 is pushed in together with the tape cassette, the drive slider 5 slightly moves, and from this movement of the drive slider 5, a detection switch (not shown) operates and the cassette motor 12 starts to be driven. Case control motor 12
The drive slider 6 horizontally draws in along the guide groove of the cassette housing frame (not shown) via the rack 18 meshing with the reduction gears 13 and 14, the drive gear 15, the interlocking gears 19a and 19b, and the drive gear 17 by driving. start.

The cassette holder 20 is also retracted as the driving slider 6 is retracted. At this time, the cassette holder 22 holds the inclined guide groove 2 of the drive slider 6.
4a and 24b receive an obliquely downward force, but the shaft pin 37 of the cassette holder 20 is
On the flat surface 33a of the guide block 33, the downward movement is suppressed, and the cassette holder 20 is pulled in horizontally with the driving slider 6, whereby the shaft pin 37 of the cassette holder 20 is moved to the first guide block. 33 moves along the flat surface 33a.

After the cassette holder 20 has been moved from the flat surface 33a to the entrance of the guide groove 39 as shown in FIG. 4, the downward restraint of the cassette holder 20 is released, whereby the drive is started. In response to the retracting operation of the slider 6, the guide pins 22a and 22b of the cassette holder 20 have the inclined guide grooves 24a and 2b.
4B and the shaft pin 37 is vertically moved by the interlocking action of the movement of moving down along the guide wall 39 of the guide mechanism 32 (see FIG. 5). Here, the shaft pin 37 of the cassette holder 20 is
When moving downward, the inclined angle of the guide pin 39 can be reduced by forming the inclined guide wall 39a on the upper part of the guide wall 39, and the operation load of the drive slider can be reduced.

FIG. 6 shows a position where the drive slider 6 is retracted to the innermost side and the cassette holder 20 is completely lowered, that is, the tape cassette C loaded in the cassette holder 20 is in the reel stand 27a on the movable chassis 26 in FIG. ,
It is in a state of being pressure-bonded to 27b.

The manner in which the cassette holder 20 is positioned on the reel bases 27a and 27b with a predetermined pressing force will be described with reference to FIGS. 8A and 8B.

When the shaft pin 37 of the cassette holder starts to descend along the inclined guide groove 24a of the drive slider 6 as shown in FIG. 8A, the force for pushing down the shaft pin 37 by the inclined guide groove 24a is P1. = Fcos α-μF sin α. Also, just before pressing the cassette holder, press the shaft pin 3
Assuming that P7 is a force which is depressed by the inclined guide groove 24a 'as shown in FIG. 8B, P2 = Pcosβ-μFsinβ.

Here, when the pressure angle α> β, F and μ (= 0.
If (3) is constant, then Fcos α-μFsin α <Fcos β-μFsinβ, so that P1 <P2.

Therefore, when the horizontal force for moving the drive slider 6 is the same, the pressure force of the cassette holder is increased by the inclined guide groove 24a '. Conversely, when trying to obtain a certain required pressing force, the load for moving the drive slider in the horizontal direction can be reduced by reducing the inclination of the drive slider 6.

Thus, by reducing the pressure angle immediately before the pressure applied to the cassette holder, the load at the time of pressing the cassette, which causes the largest load, can be reduced, and the maximum load can be reduced.

The detection switch (not shown) is operated in conjunction with the operation of the drive slider 6 being pulled to the farthest side, and the cassette motor 12 is stopped.

Thus, when the lowering operation of the cassette holder 20 is completed, the detection switch (not shown) operates and the chassis motor 30 starts to be driven, and the movable chassis 26 is pulled in via the power transmission mechanism (not shown) to start the loading operation. Is done. That is, in the retracting operation of the movable chassis 26, the drive slider 6 is also retracted together with the cassette holder 20 in which the tape cassette C is loaded, and the tape cassette is linearly skated and positioned at the loading position.

At the time of the retracting operation of the movable chassis 26, the engaging piece 41 of the cam 35 supported by the movable chassis 26 is engaged with the projection 36a of the bar member 36 supported by the main chassis 25 as shown in FIG. The second guide block 34 is rotated counterclockwise around the fulcrum shaft 38 by one end 34c of the second guide block 34 being pushed by the rotation of the cam 36. . Thus, the shaft pin 37 of the cassette holder 20 is held by the step 33d formed on the first guide block 33.

The operation will be described in detail. The guide grooves 10a, 10b, 11a and 11b of the side frames 3 and 4 will be described.
Although not shown, the upper edge side of the groove on the back side is widened. That is, in the midway operation of the lowering of the cassette holder 20, the guide grooves 10a, 10b of the side frames 3, 4
Drive sliders 5 and 6 that move along 11a and 11b
At the same time, the cassette holder 20 is pushed downward, but at the position where the cassette holder 20 starts the crimping operation on the reel base, the drive sliders 5, 6 move upward when they reach the widened guide grooves of the side frames 3, 4. Rise to As a result, the cassette holder 20 is released from the crimping, and the crimping function of the holder is inherited by the stepping portion 34d of the first guide block 33 holding the shaft pin 37 of the cassette holder 20.

In this way, the cassette holder 20 is linearly skated to the head drum (not shown), which is the loading position, in a state where the cassette holder 20 is locked to the reel bases 27a and 27b and pressed.

Here, in the above-described linear skate operation, a protection mechanism is provided for preventing the cassette holder 20, particularly the front side, from floating from the reel base.

This defense mechanism will be described with reference to FIG.
A link 71 that swings around a fulcrum shaft 70 is attached to the outer surface of the drive slider 6. One end of the link 71 serves as a stopper 72 facing the lower end of the inclined guide groove 24b. A downward projection 73 is formed at the other end of the link 71, and a release piece 74 is attached to the side frame 4 (not shown) at a position corresponding to the projection 73. The link 71 is urged by a tension spring 75 to a position where the stopper 72 faces the inclined guide groove 24b. Reference numeral 76 denotes a regulating piece that regulates the rotational position of the link 71.

In the defense mechanism configured as described above, the driving slider 6 moves forward or backward and the projection 73 is released from the release piece 74.
, The link 71 rotates, and the stopper 72 can be moved in and out of the inclined guide groove 24b.

That is, the operation shown in FIG. 6 is a state immediately before the cassette holder 20 is pressed on the reel table (not shown) and operates at the loading position. At this time, the stopper 72 of the link 71 faces the inclined guide groove 24b. In. When the cassette holder 20 performs a loading operation from this state, even if the guide pin 22b of the holder 20 moves away along the inclined guide groove 24b, the guide pin 22b abuts against the stopper 72 of the link 71 and the cassette holder 20 can be prevented from rising, the horizontal posture can be maintained, and the operation to the loading position can be performed stably.

Further, from the state shown in FIG.
When the drive slider 6 retreats after the ejection operation of the cassette holder 20 is started, the protrusion 73 of the link 71 rides on the release piece 74, the stopper 72 is retracted from the inclined guide groove 24b, and the guide pin 22b of the cassette holder 20 is inclined. The passage of the groove 24b is enabled.

The operation of ejecting the tape cassette C from the loading position shown in FIG.
0 is driven in reverse to retract the cam 35 together with the movable chassis 26, so that the engaging claw 41
6a, the cam 35 rotates clockwise, and in conjunction with this, the second guide block 34 rotates clockwise to open the guide groove 39.
0 stops (position in FIG. 6).

Thereafter, the cassette control motor 12 is driven to rotate in the reverse direction, and the cassette holder 20 is guided by the inclined guide grooves 24a and 24b to vertically move upward (position in FIG. 4) in conjunction with the retreat operation of the drive slider 6, and thereafter , Drive slider 6
The cassette holder 20 returns to the eject position by the retreat operation (the position in FIG. 3), and the tape cassette C can be taken out.

By the way, the above-mentioned cassette control 1 is provided with a switching mechanism for disconnecting the chassis motor 30 so that the driving torque is not transmitted to the cassette control motor 12 and the reduction gears 13 and 14 when the chassis motor 30 is driven. This switching mechanism will be described with reference to FIG.

The reduction gear 14 has a small gear 1 which rotates integrally.
4a, and a pendulum gear 42 is arranged between the small gear 14a and the drive gear 15. This pendulum gear 4
Reference numeral 2 denotes a pendulum arm 4 which penetrates around the central axis 43 of the reduction gear 14 while being engaged with the small gear 14a.
4 is supported by the tip. On the other hand, drive slider 3
An operation arm 45 is swingably supported on a fulcrum shaft 46 as a center, and a pin 42 a provided on the pendulum gear 42 is engaged with a long hole 47 formed at the tip of the operation arm 45. . An operating piece 48 is formed at the other end of the operation arm 45. Accordingly, the pendulum gear 42 meshes with or disengages from the drive gear 15 by the swinging operation of the operation arm 45. The operation arm 45 is biased by a tension spring 49 in a direction in which the pendulum gear 42 is disengaged from the drive gear 15, but at the eject position of the cassette holder, the operation piece 48 of the operation arm 45 is transmitted to the drive transmission mechanism of the movable chassis 26. The pendulum gear 42 is pushed back by the attached movable hook piece (not shown) and meshes with the drive gear 15.

When the cassette control motor 12 is driven in the retracting operation of the cassette holder 20 from the eject position, the switching mechanism configured as described above operates when the reduction gear 13,
The operation of driving the drive slider 5 is performed by being transmitted from the drive gear 14 to the drive gear 15 via the pendulum gear 42, but the operation piece 48 of the operation arm 45 is moved immediately before the cassette holder 20 descends on the reel base and performs the linear skate operation. The operating arm 4 is released from the hook piece of the movable chassis 26.
5 rotates and the pendulum gear 42 is disengaged from the drive gear 15. Thus, when the chassis motor 30 is driven, the drive slider 5 and the drive gear 15 are rotated, and the reduction gears 13 and 14 and the cassette motor 12 are separated. Therefore, the load on the chassis motor 30 can be reduced.

Next, the structures of the cassette pushing mechanism and the tape cassette erroneous insertion preventing mechanism at the time of ejecting the cassette will be described with reference to FIGS.

A cassette pushing arm 50 is supported on the upper frame 7 of the driving sliders 5 and 6 so as to be rotatable about one side (the driving slider 5 side) around a fulcrum shaft 51. Bending piece 5 cut down and bent
0a is movable along a slit 7a formed in the upper frame 7. The distal end of the cassette pushing arm 50 extends toward the center of the cassette holder 20, and a roller 52 is supported at the distal end in a suspended state. The cassette push-out arm 50 supports both ends of the toggle spring 53 by a hook 50b formed at the tip and a hook 7b formed at the upper frame 7, and ejects the tape cassette out of the cassette insertion slot in FIG. Biased in the direction.

An operating piece 54 is supported coaxially with the fulcrum shaft 51 on the upper surface on the other end side of the cassette pushing arm 50, and an operating claw 55 is provided at the rear end of the operating piece 54. The operating piece 54 has a hook 54a at the tip thereof and a hook 50c formed on the cassette pushing arm 50.
To support the tension coil spring 56,
Is pressed against the abutting piece 50d of the cassette pushing arm 50 in a state of being biased clockwise.

The cassette pushing arm 50 is provided with a first lock mechanism for preventing erroneous insertion of the cassette. The first locking mechanism is a cassette pushing arm 50.
The arm 57 extends from the arm 57, and a lock piece 58 located at the tip of the arm 57 so as to face the front side of the above-described operation piece 54, and an abutment against which the lock piece 58 abuts on the upper side of the side frame 3. It is composed of a piece 59.

Further, a projection 60 is formed on the upper side of the side frame 3 on the rear side of the abutting piece 59, with which the operating claw 55 of the operating piece 54 comes into contact.

On the other hand, on the side opposite to the cassette pushing arm 50 and outside the side plate 22 of the cassette holder 20, a second lock mechanism for preventing incorrect insertion of the cassette is provided. The configuration of the second lock mechanism will be described with reference to FIG.

A lock arm 62 that rotates about a fulcrum shaft 61 is attached to the side plate 22.
Numeral 2 is movable in the range of the long hole 62a along the restriction pin 63. At the tip end of the lock arm 62, a hook-shaped lock piece 6 is provided.
A release lever 6 is provided at the lower end of the fulcrum shaft 61 for operating the lid lock member of the tape cassette in the release direction.
5 are provided. The lock arm 62 has a tension spring 68 attached to a spring hook 66 provided on the lock arm 62 and a spring hook 67 provided on the side plate 22.
4 is urged in the locking direction. Note that the lock piece 64 is formed by an abutment piece 69 (FIG. 1) formed on the upper side of the side frame 4.
Reference).

Next, a series of operations from insertion to ejection of the tape cassette will be described with reference to FIGS. Since the series of operations of the cassette 1 have been described with reference to FIGS. 3 to 7, the operation of the cassette pushing arm 50 will be described here.

FIG. 10 shows that the tape cassette C is inserted into the cassette holder 20 waiting at the eject position.
The front end of the tape cassette C is the cassette pushing arm 5
In this state, the cassette is in the process of being inserted into contact with the zero roller 52. When the tape cassette C is further inserted further into the cassette holder 20, the roller 53 is pushed back, and the cassette pushing arm 50 rotates counterclockwise about the fulcrum shaft 51 as shown in FIG. The tape cassette C is completely inserted therein. At this time, the lock piece 58 of the cassette pushing arm 50 is rotated to a position that does not correspond to the butting piece 59, and is in the unlocked state.

The tape cassette C is placed in the cassette holder 20.
When the cassette holder 20 is slightly pushed in together with the tape cassette in a state where the cassette is completely inserted into the inside of the cassette, the drive sliders 5 and 6 are pushed and moved. Starts. The cassette holder 20 loaded with the tape cassette C is pulled in together with the driving sliders 5 and 6 by driving the cassette motor. Drive slider 5,
In the course of the pull-in operation of 6, the tape cassette C together with the cassette holder 20 starts to descend on a reel table (not shown).

On the other hand, the operating claw 55 of the operating piece 54 of the cassette pushing arm 50 comes into contact with the projection 60 by the retracting operation of the drive slider, and the cassette pushing arm 5
The cassette pushing arm 50 is rotated about the fulcrum shaft 51 to the position shown in FIG. As the drive sliders 5 and 6 are further retracted together with the cassette holder 20, the operation piece 54 rotates about the fulcrum shaft 51 as a fulcrum and climbs over the projection 60, and the lock piece 57 is abutting piece as shown in FIG. Pass away from 58.

Thus, when the drive sliders 5 and 6 are retracted to the rear side, the cassette control motor stops, and at the same time, the tape cassette C loaded in the cassette holder 20 is pressed on the reel base. Thereafter, the chassis motor starts, and the cassette holder 20 linearly skates together with the movable chassis (not shown) to move the tape cassette C to the loading position.

Next, in the eject operation of the tape cassette, first, the chassis motor is driven to rotate in the reverse direction, and the cassette holder 20 moves backward together with the movable chassis, and the motor stops. Then, when the cassette cassette motor and the cassette slider 20 complete the upward movement of the tape cassette in conjunction with the operation of the drive sliders 5 and 6 retracting from the position shown in FIG. Is brought into contact with the protrusion 60, and the cassette pushing arm 50 is forcibly rotated clockwise about the fulcrum shaft 51. At this time, since the distance between the roller 52 and the cassette pushing arm 50 is much longer than the distance between the fulcrum shaft 51 and the operation claw 55, the movement amount of the roller 52 may be larger than the movement amount of the cassette holder 20. As a result, the front end of the tape cassette C is pushed out of the cassette holder 20 by the rollers 53. After this operation, the operating claw 55 passes through the protrusion 60.

Thereafter, the tape slider C is retracted in the ejecting direction while the tape cassette C is pushed out from the cassette holder 20 together with the retracting operation of the driving sliders 5 and 6, and the cassette motor stops at the position where the cassette holder 20 reaches the ejecting position. I do. As a result, a state similar to that in FIG. 10 in which the rear end of the tape cassette C protrudes greatly from a cassette insertion opening (not shown) is obtained, and a sufficient margin for taking out the cassette can be secured.

Next, the protection operation when the tape cassette C is normally inserted into the cassette holder 20 and when the tape cassette C is erroneously inserted will be described.

First, when the tape cassette C is properly inserted, the first lock mechanism uses the cassette pushing arm 50 at the front end of the tape cassette as shown in FIG.
When the roller 52 is pushed back, the arm 50 rotates and the lock piece 58 is retracted from the abutment piece 59, so that the cassette holder 20 can be pulled in. On the other hand, in the second lock mechanism, when the tape cassette C is normally inserted, the release lever 65 of the lock arm 62 is operated by the lid lock member of the tape cassette as shown in FIG.
Is pressed, the arm 62 rotates about the fulcrum shaft 61, the lock piece 64 is retracted from the abutment piece 69, and the cassette holder 20 can be pulled in.

For this reason, the first lock mechanism and the second lock mechanism are simultaneously released only when the tape cassette is normally inserted, and the tape cassette is pulled in together with the cassette holder 20.

On the other hand, when the tape cassette is inserted in an incorrect posture which is not normal, for example, the tape pushing arm 5 serving as the first lock mechanism is turned to the vertical position.
If the cassette holder 20 is inserted with the bias toward the zero side, the roller 52 is pushed back, the lock piece 58 is retracted from the abutment piece 59, and the retracting operation of the cassette holder 20 becomes possible. Since the release lever 65 of the lock mechanism 2 is not pushed, the lock piece 6
4 remains engaged with the butting piece 69, and the draw-in operation of the cassette holder 20 is prevented.

Further, when the tape cassette is oriented vertically, the second
When the tape cassette is biased toward the lock mechanism side, the release lever 65 of the lock arm 62 is pushed at the leading end of the tape cassette, and the lock piece 64 is retracted from the abutment piece 69. In this position, the roller 52 of the cassette pushing arm 50 cannot be pushed back. Therefore, even if the cassette is forcibly inserted and the cassette holder 20 is moved in this state, the lock piece 58 of the cassette pushing arm 50 abuts against the butting piece 59. The further movement of the cassette holder 20 is prevented. At this time, it is detected that the cassette has not been inserted normally, and the cassette control motor is reversed to move the cassette holder 20 in the discharge direction.

As described above, when the tape cassette is not inserted in a normal posture, one of the two lock mechanisms is locked, and erroneous insertion of the tape cassette can be prevented.

As another example of erroneous insertion of a tape cassette, even when the cassette is inserted in a reversed front-to-rear direction or upside down, the two lock mechanisms are not released at the same time and the erroneous insertion can be prevented. .

FIG. 16 shows a mechanism for protecting the peripheral members when the tape cassette is strongly pushed into the cassette holder 20. FIG.

According to this, the tip end of the shaft pin 37 of the cassette holder 20 is formed on the tapered surface 37a having an enlarged diameter. On the other hand, the guide portion 3 of the second guide block 34
4a has a tapered wall 34b formed on the inner surface side.

When the tape cassette is strongly pushed and inserted at the eject position of the cassette holder 20, the cassette holder 20 is also pushed and moved, and the shaft pin 37 of the cassette holder 20 abuts the guide portion 34a of the guide block 34. . In this operation,
For example, if the shaft pin 37 of the cassette holder 20 is a straight pin, or if the guide portion 34a of the guide block 34 has a flat surface, the shaft pin 37 gets over the guide portion 34a by an impact hitting the guide portion 34a. Therefore, the movable chassis 26 supporting the guide block 34 is deformed outward, and the shaft pin 37 and the guide block 3
4, and thereafter, the operation of the cassette holder becomes impossible.

Therefore, the shaft pin 37 is formed on the tapered surface 37a as described above, and the tapered wall 34 is formed on the guide portion 34a.
By forming b, the shaft pin 37 is
When the tapered surface abuts against the guide portion 34a, the action of the tapered surfaces attracting both members to each other occurs, whereby the shaft pin 37 does not come off the guide wall 34a.
Therefore, it is possible to improve the strength against strong pushing of the cassette without deforming the movable chassis 26 to the outside.

The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

In this embodiment, the operation of pulling in / out the cassette holder 20 and the operation of pressing the cassette holder 20 on the reel table are performed by the cassette motor 12, and the operation of moving the cassette holder 20 with respect to the head drum is performed by the chassis motor 3.
Although the operation is performed at 0, these operations may be switched by a switching mechanism using one motor as a drive source.

The guide block 3 of the guide mechanism 32
The lock function of the cassette holder 20 at the time of crimping is obtained by using the guide blocks 33 and 3.
4 may be performed by a lock mechanism provided separately.

The case where the example of the cassette loading device is applied to a video camera device has been described, but the present invention is also widely applicable to a cassette loading device of a recording / reproducing device such as an audio tape cassette.

[0087]

As described above, according to the recording / reproducing apparatus of the present invention, the first operation in which the cassette holder is pulled in from the discharge position together with the driving slider, and the cassette holder is moved to the reel base on the movable chassis after the first operation. And a third operation in which the cassette holder moves to the head drum side together with the movable chassis after the second operation.
And the so-called front-loading operation for electrically inserting and ejecting the cassette from the front of the apparatus, and the so-called linear skate operation for moving the cassette with respect to the head drum. This makes it possible to apply the present invention to a cassette loading mechanism of a video camera or the like without requiring a large change.

The second operation of the cassette holder is as follows.
An operation in which the guide pin of the cassette holder is guided by the inclined guide groove formed in the drive slider and moves relatively,
The operation is performed by the movement of the shaft pin of the cassette holder guided by the guide wall of the guide block provided on the movable chassis, so that the operation of positioning the pressure contact of the cassette holder on the reel base is performed smoothly and reliably. be able to.

Further, the inclined guide groove of the drive slider is
Since the inclination angle is set at different levels and the guide wall of the guide block is inclined, the load of the cassette holder pressed against the reel base can be reduced.

Further, since the cassette holder holds the cassette holder at the crimping position by the guide block at the start of the third operation, the cassette holder does not rise during the third operation of the cassette holder. In addition, the cassette can be accurately moved to the head drum side in a predetermined press-fit state on the reel base.

Further, there is provided a first drive motor for performing the first operation and the second operation, and a second drive motor for performing the third operation.
When the first drive motor performing the above operation is started, the first drive motor is disconnected from the transmission system of the first drive motor, so that the load on the second drive motor in the third operation is reduced, and the size of the second motor is reduced. Can be achieved.

Further, by applying the recording / reproducing apparatus of the present invention to a video tape recorder, a highly reliable cassette loading mechanism can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a cassette player of a recording / reproducing apparatus according to the present invention, in which main parts are separated.

FIG. 2 is a front view of a driving slider.

FIG. 3 is a side view of an operation position when the cassette cassette is ejected from the cassette.

FIG. 4 is a side view of the same operation of drawing in the tape cassette.

FIG. 5 is a side view of the lowering operation of the tape cassette.

FIG. 6 is a side view of the lowering operation of the tape cassette.

FIG. 7 is a side view of the tape cassette during linear skating.

FIG. 8A is a vector diagram of the pressing force received when the cassette holder is lowered. B is a vector diagram of a crimping force received when the cassette holder is crimped.

FIG. 9 is a configuration diagram of a switching mechanism of a motor drive system.

FIG. 10 is a plan view of an operating position when the cassette cassette is ejected from the cassette.

FIG. 11 is a plan view of the operation of loading the tape cassette all the way into the cassette holder.

FIG. 12 is a plan view of the tape cassette during the drawing operation.

FIG. 13 is a plan view of the tape cassette lowering completion operation.

FIG. 14 is a plan view of the operation of pushing the tape cassette out of the cassette holder.

FIG. 15 is a configuration diagram of a second lock mechanism.

FIG. 16 is a plan view showing an engaged state between a shaft pin of the cassette holder and a guide block.

[Explanation of symbols]

1 Kasekon, 2 bottom frame, 3,4 side frame, 5,6 drive slider, 10a, 10b, 11
a, 11b guide groove, 12 cassette motor, 15,
17 drive gear, 16 rack, 20 cassette holder, 23a, 23b, 24a, 24b inclined guide groove,
24a ', inclined guide grooves having different angles, 25 main chassis, 26 movable chassis, 30 chassis motor, guide mechanism, 33, 34 guide block, 35 cam,
36 bar member, 37 shaft pin, 39 guide wall, 42
Pendulum gear, 44 Pendulum arm, 50 Cassette pushing arm, 62 Lock arm, 71 link, 74
Stopper

Continued on the front page (72) Inventor Akihiro Uetake 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Masatake Takase 6-35-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Inside the corporation

Claims (7)

[Claims] 1. A recording device in which a cassette inserted from a cassette insertion slot is moved to a loading position, which is a recording / reproducing position, and an eject position, which is a discharging position, while being loaded in a cassette holder interlocked with a moving operation of a driving slider. In the reproducing apparatus, a first operation in which the cassette holder is retracted from the discharge position together with the driving slider, a second operation in which the cassette holder is pressure-bonded to the reel base on the movable chassis after the first operation, A third operation in which the cassette holder moves to the head drum side together with the movable chassis after the second operation. 2. The recording / reproducing apparatus according to claim 1, wherein said second operation of said cassette holder is an operation in which a guide pin of said cassette holder is guided by an inclined guide groove formed in said drive slider to relatively move. A recording / reproducing apparatus characterized in that the recording / reproducing apparatus is performed by an operation of moving a shaft pin of the cassette holder while being guided by a guide wall of a guide block provided on the movable chassis. 3. The recording / reproducing apparatus according to claim 1, wherein the inclined guide groove of the drive slider has two different inclination angles, and the guide wall of the guide block has an inclination. A recording / reproducing apparatus characterized in that the load applied to the table is reduced. 4. The recording / reproducing apparatus according to claim 2, wherein said cassette holder holds said cassette holder at a pressure-bonded position by said guide block when said third holder starts said third operation. . 5. The recording / reproducing apparatus according to claim 1, further comprising: a first drive motor for performing the first operation and the second operation; and a second drive motor for performing the third operation. ,
When starting the first drive motor in which the cassette holder performs the third operation together with the movable chassis, the cassette drive is disconnected from the transmission system of the first drive motor to reduce the load on the second drive motor. Recording and playback device. 6. The recording / reproducing apparatus according to claim 2, wherein the guide wall of the guide block and the shaft pin of the cassette holder have tapered surfaces that engage with each other. 7. The recording and reproducing apparatus according to claim 1, wherein the recording and reproducing apparatus is applied to a video tape recorder.