JPH0334634B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a video tape recorder with a simplified tape loading mechanism.

Video tape recorder (hereinafter referred to as VTR)
In this case, a loading mechanism is required to pull out the tape stored in the cassette pack, wrap it around a rotating cylinder equipped with a head, and run the tape.

In the conventional loading mechanism, the tape is pulled out from within a cassette pack set opposite to a rotating cylinder, with both ends supported by a pair of loading posts consisting of a supply side loading post and a take-up side loading post. The tape is wound around the rotating cylinder by moving the pair of loading posts to predetermined positions so as to symmetrically surround the rotating cylinder from the left and right sides.

In order to move the pair of loading posts symmetrically from within the cassette pack to predetermined positions around the rotating cylinder, the loading posts on the supply side and the loading post on the take-up side, each consisting of a vertical post and an inclined post, are required. By providing blocks that support the post and providing separate gear mechanisms to these blocks, each of the gear mechanisms described above is driven separately through the loading plate to which the driving force from the drive source is transmitted, and the post is moved to a predetermined position. The loading post is positioned.

However, providing a gear mechanism for each of the pair of loading posts on the supply side and the winding side as described above causes problems in that the structure becomes complicated and the size becomes unavoidable. There is also the problem that adjustment is difficult and requires a lot of time.

The present invention has been made in response to the above problems, and includes a loading plate that is driven by a loading gear and supports one loading post in order to move one side of a pair of loading posts. a gear mechanism, a slide plate that is moved by the loading plate to move the loading post on the other side to a predetermined position, and a post that is connected to the slide plate via a reversing spring and supports the loading post on the other side. A reversing mechanism consisting of a plate is provided and the loading post on one side is positioned so that the stroke amount of movement of the loading post on one side by the gear mechanism is larger than the amount of movement stroke of the loading post on the other side due to the reversing mechanism. It is an object of the present invention to provide a video tape recorder configured to eliminate the problem. Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic perspective view showing a video tape recorder according to an embodiment of the present invention, in which 1 is a tape, 2 is a supply reel, 3 is a take-up reel, and 4 is a vertical post 4.
a and an inclined post 4b; 5 a winding side loading post consisting of a vertical post 5a and an inclined post 5b; 6 a rotary cylinder; 7 a loading gear; 8 a loading plate; Full width erase head, 10
1 is a combination head, 11 is a capstan, 12 is a pinch roller, 14 is a post plate supporting the winding side loading post 5, 1
A slide plate 5 is engaged with the post plate 14 via a spring 16. The supply side loading post 4 is supported on the loading plate 8 and the loading gear 7
It is configured to move around the rotating cylinder 6 using a so-called gear mechanism. The winding side loading post 5 is connected to the rotary cylinder 6 by a reversing mechanism consisting of the post plate 14, slide plate 15 and spring 16.
It is configured to be moved to a desired position in the surroundings.

FIG. 1 shows each component of the VTR during tape loading. During unloading prior to loading, the winding side loading post 5 supported by the reversing mechanism is held in a predetermined position by a spring 16. The supply-side loading post 4, which is biased to the position shown in FIG.

In the above state, the drive source is operated to apply the driving force to the rotary cylinder 6, which is attached to the cassette pack (not shown) in which the tape 1 is stored by rotating it approximately 45 times clockwise. It is transmitted to the loading plate 8 via the loading gear 7 and rotated clockwise.

As a result, among the pair of loading posts 4 and 5 from which the tape 1 was pulled out from the cassette pack,
The supply side loading post 4 is moved rightward by the loading plate 8 to a predetermined position. At this time, when the loading plate 8 supporting the supply side loading post 4 moves (rotates) by a predetermined angle, the take-up side loading post 5 is positioned at a predetermined position by changing the fulcrum position of the spring 16. .

Through the above steps, the tape 1 is wound around the rotary cylinder 6, and loading is completed.This state is detected by a detection device (not shown), and then the full width erasing head 9 and the combination head 1 are loaded.
0, the capstan 11, the pinch roller 12, etc. operate to start tape running.

In the above loading operation, the moving stroke amount of the take-up side loading post 5 due to the reversing mechanism is the same as that of the supply side loading post 4 due to the gear mechanism.
can be kept smaller than that of .

FIGS. 2 and 3 are schematic diagrams showing the above loading operation from different angles, with FIG. 2 showing the configuration before loading (during unloading) and FIG. 3 showing the configuration during loading.

In Figures 2 and 3, 19A, 19B
is a pin provided on the loading plate 8,
20A and 20B are fixing pins on the post plate 14 side and slide plate 15 side of the spring 16, 21 is a stopper, 22 is a machine base,
23 is a cassette pack.

During unloading, as shown in Figure 2 a and b, the winding side loading posts 5 (5a, 5
The post plate 14 supporting b) is biased by the spring 16, but is not positioned.

Next, when loading, load plate 8
When rotated clockwise by the loading gear, the pin 19A on the loading plate 8 contacts the pin 15A on the post plate 15, as shown in FIGS. 3a and 3b. It acts as the center and pushes down. As a result, the fixing pin 20B of the spring 16 is pushed down from the position shown in FIG. 2, so that the spring 16 is reversed and moved to the position shown in FIG. 3. That is, by this, the post plate 14 is moved and positioned to a predetermined position where the vertical post 5a of the winding side loading post 5 is stopped by the stopper 21.

To perform the unloading operation again, rotate the loading plate 8 counterclockwise and push up the pin 15A with the pin 19B.
For the opposite reason to the above, the spring 16 is reversed again,
The winding side loading post 5 is positioned within the pack.

As is clear from the above explanation, according to the present invention,
A gear mechanism is provided to move one side of the pair of loading posts, and a reversing mechanism is provided to move the other side. This structure eliminates the conventional drawbacks by positioning the loading post so that it has a larger travel stroke, and the gear mechanism only needs to be provided on one side of the loading post. The mechanism can be simplified.

Therefore, the loading mechanism can be made smaller, thinner, and lighter, and it can also be adjusted easily, resulting in time savings.

[Brief explanation of drawings]

Figure 1 is a schematic perspective view showing an embodiment of the present invention, Figure 2 is a schematic perspective view showing an embodiment of the present invention;
Figures a, b and Figures 3 a, b are both a schematic top view and a schematic sectional view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Tape, 4... Supply side loading post, 5... Winding side loading post, 6... Rotating cylinder, 7... Loading gear, 8...
Loading plate, 14... Post plate, 15... Slide plate, 16... Spring, 18, 19A, 19B, 20A, 20B...
...Pin, 21...Stoppa.

Claims (1)

[Scope of Claims] 1. In a video tape recorder configured to move the tape to a predetermined position and wrap it around a rotating cylinder with both ends of the tape supported by a pair of loading posts, one of the pair of loading posts a gear mechanism having a loading plate driven by a loading gear and supporting a loading post on one side to move the loading post on the other side into position; A reversing mechanism consisting of a slide plate moved by the loading plate and a post plate connected to the slide plate via a reversing spring to support the loading post on the other side is provided, and the loading post on the one side is moved by the gear mechanism. The tape is wound around the rotating cylinder by making the moving stroke amount larger than the moving stroke amount of the loading post on the other side by the reversing mechanism to position both loading posts at predetermined positions. video tape recorder. 2. The invention is characterized in that when the loading post on one side is moved to a fixed position by the gear mechanism, the reversing mechanism is operated and the loading post on the other side starts to move. A videotape recorder according to scope 1. 3. The video tape recorder according to claim 1 or 2, wherein the pair of loading posts each comprises a vertical post and an inclined post.