JP3191500B2 - Cassette loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading apparatus in which two or more kinds of cassettes having different sizes can be used by one mechanism (cassette component: cassette component).

[0002]

2. Description of the Related Art FIGS. 8 and 9 show a conventional cassette loading apparatus in which cassettes having different sizes can be used.
The schematic diagram of the insertion part of the cassette from which a magnitude | size differs each is shown.

In both figures, reference numeral 41 denotes a mechanical chassis,
42 is a cassette holder in which a cassette is mounted, 43 is a casing member of a cassette, 43 is a cassette insertion detection lever for detecting that a cassette has been inserted into the cassette, 45
Is a detection switch operated by the turning operation of the detection lever 44.

Referring to FIG. 8 as an example, when a small cassette 46 is inserted through an insertion window 43a of an exterior member 43, it is mounted on a cassette holder 42 waiting in a cassette. Then, the cassette 46 is further pushed in so that the rear end of the cassette is inserted into the insertion window 43 a of the exterior member 43.
Is reached, the cassette detection lever 44 is rotated by the cassette holder 42 and the detection switch 45 is operated to switch the signal.

[0005] Thereafter, the cassette holder 42 is driven by a cassette drive motor connected by a gear (not shown) to form guide grooves 48a, 4 formed in the frame 48.
The cassette 46 descends along 8a and is positioned at the loading position.

Next, as shown in FIG.
When the cassette 7 is used, the signal of the detection switch 45 is switched in a state in which the cassette is protruded from the exterior member 43 by a long depth. In this case, there is no means for detecting that the type of the cassette and the rear end of the large cassette have reached the position of the exterior member.Therefore, it is necessary to energize the cassette controller motor at this position and draw the cassette into the cassette controller electrically. Become.

That is, at the timing when the cassette is electrically pulled in, the position of the rear end of the cassette protrudes from the exterior member 43 by the difference in the size of the cassette.

[0008]

As described above, if the position at which the cassette is electrically driven to be drawn into the cassette differs depending on the size of the cassette, the position at which the cassette starts to move is set to the smallest cassette drawing start position. Need to match. For example, when this position is set such that the exterior member 43 and the rear end of the cassette 46 are aligned as shown in FIG. 8, the position at which the large cassette 47 starts to move is determined by the difference in the size of the cassette from the exterior member 43 as shown in FIG. It will be the position where it jumped out.

Therefore, since the cassette can be grasped by hand when the cassette is electrically pulled in from here, it is possible to forcibly pull out the cassette against the movement of the electrically driven cassette. As a result, there is a possibility that an excessive force is applied to the cassette control mechanism, and a malfunction or damage to the mechanism is likely to occur.

In a conventional model using only one kind of cassette (for example, VHS system),
Since the majority of the cassettes start retracting electrically when the rear end of the cassette almost coincides with the position of the exterior member, when the cassette starts to move electrically from a position far before the exterior member, it feels strange. The operation feeling becomes worse.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. When a cassette having a different size is inserted, the rear end position of the cassette which starts to be electrically driven is substantially coincident with the exterior member. It is an object of the present invention to obtain a cassette loading device which can be operated from the above.

[0012]

In order to achieve the above-mentioned object, a cassette loading device according to the present invention is a cassette loading device capable of inserting and discharging two or more types of cassettes having different sizes by electric means. a first switch operated by the first detection member and the first detection member for detecting the type of size of the cassette, the size different of
A second detecting member for detecting that a cassette having been inserted is inserted, and a second switch operated by the second detecting member.
Insertion position at which the detected position starts to be retracted by electric means
The large cassette passes through the second detection member and is detected.
The position detected by the ejection means is retracted by the electric means
It is the insertion position to start, when it is retracted by electric means
The rear end positions of the cassettes having different sizes are made constant near the cassette insertion window.

Further, the cassette loading device according to the present invention comprises:
A first detection member detects widths of cassettes having different sizes.
That's what I did .

Further, the cassette loading device according to the present invention comprises:
Detection means that large cassette starts to be pulled in by electric means
As a step, it rotates according to the amount of movement of the cassette holder.
This is performed by detecting the rotation angle of the capstan motor .

Further, the cassette loading device according to the present invention comprises:
Detection means that large cassette starts to be pulled in by electric means
As a step , the third detecting member and the third detecting member
This is performed by a third switch operated by the user .

[0016]

[0017]

[0018]

In the cassette loading device according to the present invention having the above-described structure, the detection of the size of the cassette is detected by the first detecting member and the first switch, and the position of the position where the rear end of the small cassette ends is inserted. detection distal end of the second detection member and the second scan is performed by the switch, the detection of the position of a large cassette rear ends are inserted large cassette
The detection is performed by the detecting means after the section has passed the second detecting member .

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cassette loading device according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a cassette loading device according to the present embodiment, FIG. 2 is an exploded perspective view of the cassette loading device, and FIG. 3 is a sectional view of a loading portion of the cassette loading device.

In each of the figures, reference numeral 1 denotes a mechanical chassis. Frames 2 and 3 are provided on both sides of the mechanical chassis 1, and two guide grooves 2a and 3a are formed in both frames 2 and 3 in parallel. The other ends of the guide grooves 2a and 3a are bent downward. Driving sliders 4 and 5 are provided on outer surfaces of the frames 2 and 3, and driving sliders 4 and 5 are provided.
Reference numeral 5 denotes shaft holes 6 and 7 which are inserted through horizontally formed long holes 4b and 5b and corresponding long holes 2b and 3b formed in frames 2 and 3, respectively. By fixing to 1, the drive sliders 4 and 5 can be slid in the front-rear direction.

An exterior member 9 having a cassette insertion window 8 is provided on the front surface of the mechanical chassis 1. Reference numeral 10 denotes a cassette holder. Two pins 11 and 12 provided on both sides of the cassette holder 10 pass through the guide grooves 2a and 3a of the frames 2 and 3, respectively.
5 are engaged with the guide grooves 4a and 5a.

Further, rack portions 13 and 14 are formed on the upper edges of the driving sliders 4 and 5, and these rack portions 13 and 14 are formed.
Drive gears 16 and 17 provided at both ends of one shaft 15 supported by the frames 2 and 3 mesh with each other. This axis 1
5 is provided with another gear 18 near one drive gear 16, and this gear 18 has a reduction gear group 19a, 19b, 19g.
c and the bevel gear 19d in this order, and the speed reduction mechanism 19
Is composed.

In this reduction gear group, the reduction gears 19a, 19a,
19b, 19c are supported by respective shafts 19a ', 19b', 19c 'provided on one frame 2, the bevel gear 19d is supported by a shaft 19d' provided on the chassis 1, and a flat gear 19e of the bevel gear 19d. Are arranged on the back side of the chassis 1.

Reference numeral 20 denotes a capstan provided on the chassis 1, and 21 denotes a capstan motor. The capstan motor 21 has a rotation detecting element (FG element) mounted thereon. Reference numeral 22 denotes a gear directly connected to the capstan motor 21.

On the rear surface of the chassis 1, there is provided a switching gear 24 composed of two meshing gears 24a and 24b supported by a link 23. One of the gears 24a is supported by a support shaft 24a 'provided on the frame 1. This gear 2
4a meshes with the above-mentioned spur gear 19e of the reduction gear, and a switching arm 26 supported on a support shaft 26a provided on the frame 1 is engaged with the shaft pin 25 of the other gear 24b. The swinging operation is performed by the operation of the switching cam, and the gear 24b of the switching gear 24 can be engaged with and disengaged from the gear 22 of the capstan motor 21 described above.

On the other hand, a cassette size detecting lever 27 serving as a first detecting member is provided on the inner surface of the frame 3 in the vicinity of the outer member 9 so as to be rotatable about a support shaft 28. The cassette size detection lever 27 is for detecting the size of the cassette by detecting the type of the cassette size, for example, the width of the cassette. When a small cassette is inserted through the cassette insertion window 8,
This cassette does not come into contact with the detection lever 27, and when a large cassette is inserted through the cassette insertion window 8, the cassette comes into contact with the detection lever 27 to rotate it, and an operation piece 27a provided on the detection lever 27 is provided. Thus, the cassette size detection switch 29 serving as the first switch on the chassis 1 can be switched.

A cassette insertion detecting lever 30 serving as a second detecting member is provided on the inner surface of the frame 2 at the back of the cassette holder 10 so as to be rotatable about a fulcrum shaft 31. The cassette insertion detection lever 30 detects whether a cassette is inserted into the cassette, regardless of the size of the cassette, and when the cassette is pushed into the cassette while inserted into the cassette holder 10, the cassette holder 10 comes into contact with the cassette insertion detection lever 30 to rotate it, and the detection lever 30
With the operation piece 30a, the cassette insertion detection switch 32 serving as a second switch on the chassis 1 is switched.

Moreover, the cassette insertion detection lever 30
When a small cassette is inserted into the cassette holder 10 and pushed into the cassette, when the rear end of the cassette substantially coincides with the cassette insertion window 8 of the exterior member 9, the cassette holder 10 rotates the cassette insertion detection lever 30. Is located in the position.

Here, the manual movement of the cassette holder 10 is such that the pins 11, 12 provided on both sides thereof move along the guide grooves 2a, 3a formed in the frames 2, 3, and the drive slider 4, 5 is driven.
Accordingly, the drive gears 16, 17 and gear 18 meshing with the rack portions 13, 14 by driving the drive sliders 4, 5 and the reduction gear groups 19a, 19b, 19c, and 19 are provided.
The rotation is transmitted to the switching gear 24 via the gear d, and the capstan motor 21 is rotated from the switching gear 24 via the gear 22. Further, when the capstan motor 21 is driven to rotate, the cassette holder 10 is electrically pulled in through the transmission path opposite to the above, and the cassette holder 1 is moved.
0 can be moved to the loading position.

Next, the operation of the cassette loading device according to the present invention will be described. First, the case of loading a small cassette will be described with reference to FIG. 3. When the small cassette 33 is inserted into the cassette holder 10 through the cassette insertion window 8 of the exterior member 9, since the cassette 33 has a small width, the cassette size detection lever 27 Without contacting
The cassette size detection switch 29 does not perform the switching operation. With the cassette 33 inserted in the cassette holder 10, the cassette 33 is further inserted, and the cassette rear end 33 is inserted.
When a is inserted to a position substantially corresponding to the cassette insertion window 8, the cassette holder 10 rotates the cassette insertion detection lever 30, and switches the cassette insertion detection switch 32. At this point, the cassette size detection switch 29 that does not switch and the cassette insertion detection switch 32 that has switched operate determine that a small cassette has been inserted into the cassette.

The capstan motor 21 is driven to rotate by the discrimination signal from the switches 29 and 32, and the switching gear 24, the reduction gear groups 19a to 19d, the driving gear 16,
17 and the cassette holder 1 through the drive sliders 4 and 5
0 is electrically pulled in along the guide grooves 2a and 3a, and the cassette 33 is positioned at the loading position.

When recording or playing back a cassette,
The switching gear 24 is configured to be disengaged from the gear 22 of the capstan motor 21 by operation of a mode switching cam (not shown) or the like.

Next, the case of loading a large cassette is shown in FIG.
In the following, a large cassette 34 is mounted on the exterior member 9.
When the cassette 34 is inserted into the cassette holder 10 through the cassette insertion window 8, the cassette 34 has a large width and contacts the cassette size detection lever 27 to switch the cassette size detection lever 29. Is detected. When the cassette 33 is further inserted with the cassette 34 inserted in the cassette holder 10, the cassette holder 10 switches the cassette insertion detection switch 32 via the cassette insertion detection lever 30.

However, in this position, the large cassette 34
In this case, the rear end is in a state of greatly protruding from the exterior member 9. Therefore, in this state, the capstan motor 2
1 is not energized, and further inserts the cassette 34 until the rear end of the large cassette almost coincides with the exterior member 9. For this reason, the drive sliders 4 and 5, the drive gears 16 and 17, the reduction gear 1
9a to 19d, the capstan motor 21 is rotated via the switching gear 24 and the gear 22.

That is, since the capstan motor 21 is provided with a rotation detecting element (FG element) for controlling the rotation speed, the rotation angle of the capstan motor 21 can be detected. Therefore, after the cassette insertion detection switch 30 detects the insertion of the cassette 34,
It is possible to detect the rotation angle of the capstan motor 21 by an amount corresponding to the amount of movement of the cassette holder 10 until the rear end of the large cassette almost coincides with the exterior member 9 and delay the timing of energizing the capstan motor 21. it can.

Thereafter, the capstan motor 21 is driven to rotate, and the switching gear 24, the reduction gear groups 19a to 19d,
The cassette holder 10 is electrically driven along the guide grooves 2a and 3a via the drive gears 16 and 17 and the drive sliders 4 and 5, and the cassette 34 is positioned at the loading position.

As described above, the cassette loading device according to the present invention comprises a cassette size detection lever 27 and a cassette size detection switch 29 for detecting the type of cassette size.
A cassette insertion detection lever 30 for detecting that a cassette has been inserted, a cassette insertion detection switch 32, and
In the case of a large cassette, by providing the capstan motor 21 with a rotation detecting element for detecting a rotation angle,
Regardless of the difference in the size of the cassette, the cassette can be prevented from being grasped by hand at the beginning of the retraction because the retraction of the cassette is started from the position where the rear end of the cassette substantially coincides with the exterior member. .

As another means for detecting the amount of movement of the cassette holder 10 described above, there is a method shown in FIG.
In this example, the reduction gear group 19 shown in FIG. 1 is connected to a dedicated motor 35, and a rotation detection reflective label 36 is attached to one of the gears 19 c in the reduction gear group 19. Facing photo reflector 3
7 are provided.

That is, when the cassette holder 10 is manually moved, the reduction gear 19 is rotated via the driving sliders 4 and 5 and the driving gears 16 and 17, and the reflection label 36 is rotated, as shown in FIG. The amount of movement of the cassette holder 10 can be detected by detecting the rotation angle of the reflective label 36 with the photo reflector 37.

The electric draw-in operation of the cassette holder 10 is performed via the reduction gear group 19, the drive gears 16 and 17, and the drive sliders 4 and 5 by the rotational drive of the motor 35.

FIGS. 6 and 7 show another example in which the position at which the cassette starts to move electrically is detected using a dedicated switch for each size of the cassette.

3 differs from FIG. 3 in that a detection lever 38 for detecting the position of the cassette holder 10 and a detection switch 39 serving as a third switch are inserted when the rear end of the large cassette is inserted to a position substantially coincident with the exterior member 9. That is the provision.

For example, when a small cassette 33 is inserted as shown in FIG. 6, the cassette size detection lever 27 for detecting the size of the cassette does not come into contact with the cassette size detection switch 29. When the rear end of the cassette reaches the position of the exterior member 9, the cassette insertion detection switch 32 is switched via the cassette insertion detection lever 30, and the cassette motor is driven to rotate from the position of the cassette to draw the cassette electrically. Is the same as in the case of FIG. 3 described above.

When a large cassette 34 is inserted as shown in FIG. 7, since the cassette size detection switch 29 determines that a large cassette has been inserted, the insertion of a small cassette is detected. A newly provided detection lever 38 for detecting insertion of a large cassette 34 ignoring the detection switch 32 even when it is switched.
When the detection switch 39 is switched via
Here, the cassette cassette motor is energized to electrically draw in the large cassette 34.

Therefore, also in the above-described example, the position of the rear end of the cassette can be set to a position substantially coincident with the exterior member 9 regardless of the size of the cassette at the timing when the cassette is electrically driven.

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.

[0047]

As described above, the cassette loading device according to the present invention comprises a first detecting member for detecting the type of the size of the cassette, a first switch operated by the first detecting member, second detecting member and the second test having different cassette sizes is detected to be inserted
A second switch operated by an output member ,
For small cassettes, the position detected by the second detection member is
This is the insertion position where the moving means starts pulling in.
The set passes through the second detecting member and is detected by the detecting means.
The inserted position is the insertion position where the retraction is started by the electric means.
Different in size when retracted by electric means
Since the rear end position of the cassette is made constant near the cassette insertion window, it is possible to make it impossible to grasp the cassette to be pulled in by hand. Therefore, it is impossible to pull out the cassette by hand against the cassette that is electrically driven, and as a result, the possibility of a malfunction of the cassette control mechanism, a breakage of the mechanism, and the like caused by this can be greatly reduced. effective.

Further, the position of the rear end of the cassette at the time when the cassette is started to be pulled in by the electric means is made constant near the cassette insertion window regardless of the type of the cassette. The operation feeling is the same as that of the loading device, and the cassette loading device has no uncomfortable feeling.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cassette loading device of the present embodiment.

FIG. 2 is an exploded perspective view of the cassette loading device of the present embodiment.

FIG. 3 is an explanatory diagram of an operation when a small cassette is inserted.

FIG. 4 is an explanatory diagram of an operation when a large cassette is inserted.

FIG. 5 is a perspective view of a cassette loading device provided with another rotation detection mechanism.

FIG. 6 is an explanatory view when a small cassette is inserted by another example of the cassette insertion detecting means.

FIG. 7 is an explanatory view when a large cassette is inserted by another example of the cassette insertion detecting means.

FIG. 8 is an explanatory diagram of detection of a small cassette in a conventional cassette loading device.

FIG. 9 is an explanatory diagram of large cassette detection in a conventional cassette loading device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mechanical chassis 2, 3 frame 4, 5 drive slider 8 cassette insertion window 9 exterior member 10 cassette holder 13, 14 rack section 16, 17 drive gear 19 reduction gear 20 capstan 21 capstan motor 22 gear 24 switching gear 26 switching arm 27 Cassette size detection lever 29 Cassette size detection switch 30 Cassette insertion detection lever 32 Cassette insertion detection switch 33 Small cassette 34 Large cassette 35 Motor 36 Reflective label 37 Photoreflector 38 Detection lever 39 Detection switch

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Uetake 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Kazuyoshi Suzuki 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 15/675

Claims (4)

(57) [Claims] 1. A cassette loading device capable of inserting and discharging two or more kinds of cassettes having different sizes by electric means, comprising: a first detecting member for detecting the size of the cassette; and the first detecting member. A first switch operated by a member, a second detection member for detecting that a cassette having a different size has been inserted, and a second switch operated by the second detection member.
A small cassette detected by the second detection member.
Insertion position where the retracted position starts to be retracted by the electric means
And the large cassette passes through the second detection member.
The position detected by the detecting means is pulled by the electric means.
It is the insertion position where it starts to be drawn in.
A cassette loading device wherein the position of the rear end of the cassette is constant near the cassette insertion window. 2. The first detecting member has a different size.
2. The cassette loading device according to claim 1 , wherein the width of the cassette is detected . 3. A large cassette is pulled by said electric means.
The detection means that starts to cut in depends on the amount of movement of the cassette holder.
For detecting the rotation angle of a capstan motor that rotates correspondingly
2. The cassette loading device according to claim 1, wherein the cassette loading is performed. 4. A large cassette is pulled by said electric means.
The detecting means for starting the intrusion includes a third detecting member and the third detecting member.
By the third switch operated by the detecting member of
2. The cassette loading device according to claim 1, wherein