JPS593398Y2 - Eject device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette type video tape recorder (hereinafter abbreviated as VTR), and particularly to an ejector device suitable for implementation in a portable type VTR.

The above-mentioned portable type VTRs are mostly used for outdoor video shooting, and are more commonly used by hanging them on the shoulder than by placing them flat on a fixed stand. It is often used vertically.

Therefore, the above-mentioned ejecting device can be placed horizontally or vertically.
Because the difference in the rotational torque of the ejector due to the difference in posture such as the weight of the video cassette becomes significant, the strong impact force and impact sound generated when the cassette holder is opened during the eject operation for loading and unloading the video cassette is generated. It becomes a problem.

In particular, video cassettes used for long periods of time have a large amount of tape, which increases the weight accordingly, which increases the difference between the above-mentioned usage conditions when placed horizontally and vertically, and the impact force and impact noise received by the ejector device become even more problematic. .

In order to solve the above-mentioned problems, some eject devices use a balancer, but there are still problems such as the size of the balancer and the space required to position it symmetrically with respect to the center of rotation.

The present invention solves the above-mentioned problems with a device having a simple configuration, especially when used vertically.
It is an object of the present invention to provide an ejecting device in which the above-mentioned impact is softened by a rotary type oil damper, and the above-mentioned damper is activated only when loading/unloading a cassette.

An embodiment of the present invention will be described below with reference to the drawings.

Reference numerals 1 and 2 in the figure are connecting rods, each of which is pivoted 3 at approximately the center of the connecting rod 1, forming an X-shaped link mechanism.

Furthermore, the connecting rod 1 is pivotally supported at both ends by 5 and 6, and the connecting rod 2 is pivotally supported by 7.

Further, reference numeral 4 denotes a cassette mounting table on which the cassette is placed, and its hook portion 4A is pushed down and locked by a stopper (not shown) when the cassette is mounted in the normal position.

For convenience of explanation, the illustrated drawings show a case where the stopper is removed by an eject operation to release the lock, and the cassette mounting table is placed in the cassette loading/unloading position.

The connecting rod 2 is pivoted at 7, and an extension 2A of the connecting rod 2 extending in the right angle direction is engaged with a spring 8 whose end is connected to the fixed plate 10.
is biased in the upward direction (cassette loading/unloading direction) shown in the figure.

Further, a sector gear 9 is pivotally supported on the connecting rod 2 and the sector gear 9 is engaged with a gear 11A provided on a coaxial shaft with a rotary damper 11, which will be described later, when the cassette is installed or removed. It is rotated together with the rod 2 within a predetermined range.

The fixed plate 10 described above is provided with a planting rod 12,
The rotary damper 11 described above is arranged so as to be rotated within a predetermined range about the planting pin 13 as a fulcrum.

The lower limit of the rotation range of the rotary damper 11 is regulated by the upright piece 12A provided on the planting rod 12.

Moreover, the upper limit is regulated by the stop piece 14.

The stop piece 14 is fixed to the planting rod 12, but since it is fixed with a screw 15 in the elongated hole 14A, the fixing position can be adjusted.

In the ejecting device having the above-described configuration, the rotary damper 11 is connected to the planting pin 13 in the illustrated state.
However, when used horizontally, gravity acts on the rotary damper 11 in the direction of arrow A, that is, downward, and the rotary damper 11 is rotated with the gear IIA provided on the concentric axis and the sector-shaped The mesh with gear 9 is disengaged.

In addition, when used vertically, gravity acts on the rotary damper 11 in the direction of arrow B, that is, in the right direction, and the gear 11A and the fan-shaped gear 9 mesh with each other, and the damper is activated when the cassette is inserted or removed by the eject operation. Ru.

In addition, by installing the rotary damper 11 so that the rotation angle at this time is a biting angle with respect to the fan-shaped gear 9, it can be operated reliably as a damper.

Furthermore, when mounting a cassette, the cassette mounting table 4 is pushed down against the spring 8 from the state shown in the figure, and the hook portion 4A is locked by a stopper (not shown). There is no need to apply any extra force when doing so.

As described above, according to the present invention, it is possible to provide an ejector device that can dampen the impact when used vertically, especially in a portable type case VTR, since it is configured to have a damper effect when used vertically. .

Although the embodiment of the present invention described above uses a transmission mechanism using gears, it is also possible to use a transmission mechanism using friction, and other modifications may be made without changing the gist of the invention. It can be implemented by

[Brief explanation of the drawing]

The figure shows an ejector device, which is an embodiment of the present invention, in a state during loading and unloading of a cassette. 1.2: Connecting rod, 4: Cassette mounting table, 8: Spring, 9:
Fan-shaped gear, 11A: Gear, 11: Rotary damper,
14: Stopper

Claims (1)

[Scope of utility model registration request] In an eject device for a cassette-type portable VTR, a fan-shaped gear is pivotally supported by one of the connecting rods that constitutes an almost X-shaped link mechanism that raises and lowers a cassette mounting table, and a fan-shaped gear is arranged on a fixed plate via a standing rod. and a rotary damper having a gear on a concentric shaft that meshes with the fan-shaped gear, and only when the cassette is installed or removed when used vertically.
An ejecting device characterized in that the fan-shaped gear described above and a gear provided on a rotary damper mesh with each other to perform a damping action.