JPH0785552A - Cassette loading device - Google Patents

Abstract

(57) [Abstract] [Purpose] To enable reliable insertion and positioning of a small cassette at a cassette loading position with a simple structure. [Structure] A base plate 3 is provided below the cassette holder 2 so as to be vertically movable. At the cassette loading position, the bottom plate 2b for the large cassette 41 of the cassette holder 2
And the bottom plate 3b of the base plate 3 for the small cassette 42,
They are arranged independently with a step. When the small cassette 42 is inserted into the cassette holder 2, the small cassette 42
Is held on the bottom plate 3b of the base plate 3 and guided by both edges 2d of the bottom plate 2b of the cassette holder 2. At the recording / reproducing position, the bottom plate 2a of the cassette holder 2
Then, the step between the base plate 3 and the bottom plate 3b is eliminated, and the base plate 3 is positioned on the same plane. Further, the cassette holder 2 is provided with a door member 8 having an opening 8a corresponding to the small cassette 42, and is opened only when the large cassette 41 is inserted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette mounting apparatus for a plurality of types of cassettes having different sizes and selectively mounting these cassettes on a recording / reproducing apparatus body. The present invention is applied to a video tape recorder or the like that can selectively use a cassette having a size of.

[0002]

2. Description of the Related Art Conventionally, cassette mounting devices for selectively mounting large cassettes or small cassettes having different sizes (outer dimensions) and reel intervals from each other in a recording / reproducing device body are almost all such as VTRs for broadcasting stations. The front loading method is adopted. This kind of cassette loading device is equipped with a loading mechanism for loading cassettes, a motor, etc., positions a large cassette or a small cassette inserted from the same insertion port at the cassette loading position, and then horizontally pulls it to the recording / reproducing position. It was to be attached and held.

[0003]

However, in the conventional cassette mounting apparatus as described above, selective insertion of large and small cassettes, detection of cassette insertion, discrimination of large and small cassettes, and subsequent mounting and holding of large and small cassettes, etc. But,
Since the cassette is inserted from the same insertion slot by the front loading method, when inserting the cassette into the cassette loading position, especially in the case of a small cassette, insert it properly at the predetermined position of the large cassette width insertion slot. It is necessary, and the insertion operation requires carefulness and is troublesome. Since a loading mechanism for loading the cassette, a motor, and the like are provided, it is difficult to obtain a simple mechanism and an extremely complicated mechanism is required. Portable type VT such as camera integrated VTR
As a cassette mounting device for R, the size and weight cannot be reduced. The number of parts is extremely large and the cost is very high. Moreover, the arrangement of other mechanisms is hindered, and the degree of freedom in design is lost. Further, in particular, as a drawback of the front loading method, since it is pulled horizontally from the cassette mounting position to the VTR main body and lowered to the recording / reproducing position, the external appearance becomes large due to the dead space. There were problems such as.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cassette mounting device for both large and small cassettes which can reliably guide and position the small cassette at the cassette loading position with a simple structure.

[0005]

In order to achieve the above object, the present invention is configured such that a large cassette and a small cassette can be selectively inserted and can be reciprocated between a cassette loading position and a recording / reproducing position. And a bottom surface of the small cassette for holding the bottom surface of the large cassette in the cassette holder when the large cassette or the small cassette is inserted into the cassette holder at the cassette loading position. Is arranged independently of the member for holding the sheet with a step, and the bottom surface holding member for the large cassette serves as a guide when the small cassette is inserted.

Further, it is preferable that the bottom holding member for the large cassette and the bottom holding member for the small cassette, which have the steps independently of each other, are located on the same plane with the steps eliminated at the recording / reproducing position. .

Further, it is preferable that the cassette holder is provided with a door member which is opened only when the large cassette is inserted, and the large cassette and the small cassette are discriminated by opening and closing the door member.

[0008]

According to the present invention constructed as described above, in the cassette holder at the cassette loading position, the bottom holding member for the large cassette and the bottom holding member for the small cassette have independent steps. Since they are arranged, each cassette is held on each bottom holding member when the large cassette or the small cassette is selectively inserted. Moreover, the bottom holding member for the large cassette serves as a guide for the small cassette. This makes it possible to reliably guide the insertion of the small cassette into the cassette holder having the size of the large cassette and to position the small cassette in the cassette holder with a very simple structure. Further, when the cassette holder is at the recording / reproducing position, the step difference of each bottom holding member is eliminated and they are located on the same plane, so that a large cassette and a small cassette can be mounted on the reel stand on the same plane. Furthermore, by opening and closing the door member that opens only when the large cassette is inserted, it is possible to distinguish between the large cassette and the small cassette.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a cassette mounting device for a VTR will be described below with reference to the drawings.

First, FIGS. 1 to 3 show the overall construction of a cassette holder in this embodiment, FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a side view. 1 to 3, 1
Is a main chassis of the VTR main body, and is a pair of reel stands 1 that are moved corresponding to the large cassette 41 and the small cassette 42.
8, a rotary head drum 19 and the like are arranged.

Reference numeral 2 is a cassette holder into which a large cassette 41 and a small cassette 42 are selectively inserted. The cassette holder 2 is formed in a front rectangular shape having a size of a substantially large cassette 41 by a top plate 2a, a bottom plate 2b, and left and right side plates 2c. Here, the bottom plate 2b of the cassette holder 2 is provided at the four corners, and the other parts are openings. As shown in FIG. 1, the width of the left and right bottom plates 2b is substantially the width of the small cassette 42.

Reference numeral 3 denotes a base plate which is a bottom holding member for the small cassette 42, and is provided below the cassette holder 2. The base plate 3 is formed by the bottom plate 3b and the left and right side plates 3c into a substantially U shape on the front side, and is formed so as to correspond to the openings between the bottom plates 2b of the cassette holder 2 in plan view. There is. The base plate 3 is supported by the guide shafts 4 and 5 provided on the side plate 2c of the cassette holder so as to be movable with respect to the cassette holder 2 in the vertical direction (arrows c and d directions). The base plate 3 is moved downward by the return spring 6 stretched between the pin 7 provided on the side plate 2c of the cassette holder 2 and the spring locking portion formed on the side plate 3c of the base plate 3. (Direction of arrow d)
Moved to.

A door member 8 is provided at the cassette insertion port of the cassette holder 2. The door member 8 is rotatably supported by a shaft 9 and is biased by a return spring 10 to rotate in the direction of arrow e (closing direction). Then, the door member 8 is locked by the pair of lock members 13 being engaged with the lower end of the door member 8 in a vertically closed state. The lock member 13 is attached to a leaf spring 14, and the leaf spring 14 is attached to the back surface of the bottom plate 2b of the cassette holder 2. Further, as shown in FIG. 1, an opening 8a having substantially the same width as the small cassette 42 is provided at the center of the door member 8.

Reference numeral 11 denotes a pair of cassette holders, each of which is attached to a leaf spring 12, and the leaf spring 12 is attached to the surface of the upper plate 2a of the cassette holder 2.

Next, FIGS. 9 and 10 show the entire pop-up type cassette mounting apparatus to which the above-mentioned cassette holder is applied. FIG. 9 is a state of the cassette loading position, and FIG. 10 is a state of the recording / reproducing position. And (a) and (b) are a plan view and a side view, respectively.

Reference numerals 21 and 22 are arms that support the cassette holder 2 and constitute a link for reciprocating up and down, 20
Is a biasing spring for raising the cassette holder 2. Figure 9
As shown in, at the cassette loading position (pop-up state) in which the cassette holder 2 is raised, the large cassette or the small cassette is selectively inserted from the direction of the arrow a. When the cassette holder 2 is pushed down against the biasing spring 20 in the direction of arrow b in FIG. 9, the cassette holder 2 is locked by the lock mechanism (not shown) as shown in FIG. The large cassette or the small cassette is mounted on the reel stand by being pressure-bonded and held at a predetermined position (above), and is ready for recording and reproduction.

According to the cassette mounting apparatus constructed as described above, when the small cassette 42 is inserted into the cassette holder 2 in FIG.
It is placed on the bottom plate 3b of the base plate 3 for the small cassette,
Further, both ends 2d of the bottom plate 2b of the cassette holder 2 and the opening 8a of the door member 8 are used as guides to be inserted into the cassette holder 2.

In FIG. 1, the small cassette 42 is a cassette holder 2
It is in a state of being inserted inside, and a side view thereof is shown in FIG.
Here, as shown in FIGS. 1 and 4, the door member 8 is locked by the lock member 13 and cannot be opened, and the small cassette 42 is mounted on the bottom plate 3b of the base plate 3 and the bottom of the cassette holder 2. It can be inserted only by using both end edges 2d of the face plate 2b and the opening 8a of the door member 8 as guides. The positioning of the small cassette 42 in the front-rear direction is
This is performed by a stopper (not shown) on the back side of the base plate 3.

Next, when the cassette holder 2 is pushed down in the direction of arrow b in FIG. 4, the state shown in FIG. 5 is obtained. This shows a state in which the base plate 3 for the small cassette comes into contact with a positioning stopper or the like (not shown) on the main chassis 1 and stops, and the small cassette 42 is being mounted on the reel stand 18.

When the cassette holder 2 is further pushed down in the direction of arrow b, the state shown in FIG.
On the other hand, the base plate 3 is relatively lifted in the direction of the arrow c against the return spring 6, so that the bottom plate 2b of the cassette holder 2 and the bottom plate 3b of the base plate 3 are flush with each other, and the cassette holder 2 is locked to the main chassis 1. In this state, the small cassette 42 is pressure-bonded to the cassette positioning stopper (not shown) on the main chassis 1 by the leaf spring 12 and the cassette retainer 11, and the reel base 18
The attachment of the small cassette 42 to the is completed. With this, the recording / reproducing is enabled.

From this state, when the cassette holder 2 is unlocked to the cassette loading position (pop-up state), the return spring 6 causes the base plate 3 to move the cassette holder 2 to the cassette holder 2.
On the other hand, the small cassette 42 is returned to the state shown in FIG. 4 again in the direction of the arrow d, and the small cassette 42 can be taken out from the cassette holder 2.

Next, when the large cassette 41 is inserted into the cassette holder 2 in FIG. 1, the side view of FIG. 7 is obtained. When the large cassette 41 is inserted, the lower part of the tip of the large cassette 41 is located at the left and right locking members 13 in FIG.
To contact. In FIG. 7, when the large cassette 42 pushes the inclined portion 13 a of the lock member 13, the door member 8 is unlocked, and the large cassette 41 causes the door member 8 to move.
Is rotated upward about the shaft 9 to be opened. In the cassette holder 2, the position of the large cassette 41 is defined by the bottom plate 2b and the side plate 2c. The positioning of the large cassette 41 in the front-rear direction is performed by a stopper (not shown) on the inner side of the bottom plate 2b.

The lock of the door member 8 is released only when the large cassette 41 abuts the left and right lock members 13 at the same time, and the small cassette 42 cannot abut the door members 8 at the same time. I can't.

In this embodiment, the detection switch 15 is provided on the upper surface plate 2a of the cassette holder 2, and the door member 8
With the switch open, the detection switch 15 is turned on to determine the insertion of the large cassette 41. Therefore, as shown in FIG. 8A, the reel stand 18 is normally set at a position corresponding to the small cassette 42, and only when the large cassette 41 is detected, the reel stand moving mechanism (not shown) is used to 8
As shown in (b), the reel base 18 may be moved to the corresponding position of the large cassette 41.

In FIG. 7, the large cassette 41 is pressed against the bottom plate 2b of the cassette holder 2 by the leaf spring 12 and the cassette retainer 11. As a result, when the cassette holder 2 is pushed down in the direction of the arrow b, as in the case of the small cassette 42, as shown in FIGS. 5 to 6, the bottom plate 2b of the cassette holder 2 and the base plate 3 for the small cassette are shown. The bottom plate 3b of the same becomes the same surface, and the cassette holder 2 is locked to the main chassis 1. In this state, the large cassette 41 is pressed against a cassette positioning stopper (not shown) on the main chassis 1 by the leaf spring 12 and the cassette retainer 11, and the mounting of the large cassette 1 on the reel stand 18 is completed. With this, the recording / reproducing is enabled.

From this state, when the cassette holder 2 is unlocked to the cassette loading position (pop-up state), the base plate 3 is returned by the return spring 6 and the large cassette 41 can be taken out. Further, when the large cassette 41 is taken out, the return spring 10 closes the door member 8, and the state shown in FIG. 1 is obtained.

As described above, in the present embodiment, in the cassette loading device for selectively loading the large cassette 41 or the small cassette 42, the front loading method is not used but the pop-up method is used to hold the bottom surface for the large cassette. Since the bottom plate 2b of the cassette holder 2 which is a member and the bottom plate 3b of the base plate 3 which is a bottom holding member for the small cassette are independently arranged with a step, the large cassette 41 or the small cassette 42 is provided. At the time of selective insertion, the cassettes 41 and 42 are held on the bottom plates 2b and 3b. Moreover, both end edges 2d of the bottom plate 2b for the large cassette serve as a guide for the small cassette 42. Therefore,
The guide for inserting the small cassette 42 into the cassette holder 2 having the size of the large cassette 41 and the positioning of the small cassette 42 in the cassette holder 2 can be reliably performed with an extremely simple structure.

When the cassette holder 2 is at the recording / reproducing position, the steps of the bottom plates 2b and 3b are eliminated and they are located on the same plane, so that the large cassette 41 and the small cassette 42 can be mounted on the reel stand 18. Can be performed at the same position on the same plane. Furthermore, by detecting the opening / closing of the door member 8 that opens only when the large cassette 41 is inserted,
The large cassette 41 and the small cassette 42 can be reliably discriminated with a simple configuration.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various effective modifications and applications are possible based on the technical idea of the present invention. . For example, in the embodiment, the pop-up method has been described, but the conventional front loading method can also be applied.

[0030]

As described above, according to the present invention,
When inserting a small cassette into the cassette holder, hold the small cassette on the bottom holding member for the small cassette that has a step independently of the bottom holding member for the large cassette, and at that time, for the large cassette Can be guided by the bottom holding member. Further, since the bottom surface holding members are located on the same plane when the cassette holder is at the recording / reproducing position, the large cassette and the small cassette can be mounted on the reel base on the same plane. Furthermore, by opening and closing the door member that opens only when a large cassette is inserted, it is possible to distinguish between a large cassette and a small cassette. Therefore, with a simple structure that does not use a complicated mechanism such as a loading mechanism or a motor, it is possible to realize a cassette loading device that can reliably and easily guide and position a small cassette at the cassette loading position. Further, the number of parts is small, the cost can be reduced, and the size and weight of the mechanism itself and the exterior can be reduced. further,
The other mechanical parts can be easily arranged, and the degree of freedom in design can be increased.

[Brief description of drawings]

FIG. 1 is a front view of a cassette holder in an embodiment in which the present invention is applied to a cassette mounting device for a VTR.

FIG. 2 is a plan view of the cassette holder in the above embodiment.

FIG. 3 is a side view of the cassette holder in the above embodiment.

FIG. 4 is a side view of the cassette holder in the above embodiment in a state where the small cassette is inserted.

FIG. 5 is a side view of the cassette holder in the above embodiment, which is in the middle of descending with a small cassette inserted.

FIG. 6 is a side view showing a state where the small cassette is mounted on the reel base of the cassette holder in the above embodiment.

FIG. 7 is a side view of the cassette holder in the above embodiment in a state where a large cassette is inserted.

FIG. 8 is a schematic diagram showing a positional relationship of reel stands corresponding to large and small cassettes in the above embodiment.

9A and 9B show a cassette loading position in a pop-up type cassette mounting device to which the cassette holder of the above embodiment is applied, FIG. 9A is a plan view, and FIG. 9B is a side view.

10A and 10B show recording / reproducing positions in the cassette mounting device, FIG. 10A is a plan view, and FIG. 10B is a side view.

[Explanation of symbols]

 1 Main Chassis 2 Cassette Holder 2a Bottom Plate of Cassette Holder 2d Edges of Bottom Plate 3 Base Plate 3b Bottom Plate of Base Plate 6 Base Plate Return Spring 8 Door Member 8a Door Member Opening Spring 10 Door Member Return Spring 11 Cassette Presser 13 Lock member for door member 15 Detection switch 18 Reel stand 20 Biasing spring 21, 22 Arm 41 Large cassette 42 Small cassette

Claims (3)

[Claims] 1. A cassette loading device having a cassette holder configured to be capable of selectively inserting a large cassette and a small cassette and reciprocating between a cassette loading position and a recording / reproducing position. At the time of inserting a large cassette or a small cassette into the cassette holder, the member for holding the bottom surface of the large cassette and the member for holding the bottom surface of the small cassette in the cassette holder are arranged independently with a step. In addition, the cassette mounting device is characterized in that the bottom holding member for the large cassette serves as a guide when the small cassette is inserted. 2. A bottom holding member for a large-sized cassette and a bottom holding member for a small-sized cassette, each of which has a step independently of each other, are arranged on the same plane with the step removed at the recording / reproducing position. The cassette mounting device according to claim 1, wherein: 3. A door member, which is opened only when a large cassette is inserted, is provided in the cassette holder, and a large cassette and a small cassette are discriminated by opening and closing the door member. 2. The cassette mounting device described in 2.